表面粗糙度对织构化动压轴承特性影响研究  

Effect of Surface Roughness on Characteristics of Textured Hydrodynamic Bearings

作　　者：王鸿涛 张绍林[1] 杨帅[1] Wang Hongtao;Zhang Shaolin;Yang Shuai(College of mechanical and power engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,河南郑州450001

出　　处：《机械传动》2022年第8期16-21,共6页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51575498)。

摘　　要：针对带有表面微织构的径向动压轴承,采用高斯随机粗糙表面模拟轴瓦表面粗糙度,建立了表面微织构和粗糙度耦合作用下轴承油膜特性数学模型;在此基础上,计算不同偏心率及转速下油膜静、动特性参数,并分析了粗糙度对织构化动压轴承压力分布、失稳转速等的影响。结果表明,各偏心下适当的表面粗糙度能够提升织构化动压轴承油膜压力及承载能力;摩擦力及平均温升亦有上升,且粗糙度造成织构化动压轴承失稳转速降低。将理论结果与M2000型摩擦磨损试验机测试结果进行对比,验证了模型的合理性。研究对同时计入粗糙度和织构的滑动轴承润滑机理研究有一定的借鉴意义。For a radial hydrodynamic bearing with surface micro texture,the Gauss random rough surface is used to simulate the surface roughness of the bearing bush.A mathematical model of bearing oil film charac⁃teristics is established under the coupling of surface micro texture and roughness.On this basis,the static and dynamic characteristic parameters under different eccentricities and speeds are calculated and the influence of the surface roughness on the pressure distribution and instability threshold speed of textured hydrodynamic bear⁃ings are analyzed.The results show that the proper surface roughness can improve the oil film pressure and bear⁃ing capacity under certain eccentricities,the friction force and average temperature rise also increase,and the in⁃stability speed of textured hydrodynamic bearing decreases due to roughness.The theoretical results are com⁃pared with the test results of the M2000 friction and wear testing machine to verify the rationality of the model.The research has certain reference significance for the study of the lubrication mechanism of sliding bearings that take into account both roughness and texture.

关 键 词：动压轴承 表面粗糙度 微织构 特性参数 

分 类 号：TH133.37[机械工程—机械制造及自动化]