Hydraulics & Pneumatics - Hydraulics & Pneumatics is the leading international technical resource for fluid power http://hydraulicspneumatics.com/rss.xml en Hydraulic Cylinders Keep Their Cool (.PDF Download) http://hydraulicspneumatics.com/datasheet/hydraulic-cylinders-keep-their-cool-pdf-download <div class="node-body datasheet-body"><p><span style="color: rgb(51, 51, 51); font-family: Georgia, Times, &quot;Times New Roman&quot;, serif; font-size: 15px;">Hydraulic cylinders often operate under conditions that would quickly destroy other methods of linear motion. Dirt, water, wide temperature variations, and shock loading...</span></p> <p><strong>Register or Sign in below to download the full article in .PDF format, including high-resolution graphics and schematics when applicable.</strong></p> <div class="gatedLogin well"> <div class="contentPadding clearfix"> <h2>Register for Complete Access (Valid Email Required)</h2> <p><p><img height="auto" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/10/SALARY_SURVEY_HPcover.jpg" width="100%" />By registering on Hydraulics &amp; Pneumatics now, you&#39;ll not only gain access to , you&#39;ll also receive a complimentary copy of <em>Hydraulics &amp; Pneumatics 2016 Salary &amp; Career Report</em>.</p> </p> <div class="gatedLoginButtons gated-register-button"> <div class="button-region"> <a href="/penton_ur/nojs/user/register?source=gated&nid=41511&regmode=1" class="ctools-use-modal btn btn-branded btn-wide ctools-modal-register" title="Register at this site.">Register</a> </div> <div class="loginLinkText"> Already registered? <a href="/penton_ur/nojs/login" class="ctools-use-modal ctools-modal-log_in" title="">Log In</a> here. </div> </div> </div> </div> </div> Gold Thu, 19 Jan 2017 22:26:00 +0000 41511 at http://hydraulicspneumatics.com Robot-Like Cleaner Uses Pneumatics to Scale Large Surfaces (.PDF Download) http://hydraulicspneumatics.com/datasheet/robot-cleaner-uses-pneumatics-scale-large-surfaces-pdf-download <div class="node-body datasheet-body"><p><span style="color: rgb(51, 51, 51); font-family: Georgia, Times, &quot;Times New Roman&quot;, serif; font-size: 15px;">Automated cleaning and paint removal for ship hulls and tanks has always been a tough job. Workers typically use high-pressure nozzles operating at 3,000 bar (43,500 psig) to blast sea life...</span></p> <p><strong>Register or Sign in below to download the full article in .PDF format, including high-resolution graphics and schematics when applicable.</strong></p> <div class="gatedLogin well"> <div class="contentPadding clearfix"> <h2>Register for Complete Access (Valid Email Required)</h2> <p><p><img height="auto" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/10/SALARY_SURVEY_HPcover.jpg" width="100%" />By registering on Hydraulics &amp; Pneumatics now, you&#39;ll not only gain access to , you&#39;ll also receive a complimentary copy of <em>Hydraulics &amp; Pneumatics 2016 Salary &amp; Career Report</em>.</p> </p> <div class="gatedLoginButtons gated-register-button"> <div class="button-region"> <a href="/penton_ur/nojs/user/register?source=gated&nid=41501&regmode=1" class="ctools-use-modal btn btn-branded btn-wide ctools-modal-register" title="Register at this site.">Register</a> </div> <div class="loginLinkText"> Already registered? <a href="/penton_ur/nojs/login" class="ctools-use-modal ctools-modal-log_in" title="">Log In</a> here. </div> </div> </div> </div> </div> Gold Thu, 19 Jan 2017 22:20:00 +0000 41501 at http://hydraulicspneumatics.com Hydraulic Cylinders Keep Their Cool http://hydraulicspneumatics.com/cylinders-actuators/hydraulic-cylinders-keep-their-cool <div class="field-byline"> Alan Hitchcox </div> <div class="field-deck"> Intense heat is often the Achilles heel of any form of power transmission unless special provisions are made. </div> <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="http://hydraulicspneumatics.com/datasheet/hydraulic-cylinders-keep-their-cool-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/06/28/2-Milwaukee-Vulcan-sample.jpg" style="width: 595px; height: 444px;" title="Milwaukee Cylinder’s Vulcan Series is a collection of options designed to allow a cylinder to operate at higher temperatures or in high ambient temperature environments. Options range from heat-tolerant seals to water-cooled bearings and water cooled-cylinder jackets." /></p> <p>Hydraulic cylinders often operate under conditions that would quickly destroy other methods of linear motion. Dirt, water, wide temperature variations, and shock loading usually pose no serious threat. Intense, heat, however, is often the Achilles heel of any form of power transmission unless special provisions are made.</p> <p>For example, sometimes an extra-long piston rod or mechanical linkage can be specified to locate the cylinder away from the source of heat. Heat deflectors or thermal insulation may also be used to shield the cylinder from extremely hot ambient conditions. And even though it adds complexity to the system, using a fan to circulate cooling air around a cylinder makes its ambient environment more hospitable.</p> <div class="related-content"> <div class="related-label">Related Content</div> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/troubleshooting-challenge-drill-rig-s-top-drive-drops-uncontrollably">Troubleshooting Challenge: Drill Rig&rsquo;s Top Drive Drops Uncontrollably</a></p> <p><a href="http://hydraulicspneumatics.com/news/hydraulic-cylinder-market-slated-growth-through-2020">Hydraulic-Cylinder Market Slated for Growth through 2020</a></p> <p><a href="http://hydraulicspneumatics.com/blog/why-accurate-failure-analysis-very-important">Why Accurate Failure Analysis Is VERY Important</a></p> </div> <p>Even though hydraulic cylinders typically are expected to operate continuously in ambient temperatures that can well exceed 100&deg; F, sometimes solutions such as these still are not practical. So how hot is too hot? Temperatures higher than 180&deg; F are especially harmful to hydraulic fluid and seals.</p> <p><strong>Taking the Heat</strong></p> <p>Temperatures this high can quickly degrade hydraulic fluid, reducing its effectiveness as a lubricant. Moreover, excessive heat causes oxidation of the fluid, forming sludge and varnish&mdash;contaminants generated by the fluid itself. High temperature also accelerates seal degradation, resulting in loss of resilience and resistance to tearing. These conditions not only lead to leakage, but seal fragments become contaminants within the hydraulic fluid. Of course, premature seal degradation can usually be avoided by specifying a seal material that designed to operate in higher temperatures. For example, ethylene propylene and Viton seals usually accommodate temperatures exceeding 350&deg; F.</p> <p>Fortunately, most cylinders don&rsquo;t have to operate under conditions this extreme. But when they do, <a href="http://milwaukeecylinder.com/">Milwaukee Cylinder</a>, Cudahy, Wis., offers its <a href="http://milwaukeecylinder.com/vulcan.asp">Vulcan Series</a> of standard and custom water-cooled cylinders. The cylinders contain a cooling jacket in which coolant circulates to maintain reasonable temperatures. Cooling the cylinder barrel, though, may not be enough. Therefore, Milwaukee Cylinder also offers cooling jackets for rod bushings, which provide cooling primarily for the rod bearing and rod seal. This solution proves especially useful if the piston rod is exposed to extreme heat while it is extended. When the rod retracts, it becomes a heat source within the cylinder.</p> <p>Water-cooled cylinders rely on a source of cooling water that absorbs the ambient heat energy and moves this energy away from the cylinder, protecting the cylinder components from exposure to high temperatures. The term, water, though, is a bit of a misnomer. &nbsp;Instead, any of several industrial coolants are used that are not corrosive and that have better heat transfer properties.</p> <p>The operation of the cylinder should also be considered in these situations. You must account for heat exposure to the rod while the rod is extended. Ideally, the rod should remain in its retracted state, protected by the coolant, and then extend for only short periods of time. A reflective high-temperature boot could also be used in this scenario to help deflect radiant heat from being absorbed in the rod.</p> <p><em>Information for this article&nbsp;was provided by Douglas Lucina, Global Marketing &amp; Engineering Leader at Milwaukee Cylinder. For more information, call (414) 769-9700 or visit <a href="http://milwaukeecylinder.com/">milwaukeecylinder.com</a>.</em></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="http://hydraulicspneumatics.com/datasheet/hydraulic-cylinders-keep-their-cool-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><a href="http://sourceesb.com/" target="_blank"><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/06/28/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 595px; height: 46px;" /></a></p> </div> http://hydraulicspneumatics.com/cylinders-actuators/hydraulic-cylinders-keep-their-cool#comments Cylinders & Actuators Hydraulic Pumps & Motors Thu, 19 Jan 2017 22:04:00 +0000 41491 at http://hydraulicspneumatics.com Robot-Like Cleaner Uses Pneumatics to Scale Large Surfaces http://hydraulicspneumatics.com/pneumatic-valves/robot-cleaner-uses-pneumatics-scale-large-surfaces <div class="field-byline"> Alan Hitchcox </div> <div class="field-deck"> Designing a remote-controlled, pneumatic cleaner that can travel upside down as well as along the sides of huge ships takes rethinking design parameters and the right components. </div> <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="http://hydraulicspneumatics.com/datasheet/robot-cleaner-uses-pneumatics-scale-large-surfaces-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/06/28/Kama-image-1.jpg" style="width: 595px; height: 335px;" title="Kamat’s SHC 3000 ship hull cleaner comes with a protective aluminum cage as well as safety cables for additional personnel protection. " /></p> <p>Automated cleaning and paint removal for ship hulls and tanks has always been a tough job. Workers typically use high-pressure nozzles operating at 3,000 bar (43,500 psig) to blast sea life and debris from hull surfaces. Maintenance crews either have to erect scaffolding&mdash;moving the structure as cleaning progresses&mdash;or use lift trucks and aerial lifts to do the job. The project is labor-intensive, requiring multiple people to work long hours. And the cost to maintain or rent all this equipment can cut deep into a company&rsquo;s profits.</p> <div class="related-content"> <div class="related-label">Related Content</div> <p><a href="http://hydraulicspneumatics.com/hydraulic-filters/cleaner-fluid-boosts-steel-mill-uptime">Cleaner Fluid Boosts Steel Mill Uptime</a></p> <p><a href="http://hydraulicspneumatics.com/blog/one-thing-you-must-check-next-time-you-change-hydraulic-hose">One Thing You Must Check The Next Time You Change A Hydraulic Hose</a></p> <p><a href="http://hydraulicspneumatics.com/cylinders-actuators/all-stainless-air-cylinders-are-ideal-washdown-applications">All-Stainless Air Cylinders Are Ideal for Washdown Applications</a></p> </div> <p>To alleviate the risks to human safety and high maintenance costs, Kamat GmbH &amp; Co., Witten, Germany, has developed the pneumatic Ship Hull Crawler (SHC 3000), intended for cleaning and removing marine debris, paint, and rust from ships, tanks, and other large steel structures prior to preparing surfaces to resist biofouling&mdash;the accumulation of algae, mussels, worms, and other sea organisms that settle on ship&rsquo;s hulls over time.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/06/28/Kamat-image-2.jpg" style="font-size: 12.8px; width: 595px; height: 361px;" title="This photo shows the two track drives the SHC 3000 uses to maneuver along a ship’s hull while cleaning. " /></p> <p>Biofouling affects the ship in two important ways. When sea organisms adhere to the hull of the ship, the surface becomes rough, which increases drag and, ultimately, fuel consumption. Even using conventional labor-intensive techniques pays big dividends because cleaning a ship&rsquo;s hull can slash energy consumption by 40%. This cost savings is why shipping companies regularly pay large sums to have tankers and container ships cleaned. The second concern is the danger of corrosion on the hull, which increases from the environment generated by the biofilm that settles on the ship&rsquo;s outer shell.</p> <p><strong>Driven by Pneumatics</strong></p> <p>The SHC 3000 uses <a href="http://www.kamat.de/?id=248">high-pressure guns</a> equipped with <a href="http://www.kamat.de/?id=254">rotating nozzles</a> for quick and versatile cleaning of surfaces. It is housed in an aluminum frame, and the swivel nozzle assembly can be removed and used on its own for small jobs or for working in confined spaces. The swivel assembly is rotated by an air motor to provide high-pressure cleaning of large areas. The rotational speed of the air motor is controlled proportionally to achieve optimum cleaning effectiveness.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/06/28/Kamat-image-3-.jpg" style="margin: 5px; font-size: 12.8px; width: 300px; height: 368px; float: left;" title="The SHC 3000 is easily controlled remotely using a user-friendly joystick design. " />The crawler itself is held securely against the ship&rsquo;s hull or other steel surface by four rows of strong magnets positioned close to but not touching the steel surface. This is important because reaction forces from the high-pressure water jets would act to push the machine away from the surface.</p> <p>The crawler also uses pneumatic motors to move around the steel surface through a crawler drive&mdash;similar to what is used in skid-steer loaders. Each of two pneumatic motors drives a sprocket that engages a plastic-coated chain. Each chain is driven independently in either direction. Turning is accomplished by driving one motor faster than the other, and the crawler can even rotate on its own axis by driving one motor forward and the other backward.</p> <p>Direction and speed of each motor is controlled proportionally by a 5/3 way, normally closed valve, specifically, Festo&rsquo;s <a href="https://www.festo.com/cat/en-gb_gb/data/doc_ENGB/PDF/EN/MPYE_EN.PDF">MPYE-5-178HF-010-B</a>. Speed can be controlled from 0 to 4.5 m/min (0 to 14.8 ft/min), and a higher speed range 0 to 9 m/min (29.5 ft/min) is offered by Kamat as an option. Because the crawler operates via remote control, the user is at a safe distance from the working area.</p> <p>Although the crawler is designed to move over relatively smooth surfaces, it can negotiate obstacles like high welds and <img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/06/28/Kamat-image-4.jpg" style="margin: 5px; font-size: 12.8px; width: 200px; height: 356px; float: right;" title="A pair of Festo MPYE 5/3 normally closed proportional valves vary air motor speed to produce track drive speeds from 0 to 4.5 m/min (0 to 9.0 m/min as option)." />uneven plate connections. And because it does not depend on a vacuum to adhere to the surface (unlike other devices used for this purpose), the crawler can move over holes and perforated surfaces. It can also reach over the end of a surface (for example, at the upper railing of a ship). The crawler can also move over curved surfaces having a radius of 1 m or more. This lets the SHC 3000 move vertically down a hull to where it becomes upside down. Steel guide ropes provide an additional safeguard to prevent the crawler from falling off of surfaces.</p> <p>Another optional feature is an external vacuum device to remove debris by suction. Other options include an external power supply, cable reels that connect to the power supply as well as the remote control console, and adapters for cable extensions if needed.</p> <p>Kamat found pneumatics the most practical solution for the SHC 3000. The air motors provide a smaller and lighter solution than electric motors, overcome the concern of heat buildup, and eliminate the potential hazard of high-voltage power lines in wet working environments. A pneumatic air supply is easily accommodated simply renting a mobile air compressor.</p> <p><em>For more information&nbsp;on the SHC 3000 and other products and services offered by Kamat, visit <a href="http://www.kamat.de/">www.KAMAT.de</a>.</em></p> <p>&nbsp;</p> <p><em><a href="http://sourceesb.com/" target="_blank"><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/06/28/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 595px; height: 46px;" /></a></em></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="http://hydraulicspneumatics.com/datasheet/robot-cleaner-uses-pneumatics-scale-large-surfaces-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <div>&nbsp;</div> </div> http://hydraulicspneumatics.com/pneumatic-valves/robot-cleaner-uses-pneumatics-scale-large-surfaces#comments Marine & Offshore Pneumatic Valves Thu, 19 Jan 2017 21:38:00 +0000 41481 at http://hydraulicspneumatics.com Pneumatic Brakes Rival Hydraulics http://hydraulicspneumatics.com/other-components/pneumatic-brakes-rival-hydraulics <div class="field-deck"> An intensifier supplies a pneumatic brake with high pressure, boosting power density to that of its hydraulic counterparts. </div> <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/pneumatic-brakes-rival-hydraulics-pdf-download">Download this article in .PDF format</a><br /> This file type includes high-resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/LEAD-IMAGE.jpg" style="width: 595px; height: 495px;" title="All types of industrial machines, such as this multi-axis machining center, can benefit from the high-pressure capability, compact design, and safety of hydraulics using the convenience of pneumatics by incorporating Mayr’s Roba-guidestop brake." /></p> <p>One of the most fundamental reasons why designers choose hydraulics or pneumatics over electromechanical power transmission is power density. Both forms of fluid power can transmit higher force and velocity from a comparable actuator that is much smaller and lighter than anything offered by electromechanical technology. And because heat generation limits duty cycles of electric motors, fluid power solutions (especially pneumatics) generally can operate continuously at high cycle rates.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/hydraulic-valves/10-essential-pneumatic-safety-product">10 Essential Pneumatic Safety Products</a></p> <p><a href="http://http://hydraulicspneumatics.com/news/aem-continues-review-ag-braking-requirements">AEM Continues Review of ag Braking Requirements</a></p> <p><a href="http://hydraulicspneumatics.com/reservoirs-amp-accessories/separator-keeps-air-out-braking-systems">Separator Keeps Air Out of Braking Systems</a></p> </div> <p>Hydraulics is usually considered the ultimate in high power density. That&rsquo;s because fluid pressures typically measured in thousands of psi transmit extremely high force and torque from actuators only a fraction the size of their electromechanical counterparts. Pneumatic actuators, on the other hand, usually operate at much lower pressures&mdash;generally 100 psi or less.</p> <p>But this doesn&rsquo;t have to be the case. A circuit requiring a small volume of high-pressure air is well-served by an intensifier&mdash;often called a <em>booster</em>. Air boosters take advantage of the area differential of two different-sized pistons to compress air to a higher pressure.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/airBooster.gif" style="width: 595px; height: 305px;" title="One type of air booster shows how pressure can be increased (doubled, in this case) by using two pressure chambers. Using a smaller bore in the secondary chamber makes it possible to boost output pressure even higher." /></p> <p>In ideal terms, the combination of pressure and volume of a gas remains constant if temperature also remains constant, widely known as Boyle&rsquo;s law:</p> <p><em>P</em><sub>1</sub> &times; <em>V</em><sub>2</sub> = <em>P</em><sub>1</sub> &times; <em>V</em><sub>2</sub>&nbsp;</p> <p>where:</p> <p><em>P</em><sub>1</sub> is incoming pressure of the air,</p> <p><em>V</em><sub>1</sub> is incoming volume of the air,</p> <p><em>P</em><sub>2</sub> is outgoing pressure of the air, and</p> <p><em>V</em><sub>2</sub> is outgoing volume of the air.</p> <p>Because volume and pressure are inversely proportional in this case (at least ideally), boosting the pressure of a volume of compressed air decreases its volume. Also, because no mechanical device is 100% efficient, the volume of outgoing air will be less than the ideal value derived from Boyle&rsquo;s law.</p> <p><strong>Pressure Booster Is the Driving Force</strong></p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/Mayr-Fig-1.jpg" style="width: 300px; height: 472px; float: right;" title="The spring-applied, pneumatically released Roba-guidestop brake comes with a rigid support structure designed to be used with a variety of standard linear guide rails." />By integrating a pressure booster in with its compact safety brake, <a href="http://www.mayrcorp.com" target="_blank">Mayr GmbH &amp; Co.</a>, Mauerstetten, Germany, produced a spring-applied, pneumatically released brake with the high power density normally associated with hydraulics. Called the Roba-guidestop profiled rail brake, the device fulfills the ever-increasing safety requirements placed on machine builders.