Hydraulics & Pneumatics - Hydraulics & Pneumatics is the leading international technical resource for fluid power http://hydraulicspneumatics.com/rss.xml en White paper discusses processor power and energy efficiency http://hydraulicspneumatics.com/blog/white-paper-discusses-processor-power-and-energy-efficiency <div class="node-body blog-body"><p>AutomationDirect recently released a&nbsp; white paper titled, &ldquo;Processor Power and Energy Efficiency&rdquo;, which explains how consumer electronic microprocessor improvements also provide a catalyst for industrial automation advancements.<br /> &nbsp;<br /> <a href="library.automationdirect.com/white-paper-process-power-efficiency/"><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/AutoD.jpg" style="width: 222px; height: 285px; float: right; margin-left: 3px; margin-right: 3px;" /></a>Modern electronic devices, such as smart phones, tablets, etc. can be used to perform myriad tasks, including messaging, photos, videos, music, alarms, day planners, GPS and more. The same trend of combining what once required several components into one device is also apparent in industrial automation.<br /> &nbsp;<br /> The white paper explains that while energy efficiency is vital for consumer electronics, new powerful chips offer many advantages to the automation world in terms of price, time-to-market, flexibility and reliability. This is evident in modern PLCs. The integration of more components into microprocessors has eliminated the need for additional external automation components. These components include, but are not limited to, data loggers, ASCII or math co-processors, digital communication cards, proportional-integral-derivative (PID) controllers and more.<br /> &nbsp;<br /> The white paper explains how consolidating functionality into fewer components also creates lower overall costs and power usage for the total system, while providing easier integration and greater reliability.<br /> &nbsp;<br /> <em>Download a copy of the white paper as a PDF by clicking <strong><a href="http://library.automationdirect.com/white-paper-process-power-efficiency/" target="_blank">here</a></strong>.</em></p> <p><em>AutomationDirect is a distributor offering thousands of industrial automation products for pneumatic and electrical control systems, including PLCs, operator interfaces, AC drives, motors, stepper systems, sensors, motor controls, enclosures and more. For more information, call (800) 633-0405 or visit <strong><a href="http://www.automationdirect.com" target="_blank">www.automationdirect.com</a></strong>.</em></p> </div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/fluid-power-talk">Fluid Power Talk</a></li> </ul></div> http://hydraulicspneumatics.com/blog/white-paper-discusses-processor-power-and-energy-efficiency#comments Controls & Instrumentation Fluid Power Talk Tue, 30 Sep 2014 18:01:00 +0000 28901 at http://hydraulicspneumatics.com Bimba's new IntelliSense technology provides predictive intelligence for pneumatics http://hydraulicspneumatics.com/controls-instrumentation/bimbas-new-intellisense-technology-provides-predictive-intelligence-pneumat <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/BIM-Cylinder_v15.jpg" style="width: 222px; height: 306px; float: right; margin-left: 0px; margin-right: 0px;" />Bimba Mfg., a manufacturer of pneumatic, electropneumatic, and electromechanical automation products and systems&nbsp; today introduced <strong><a href="http://www.bimba.com/smarter/" target="_blank">IntelliSense</a></strong>, a technology platform that will let users to be proactive about maintenance and system optimization. IntelliSense combines sensors, cylinders, and software to deliver real-time performance data, enhancing productivity without sacrificing quality or efficiency.</p> <p>&ldquo;In today&rsquo;s competitive global market, manufacturers are under intense pressure to meet their production targets,&rdquo; says Tom Wood, Director of Marketing at Bimba, University Park, Ill. &ldquo;Machines running at maximum load are increasing wear on pneumatic components and are more likely to break down, compromising operational efficiency. Bimba created IntelliSense to deliver precise and accurate performance-related data with which users can make smarter decisions to ensure maximum uptime and component effectiveness.&rdquo;</p> <p>IntelliSense is an example of the <strong><a href="http://www.mckinsey.com/insights/high_tech_telecoms_internet/the_internet_of_things" target="_blank">Internet of Things</a></strong>, the <strong><a href="http://www.greenbiz.com/blog/2014/08/18/industry-4-next-wave-embedded-machines" target="_blank">Industry 4.0</a></strong> movement that is linking machines and their components to technology platforms.&nbsp; In helping to create intelligent production systems that communicate real-time information to evaluate the potential life cycle of pneumatic components, Bimba is showing that industry and technology can be combined to help manufacturing reach its full potential.</p> <p>The intelligence of IntelliSense is embedded inside a Sensor Interface Module (SIM), a remote monitoring device connected to sensors attached to Bimba cylinders using pneumatic fittings. Users receive operational insights about cylinder condition, cycle time, pressure (to 0.01 psi), and temperatures (down to 0.01&deg;).</p> <p>In addition, IntelliSense delivers predictive intelligence for pneumatics in the form of up-to-date condition information that predicts when a cylinder will fail. IntelliSense can also identify when a component is achieving its desired performance specification. For example, users will be alerted if a cylinder that should be actuating in 1 second is taking 1.5 seconds. This is especially important in sequencing applications that depend on precise stroke rates. Ultimately, this machine-to-machine technology lets users&nbsp; move from emergency repair to proactive maintenance, thus optimizing production as a whole.</p> <p>IntelliSense is compatible with Bimba cylinders in pneumatic systems, but the company plans to extend its capabilities to other Bimba products in the future.</p> <p><em>For more information, call </em>(800) 442-4622 or <em>visit <strong><a href="http://www.bimba.com/smarter/" target="_blank">www.bimba.com/smarter</a></strong>, where you can sign up for a free demo. <strong><a href="http://www.bimba.com/Global/Library/Brochures/IntelliSense_eBrochure.pdf" target="_blank">Click here</a></strong> to download a brochure, or <strong><a href="http://www.bimba.com/Global/Library/Whitepapers/Maintenance_Strategies_for_Pneumatic_Actuators.pdf" target="_blank">click here</a></strong> to download a white paper on the subject.</em></p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/controls-instrumentation/bimbas-new-intellisense-technology-provides-predictive-intelligence-pneumat#comments Controls & Instrumentation Cylinders & Actuators Tue, 30 Sep 2014 04:01:00 +0000 28891 at http://hydraulicspneumatics.com The Key to Understanding - And Troubleshooting - Hydraulic Cylinder Drift http://hydraulicspneumatics.com/blog/key-understanding-and-troubleshooting-hydraulic-cylinder-drift <div class="node-body blog-body"><p>Some time ago I recorded <a href="http://www.hydraulicsupermarket.com/flash/cyl_drift_video.html">a simulation video which explains what happens when the piston-seal on a double-acting cylinder leaks, and it becomes a displacement cylinder</a>. After watching the video, Larry from Canada sent me this in response:<br /> <br /> <em>&quot;I enjoyed your video about cylinder drift not being caused by oil leaking past the seals. But I have to ask the same question as your previous sceptic: why do they have seals? If the seals are bad the oil is going to pass from the side under load to the other side. Doesn&#39;t matter if the pressure is the same or not. The load on the cylinder rod will move it and the oil will bypass the seals. If not, why do cylinder rods drift lower under load?&quot;</em><br /> <br /> I replied as follows:<br /> <br /> &#39;Hi Larry,<br /> <br /> You&#39;re not ready for the answer to the second question until you understand the answer to the first.<br /> <br /> Fill a bucket with water to the brim.<br /> <br /> Now plunge your arm into the bucket until your fist hits the bottom.<br /> <br /> What happens?<br /> <br /> Your arm displaces water from the bucket.<br /> <br /> But what if that displaced water had NO way of escaping from the bucket?<br /> <br /> Do you still think you could get your fist to the bottom of the bucket?<br /> <br /> Think about it.<br /> <br /> And if necessary, watch the video again.&#39;<br /> <br /> This &#39;flicked the switch&#39; for Larry almost immediately, and he responded:<br /> <br /> <em>&quot;Thanks for the reply Brendan; I now understand. As my arm enters the bucket or the rod enters the cylinder they have to displace the water or oil which they cannot due to them being in an enclosed container. So is it safe to assume the oil is leaking back through the valve to allow the cylinder and load to drift down?&quot;</em><br /> <br /> That&#39;s pretty much it in a nutshell... when the load is acting to retract the piston-rod (positive load).<br /> <br /> And if you haven&#39;t seen it yet, you can <a href="http://www.hydraulicsupermarket.com/flash/cyl_drift_video.html">watch the simulation video here</a>.</p> </div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div> http://hydraulicspneumatics.com/blog/key-understanding-and-troubleshooting-hydraulic-cylinder-drift#comments Hydraulics At Work Mon, 29 Sep 2014 22:10:00 +0000 28881 at http://hydraulicspneumatics.com The Pressure-Flow Conundrum And What It Means For Hydraulic Machine Reliability http://hydraulicspneumatics.com/blog/pressure-flow-conundrum-and-what-it-means-hydraulic-machine-reliability <div class="node-body blog-body"><p>In most hydraulic fluid power applications there are essentially two ways to get the required power output: high flow at low pressure; and low flow at high pressure. This is of course because power is a product of flow and pressure; increase pressure and you can reduce flow proportionately but still get the same power output. For example, 100 liters/minute at 200 bar equates to the same power output as 50 liters/minute at 400 bar.<br /> <br /> Higher pressures mean higher force and torque is available from smaller components. And because the components are smaller in displacement, higher speeds are possible from smaller flows. Smaller flows mean pipework, valving and even the tank can be made smaller - remember, the old rule of thumb for tank size, which is largely ignored these days, is 3 to 5 times pump flow per minute.<br /> <br /> So the power density of individual components and the system as a whole increases with pressure. But there are a number of disadvantages with higher operating pressures. These include:</p> <ul> <li> The inherent heat dissipation of the system is lower due to the reduced surface area of the tank (it&#39;s smaller in volume), pipework and components. In other words, a bigger heat exchanger is required for a high-pressure system of the same power and efficiency.</li> <li> Greater variation in fluid volume (compression) at higher pressures means reduced stiffness of the system and less favorable dynamic response.</li> <li> Higher noise levels as a result of higher peak pressures.</li> <li> The potential for greater friction and wear, resulting from heavier loads on bearings and sliding surfaces, and more severe damage resulting from aeration, cavitation and micro-dieseling due to higher compression ratios.</li> <li> Increased potential safety hazard from components and conductors containing fluids at higher pressures.</li> </ul> <p>In the majority of applications though, the advantages presented by higher operating pressures outweigh the disadvantages. Which is why for several decades now, we&#39;ve seen the average operating pressures of hydraulic equipment - particularly mobile hydraulic equipment, increase. And this is a trend which is expected to continue. But clearly, it comes with some design problems. Here&#39;s a few that come to mind:</p> <ul> <li> Heavier hose construction, i.e., less flexible lines, longer bend radii and possibly, special fittings and assembly methods.</li> <li> Heavier valve bodies, actuators, pumps, pipes -- or the use of more exotic, and expensive, materials in their construction.</li> <li> More advanced seal materials, new groove designs and closer tolerances - to ensure sealing integrity doesn&#39;t suffer.</li> </ul> <p>But beyond these design and material-strength issues, also consider for a moment how higher operating pressures impacts machine reliability. We know that force in a hydraulic system is a product of pressure and area. So when operating pressure increases - so do loads on lubricated surfaces.<br /> <br /> Oil viscosity and film strength are vital to maintain full-film lubrication between heavily loaded contacts. I already consider the oil to be THE most important component of any hydraulic system. But this will definitely be the case for machines operating at increased pressures. Oil selection AND maintenance will be critical for optimum reliability.<br /> <br /> Similarly, contamination control will be more important than ever. Because the more heavily loaded the lubricated contacts - the more susceptible they are to wear and damage from water and particle contamination.<br /> <br /> For machine designers, issues such as tank size, installed cooling capacity, filtration, contamination control, and oil recommendations will be even more important than they are now. Because the impact of mistakes or omissions in these areas at the design stage will have an even greater impact on machine reliability.