CLC number: TH13
On-line Access: 2016-03-07
Received: 2015-07-03
Revision Accepted: 2015-10-28
Crosschecked: 2016-02-15
Cited: 3
Clicked: 4733
Bing Xu, Min Hu, Jun-hui Zhang, Qi Su. Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions[J]. Journal of Zhejiang University Science A, 2016, 17(3): 186-201.
@article{title="Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions",
author="Bing Xu, Min Hu, Jun-hui Zhang, Qi Su",
journal="Journal of Zhejiang University Science A",
volume="17",
number="3",
pages="186-201",
year="2016",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1500197"
}
%0 Journal Article
%T Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions
%A Bing Xu
%A Min Hu
%A Jun-hui Zhang
%A Qi Su
%J Journal of Zhejiang University SCIENCE A
%V 17
%N 3
%P 186-201
%@ 1673-565X
%D 2016
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1500197
TY - JOUR
T1 - Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions
A1 - Bing Xu
A1 - Min Hu
A1 - Jun-hui Zhang
A1 - Qi Su
J0 - Journal of Zhejiang University Science A
VL - 17
IS - 3
SP - 186
EP - 201
%@ 1673-565X
Y1 - 2016
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1500197
Abstract: A good efficiency performance of a pump over a wide range of displacement conditions is crucially important for variable pump control systems to save energy. However, according to the literature, less attention has been paid to the understanding of the efficiency, leakage flow, and compression flow characteristics of the pump with respect to displacement conditions. In this study, a test bench was built, and a novel explicit volumetric loss model was proposed to investigate these problems. The overall efficiency is found to drop considerably with the decreasing displacement. The volumetric losses range from 13% to 47% of the total power losses of pump at the rated speed, under the conditions of pressure ranging from 5 to 35 MPa and displacement ranging from 13% to 100% of full displacement. The highest proportion of compression flow losses in the total volumetric losses of pump at the rated speed can reach up to 41% when the pressure and displacement are greater than 30 MPa and 88% of full displacement, respectively; after that, the proportion gradually decreases with decreasing displacement. However, the leakage flow generally increases with decreasing displacement, or may decrease first and begin to increase after the minimum with the further decrease of displacement. In the components of leakage of slipper/swash plate pair, the squeeze leakage is found to reach a magnitude equal to that of the Poiseuille leakage. The findings can guide the further research and design of pumps with better efficiency performance.
This work uses well-established theory as documented in the references. The useful aspect of the paper is that it shows the effect of varying displacement on the different losses. I am not aware of this appearing in any other paper so it makes this paper particularly useful. Both theoretical and experimental results are presented, my long-standing view being that fluid power analysis is only useful if it is supported by practical data.
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