</p> <p>Mayr also offers spring-applied, hydraulically released brakes, so if a machine has an existing hydraulic system, it can tap into that. If not, designers can specify the Roba-guidestop as a convenient and cost-effective solution for applications that have access to shop air.</p> <p>Roba-guidestop safety brakes clamp onto standard profiled rails and provide backlash-free operation. Compressed air at 20 to 30 bar (290 to 435 psig) opens the clamp to release the brake. When compressed air is exhausted&mdash;either intentionally or from a machine malfunction&mdash;a powerful spring closes the clamp to securely grip the rail.</p> <p>To achieve a high-enough pressure to overcome spring force, a compact pressure booster is used in combination with the brake to multiply inlet air pressure about five times the 4 to 6 bar (58 to 87 psig) typically found in pneumatic systems&mdash;with no need for an auxiliary power source. The design selectively increases pressure directly upstream of the brake, which minimizes the length of the required high-pressure lines.</p> <p>The Roba-guidestop safety brake comes in five different sizes&mdash;each size in both a standard design and compact, short design&mdash;covering a range of holding forces from 1 to 34 kN (225 to 7,640 lb). Each brake is compatible with different profiles and sizes of conventional linear guide rails.</p> <p>As with its hydraulic brake design, Mayr&rsquo;s pneumatic Roba-guidestop safety brake remains structurally rigid and mounts directly to the load, allowing it to apply&nbsp; braking force directly to the linear guide rail. Safety is a clear advantage to this technique, especially concerning gravity-loaded axes, which otherwise presents potential risk to personnel.</p> <p>The Roba-guidestop eliminates the need for drive elements between the motor and the moving mass&mdash;such as spindles, spindle nuts, shaft couplings, and gearboxes&mdash; that could potentially sacrifice safety. Machines using Roba-guidestop safety brakes, therefore, provide significantly higher rigidity than systems using rotary brakes integrated into servomotors.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/Optional-Mayr-Fig-2.jpg" style="width: 595px; height: 329px;" title="A compact pressure booster provides high pressure to release a powerful spring-applied brake, providing failsafe operation with no need for external power to securely hold a load in place." /></p> <p>The backlash-free clamping of the Roba-guidestop directly onto the profile rail provides additional advantages. The high rigidity of the rail axis maximizes process accuracy to improve machine performance, especially in applications involving heavy loading. The rigid structure also transmits less vibration, which improves surface quality of work pieces.</p> <p>If an axis is stationary when machining or other operations occur, the brake can absorb the load. Instead of relying on drive motors to hold the axis steady, the closed brake absorbs axial forces and consumes no energy. This eliminates control movements and reduces vibration transmitted to the ball-screw spindle, which extends service life and maintenance intervals of the drive components.</p> <p><em>Mayr power transmission products are available in the U.S. at Mayr Corp., Waldwick, N. J., and from distributors across the country. For more information, call (201) 445-7210, or visit <a href="http://www.mayrcorp.com/" target="_blank">www.mayrcorp.com</a>.</em></p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> </div> http://hydraulicspneumatics.com/other-components/pneumatic-brakes-rival-hydraulics#comments Other Technologies Other Components Wed, 18 Jan 2017 14:40:00 +0000 41461 at http://hydraulicspneumatics.com Troubleshooting Challenge: Drill Rig’s Top Drive Drops Uncontrollably http://hydraulicspneumatics.com/hydraulic-pumps-motors/troubleshooting-challenge-drill-rig-s-top-drive-drops-uncontrollably <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/troubleshooting-challenge-drill-rig-s-top-drive-drops-uncontrollably-pdf-download">Download this article in .PDF format</a><br /> This file type includes high-resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p>A 65-ft.-high drill rig, mounted on a freshwater barge, was allowing its top drive head to drop uncontrollably. The circuit controlling this function shows <em>(see illustration)</em> both a brake (counterbalance) valve and a hydraulically controlled mechanical brake on the hoist function. The systems&rsquo; power unit was mounted close to the deck, with its <em>A</em> and <em>B</em> line hoses going up to top drive&rsquo;s hydraulic motor. The brake and shuttle valve were plumbed close to the motor, which lifted and lowered the drill drive head.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/community/troubleshooting-challenge-drilling-barge-steering-instability-problem">Troubleshooting Challenge: Drilling Barge with Steering Instability Problem</a></p> <p><a href="http://hydraulicspneumatics.com/cylinders-actuators/troubleshooting-challenge-cylinder-chatter-evades-solution">Troubleshooting Challenge: Cylinder Chatter Evades Solution</a></p> <p><a href="hhttp://hydraulicspneumatics.com/hydraulic-valves/troubleshooting-challenge-regenerative-circuit-not-working-molding-machine">Troubleshooting Challenge: Regenerative Circuit Not Working on a Molding Machine</a></p> </div> <p>When the operator first started the unit and commanded the top drive head to be lowered, it dropped uncontrollably, damaging the drill bit or buckling the drill string (pipe). The operator also heard a &ldquo;ratcheting noise,&rdquo; as if the mechanical brakes were attempting to grab. This problem also occurred after the hoist was raised and locked into place with the mechanical brake, and not operated for about an hour.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/0117_HP_Troubleshooting_Fig-.gif" style="width: 400px; height: 541px;" /></p> <p>The operator found that he could raise the top drive head first and then command it to lower, and it seemed to work okay, but it started jerking for a few seconds. No oil leaks were visible in any of the plumbing from the motor down to the directional valve. What do you think was causing the erratic operation?</p> <p><strong>Find the Solution</strong></p> <p>Think you know the answer to this month&rsquo;s problem? Submit your solution by emailing <a href="mailto:rjsheaf@cfc-solar.com">rjsheaf@cfc-solar.com</a>. All correct solutions submitted by Feb. 3, 2017, will be entered into a random drawing for a $50 gift card. The winner will be notified, and his or her name will be printed in a future issue. Only one gift card will be awarded to any participant within a calendar year.</p> <p>Congratulations to John Janesko, of Beckwood Press Co., St Louis, who correctly answered last month&rsquo;s puzzle. A $50 gift card is in the mail to him.</p> <p><strong>Solution to Last Month&rsquo;s Challenge: </strong><a href="http://hydraulicspneumatics.com/community/troubleshooting-challenge-drilling-barge-steering-instability-problem" target="_blank"><strong>Drilling Barge Has Unstable Steering Problem</strong></a></p> <p>The barge steering system that moved as water currents changed should have maintained its position when using Sun Hydraulics&rsquo; counterbalance valves. However, choosing a proportional valve with a blocked center spool was the source of the problem.</p> <p>Because sliding spools typically have their pressure port exposed to <em>A</em> and <em>B</em> ports, leakage to these ports usually builds to roughly half of system pressure. With both <em>A</em> and <em>B</em> ports pressurized, the external signal lines to the counterbalance valves cause the valves to open, allowing the cylinder to float in either direction.</p> <p>The solution called for using a float-center proportional valve, which allows both <em>A</em> and <em>B</em> ports to drain to tank to keep the Sun counterbalance valves closed.</p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> </div> http://hydraulicspneumatics.com/hydraulic-pumps-motors/troubleshooting-challenge-drill-rig-s-top-drive-drops-uncontrollably#comments Marine & Offshore Hydraulic Pumps & Motors Tue, 17 Jan 2017 21:44:00 +0000 41441 at http://hydraulicspneumatics.com Motores Hidráulicos Levantan Compuertas en Represa Mexicana http://hydraulicspneumatics.com/blog/motores-hidr-ulicos-levantan-compuertas-en-represa-mexicana <div class="node-body blog-body"><p class="rtejustify"><a href="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Three-men.jpg" target="_self"><img alt="" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Three-men.jpg" style="width: 550px; height: 391px; margin: 10px;" title="Figura 1: Empleados de Bosch Rexroth (de izquierda a derecha) Manuel Schuhmann, Martín Gómez y Abraham Huerta parados frente a las compuertas modernizadas para mostrar la escala." /></a></p> <p class="rtejustify">Una gr&uacute;a con un gran plato de hierro en su gancho se alza en la estructura de la represa en al lago Nezahualc&oacute;yotl del sur de M&eacute;xico. El operador lo&nbsp;baja con cuidado hacia el lago en frente a una de las compuertas de aliviadero en la represa. La masa de agua empuja al plato contra la pared de concreto a medida que el plato desciende lentamente, cerrando la apertura. La compuerta de aliviadero entonces se abre, permitiendo que el agua entre &eacute;sta y el plato se drene. &Eacute;sta compuerta, que generalmente evita que la represa se sobrellene, se encuentra seca, de manera que los trabajadores inspeccionen el &aacute;rea.</p> <p class="rtejustify">Manuel Schuhmann, gerente t&eacute;cnico de Bosch Rexroth se muestra con entusiasmo: &ldquo;es fascinante: el plato, o como com&uacute;nmente lo llaman tap&oacute;n, se mantiene en posici&oacute;n &uacute;nicamente a trav&eacute;s de la presi&oacute;n del agua.&rdquo; La tarea de los ingenieros es la de modernizar los accionamientos antiguos de las compuertas de aliviadero.</p> <p class="rtejustify"><strong>Innovaci&oacute;n Cuidadosa</strong></p> <p class="rtejustify">Construida entre 1958 y 1966, la represa de 138 metros, oficialmente llamada la represa Nezahualc&oacute;yotl, retiene a un lago con m&aacute;s de 10 millones de metros c&uacute;bicos de agua y una superficie de 110 km cuadrados. La misma protege a las tierras bajas del Estado Federal de Tabasco contra inundaciones y tambi&eacute;n contiene seis turbinas que generan potencia para la regi&oacute;n.</p> <p class="rtejustify">La Comisi&oacute;n Federal de Electricidad (CFE) opera la represa e invierte regularmente en su seguridad y en la operatividad del equipo t&eacute;cnico. El a&ntilde;o pasado, la Comisi&oacute;n decidi&oacute; modernizar tres de las siete compuertas, las cuales regulan el nivel de agua del reservorio. Cada compuerta ten&iacute;a un motor el&eacute;ctrico accionando dos ruedas con pi&ntilde;&oacute;n a trav&eacute;s de un eje. El motor levantaba las compuertas de 170 toneladas utilizando cadenas a cada lado desde que la represa entr&oacute; en operaci&oacute;n en los 60.</p> <p class="rtejustify">Mart&iacute;n G&oacute;mez, gerente de proyecto en Bosch Rexroth M&eacute;xico, recuerda la invitaci&oacute;n de la CFE para participar en la licitaci&oacute;n de este proyecto: &ldquo;inicialmente propusimos una soluci&oacute;n con cilindros de carrera larga accionando las compuertas.&rdquo; El equipo ya hab&iacute;a utilizado este tipo de accionamientos en construcciones nuevas muchas veces &ndash; como por ejemplo en la represa La Yesca, tambi&eacute;n en M&eacute;xico. Sin embargo, la estructura de concreto de la represa de Malpaso result&oacute; inapropiada.</p> <p class="rtejustify">Sin refuerzo, la pared no soportaba la fuerza de los cilindros. Y el cambiar la estructura hubiese resultado un proceso largo y complejo. &ldquo;Por eso desarrollamos una soluci&oacute;n utilizando el sistema de cadenas existente&rdquo; explica G&oacute;mez, &ldquo;pero con todas las ventajas de la hidr&aacute;ulica.&rdquo; Schuhmann agrega: &ldquo;en construcciones de acero para ingenier&iacute;a hidr&aacute;ulica, el factor m&aacute;s importante es la seguridad. Cuando podemos mostrar que sistemas hidr&aacute;ulicos similares ya estaban siendo utilizados en otras represas con &eacute;xito, nos ganamos el contrato.&rdquo;</p> <p class="rtejustify"><a href="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Direct-drive.jpg" target="_self"><img alt="" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Direct-drive.jpg" style="width: 550px; height: 367px; margin: 10px;" title="Figura 2: Un motor de pistones radiales Hägglunds acciona la cadena de la compuerta con acople directo. El arranque suave del motor extiende la vida útil de la cadena significativamente." /></a></p> <p class="rtejustify"><strong>Seguridad Primero</strong></p> <p class="rtejustify">La soluci&oacute;n de Malpaso consiste en una unidad de potencia hidr&aacute;ulica permanentemente instalada en cada compuerta. Cada unidad acciona dos motores H&auml;gglunds , que son motores de pistones radiales de alto torque y baja velocidad. Estos motores de la l&iacute;nea de Bosch Rexroth, reemplazan al accionamiento mec&aacute;nico y accionan las ruedas dentadas de las cadenas directamente. G&oacute;mez explica, &ldquo;el sistema hidr&aacute;ulico cuenta con protecci&oacute;n natural de sobrecarga. Por ejemplo, si un tronco se queda atascado en la compuerta y la carga de la cadena excede el m&aacute;ximo calculado, la v&aacute;lvula de alivio disipa la carga para evitar da&ntilde;os al accionamiento. Este escenario causar&iacute;a un da&ntilde;o en un accionamiento mec&aacute;nico. Nuestra soluci&oacute;n hidr&aacute;ulica claramente presenta una ventaja en seguridad.&rdquo;</p> <p class="rtejustify">Como una medida de seguridad adicional, &nbsp;los ingenieros de Bosch Rexroth montaron un freno de disco accionado por un resorte y de liberaci&oacute;n por presi&oacute;n en cada motor. Este freno permite la operaci&oacute;n del sistema siempre y cuando est&eacute; presurizado. Si la presi&oacute;n cae por cualquier raz&oacute;n, el mismo cierra autom&aacute;ticamente con suficiente fuerza para aguantar las compuertas. Esto asegura que se mantenga el control de las compuertas incluso en casos de falla el&eacute;ctrica.</p> <p class="rtejustify"><a href="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/HPU.jpg" target="_self"><img alt="" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/HPU.jpg" style="width: 550px; height: 266px; margin: 10px;" title="Figura 3: Los cuartos de las unidades de potencia tienen aire acondicionado para protegerlas de las condiciones cálidas y húmedas del lugar." /></a></p> <p class="rtejustify"><strong>Suave con las Cadenas</strong></p> <p class="rtejustify">El nuevo accionamiento hidr&aacute;ulico tambi&eacute;n protege las cadenas. El accionamiento electromec&aacute;nico generaba un movimiento con saltos al arranque que halaba y empujaba las cadenas antes de moverse. Esto no solamente generaba esfuerzos en los eslabones, sino tambi&eacute;n en las partes mec&aacute;nicas involucradas, requiriendo de un servicio frecuente. &ldquo;El accionamiento hidr&aacute;ulico, por otra parte, arranca suave y va tensando la cadena paulatinamente&rdquo; dice G&oacute;mez. &ldquo;Esto reduce considerablemente la necesidad de efectuar labores de mantenimiento.&rdquo;</p> <p class="rtejustify">Bosch Rexroth no solamente se encarg&oacute; de la ingenier&iacute;a e instalaci&oacute;n, sino tambi&eacute;n del control el&eacute;ctrico, incluyendo la programaci&oacute;n del software. Schuhmann explica, &uml;cada unidad de potencia tiene su propio sistema de control. Los operadores tambi&eacute;n cuentan con la opci&oacute;n de controlar las tres desde un panel. Convenientemente, el operador puede hacer ajustes en la pantalla t&aacute;ctil para abrir el desag&uuml;e un metro, por ejemplo.&rdquo; Comparado al sistema de botones y palancas, esto representa una gran mejora en cuanto a facilidad de uso. El factor decisivo sin embargo, yace en lo siguiente: el desag&uuml;e ahora transmite data de posici&oacute;n para indicar si est&aacute; cerrada o si est&aacute; abierta a cierto grado. Tambi&eacute;n transmite temperatura y presi&oacute;n de agua.</p> <p class="rtejustify">Los ingenieros de Bosch Rexroth trabajaron por tres meses y completaron el proyecto en Junio de 2015 donde la gr&uacute;a levant&oacute; los platos de hierro. Tres de las compuertas de toma ahora cuentan con accionamientos nuevos y seguros y el trabajo inici&oacute; en las otras cuatro. Schuhmann agrega, &ldquo;ya tenemos solicitudes de India, donde quieren saber m&aacute;s sobre el sistema de accionamiento hidr&aacute;ulico con cadenas. Esto se pudiese convertir en la soluci&oacute;n est&aacute;ndar para reemplazos!.&rdquo;</p> <p><em>Para mayor informaci&oacute;n sobre la l&iacute;nea de productos de Bosch Rexroth, visite nuestra p&aacute;gina web en <a href="http://www.eemtechnologies.com">www.eemtechnologies.com</a>, o cont&aacute;ctenos a <a href="mailto:info@eemtechnologies.com?subject=Solicitud%20Bosch%20Rexroth">info@eemtechnologies.com</a>, +1(855)462-7633.</em></p> <p class="rtejustify">&nbsp;</p> </div> http://hydraulicspneumatics.com/blog/motores-hidr-ulicos-levantan-compuertas-en-represa-mexicana#comments Other Industries Hydraulic Pumps & Motors H&amp;P en tu idioma! Sun, 15 Jan 2017 14:00:00 +0000 41431 at http://hydraulicspneumatics.com Educational Opportunities Abound at IFPE Conference (.PDF Download) http://hydraulicspneumatics.com/datasheet/educational-opportunities-abound-ifpe-conference-pdf-download <div class="node-body datasheet-body"><p>Taking place March 7-11 at the Las Vegas Convention Center, the International Fluid Power Expo (IFPE) will offer educational opportunities targeting multiple areas of the industry. In addition to keynote and plenary sessions...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> <div class="gatedLogin well"> <div class="contentPadding clearfix"> <h2>Register for Complete Access (Valid Email Required)</h2> <p><p><img height="auto" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/10/SALARY_SURVEY_HPcover.jpg" width="100%" />By registering on Hydraulics &amp; Pneumatics now, you&#39;ll not only gain access to , you&#39;ll also receive a complimentary copy of <em>Hydraulics &amp; Pneumatics 2016 Salary &amp; Career Report</em>.</p> </p> <div class="gatedLoginButtons gated-register-button"> <div class="button-region"> <a href="/penton_ur/nojs/user/register?source=gated&nid=41421&regmode=1" class="ctools-use-modal btn btn-branded btn-wide ctools-modal-register" title="Register at this site.">Register</a> </div> <div class="loginLinkText"> Already registered? <a href="/penton_ur/nojs/login" class="ctools-use-modal ctools-modal-log_in" title="">Log In</a> here. </div> </div> </div> </div> </div> Gold Fri, 13 Jan 2017 15:12:00 +0000 41421 at http://hydraulicspneumatics.com Hydraulic-Cylinder Market Slated for Growth through 2020 http://hydraulicspneumatics.com/news/hydraulic-cylinder-market-slated-growth-through-2020 <div class="node-body article-body"><p><a href="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/global_hydraulic_cylinder_market_20162020.jpg"><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/global_hydraulic_cylinder_market_20162020.jpg" style="width: 233px; height: 312px; float: right; margin-left: 4px; margin-right: 4px;" /></a></p> <p>A report from <a href="http://www.researchandmarkets.com/" target="_blank">Research and Markets</a> predicts growth in the global hydraulic cylinder market at a compound annual growth rate (CAGR) of 4.39% over the projected period of&nbsp;2016 to 2020. Steady growth is attributed to continuous demand from agriculture, construction equipment, mining equipment, material-handling equipment, industrial equipment, aerospace, and defense sectors.&nbsp;</p> <p>In the report, &quot;<a data-include="300390123" href="http://www.researchandmarkets.com/research/8b23n9/global_hydraulic" rel="nofollow" target="_blank">Global Hydraulic Cylinder Market 2016-2020</a>&quot;, Research and Markets identifies&nbsp;major drivers influencing market growth. They note a rising&nbsp;popularity of&nbsp;integrated solution and services, where all components of a hydraulic system including the hydraulic cylinder, valve, and pump, are sold as a single unit or kit. A&nbsp;focus on integrated solutions allows vendors to improve their&nbsp;profitability in maintenance and aftermarket services, in addition to strengthening their relations with clients.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/blog/troubleshooting-tales-squealing-hydraulic-cylinders">Troubleshooting Tales: Squealing Hydraulic Cylinders </a></p> <p><a href="http://hydraulicspneumatics.com/cylinders-actuators/troubleshooting-challenge-cylinder-chatter-evades-solution">Troubleshooting Challenge: Cylinder Chatter Evades Solution</a></p> <p><a href="http://hydraulicspneumatics.com/news/des-case-acquires-oilmiser-product-line">Des-Case Acquires OilMiser Product Line </a></p> </div> <p>With predictions that the population will expand to nine-billion by&nbsp;2050,&nbsp;the&nbsp;agriculture&nbsp;industry is slated to grow with a&nbsp;3.61%&nbsp;CAGR.