<br /> <br /> For hydraulic equipment users whose maintenance practices are unsophisticated or non-existent - their hydraulic equipment operating costs can only go up! Due to a likely higher incidence of premature failures resulting from temperature, lubrication, oil degradation and contamination issues.<br /> <br /> And if you&#39;d like a checklist for improving the reliability of your hydraulic machines, get <a href="http://www.hydraulicsupermarket.com/track?p=handp&amp;w=smr">&quot;Six Costly Mistakes Most Hydraulics Users Make... And How You Can Avoid Them!&quot; available for FREE download here.</a></p> </div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div> http://hydraulicspneumatics.com/blog/pressure-flow-conundrum-and-what-it-means-hydraulic-machine-reliability#comments Hydraulics At Work Mon, 22 Sep 2014 22:50:00 +0000 28871 at http://hydraulicspneumatics.com AutomationDirect is STEM Education Awards Finalist http://hydraulicspneumatics.com/events/automationdirect-stem-education-awards-finalist <div class="field-byline"> Edited by Alexis Coffey </div> <div class="node-body article-body"><p>The Technology Association of Georgia (TAG) announced AutomationDirect as a Finalist in the Corporate Outreach Category for the 2014 STEM Education Awards.</p> <p>For the past nine years AutomationDirect has funded local competition robotics teams in Forsyth County, GA and the surrounding school systems. Funding is primarily used for STEM (Science, Technology, Engineering and Math) activities such as ensuring robotics teams and competitions in the area.</p> <p>Winners will be announced at the 3<sup>rd</sup> annual STEM Education Awards, September 26<sup>th</sup>, at the Savannah International Trade and Convention Center.</p> <p>For more information please follow the links:</p> <p><a href="http://www.automationdirect.com/adc/Home/Home" target="_blank">AutomationDirect</a></p> <p><a href="http://www.stemedcoalition.org/" target="_blank">STEM</a></p> <p><a href="http://www.tagonline.org/" target="_blank">TAG</a></p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/events/automationdirect-stem-education-awards-finalist#comments Events Tue, 16 Sep 2014 15:35:00 +0000 28861 at http://hydraulicspneumatics.com Ductile Iron Seminar Coming Soon http://hydraulicspneumatics.com/events/ductile-iron-seminar-coming-soon <div class="field-byline"> Alexis Coffey </div> <div class="node-body article-body"><p>The Ductile Iron Society will host a ductile iron seminar, October 28<sup>th</sup>, at the Decatur Conference Center &amp; Hotel, Decatur, Il. This one-day only event is a learning opportunity for OEM and end-user personnel, design &amp; application engineers, and management. The seminar will highlight the benefits and advantages to using ductile iron for weight reduction, improvement in material properties, and replacement of weldments. Sessions include ductile iron basics, casting design and conversions, machining, heat-treating, and a Q&amp;A.</p> <p>The seminar is free and limited to 75 attendees.</p> <p><em><strong><a href="https://netforum.avectra.com/eweb/Shopping/Event/Registration.aspx?Site=DIS&amp;WebCode=Re gistration&amp;prd_key=5e5c8d42-0a88-4e86-95e0-0933f9632921." target="_blank">Click here</a></strong></em> for early registration.</p> <p>To learn more about the Ductile Iron Society visit <a href="http://www.ductile.org" target="_blank">www.ductile.org</a></p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/events/ductile-iron-seminar-coming-soon#comments Events Tue, 16 Sep 2014 13:34:00 +0000 28851 at http://hydraulicspneumatics.com The Hydraulic Fluid's Best Friend? http://hydraulicspneumatics.com/blog/hydraulic-fluids-best-friend <div class="node-body blog-body"><p>Hydraulic fluid has a BIG job to do. It&#39;s a power transmission device, a lubricant, a heat transfer medium - and even a sealant, in some hydraulic components at least. And this is why I consider the fluid to be THE most important component of a hydraulic system. And certainly not something to be purchased on price alone.<br /> <br /> But regardless of whether the hydraulic fluid you use is a synthetic, high VI, ashless, zinc-free, multigrade or monograde -- or any other of the many options available today, to do its job well, the hydraulic fluid needs help from its friends.&nbsp; The first of these, and possibly the hydraulic fluid&#39;s BEST friend, is the reservoir or tank.<br /> <br /> <strong>Size Matters</strong><br /> <br /> Traditionally, recommended tank size for mineral hydraulic oil has been 3 to 5 times Q plus a 10 percent air cushion. Where Q is pump flow per minute - or mean pump flow per minute where a variable pump is used. For some special fluids, recommended tank size is even larger. For example, for hydraulic systems using HFC and HFD fluids, a tank volume of 5 to 8 times Q is recommended.<br /> <br /> The thing is, the above formulas were not devised to sell more oil or to increase the extent of the spill risk. They were devised with hydraulic-system performance and reliability in mind. But these days, with increasing demand for lighter, more compact hydraulic equipment - particularly in mobile markets, tank oil-volumes of this order are becoming a thing of the past.<br /> <br /> If tank oil-volume or more precisely, the lack of it, affects hydraulic system performance and reliability, then it follows that less than ideal tank volume compromises the hydraulic fluid. How? Well, in order to answer this question, the traditional functions of the hydraulic tank - and how these functions can (or can not) be subrogated to the hydraulic fluid&#39;s other &#39;friends&#39; in the system - must be considered.<br /> <br /> Beyond its most basic role of providing a store of fluid, the main functions of the hydraulic tank are to:</p> <ul> <li> &nbsp;&nbsp;&nbsp; dissipate heat; and</li> <li> &nbsp;&nbsp;&nbsp; allow contaminants to settle out of the oil.</li> </ul> <p>In practice, the amount of heat dissipated from even a large tank is relatively small, so this function is easily and more efficiently subrogated to a heat exchanger. And when it comes to contaminants, the tank&#39;s role in settling out particles and water can be largely subrogated to the hydraulic system&#39;s filters.<br /> <br /> This leaves one important function of the tank for which there is no clear substitute - other than adequate oil volume and therefore dwell time. And that is the release of entrained air. Air entrained in hydraulic fluid affects the performance and reliability of the hydraulic system in a number of ways, including:</p> <ul> <li> &nbsp;&nbsp;&nbsp; reduced bulk modulus, resulting in spongy operation and poor control system response;</li> <li> &nbsp;&nbsp;&nbsp; increased heat-load;</li> <li> &nbsp;&nbsp;&nbsp; reduced thermal conductivity;</li> <li> &nbsp;&nbsp;&nbsp; increased oxidation and thermal degradation (micro-dieseling) of the fluid;</li> <li> &nbsp;&nbsp;&nbsp; reduced fluid viscosity, which leaves critical surfaces vulnerable to wear;</li> <li> &nbsp;&nbsp;&nbsp; increased noise levels; and</li> <li> &nbsp;&nbsp;&nbsp; decreased system efficiency.</li> </ul> <p>I&#39;ve seen a lot of anecdotal evidence which suggests skimping on tank volume compromises hydraulic system reliability. One example that comes to mind is a hydraulic excavator manufacturer who, after increasing tank size and installed cooling capacity, saw typical pump life increase from 12,000 to 20,000 hours! This reinforces the point that no matter how good the hydraulic fluid is, it needs help from its friends.<br /> <br /> <strong>Non-Conventional Tank Designs</strong><br /> <br /> In the past, when it comes to air release, there really hasn&#39;t been a substitute for the dwell time facilitated by sufficient oil volume. But these days, there are a number of alternative tank designs which promise large reductions in oil volume without compromising release of air from the oil. The cylindrical reservoir design is an example of these.<br /> <br /> <strong>Think Tank</strong><br /> <br /> So if you design or build hydraulic equipment and you care about its reliability (and you should) don&#39;t skimp on tank volume, or be cheap about the tank&#39;s design and construction. If on the other hand, you service and maintain hydraulic equipment, there is little that can be done - economically at least, about installed tank volume - or the lack of it. But you can specify minimum required tank volume when ordering new equipment.<br /> <br /> And don&#39;t forget, the tank, like the hydraulic system&#39;s heat exchanger and filters, must be taken care off. This involves regular drain-off of settled contaminants and occasional internal cleaning. Because to do its job effectively, the hydraulic fluid needs a lot of help from its friends.<br /> <br /> For more on improving the efficiency AND reliability of your hydraulic machines, get <a href="http://www.hydraulicsupermarket.com/track?p=handp&amp;w=smr">&quot;Six Costly Mistakes Most Hydraulics Users Make... And How You Can Avoid Them!&quot; available for FREE download here</a>.</p> </div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div> http://hydraulicspneumatics.com/blog/hydraulic-fluids-best-friend#comments Hydraulics At Work Mon, 15 Sep 2014 22:57:00 +0000 28841 at http://hydraulicspneumatics.com Troubleshooting Challenge: Eroded Construction Plug Causes Manifold Leak http://hydraulicspneumatics.com/other-industries/troubleshooting-challenge-eroded-construction-plug-causes-manifold-leak <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Crushed-plugWEB.jpg" style="width: 300px; height: 300px; margin: 5px; float: right;" />A mill that produces oil-field pipe is required to hydrostatically test the pipe with water according to ASTM standards. They used a hydraulically driven water intensifier to fill and test the pipe at pressure to 2,500 psi. They decided to add a second intensifier that could achieve higher pressure, but at lower flow. Using both intensifiers at the same time let them fill the pipe quicker. Then when the water pressure reached 2,500, the new intensifier took over to apply pressure to 4,000 psi.</p> <p>A manifold was designed to allow selecting one intensifier, the other, or both at the same time. The intensifiers could supply maximum flow of 125 gpm, but the return flow back to tank exceeded 300 gpm.</p> <p>The system was installed and running for a couple of years until one of the SAE O-ring construction plugs began to leak. The maintenance crew tightened the plug, but leakage increased. After removing the plug to replace the O-ring, they found the plug had been damaged, as shown in the photo. The manifold threads were also damaged, so they decided to drill and tap four holes and installed a four-bolt, Code 62, flange with an O-ring and plug to cover the construction hole.<br /> &nbsp;</p> <table align="left" border="1" cellpadding="1" cellspacing="1" style="width: 500px;"> <tbody> <tr> <td> <h3> Find the solution</h3> <p>Think you know the answer to this month&rsquo;s problem? You can submit solutions by e-mailing Mindy Timmer at <a href="mailto:timmer@cfc-solar.com">timmer@cfc-solar.com</a>. All correct solutions submitted by October 6, 2014, will be entered for a chance at a $50 gift card.&nbsp; We will randomly select a winner from all correct submissions. The winner will be notified, and his or her name will be printed in a future issue. Congratulations to Dave Lloyd, CFPHS, at Flodraulic Group, Westland, Mich., whose entry was chosen at random from those who correctly answered our June 2014 Troubleshooting Challenge.</p> </td> </tr> </tbody> </table> <p>&nbsp;</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/other-industries/troubleshooting-challenge-eroded-construction-plug-causes-manifold-leak#comments Other Industries Tue, 09 Sep 2014 14:49:00 +0000 28811 at http://hydraulicspneumatics.com Electronic indicating transmitter/switch http://hydraulicspneumatics.com/products/electronic-indicating-transmitterswitch-0 <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Noshok-800-810-Press-Switches.gif" style="width: 250px; height: 264px; margin: 5px; float: right;" />The 800/810 Series of electronic indicating transmitter/switch are designed for use in hydraulic systems. The stainless-steel 800 version and the black-anodized-aluminum 810 model provide continuous pressure monitoring, allowing programming of setpoints. Features include compound and standard ranges through 10,000 psi, stainless-steel wetted parts, contact types (npn/pnp), switching function (hysteresis/gate), 330&deg; rotatable display head, four-digit LED, and scalable analog output.<br /> The devices offer three switching output options: two switching outputs; one switching and one analog output (4 to 20 mA or 0 to 10 Vdc); and two switching and one analog output (4 to 20 mA).<br /> <a href="http://www.noshok.com" target="_blank"><strong>Noshok Inc.</strong></a>, (440) 243-0888</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/electronic-indicating-transmitterswitch-0#comments Products Tue, 09 Sep 2014 14:41:00 +0000 28801 at http://hydraulicspneumatics.com Diagnostic tool “hears” problems http://hydraulicspneumatics.com/products/diagnostic-tool-hears-problems <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Spectronics-MDE-2000NC-Marksman-II.gif" style="width: 250px; height: 200px; margin: 5px; float: right;" />The MDe-2000 NC Marksman II ultrasonic diagnostic tool converts and amplifies inaudible ultrasonic sounds into audible sound, allowing technicians to &ldquo;hear&rdquo; pressurized-gas leaks before they become a problem. A five LED-signal intensity indicator and audible alarm pinpoint the source of the problem. An internal noise control feature safeguards against ambient noise. The Marksman II comes with an ultrasonic receiver; full-sized, heavy-duty, noise-canceling headphones; a hollow air probe; and a solid contact probe.