自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 3    March 2017

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Distribution characteristics and impact on pump’s efficiency of hydro-mechanical losses of axial piston pump over wide operating ranges
XU Bing(徐兵), Hu Min(胡敏), ZHANG Jun-hui(张军辉), MAO Ze-bing(毛泽兵)

State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Abstract:A novel performance model of losses of pump was presented, which allows an explicit insight into the losses of various friction pairs of pump. The aim is to clarify that to what extent the hydro-mechanical losses affect efficiency, and to further gain an insight into the variation and distribution characteristics of hydro-mechanical losses over wide operating ranges. A good agreement is found in the comparisons between simulation and experimental results. At rated speed, the hydro-mechanical losses take a proportion ranging from 87% to 89% and from 68% to 97%, respectively, of the total power losses of pump working under 5 MPa pressure conditions, and 13% of full displacement conditions. Furthermore, within the variation of speed ranging from 48% to 100% of rated speed, and pressure ranging from 14% to 100% of rated pressure, the main sources of hydro-mechanical losses change to slipper swash plate pair and valve plate cylinder pair at low displacement conditions, from the piston cylinder pair and slipper swash plate pair at full displacement conditions. Besides, the hydro-mechanical losses in ball guide retainer pair are found to be almost independent of pressure. The derived conclusions clarify the main orientations of efforts to improve the efficiency performance of pump, and the proposed model can service for the design of pump with higher efficiency performance.

 

Key words: axial piston pump; efficiency; hydro-mechanical losses; digital prototyping; distribution characteristics; over wide operating ranges

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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