Unrivalled power density from new Parker compact electro-hydraulic actuator

11th June 2010
Posted By : ES Admin
Unrivalled power density from new Parker compact electro-hydraulic actuator

Parker Hannifin, has launched an innovative new Compact Electro-Hydraulic Actuator (EHA) that provides a complete, free standing actuation system for space critical, portable and remote applications. Offering unrivalled power, speed and durability, Parker's Compact EHA is a fully self-contained, double-acting actuator offering an exceptionally high power density at operating speeds of over 100mm/sec. This makes the new Compact EHA ideal for use as an alternative to conventional linear movement technologies such as electromechanical and pneumatic drives, in applications ranging from military and aerospace, to marine, construction and general industrial use.

The unique design of the new Parker Compact EHA sees all components integrated into the monobloc housing, making for exceptionally 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. Trunnion pin mounting holes are set within the base of the housing and at the end of the piston rod for ease of installation; all that is required are mounting pins and motor connections.

Each piston rod is 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. The monobloc housing is produced from anodised aluminium, providing a relatively lightweight, tough and corrosion resistant unit that is sealed to IP67 standard. Compact EHA is supplied by Parker fully tested, flushed and filled with fluid ready for operation, so is fully sealed and requires no subsequent maintenance.

The design and construction of the new Compact EHA actuator enables it to produce exceptionally high levels of force, up to 22.25kN on extension and up to 15.57kN 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 -29ºC and +65ºC, and generates less than 60dB of noise. Compact EHA is available 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.

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