<br /> <a href="http://www.spectroline.com" target="_blank"><strong>Spectronics Corp.</strong></a>, (800) 274-8888</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/diagnostic-tool-hears-problems#comments Products Tue, 09 Sep 2014 14:37:00 +0000 28791 at http://hydraulicspneumatics.com Radial-piston pumps http://hydraulicspneumatics.com/products/radial-piston-pumps <div class="node-body article-body"><p>The RKP 250 variable-<img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Moog-19-cm-Pump_1.gif" style="width: 250px; height: 189px; margin: 5px; float: left;" />displacement radial-piston pumps come in displacements up to 250 cm&sup3;/rev. The delivers continuous pressures up to 350 bar (5,000 psi).</p> <p>For machine applications requiring even higher displacements, it can be configured in a double-pump arrangement with full torque available across all displacements up to 500 cm&sup3;. Designed to be used in open-circuit systems, the RKP 250&rsquo;s large suction port and flow-optimized suction path ensure robust suction behavior, a hi<img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Moog-250-cm-Pump.gif" style="width: 250px; height: 187px; margin: 5px; float: right;" />gh speed limit, and low noise emission. The pump&rsquo;s maximum speed is 1,800 rpm at an inlet pressure of 0.8 bar absolute (11.6 psia). The pump incorporates a nine-piston rotary group, which provides very-low pressure ripple and noise-emission behavior.<br /> <a href="http://www.moog.com" target="_blank"><strong>Moog</strong></a>, (716) 652-3686</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/radial-piston-pumps#comments Products Tue, 09 Sep 2014 14:29:00 +0000 28781 at http://hydraulicspneumatics.com Pressure transducer for heavy-duty applications http://hydraulicspneumatics.com/products/pressure-transducer-heavy-duty-applications <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/MeasurementSpec-U5300-Transducer.gif" style="width: 250px; height: 167px; margin: 5px; float: right;" />The U5300 pressure transducer features accuracy with a total error band of &plusmn;0.5% F.S. The unit offers design flexibility with a variety of pressure ports and electrical configurations available for low to medium-volume OEM applications. The transducer is made of 316L stainless steel, has no O-rings, or welds.<br /> Additional features include &plusmn;0.1% accuracy F.S. BFSL, pressure range from 0 to 15 psi through 0 to 10,000&nbsp;psi, withstands shock to 50&nbsp;<em>g</em> for 11 msec half-sine per MIL-STD-202G as well as vibration of &plusmn;20 <em>g</em> according to MIL-STD-810C; comes in gauge, sealed, absolute, or compound configurations, and exceeds current heavy industrial CE requirements, including surge protection.<br /> <a href="http://meas-spec.com/product/pressure/U5300.aspx" target="_blank"><strong>Measurement Specialties</strong></a>, (800) 745-8008</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/pressure-transducer-heavy-duty-applications#comments Products Tue, 09 Sep 2014 14:26:00 +0000 28771 at http://hydraulicspneumatics.com PM hydraulic pumps http://hydraulicspneumatics.com/products/pm-hydraulic-pumps <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Poclain-PM-Hydraulic-Pump.gif" style="width: 200px; height: 195px; margin: 5px; float: right;" />The PM line of closed-loop hydraulic pumps are designed for medium-duty applications. Features of the variable-displacement pumps include 25 to 65&nbsp;cc/rev displacement, 3,600 maximum speed, 350-bar pressure, and 125-kW maximum power.<br /> <a href="http://www.poclain-hydraulics.com" target="_blank"><strong>Poclain Hydraulics Inc.</strong></a>, (262) 321-0676</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/pm-hydraulic-pumps#comments Products Tue, 09 Sep 2014 14:03:00 +0000 28761 at http://hydraulicspneumatics.com Engineered flange seal http://hydraulicspneumatics.com/products/engineered-flange-seal <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Parker-Engineered-Flange-Seal.gif" style="width: 400px; height: 185px; margin: 5px; float: right;" />The engineered Flange Seal (EFS) reduces rework and eliminates replacing O-rings in hose products. The EFS fits the grooves of the company&rsquo;s Code 61 and 62 flanges, eliminating seal popout and leakage.<br /> Additional features include: secure seal retention before, during, and after installation; no tools or lubrication needed; reduced risk of seal damage or leakage; and withstand temperatures up to 257&deg;F.<br /> <a href="http://www.parker.com" target="_blank"><strong>Parker Hose Products Div.</strong></a>, (440) 943-5700</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/engineered-flange-seal#comments Products Tue, 09 Sep 2014 13:59:00 +0000 28751 at http://hydraulicspneumatics.com Mini wireless controls http://hydraulicspneumatics.com/products/mini-wireless-controls <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Magnetek-Enrange-Controls.gif" style="width: 350px; height: 433px; margin: 5px; float: left;" />Enrange wireless controls are lightweight, mini transmitters that control small fluid-powered machines. The line consists of three easy-to-configure units. The Flex Mini is for applications requiring simple control operations: up to eight pushbuttons for on/off control with a new pairing feature that increases uptime.<br /> The ergonomically styled Mini-MBT is said to be the smallest and lightest bellybox control available. It offers the same capabilities as larger bellybox transmitters, including toggle switches, potentiometers, graphic display, two-way feedback, and a fully proportional control option.<br /> The Mini-PGT is a pistol-grip transmitter that features a strong, ergonomically designed handle and its LCD screen shows easy-to-read, detailed feedback.<br /> <a href="http://www.magnetekmobilehydraulic.com" target="_blank"><strong>Magnetek Inc.</strong></a>, (800) 288-8178</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/mini-wireless-controls#comments Products Tue, 09 Sep 2014 13:55:00 +0000 28741 at http://hydraulicspneumatics.com Balanced solenoid valves http://hydraulicspneumatics.com/products/balanced-solenoid-valves <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Humphrey-193-Solenoid-Valve.gif" style="width: 350px; height: 262px; margin: 5px; float: right;" />The 193 Series of balanced solenoid valves are the new 19-mm version of the company&rsquo;s 15-mm 153 Model. Each three-port valve offers significantly more flow than the 153 (153 offers 0.25 <em>C<sub>v</sub></em>; 193 offers 0.65 <em>C<sub>v</sub></em>), while fitting into tight spaces.<br /> The 193&rsquo;s balanced-poppet design neutralizes internal forces generated by the pressurized media. Features include two or three-way service, NO or NC function; diverter function; selector function; works with either clean or air with impurities; and applicable from vacuum to 125 psi.<br /> <a href="http://www.humphrey-products.com" target="_blank"><strong>Humphrey Products Co.</strong></a>, (269) 381-5500</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/balanced-solenoid-valves#comments Products Tue, 09 Sep 2014 13:46:00 +0000 28731 at http://hydraulicspneumatics.com Linear-position sensor for extreme environments http://hydraulicspneumatics.com/products/linear-position-sensor-extreme-environments <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Alliance-LA-25-A-LVDT.gif" style="width: 250px; height: 104px; margin: 5px; float: right;" />The LA-25-A LVDT linear-position sensor handles hostile environments. It features a 1-in.-diameter heavy-wall housing of aluminum or stainless steel; two double-contact shaft seals to keep fluids and contaminants out of the bore; a choice of axial connectors or a cable in a metal cord grip; comes in ranges from 3 to 15 in. (75 to 375 mm); and operates to 220&deg;F (105&deg;C). The sensor&rsquo;s core is encased in a <sup>3</sup>/<sub>8</sub>-in.core-extension rod assembly with a <sup>5</sup>/<sub>16</sub>-24 or 8-mm male threaded shaft end, from which it cannot break loose.<br /> <a href="http://www.alliancesensors.com" target="_blank"><strong>Alliance Sensor Group</strong></a>, (856) 727-0250<br /> &nbsp;</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/linear-position-sensor-extreme-environments#comments Products Tue, 09 Sep 2014 13:34:00 +0000 28721 at http://hydraulicspneumatics.com Precision finishing of bores in hydraulic components http://hydraulicspneumatics.com/products/precision-finishing-bores-hydraulic-components <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Engis-Turnkey-Systems.gif" style="width: 200px; height: 258px; margin: 5px; float: right;" />Turnkey systems precision-finish bores of hydraulic components. These systems achieve submicron tolerances on bore geometry with unsurpassed size control. Recent advancements to these systems eliminate costly, time-consuming manual bore lapping operations while achieving near-perfect bore geometry, with sharp, burr-free metering edges.<br /> <a href="http://www.engis.com" target="_blank"><strong>Engis Corp.,</strong></a> (847) 808-9400</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/products/precision-finishing-bores-hydraulic-components#comments Products Tue, 09 Sep 2014 13:29:00 +0000 28711 at http://hydraulicspneumatics.com How To Eliminate Hydraulic Problems: Engineer Them Out http://hydraulicspneumatics.com/blog/how-eliminate-hydraulic-problems-engineer-them-out <div class="node-body blog-body"><p>A large part of being smart in any area of expertise comes from doing your homework. And this is especially true with hydraulics. Here&#39;s a story from one of our readers which illustrates this point pretty well:<br /> <br /> <em>&quot;I&#39;m fairly new to hydraulics and I thought coating the interior of a hydraulic tank I&#39;d made with a zinc spray (cold galvanizing in a spray can, like paint) would be a good idea. The idea was fine but the reality was not so good. I had no way of predicting that the components of the oil would dissolve the zinc coating... I&#39;m fortunate that there is little I can do at this point that would further endanger my soul.&quot;</em><br /> <br /> Call me superstitious, but I&#39;m not a fan of painting the inside of hydraulic tanks, period. To digress for a moment, it reminds of a client a few years back who had a machine with a history of the oil to water heat exchanger failing and contaminating the hydraulic system with water. He asked me what he could do about the problem. When I suggested switching to an oil to air heat exchanger, there was a long pause on the other end of the phone. Followed by: &quot;Why didn&#39;t I think of that!&quot;<br /> <br /> Here&#39;s the thing: engineer out potential problems if you can. If you don&#39;t use an oil to water heat exchanger, cooling water can never contaminate the oil. If you don&#39;t install pump intake isolation valves, the pump will never be started with the valve closed. And if you don&#39;t paint the inside of hydraulic tanks, the paint can never come off.<br /> <br /> Oh sure, all of these thing can be done in such a way that the risk of the worst case scenario happening is minimized. You can specify a double-walled oil to water heat exchanger. You can install proximity switches and interlocks on pump intake isolation valves. And there are paints specially formulated to withstand contact with the myriad of different hydraulic oils out there. Although as far as I&#39;m aware they don&#39;t come with a guarantee. Like I said, the worst case scenario is minimized, but NOT completely eliminated. The risk remains.<br /> <br /> And why should you need to paint the inside of a hydraulic tank anyway? Think about it for a moment. How many other hydraulic components are painted internally? None. Zilch. Nada. So why don&#39;t these components rust? Because the hydraulic oil is formulated with rust inhibitors.<br /> <br /> But the hydraulic tank is different, right? I mean water settles to the bottom and air circulates in the top. Well, make sure the tank has a drain point - and see that it&#39;s used. And if you install a desiccant breather, rust on the inside of the tank&#39;s air space will be minimized, if not eliminated.<br /> <br /> And so what if a bit of light surface rust forms on the inside of the tank anyway? Aside from not looking real pretty how bad can it be? It will likely make a small contribution to contamination load, but the system&#39;s filters will soon take care of this.<br /> <br /> I&#39;ve designed and built hundreds of hydraulic power units. And never painted the inside of a single tank. In some instances, I&#39;ve actively discouraged it. I&#39;ve also worked on many hundreds more built by others. And I&#39;d guesstimate less than two percent of those had the inside of their tanks painted - some successfully and some not.<br /> <br /> Either way, I&#39;m yet to see any evidence that leaving the inside of a hydraulic tank unpainted is detrimental to the system. But as this hydraulics user found out the hard way, painting it can be. Especially if you don&#39;t do your homework first!<br /> <br /> P.S. on the subject of homework, <a href="http://www.hydraulicsupermarket.com/track?p=handp&amp;w=smr">&quot;Six Costly Mistakes Most Hydraulics Users Make... And How You Can Avoid Them!&quot; is essential reading. And it&#39;s available for FREE download here</a>.