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Analysis of temperature distribution and leakage of slipper pair of radial piston pump under viscous temperature and pressure characteristics
Published:2024-10-30 author:LI Shaonian, ZHANG Ziqian, CHEN Shihao, et al. Browse: 144 Check PDF documents
Analysis of temperature distribution and leakage of slipper pair of radial 
piston pump under viscous temperature and pressure characteristics


LI Shaonian1,2, ZHANG Ziqian1,2, CHEN Shihao1,2, YANG Longtao1,2

(1.College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2.Key Laboratory of 
Advanced Pumps, Valves and Fluid Control System Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China)


Abstract:  Aiming at the problem of friction failure and leakage of the slipper pair in high-pressure large displacement radial piston pumps, the temperature distribution and leakage of the slipper pair on XDP1000 radial piston pump were researched by simulation and numerical calculation. Firstly, based on the kinematic characteristic analysis of the slipper and piston kits, the variation law of the deflection angle of slipper was solved. And the hydrostatic bearing characteristic was established from the flow calculation formulas for different channels of the slipper pair. Then the optimal oil film thickness and its variation law of the slipper pair were solved after establishing models for the leakage power loss and friction power loss of the slipper pair. Finally, based on the consideration of the characteristics of viscosity temperature and pressure of the oil, the laws of temperature distribution and leakage rate of the slipper pair were studied through numerical calculation of flow field. The research results show that the optimal oil film thickness of the slipper pair under rated operating conditions is about 14 μm. And it increases with the increase of rotor angle, and decreases with the increase of working pressure and temperature. The temperature of oil film on the direction of the slipper is 13 K higher than that on the other side, and the temperature value is basically not affected by the working pressure, but increased with the increase of speed. The leakage rate at the damping hole of the slipper pair is 0.02 kg/s greater than that at the boundary of slipper, and the leakage rate increases with the increase of pressure, speed, and oil temperature. It can provide reference to design the slipper pair of high-pressure large displacement radial piston pumps.

Key words: highpressure and largedisplacement radial piston pump; static pressure support characteristics; optimal oil film thickness; temperature distribution in fluid domain; oil viscosity temperature and pressure characteristics; work pressure; rotor speed; flow field simulation and numerical calculation


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