鼓形柱塞结构对轴向柱塞泵柱塞副润滑性能影响  

Effect of the Drum-shaped Piston Structure on the Lubrication Performance of Piston-cylinder Interface in Axial Piston Pump

作　　者：廖名辉 葛磊 孙斌 肖刚 欧阳光明 张宏博 LIAO Minghui;GE Lei;SUN Bin;XIAO Gang;OUYANG Guangming;ZHANG Hongbo(College of Mechanical and Vehicle,Taiyuan University of Technology,Taiyuan,Shanxi 030024;Jiangsu Advanced Construction Mechanical Innovation Center Co.,Ltd.,Xuzhou,Jiangsu 221001)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]江苏汇智高端工程机械创新中心有限公司,江苏徐州221001

出　　处：《液压与气动》2025年第4期22-30,共9页Chinese Hydraulics & Pneumatics

基　　金：国家重点研发计划(2023YFB3406600);江苏省科技计划专项重点项目(BE2022096)。

摘　　要：柱塞副作为轴向柱塞泵三大关键摩擦副之一,其润滑性能直接关系到泵的可靠性与使用寿命。建立了柱塞副的雷诺方程与受力方程,采用MATLAB对其离散化处理和求解。对比分析鼓形柱塞副与普通柱塞副在相同工况下的最小油膜厚度、油膜压力、黏性摩擦力及泄漏特性方面的差异。结果表明:相较于普通柱塞副,鼓形柱塞副具有更大的最小油膜厚度,提升了柱塞副润滑性能;同时,鼓形柱塞副存在明显的压力波峰,油膜受到的挤压效应更为显著;鼓形柱塞副能够减少柱塞表面所受轴向及周向黏性摩擦力,提升油液流动效率;鼓形柱塞副会增加运动过程中的泄漏量,导致密封性能降低。该研究结果可以为改善柱塞副润滑性能提供一定的理论依据。The piston-cylinder interface,as a key friction pair in an axial piston pump,directly affects its reliability and service life.This paper establishes the Reynolds equation and force equation for the piston-cylinder interface,and solves them using discretization in MATLAB.A comparative analysis of the minimum film thickness,film pressure,friction,and leakage between the drum-shaped and conventional piston-cylinder interfaces under the same conditions is conducted.The results show that,compared to the conventional piston-cylinder interface,the drum-shaped piston-cylinder interface has a larger minimum film thickness,improving lubrication performance.It also exhibits distinct pressure peaks,with more significant squeezing effects on the film.The drum-shaped piston reduces axial and circumferential viscous friction,enhancing fluid flow efficiency,but increases leakage during motion,reducing sealing performance.These findings provide a theoretical basis for improving the lubrication performance of the piston-cylinder interface.

关 键 词：轴向柱塞泵 鼓形柱塞副 润滑性能 

分 类 号：TH137[机械工程—机械制造及自动化]