涂层材料特性对滚子轴承润滑性能的影响  

Effect of Coating Material on Roller Bearings Lubricating Performance

作　　者：王志坚 董宇微 张学飞[1] WANG Zhijian;DONG Yuwei;ZHANG Xuefei(School of Mechanical Engineering and Rail Transit,Changzhou University,Changzhou Jiangsu 213100,China)

机构地区：[1]常州大学机械与轨道交通学院,江苏常州213100

出　　处：《润滑与密封》2022年第12期158-163,共6页Lubrication Engineering

基　　金：江苏省普通高校自然科学研究计划项目(20KJD460002)。

摘　　要：涂层材料被广泛应用于滚子轴承中以改善界面性能和提高疲劳寿命,为了探讨涂层材料性能对滚子轴承润滑性能的影响,基于流体力学与接触力学理论,建立带涂层的有限长线接触弹流润滑模型,探讨不同载荷、速度以及涂层材料特性对油膜压力、油膜厚度的影响。研究表明:随着涂层厚度的增加,硬涂层使得最小油膜厚度先增加后减小,而软涂层轻载时使得最小油膜厚度先减小后增加,重载时最小油膜厚度一直减小;随着速度的增加,出口区二次压力峰值增加,硬涂层尤为明显,并且油膜厚度也增加,油膜平坦区域减小,出口区油膜紧缩值增加。为提高润滑性能,当使用较厚软涂层时应考虑增加滚子凸度量,而使用较厚硬涂层时应考虑减小滚子凸度量。Coatings are widely used in roller bearings to enhance interface performance and improve fatigue life.In order to study the effect of coatings material properties on the lubrication performance of the roller bearings,the finite length line contact elastohydrodynamic lubrication model incorporating with coating properties was established.The influence of the coating material properties and coating thickness on lubricant film pressure and film thickness were investigated.The results show that as the coating thickness increases,the minimum film thickness for the stiff coating initially increases then decreases,while the minimum film thickness for the soft coating initially decreases then increases at light loads,and always decreases at heavy load.As the velocity increases,the pressure spike at the exit region increases,especially for the stiff coating.And the film thickness also increases,the flat region of the film decreases,the local reduction of the film thickness at the exit region increases.In order to improve the lubrication performance,when using a thicker soft coating,the crown value of the roller should be increased.However,when using a thicker stiff coating,the crown value of the roller should be reduced.

关 键 词：涂层 滚子轴承 弹流润滑 成膜性能 

分 类 号：TH133.33[机械工程—机械制造及自动化]