</p> </div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div> http://hydraulicspneumatics.com/blog/how-eliminate-hydraulic-problems-engineer-them-out#comments Hydraulics At Work Mon, 08 Sep 2014 22:19:00 +0000 28691 at http://hydraulicspneumatics.com Why Risk It with Copycat Hydraulics? http://hydraulicspneumatics.com/hydraulic-pumps-motors/why-risk-it-copycat-hydraulics <div class="field-byline"> Bob Nemeth, Parts &amp; Service Director, Americas, Danfoss Power Solutions </div> <div class="field-deck"> Such components may lack the original manufacturer’s proven quality, performance, and reliability, which makes genuine remanufactured products a considerably more viable option for cost-conscious users. </div> <div class="node-body article-body"><p>When hydraulic components become damaged or reach the end of their useful lives, off-highway machine users can choose from among many replacement options. An increasing number of solutions are available from original equipment manufacturers (OEMs), independent aftermarket suppliers, and remanufacturers. When searching for the best option to minimize downtime and total cost of ownership, users may consider reverse-engineered products that seem identical to the genuine original versions.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Lead_BeforeAfter.jpg" style="width: 585px; height: 220px; margin: 5px; float: left;" title="A Series 90 pump gets new life with Danfoss’s remanufacturing program." />Users expecting quality and performance from replacement products should understand the risk associated with using copycat components, which may not be manufactured and tested to OEM specifications. Before assuming that risk, prospective buyers may want to familiarize themselves with an alternative that continues to gain popularity throughout the off-highway market: remanufactured components from OEMs.</p> <h3> Proven processes</h3> <p><strong>Danfoss Power Solutions</strong> specializes in providing components that perform in the harsh operating conditions of the mobile-equipment environment. Pumps, motors, proportional valves, and other hydraulic components are designed, manufactured, and tested to rigorous standards to optimize performance, reliability, and service life. Manufacturers of reverse-engineered solutions typically don&rsquo;t perform those steps at that level.</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/why-risk-it-copycat-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>Danfoss uses only qualified suppliers and works to improve its products using advanced planning tools. One of these tools &mdash; the control plan &mdash; describes systems for controlling parts and processes. It identifies and documents the part and process controls used to manufacture, assemble, test, paint, handle, and ship as necessary to ensure that the product meets all relevant prints and specifications.</p> <p>Benefits of developing and implementing a control plan include product quality and customer satisfaction. The control plan reduces waste and improves the quality of products through the design, manufacturing, and assembly stages. It helps identify the sources of variation (input variables) in product characteristics (output variables). The plan also focuses resources on processes and products related to characteristics important to customers, reducing cost without sacrificing quality.</p> <p>During control-plan development, Danfoss uses all available information, including system, design, and process failure mode and effect analysis (FMEA). FMEAs ensure that, to the extent possible, potential failure modes and associated causes and mechanisms are considered and addressed. Danfoss control plans, FMEAs, material specs, and many manufacturing processes are proprietary information.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Danfoss_2.jpg" style="width: 400px; height: 267px; margin: 5px; float: left;" title="Inspection of internal components includes three types of gauging: air, contact, and laser micrometer." />Though new or remanufactured reverse-engineered components may appear to be the same as original, they likely haven&rsquo;t been subject to rigid processes and standards to ensure performance, reliability and durability, like those used by Danfoss. As a result, customers who use copycat new or remanufactured components run the risk of product failure leading to increased downtime and cost &mdash; the same issues they try to avoid when poring through replacement options.</p> <h3> Reman on the Rise</h3> <p>Another option &mdash; remanufacturing &mdash; continues to garner more attention among end users who want original manufacturer&rsquo;s time- and cost-saving, genuine-quality solutions. In recent years, remanufacturing in the heavy-duty, off-road sector has jumped by more than 50%.</p> <p>Although the terms are frequently interchanged, &ldquo;remanufactured&rdquo; does not mean &ldquo;repaired.&rdquo; Danfoss employs remanufacturing processes adapted from the company&rsquo;s proven OEM manufacturing methods, ensuring that customers receive products meeting or perhaps exceeding original OEM specifications.</p> <div class="related-content"> <div class="related-label"> <b>Related:</b></div> <p><a href="http://hydraulicspneumatics.com/maintenance/understanding-hydraulic-repair-rebuild-and-remanufacturing-industry-web-exclusive">Understanding the Hydraulic Repair, Build, and Remanufacturing Industry</a></p> </div> <p>Unlike aftermarket suppliers and remanufacturers of reverse-engineered components, Danfoss is a product expert and can rely on their original control plans, FMEAs, material specifications, and qualification testing when remanufacturing products. In addition, Danfoss remanufacturing maintains a connection to the production supply chain, allowing for ready access to new materials and components as necessary.</p> <h3> Rigors of Reman</h3> <p>When a used product (core) arrives at the Danfoss facility, it receives a complete external and internal inspection. The core is disassembled to the component level, identifying worn or damaged parts that need to be remanufactured or replaced. After the remanufactured product is assembled from qualified component stock, it is performance-tested against original Danfoss specifications.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Danfoss_3.jpg" style="width: 400px; height: 299px; margin: 5px; float: right;" title="Original equipment manufacturers rely on stringent remanufacturing systems to produce products that meet, or perhaps exceed, original OEM specifications." />Each remanufactured piston product is fitted with Danfoss Genuine Parts. Consequently, the company can reasonably ensure that the finished product will be of high quality and reliability, as well as offer extended component life and machine uptime, safe equipment operation, and reduced total cost of ownership.</p> <p>Remanufacturing processes at Danfoss are performed on an industrial scale in a factory setting. Advanced Danfoss remanufacturing procedures include many steps, such as (but not limited to):</p> <ul> <li> Soda blasting: This single-pass cleaning process for external and internal surfaces uses sodium bicarbonate to remove grease, oil, paint, and other contaminants to return the product back to bare metal.</li> <li> Laser micrometer and contact gauge inspection: Danfoss teams take advantage of the same types of tools employed in OEM manufacturing processes to verify all dimensions and clearances.</li> <li> Innovative recovery technology: Proprietary technology enables reconditioning of the heart of the unit.</li> <li> Coordinate measuring machine (CMM): On-site CMM capability to validate measurements of reconditioned components.</li> <li> Expert assembly: Members of the assembly team average 25 years of experience with the company.</li> <li> Tool and gauging repair: Capability to produce its own tooling and gauging as well as in-house capability for tooling repair.</li> <li> Cleanliness testing: Danfoss checks test stands on a weekly basis to ensure that cleanliness is at specified levels for particle size and content.</li> <li> Qualification via test stand: Qualification testing requires that remanufactured products meet original test specifications 100% of the time.</li> </ul> <p>Remanufacturing is not a repair service. Rather, it is a careful sequence of manufacturing processes that results in a quality product.</p> <h3> Rewards of Reman</h3> <p>Customers can manage input costs, lower total ownership costs, and extend machine life by using remanufactured components. When core material is recovered, the price of reman typically runs about 30% less than equivalent new products.</p> <p>Customers expect short lead times, especially when the need for a product is unforeseen. Danfoss remanufacturing, machining, and assembly operations result in shorter lead times than that of a new product. A distributor or authorized service center typically can provide a factory-remanufactured unit within 24 hours &mdash; if not off the shelf &mdash; minimizing machine downtime.</p> <p>Remanufacturing can be beneficial through the entire product life cycle, from component suppliers to manufacturers to consumers, to even the environment. Remanufacturing is a form of recycling that makes optimal use of resources while minimizing waste.<br /> When an off-highway hydraulic machine, for instance, needs replacement components, reverse-engineered products from independent aftermarket suppliers may appear to be ideal. However, such suppliers may not replicate the quality and performance of an original equipment manufacturer&rsquo;s genuine offerings that endured proven manufacturing processes. Rather than face the risk of component failure associated with copycat products, users may want to seriously consider genuine remanufactured components designed, manufactured, and tested to perform just like new.</p> <p>BOB NEMETH is Parts &amp; Service Director, Americas for Danfoss Power Solutions. For more information, call (515) 239-6000, or visit <em>parts-service.danfoss.com</em>.</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/hydraulic-pumps-motors/why-risk-it-copycat-hydraulics#comments Hydraulic Pumps & Motors Hydraulic Valves Mon, 08 Sep 2014 19:32:00 +0000 28681 at http://hydraulicspneumatics.com Hydraulic Mulcher Puts Land-Clearing Into High Gear http://hydraulicspneumatics.com/forestry-lumber/hydraulic-mulcher-puts-land-clearing-high-gear-0 <div class="field-deck"> Forestry applications — both in the field and in processing plants — require the brute force and precise positioning of hydraulics technology. </div> <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/2014.09-Lead-photo_0.jpg" style="width: 250px; height: 372px; margin: 5px; float: left;" title="A Shinn Systems Tree Mulcher makes short work of a tree." />Land-clearing operations frequently process plant clippings, tree branches, and other debris by mulching. Hydraulic drives built into professional-grade mulchers deliver the high torque and dead-on speed control needed to quickly and efficiently turn such debris into a pile of mulch for composting, landscaping, or other form of recycling.</p> <p>However, branches cut from the tree often must be hauled to the mulcher&rsquo;s location. This may not seem significant, but consider that a mulcher can turn tree branches into a pile of chips in less time than it takes a team of workers to cut branches from trees and drag them to the mulcher.</p> <p>The Tree Mulcher, designed and built by <a href="http://www.shinncutter.com" target="_blank"><strong>Shinn Systems Inc.,</strong></a> Concord, N.C., overcomes this limitation. An attachment for full-size excavators, the Tree Mulcher reduces trees, branches, etc., to a pile of mulch right at the work site &mdash; and requires only a single operator. It clears construction sites, utility right-of-ways, and recreational areas, and is particularly useful in wet areas or sites with limited access. Basically, it travels through an area and clears anything in its path, leaving a bed of mulch in its wake.</p> <h3> A clear edge over convention</h3> <p>Perhaps the Tree Mulcher&rsquo;s biggest advantage over conventional clearing methods is that just one person can clear twice the number of trees per day as a five-person crew with chainsaws, chippers, and excavators. It also operates in wet areas where it&rsquo;s nearly impossible for anyone to walk, much less clear vegetation. Depending on the model, it can clear trees with trunks up to 14&nbsp;in. in diameter. Plus, an optional ripper attachment extracts the tree&rsquo;s stump for subsequent grinding.</p> <p>Other self-propelled grinders require that trees be cut beforehand, and stumps must be low enough to clear the machine&rsquo;s undercarriage. The Tree Mulcher instead will grind stumps to 6 in. below the surface as it progresses. It leaves a 4- to 5-in. layer of mulch on the ground after clearing a right of way.</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-mulcher-puts-land-clearing-high-gear-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> <h3> One-man operation</h3> <p>Shinn offers several sizes of the Tree Mulcher in two configurations. The EP Series runs off the hydraulic system of a full-size excavator through priority-flow valves. The S Series, on the other hand, has its own hydraulic power unit (HPU) driven by a diesel engine of up to 650 hp. The S Series version fits neatly onto reduced- and zero-tail swing excavators in place of the standard counterweight.</p> <p>When an operator activates the S Series, the HPU&rsquo;s variable-displacement axial-piston pump runs full at stroke with the engine at optimum speed. The cutter head can accelerate to its full operating speed of 1,850 rpm in just 1.28 sec from a dead stop under no load. The operator then maneuvers the front of the cutter&rsquo;s shield against the trunk of the tree about 20 ft above the ground. Subsequently, the excavator is driven forward, which pushes the rotating cutter head into the trunk. The weight of the treetop causes it to fall away, enabling the operator to grind the remaining trunk of the tree down into the ground. Finally, the cutter head is positioned to grind the treetop by drawing it into the grinder.