New generation Compact EHA offers even greater flexibility
Parker Hannifin’s Compact EHA electro-hydraulic actuator has won a strong following for its unrivalled combination of power, speed and durability, making it an ideal choice for space critical, portable and remote applications. With the launch of Compact EHA generation II, Parker has added universal orientation and the option of a manual release function, providing greater versatility for the designer and enhanced safety for the operator.
Compact EHA is a fully self-contained, double-acting actuator which offers exceptionally high power density at operating speeds of up to 84mm/sec. This makes it a robust and maintenance-free alternative to conventional hydraulic, electro-mechanical and pneumatic systems, in applications ranging from military and aerospace, to marine, leisure, construction and general industrial use.
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The new generation of Compact EHA offers benefits for both the designer and end user, with easier specification and enhanced versatility and operator safety. Universal orientation reduces the need to specify and stock different variants as all new Compact EHA models will work in any position. The new manual release option allows the operator to manually move the load in emergency conditions such as loss of power. Where a complete, single source solution is needed, Parker now offers a bespoke design service including wiring harness, switchgear and power supply.
The unique design of Parker’s Compact EHA sees all components integrated into an anodised aluminium one-piece housing, resulting in a rugged and compact construction. The unit comprises a high performance, double-acting hydraulic actuator, driven via a reversible gear pump, which is powered by an integrated 12v or 24V DC motor. The pump is enclosed within the hydraulic fluid reservoir, with pressure relief and check valves also being incorporated within the system assembly.
Actuator piston rods are manufactured from stainless steel, with a micro-finished cylinder bore featuring buna-nitrile and polyurethane sealing elements, to prevent both leakage and the ingress of contaminants. Trunnion pin mounting holes are set within the base of the housing and at the end of the piston rod for ease of installation. Compact EHA is corrosion resistant and sealed to IP67 standard, and is supplied by Parker fully tested, flushed and filled with fluid, ready for operation. Commissioning requires only mounting pins and motor connections.
The design and construction of the Compact EHA actuator enables it to produce exceptionally high levels of force, delivering up to 21.3kN on extension and up to 16kN on retraction. By comparison with conventional ballscrew or linear motion systems, Compact EHA is free from problems of backlash and does not require any form of gearing, so is unaffected by wear and loss of positional accuracy.
The new actuator can be used at operating temperatures of between -34ºC and +65ºC, and generates less than 70dB of noise. Compact EHA is offered with a range of options for motor, pump, bore and stroke length, making the new system an ideal choice for machine builders looking for a simple and efficient method of providing fast, high power linear motion.
Parker Hannifin Ltd, Sales Company UK, Tachbrook Park Drive, Warwick CV34 6TU
Tel: 00800 27 27 5374
email: parker.uk@parker.com
