Study on the characteristics of oil film load capacity for axial piston pump

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ABSTRACT

The oil film between the cylinder block and valve plate represents one of the most critical designs in the rotating kit of an axial piston pump. The finite difference and relaxation iterative methods are used to solve the Reynolds equation of the oil film pressure for axial piston pump valve plate pair. Simulating the oil film thickness and pressure distribution. Analysing the change of kidney-shaped slot’s pressure to the load carrying capacity and offset load torque. The lubricating characteristics of wedge-shaped oil film and the maximum pressure under different working conditions are comparative analysis. The result shows that the oil film thickness changed when cylinder block is tilt relative to the valve plate and produced hydrodynamic effects. The load capacity and offset load torque of oil film increase with increasing inlet pressure. The structural parameter of the valve plate pair influenced lubrication characteristics.

KEYWORDS:

• Axial piston pump
• valve plate pair
• Reynolds equation
• wedge-shaped oil film
• lubricating characteristics

Disclosure statement

No potential conflict of interest was reported by the author.

Additional information

Funding

This study was funded by the Project (No. 51505272 and No. 51505274) supported by National Natural Science Foundation of China and the Project (No. GZKF-201514) supported by Open Foundation of the State Key Laboratory of Fluid Power and Mechatronic Systems.

Notes on contributors

Zhaoqiang Wang

Zhaoqiang Wang, who was born in April 1981, Shandong province, China. and received his Ph.D. from the State Key Laborataory of Fluid Power & Mechatronic Systems in Zhejiang university in 2014. He is currently working as a teacher in Shanghai University of Engineering Science. On the other hand, his research interest:1.Fluid Power and Transmission Control.

Shan Hu

Shan Hu, he is currently studying for a master degree in Shanghai University of Engineering Science.

Hong Ji

Ji Hong, doctor. received his Ph.D. fromthe State Key Laboratory for fluid transmission and control at Zhejiang University in 2005.The research direction is modern hydraulic components and engineering machinery hydraulic technology.

Zhen Wang

Zhen Wang, he is currently studying for a master degree in Shanghai University of Engineering Science.

Wei Liang

Liang Wei, funded by “Young Oriental Scholars” and “Chenguang Project” in Shanghai, and Ph.D. in Materials Science of Measurement and Control Engineering at Bayreuth University, Germany. Now engaged in the surface acoustic wave based sensor and exciter detection and control research.