Experimental Study on the Influence of the Rotating Cylinder Block and Pistons on Churning Losses in Axial Piston Pumps

Junhui Zhang, Ying Li, Bing Xu, Min Pan and Fei Lv
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Junhui Zhang: State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Zheda Road 38, Hangzhou 310027, China
Ying Li: State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Zheda Road 38, Hangzhou 310027, China
Bing Xu: State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Zheda Road 38, Hangzhou 310027, China
Min Pan: Department of Mechanical Engineering, University of Bath, Bath BA2 7AY, UK
Fei Lv: State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Zheda Road 38, Hangzhou 310027, China

Energies, 2017, vol. 10, issue 5, 1-15

Abstract: Pressure and performance requirements of axial piston pumps and the proportion of churning losses in axial piston pumps increase significantly with increasing speed. To investigate the primary distribution of churning losses in axial piston pumps at various ranges of speed, a test rig was set up in which other friction losses can be eliminated, thus making it possible to investigate the net churning losses in an axial piston pump. The influence of the rotating cylinder block and pistons on churning losses is analyzed based on a qualitative evaluation of the various fluid flow regimes at different test speeds in an axial piston pump. The analytical results indicate that pistons have less influence on churning losses than the rotating cylinder block beyond the critical speed in axial piston pumps, because the total energy dissipation transforms laminar viscous friction losses into turbulent shear stress losses. It is concluded that more attention should be given to the effect of the rotating cylinder block on churning losses in axial piston pumps at high rotation speed.

Keywords: axial piston pumps; churning losses; rotating cylinder block; pistons; experimental study (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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