&nbsp;The&nbsp;report identifies the rising demand for food and fiber&nbsp;as another driving factor for growth in the hydraulic-cylinder market, especially as more agricultural processes become mechanized.&nbsp;</p> <p>The report also discusses challenges faced by vendors and the hydraulic cylinder market. One challenge is the&nbsp;limitations in repair and servicing of hydraulic cylinders that undergo failures due to noise, high fluid temperatures, and slowed operations.&nbsp;</p> <p>The report divides the market into three regions: Americas; Asia-Pacific; and Europe, the Middle East, and Africa. It is prepared based on market analysis and inputs from industry experts. Key vendors for the forecast period are B<a href="https://www.boschrexroth.com/en/us/" target="_blank">osch Rexroth</a>,&nbsp;<a href="http://www.eaton.com/Eaton/ProductsServices/Hydraulics/Cylinders/index.htm" target="_blank">Eaton</a>,&nbsp;<a href="http://www.hydac-na.com/sites/hydac-na/Pages/CatalogItem.aspx?Item=Cylinders&amp;Source=/sites/hydac-na/pages/thank-you.aspx" target="_blank">HYDAC</a>,&nbsp;<a href="http://www.parker.com/portal/site/PARKER/menuitem.223a4a3cce02eb6315731910237ad1ca/?vgnextoid=714bcab60275e210VgnVCM10000048021dacRCRD&amp;vgnextfmt=EN" target="_blank">Parker Hannifin</a>, and&nbsp;<a href="https://www.weber-hydraulik.com/en/produkte/hydraulic-cylinders/" target="_blank">Weber-Hydraulik</a>.&nbsp;</p> <div class="captioned-image caption-none" style="overflow: hidden; width: 595px;"><em style="color: rgb(51, 51, 51); font-family: Georgia, Times, &quot;Times New Roman&quot;, serif; font-size: 15px;"><a href="http://sourceesb.com/" style="color: rgb(14, 95, 139);" target="_blank"><img alt="" src="http://machinedesign.com/site-files/machinedesign.com/files/SourceESB_Lookin_For_Parts_Banner.jpg" style="display: block; width: 595px; height: 46px;" /></a></em></div> </div> http://hydraulicspneumatics.com/news/hydraulic-cylinder-market-slated-growth-through-2020#comments News Fri, 13 Jan 2017 14:51:00 +0000 41411 at http://hydraulicspneumatics.com JFPS International Symposium http://hydraulicspneumatics.com/jfps-international-symposium <div class="node-body event-body"></div> <h3 class="location-locations-header">Location</h3> <div class="location-locations-wrapper"> <div class="location vcard"> <div class="adr"> <span class="fn">ACROS Fukuoka and Fukuoka Institute of Technology</span> <div class="street-address"> 1-1-1 Tenjin Chuo-ku </div> <span class="locality">Fukuoka City</span> <span class="postal-code">810-0001</span> <div class="country-name">Japan</div> </div> </div> </div> <div class="field-desc"> <div class="node-body article-body"> <p>The <strong><a href="http://www.jfps.jp/net/10thjfps/" target="_blank">Japanese Fluid Power System Society</a></strong> (JFPS) is hosting the 10th JFPS International Symposium on Fluid Power Oct. 24-27, 2017. The conference will be held in Fukuoka, Japan, at the ACROS Fukuoka and Fukuoka Institute of Technology, close to Fukuoka International Airport.</p> <p>Kazushi Sanada, Professor, Yokohama National University and General Chairperson of JFPS 2017, says the main theme of the symposium is &ldquo;Innovation of Fluid Power for the Future.&rdquo; The symposium will address current research trends on oil hydraulics, pneumatics, water hydraulics, and functional fluids.</p> <p>A welcome party after registration will occur on Oct. 24. Academic sessions and social events are planned for the next three days. Poster sessions will provide a valuable forum for exchanging ideas and opinions with fluid power professionals from all over the world. Organized and poster sessions will provide a valuable forum of exchanging ideas and opinions with fluid power friends coming from all over the world. Exhibits of fluid power are also on tap to emphasize industrial applications.</p> <p>Online abstract submission is now open for applicants, with a deadline of Jan. 31. Applicants will be notified of acceptance on March 31, and the deadline for submitting finished papers is June 1.</p> <p><strong><a href="http://www.jfps.jp/net/10thjfps/05.html" target="_blank">Click here</a></strong> for details on submitting an abstract, or go to <strong><a href="http://www.jfps.jp/net/10thjfps/" target="_blank">www.jfps.jp/net/10thjfps</a></strong> to visit the home page.</p> </div> </div> http://hydraulicspneumatics.com/jfps-international-symposium#comments Fri, 13 Jan 2017 14:28:00 +0000 41401 at http://hydraulicspneumatics.com Hydraulic-Electric Analogies: Transmission Comparisons, Part 2 http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electric-analogies-transmission-comparisons-part-2 <div class="field-deck"> From the point of view of hydrostatic transmission, pumps and motors are essentially the same machine. </div> <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/hydraulic-electric-analogies-transmission-comparisons-part-2-pdf-download">Download this article in .PDF format</a><br /> This file type includes high-resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p>Continuing the discussion from the last installment of &ldquo;Motion Control,&rdquo; internal leakage is not the only loss in the pump. There are technical frictional losses as well. These are symbolized algebraically with <em>R<sub>fw</sub></em>, meaning &ldquo;friction and windage,&rdquo; an ages-old term for the analogous frictional losses in electrical motors and generators.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electrical-analogies-transmission-comparisons-part-1">Hydraulic-Electrical Analogies: Transmission Comparisons, Part 1</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-valves/hydraulic-electric-analogies-conditioners">Hydraulic-Electric Analogies: Conditioners</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-filters/hydraulic-electric-analogies-fluid-and-electronic-filters">Hydraulic-Electric Analogies: Fluid and Electronic Filters</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electric-analogies-power-conditioning">Hydraulic-Electric Analogies: Power Conditioning</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electric-analogies-stepper-motors">Hydraulic-Electric Analogies: Stepper Motors</a></p> </div> <p>In summary, <em>Fig. 3</em> consists of two ideal elements: one for the torque generator on the input (mechanical) side and the ideal pumping element on the hydraulic side. The Morse-code outline shows the boundaries of the pump and represents the case of the pump housing that captures internal leakage. Three parasitic resistance loss coefficients account for the three distinct internal leakage paths, and the pump of <em>Fig. 3</em> is equipped with a case drain.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/0117_HP_Motion_Ctrl_F3.gif" style="width: 595px; height: 479px;" title="3. Two-port characterization of the Type-2 variable-displacement pump incorporates the loss elements made up of mechanical friction and internal leak paths, of which there are three. A fifth hydraulic port is labeled CD, for case-drain port." /></p> <p>However, some explanation is needed regarding the two small, white-filled triangles in the vicinity of the pump&rsquo;s case-drain port. One indicates fluid carried away from the common node between <em>R<sub>LACD</sub></em> and <em>R<sub>LBCD</sub></em> and into the pump&rsquo;s housing. Some pressure builds, and when an external path is provided at the case-drain port, the component of internal leakage flows back to the tank.</p> <p>If the case-drain port is blocked, the case internal pressure will rise. It may reach 50% of the outlet pressure, because the only relief is through the restriction at <em>R<sub>LBCD</sub></em>. The high case pressure will demand a sturdy pump housing and a high-pressure shaft seal.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/0117_HP_Motion_Ctrl_F4.gif" style="width: 595px; height: 398px;" title="4. The analytical schematic for the Type-1 motor is the mirror image of that for the Type-1 pump." /></p> <p>If the case-drain port is blocked, or if it doesn&rsquo;t exist, then all of the previously mentioned limitations exist. More importantly, though, the three separate internal leakage resistances will combine to form a new, single, port-to-port leakage resistance in schematic form. The new, simplified analytical schematic is shown in <em>Fig. 5</em>.</p> <p><strong>Hydraulic Motors</strong></p> <p>The reality is that hydraulic pumps and motors are essentially the same machines, especially in the hydrostatic transmission. In some applications, the pump and motor are forever exchanging roles. When accelerating, a pump is a pump and a motor is a motor. But when decelerating (especially if the loads have significant inertia), the motor absorbs mechanical energy from that stored in the spinning inertia, which is transmitted to the pump as hydraulic energy, turning the pump into a motor.</p> <p>chanical power that comes out of the pump shaft is transmitted mechanically to the prime mover. If the prime mover is an electric motor, it converts the mechanical power into electrical power and transfers it to the power grid to be used elsewhere. This is an example of an efficient, fully energy-regenerative system. More will be discussed later about this phenomenon in the next installment of &ldquo;Motion Control.&rdquo;</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/0117_HP_Motion_Ctrl_F5.gif" style="width: 595px; height: 391px;" title="5. The Type-1 hydraulic pump analytical schematic has a mechanical circuit like the Type-2 pump. However, there is only one leakage resistance, RLPP." /></p> <p>For now, it should be apparent that the similarity between a pump and a motor should result in analytical schematics that are similar. Indeed, that is exactly the case. The analytical schematic is essentially the mirror image of the pump. <em>Figures 4 and 6</em> are the analytical schematics for Type-1 and Type-2 hydraulic motors. They should be compared to <em>Figures 3 and 5</em>. The significant difference between a pump and a motor is the direction of energy flow.</p> <p>An important aim of this discussion is to show how the ideal pump and motor serve as a basis for depicting and explaining hydromechanical energy conversion, as well as providing the fundamental principles of that energetic process. Plus, it is a relatively simple matter to add the energy-loss elements of fluid friction (internal leakage paths, created by necessary clearances and a provider of internal lubrication) and mechanical friction (unavoidable in the real world) to create a schematic representation of more practical machines that have less than 100% efficiency. The analytical schematics account for these losses; they also show how the leakage paths exist within the machine and how they must be treated to make the machine free of external leakage.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2017/01/13/0117_HP_Motion_Ctrl_F6.gif" style="width: 595px; height: 391px;" title="6. Just as with the Type-1 motor, the Type-2 motor is the mirror image of the Type-2 pump. In this figure, though, the shaft seal is shown schematically." /></p> <p>A hydraulic machine, say a motor, works like this: If a flow source is connected to the motor, the immediate reaction is that the pressure rises because the motor is not moving. However, in a few milliseconds, it rises enough to overcome the friction, and the motor and its load accelerate. Speed continues to increase until all of the flow goes into the motor&rsquo;s internal displacement chambers, at which time the motor has reached its steady-state speed. That is, the pump output flow and the motor input flow are balanced and equal.</p> <p>The motor&rsquo;s speed is controlled by the output flow from the pump. If pump flow increases due to greater displacement or input speed, the pump output flow increases, and the motor will accelerate. This is one of the most fundamental principles of hydraulic machines. Moreover, in every pump there&rsquo;s a motor, and in every motor there&rsquo;s a pump.</p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> </div> http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electric-analogies-transmission-comparisons-part-2#comments Hydraulic Pumps & Motors Fri, 13 Jan 2017 14:18:00 +0000 41381 at http://hydraulicspneumatics.com Educational Opportunities Abound at IFPE Conference http://hydraulicspneumatics.com/news/educational-opportunities-abound-ifpe-conference <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/educational-opportunities-abound-ifpe-conference-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="Fig. 1" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/IMG_0330_0.jpg" style="font-size: 12.8px; width: 595px; height: 397px;" title="Keynote speakers at this year’s show will focus on energy-saving methods and future small systems useful for robotics and automation." /></p> <p>Taking place March 7-11 at the Las Vegas Convention Center, the<a href="http://www.ifpe.com/" target="_blank">&nbsp;International Fluid Power Expo (IFPE)</a>&nbsp;will offer&nbsp;educational opportunities targeting multiple areas of the industry. In addition to keynote and plenary sessions, college-level courses and seminars will start the day before the conference.&nbsp;On March 6 and 7, four courses will cover the fundamentals of electrohydraulic&nbsp;systems, the basics of hydraulic fluids, hydraulic-system designs for mobile applications, and more advanced electrohydraulic systems.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/heat-exchangers/first-look-3d-printed-excavator-headline-ifpe-2017">First Look: 3D-Printed Excavator to Headline IFPE 2017</a></p> <p><a href="http://hydraulicspneumatics.com/blog/driver-s-seat">In the Driver&rsquo;s Seat</a></p> <p><a href="http://hydraulicspneumatics.com/ifpe-2017-conexpoconagg">Events: IFPE 2017 &amp; ConExpo/ConAgg</a></p> </div> <p>The Energy Efficient Hydraulics and Pneumatics Conference, to be led by three&nbsp;fluid power organizations, will kick off the first day of the conference, with keynote and plenary sessions beginning Wednesday, March 8. On&nbsp;Friday, Future Outlook presentations will explore fluid power in small-scale robotics, small integrated systems, and soft robotics and prostheses.&nbsp;</p> <p>College courses are priced at $250. Full Session Passes cost&nbsp;$375, and include&nbsp;any sessions from Wednesday through Friday within the Energy Efficient Hydraulics and Pneumatics Conference. The&nbsp;$175 Session Day Pass includes any sessions on a selected day (Wednesday, Thursday, or Friday) within the aforementioned conference.</p> <p>More information about educational opportunities at&nbsp;IFPE&nbsp;is listed below, and additional details can be found&nbsp;<a href="http://www.ifpe.com/visit/education/" target="_blank">here</a>.&nbsp;</p> <h3><img alt="Fig. 2" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/IFPE-2017-logo.gif" style="margin: 5px; font-size: 12.8px; width: 120px; height: 196px; float: left;" />College-Level Courses</h3> <p>IFPE&rsquo;s college-level courses offer hands-on technical knowledge on the effective use of hydraulics in mobile equipment. These half-day courses will benefit practicing engineers and others involved in design and manufacturing processes. Sessions will be held March 6 and 7 in the South Hall of the Las Vegas Convention Center.</p> <p><strong><u>Monday, March 6</u></strong></p> <p><strong>Fundamentals of Electrohydraulic Systems&mdash;<u>8:00 a.m. to 12:00 p.m.</u></strong></p> <p>This presentation is intended to increase awareness of the fundamental concepts of fluid power technology. The presentation covers some rules of physics about fluid pressure and flow, followed by discussion into the generic structure of a hydraulic system in addition to the construction and principle of operation of main components such as pumps, motors, valves, cylinders, and rotary actuators. The lecture concludes by detailing how to grab all of these components in the form of a system that works safely and efficiently.</p> <p><em>Presenter: Dr. Medhat Khalil, director of professional education, Milwaukee School of Engineering</em></p> <p><strong>Cost: $250</strong></p> <p><strong>Hydraulic Fluid Properties, Efficiency, and Contamination Control&mdash;<u>1:00 to 5:00 p.m.</u></strong></p> <p>Participants will learn about the composition of oils, properties of lubricants, and how hydraulic fluids can affect machine performance. Conventional, multi-grade, synthetic, and biodegradable fluids will be discussed.&nbsp;It will present research studies examining fluid-efficiency effects in hydraulic motors, piston, and gear pumps, and outline the principles of oil analysis and filter selection. The seminar concludes with case studies that demonstrate how filter debris analysis can be used to troubleshoot hydraulic-system contamination control problems.&nbsp;</p> <p><em>Presenter: Paul Michael, research chemist, Milwaukee School of Engineering</em></p> <p><strong>Cost: $250</strong></p> <p><strong><u>Tuesday, March 7</u></strong></p> <p><strong>Hydraulic System Design Strategies for Mobile Applications&mdash;<u>8:00 a.m. to 12:00 p.m</u></strong></p> <p>This course is divided into four different topics:</p> <p><strong>1. Developing Motion Control Training Strategies for Your Workforce</strong></p> <p>This presentation explores the breadth of the motion control industry, identifies technology trends, and develops a strategy to fill the knowledge gap of stakeholders. Everyone from end-users and maintenance technicians to system designers are challenged with producing results in a changing technology climate. Managers are faced with expensive and time-consuming options to develop skilled human resources. This session will help identify the appropriate strategy for subject-matter experts to efficiently develop critical skills needed in our industry.</p> <p><em>Presenter: Bogdan Kozul, technical training manager, Parker Hannifin Corp.</em></p> <p><strong>2. Leveraging Internet of Things (IoT) in Mobile Hydraulics</strong></p> <p>This session will explore the impact of the Internet of Things (IoT), intelligent components, and component connectivity on mobile hydraulics. What does it mean to OEMs, dealers, and end-users? How does it impact today&rsquo;s equipment? What can we expect in the near future? How will IoT open new revenue streams and services? This may be the most exciting technology shift in the mobile hydraulics field in years&mdash;do you understand how IoT will affect your business? Are you ready to talk about SaaS (software as a service), cloud connectivity, gateways, connected components, data security, telematics, remote monitoring, or mobile applications? Is it time to leverage IoT into your equipment and solutions?</p> <p><em>Presenter: Art Donaldson, business unit manager, IoT and connectivity, Parker Hannifin Corp., Hydraulics Group</em></p> <p><strong>3. Global Shield Coating: Improved Corrosion Resistance for Critical Equipment</strong></p> <p>This presentation provides an overview of Parker Hannifin&rsquo;s Global Shield coating, which is a high-performance coating that provides high corrosion and wear resistance to extend the service life of critical equipment. Discussed will be the internal and independent testing that was conducted, which reveals how the coating fared versus other common coatings. This session will also deliver general information about the characteristics of the coating and current applications.</p> <p><em>Presenter: Michael Sell, product manager, Parker Hannifin Corp., Cylinder Div.</em></p> <p><strong>4. Electro Hydrostatic Actuation&mdash;Highly Efficient Implement Solution with Energy Recovery</strong></p> <p>Many next-generation off-road machines reduce energy loss and improve productivity by incorporating hybrid electric approaches with energy storage. An efficient implementation of a hybrid electric approach is essential to achieve maximum improvement potential. This presentation will introduce electrohydrostatic actuation outlining basic operation, highlighting unique characteristics, and comparing benefits with alternative approaches. A summary of test results from application experience will be included.</p> <p><em>Presenter: Dale Vanderlaan, senior program manager, Parker Hannifin Corp.</em></p> <p><strong>Cost for all four parts: $250</strong></p> <p><strong>Electrohydraulic System Design and Control&mdash;<u>1:00 to 5:00 p.m.</u></strong></p> <p>State-of-the-art hydraulic drives have reached the same automation level as their electromechanical brethren. The evolution of IoT (Industry 4.0) did not stop in front of hydraulics. Come along for a user journey presenting the potential of state-of-the-art technologies such as electrohydraulic drives, simulation, and IoT technologies:<br /> <strong>&bull;</strong> Design&mdash;Consideration and system configuration for electrohydraulic systems<br /> <strong>&bull; </strong>Validate&mdash;Model-based engineering and electrohydraulic system simulation<br /> <strong>&bull; </strong>Connect&mdash;The potential of connected hydraulics<br /> <strong>&bull; </strong>Data Sources&mdash;Dedicated sensors; drive systems as &ldquo;virtual&rdquo; sensors (computed); sensor nodes</p> <p>The characteristics and advantages of these new approaches will be presented and proven by some live demonstrations.</p> <p><em>Presenters: Janette Kothe, technical sales support&mdash;Industry 4.0, Bosch Rexroth Corp. and Michael Liedhegener, manager, Simulation Group, Technical Sales, Bosch Rexroth Corp.