</p> <h3> Hydraulics</h3> <p>The HPUs use a <strong>Bosch-Rexroth</strong> axial-piston pump incorporating torque limiting matched to the particular engine make and model used. Torque limiting allows the Tree Mulcher to exploit the full power band of the engine. Without this feature, compensator pressure would be set to whatever pressure corresponded to the maximum power output of the engine &mdash; say, 3,850 psi for a 250-hp engine. This forces the machine to waste energy because it must operate at maximum flow and pressure.</p> <p>With the torque limiter, pressure can be set to maximum of 5,000 psi. As a result, when the cutter head stalls, the pressure immediately increases to maximum and provides maximum torque to reaccelerate the cutter head. As the motor speed accelerates at the cutter head, flow through the system increases enough to achieve maximum torque output of the engine, and the limiter adjusts the pump to maintain the horsepower limit through the remainder of recovery.</p> <p>The S Series Tree Cutter comes in nine standard sizes powered by engines rated from 125 to 650 hp. These engine-pump packages can produce 98 to 238 gpm of flow at 5,000 psi. The pump, electronically coupled to the engine for maximum output, has a response time of less than 70 msec.</p> <p>Hydraulic power from the HPU drives one or two (depending on model) hydraulic motors that produce 722 to&nbsp;2,166&nbsp;lb‑in. output torque at the cutter&rsquo;s hydraulic motor shaft. This is a measure of the torque applied only by the hydraulic motor itself, and doesn&rsquo;t account for inertia of the rotating group.</p> <p>The hydraulic motor drives the cutter drum through a jackshaft to prevent applying radial load to the motor&rsquo;s shaft bearings. Company officials felt this solution is more heavy duty and reliable than an overhung load adapter. A torsionally soft shaft coupling provides additional motor-bearing protection. The jackshaft transmits power to the cutter drum through a Gates Poly Chain GT-2 synchronous belt drive.</p> <p>Full instrumentation in the control cab monitors inlet suction, charge pressure, charge filter bypass pressure, system pressure, return pressure, hydraulic fluid temperature (with overtemperature warning), return filter bypass, and low-fluid-level warning. A manifold automatically bleeds air from the hydraulic system at every start to help protect the pump and motor from cavitation.</p> <p>Hydraulic options include electronic pump control and an offline (kidney loop) filtration circuit. The electronic package increases longevity by ramping the pump up and down. This is a very important element in the application, because its engine can experience massive overrunning due to the flywheel effect of a 1,200-lb cutter head during shutdowns. The ramp controls take the activation and de-activation&nbsp;of the pump to a consistent level&mdash;an otherwise impossible task for the operator.</p> <h3> Short-run hoses facilitate in-field replacement</h3> <p>Shinn created the Tree Mulcher design with functionality in mind. For example, shorter-length hoses (about 48 to 60-in. long) run down the boom, rather than one continuous hose. Although using one hose is less expensive, the nature of the operation sometimes results in stray limbs or other debris occasionally damaging the hose. The equipment often works in remote areas, and generally, the operator winds up having to replace the damaged hose (imagine dragging a 40-ft replacement hose down a right of way, crossing streams, etc.).</p> <p>The company decided that the added convenience of shorter hose sections more than offsets the greater expense of using shorter runs interspersed with bulkheads. With this setup, the operator can easily remove the damaged section of hose, take it to a hose shop, and get another one made of the same length &mdash; or carry a few spares. The bulkhead has welded stops for the fittings, which prevent them from turning while replacing hoses in the field.</p> <p>Another side benefit of shorter-run hoses is that they reduce movement during operation. Long hoses tend to straighten out when subjected to pressure, increasing the possibility of chafing against the boom and other components. This is particularly important with the Tree Mulcher, in which system pressure varies between 800 and 5,000&nbsp;psi several times per minute.</p> <h3> Problems solved</h3> <p>When initially building this system, Shinn used an older model of axial-piston pumps. The company soon encountered the problem of pump cavitation during sudden stalls of the cutter head, which stemmed from locating overpressure relief valves in the motor &mdash; on the end of the excavator boom. Because pressure equalizes at 800 psi under no load, during a sudden stall, pressure had to reach 5,500 psi before the relief opened to complete the loop. To cure this, accumulators were installed at the front and back to provide make-up oil.</p> <p>Shinn also began ordering the units with larger charge pumps. Pressure control proved to be a challenge: System pressure was set to 3,800 psi, but when plotting system pressure, the company discovered overshoots to 6,500 psi. Pressure spikes usually occur while grinding stumps. As the cutter teeth grab into the stump, large pieces of wood can be drawn up into the head, which will instantly stop the cutter drum and motor. When working at full displacement, the pump can quickly generate a pressure spike.</p> <table align="left" border="1.5" cellpadding="5" cellspacing="5" style="width: 550px;"> <tbody> <tr> <td> <h3> Loader Attachment Makes Tree Loading, Unloading a Breeze</h3> <p><br /> <img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/2014.09-Sidebar-1.jpg" style="width: 250px; height: 208px; margin: 5px; float: left;" title="A rotary actuator gives the Tree Boss’ attachment 270° of roll motion, and a second provides 100° of yaw motion. The grabber arm (actuated by a hydraulic cylinder) and foot assembly bolts directly to drilled and tapped holes in the flange and end of the actuator’s output shaft." />The Tree Boss, an attachment for skid-steer loaders, allows one person to load and unload balled trees. These are the larger trees dug up from nurseries that have their root balls wrapped in burlap to keep them intact and ready for transplant. A single operator can use the Tree Boss, manufactured by <a href="http://www.treeequip.com" target="_blank"><strong>Tree Equipment Design Inc.,</strong></a> New Ringgold, Pa., to do the job of an entire crew of four workers.</p> <h3> Hydraulic muscle</h3> <p>The Tree Boss utilizes three hydraulic cylinders and two helical hydraulic rotary actuators. Two cylinders operate arms that open and close to grab the root ball, and the third cylinder operates a foot that adjusts to the diameter of the root ball, providing a third contact point when grabbing the root ball. The rotary actuators work together for lifting, rotating, and positioning the tree as it&rsquo;s picked up and loaded. The actuators are mounted together with their shafts perpendicular. An actuator with 25,000&nbsp;lb‑in. torque capacity and 270&deg; of rotation is mounted vertically, and one with 42,000&nbsp;lb‑in. capacity and 100&deg; of rotation is mounted horizontally.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/2014.09-Sidebar-2_0.jpg" style="width: 175px; height: 277px; margin: 5px; float: right;" title="A sliding spline rotary actuator converts linear motion of a piston to rotational output. Helical teeth machined into the piston’s outside diameter OD slide inside teeth on the inside diameter (ID) of stationary ring gear. Helical spline teeth machined onto the OD of the output shaft engage matching teeth on the piston’s ID. " />Using two rotary actuators provides maximum articulation capabilities within the most compact configuration possible, while also generating high torque and eliminating the need for mechanical linkages. This permits a more aesthetic design, reduces weight, and holds down assembly costs. Furthermore, because trees generally must be transplanted within a narrow time window, frenzied work shifts often lead to equipment failures.<br /> Rotary actuators hold several advantages over other rotational devices and actuator designs:</p> <ul> <li> High torque output is achieved in compact configurations.</li> <li> The shafts incorporate integral, large-diameter, drilled and tapped mounting flanges, which contribute to mounting ease and flexibility.</li> <li> Integral, extra-large-diameter ball bearings support the shaft and enable the actuators to carry heavy radial, moment, and thrust loads without the need for additional external bearing support.</li> <li> Eliminating all internal bypass and external leakage (and the nearly zero backlash characteristics) produces smooth, positive positioning without drift.</li> <li> No external moving parts are exposed.</li> <li> The helical gear design offers exceptional resistance to shock loading and abuse.</li> </ul> <p>The skid-steer loader operator controls eight functions: left rotation, right rotation, tip up, tip down, grabber arms open, grabber arms close, foot in (to adjust to diameter of root ball), and foot out. An electronically controlled hydraulic valve mounted inside the boom controls all functions. The operator has access to these functions via switches integral to a handgrip that replaces the original loader&rsquo;s joystick.</p> </td> </tr> </tbody> </table> <p>&nbsp;</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/forestry-lumber/hydraulic-mulcher-puts-land-clearing-high-gear-0#comments Forestry & Lumber Mon, 08 Sep 2014 19:05:00 +0000 28661 at http://hydraulicspneumatics.com Fluid Power Assists Rehabilitation Efforts http://hydraulicspneumatics.com/other-industries/fluid-power-assists-rehabilitation-efforts <div class="field-deck"> Here’s a look at some innovative medical devices that help get patients back on their feet. </div> <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Medical-Lead.gif" style="width: 585px; height: 465px; margin: 5px; float: left;" />Our soldiers have, unfortunately, suffered a substantial number of lower-limb battle injuries in recent years. That has spurred research efforts into innovative treatment strategies, such as powered orthotic systems. The goal is to develop devices that improve rehabilitation methods and results, and ultimately enhance the mobility in those suffering from combat-related, as well as civilian, injuries.</p> <p>Thanks to fluid power&rsquo;s high power density &mdash; the ability to generate large forces from relatively small and light components &mdash; some research projects are taking advantage of hydraulics and pneumatics as mobile power sources. Here&rsquo;s a look at some novel devices currently under development.</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/fluid-power-assists-rehabilitation-efforts-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> <h3> Powered ankle</h3> <p>An orthotic device that can apply assistive torque at the ankle joint could significantly improve patient rehabilitation. These devices lift the toes to ensure ground clearance when the leg swings. Users could use a portable powered ankle-foot orthosis (PPAFO) to assist walking, as a gait-training tool in physical therapy, and to provide power-assisted methods for improving strength and range of motion. Current ankle-foot orthoses (AFOs) use mechanical elements to aid the wearer or electrical stimulation to actively assist walking, but these have limited effectiveness.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Ankle-foot-irthosis.gif" style="width: 300px; height: 450px; margin: 5px; float: right;" title="Researchers have developed a pneumatically powered ankle-foot orthosis. A bottle of compressed CO2 worn on a belt drives the portable device." />Powered systems have been developed to address the inherent limitations of passive AFOs. They provide power to the ankle joint for motion control and propulsion assistance, but the size and power requirements of current designs restrict them to tethered power supplies that cannot be used outside the laboratory.</p> <p>Researchers from the <strong>University of Illinois,</strong> <strong>Georgia Tech, University of Virginia,</strong> and <strong>University of Minnesota,</strong> working with a grant from the <strong>Center for Compact and Efficient Fluid Power,</strong> have developed a pneumatically powered PPAFO to provide untethered assistance for daily in-home rehabilitation treatment. According to the researchers, the key advantages of fluid power for this application are the actuators&rsquo; high force output in relation to its size and weight; the ability to actuate a joint without a transmission; and the freedom to route pressurized fluid to the actuator through flexible hoses, which lets the actuator be placed in locations not possible with an electric motor. The high force-to-weight ratio and the flexibility to mount components elsewhere on the body let researchers reduce the weight of the device at the shank and foot.</p> <p>The PPAFO was designed to assist impaired gait by controlling forefoot velocity when the heel hits the floor to prevent foot slap; allowing free range of motion while standing; provide assistive torque for propulsion; and support the foot and prevent it from dropping when the leg swings. It uses a 9-oz bottle of compressed liquid CO<sub>2</sub> and a pressure regulator from <strong>Supplierpipeline Inc.,</strong> Waterloo, Ont., to power an SMC, Noblesville, Ind., dual-vane, bidirectional rotary actuator at the ankle joint. The CO<sub>2</sub> bottle and regulator are worn on a belt attached to the waist, separate from the structural elements of the PPAFO. This distributes the weight and minimizes loads on the lower limbs. A second pressure regulator from <strong>Festo Corp.,</strong> Hauppauge, N.Y.. modulates torque to support the foot during leg swing.