弹流状态下深沟球轴承刚度阻尼研究  

Research on stiffness and damping of the deep groove ball bearing under EHL conditions

作　　者：夏伯乾[1] 戴一民 张泽斌[1] XIA Boqian;DAI Yimin;ZHANG Zebin(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;China Academy of Machinery Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001 [2]中国机械总院集团郑州机械研究所有限公司,郑州450001

出　　处：《机械传动》2025年第3期33-39,59,共8页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(12272354)。

摘　　要：【目的】油润滑的滚动轴承滚动体与滚道间很容易形成弹流润滑(Elasto-Hydrodynamic Lubrication,EHL),弹流油膜对滚动轴承的刚度阻尼具有不可忽视的重要作用,研究和计算滚动轴承的刚度阻尼必须考虑弹流润滑的作用和影响。【方法】应用点接触弹流摩擦副刚度阻尼拟合公式,研究了载荷和转速对深沟球轴承刚度阻尼的影响,并将理论计算结果和有关的试验结果进行了比较分析。【结果】结果表明,转速一定时,深沟球轴承径向刚度和阻尼随载荷的增加而增大;载荷一定时,深沟球轴承径向刚度和阻尼随转速的增大而成指数减小。理论计算的滚动轴承刚度阻尼随载荷、速度的变化趋势与试验结果一致,证明了理论计算结果的正确性。研究同时表明,点接触弹流摩擦副刚度阻尼拟合公式是正确的,为计算弹流状态下滚动轴承的动特性提供了便利。[Objective]Oil lubricated rolling bearings can easily form elasto-hydrodynamic lubrication(EHL)between the rolling element and the raceway.The EHL oil film plays an important role in the stiffness and damping of rolling bearings,and the study and calculation of the stiffness and damping of rolling bearings must consider the role and influence of EHL oil film.[Methods]Applying the fitting formula for stiffness and damping of point contact EHL friction pairs,the influence of load and speed on deep groove balls bearing stiffness and damping was investigated,and the theoretical calculation results were compared and analyzed with relevant test results.[Results]The results show that the radial stiffness and damping of rolling bearings increase with the increase of load when the rotational speed is constant,and decrease exponentially with the increase of rotational speed when the load is constant.The variation trend of stiffness and damping of rolling bearings with load and speed is completely consistent with the test results,proving the correctness of the theoretical calculation results.The results also indicate that the fitting formula for stiffness and damping of point contact EHL friction pairs is correct,providing convenience for calculating the dynamic characteristics of rolling bearings under EHL conditions.

关 键 词：弹流润滑 深沟球轴承 刚度 阻尼 

分 类 号：TH117[机械工程—机械设计及理论]