</em></p> <p><strong>Cost: $250</strong></p> <p><strong>Energy Efficient Hydraulics and Pneumatics Conference</strong></p> <p><img alt="Fig. 3" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/New_FPDA.JPG" style="width: 250px; height: 74px; margin: 5px; float: left;" />Proper design concepts are critical to developing efficient fluid power systems, and the diagnostic and maintenance techniques are essential to keep those systems operating at peak efficiency. These concepts and techniques can result in significant energy savings for companies that use hydraulics or pneumatics, as well as the customers they serve, making fluid power a more competitive technology choice. To help companies take advantage of these opportunities, three leading fluid power organizations&mdash;the <a href="http://www.ifps.org" target="_blank">International Fluid Power Society</a>, the <a href="http://www.fpda.org" target="_blank">FPDA Motion and Control Network</a>, and the <a href="http://www.nfpa.com" target="_blank">National Fluid Power Association</a>&mdash;will be hosting an educational conference at IFPE 2017. Professionals responsible for designing or maintaining hydraulic and pneumatic systems in mobile or stationary equipment should plan to attend.</p> <p><img alt="Fig. 4" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/IFPS-logo.gif" style="width: 150px; height: 146px; margin: 5px; float: left;" /></p> <p><strong>Keynote and Plenary Sessions</strong></p> <p><strong><u>Wednesday, March 8</u></strong></p> <p><strong>Keynote:</strong></p> <p><strong>Methodologies to Improve Energy Efficiency in Fluid Power&mdash;<u>12:00 to 1:00 p.m.</u></strong></p> <p>The keynote will highlight the trends sweeping through mobile and industrial applications in efforts to improve system productivity and overall efficiency.&nbsp;Speaker Chris Schottler will provide an overview on how machines can be optimized at the system and component level to improve hydraulic efficiency, offering examples to illustrate his points. He will also share highlights of different technologies and architectures that are currently improving system efficiency, or will in the future.</p> <p><em>Presented by Chris Schottler, engineering manager, Advanced Technology, Eaton Corp.</em></p> <p><strong>Hydraulics:</strong></p> <p><strong>Using Electronics to Improve Efficiency and Productivity&mdash;<u>1:15 to 1:40 p.m.</u></strong></p> <p>Embedded Electronics is more than a way to perform late differentiation on assembly lines and fine tuning in the field. Every year, microcontrollers get smaller and smaller while their power keeps increasing. Sequential management of the task is no more the main expectation; vehicles are deciding how they have to accommodate all of the parameters and real-time values to perform as expected with a minimum use of energy and noise generation. Sensors, development methods, standards, and technology are pushing engineers on a continuous improvement path to give end-users the best performance with the optimal use of all the components of their machines. These aspects will be reviewed during the session.</p> <p><em>Presented by Cedric Magnien, systems, electronics, and vehicle integration manager, Poclain Hydraulics</em></p> <p><strong>Pneumatics:</strong></p> <p><strong>ISO Standards for Energy and Power Loss in Fluid Power Components and Systems&mdash;<u>1:15 to 1:40 p.m.</u></strong></p> <p>The electrical industry has power ratings for every motor, transformer, and light bulb. Such is not the case for the fluid power industry, which also lacks standards for measuring power consumption. It is underway, though: ISO Technical committee 131 for fluid power is developing standards that provide methods to measure the power consumption of fluid power components and systems.</p> <p>This presentation describes how the basic energy equation, taught in the first course of fluid mechanics, can be used to develop equations to measure the power consumption of fluid power components. Examples of power consumption in hydraulic filters, hydraulic valves, and pneumatic valves are shown. In addition, there&rsquo;s a demonstration of how the thermodynamic concept of available energy is applied to analyze the energy efficiency of a pneumatic system.</p> <p>Measuring power consumption is important. If we conclude that the level of energy consumed by our components is too high, we will inevitably make improvements to the products, or make recommendations on their application. But, how will we know if we are successful unless we have standards to measure the improvements?</p> <p><em>Presented by John Berninger, retired global engineering manager, Parker Hannifin Corp.</em></p> <p><strong>Hydraulics:</strong></p> <p><strong>Harmonizing Your Electro-Hydraulic Solutions&mdash;<u>1:45 to 2:10 p.m.</u></strong></p> <p>As changes in mobile-system technology advance the hydraulics industry toward the &ldquo;electronification&rdquo; of machines, there can be challenges in understanding what approach to take to provide reliable, safe, and repeatable functionality of the machine. This session offers insight into overcoming those challenges by asking the right questions when applying electrohydraulic solutions, ensuring that electronics and hydraulics complement each other on the machine.</p> <p><em>Presented by Terry Hershberger, director, sales, product management, mobile applications, Bosch Rexroth Corp.</em></p> <p><strong>Pneumatics:</strong></p> <p><strong>The Impact of Modern Controls in Production Processes - Compressed Air System Energy Efficiency&mdash;<u>1:45 to 2:15 p.m.</u></strong></p> <p>When someone in the air-compressor field talks of pneumatic controls, the immediate thought is the proper operation of air-compressor capacity controls integrated with an effective central control system. This is important, because it&rsquo;s the only way that less compressed air used in the production process areas can translate into reduced input energy. More often than not, though, we see many processes and air-using machinery not taking advantage of modern, more-advanced control technology&mdash;which can significantly lower a plant&rsquo;s overall power consumption. This is particularly applicable to operations such as packaging machines, dust collectors, blow-off operations, air-operated pumps, vacuum generators, palletizers, and cabinet coolers.</p> <p><em>Presented by Hank Van Ormer, owner, Van Ormer Consulting Inc.</em></p> <p><img alt="Fig. 5" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/IMG_1000.jpg" style="font-size: 12.8px; width: 595px; height: 372px;" title="IFPE will also be a place for professionals to exchange ideas and hold conversations after sessions." /></p> <p><strong>Hydraulics:</strong></p> <p><strong>Traction Control Methods: Different Ways to Improve Efficiency&mdash;2:15 to 2:45 p.m.</strong></p> <p>Hydrostatic transmissions provide flexibility in designing vehicle propulsion drives. Unlike mechanical transmissions, hydrostatic drives offer inherent differential torque and motion control. However, the different choices offered by this flexibility can complicate which features to adopt when traction control is required.</p> <p>Flow, pressure, and displacement controls can be considered, with some limitations regarding the specific applications requirements and hydrostatic technologies used. Those options will be reviewed during the session, with illustrations based on simulations and real&nbsp;cases.</p> <p><em>Presented by Jean Heren, platform business manager, Poclain Hydraulics</em></p> <p><strong>Pneumatics:</strong></p> <p><strong>Improving Manufacturing Processes and Air Efficiency with the Use of New Smart Pneumatic Technologies&mdash;<u>2:20 to 2:45 p.m.</u></strong></p> <p>The Industrial Internet of Things (IIoT) is transforming the factory floor. &nbsp;IIoT helps manufacturing companies boost asset utilization, save energy, provide better services, and improve quality. Smart pneumatics can play a key role in the Industrial Internet when networked manifolds are monitored to become a convenient data source. Big Data analytics use this pneumatic data to create actionable insights and keep plant personnel informed with web pages, dashboards, reports, and alerts that focus on machine productivity, predictive alerting, air usage, and energy consumption. An example solution presented in this session will illustrate a practical method that uses pneumatic data within the confines of the Industrial Internet of Things to benefit machine builders and manufacturers.</p> <p><em>Presented by Spencer Cramer, CEO, ei3 Corp.</em></p> <p><strong>Hydraulics:</strong></p> <p><strong>Increasing Energy Efficiency of an Industrial Hydraulic System&mdash;<u>3:00 to 4:00 p.m.</u></strong></p> <p>This session will examine some of the areas where hydraulic energy inefficiencies occur, and discuss key items for evaluating an industrial hydraulic system to determine recommendations to improve efficiency. Some specifics look at the sizing of prime movers, selection of fluid, contamination control, pump design, plus considerations for selecting electronic controls, valves, and actuators.&nbsp;</p> <p><em>Presented by Tom Blansett, consultant</em></p> <p><strong>Pneumatics:</strong></p> <p><strong>Energy Savings Opportunities for Pneumatic Systems&mdash;<u>3:00 to 4:00 p.m.</u></strong></p> <p>This course was developed for the benefit of plant managers, design engineers, and maintenance personnel who are concerned with, or responsible for, controlling the costs and environmental impact of excessive energy use in their given facility. Topics covered include establishing an energy-conservation program, monitoring flow and pressure, and identifying target areas for savings such as leak remediation, air blow optimization, excessive pressure and unregulated usage, intermittent demand and idle-mode savings, and energy-intensive usage of compressed air.</p> <p><em>Presented by Jon Jensen, energy conservation group manager, SMC Corp. of America</em></p> <p><strong><u>Thursday, March 9</u></strong></p> <p><strong>Keynote:</strong></p> <p><strong>Innovative Application of Energy Efficient Fluid Power&mdash;<u>12:00 to 1:00 p.m.</u></strong></p> <p>Fluid power does the work that transforms the world around us in factories, fields, and construction sites. With such an important role to play in developing our modern society, energy efficiency is always an important concern. In his keynote, Eric Bretey will give an overview of fluid power energy-consumption trends in the United States. He will also highlight current activities and advances in fluid power research, as well as share innovative technologies and applications that will shape how fluid power is utilized in future off-road machines.</p> <p><em>Presented by Eric Bretey, engineering manager, integrated solutions, Danfoss Power Solutions</em></p> <p><strong>Pneumatics:</strong></p> <p><strong>Energy Efficiency, Part 1: Corporate View&mdash;<u>1:15 to 1:45 p.m.</u></strong></p> <p>This case study examines&nbsp;how Frito-Lay&nbsp;views energy efficiency as it relates to compressed air. The presentation will cover the firm&rsquo;s corporate programs (compressed-air use tracking, electric efficiency scorecards, compressed-air leak repair, and compressed-air surveys), strategies for efficient operation of the compressed-air system (supply and demand side), and approaches to testing new compressed-air technologies. Also in the works will be an overview of several corporate-wide projects that have been executed.</p> <p><em>Presented by Bryan Seitz, sustainability associate principle engineer, Frito-Lay &ndash; HQ Supply Chain&nbsp;</em></p> <p><strong>Hydraulics:</strong></p> <p><strong>Assessing a Mobile Hydraulics System Design for Energy Efficiency&mdash;<u>1:15 to 2:00 p.m.</u></strong></p> <p>This session will look at some of Hydra Tech&rsquo;s hydraulic systems and show ways to cost-effectively improve efficiency. It will compare examples of traditional circuits and the company&rsquo;s improved circuit. Discussion also will surround how the actual placement of components and how the circuit is plumbed affect system efficiency and temperature.</p> <p><em>Presented by Ernie Parker, Hydra Tech Inc.</em></p> <p><strong>Pneumatics:</strong></p> <p><strong>Energy Efficiency, Part 2: Plant&mdash;<u>1:50 to 2:20 p.m.</u></strong></p> <p>Abstract not yet submitted.</p> <p><em>Presented by Sonny Martin, Frito-Lay</em></p> <p><strong>Hydraulics:</strong></p> <p><strong>Sensor Technology: Enabling Hydraulic Energy Efficiency and Performance&mdash;<u>2:05 to 2:50 p.m.</u></strong></p> <p>Built-in machine intelligence opens new opportunities for safe, clean, and efficient operation of hydraulic equipment. Pressure sensors in hydraulic and transmission systems enable surveillance and control of all vital processes to ensure maximum performance, reduce downtime, and improve fuel efficiency.&nbsp;</p> <p><em>Presented by Magnus Hansson, Danfoss Industrial Automation</em></p> <p><strong>Pneumatics:</strong></p> <p><strong>What We Did to Maximize Our Compressed Air System&mdash;<u>2:25 to 3:10 p.m.</u></strong></p> <p>This session details Continental Tire&rsquo;s success stories about how it reduced compressed-air generation costs and usage thanks to an energy-monitoring system; an aggressive air leak repair program; re-piping of an outgrown air-delivery system; and installing new compressors dryers, and controls.</p> <p><em>Presented by Don Grimes, energy supervisor, Continental Tire The Americas, LLC</em></p> <p><strong>Hydraulics:</strong></p> <p><strong>Transforming Fluid Power&mdash;<u>3:00 to 4:00 p.m.</u></strong></p> <p>We are about to enter a new era in the use of fluid power. To be successful in understanding the changes that are coming, we will need to rethink some of our most cherished notions about power transfer by fluids. Is &ldquo;Flow Means Go&rdquo; an accurate explanation of actuator velocity?</p> <p>Using the power formula, we will discover ways to control velocity without restrictive flow controls. We will learn how to allow an actuator to only draw the amount of power needed for the task at each moment. In addition, we will find we can use all the available energy in both gas charged and weighted accumulators while still controlling speed.</p> <p><em>Presented by Dan Helgerson, Perisseuma Energy</em></p> <p><strong>Pneumatics:</strong></p> <p><strong>Compressed Air Energy Cost Reduction at Briggs &amp; Stratton&mdash;<u>3:15 to 4:00 p.m.</u></strong></p> <p>Abstract not yet submitted.</p> <p><em>Presented by Jess Sumrall, Briggs &amp; Stratton</em></p> <p><strong><u>Friday, March 10</u></strong></p> <p><strong>Keynote:</strong></p> <p><strong>Opportunities and Challenges in Making Human Assist Fluid Power Systems Part of the Coming Robot Revolution&mdash;<u>12:00 to 1:00.</u></strong></p> <p>Automotive assembly lines with protected heavy-duty industrial robots have dominated the robotics arena. However, in the new paradigm, thanks to developments in vision systems and computational power smaller-scale robotics, opportunities are rapidly evolving to enhance and augment human endeavor. This presentation offers an overview of this evolution and discusses the technological merits of fluid power systems for robotics. Furthermore, it will discuss future developments and implications of human-centric robotics, which will provide context for remaining session presentations.</p> <p><em>Presented by Nic Copley, vice president&mdash;technology &amp; innovation, Parker Hannifin Corporation - Automation Group</em></p> <p><strong>Future Outlook:</strong></p> <p><strong>Design Guidelines for Compact, Integrated Fluid Power Systems&mdash;<u>1:15 to 1:40 p.m.</u></strong></p> <p>Fluid power on the small scale is more than simply shrinking large-scale components and systems. Modeling and simulation can be used to predict the size, weight, and efficiency of small-scale hydraulics being used to drive next-generation lightweight wearable robots. Along with describing guidelines to help the engineering designer optimize small-scale hydraulics, this presentation will describe a prototype hydraulic-powered, ankle-foot orthosis that has exceptional torque yet is still lightweight. It will also highlight where research and development is still needed in small-scale hydraulics.</p> <p><em>Presented by William Durfee, professor and director of design education, University of Minnesota Department of Mechanical Engineering</em></p> <p><strong>Future Outlook:</strong></p> <p><strong>Untethered Power Supplies&mdash;<u>1:45 to 2:15 p.m.</u></strong></p> <p>Compact and capable power supplies for untethered human-scale fluid power machines continue to be a challenge. As applications involving human-machine interaction motivate new collaborative and soft robot architectures, the source of power for these inevitably fluid-powered machines must be adequately energy-dense, as well as satisfy a number of challenging constraints. This talk will present recent progress made in untethered power supplies for the next generation of human-scale fluid power applications.</p> <p><em>Presented by Eric Barth, associate professor of mechanical engineering, Vanderbilt University</em></p> <p><strong>Future Outlook:</strong></p> <p><strong>Soft Robotics and FREEs&mdash;<u>2:20 to 2:45 p.m.</u></strong></p> <p>Inspired by the biology of flexible-yet-powerful organisms&mdash;such as the octopus and starfish, or tissue such as muscle&mdash;soft robotics replaces rigid and stiff actuators and structures with compliant fluid-filled designs. Popular McKibben actuators, or pneumatic artificial muscles, are one embodiment of Fiber Reinforced Elastomeric Enclosures (FREEs), which are constructed from a stretchy hollow elastomeric cylinder reinforced with helical fibers. By changing the angle of the fibers, FREE actuators can not only contract (such as with a McKibben muscle), but also extend, create torsion, or coil. This presentation will explore the use of FREEs to create robotic arms, powered orthotic devices, and exoskeletons.</p> <p><em>Presented by Liz Hsiao-Wecksler, associate head of undergraduate programs and professor, University of Illinois</em></p> <p><img alt="Fig. 6" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/IMG_1511.jpg" style="font-size: 12.8px; width: 595px; height: 397px;" title="Take notes! Attendees will have the opportunity to choose from a range of invaluable educational sessions at IFPE." /></p> <p><strong>Future Outlook:</strong></p> <p><strong>Noise, Vibration and Harshness: Sound Quality Issues in Hydraulics (Looking into the Future)&mdash;<u>2:50 to 3:15 p.m.</u></strong></p> <p>What should interactive robots sound like? The question bears on more than just the noise and vibration that robots may generate&mdash;it also concerns the intended use environment of such robots, and how humans may use auditory clues to sense the action of these robots. Use of robots in therapeutic settings poses its own challenge for low-noise requirements. Not only should the sounds they produce not be threatening to patients, they must provide sufficient auditory cues for enhanced situational awareness for their operators/collaborators.</p> <p><em>Presented by Ken Cunefare, professor, Georgia Institute of Technology</em></p> <p><strong>Future Outlook:</strong></p> <p><strong>Panel Discussion and Q&amp;A with the Audience&mdash;<u>3:20 to 4:05 p.m.</u></strong></p> <p><em>Participants include Eric Barth, associate professor of mechanical engineering, Vanderbilt University; Ken Cunefare, professor, Georgia Institute of Technology; Liz Hsiao-Wecksler, associate head of undergraduate programs and professor, University of Illinois; and William Durfee, professor and director of design education, University of Minnesota Department of Mechanical Engineering.</em></p> <p><strong>Single Day Pass: $175</strong>&mdash;Includes any sessions in a single day (Wednesday, Thursday, or Friday) within the Energy Efficient Hydraulics and Pneumatics Conference.</p> <p><strong>Full Conference Pass: $375</strong>&mdash;Includes any session from Wednesday through Friday within the Energy Efficient Hydraulics and Pneumatics Conference.</p> <div class="formulas" style="border-top:1px solid #000000; border-left:1px solid #000000; border-right:1px solid #000000;"> <h3>World Fluid Power Summit Convenes at IFPE</h3> </div> <div class="formulas" style="border:1px solid #000000;"> <p><img alt="Sidebar photo" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Intl_Summit.jpg" style="margin: 5px; font-size: 12.8px; width: 300px; height: 174px; float: left;" title="Attendees at IFPE should remember to register for the International Fluid Power Summit, which takes place on Thursday during the show. " />The National&nbsp;Fluid Power Association (NFPA) will host the World Fluid Power Summit during the conference. On Thursday, March 9, at noon, the summit will bring together fluid power professionals for information sharing and education. It will take place in the Las Vegas Convention Center and include lunch for all attendees. Industry and association leaders from around the world will attend and present the latest fluid power market trends in their home markets. Seating is limited and advanced registration is required. Contact <a href="mailto:elanke@nfpa.com">Eric Lanke</a>, NFPA president and CEO, for more information or to register.