<br /> The direction of torque switches from dorsiflexor (toes up) to plantar flexor (toes down) with two Festo solenoid valves. Control of valve switching is based on inputs from force sensors on the foot. The pressure regulators adjust the magnitude and timing of PPAFO torque output to provide the appropriate assistance while walking. Tests used 90-psig pressure to power the actuator, and longevity of the system was rated by running until final pressure reached 20 psig.</p> <p>Results showed the device significantly aided dorsiflexor movements and, to a lesser degree, plantar flexor movements as the test subject walked. The loaded position-response speed (600&deg;/sec) was fast enough to initiate different PPAFO motions as needed. Test participants reported that the PPAFO provided noticeable assistance that improved gait quality. The novel, portable pneumatically powered AFO lays the groundwork for future studies.</p> <h3> Stance control</h3> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Gait-assist-system.gif" style="width: 300px; height: 470px; margin: 5px; float: right;" title="A gait-assist system combines electrical stimulation to paralyzed lower extremity muscles with a controllable hydraulic exoskeleton. The goal is to restore independent mobility to individuals with spinal-cord injuries. " />Considerable R&amp;D has gone into developing a lower-limb brace with a controllable mechanism that fully supports the knee when standing, while allowing unhindered knee movement when the leg swings as a user walks or steps. Stance-control knee mechanisms (SCKMs) have used a variety of mechanisms. However, many are difficult to unlock under load, which is necessary during the transition from the stance to the swing phase of walking. Users with weak knee muscles may have difficulty extending the knee to unlock the mechanism.</p> <p>According to a report in the <em>Journal of Rehabilitation Research &amp; Development</em>, researchers at the Louis Stokes Cleveland Department of Veterans Affairs Medical Center and <strong>Case Western Reserve University</strong> (both located in Cleveland) have developed a hydraulic SCKM to fully support the knee during stance, yet allow uninhibited leg-swing motion for individuals with paraplegia using muscle stimulation to assist walking.</p> <p>One design objective of the hydraulic SCKM was to fully support the knee when the leg extends during stance. This lets the SCKM replace muscle activity for static load support and, thus, reduce electrical stimulation to the knee muscles. The muscles rest between contractions, and this should delay fatigue and extend walking distances. The device also had to transition between the support and free-movement phases and lock and unlock responsively and consistently according to the walker&rsquo;s dynamic requirements. Thus, the unit maximized locking torque at full knee extension while unlocking and minimizing the torque needed to drive the knee during the swing phase of gait.</p> <p>The SCKM consists of a miniature hydraulic system attached across the knee joint in a knee-ankle-foot orthosis (KAFO). Revolute joints in a four-bar linkage arrangement convert linear motion to rotary. A two-way, two-position, normally closed solenoid valve controls a double-acting hydraulic cylinder. It locks the mechanism against knee flexion, but actuating the cylinder permits knee extension. A single-acting, spring-loaded cylinder serves as an expansion chamber to take up fluid from the drive cylinder during knee movements.</p> <p>The device used a <strong>Clippard,</strong> Cincinnati, <sup>9</sup>/<sub>16</sub>-in. bore, 3-in.-stroke double-acting cylinder rated to 2,000 psi; a Clippard &frac34;-in.-bore, 1-in.-stroke single-acting cylinder for the accumulator; and an <strong>Allenair,</strong> Mineola, N.Y., two-position, two-port solenoid valve with <sup>1</sup>/<sub>8</sub>-in. ports and a flow coefficient of 0.166 to 0.176. Hydraulic components were selected based on small cylinder bore and stroke to minimize flow volume and overall weight, high operating pressure to minimize component size, high valve flow coefficient to minimize pressure losses, and minimal power consumption of the solenoid valve to prolong use.</p> <p>A 12-Vdc supply powers the SCKMs. Feedback control opens the solenoid valve during knee extension. A closed-loop controller unlocks the SCKM during the swing phase of gait and locks the mechanism in extension during stance. Feedback signals include valve state, forefoot and heel ground contact, knee angle and velocity, and a synchronization signal from the baseline muscle stimulation pattern.</p> <p>Results show that hydraulics can be used in a controllable mechanism for restoring gait after paralysis from spinal cord injuries. Evaluation of the SCKM in a hybrid neuroprosthesis by an individual with paraplegia demonstrated that the SCKM could fully support the user during the stance phase of gait without the need for electrical stimulation of knee muscles.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Exoskeleton.gif" style="width: 250px; height: 475px; margin: 5px; float: left;" title="The exoskeleton consists of computer-controlled hydraulic knee and hip circuits. (Photos are courtesy of the Louis Stokes Cleveland VA Medical Center and Case Western Reserve University.)" />Weight was not a principal consideration, but the hydraulics comprise about one-fourth of the total mass of the SCKM and KAFO. Structural components, on the other hand, weigh nearly three time as much. However, many structural components were overengineered using steel alloys to ensure structural integrity and safety. Weight was not a principal consideration. Additional R&amp;D is needed to optimize the SCKM&rsquo;s construction and mass distribution.</p> <h3> Advanced exoskeletons</h3> <p>Paralysis, muscle weakness, and lack of coordination are common consequences of combat-related injuries to the central nervous or musculoskeletal systems, according to researchers at the <strong>Advanced Platform Technology (APT) Center</strong> in Cleveland, a <strong>Department of Veterans Affairs Center of Excellence for Rehabilitation Research and Development</strong>. To address these issues, APT researchers are designing and testing bracing systems that lock and unlock in coordination with voluntary or stimulated muscle contractions.</p> <p>The goal is to restore or assist independent walking and upright mobility. A first generation gait-assist system combines electrical stimulation to the paralyzed lower extremity muscles with a controllable hydraulic exoskeleton. It&rsquo;s intended to help individuals with spinal-cord injuries stand, walk, and climb stairs.</p> <p>The system consists of computer-controlled hydraulic knee and hip mechanisms that let the lower extremity joints move during walking, yet be fixed during weight bearing so the muscles can rest. The goal is to improve the stability and posture of individuals with paraplegia as compared to walking with electrical stimulation alone, and also reduce user effort and increase walking speed when compared to standard reciprocal braces.</p> <p>The project&rsquo;s next step is to make the exoskeleton self-contained and suitable for independent use and clinical testing outside the laboratory. Researchers are working to reduce overall size and weight, as well as refine the controls to coordinate hip and knee motion and damping under load. The goal is to improve&nbsp;foot-floor and step clearance during walking and stair climbing, and provide smoother and more natural gait and stair descent. If successful, the design may give users better mobility, particularly on uneven terrain.</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/other-industries/fluid-power-assists-rehabilitation-efforts#comments Other Technologies Other Industries Mon, 08 Sep 2014 18:13:00 +0000 28641 at http://hydraulicspneumatics.com Hydraulic-Electric Analogies — Part 6: Coils, Cores, and Transformers http://hydraulicspneumatics.com/other-components/hydraulic-electric-analogies-part-6-coils-cores-and-transformers <div class="field-deck"> Inductance, in all of its various forms, plays a major role in indispensable electronics components such as coils and transformers. </div> <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Fig-8-Air-Core-Inductor_0.gif" style="width: 300px; height: 355px; margin: 5px; float: right;" title="Figure 8. These schematic symbols represent an air-core inductor (A) and an iron-core inductor (B)." />Lenz&rsquo;s Law explains more than just the &ldquo;speed voltage,&rdquo; which also happens to be another moniker for that law. It says an induced voltage will occur anytime there&rsquo;s relative motion between the conductor and the magnetic field. Therefore, the conductor can move relative to the field, or the conductor could be stationary while the magnets move, or they could both be in motion. All will result in an induced voltage in the conductor. They just require relative motion between the conductor and the field and a transverse component to the relative motions. That is, if the conductor followed along a flux line, there would be no induced voltage. A complete closed electrical path also produces an induced current in the conductor.</p> <p>The scenario of interest here is when both magnets and conductors are stationary, yet the current is changing to prompt a change in the magnetic field. Again, a voltage will be induced; change only occurs to the current and magnetic field.</p> <p>When the flow path is a coil, the flux lines from one loop combine with flux lines in adjacent loops to increase magnetic field strength. When there&rsquo;s only one set of loops (i.e., only one coil), the circuit element is called an inductor. The core may or may not be iron; Figure 8 shows the schematic symbols for air and iron-core inductors.</p> <div class="related-content"> <div class="related-label"> <b>Related:</b></div> <p><a href="http://hydraulicspneumatics.com/controls-instrumentation/electric-hydraulic-analogies-part-3">Electric-Hydraulic Analogies - Part 3, The Open and Closed Contradiction</a></p> <p><a href="http://hydraulicspneumatics.com/other-technologies/electric-hydraulic-analogies-part-4-comparing-power-sources-between-electric-and-">Electric-Hydraulic Analogies - Part 4: Comparing Power Sources Between Electric and Hydraulic Systems</a></p> <p><a href="http://hydraulicspneumatics.com/other-technologies/hydraulic-electric-analogies-part-5-current-and-electrical-fields">Hydraulic-Electric Analogies - Part 5: Current and Electrical Fields</a></p> </div> <p>The electrical property of a coil, called its &ldquo;inductance,&rdquo; is measured in henries (abbreviated as &ldquo;H,&rdquo; or sometimes &ldquo;h&rdquo;). The working units of inductance are volt-seconds/ampere, which adds an element of time. The algebraic and schematic diagram identifier for an inductor is an unlikely L. An iron core in the coil results in tens or even hundreds of times greater inductance than an air core for the same number of coil turns and current.</p> <p>Lenz&rsquo;s law also says that the induced voltage&rsquo;s polarity will oppose the change in current that caused it. Thus, the induced voltage will &ldquo;delay&rdquo; the current build up, like when a switch is closed in a battery-inductor circuit. A circuit that shows a battery being used to energize (electrically excite) an inductor, <em>L</em>, at the moment the switch is closed (<em>t</em> = 0), coil current is zero but rising (Figure 9).</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Fig-9-Inductor-Circuit_1.gif" style="width: 300px; height: 160px; margin: 5px; float: right;" title="Figure 9. When a battery is used to energize an inductor (L), a delay occurs in the current buildup. Parasitic resistance (not shown) of the coil determines the limiting value of current." />Inductance relates to current and voltage as force and velocity relates to a physical mass. If a force is applied to a mass, velocity of the mass gradually increases because it&rsquo;s impossible to have infinite acceleration. Inductance is a form of electrical mass or inertia. It would take infinite voltage for the current to change instantaneously. And it would take infinite force to get a finite mass&rsquo;s velocity to change instantaneously.</p> <p>Electrical energization tries to increase the current. However, the induced voltage caused by the changing current has the polarity shown in Figure 9 (+ on top and &ndash; on the bottom) and &ldquo;shoves back&rdquo; against the battery voltage. Therefore, the current at the first instant is 0.</p> <p>Still, the changing current eventually results in a current buildup, which can be seen in the graph on the right (Figure 9, again). This &ldquo;exponential rise in current&rdquo; is caused by the inductor&rsquo;s time-effective properties. Eventually, the current will reach a plateau (the time can be on the order of nanoseconds for very small inductance, or on the order of seconds with a very large inductor). Both the battery voltage and the parasitic resistance of the coil determine the current plateau (not shown in the figure).</p> <p>The time required for the current to reach its plateau, also called the &ldquo;steady-state&rdquo; value, is given approximately by 5 <em>L</em>/<em>R</em>, where <em>L</em> = inductance in henries, and <em>R</em> = parasitic coil resistance in ohms. The <em>L</em>/<em>R</em> ratio is the coil&rsquo;s &ldquo;time constant&rdquo;; its units are simply seconds. The general rule is that it takes five time constants to reach steady state.