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CLC number: TH13

On-line Access: 2015-05-04

Received: 2014-10-12

Revision Accepted: 2015-01-27

Crosschecked: 2015-04-13

Cited: 5

Clicked: 10071

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Bing Xu

http://orcid.org/0000-0003-0236-7896

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Journal of Zhejiang University SCIENCE A 2015 Vol.16 No.5 P.404-417

10.1631/jzus.A1400309


Effects of index angle on flow ripple of a tandem axial piston pump


Author(s):  Bing Xu, Shao-gan Ye, Jun-hui Zhang

Affiliation(s):  The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   bxu@zju.edu.cn

Key Words:  Axial piston pump, Flow ripple, Index angle, Sensitivity analysis.

This article has been corrected, see doi:10.1631/jzus.A14e0309


Bing Xu, Shao-gan Ye, Jun-hui Zhang. Effects of index angle on flow ripple of a tandem axial piston pump[J]. Journal of Zhejiang University Science A, 2015, 16(5): 404-417.

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T1 - Effects of index angle on flow ripple of a tandem axial piston pump
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DOI - 10.1631/jzus.A1400309


Abstract: 
A high noise level is one of the prominent shortcomings of an axial piston pump which is widely used in industrial and mobile applications. In this paper, a simulation model of an axial piston pump is developed based on a single piston chamber model, for capturing the dynamic characteristics of the discharge flow rate. The compressibility of fluid and main leakages across different friction pairs are considered. The simulation model is validated by a comparison of discharge flow ripple with the measured results using the secondary source method. The main cause of flow ripple is identified by a comparison of the frequency spectrums of actual and kinematic flow ripples. Flow rates with different index angles are analyzed in time and frequency domains. The findings show that an index angle of 20° is the most effective in reducing the flow ripple of a tandem axial piston pump, because the frequency contents at odd harmonics can be cancelled out. A sensitivity analysis is conducted at different pressure levels, speeds, and displacement angles, which reveals that with an index angle of 20°, the sensitivity of flow ripple can be reduced by almost 50% over a wide variety of working conditions.

The authors derived a simulation model of an axial piston pump to express its flow rate ripple, taking the fluid compressibility and main leakages across different friction pairs into consideration. Based on the results using the simulation model they claimed that the best index angle is 20° for a tandem axial piston pump utilizing nine pistons within one rotating group.

转位角对串联式轴向柱塞泵流量脉动的影响

目的:探索转位角对串联泵出口流量脉动的影响,揭示转位角对流量脉动的影响机理,获得最佳转位角以减小流量脉动,以及探索转位角对工况的敏感性。
方法:1.建立基于单柱塞腔模型的单柱塞泵模型,求解其出口流量脉动特性;2.研究不同转位角下串联泵的出口流量脉动,优选转位角;3.对比不同转位角下出口流量脉动对工况的敏感性。
结论:1.对于单个转子使用九柱塞的串联式轴向柱塞泵,最佳转位角是20°,因该角度可消除流量脉动在奇数阶次下的幅值;2.在大范围工况下,转位角为20°时可减小约50%的流量脉动。

关键词:轴向柱塞泵;流量脉动;转位角;敏感性分析

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

This article has been corrected, see doi:10.1631/jzus.A14e0309

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