Electrohydraulic Actuator Combines dc Motor, Reversing Gear or Gerotor Pump, Relief Valves, and Reservoir, Along with a Double-A

June 2, 2009
Parker Hannifin’s electrohydraulic actuator combines dc motor, reversing gear or gerotor pump, relief valves, and reservoir, along with a double-acting hydraulic cylinder for power density and low commissioning costs

Edited by Stephen J. Mraz

The compact electric hydraulic actuator (EHA) from Parker Hannifin’s Oildyne Div., New Hope, Minn. (www.parker.com), combines all the traditional components of an electrohydraulic linear actuator in a single unit encased in a cast monoblock housing. This reduces potential leak points, simplifies supplier management, shortens installation time, and boosts power density. For example, the unit includes a dc motor, reversing gear or gerotor pump, relief and check valves, reservoir, and double-acting hydraulic cylinder. All components are packaged in a one-piece IP67-rated anodized housing which is delivered flushed, filled, and sealed for “plug-n-play” installation.

Equipped with a fixedclearance gear pump, the device generates 5,000 lbf with noise below 60 dBA. With a gerotor, it delivers 1,600 lbf and noise is under 50 dBA. There are three standard bore sizes (1, 1.25 and 1.5 in.), strokes of 4, 6, or 8 in., and speeds to 4 ips. But the unit can be outfitted with various-sized cylinders and circuits to provide a range of speeds and output forces.

Sponsored Recommendations

Flexible Power and Energy Systems for the Evolving Factory

Aug. 29, 2024
Exploring industrial drives, power supplies, and energy solutions to reduce peak power usage and installation costs, & to promote overall system efficiency

Timber Recanting with SEW-EURODRIVE!

Aug. 29, 2024
SEW-EURODRIVE's VFDs and gearmotors enhance timber resawing by delivering precise, efficient cuts while reducing equipment stress. Upgrade your sawmill to improve safety, yield...

Advancing Automation with Linear Motors and Electric Cylinders

Aug. 28, 2024
With SEW‑EURODRIVE, you get first-class linear motors for applications that require direct translational movement.

Gear Up for the Toughest Jobs!

Aug. 28, 2024
Check out SEW-EURODRIVEs heavy-duty gear units, built to power through mining, cement, and steel challenges with ease!

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!