</p> <p>One important factor to remember: Inductance puts time-dependence into electrical events. As stated earlier, a &ldquo;delay&rdquo; occurs in the buildup of current. In other words, rather than jump up immediately to the steady-state value, it takes time. We say that &ldquo;inductors oppose changes in current,&rdquo; i.e., the current cannot change instantaneously. Voltage can, but current cannot.</p> <h3> Transformers</h3> <p>Now that we know a single coil can induce a voltage in itself, what if two coils are near one another? Will one induce a voltage in the other? The answer is, most emphatically, yes! In fact, fluxes of two electrical coils that link to one another is an exact representation of a transformer.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Fig-10-3D-Transformer_0.gif" style="width: 300px; height: 172px; margin: 5px; float: right;" title="Figure 10. Most transformers used in electrohydraulic applications have two or more “primary” or “secondary” windings wound around a common iron core. " />A real transformer is hardly more complicated than the simple, two-winding transformer shown in Figure 10. The &ldquo;primary&rdquo; winding has power applied to it, while electrical power taken from the &ldquo;secondary&rdquo; winding supplies some load. As long as the power ratings aren&rsquo;t exceeded, most primaries and secondaries can be switched without undue consequences. The device is more or less bidirectional in terms of energy flow direction.</p> <p>How does a transformer work? Foremost, transformers will ONLY work with alternating voltage &mdash; not direct current. Also, the flux must be changing; applying ac to the primary winding ensures flux change. A laminated iron core enhances flux buildup and magnetic intensity. Because the iron core is common to both windings, the primary&rsquo;s flux links with the secondary winding. The ac power ensures that the flux varies with time. As a consequence, a voltage is induced into the secondary winding with no electrical connection other than the mystical magnetic flux.</p> <p>The physics of Lenz&rsquo;s Law demonstrate that the secondary (output) voltage&rsquo;s amplitude is the relative number of turns of the primary winding to the secondary winding. For the ideal transformer, the output power is equal to the input power:</p> <p class="rtecenter"><em>V</em><sub>1</sub> &times; <em>I</em><sub>1</sub> = <em>V</em><sub>2</sub> &times; <em>I</em><sub>2</sub>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1)</p> <p>Manipulating the equation slightly and introducing the turns, voltage, and current ratios results in:</p> <p class="rtecenter"><em>V</em><sub>2</sub> &divide; <em>V</em><sub>1</sub> = <em>I</em><sub>1</sub> &divide; <em>I</em><sub>2</sub> = <em>N</em><sub>2</sub> &divide; <em>N</em><sub>1</sub>&nbsp;&nbsp;&nbsp; (2)</p> <p>This last equation expresses that if more windings are in the secondary coil (<em>N</em><sub>2</sub>), the secondary voltage (<em>V</em><sub>2</sub>) will be greater than the primary excitation voltage (<em>V</em><sub>1</sub>). This is called a &ldquo;step-up&rdquo; transformer because it raises the voltage. Obviously, fewer turns on the secondary will result in a &ldquo;step-down&rdquo; transformer.</p> <p>Equation 2 also reveals that a boost in voltage must result in reduced current. Suppose the load on the secondary increases, meaning the load needs more current. The primary current must likewise increase, because the primary&rsquo;s volt-ampere product (input power) must be equal to the secondary&rsquo;s volt-ampere product (output power), internal losses notwithstanding. This is, at once, a description of the transformer (Equation 2) as well as a statement of energy conservation (Equation 1).</p> <h3> Core lamination</h3> <p>One may question &ldquo;Why is the core laminated?&rdquo; Lenz once again provides the answer. As already stated, the core must consist of materials, mostly ferromagnetic, with flux-enhancing properties. But those materials are also electrical conductors that may have induced voltages and currents. The same is true of the core: Alternating flux in the core material induces internally circulating currents, called &ldquo;eddy currents,&rdquo; that generate heat in the resistance of the core material.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Fig-11-Solid-Laminated-Cores_0.gif" style="width: 300px; height: 191px; margin: 5px; float: right;" title="Figure 11. Laminated cores force the induced eddy currents to take longer, narrower paths, creating less self-heating in the core." />As shown in Figure 11, when the cores are laminated with the desired ferromagnetic material and the laminations are separated electrically from one another by a thin coating of electrically insulating varnish, it reduces the net magnitudes of the induced currents. This keeps the core cooler and improves the transformer&rsquo;s efficiency.</p> <p>Currents are induced in a transverse direction from the inducing flux lines. Meanwhile, the laminations, when arranged as suggested in Figure 10, don&rsquo;t significantly impede the flux, but will impede the currents. Therefore, current in the laminations is forced to take long narrow paths. All magnetic devices operating on alternating current feature laminated cores.<br /> Laminations are always aligned with the flux lines to the extent where losses can reach their lowest levels. For example, dc solenoids inadvertently operating on ac can quickly burn up due to excessive eddy currents in the unlaminated core.</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/other-components/hydraulic-electric-analogies-part-6-coils-cores-and-transformers#comments Other Components Mon, 08 Sep 2014 16:45:00 +0000 28631 at http://hydraulicspneumatics.com No Break for Rod Bearings in Hostile Conditions http://hydraulicspneumatics.com/cylinders-actuators/no-break-rod-bearings-hostile-conditions <div class="node-body article-body"><p>The process of coupling rail cars together to assemble a train is called &ldquo;humping.&rdquo; In this process, an individual car is pushed over a small hill, or hump. As the car descends the other side of the hill, it coasts until it contacts another car and automatically couples to it. The multicar assembly is then pulled forward about one car length, and the process is repeated until an entire train is assembled. This all occurs in a marshaling yard, and the largest marshaling yards move thousands of rail cars every day.</p> <p>An important parameter in car humping is speed. The car must be going fast enough to actuate the coupler, but excessive speed creates unnecessary <img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/2014.09-4th-story.jpg" style="width: 450px; height: 331px; margin: 5px; float: right;" title="Pneumatic cylinders act in concert to squeeze rails onto freight car wheels in braking operations. The cylinders use Orkot Slydring rod and linkage bearings to tolerate constant exposure to weather extremes and contamination." />shock that can damage components and freight. To control speed of the rail car, a jaw-type rail brake slows down cars, when necessary, before they contact the train segment already assembled. To accomplish this, a series of 10 to 12 brake actuators &mdash; each powered by a pneumatic cylinder &mdash; pushes on a moveable rail that presses against the inner surface of the car&rsquo;s wheel flange to slow down the car.</p> <p>The brakes are used for reducing and&nbsp; the speed of of rail cars.&nbsp; This is no easy task, considering the mass of the car &mdash; each wheel set can carry a load of 25 tons or more. Moreover, the relatively small surface area of wheel flanges requires high braking forces to be generated.</p> <p>Furthermore, as with most railroad equipment, components of the rail brakes are constantly exposed to the weather and must perform repeatedly in the frigid cold, blistering heat, during heavy downpours, and while subjected to sand, dirt, ice, and other contaminants.</p> <h3> Composite wins out over bronze</h3> <p>After extensive product research and successful test results at a railway marshaling yard in Germany, rod bearings made of Orkot were installed in the track-mounted, jaw-type rail brakes. Orkot is a resin-impregnated and lubricated fine-weave fabric material from <a href="http://www.tss.trelleborg.com" target="_blank"><strong>Trelleborg Sealing Solutions</strong></a>. The material is capable of withstanding high side loads, damping vibrations, and embedded foreign particles. Orkot Slydring prevents metal-to-metal contact between piston rod and gland bore and absorbs high transverse loads.</p> <p>Conventional rail brake assemblies typically use bronze as the primary material for piston rod and linkage bearings. However, bronze must be regreased periodically to prevent wear between the rod or shaft and the bearing. Scheduled maintenance such as this robs productivity both in manpower required and downtime to perform the task. Furthermore, increasingly strict environmental laws may prohibit using grease in this type of application because lubricants eventually could work their way into groundwater.</p> <p>These potential environmental problems prompted officials to find an alternative to the maintenance-intensive bronze bearings. They selected Orkot Slydring as a candidate for piston rod and linkage bearings for field testing because of its maintenance-free performance and positive environmental characteristics resulting from its self-lubricating feature.</p> <p>During a four-year progressive testing period in the marshaling yard, Orkot Slydring bearings were installed in the rail brakes. They were pressed into each cylinder&rsquo;s rod-end cap, and a small amount of lubricant was supplied initially. The lifetime self-lubrication significantly reduced scheduled downtime and labor costs over bronze bearings and exceeded expectations.</p> <p>After successfully completing field tests, the bearings became standard equipment on all jaw-type rail brakes and retarders. As a result, arrival speed of the rail cars has been reduced from 8.5 m/sec (19 mph) to 4.5 m/sec (10 mph), a significant improvement that substantially reduces wear and tear on the rail equipment.</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/cylinders-actuators/no-break-rod-bearings-hostile-conditions#comments Cylinders & Actuators Mon, 08 Sep 2014 13:50:00 +0000 28611 at http://hydraulicspneumatics.com Movers and Shakers Ride the Rails http://hydraulicspneumatics.com/construction/movers-and-shakers-ride-rails <div class="node-body article-body"><p>If you&rsquo;ve ever dumped a load of soil from a wheelbarrow, you know there are two ways of getting every particle of dirt out. One is to dump the cart almost completely upside-down so that even dirt stuck to the bottom of the bucket falls out. The other is to pivot the cart skyward and shake it a few times. This agitation loosens clumps of soil that stick to each other and to the bucket.</p> <p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/2014.09-3rd-story.jpg" style="width: 400px; height: 259px; margin: 5px; float: right;" title="This bulk cargo rail car uses a completely self-contained hydraulic system to dump material to either side of the tracks. The system is driven by a dc motor from a battery, which is charged by a generator from wheel motion whenever the car is moving." />Having to dump sand, gravel, soil, and other bulk materials from a railroad car can also prove challenging. The trouble is, railroad cars hold so much material that what&rsquo;s left at the bottom of a load gets pressed onto the bottom and side surfaces of the cargo bed. This complicates unloading because it&rsquo;s not easy to shake a massive rail car to loosen material adhering to inner surfaces.</p> <h3> Capturing its own energy</h3> <p>An energy-efficient solution to unload bulk materials is the Model 128 rail car developed in Germany. Divided into two 18-m<sup>3</sup> bulk-cargo sections, it uses a pair of hydraulic cylinders to raise each section for dumping. Two-way action allows dumping material to be unloaded on either side of the. Each cargo bed is also fitted with eight locking cylinders. Four locking cylinders secure the side hinge opposite the direction in which material will be dumped.</p> <p>Probably the most unusual aspect of the rail car is its electrical power source &mdash; a 26-V, 110-A-hr battery charged by an axle-mounted generator. The generator charges the battery whenever the car is rolling. This makes the entire car self-contained, so it can be unloaded in remote areas with no need for an auxiliary source of power.</p> <p>Hydraulic power is provided by an electric-motor-driven gear pump. From the pump, fluid is routed through two six-section groups of open and closed-center valves &mdash; an identical group for each cargo bed. All valves are operated electrically by a PLC, which also gets its power from the battery.</p> <p>The PLC simplifies operation by storing the sequence of events that make up the dumping sequence. First, the PLC actuates valves to retract the hinge-locking cylinders on the side to be raised. The cylinders are spring-applied and hydraulically released to ensure that the cargo bed only can be raised during the dumping sequence. Next, fluid is routed to the appropriate double-acting cylinders to raise the cargo bed. A proximity switch in each cylinder signals the PLC once the cylinders reach their full extension. The PLC then instantly signals valves to rapidly and repeatedly reverse flow to shake the upraised cargo bed. Then, the valves shift to return the lift cylinders to their fully retracted position. Once the cargo bed has been fully retracted, pressure to the locking cylinders is relieved to again secure the cargo bed in place.