Analysis of the flow dynamics characteristics of an axial piston pump based on the computational fluid dynamics method

Bin Zhang,Jien Ma,Haocen Hong,Huayong Yang,Youtong Fang

doi:10.1080/19942060.2015.1091686

Bin Zhang, Jien Ma + Show 3 more

Open Access

https://doi.org/10.1080/19942060.2015.1091686

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Abstract

ABSTRACTTo improve its working performance, the flow ripple characteristics of an axial piston pump were investigated with software which uses computational fluid dynamics (CFD) technology. The simulation accuracy was significantly optimized through the use of the improved compressible fluid model. Flow conditions of the pump were tested using a pump flow ripple test rig, and the simulation results of the CFD model showed good agreement with the experimental data. Additionally, the composition of the flow ripple was analyzed using the improved CFD model, and the results showed that the compression ripple makes up 88% of the flow ripple. The flow dynamics of the piston pump is mainly caused by the pressure difference between the intake and discharge ports of the valve plates and the fluid oil compressibility.

Highlights

An axial piston pump, the most important component of hydraulic systems, is widely used in the fluid power industry because of its robustness, controllability, wide operating range and compact size
A hybrid trust bearing was developed as a slipper model of water hydraulic piston pumps and motors, and numerical solutions of the time-dependence problem were built for a wide range of operations under water-lubricated conditions
It should be emphasized that the character of the fluid oil is most meaningful with respect to the flow ripple of the piston pump

Summary

Introduction

The most important component of hydraulic systems, is widely used in the fluid power industry because of its robustness, controllability, wide operating range and compact size. In order to study the influence of the slipper model on hydraulic pumps’ flow dynamics characteristics, a time-dependent mathematical model of a hybrid trust pad bearing as a slipper of swash-plate-type axial piston pumps and motors was presented (Kazama, 2005). A hybrid trust bearing was developed as a slipper model of water hydraulic piston pumps and motors, and numerical solutions of the time-dependence problem were built for a wide range of operations under water-lubricated conditions

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Conclusion