Study on friction performance and mechanism of slipper pair under different paired materials in high-pressure axial piston pump  

作　　者：Huaichao WU Limei ZHAO Siliang NI Yongyong HE 

机构地区：[1]School of Mechanical Engineering,Guizhou University,Guiyang 550025,China [2]State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China

出　　处：《Friction》2020年第5期957-969,共13页摩擦（英文版）

基　　金：This project was supported by the National Key Basic Research Program of China(973 Program,2014CB046404);training plan for high-level innovative talent in Guizhou province(Grant No.Q.K.H.P.T.R.C[2016]5659);preferred project of scientific and technological activities for personnel studying abroad in Guizhou province(Grant No.Q.R.X.M.Z.Z.H.T[2018]0001);science and technology planning project in Guizhou Province(Grant No.Q.K.H.P.T.R.C[2017]5788);key research project on Innovation group of Guizhou Provincial Education Department(Grant No.Q.J.H.KY Z.[2018]011).

摘　　要：High-pressure axial piston pumps operate in high-speed and high-pressure environments. The contact state of the slipper against the swashplate can easily change from an oil film lubrication to a mixed oil film/asperity contact, or even dry friction. To improve the dry friction performance of slipper pairs and to avoid their potentially rapid failure, this study examined the effects of material matching on the dry friction performance of the slipper pair for high-pressure axial piston pumps. A FAIAX6 friction and wear tester was developed, and the dry friction coefficients of the slipper pairs matched with different materials were studied using this tester. Based on the thermo-mechanical coupling of the slipper pair with the working process, the contact surface temperatures of the slipper pairs matched with different materials were calculated and analyzed for the same working conditions. Following this, the effects of the material properties on the temperature increase at the slipper sliding contact surfaces were revealed. The reliabilities of the temperature calculations and analysis results were verified through orthogonal tests of slipper pairs matched with different materials. The results indicate that the influence of the material density on the friction coefficient is greater than that of the Poisson's ratio or the elastic modulus, and that the slipper material chosen should have a high thermal conductivity, low density, and low specific heat, whereas the swashplate material should be high in specific heat, density, and thermal conductivity;in addition, the slipper pair should be a type of hard material to match the type of soft material applied;that is, the hardness of the swashplate material should be greater than that of the slipper material.

关 键 词：axial piston pump slipper pair material matching dry friction TEMPERATURE 

分 类 号：V245.1[航空宇航科学与技术—飞行器设计]