</p> <p>The entire sequence takes only 2 min, and control is simple: the operator selects which cargo bed will be dumped and in which direction. Pushbuttons provide a means to initiate the sequence, abort the sequence (and return to retracted position), and stop. Operation is much faster, simpler, and more effective than actuating valves manually. Furthermore, time is also saved by not having to locate, connect, and disconnect an external power source.</p> <h3> Successful implementation</h3> <p>The time window to develop a prototype was very limited. As it turned out, two prototypes of the rail car were completed, and testing began only 10 months after the project was initiated. The rail cars went into production following successful testing of the prototypes. Hundreds of the cars have since been produced, and they have been used extensively to transport building materials and waste throughout Germany.</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/construction/movers-and-shakers-ride-rails#comments Construction Mon, 08 Sep 2014 13:38:00 +0000 28601 at http://hydraulicspneumatics.com Lever Changes Joystick Pattern in Off-Highway Machines http://hydraulicspneumatics.com/construction/lever-changes-joystick-pattern-highway-machines <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Lever-Changes.gif" style="width: 300px; height: 319px; margin: 5px; float: right;" title="Heavy-equipment operators are most productive with equipment they’re familiar with. Holmbury’s pattern-changer valve adds value to machinery by letting operators select between the two most popular configurations of control." />When two of the big guys in the hydraulic excavator business &mdash; say, Caterpillar and John Deere &mdash; each design a different operating pattern for the two joysticks that control the pilot circuits on their machines, it&rsquo;s highly likely that both patterns will appear in the field. That&rsquo;s exactly what has happened. Although SAE selected the Caterpillar pattern as its voluntary standard, John Deere and some other equipment manufacturers produced many machines with the John Deere pattern. Both patterns also appear on other types of equipment. (Designs on new excavators, however, seem to be trending toward the SAE arrangement.)</p> <p>For contractors that own only one excavator, the pattern is not critical. But for larger contractors or rental operations with a fleet of multiple-brand excavators, matching the joystick pattern to a particular operator&rsquo;s skills can be a real headache.</p> <p>A mechanic can disconnect and reconnect a couple of hoses at the main valve bank to replumb the system for either joystick pattern &mdash; but this takes time, probably spills some oil, and gives contamination an opportunity to enter the system. A simpler, cleaner approach is to install Holmbury&rsquo;s joystick-pattern changer valve between the joysticks and the valve bank. This two-position/eight-way, lever-actuated valve incorporates four inlet and four outlet ports to accommodate both flow patterns within its 2 &times; 2 &times; 2.34-in. steel body. It changes from one to the other and back again with an easy 90&deg; flip of a lever. Rated at 3,000&nbsp;psi, the valve is rated for pilot flows and its strictly manual design has no electrical parts to fail. (A tamper-proof version with no handle also is available.)</p> <p>For companies that provide excavators to many different operators, the joystick-pattern changer can save hundreds of labor hours.</p> <p>Holmbury products are available in North America from <a href="http://www.holmbury.com" target="_blank">Holmbury Inc.</a>, Eastlake, Ohio, (800) 860-5597.</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/construction/lever-changes-joystick-pattern-highway-machines#comments Construction Mon, 08 Sep 2014 13:32:00 +0000 28591 at http://hydraulicspneumatics.com Mobile Concrete Pump Breaks 100-m Height Barrier http://hydraulicspneumatics.com/construction/mobile-concrete-pump-breaks-100-m-height-barrier <div class="field-deck"> One of the world’s largest concrete pumps soars to heights exceeding 100 m and is controlled, of course, by hydraulics. </div> <div class="node-body article-body"><p>Nowhere in the world are cities currently growing faster than in China. In fact, skyscrapers seem to be springing up like mushrooms in Shanghai and Beijing. To keep up with this growth, construction companies must come up with new building equipment to match ever-increasing challenges. One such machine is the portable concrete pump from Chinese construction machinery manufacturer Zoomlion, Changsha City, Hunan. It reaches up to a height of 101.18 m, which even attracted interest from Guinness World Records. Apart from its sheer size, the Zoomlion pump also boasts some impressive hydraulics.</p> <h3> Flexible but strong</h3> <p>The design of a machine like the concrete pump always has to satisfy conflicting expectations. The hydraulic system must transmit enough power to move the machine&rsquo;s concrete nozzle quickly and safely to its destination. On the other hand, the hydraulics must achieve precise positioning<img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Lead-photo.gif" style="width: 300px; height: 385px; margin: 5px; float: left;" title="Zoomlion offers a concrete pump that has a vertical reach or more than 100 m. The high power and precise control is achieved using a pair of Bosch Rexroth A4VG axial-piston pumps." />. Naturally, that has an impact on the selection of components. &ldquo;The limited load bearig capacity requires all the main components to be highly efficient with as low dead weight as possible,&rdquo; offered Binxing Wu, chief engineer at Zoomlion. He and his team chose Bosch Rexroth&rsquo;s latest axial-piston pump, model A4VG, for their record-breaking concrete pump.</p> <p>A few PowerPoint slides were enough to convince the Zoomlion engineers that they had found their new feed pump. All the items in specification were checked off: high operating pressure, large displacement, and integrated functions tailored to the required application. The Zoomlion uses a pair of tandem-mounted pumps, each sized at 180 cc/rev.<br /> For safety and equipment longevity, no critical vibrations can be permitted to arise in the placement boom, despite its enormous length. However, the A4VG bidirectional piston pump moves over center so rapidly and gently that no such vibrations can occur. The pump can move from full displacement in one direction to full displacement in the other in no more than 200&nbsp;msec. Furthermore, its integrated pressure relief system prevents pressure peaks from developing in the system.</p> <h3> Challenges in integration</h3> <p>On paper, everything was as it should be. Now the ball was in the project engineers&rsquo; court, as they had to integrate the A4VG pump into the system as a whole. The greatest challenge was dealing with different standards from the different countries. The engineers had to make several adjustments to joints and connections for the pump to run smoothly in Chinese machines. &ldquo;In cases like this, of course, our regional company in the country concerned makes our work a lot easier,&rdquo; explained Christian Frick, project engineer at Bosch Rexroth, Lohr, Germany. &ldquo;Working together with our Chinese colleagues and in a number of personal meetings with the customer, we were able to meet all of Zoomlion&rsquo;s needs very rapidly.&rdquo;</p> <p>The project partners took the hurdles in delivery periods and logistics just as smoothly, although time was especially scarce in the project. Work started in the spring of 2012, and the machine needed to be completed by October. Here, too, communication was everything. Sales and logistics in the two companies cooperated so efficiently that in the end the best possible process was adopted and the concrete pump arrived promptly for the presentation.</p> <p>&ldquo;The use of the A4VG pump in the concrete pump has a positive effect on the Chinese market. It puts the products from Zoomlion on a new level,&rdquo; said Zhicai Zhang, Bosch Rexroth&rsquo;s Trade Sector Manager for concrete machines in China. &ldquo;On the basis of the demand and market feedback, this concrete pump has excellent potential for the future, even beyond its 100-m height,&rdquo; added Binxing. Both men are convinced that even more world records will soon be broken in China with the aid of modern hydraulic technology.</p> <p>FOR MORE information, go to <a href="http://www.boschrexroth.com" target="_blank"><em>www.boschrexroth.com</em></a>&nbsp; or <a href="http://en.zoomlion.com" target="_blank">en.zoomlion.com</a></p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/construction/mobile-concrete-pump-breaks-100-m-height-barrier#comments Construction Fri, 05 Sep 2014 20:17:00 +0000 28581 at http://hydraulicspneumatics.com Linde Shuffles Exec Lineup http://hydraulicspneumatics.com/news/linde-shuffles-exec-lineup <div class="node-body article-body"><p>Linde Hydraulics has rearranged its executive management team, with&nbsp; current CFO Dr. J&ouml;rg Ulrich taking on the additional role of CEO. This move allows Linde to put a stronger focus on decision-making competencies and more effective implementation of strategic and operational measures. Dr. Steffen Appel, COO, who currently leads production and purchasing, will also take responsibility for research and development. Linde&rsquo;s newest addition is Janfried A. Tirre as CSO, and he will lead global sales activities. n</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/news/linde-shuffles-exec-lineup#comments News Fri, 05 Sep 2014 20:08:00 +0000 28571 at http://hydraulicspneumatics.com Parker Updates HoseFinder App http://hydraulicspneumatics.com/news/parker-updates-hosefinder-app <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/ParkerAppWEB-.jpg" style="width: 150px; height: 283px; margin: 5px; float: right;" />The HoseFinder 3.5 mobile app allows users to select and locate critical hoses. The updated HoseFinder 3.5&rsquo;s catalog adds to the original version&rsquo;s 5,000 products, including more than 350 new products from Parker&rsquo;s Industrial Hose Products Div. and Parflex Div.</p> <p>HoseFinder&rsquo;s custom distributor search function directs users to the closest of Parker&rsquo;s more than 13,000 worldwide distribution locations. The search feature STAMP (Size, Temperature, Application, Media, Pressure) allows users to find products by general categories, such as hoses, fittings, and accessories.</p> <p>The app is available for iPhone and Android devices. Optimized for iOS 7, it includes improved graphics and faster searches throughout the app.</p> <p>To get the HoseFinder 3.5 app, visit <em>www.hosefinder.com</em></p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/news/parker-updates-hosefinder-app#comments News Fri, 05 Sep 2014 20:02:00 +0000 28561 at http://hydraulicspneumatics.com Guest Editorial: The Future of Fluid Power in North America http://hydraulicspneumatics.com/technologies/guest-editorial-future-fluid-power-north-america <div class="field-byline"> Michael J. Gust, Industry Liaison Center for Compact &amp; Efficient Fluid Power </div> <div class="node-body article-body"><p><img alt="" src="/site-files/hydraulicspneumatics.com/files/uploads/2014/09/Gust_Mike_Web.gif" style="width: 150px; height: 175px; margin: 5px; float: right;" />Manufacturers, researchers, and media from around the nation will convene at the Vanderbilt University campus in Nashville, Tenn., on October 13 to 16 for the Fluid Power Innovation and Research Conference 2014 (FPIRC14), an extended series of educational events hosted by the Center for Compact and Efficient Fluid Power. &ldquo;This event will be the premier fluid-power research conference in North America this year,&rdquo; says CCEFP Director and Professor Kim A. Stelson. &ldquo;It&rsquo;s a wonderful opportunity for industry to meet and network with fluid-power researchers from across the nation.&rdquo;</p> <p>FPIRC14 will feature collaborative technical breakout sessions, networking opportunities, tours of local research laboratories, and student poster shows. New this year is a distinguished panel discussion on the technologies and workforce skills transforming the fluid-power industry and opportunities for private-public partnerships. &ldquo;The most consistent message I hear from the fluid-power industry is the urgent need for both workforce development and technology advancement,&rdquo; says Eric Lanke, CEO for the National Fluid Power Association. &ldquo;That&rsquo;s why we are increasing our collaboration with the CCEFP going forward. Finding new ways for industry and academia to jointly pursue additional government funding for fluid-power research will help address both needs.&rdquo;</p> <p>The conference also will include campus lab tours to provide a glimpse into the latest fluid-power research, including tours of the Laboratory for Systems Integrity &amp; Reliability (LaSIR). Tours of the Oakridge National Laboratory National Transportation Research Center (NTRC) and Manufacturing Demonstration Facility (MDF) are also offered. These tours will showcase the latest research underway on alternative energy and power systems, lightweight composite materials for transportation, additive manufacturing, model-integrated computing, and homeland and national security. This is an exciting time for fluid-power research in America. I hope our industry friends and supporters can attend the FPIRC14 conference and see for themselves what&rsquo;s going on.<br /> &nbsp;To register or learn more about any of the individual events or the complete series, visit <em>www.ccefp.org</em>.<br /> &nbsp;</p> </div> <div class="og_rss_groups"></div> http://hydraulicspneumatics.com/technologies/guest-editorial-future-fluid-power-north-america#comments Technologies Fri, 05 Sep 2014 19:49:00 +0000 28541 at http://hydraulicspneumatics.com