</p> <style type="text/css">.formulas {background-color:#CCFFFF; padding:10px; width:575px;} @media only screen and (max-width: 578px) { .formulas {width:95%;} } <style> </style> </style></div> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/educational-opportunities-abound-ifpe-conference-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> </div> http://hydraulicspneumatics.com/news/educational-opportunities-abound-ifpe-conference#comments News Thu, 12 Jan 2017 21:26:00 +0000 41271 at http://hydraulicspneumatics.com Courtesy of IFPE An Alternative to Displacement Controls http://hydraulicspneumatics.com/controls-instrumentation/alternative-displacement-controls <div class="field-byline"> James D. Van de Ven, University of Minnesota </div> <div class="field-deck"> Variable-displacement pumps have emerged as an energy-efficient means of matching hydraulic power transmission to a varying load. The latest method under evaluation is to use alternating-current hydraulics. </div> <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/alternative-displacement-controls-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="Fig. 1" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/0117_HP_AC_HydPump_F1.gif" style="width: 595px; height: 541px;" title="1. These illustrations depict alternating-flow (a) and standing-wave (b) classifications for ac fluid power. " /></p> <p>Displacement control in a hydraulic system often relies on the performance and efficiency of a variable-displacement pump across a wide range of displacements and pressures. For multi-actuator circuits, where multiple pumps are driven on a common shaft, the package size and weight of the pump are also important. Three architectures for producing positive-displacement pumps are commonly available with variable displacement: swash-plate axial piston, bent axis, and vane.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/blog/2-good-reasons-schedule-hydraulic-pump-change-outs">2 Good Reasons To SCHEDULE Hydraulic Pump Change-Outs</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/diagnose-pumps-your-smartphone">Diagnose Pumps with Your Smartphone</a></p> <p><a href="http://hydraulicspneumatics.com/blog/are-you-sure-your-hydraulic-pump-broken">Are You SURE Your Hydraulic Pump Is Broken?</a></p> </div> <p>Much work has been done to improve the efficiency of these three types of variable-displacement pumps. While efforts have enhanced overall maximum efficiency, the efficiency of conventional variable-displacement pumps is poor at low volumetric displacements because the largest energy losses do not scale with output power. In many applications, the pumps operate at low displacement for a large portion of the cycle, which results in significant energy loss.</p> <p>Additionally, these variable-displacement pumps typically have three times the mass and volume of a fixed-displacement gear pump of the same displacement. The most efficient architecture (the bent-axis unit) does not have a through shaft, which prevents stacked mounting on a common shaft driven by a prime mover. The second-most efficient architecture (the axial-piston unit) has an aspect ratio that is long axially, resulting in a long required packaging space for multiple units that are common-shaft mounted. These are the challenges that motivated the development of a more efficient variable-displacement pump with a form factor amenable to a common shaft.</p> <h3>Understanding AC Hydraulics</h3> <p>A novel ac hydraulics approach for power transmission is based on the theory originated by George Constantinesco, who formulated his ideas of sonics for the transmission of power through waves in liquids, solids, and gases. Typically, ac fluid power can be classified as an alternating flow or standing wave <em>(Figs. 1 and 2)</em>. In alternating flow, a periodically varying flow source with no net fluid flow is used to transmit power. In a standing-wave system, the forcing frequency and pipe wavelength are tuned such that reflections at the end of a pipe form standing pressure waves. The ac pump uses an alternating flow approach.</p> <p><img alt="Fig. 2" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/0117_HP_AC_HydPump_F2.gif" style="width: 595px; height: 438px;" title="2. This figure displays fractional displacement of an ac hydraulic pump as a function of the phase shift of the sinusoidal pistons." /></p> <p>The fundamental operational unit of the ac hydraulic pump can be visualized as two sinusoidally oscillating pistons of equal displacement, with a fluid conduit directly connecting the two cylinders. When the motion of the two pistons are in phase, the flow is combined. When the motion of the pistons are 180 deg. out of phase, they shuttle flow back and forth, resulting in zero output flow. Through variations of the phase shift between the pistons, the combined displacement is continuously variable (Fig. 2).</p> <p>The architecture for the ac pump involves the mating of two radial piston pumps <em>(Fig. 3)</em>, where pairs of cylinders between the pumps are connected and the inlet and outlet flows are controlled with check valves. The two pumps share a common shaft. The phase shift is created by rotating the case of one pump. While check valves were used in early experimental work, implementing active valves will allow full 4-quadrant pump/motor operation.</p> <p><img alt="Fig. 3" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/0117_HP_AC_HydPump_F3.gif" style="width: 595px; height: 344px;" title="3. The illustration shows an ac hydraulic pump formed from two radial piston pumps mounted to a common shaft. The phase shift is achieved by rotating the case of pump B by the angle φ." /></p> <p>With 4-quadrant operation, the input shaft will be loaded during pumping and absorb regenerative energy during motoring. The regenerative energy will be transferred through the common shaft to pumps driving other degrees-of-freedom, reducing the load on the prime mover and further improving system efficiency.</p> <p>Using the radial piston architecture for the ac pump provides a number of benefits. First, it is one of the highest-efficiency pump architectures available&mdash;requiring no port or swash plate. Another benefit is that the radial piston pump has a short axial package, which allows multiple units to be common-shaft mounted for a multi-actuator displacement control system <em>(Fig. 4)</em>.</p> <p><img alt="Fig. 4" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/0117_HP_AC_HydPump_F4.gif" style="width: 595px; height: 523px;" title="4. The radial piston pump has a short axial package, which creates a great potential for allowing multiple units to be common-shaft mounted for displacement control. " /></p> <p>Third, extremely high displacement density can be achieved in a radial pump by using a multi-lobe cam to create multiple pumping strokes per revolution. Not only does this improve compactness, but it also balances radial forces on the pump axle, which reduces the required bearing size and allows the displacement variation to be achieved with a small rotation angle of one pump case. Basically, ac hydraulic pump/motors can handle very high pressures and offer infinite variability.</p> <p>It is easy to see how variable-displacement pumps are a key component to eliminating metering valve control through displacement control. Yet, existing variable-displacement pump architectures are heavy, have poor efficiency at low displacements, and are axially long&mdash;making common-shaft mounting challenging.</p> <p>This is why ac hydraulic pump technology, which varies the flow rate by phase-shifting pairs of oscillating pistons, is a better choice. If you connect pairs of pistons of two radial piston pumps and phase-shift the case of one pump with respect to the other, it will vary the displacement. This result is a variable pump that is highly efficient, power dense, and axially short&mdash;allowing multiple pumps to be mounted on a common shaft.</p> <p><em>James D. Van de Ven is professor of mechanical engineering at the University of Minnesota. He acknowledges the contributions of Kim A. Stelson, University of Minnesota, and Eric J. Barth and Douglas E. Adam, both of Vanderbilt University, for their contributions to this discussion.</em></p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/alternative-displacement-controls-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> </div> http://hydraulicspneumatics.com/controls-instrumentation/alternative-displacement-controls#comments Controls & Instrumentation Hydraulic Pumps & Motors Wed, 11 Jan 2017 15:13:00 +0000 41351 at http://hydraulicspneumatics.com An Alternative to Displacement Controls (.PDF Download) http://hydraulicspneumatics.com/datasheet/alternative-displacement-controls-pdf-download <div class="node-body datasheet-body"><p>Displacement control in a hydraulic system often relies on the performance and efficiency of a variable-displacement pump across a wide range of displacements and pressures. For multi-actuator circuits, where multiple pumps are driven on a common shaft...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> <div class="gatedLogin well"> <div class="contentPadding clearfix"> <h2>Register for Complete Access (Valid Email Required)</h2> <p><p><img height="auto" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/10/SALARY_SURVEY_HPcover.jpg" width="100%" />By registering on Hydraulics &amp; Pneumatics now, you&#39;ll not only gain access to , you&#39;ll also receive a complimentary copy of <em>Hydraulics &amp; Pneumatics 2016 Salary &amp; Career Report</em>.</p> </p> <div class="gatedLoginButtons gated-register-button"> <div class="button-region"> <a href="/penton_ur/nojs/user/register?source=gated&nid=41361&regmode=1" class="ctools-use-modal btn btn-branded btn-wide ctools-modal-register" title="Register at this site.">Register</a> </div> <div class="loginLinkText"> Already registered? <a href="/penton_ur/nojs/login" class="ctools-use-modal ctools-modal-log_in" title="">Log In</a> here. </div> </div> </div> </div> </div> Gold Wed, 11 Jan 2017 15:07:00 +0000 41361 at http://hydraulicspneumatics.com 2017 Work Truck Show http://hydraulicspneumatics.com/2017-work-truck-show <div class="node-body event-body"></div> <h3 class="location-locations-header">Location</h3> <div class="location-locations-wrapper"> <div class="location vcard"> <div class="adr"> <span class="fn">Indiana Convention Center, Indianapolis, IN</span> <div class="street-address"> 100 South Capitol Ave. </div> <span class="locality">Indianapolis,</span>, <span class="region">IN</span> <span class="postal-code">46225</span> <div class="country-name">United States</div> <span class="geo"><abbr class="latitude" title="39.763971">39° 45' 50.2956" N</abbr>, <abbr class="longitude" title="-86.164375">86° 9' 51.75" W</abbr></span> </div> <div class="map-link"> <div class="location map-link">See map: <a href="http://maps.google.com?q=39.763971+-86.164375+%28100+South+Capitol+Ave.%2C+Indianapolis%2C%2C+IN%2C+46225%2C+us%29">Google Maps</a></div> </div> </div> </div> <div class="field-desc"> <p>North America&#39;s largest work truck event is your once-a-year chance to see all of the newest industry products, choose from dozens of industry-focused training courses, and gain access to technical engineering representatives from hundreds of exhibiting companies. Attendees can interact with thousands of industry professionals, set up meetings with current suppliers or customers; find solutions to resolve technical issues, and talk shop with industry peers at special events and receptions.<br /> The Show is the ultimate resource for industry professionals, offering the opportunity to:</p> <ul> <li><span style="line-height: 1.42857;">See the latest vocational truck and equipment displays, with product experts available at exhibitor booths&nbsp;</span></li> <li><span style="line-height: 1.42857;">Meet with current and prospective suppliers&nbsp;</span></li> <li><span style="line-height: 1.42857;">Find solutions to critical technical questions&nbsp;</span></li> <li><span style="line-height: 1.42857;">Interact with thousands of peers&nbsp;</span></li> <li><span style="line-height: 1.42857;">Gain insight into recent industry and market trends&nbsp;</span></li> </ul> <p><span>The Work Truck Show takes place March&nbsp;14&ndash;17, 2017 at the Indiana Convention Center in downtown Indianapolis. <a href="http://www.worktruckshow.com/WTS/Info_for_attendees/Scheduleofevents.aspx">Educational sessions</a> and the&nbsp;</span><span><a href="http://www.worktruckshow.com/WTS/GTS/GreenTruckSummit.aspx">Green Truck Summit</a> </span><span>begin March 14. The exhibit hall is open March 10:00 to 5:00 March 15 and 16, and 9:00 to 12:00 March 17.</span></p> <p><span>This trade show, produced by NTEA&mdash;the Association for the Work Truck Industry, is North America&rsquo;s largest gathering of vocational trucks and equipment from Classes 1&ndash;8, including chassis, bodies, components and accessories. With suppliers introducing new products and innovations in the exhibit hall, and thousands of decision-makers and industry professionals in attendance, this is the industry event of the year. View the&nbsp;</span><span><a href="http://wts17.mapyourshow.com/7_0/floorplan/?navbarlink=1" target="_blank">interactive floor plan</a></span><span>&nbsp;to see participating exhibitors and search products.</span></p> <p><span>Held in conjunction with The Work Truck Show, the <a href="http://www.worktruckshow.com/WTS/GTS/GreenTruckSummit.aspx">Green Truck Summit</a> delivers the latest on clean energy innovations for commercial vehicles. The Summit features top industry experts, government officials and early-adopter fleet managers sharing insights and lessons learned. Topics range from new productivity options and successful implementation of green technologies to regulatory and funding updates.</span></p> <p><span>Educational package registrants will have the opportunity to choose from Work Truck Show&nbsp;<strong>and</strong>&nbsp;Green Truck Summit&nbsp;<a href="http://www.worktruckshow.com/schedule">concurrent sessions</a></span><span>. Courses, led by industry and technical experts, cover:</span></p> <ul> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/Workforcedevelopment.aspx">Workforce development</a></li> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/Industrytrendsandforecasts.aspx">Industry trends and forecasts</a></li> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/Governmentregulatorycompliance.aspx">Government regulatory compliance</a></li> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/Riskmitigation.aspx">Risk mitigation</a></li> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/Truckspecificationanddesign.aspx">Truck specification and design</a></li> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/OEMchassisupdates.aspx">OEM chassis updates</a></li> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/Leanstrategies.aspx">Lean strategies</a> &nbsp;</li> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/Truckfleetoptimization.aspx">Truck fleet optimization</a></li> <li><a href="http://www.worktruckshow.com/WTS/educational_sessions/Fuelsavingtechnologiesandalternativefuels.aspx">Fuel-saving technologies and alternative fuels</a>&nbsp;</li> </ul> <p>&nbsp;</p> </div> http://hydraulicspneumatics.com/2017-work-truck-show#comments 39.763971 -86.164375 Wed, 04 Jan 2017 19:37:00 +0000 41341 at http://hydraulicspneumatics.com Why Accurate Failure Analysis Is VERY Important http://hydraulicspneumatics.com/blog/why-accurate-failure-analysis-very-important <div class="node-body blog-body"><p>As every hydraulics end-user who&#39;s been around for a while knows, hydraulic component manufacturers are notorious for the smoke and mirrors they use to deny warranty claims.<br /> <br /> Now, this is NOT to say all warranty claims are legitimate. In fact, it&#39;s very safe to say they&#39;re not. But when a hydraulic component fails prematurely, what IS needed is accurate information, i.e. better answers than &#39;it&#39;s contamination&#39;.<br /> <br /> And the reason why is illustrated by the following story about a client of mine who had suffered a series of failures involving a particular brand of radial piston motor. When he first went to the motor manufacturer about the problem - and to pursue a warranty claim, he was told the failures were caused by contamination. So no warranty.<br /> <br /> Not satisfied with this response, he got my books <a href="http://www.hydraulicsupermarket.com/track?p=handp&amp;w=isthsp"><strong>Insider Secrets to Hydraulics</strong></a> and <a href="http://www.hydraulicsupermarket.com/track?p=handp&amp;w=phfsp"><strong>Preventing Hydraulic Failures</strong></a>, and after studying them, conducted his own failure analysis. He came to the conclusion that the failures were nothing to do with the cleanliness (or otherwise) of the oil. So he went back to the motor manufacturer with his findings, and when pressed, the manufacturer agreed with his analysis - verbally at least. But still no warranty.<br /> <br /> Even though the motor manufacturer agreed with his (subsequently) informed analysis of the failures, they then advised him they were being caused by a flaw in the design of the machine&#39;s hydraulic circuit.<br /> <br /> But at this point, regardless of whether there was a problem with the circuit or not, this customer had a right to be upset with the motor manufacturer. Two reasons. The first is, contamination is the standard reason given by most pump and motor manufacturers to rid themselves of warranty claims. They know how hard it is to argue down, not least because when a pump or motor fails, there is almost always evidence of contamination damage - even though in the majority of cases the contamination has occurred after the fact, or is inconsequential to it.<br /> <br /> And in this case, because the motor manufacturer played their contamination ace card - instead of doing an open and honest investigation into the REAL cause of the failure, the circuit problem was not discovered until the customer conducted his own failure analysis AFTER subsequent failures had occurred. Not good. And very expensive for the end-user - it cost him a six-figure sum.<br /> <br /> My point is, hydraulics end-users don&#39;t necessarily need all their warranty claims accepted (although I&#39;m sure they&#39;d like that!). What they need is accurate information and better answers when things do go wrong. Because as this example illustrates, inaccurate or incomplete failure analysis can be very costly. And to discover six other costly mistakes you want to be sure to avoid with your hydraulic equipment, <a href="http://www.hydraulicsupermarket.com/track?p=handp&amp;w=smr"><strong>get &quot;Six Costly Mistakes Most Hydraulics Users Make... And How You Can Avoid Them!&quot; available for FREE download here</strong></a>.</p> </div> http://hydraulicspneumatics.com/blog/why-accurate-failure-analysis-very-important#comments Hydraulics At Work Tue, 03 Jan 2017 02:08:00 +0000 41331 at http://hydraulicspneumatics.com Dana Inc. Acquires Brevini Group Businesses http://hydraulicspneumatics.com/news/dana-inc-acquires-brevini-group-businesses <div class="field-deck"> Brevini Group, S.p.A. and Dana Incorporated have reached a definitive agreement for Dana to purchase 80% of Brevini’s Power Transmission and Fluid Power businesses. </div> <div class="node-body article-body"><p>Officials at <strong><a href="http://www.dana.com" target="_blank">Dana Inc.</a></strong>, Maumee, Ohio, recently announced the acquisition of Brevini&#39;s Fluid Power and Tranmission Groups of <strong><a href="http://www.brevini.com/en" target="_blank">Brevini </a></strong>SpA,&nbsp; Reggio Emilia The acquisition will immediately expand Dana&rsquo;s product portfolio with adjacent technologies and establish Dana as the only off-highway solutions provider that moves the equipment and performs its critical work functions. It adds technologies for tracked vehicles, and provides a platform of proven technologies that can be leveraged in Dana&rsquo;s light and commercial-vehicle end markets, helping to accelerate the company&rsquo;s hybridization and electrification initiatives.</p> <p>&ldquo;Our industry is going through a period of change,&rdquo; says Brevini President Renato Brevini. &ldquo;The combination of Brevini and Dana will create a formidable player in this dynamic market...Our customers and employees will find an ideal fit with Dana, a company that delivers true value through a commitment to innovation. Dana&rsquo;s global footprint, operational excellence, deep industry knowledge, and position as a top-tier supplier to manufacturers will raise the profile and market penetration of our products.&rdquo;</p> <p>Under the terms of the agreement, Dana plans to initially purchase an 80% share in the Brevini power transmission and fluid power businesses, with an option to purchase the remaining 20% share by 2020; the purchase does not include Brevini&rsquo;s wind power business. The purchase is subject to customary regulatory approvals, and it is expected to close in early 2017.