Efficiency and Low Speed Behavior of the Floating Cup Pump 2004-01-2653
The floating cup principle is a new axial piston concept for hydrostatic machines. It features a high number of pistons, arranged in a double ring, back-to-back configuration. Furthermore the pistons are locked onto a central rotor and each piston has its own cuplike cylinder. These ‘cups’ are floating on and supported by a barrel plate. The pistons have a ball shaped crown, which is sealing directly on the cylinder without a piston ring.
A first prototype of the new pump has been built and tested. For comparison a state-of-the-art slipper type pump and a bent axis pump (both constant displacement, 28 cc/rev) have been tested as well. The steady-state performance tests have proven the high efficiency of the floating cup principle. The low speed tests, during which the pumps are tested as a motor, have confirmed the low friction losses and high starting torque of the floating cup principle. Furthermore the high number of pistons strongly reduces the torque variations. This paper describes and analyzes the outcome of the measurements.
Citation: Achten, P., Schellekens, M., Murrenhoff, H., and Deeken, M., "Efficiency and Low Speed Behavior of the Floating Cup Pump," SAE Technical Paper 2004-01-2653, 2004, https://doi.org/10.4271/2004-01-2653. Download Citation
Author(s):
Peter A. J. Achten, Marc P. A. Schellekens, Hubertus Murrenhoff, Michael Deeken
Affiliated:
Innas BV, Institute for Fluid Power Drives and Controls (IFAS), RWTH Aachen University
Pages: 13
Event:
SAE Commercial Vehicle Engineering Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 2004 Transactions Journal of Commercial Vehicles-V113-2
Related Topics:
Pistons
Engine cylinders
Performance tests
Pumps
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
