In this research, the volumetric efficiency of the axial-piston pump is examined as it relates to the compressibility losses of the fluid. In particular, two valve-plate geometries are compared to show that alterations in the valve-plate design can cause differences in the operating efficiency of the pump. In this paper, a standard valve-plate design which utilizes slots is compared to a trapped-volume design which eliminates the slots altogether. In the analytical result of this paper, it may be shown that the standard valve-plate design introduces a volumetric loss which may be accounted for by the uncontrolled expansion and compression of the fluid that occurs through the slots themselves. By eliminating these slots, and utilizing a trapped volume design, it may be shown that improvements in the operating efficiency can be achieved. Though this paper does not claim to provide the ideal valve-plate design for all pump applications, it does provide the theoretical reason for utilizing trapped volumes and lends general insight into the overall problem of valve-plate design.
The Improved Volumetric-Efficiency of an Axial-Piston Pump Utilizing a Trapped-Volume Design
Contributed by the Dynamic Systems and Control Division for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the Dynamic Systems and Control Division Jan. 4, 2000. Associate Editor: F. Conrad.
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Manring , N. D., and Zhang, Y. (January 4, 2000). "The Improved Volumetric-Efficiency of an Axial-Piston Pump Utilizing a Trapped-Volume Design ." ASME. J. Dyn. Sys., Meas., Control. September 2001; 123(3): 479–487. https://doi.org/10.1115/1.1389311
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