</p> <p>Dana is a supplier of highly engineered drivetrain, sealing, and thermal-management technologies that improve the efficiency and performance of vehicles with both conventional and alternative-energy powertrains. Serving three primary markets&mdash; passenger vehicle, commercial truck, and off-highway equipment&mdash;Dana provides original equipment manufacturers and the aftermarket with local support for products and services through a network of nearly 100 engineering, manufacturing, and distribution facilities. Founded in 1904, the company employs more than 23,000 people in 25 countries on six continents. In 2015, Dana generated sales of nearly $6.1 billion.</p> <p>&ldquo;Brevini&rsquo;s product line is a perfect complement to Dana&rsquo;s current offerings, helping us to increase the amount of Dana content on construction, mining, material-handling, and other off-highway equipment,&rdquo; says Aziz Aghili, president of Dana Off-Highway Drivetrain Technologies. &ldquo;Brevini&rsquo;s technology portfolio will increase the number of patents and patents pending for Dana&rsquo;s off-highway business by 3%, enabling us to provide our customers with a full range of power-conveyance systems.&rdquo;</p> <p class="p p1">In a press conference,&nbsp; James Kamsickas, president and ceo of Dana Inc., added, &quot;We are happy to announce that Dana has entered into a definitive agreement to purchase the Power Transmission and Fluid Power businesses of the Brevini Group. This acquisition furthers our growth strategy by leveraging our core knowledge of off-highway markets and expands our market reach.&quot;</p> <p class="p p1">&quot;Brevini is a fantastic business with a long history and deep technological and market know-how. Brevini is a global leader in off-highway power conveyance systems. This acquisition will add about $400 million of annual sales to Dana&#39;s off-highway drive chain segment. The acquisition will immediately expand Dana&#39;s product portfolio with adjacent technologies that established Dana as the only solutions provider that can manage energy and power conveyance from the engine to the wheels and to machine work devices.</p> <p class="p p1">&quot;It adds technologies for tracked vehicles something that we do not do today, doubling our addressable market for the off-highway driveline systems. It also provides proven technologies that can be leveraged in Dana&#39;s light and commercial vehicle end markets, helping to accelerate the company&#39;s hybridization and electrification initiatives.</p> <p class="p p1">&quot;Currently, [our off-highway drive train business] engineers and manufactures axles, drive shafts, transmissions, and hybrid solutions for wheeled off-highway vehicles in multiple end markets in every regional world. The technologies we supply transfer the power from the engine and allow these wheeled vehicles to move. Brevini brings to Dana a different type of power conveyance technology.</p> <p class="p p1">Kamsickas outlined four fundamental technologies Brevini provides for off-highway vehicles: planetary hub drives,&nbsp; hydraulic systems and electronic controls to power equipment, engineered winch systems, and, to a lesser degree, gear boxes and systems for offshore equipment.</p> <p class="p p1">Kamsickas continued,&nbsp; &quot;Brevini&#39;s products fit perfectly with Dana&#39;s. Together, we can offer a full range of power conveyance systems with almost no product overlap. The addition of Brevini&#39;s planetary drive technology will allow Dana to enter the tracked vehicle drive train segment of all new commercial channel for us. In addition to opening up this new market, we can bring Brevini&#39;s other products&mdash;such as hydraulic systems and slew drives&mdash;to our core market of wheeled off-highway vehicles further expanding our content.&quot;</p> </div> http://hydraulicspneumatics.com/news/dana-inc-acquires-brevini-group-businesses#comments News Thu, 29 Dec 2016 22:08:00 +0000 41321 at http://hydraulicspneumatics.com <p>Rino&nbsp;Tarolli, left, of Dana Italy, and Renato Brevini, president of Brevini Group, congratulate each other over Dana&#39;s acquisition of Brevini&#39;s fluid power and power transmission businesses.</p> When a Sight Glass Isn’t Just a Sight Glass http://hydraulicspneumatics.com/controls-instrumentation/when-sight-glass-isn-t-just-sight-glass <div class="node-body article-body"><p><img alt="Fig. 1" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Des-Case-OSG_vertical.png" style="width: 595px; height: 461px;" title="The Des-Case oil sight glass has a white background to make it easier to view particulate and water contamination in oil reservoirs." /></p> <p>The lowly sight glass has been used for generations as a quick and easy method to ensure that fluid level in a hydraulic reservoir, gearbox, or transmission housing is at an acceptable level. <a href="http://www.descase.com" target="_blank">Des-Case Corp.</a>, Goodletsville, Tenn., does the sight glass one better with its redesigned oil sight glass (OSG).</p> <p>Most OSGs have clear bottoms making it more difficult to visually detect the presence of sediment in oil. Des-Case&rsquo;s new OSG has a white bottom that makes detection far easier and more reliable. The redesigned device also has a dual mount versatility for use in both horizontal and vertical applications, eliminating the need to buy two single-orientation OSGs.&nbsp; And the sight glass&rsquo; polyamide casing not only provides a clear view of the oil, but is strong enough to withstand impacts.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-motors-give-mexican-dam-big-lift">Hydraulic Motors Give Mexican Dam a Big Lift</a></p> <p><a href="http://hydraulicspneumatics.com/maintenance/ifps-summarizes-fluid-power-safety-guidelines">IFPS Summarizes Fluid Power Safety Guidelines</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/loader-backhoe-offers-power-low-maintenance-and-economy">Loader-Backhoe Offers Power, Low Maintenance, and Economy</a></p> </div> <p>&ldquo;We challenged our engineers to reimagine how an oil sight glass can increase the visibility, durability, and versatility of the process of visual oil analysis.&rdquo; Said Brian Gleason, CEO of Des-Dase. &ldquo;Working closely with our customers, manufacturing team, and other industry experts, they have designed what is truly the next generation of the oil sight glass.&rdquo;</p> <p><img alt="Fig. 2" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Des-Case-OSG_bottom.jpg" style="width: 250px; height: 250px; margin: 5px; float: left;" />A clear cylinder installs in the drain port of the oil reservoir of equipment, the OSG provides continuous fluid monitoring of the clarity, color, sediment, and water contamination of the oil. An oil sight glass can play a critical role in early detection of contamination and allow for constant monitoring of what&rsquo;s happening inside equipment that might degrade both oil and equipment life.</p> <p>Undoubtedly, the most important improvement in the new Des-Case oil sight glass is the improved visibility in detecting machine wear and contamination. Other improvements include a sloped floor for better sediment drainage, indication marks to easily monitor accumulation of water, and improved UV resistance and compatibility with all gear and mineral oils, most synthetic oils and diesel.</p> <p>&ldquo;By using OSGs in combination with a desiccant breather and proper filtration, reliability and maintenance professionals can provide the ultimate protection and long life for machinery,&rdquo; said Gleason.&nbsp; And by using Des-Case&rsquo;s reimagined OSG, they&rsquo;ll have the latest generation of engineering and technology that will ensure greater reliability for their plants and equipment.&rdquo;</p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> </div> http://hydraulicspneumatics.com/controls-instrumentation/when-sight-glass-isn-t-just-sight-glass#comments Controls & Instrumentation Wed, 28 Dec 2016 20:55:00 +0000 41311 at http://hydraulicspneumatics.com Hydraulics Give Injection Blow Molder a Boost http://hydraulicspneumatics.com/blog/hydraulics-give-injection-blow-molder-boost <div class="node-body blog-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/09/09/The%20blow%20clamp%20manifold%20was%20outfitted%20with%204WRLE%20proportional%20valves%20and%20Bosch%20Rexroth%20pressure%20filters.PNG" style="width: 350px; height: 230px; margin: 3px; float: left;" title="1. The blow clamp manifold was outfitted with 4WRLE proportional valves and Bosch Rexroth pressure filters." />Injection blow molding machines from&nbsp;<a href="http://www.jomarcorp.com" target="_blank">Jomar&nbsp;Corp</a> are used&nbsp;by manufacturers to&nbsp;produce thin-walled items like bottles and containers used in pharmaceutical, health care, personal care, beauty, food, beverage, and household-goods markets.&nbsp;Jomar&nbsp;Corp.&rsquo;s newest <a href="http://www.jomarcorp.com/machines-sales/jomar-model-85s" target="_blank">85S Model of&nbsp;IntelliDrive&nbsp;injection blow molding (IBM) machines</a> is equipped with a&nbsp;Syntronix&nbsp;servo-driven hydraulic system from <a href="http://www.boschrexroth.com/en/us" target="_blank">Bosch&nbsp;Rexroth</a>,&nbsp;boosting efficiency by 40%-50% compared to conventional drives. The new system is the first of its kind to incorporate several new-to-market components in a unique, space-saving design.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/blog/intensive-procedure-helps-ensure-hydraulic-hose-cleanliness">Intensive Procedure Helps Ensure Hydraulic-Hose Cleanliness</a></p> <p><a href="http://hydraulicspneumatics.com/blog/pet-food-production-perks-pneumatic-valves ">Pet-Food Production Perks Up with Pneumatic Valves</a></p> <p><a href="http://hydraulicspneumatics.com/blog/videos-give-tips-clutch-and-brake-installation">Videos Give Tips on Clutch and Brake Installation</a></p> </div> <p>The design takes&nbsp;high pressures&nbsp;into consideration&nbsp;as the&nbsp;plastifier&#39;s&nbsp;screw drives&nbsp;inject melted plastic into the&nbsp;molds, and&nbsp;compressed air is introduced in the mold to create a vacancy. The molds are&nbsp;held tightly shut by a&nbsp;clamp, which is opened and closed over millions of cycles to form and release&nbsp;the products. To supply these pressures with higher efficiency,&nbsp;Jomar&nbsp;and Bosch&nbsp;Rexroth&nbsp;investigated a&nbsp;closed-loop, servo-driven&nbsp;hydraulic&nbsp;system that would replace the all-electric platform used in previous models. The new system combines intelligent digital controls with a 4-quadrant pump-servo motor&nbsp;system that regulates the speed and flow of hydraulic oil.</p> <p><span style="font-size: 12.8px;">Si</span><span style="font-size: 12.8px;">nce</span><span style="font-size: 12.8px;">&nbsp;the plastifier is the largest&nbsp;energy consumer on&nbsp;the&nbsp;</span><span style="font-size: 12.8px;">machine, t</span>he team first looked to equip it&nbsp;with&nbsp;Rexroth&#39;s&nbsp;<a href="https://www.boschrexroth.com/en/xc/products/product-groups/industrial-hydraulics/sytronix-variable-speed-pump-drives/variable-speed-pump-drives-1" target="_blank">Syntronix&nbsp;variable speed drive</a><span style="font-size: 12.8px;">. The system consists of a </span>Rexroth<span style="font-size: 12.8px;"> </span><span style="font-size: 12.8px;"><a href="https://www.boschrexroth.com/en/xc/products/product-groups/industrial-hydraulics/pumps/axial-piston-pumps/variable-pumps/a10-vso-series-32/index" target="_blank">A10 axial piston&nbsp;pump</a>,&nbsp;and a&nbsp;</span>Rexroth<span style="font-size: 12.8px;">&nbsp;MSK servo motor with an&nbsp;</span><a href="http://www.boschrexroth.com/dcc/Vornavigation/VorNavi.cfm?PageID=g98367&amp;Language=en" target="_blank">IndraDrive</a><span style="font-size: 12.8px;"><a href="http://www.boschrexroth.com/dcc/Vornavigation/VorNavi.cfm?PageID=g98367&amp;Language=en" target="_blank">&nbsp;C</a> that are sized to&nbsp;provide the right torque, speed, and horsepower to a motor driving the&nbsp;</span>plastifier<span style="font-size: 12.8px;">. The variable speed drive&nbsp;operates in four quadrants; it&nbsp;changes direction of rotation and has two pressure&nbsp;sides&nbsp;that&nbsp;respond to operational changes in the&nbsp;motor, eliminating the need for proportional directional control valves and&nbsp;saving&nbsp;on cost and energy.</span></p> <p>The A10&nbsp;Rexroth&nbsp;axial piston pump is a relatively new design that operates at higher speeds, performs&nbsp;proportional operations, and operates in all four quadrants of the&nbsp;Syntronix&nbsp;hydraulic system. It supplies hydraulic oil to turn a&nbsp;<a href="https://www.boschrexroth.com/en/xc/products/product-groups/industrial-hydraulics/motors/products/radial-piston-motors/haegglunds-cab/standard-page-3-optional-marginal-column-3" target="_blank">Hagglunds&nbsp;CAb radial piston&nbsp;motor&nbsp;</a>connected to the&nbsp;plastifier&nbsp;screw.&nbsp;The result is a closed-loop pump driving a hydraulic motor on an extruder in bidirectional operation.&nbsp;Specifically designed for plastics&#39; industry&nbsp;plastifier&nbsp;drives, CAb is known as the &ldquo;hidden beast&rdquo; because it packs a lot of power into a compact, low-noise design.&nbsp;To reduce the overall footprint, the CAb was vertically mounted to drive a vertical&nbsp;plastifier.&nbsp;The&nbsp;Hagglunds&nbsp;Cab radial piston motor is the first to be sold in North America.&nbsp;</p> <p style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px; margin: 0in 0in 0.0001pt;"><span style="font-size: 9.5pt; font-family: &quot;lucida sans unicode&quot;, sans-serif; color: black; border-width: 1pt; border-style: none; border-color: windowtext; padding: 0in;"><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/12/26/The%20BR%20servo%20motor%20with%20an%20A10FZH%20hydraulic%20pump%20connect%20to%20the%20new%20Hagglunds%20Beast%20motor%20which%20is%20installed%20on%20a%20vertical%20plastifier.PNG" style="width: 346px; height: 230px; margin: 3px; float: left;" title="2. The BR servo motor with an A10FZH hydraulic pump is connected to the new Hagglunds Beast motor. The motor is installed on a vertically mounted plastifier to reduce the overall footprint of the machine." /></span></p> <p>The machine also combines a Bosch&nbsp;DRn frequency drive with the&nbsp;Sytronix&nbsp;hydraulic system to save energy as a variable speed drive. It calculates the most efficient motor speed based on the current pump operating conditions. This allows the system to run at optimal motor speed without programming by the customer.&nbsp;The&nbsp;Jomar-Bosch&nbsp;Rexroth&nbsp;team also considered the <a href="https://www.boschrexroth.com/en/xc/company/press/index2-1698" target="_blank">Bosch&nbsp;Rexroth&nbsp;VT-HACD</a>&nbsp;controller device for a design that allows fully closed-loop control of velocity and positioning for the injection and blow clamps. This allows for a faster overall machine cycle, better closing cushion-control for the molds, and less wear on the hydraulic cylinders.</p> <p>The&nbsp;85S Model of&nbsp;IntelliDrive&nbsp;injection blow molding (IBM)&nbsp;machine will be showcased at the K Show for plastics and rubbers in Dusseldorf, Germany&nbsp;this year.&nbsp;</p> </div> http://hydraulicspneumatics.com/blog/hydraulics-give-injection-blow-molder-boost#comments News Fluid Power Talk Mon, 26 Dec 2016 20:31:00 +0000 41281 at http://hydraulicspneumatics.com <p>The&nbsp;<span>manifold that supplies oil to the&nbsp;</span><span>blow clamp&nbsp;was outfitted with </span>4WRLE<span> proportional valves and Bosch </span>Rexroth<span> pressure filters.</span></p> December 2016 http://hydraulicspneumatics.com/hydraulics-pneumatics/2016-12-26-0 <div class="node-body magazine_issue-body"></div> <fieldset class="fieldgroup group-mag-teasers"> <div class="field-mag-teaser"> <a href="/hydraulic-pumps-motors/hydraulic-motors-give-mexican-dam-big-lift">Hydraulic Motors Give Mexican Dam a Big Lift</a> <a href="/hose-tubing/direct-route-flexible-systems">A Direct Route to Flexible Systems</a> <a href="/heat-exchangers/first-look-3d-printed-excavator-headline-ifpe-2017">First Look: 3D-Printed Excavator to Headline IFPE 2017</a> </div> </fieldset> <fieldset class="fieldgroup group-publication-info"><legend>Publication Info</legend> </fieldset> Mon, 26 Dec 2016 05:00:00 +0000 41301 at http://hydraulicspneumatics.com Hydraulic Troubleshooting: Start With The Basics http://hydraulicspneumatics.com/blog/hydraulic-troubleshooting-start-basics <div class="node-body blog-body"><p>One of our members wrote to me regarding the following problem:<br /> <br /> <em>&quot;We have a hydraulic system that operates two cylinders. The maintenance staff recently reported that the pump (piston-type) had failed - for reasons unknown at this time. The tank, valves and cylinders were cleaned and a replacement pump installed. The new pump is delivering a maximum pressure of 1,000 PSI and appears to be creating heat. Can you suggest some tips to find a solution to this problem?&quot;</em><br /> <br /> In any troubleshooting situation, no matter how simple or complex the hydraulic system, always start with the basics. This ensures that the obvious is never overlooked. In order for the &#39;obvious&#39; to be obvious, the fundamental laws of hydraulics must be kept in mind:</p> <ul> <li>Hydraulic pumps create flow - not pressure.</li> <li>Resistance to flow creates pressure.</li> <li>Flow determines actuator speed.</li> <li>Pressure determines actuator force.</li> <li>Fluid under pressure takes the path of least resistance.</li> <li>When a fluid (liquid) moves from an area of high pressure to an area of low pressure (pressure drop) without performing useful work, heat is generated.</li> </ul> <p><br /> Theory is great, but it always makes more sense when put into practice. So let&#39;s apply these fundamentals to the above situation in a way that ensures the obvious things are not overlooked.<br /> <br /> <strong>&quot;The new pump is delivering a maximum pressure of 1,000 PSI...&quot;</strong><br /> <br /> We know that a hydraulic pump can only produce flow (pressure is created by resistance to flow). It follows that if the pump can&#39;t get oil it can&#39;t produce flow. So check that the reservoir is filled to the correct level, the breather is not clogged, the suction strainer or filter (if fitted) is not clogged, the pump intake isolation valve is fully open and the pump intake line is otherwise unrestricted.<br /> <br /> If the pump is producing flow, then an absence of pressure indicates an absence of resistance to flow. Knowing this, and that fluid under pressure always takes the path of least resistance, the task now is to find the point at which pump flow is escaping from the circuit. If you&#39;re skilled in reading and interpreting hydraulic symbols, the system&#39;s schematic diagram (if available) can be useful in identifying possible locations.<br /> <br /> <strong>&quot;The new pump... appears to be creating heat.&quot;</strong><br /> <br /> Because heat is generated when there is a pressure drop without useful work, using an infrared thermometer to check the temperature of individual components will quickly lead us to the hottest part of the system - and the probable location of the internal leakage. Note that in a properly functioning system fitted with a piston pump, it is not unusual for the pump case to be the hottest part of the circuit. These checks should have taken less than 10 minutes. If nothing conclusive was revealed, I would continue the process of elimination using a flow-tester to conduct a direct pump test.<br /> <br /> <strong>Bottom line</strong>: not having a solid understanding of the fundamental laws of hydraulics can result in costly troubleshooting mistakes. And to discover six other costly mistakes you want to be sure to avoid with your hydraulic equipment, <a href="http://www.hydraulicsupermarket.com/track?p=handp&amp;w=smr"><strong>get &quot;Six Costly Mistakes Most Hydraulics Users Make... And How You Can Avoid Them!&quot; available for FREE download here</strong></a>.</p> </div> http://hydraulicspneumatics.com/blog/hydraulic-troubleshooting-start-basics#comments Hydraulics At Work Tue, 20 Dec 2016 00:29:00 +0000 41261 at http://hydraulicspneumatics.com IFPS Summarizes Fluid Power Safety Guidelines http://hydraulicspneumatics.com/maintenance/ifps-summarizes-fluid-power-safety-guidelines <div class="field-deck"> “Practice makes perfect” doesn’t apply to safety. You should always practice safety when working on or near hydraulic and pneumatic systems. </div> <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/ifps-summarizes-fluid-power-safety-guidelines-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p>The International Fluid Power Society (IFPS), Cherry Hill, N.J., stresses that implementation of safe procedures is paramount in all fluid power systems, the electrical and electronic controls that guide them, and all associated technologies.</p> <p>IFPS warns not to operate any machinery unless you have read and understand the instructions in the operator&rsquo;s guide. Improper machinery operation is dangerous and could cause injury or death.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/fittings-couplings/extreme-pressures-require-extreme-safety">Extreme Pressures Require Extreme Safety</a></p> <p><a href="http://hydraulicspneumatics.com/pneumatic-valves/certified-valves-ensure-safety-event-fau">Certified Valves Ensure Safety In the Event of a Fault</a></p> <p><a href="http://hydraulicspneumatics.com/news/website-tackles-safety-workplace">Website Tackles Safety in the Workplace</a></p> </div> <h3>Hydraulic Safety Guidelines for Hydraulics</h3> <p><strong>Fluid injections</strong>&mdash;Fine streams of escaping pressurized fluid can penetrate the skin and, thus, enter the human body. If a fluid injection accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Do not delay treatment or treat injections as a simple cut!