Filtration for servo systems
The most effective way to reduce life cycle costs of an oil hydraulic system, regardless of the types of valve used, is through close attention to contamination control.
Hydraulic motor inside
A conventional conveyor system uses an externally mounted electric or hydraulic motor to drive the conveyor’s head pulley. A hydraulic motor can extend up to 20 in. from the end of the pulley. In addition to taking up space, the motor can be in the way of equipment and personnel, causing damage or injury. The motor also requires a shaft coupling or chain drive that can be hard to keep clean and require maintenance.
Dealing with overhung load
Whether input power comes from an electric motor, gasoline or diesel engine, or PTO on a transmission, hydraulic pumps typically are driven through an industry-standard flange. This arrangement ensures that the mating shafts are always aligned and that no side load is transmitted to the pump’s input shaft.
Cylinders make crane stand tall
The Hiab XS 1055 truck-mounted crane, from Cargotec Corp., Helsinki, takes full advantage of the power and controllability of hydraulics. It uses what Hiab calls an E-link system — a type of lever connection from the crane’s column cylinder to the inner boom and inner boom cylinder to the outer boom. It connects the pivot point of both cylinders’ rod ends to mechanical links that improve vertical lifting of loads to high elevations. The links force out the boom cylinders to obtain a long lever arm, which ensures maximum mechanical advantage between the booms and cylinders in all boom positions.
Squeeze energy savings from pneumatic systems
Industrial machines designed to run efficiently and save energy are undoubtedly important considerations in manufacturing today. The reasons not only include rising energy prices and the need to hold down production costs, but also an increasing awareness of the environmental impact on an organization’s sustainability.
These issues should not be the responsibility of only production-floor personnel. Machine and system designers and financial managers have a stake in this as well. Energy can be saved eliminating leaks, system design, and advanced machine diagnostics.
Last-chance filters
HIL Series inline porous bronze filter elements protect servovalves and other delicate components by trapping particles 25 µm and larger in hydraulic lines with pressure ratings to 5000 psi
. The filter can be cleaned or replaced without breaking line connections. Anodized aluminum alloy housing comes with Buna-N O-rings, Viton optional. Elements also available in 10-, 40-, or 90-µm ratings.
Tracked carrier shows its versatility
When officials at Rig Source Inc., Elburn, Ill., decided to develop a new tracked carrier, they knew it had to be versatile. According to Mike Crimaldi, president of Rig Source, other carriers, especially those from offshore suppliers, either come loaded with features and capabilities that customers don’t need, or they come in a basic, stripped down model. Either way, equipment owners don’t want to pay for options they won’t use or wait for a basic model to be built up.
A gold mine of opportunities
If you’re involved in the mining industry, then attending MINExpo is probably a no-brainer. But even if your job entails nothing at all to do with mining, there’s a good chance MINExpo still has plenty to offer.
Miniature quick-acting couplings
QD3L line of fluid couplings has M8 threads, 99/16-in. hexagonal OD, and 0.180-in. flow orifice. Made of 303 stainless steel with pressure rating of 250 psi and Viton or EPDM seals. Double shutoff design minimizes space between the internal and external ends when connected to essentially eliminate any leakage when disconnecting.
Beswick Engineering, (603) 433-1188, www.beswick.com
Position sensor
Positape linear displacement transducers are said to have twice the life of cable-and-spool types. WB100M has stainless steel extension tape and IP 67/69K rating to withstand seawater and other harsh environments. Available for measuring maximum strokes from 2000 mm to 10,000 mm. Comes with range of analog or digital outputs FSO error of ±0.05%.
ASM Sensors Inc., (630) 832-3202, www.asm-sensor.com
Proportional directional valves
PSL (for fixed-displacement hydraulic systems) and PSV (for variable displacement) proportional directional spool valves accommodate flows to 63 gpm and pressures to 6090 psi. Manual, hydraulic piloted, or electro-hydraulic actuation provides a high degree of proportional control for precise positioning and high maneuverability of mobile equipment. Load-sensing feature provides optimal utilization of the installed power.
AC and DC joysticks
NS2/NSB2-KB series of compact joystick controllers are intended for use in mills, process lines, foundries, mining shovels, etc. under continuous duty cycles. Small footprint and mounting hole pattern allows for direct replacement of master switches. Their cast construction is sealed to IP65.
High flow mini relief valve
Hi-Q pressure relief valve accommodates high relief pressure and high flow rate in a compact package. It is capable of relief pressures to 5400 psid and flow rates more than 19 gpm. Side inlet flow reduces installation boss size and weight. The valve comes with cracking pressures from 1000 to 5400 psid. It is designed for nominal system pressures to 5000 psi and system peak pressures up to 6750 psi. Each is 100% inspected and tested.
The Lee Co., (860) 399-6281, www.theleeco.com
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