The Pumping Dynamics of Swash Plate Piston Pumps

[+] Author and Article Information
K. A. Edge

School of Mechanical Engineering, University of Bath, Bath, U.K.

J. Darling

Anthony Best Dynamics Ltd., Bradford-on-Avon, U.K.

J. Dyn. Sys., Meas., Control 111(2), 307-312 (Jun 01, 1989) (6 pages) doi:10.1115/1.3153051 History: Received November 01, 1986; Revised March 09, 1988; Online July 21, 2009


This paper describes a study of the cylinder pressure and flow in an oil hydraulic axial piston pump. A comparison is made between a theoretical model based on the effects of fluid compliance within the cylinder, and an improved model which accounts for the influence of oil momentum in the port plate region. The improved model is validated by comparison with experimental test results and is used to analyze the influence of port plate and relief groove design on cylinder pressure and pump flow ripple. A steeply sloping triangular cross-section groove was found to be the most satisfactory design.

Copyright © 1989 by ASME
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