</p> <p><strong>Fluid spills</strong>&mdash;Clean up leakage immediately to prevent personnel from slipping and the potential for fire. Do not return any spilled fluid to the reservoir because of the contamination that can be introduced to the hydraulic system. Clean up fluid spills and associated materials and follow proper disposal procedures.</p> <p><strong>Whipping hoses</strong>&mdash;If a pressurized hose or tube assembly blows apart, the fittings can be thrown off at high speed, and the loose hose can flail or whip around with great force. Where this risk exists, consider the use of guards and hose restraints to protect against injury.</p> <p><strong>Burns from conveyed fluids</strong>&mdash;Hydraulic fluids can reach temperatures that can burn human skin. If a risk of burns exists from escaping fluid, consider using guards and shields, particularly in areas where operators are located.</p> <p><img alt="IFPS Society" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/IFPS-logo.jpg" style="margin: 5px; font-size: 12.8px; width: 150px; height: 147px; float: left;" /><strong>Fire and explosion from conveyed fluids&mdash;</strong>Most hydraulic fluids, including fire-resistant hydraulic fluids, will burn under certain conditions. As fluid escapes from a pressurized system, a mist of fine spray may be formed. The fluid may then flash or explode upon contact with an ignition source. Use area guards, hose shields, and route fluid conductors to minimize the risk of combustion.</p> <p><strong>Fire and explosion from static electric discharge&mdash;</strong>Fluid passing through fluid conductors can generate static electricity, resulting in a static electric discharge. This may create sparks that can ignite system fluids or gases in the surrounding atmosphere. When the potential of this hazard exists, select fluid conductors specifically designed to carry the static electricity charge to ground, thereby reducing the risk of injury or damage.</p> <p><strong>Electric shock and high current discharge&mdash;</strong>Electrocution could occur if hydraulic tubing conducts electricity to a person. In the case of high amperage, tubing could short the electricity to ground, which in turn could create very high fluid temperatures. Electrical wiring and hydraulic lines should be isolated by being separated and securely fastened to avoid contact between the two types.</p> <p><strong>Mechanisms controlled by hydraulics</strong>&mdash;Mechanisms controlled by fluid in tubing and hoses may become hazardous when a tube or hose fails. Objects supported by the pressurized fluid may inadvertently fall. Vehicles or machines may experience loss of power or control. Be aware of these events and learn what actions to take in case they happen.</p> <h3>Safety Guidelines for Pneumatics</h3> <p>Compressed air can be dangerous unless precautions are taken. Use eye protection, and keep proper safety guidelines displaced in a prominent place.</p> <p>It is essential that a check valve and shutoff valve are fitted in the delivery line when a system&rsquo;s compressor is to be coupled in parallel with another compressor or connected to an existing air supply system. In such cases, a safety valve must be provided upstream of the valves, unless one is already fitted on the compressor.</p> <p>Do not use frayed, damaged or deteriorated hoses. Always store hoses properly and away from heat sources or direct sunlight. A hose failure can cause serious injury.</p> <p>Use only the correct type and size of hose or tubing, fittings and connections. Ensure that tolerances on plastic tubing match the requirements of the fittings. Secure all flexible lines with clamps.</p> <p>If using compressed air for cleaning equipment, do so with extreme caution. Take care not to blow dirt at people or into machinery.</p> <p>When initially pressurizing a hose or air line, ensure that the open end is held securely. A free end will whip and can cause injury. Open the supply valve carefully and ensure that any ejected particles will be restrained. A blocked hose can become a compressed air gun.</p> <p>Never apply compressed air to the skin or direct it at a person. It can cause serious injury.</p> <p>When using compressed air for cleaning purposes, ensure that pressure at the nozzle does not exceed 30 psi. Do not use compressed air to clean dust or debris off the body or from clothing.</p> <p>Do not use air directly from a compressor for breathing purposes.</p> <p>If an isolating or check valve is fitted in the compressor discharge, it is essential to ensure that an adequate safety valve is in place between this isolating valve and the compressor and that the isolating valve is open.</p> <p>Isolating valves should be of the self-venting type and designed to be locked in the off position so that air pressure cannot be applied inadvertently while the machine is being serviced. All lock-out/tag-out procedures should be carefully followed.</p> <p>Vent all components into a non-hazardous area that is connected to the atmosphere. A concentration of oil mist in the air from system lubricators can be hazardous. Use properly sized oil removal filters at exhaust ports where necessary.</p> <p>Check tubing, hoses and couplings daily before use. Use only conductors designed to handle compressed air. Provide all hose couplings with a positive locking device. Secure Chicago-type fittings together with wire or clips.</p> <p>Never crimp, couple, or uncouple pressurized hose. Use shutoff valves and remove residual pressure before working on hoses.</p> <p>Make sure all hoses exceeding &frac12;-in. ID contain a velocity fuse device at the source of supply or branch line to reduce the pressure in case of hose failure.</p> <p>Periodically examine the level of oil in lubricators and the fluid level in filters. Maintain proper levels at all times, and ensure that lubricators are filled with the proper type of lubricant.</p> <p><em>For more information on fluid power safety and IFPS certification programs, call (800) 308-6005, email <a href="mailto:askus@ifps.org">askus@ifps.org</a>, or visit <a href="http://www.ifps.org" target="_blank">www.ifps.org</a>.</em></p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/ifps-summarizes-fluid-power-safety-guidelines-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <div>&nbsp;</div> </div> http://hydraulicspneumatics.com/maintenance/ifps-summarizes-fluid-power-safety-guidelines#comments Maintenance Fri, 16 Dec 2016 21:02:00 +0000 41241 at http://hydraulicspneumatics.com IFPS Summarizes Fluid Power Safety Guidelines (.PDF Download) http://hydraulicspneumatics.com/datasheet/ifps-summarizes-fluid-power-safety-guidelines-pdf-download <div class="node-body datasheet-body"><p>The International Fluid Power Society (IFPS), Cherry Hill, N.J., stresses that implementation of safe procedures is paramount in all fluid power systems, the electrical and electronic controls that guide them, and all associated technologies. IFPS warns not to operate any machinery...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> <div class="gatedLogin well"> <div class="contentPadding clearfix"> <h2>Register for Complete Access (Valid Email Required)</h2> <p><p><img height="auto" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/10/SALARY_SURVEY_HPcover.jpg" width="100%" />By registering on Hydraulics &amp; Pneumatics now, you&#39;ll not only gain access to , you&#39;ll also receive a complimentary copy of <em>Hydraulics &amp; Pneumatics 2016 Salary &amp; Career Report</em>.</p> </p> <div class="gatedLoginButtons gated-register-button"> <div class="button-region"> <a href="/penton_ur/nojs/user/register?source=gated&nid=41251&regmode=1" class="ctools-use-modal btn btn-branded btn-wide ctools-modal-register" title="Register at this site.">Register</a> </div> <div class="loginLinkText"> Already registered? <a href="/penton_ur/nojs/login" class="ctools-use-modal ctools-modal-log_in" title="">Log In</a> here. </div> </div> </div> </div> </div> Gold Fri, 16 Dec 2016 20:40:00 +0000 41251 at http://hydraulicspneumatics.com Hydraulic Motors Give Mexican Dam a Big Lift (.PDF Download) http://hydraulicspneumatics.com/datasheet/hydraulic-motors-give-mexican-dam-big-lift-pdf-download <div class="node-body datasheet-body"><p>A crane with a huge iron plate on its hook stands on the dam wall at Nezahualc&oacute;yotl Lake in southern Mexico. The crane operator carefully lowers it...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> <div class="gatedLogin well"> <div class="contentPadding clearfix"> <h2>Register for Complete Access (Valid Email Required)</h2> <p><p><img height="auto" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/10/SALARY_SURVEY_HPcover.jpg" width="100%" />By registering on Hydraulics &amp; Pneumatics now, you&#39;ll not only gain access to , you&#39;ll also receive a complimentary copy of <em>Hydraulics &amp; Pneumatics 2016 Salary &amp; Career Report</em>.</p> </p> <div class="gatedLoginButtons gated-register-button"> <div class="button-region"> <a href="/penton_ur/nojs/user/register?source=gated&nid=41231&regmode=1" class="ctools-use-modal btn btn-branded btn-wide ctools-modal-register" title="Register at this site.">Register</a> </div> <div class="loginLinkText"> Already registered? <a href="/penton_ur/nojs/login" class="ctools-use-modal ctools-modal-log_in" title="">Log In</a> here. </div> </div> </div> </div> </div> Gold Fri, 16 Dec 2016 17:23:00 +0000 41231 at http://hydraulicspneumatics.com In the Driver’s Seat http://hydraulicspneumatics.com/blog/driver-s-seat <div class="node-body blog-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/driver-s-seat-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="Waste Expo 2016" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Waste%20Expo.jpg" style="width: 595px; height: 397px;" title="Waste Expo 2016" /></p> <p>All the shows we cover deal with fluid power in some size, shape, or form. You&rsquo;ll find a lot of exhibitors showcasing hydraulic components at <a href="http://www.wasteexpo.com" target="_blank">Waste Expo</a>, where hydraulic cylinders squeeze all kinds of materials to a fraction of their original size for more effective disposal or recycling. Powerful hydraulic motors also rotate shredder blades to reduce tires, furniture, and appliances into small pieces for efficient processing. Catch Waste Expo May 9-11, 2017, in New Orleans.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/events/fluid-power-takes-spotlight-pack-expo">Fluid Power Takes the Spotlight at Pack Expo</a></p> <p><a href="http://hydraulicspneumatics.com/air-compressors/fluid-power-professionals-invited-attend-imts">Fluid Power Professionals Invited to Attend IMTS</a></p> <p><a href="http://hydraulicspneumatics.com/other-technologies/offshore-technology-conference-open-industry-professionals-students-alike">Offshore Technology Conference Open to Industry Professionals, Students Alike</a></p> </div> <p>You&rsquo;ll find even more hydraulics at the <a href="http://2017.otcnet.org" target="_blank">Offshore Technology Conference (OTC)</a>, which will be held in Houston May 1-4, 2017. OTC showcases the power and precision of hydraulics in a wide variety of marine, offshore, and dockside applications. What sticks in my mind most from visiting OTC is learning how hydraulics can move loads weighing hundreds of tons while controlling their position within inches, despite random motion of ocean waves.</p> <p>Let&rsquo;s not forget about pneumatics. Packaging is probably the single largest industry that relies on the speed, reliability, and many benefits of pneumatics. <a href="http://www.packexpointernational.com" target="_blank">Pack Expo</a> is the venue that covers this important sector of pneumatics, and it is held every year, alternating between Chicago and Las Vegas. Las Vegas will host Pack Expo next year from Sept. 25-27.</p> <p>However, the largest sector of pneumatics is factory automation. In fact, it&rsquo;s also a huge sector for industrial hydraulics. Both technologies are addressed by the <a href="https://www.imts.com" target="_blank">International Manufacturing Technology Show (IMTS)</a>, held every other year in Chicago. Each IMTS introduces more and increasingly sophisticated controls to the manufacturing marketplace, and this year was no exception. Look for more of the same in 2018, when IMTS storms into Chicago&rsquo;s McCormick Place Sept. 10 through 15.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/11/10/pullquote260px_0.gif" style="width: 270px; height: 251px; float: left; margin-top: 6px; margin-bottom: 6px;" /></p> <p>One of my favorites is the <a href="http://www.icuee.com" target="_blank">International Construction &amp; Utility Equipment Exposition (ICUEE)</a>, also held every odd-numbered year, but in Louisville, Ky. Next year it will be held Oct. 3-5. As its name implies, ICUEE does not focus on hydraulics, but hydraulics is such an integral part of construction and utility equipment that it&rsquo;s a must-attend event because of its many fluid power exhibitors. It&rsquo;s also known as the Demo Expo because you&rsquo;ll be able to see all kinds of machines lifting, digging, and moving all kinds of loads&mdash;all thanks to hydraulics.</p> <p>The largest single industry in fluid power is construction equipment. The construction industry comes together every three years in Las Vegas for <a href="http://www.conexpoconagg.com" target="_blank">ConExpo</a>, which will convene in early March 2017 in Las Vegas. However, the big news is <a href="http://www.ifpe.com" target="_blank">IFPE 2017</a>, which will be held in conjunction with ConExpo.</p> <p>IFPE 2017 is all about fluid power. More than 350 exhibitors will show off their products and services March 7-11 in the South Hall of the Las Vegas Convention Center. This issue kicks off our <a href="http://hydraulicspneumatics.com/heat-exchangers/first-look-3d-printed-excavator-headline-ifpe-2017" target="_blank">First Look at IFPE</a> with an article by staff editor <a href="http://hydraulicspneumatics.com/author/leah-scully" target="_blank">Leah Scully</a> beginning on page 38.</p> <p>Our coverage will continue next month with a detailed preview of the technical conference, college-level courses, and other educational opportunities offered at IFPE. Then our February issue will be our big splash, with extensive coverage of what IFPE has to offer, including a list of exhibitors, floor plan, events surrounding the show, and a preview of products that will be showcased by exhibitors.</p> <p>We have a few things planned for our booth that we&rsquo;ve never done before. They&rsquo;re not really a secret, but they should be a big draw for anyone with an appetite for learning about fluid power.</p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><span style="font-size: 10.24px;"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></span></td> <td style="padding-left: 0px;" width="459"><font color="#000000"><span style="font-size: 10.24px;"><a href="/datasheet/driver-s-seat-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</span></font></td> </tr> </tbody> </table> </div> http://hydraulicspneumatics.com/blog/driver-s-seat#comments Construction Controls & Instrumentation Cylinders & Actuators Marine & Offshore Hydraulic Fluids Waste Management News The Hitch Post Fri, 16 Dec 2016 16:05:00 +0000 41201 at http://hydraulicspneumatics.com In the Driver’s Seat (.PDF Download) http://hydraulicspneumatics.com/datasheet/driver-s-seat-pdf-download <div class="node-body datasheet-body"><p>All the shows we cover deal with fluid power in some size, shape, or form. You&rsquo;ll find a lot of exhibitors showcasing hydraulic components at Waste Expo, where hydraulic cylinders squeeze...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> <div class="gatedLogin well"> <div class="contentPadding clearfix"> <h2>Register for Complete Access (Valid Email Required)</h2> <p><p><img height="auto" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/10/SALARY_SURVEY_HPcover.jpg" width="100%" />By registering on Hydraulics &amp; Pneumatics now, you&#39;ll not only gain access to , you&#39;ll also receive a complimentary copy of <em>Hydraulics &amp; Pneumatics 2016 Salary &amp; Career Report</em>.</p> </p> <div class="gatedLoginButtons gated-register-button"> <div class="button-region"> <a href="/penton_ur/nojs/user/register?source=gated&nid=41211&regmode=1" class="ctools-use-modal btn btn-branded btn-wide ctools-modal-register" title="Register at this site.">Register</a> </div> <div class="loginLinkText"> Already registered? <a href="/penton_ur/nojs/login" class="ctools-use-modal ctools-modal-log_in" title="">Log In</a> here. </div> </div> </div> </div> </div> Gold Fri, 16 Dec 2016 15:52:00 +0000 41211 at http://hydraulicspneumatics.com Hydraulic Motors Give Mexican Dam a Big Lift http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-motors-give-mexican-dam-big-lift <div class="field-deck"> Electromechanical drives on spillway gates at Mexico’s Malpaso Dam needed to be replaced. Low-speed, high-torque hydraulic motors proved not only to be the best solution, but also serve as a blueprint for the future retrofitting of dams. </div> <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/hydraulic-motors-give-mexican-dam-big-lift-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="Fig. 1" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Three-men.jpg" style="width: 595px; height: 423px;" title="Bosch Rexroth employees (left to right) Manuel Schuhmann, Martín Gómez, and Abraham Huerta stand in front of the modernized spillway gates to provide scale for the size of the gates. " /></p> <p>A crane with a huge iron plate on its hook stands on the dam wall at Nezahualc&oacute;yotl Lake in southern Mexico. The crane operator carefully lowers it into the lake in front of a spillway gate in the dam. The water mass of the lake pushes the plate against the concrete wall as the plate slowly descends, closing the opening. The spillway gate then opens, and the water between it and the iron plate drains off. The spillway gate&mdash;which usually prevents the dam from overflowing&mdash;is now dry, so workers can now inspect the area.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electric-analogies-stepper-motors">Hydraulic-Electric Analogies: Stepper Motors</a></p> <p><a href="http://hydraulicspneumatics.com/blog/hydraulic-motor-dry-starts-and-how-avoid-them">Hydraulic Motor &#39;Dry Starts&#39; And How To Avoid Them</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electrical-analogies-transmission-comparisons-part-1">Hydraulic-Electrical Analogies: Transmission Comparisons, Part 1</a></p> </div> <p>Manuel Schuhmann, technical project manager at <a href="http://sourceesb.com/boschrexrothelectricdrivescntrls/distributors-and-vendors" target="_blank">Bosch Rexroth</a>, is enthusiastic: &ldquo;It is fascinating: The plate, or the so-called stop lock, is held in place solely by the reservoir&rsquo;s water pressure.&rdquo; The task of the engineers is to modernize the old drives on the dam&rsquo;s spillway gates.</p> <h3>Cautious Innovation</h3> <p>Built between 1958 and 1966, the 138-m-high dam, which is officially known as the Nezahualc&oacute;yotl Dam, holds back a lake with more than 10 million m<sup>3</sup> of water and a surface area of about 110 km<sup>2</sup>. The dam protects the lowlands of the Federal State of Tabasco against yearly flooding and also contains six turbines, which generate hydroelectric power for the region.</p> <p>The Comisi&oacute;n Federal de Electricidad (CFE) operates the dam and invests regularly in the safety and availability of all its technical equipment. Last year the Comisi&oacute;n decided to modernize three of the dam&rsquo;s seven spillway gates, which regulate the water level of the reservoir. Each spillway had an electric motor driving two pinion gear drives via a drive shaft. The motor had been raising the 170-ton spillway gate using chains on each side ever since the dam went into operation in the 1960s.</p> <p>Mart&iacute;n G&oacute;mez, project manager at Bosch Rexroth in Mexico, recalls the CFE&rsquo;s invitation to tender for this project: &ldquo;We initially proposed a solution with long-stroke hydraulic cylinders to drive the gates.&rdquo; The team had already used this proven type of drive in new construction many times&mdash;such as the La Yesca Dam, also in Mexico. However, the concrete structure at the Malpaso Dam proved to be unsuitable.</p> <p>Without reinforcement, the wall could not withstand the forces of the cylinders. And converting the concrete structure would have been a lengthy and complex process. &ldquo;So we developed a solution that uses the existing chain hoist,&rdquo; G&oacute;mez &nbsp;explains, &ldquo;but with all the advantages of hydraulics.&rdquo; Schuhmann adds, &ldquo;In steel construction for hydraulic engineering, the most important factor is safety. When we were able to show that similar hydraulic systems were already being successfully used in other dams, we got the contract.