不同预载机制和过盈量下角接触球轴承的动力学特性  

Dynamic characteristics of angular contact ball bearings under different preloading mechanisms and interference amount

作　　者：李震 王青山 王瑞华 秦斌 LI Zhen;WANG Qingshan;WANG Ruihua;QIN Bin(College of Mechanical and Electrical Engineering,Central South University,Changsha 410012,China;School of Traffic and Transportation Engineering,Central South University,Changsha 410015,China)

机构地区：[1]中南大学机电工程学院,长沙410012 [2]中南大学交通运输工程学院,长沙410015

出　　处：《航空动力学报》2024年第4期267-278,共12页Journal of Aerospace Power

基　　金：国家自然科学基金(52075554)。

摘　　要：基于Hertz弹性接触理论和无滚道控制理论,建立了不同预载机制下五自由度角接触球轴承拟静力学分析模型,采用牛顿拉夫逊法对已建立的模型进行数值求解,探究预载机制和过盈量对角接触球轴承动力学特性的影响。通过将已建立模型求解接触角和轴承刚度结果与已有文献结果进行对比,验证模型的有效性。分别探究了过盈量对内外圈装配压力和滚道接触变形量的影响以及过盈量和预载机制对轴承刚度的影响。结果表明:随过盈量增加,内外圈装配压力增加,初始接触角减小;随着过盈量增加,轴承径向刚度增加,轴向刚度和角刚度减小;与定压预紧相比,定位预紧能够提高轴承刚度;探究转速对接触变形和装配压力的影响,确定了松脱旋转速度约为40000 r/min。Based on Hertz elastic contact theory and raceless control theory,a quasi-static analysis model of angular contact ball bearings with five degrees of freedom under different preloading mechanisms was established.Newton Raphson method was used to numerically solve the established model for exploring the influences of preloading mechanisms and interference amount on the dynamic characteristics of angular contact ball bearings.The effectiveness of the model was verified by comparing the results of contact angle and bearing stiffness of the established model with those of existing literature.The influences of the interference amount on the assembly pressure of the inner and outer rings and the contact deformation of the raceway as well as the influences of the interference amount and the preloading mechanisms on the bearing stiffness were explored.The results showed that with the increase of interference,the assembly pressure of inner and outer rings decreased and the initial contact angle decreased;with the increase of interference,the radial stiffness of the bearing increased,while the axial stiffness and angular stiffness decreased;compared with constant pressure preloading,positioning preloading can improve the bearing stiffness;ghe influence of rotation speed on contact deformation and assembly pressure was investigated,and the release rotation speed was determined to be about 40000 r/min.

关 键 词：过盈量 预载机制 牛顿拉夫逊 轴承刚度 接触角 

分 类 号：V229.2[航空宇航科学与技术—飞行器设计]