基于轴承边界元法的轧机圆锥滚子轴承的载荷研究  

Analysis of the load distribution of mill conical roller bearing boundary element method

作　　者：杨霞[1] 肖宏[2] 陈泽军[3] 

机构地区：[1]太原科技大学,太原030024 [2]燕山大学,秦皇岛066004 [3]重庆大学,重庆400044

出　　处：《应用力学学报》2014年第1期137-143,12,共7页Chinese Journal of Applied Mechanics

基　　金：973计划前期研究专项课题(2011CB612204);山西省国际合作项目(2012081015);太原科技大学科研启动项目(20112006)

摘　　要：采用边界元法对高度非线性的滚动轴承接触问题进行了研究。利用轴承边界单元模拟轴承接触单元,采用赫兹接触理论对滚动体与轴承内外圈的接触宽度进行修正;根据轧机圆锥滚子轴承安装配合时轴承内圈与轧辊、轴承外圈与轴承座均采用松配合的特点,在多物体有摩擦弹性接触的边界元法基础上,编制了四物体有摩擦弹性接触的专用轴承边界元法计算程序;并对轧机四列圆锥滚子轴承进行了数值分析,验证了算法的可行性和有效性。结果表明:四列滚动体上圆锥滚子小端受较大的压力,且滚动体端部压力远大于中部压力;滚动体承受的轴向压力与四列圆锥轴承的锥度分布一致,最大应力出现在第一列滚动体靠近辊身侧的位置;各个滚动体的接触宽度与滚动体上承受的径向载荷分布规律一致,非轴承接触面所受载荷的分布与承受载荷的滚动体的位置相对应。Due to the strong non-linearity of roll bearing contact problem, the Boundary Element Method(BEM)is used to study the roll bearing contact problem. Bearing boundary elements are used to simulated the bearing contact elements, and the Hertz contact theory is used to revise the contact widths of rollers with inner race and outer race in the bearing BEM. According to the assemble and fit characteristics of mill conical roller bearings,both loose fits are adopted to the inner race with the roll and the outer race with the block, the program of bearing BEM for the four-bodies elastic contact with friction is compiled, with which a mill four-row conical roller bearing is simulated. According to the results, the small ends of the conical rollers bear the larger pressure and the pressure on the ends is lager by far than the pressure on the middle. The direction of axial pressure on the rollers is consistent with the conicity of the rollers and the maximum pressure occurs in the mill roll side on the first-row rollers. The distribution law of the contact widths of the rollers is consistent with the radial load on the rollers and the radial pressure distribution on non-bearing contact area corresponds to the location of the rollers bearing load.The numerical example illustrates the viability and accuracy of the algorithm.

关 键 词：轴承边界元法 轴承边界单元 赫兹接触理论 轧机圆锥滚子轴承 

分 类 号：TH133.3[机械工程—机械制造及自动化]