&rdquo;</p> <p><img alt="Fig. 2" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/Direct-drive.jpg" style="width: 595px; height: 397px;" title="A Hägglunds radial-piston motor drives the spillway gate chain directly. The soft startup of the motor significantly extends the service life of the chain. " /></p> <h3>Safety First</h3> <p>The Malpaso solution has a hydraulic power unit (HPU) permanently installed in each gate. Each HPU drives two H&auml;gglunds low-speed, high-torque radial-piston motors. These motors, provided by Bosch Rexroth, replace the mechanical gear and drive the chains&rsquo; sprockets directly. G&oacute;mez explains, &ldquo;The hydraulic system has natural overload protection. So if, for example, a tree trunk gets wedged in the gate, and the chain load becomes greater than calculated, a relief valve dissipates the pressure to prevent damaging the drive. This scenario would cause a mechanical drive to break down. Our hydraulic solution offers a clear safety advantage.&rdquo;</p> <p>As an additional safety measure, the Bosch Rexroth hydraulic engineers mounted a spring-applied, pressure-released disk brake on each motor. The brake lets the system operate as long as it is pressurized. But if operating pressure is lost for any reason, the brake closes automatically with enough force to stop the spillway gate. This ensures maintaining control of the gate even in the unlikely event of power failure.</p> <p><img alt="Fig. 3" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/HPU.jpg" style="width: 595px; height: 288px;" title="Enclosures of the hydraulic power units are air-conditioned to shield them from hot, humid conditions of the site. " /></p> <h3>Easy on the Chains</h3> <p>The new hydraulic drive also protects the chains. The electromechanical drove produced jerky motion when started; it yanked and tugged at the chains before moving the spillway. This not only placed high stress on the chain links, but also on all the mechanical parts involved, necessitating frequent service. &ldquo;The hydraulic drive, on the other hand, starts up slowly and steadily and gently tightens the chain,&rdquo; says G&oacute;mez. &ldquo;This considerably reduces the maintenance measures required.&rdquo;</p> <p>Bosch Rexroth not only conducted the engineering and installation, but also the electrical control system, including software programming. Schuhmann explains, &ldquo;Each hydraulic power unit has its own electrical control system. Operators also have the option of controlling all three through a panel. Conveniently, the operator can make adjustments on the touchscreen to open the spillway one meter, for example.&rdquo; Compared to the buttons and levers, this is a huge improvement in ease of use. The decisive factor, however, lies elsewhere: The spillway now transmits position data to indicate whether it is closed or to what degree it is open. It also transmits water temperature and pressure.</p> <p>The Bosch Rexroth engineers worked three months and completed the retrofit project in June 2015 where the crane lifted out the iron plates. Three spillway gates now have a new, safer drive, and work began on the remaining four. Schuhmann adds, &ldquo;We already have inquiries from India, where they want to know more about the hydraulic chain hoist drive. This could be a new standard solution for retrofits!&rdquo;</p> <p><em>For more information on Bosch Rexroth&rsquo;s H&auml;gglunds radial-piston motors, click <a href="http://boschrexroth-us.com/hagglunds" target="_blank">here</a>.</em></p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/hydraulic-motors-give-mexican-dam-big-lift-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> </div> http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-motors-give-mexican-dam-big-lift#comments Hydraulic Pumps & Motors Fri, 16 Dec 2016 05:42:00 +0000 41221 at http://hydraulicspneumatics.com Troubleshooting Challenge: Drilling Barge with Steering Instability Problem http://hydraulicspneumatics.com/community/troubleshooting-challenge-drilling-barge-steering-instability-problem <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/troubleshooting-challenge-drilling-barge-steering-instability-problem-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="Barge rudder system" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/1216_HP_Troubleshooting_Fig.gif" style="width: 595px; height: 572px;" /></p> <p>An OEM that builds barges was contracted to build a barge with a movable drilling rig mounted on it. The final customer wanted to be able to position the barge, drop the four-corner spuds (outriggers), and drill holes in the port floor as the first stage of deepening the port for the bigger neo-Panamax ships going through the Panama Canal.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/cylinders-actuators/troubleshooting-challenge-cylinder-chatter-evades-solution">Troubleshooting Challenge: Cylinder Chatter Evades Solution</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-valves/troubleshooting-challenge-regenerative-circuit-not-working-molding-machine">Troubleshooting Challenge: Regenerative Circuit Not Working on a Molding Machine</a></p> <p><a href="http://hydraulicspneumatics.com/controls-instrumentation/troubleshooting-challenge-fix-one-problem-another-crops">Troubleshooting Challenge: Fix One Problem, Another Crops Up</a></p> </div> <p>The rudder system used to guide the barge was designed using a hydraulic joystick proportional system. The main feature was the ability to move the joystick to reposition the rudders; releasing the joystick would maintain the new angle position of the rudders. A set of Sun Hydraulics counterbalance valves was used in conjunction with a <em>purging system</em>. A purging system prevents hot contaminated oil from exiting and then re-entering the cylinders without making it back to the tank. The hydraulic power unit would be located about 50 ft from the steering cylinder system with Sun block mounted on the cylinders.</p> <p>When commissioning the barge, the steering system would not hold its position. It would respond well to a signal to reposition, but when the joystick was released the rudders would move on their own after three to four minutes&rsquo; time lag based on the water currents&rsquo; direction.</p> <p>Any idea what the problem is?</p> <h3>Find the Solution</h3> <p>Think you know the answer to this month&rsquo;s problem? Submit your solution by emailing <a href="http://timmer@cfc-solar.com" target="_blank">Mindy Timmer</a>. All correct solutions submitted by December 30, 2016, will be entered into a random drawing for a $50 gift card. The winner will be notified, and his or her name will be printed in a future issue. Only one gift card will be awarded to any participant within a calendar year.</p> <p>Congratulations to Paul Lopez, CFPS, from Michaelson Fluid Power, Smithfield, R.I., who correctly answered last month&sup1;s puzzler. A $50 gift card is in the mail to him.</p> <h3>Solution to Last Month&rsquo;s Challenge: <a href="http://hydraulicspneumatics.com/cylinders-actuators/troubleshooting-challenge-cylinder-chatter-evades-solution" target="_blank">Cylinder Chatter Evades Solution</a></h3> <p>The use of a counterbalance valve with a proportional directional valve will cause a cylinder to chatter if the counterbalance valve spring chamber drain line is internally drained. As the proportional valve throttles the flow exiting the counterbalance, pressure builds up between the counterbalance and proportional valve due to the restriction. Any pressure that builds up in a spring chamber of any pressure control is additive to the valves spring setting. The proportional was causing the counterbalance setting to vary. Externally draining the counterbalance valve solved the chatter problem.</p> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/troubleshooting-challenge-drilling-barge-steering-instability-problem-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> </div> http://hydraulicspneumatics.com/community/troubleshooting-challenge-drilling-barge-steering-instability-problem#comments Community Thu, 15 Dec 2016 20:42:00 +0000 41171 at http://hydraulicspneumatics.com <p>Courtesy of Thinkstock</p> Troubleshooting Challenge: Drilling Barge with Steering Instability Problem (.PDF Download) http://hydraulicspneumatics.com/datasheet/troubleshooting-challenge-drilling-barge-steering-instability-problem-pdf-download <div class="node-body datasheet-body"><p>An OEM that builds barges was contracted to build a barge with a movable drilling rig mounted on it. The final customer wanted to be able to position the barge...</p> <p><strong>​Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> <div class="gatedLogin well"> <div class="contentPadding clearfix"> <h2>Register for Complete Access (Valid Email Required)</h2> <p><p><img height="auto" src="http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2016/10/10/SALARY_SURVEY_HPcover.jpg" width="100%" />By registering on Hydraulics &amp; Pneumatics now, you&#39;ll not only gain access to , you&#39;ll also receive a complimentary copy of <em>Hydraulics &amp; Pneumatics 2016 Salary &amp; Career Report</em>.</p> </p> <div class="gatedLoginButtons gated-register-button"> <div class="button-region"> <a href="/penton_ur/nojs/user/register?source=gated&nid=41181&regmode=1" class="ctools-use-modal btn btn-branded btn-wide ctools-modal-register" title="Register at this site.">Register</a> </div> <div class="loginLinkText"> Already registered? <a href="/penton_ur/nojs/login" class="ctools-use-modal ctools-modal-log_in" title="">Log In</a> here. </div> </div> </div> </div> </div> Gold Thu, 15 Dec 2016 20:26:00 +0000 41181 at http://hydraulicspneumatics.com Hydraulic-Electrical Analogies: Transmission Comparisons, Part 1 http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electrical-analogies-transmission-comparisons-part-1 <div class="field-deck"> The hydrostatic transmission and Ward Leonard generator-motor drive are so perfectly analogous to one another that they must be included in any complete review of analogies. </div> <div class="node-body article-body"><table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/hydraulic-electrical-analogies-transmission-comparisons-part-1-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <p><img alt="Fig. 1" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/DECMotion1.gif" style="width: 595px; height: 401px;" title="1. Shown is the two-port characterization of an ideal, variable displacement pump." /></p> <p>There are, literally, thousands of electronic gadgets and devices for which no effective hydraulic analogy exists. On the other hand, some electric-hydraulic analogies are so perfectly analogous to one another that they have to be included in any reasonably complete review of analogies. Those two devices are the Ward Leonard generator-motor drive and the hydrostatic transmission. But before delving into the details of those two machines, let&rsquo;s revisit some of the earlier concepts, namely the use of analytical schematics to characterize pumps, motor and generators, plus pressure-compensated pumps.</p> <div class="related-content"> <div class="related-label">Related</div> <p><a href="http://hydraulicspneumatics.com/hydraulic-valves/hydraulic-electric-analogies-conditioners">Hydraulic-Electric Analogies: Conditioners</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-filters/hydraulic-electric-analogies-fluid-and-electronic-filters">Hydraulic-Electric Analogies: Fluid and Electronic Filters</a></p> <p><a href="http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electric-analogies-power-conditioning">Hydraulic-Electric Analogies: Power Conditioning</a></p> </div> <h3>Analytical Schematics of Pumps and Motors</h3> <p>The concepts on the ideal variable-displacement pump covered previously are depicted in <em>Fig. 1</em>. Analytical schematics of the ideal pump are so named because they assist in writing the defining equations used for calculating machine sizes and performance. Recall that an ideal machine is 100% efficient. Although unrealistic, it can still be useful, especially as a starting point to more practical pumps.</p> <p>The schematics are helpful in understanding the inner workings of pumps and motors without having to know countless internal details. Analytical schematics are merely extensions and variations on two-port theory, which has found wide application in the many input-output devices found in electrical and electronic systems. The schematics arise because of scrutiny of the pump construction or motor as well as studying the performance data from objective lab tests.</p> <p><em>Figure 1</em> shows the ideal torque and flow-generation portions (designated as <em>I</em> within the circular envelopes) of a variable-displacement pump. The circle on the left is the counter-torque generator and the one on the right is the flow generator. The input port consists of the pair of lines on the left (labeled as <em>T<sub>iP</sub></em>)<strong>, </strong>an arrow, and the two small circles.</p> <p>Two-port parlance always has two connecting points&mdash;one for flow to enter and one for flow to exit. Physically, the input port is the pump&rsquo;s input shaft to which input torque, speed, and power are applied. In electrical two-port theory, the two small, white-filled circular connecting points at the left boundary, taken together, comprise the &ldquo;input port.&rdquo;</p> <p>Torque is analogous to pressure and shaft speed is analogous to flow. Thus, the shaft speed &ldquo;flows&rdquo; through the counter-torque generator. The input shaft and ideal torque generator also comprise the mechanical side of the circuit and are also referred to as the &ldquo;input side of the circuit.&rdquo; It follows, then, that the hydraulic ports comprise the &ldquo;output side of the circuit.&rdquo;</p> <p><img alt="Fig. 2" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/DECMotion2.gif" style="margin: 5px; font-size: 12.8px; width: 300px; height: 331px; float: left;" title="2. The rotating group and cam ring are inserted into the pump body, and again, the non-concentricity of the shaft and cam ring are apparent. The pumping chambers, i.e., the circular trapezoids bounded by the rotor, the cam ring, and consecutive vanes, absorb the inlet fluid and expel the outlet fluid. " />The output side of the circuit is the flow generator and its two output connecting points, labeled <em>A-port, pump</em> and <em>B-port, pump</em>. As in the case of the input port, the output port consists of the two small white connecting points on the right side of the pump envelope (dash-dot line). They provide the connecting points where external plumbing is connected to carry transmit flow to the load and return it to the pump inlet.</p> <h3>Practical Hydraulic Pump Analytical Schematic</h3> <p>The analytical schematic for the practical pump can be conceived by first looking at the machine construction. When the pump is tested in standard fashion&mdash;say, in compliance with ISO 4409 [21]&mdash;the output data show a measurable drop in output flow as output load pressure is increased with the input shaft regulated at a constant speed. The cause is simple: Internal leakage is directly proportional to outlet pressure. That is, the pumping elements, gears, vanes, or pistons displace a fixed amount of fluid each and every revolution, but some of that displaced fluid does not find its way out the outlet port to do useful work. Instead, it slips from the high-pressure regions within the pump and back to the inlet port. There are three identifiable and separate internal leakage paths. They can be visualized by reviewing the construction of a pump, such as the vane pump cutaway in <em>Fig. 2</em>.</p> <p>Referring to Fig. 2, when the rotor is spinning clockwise and &ldquo;dragging&rdquo; its vanes along with it, the blue port is the outlet, high-pressure port, and the yellow is the inlet, low-pressure port. That means all the internal regions to the right of the two vanes (one at top dead center and the other at bottom dead center) are separating the low-pressure regions from the high pressure. Huge pressure differences will be imperfectly sealed by the vanes, which are in sliding contact with the inner surface of the cam ring, the rotor-vane slots, and the two end-plate surfaces. The sliding contact means that gaps, tiny though they may be, are present at all the sliding surfaces. The parts are riding on a thin film of fluid, usually oil, providing lubrication for the sliding parts. Some of the leakage fluid passes directly from the high-pressure zone to the inlet kidney port to be immediately recirculated to the outlet. This is referred to as <em>port-to-port leakage</em> and is carried through the port-to-port leakage path, R<sub>LPP</sub>, in <em>Fig. 3</em>.</p> <p><img alt="Fig. 3" src="/site-files/hydraulicspneumatics.com/files/uploads/2016/10/11/DECMotion3.gif" style="width: 595px; height: 409px;" title="3. Two-port characterization of the Type 2 variable displacement pump incorporates the loss elements made up of mechanical friction and internal leakages, of which there are three. There also appears a fifth hydraulic port, labeled CD for “case drain” port." /></p> <p>There is another identifiable leakage path. It carries fluid from the high-pressure port&mdash;mostly along the ends of the vanes and the rotor&mdash;into the low-pressure cavity inside the pump housing. Because the shaft must penetrate from the outside environment to the interior of the pump, the shaft must have a sliding seal. The seal prevents the hydraulic fluid from seeping from the pump interior to its exterior.</p> <p>This means the pump housing can experience relatively high pressure, as much as 50% of the outlet pressure. Both the housing and the shaft seal must accommodate this high pressure, which raises the cost of the shaft seal and the housing. To relieve the housing (case) pressure, many pumps and motors have an external drain port, commonly referred to as the <em>case drain</em>. It connects from the pump housing to the fluid reservoir. The high pressure-to-case-drain leakage path is identified with the <em>R<sub>LACD</sub></em> algebraic symbol, meaning the leakage goes from Port <em>A</em> to the case drain.</p> <p>At this point symmetry takes over in the assessment of internal leakage. Figure 3 shows a third leakage path symbolized with R<sub>LBCD</sub>. An examination of the pump&rsquo;s innards reveals that if a leakage path exists from the high-pressure region to the case, then a similar path must exist between the low-pressure inlet port and the case. Such a path does exist, and its effects can be measured, for instance, when both the outlet port and inlet port are at high or relatively high pressure, as can be the case in the hydrostatic transmission. The leakage resistance loss coefficients are symbolized with <em>R<sub>L</sub></em><strong>, </strong>followed by an identifier extension on the subscript. The higher the leakage resistance, the lower the internal leakage at a given pressure, and the more efficient the pump.</p> <div class="formulas" style="border-top:1px solid #000000; border-left:1px solid #000000; border-right:1px solid #000000;"> <h3>Differentiating Between Ports</h3> </div> <div class="formulas" style="border:1px solid #000000;"> <p>Clearly, the hydraulic pump is an input-output device: mechanical power in and hydraulic power out. But the two-port concept brings up a contradiction between electrical and hydraulic nomenclature. With electrical systems, the port in two-port concept actually consists of two separate points at which two separate wires are connected. Yet, it is the connection pair that is called a port. Similarly, the high- and low-pressure points at which hydraulic plumbing is connected comprise two separate hydraulic ports (external connection points), but only one port in the electrical two-port context.</p> <p>The term <em>port</em> used in this discussion is a single point at which an external connection is to be made. That is, the hydraulic context will be used. The subject is brought up to clarify the situation where readers are interested in understanding more about two-port theory in the electrical context. It&rsquo;s intended to reconcile the two different interpretations of what a port is.</p> </div> <p><a href="http://sourceesb.com" target="_blank"><img alt="" src="/site-files/globalpurchasing.com/files/uploads/2016/07/15/SourceESB_Lookin_For_Parts_Banner.jpg" style="width: 600px; height: 46px;" /></a></p> <table border="0" cellpadding="0" cellspacing="0" width="570"> <tbody> <tr> <td width="41"><img src="http://insidepenton.com/electronic_design/adobe-pdf-logo-tiny.png" /></td> <td style="padding-left: 0px;" width="459"><a href="/datasheet/hydraulic-electrical-analogies-transmission-comparisons-part-1-pdf-download">Download this article in .PDF format</a><br /> This file type includes high resolution graphics and schematics when applicable.</td> </tr> </tbody> </table> <style type="text/css">.formulas {background-color:#CCFFFF; padding:10px; width:575px;} @media only screen and (max-width: 578px) { .formulas {width:95%;} } <style> </style> <div>&nbsp;</div> </style></div> http://hydraulicspneumatics.com/hydraulic-pumps-motors/hydraulic-electrical-analogies-transmission-comparisons-part-1#comments Hydraulic Pumps & Motors Thu, 15 Dec 2016 19:38:00 +0000 41151 at http://hydraulicspneumatics.com