Technical Briefs

The Analysis of Cavitation Problems in the Axial Piston Pump

[+] Author and Article Information
Shu Wang

 Eaton Corporation, 14615 Lone Oak Road, Eden Prairie, MN 55344

J. Fluids Eng 132(7), 074502 (Jul 22, 2010) (6 pages) doi:10.1115/1.4002058 History: Received February 25, 2010; Revised June 22, 2010; Published July 22, 2010; Online July 22, 2010

This paper discusses and analyzes the control volume of a piston bore constrained by the valve plate in axial piston pumps. The vacuum within the piston bore caused by the rise volume needs to be compensated by the flow; otherwise, the low pressure may cause the cavitations and aerations. In the research, the valve plate geometry can be optimized by some analytical limitations to prevent the piston pressure below the vapor pressure. The limitations provide the design guide of the timings and overlap areas between valve plate ports and barrel kidneys to consider the cavitations and aerations.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 1

The typical axis piston pump

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Figure 2

Timing of the valve plate

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Figure 3

The control volume of the piston bore

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Figure 4

Valve plate and silencing groove geometries

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Figure 5

Overlap area of the valve plate port and barrel kidney at the BDC

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Figure 6

Overlap area of the valve plate port and barrel kidney at the TDC

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Figure 7

Piston bore pressure at the BDC

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Figure 8

Piston bore pressure at the TDC

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Figure 9

Observed cavitations/aerations on the tested original valve plate



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