载荷约束下滚子误差对轴承运动精度的影响

Effect of Roller Error on Movement Accuracy of Bearing Under the Load Restriction

根据Hertz弹性接触理论和线接触载荷-变形协调关系,在分析圆柱滚子轴承零件的几何运动关系的基础上,建立载荷约束下滚子直径尺寸误差与轴承运动精度关系的数学模型。以某型号的圆柱滚子轴承为研究对象,对轴承的运动状态进行数值仿真,研究载荷约束下滚子直径尺寸误差对轴承运动精度的影响。研究结果表明:随着轴承径向载荷的增大,内圈径向跳动量呈逐渐减小的趋势,且逐渐趋于平缓;多个滚子存在尺寸误差时,内圈径向跳动量的大小与误差滚子的排布方式有关。

According to theory of Hertz elastic contact and line contact load-deformation coordination,the mathematical model of the relationship between the roller diameter error and the kinematics accuracy of the bearing under the load constraint is established,and based on the analysis of the geometric motions relationship of the bearing parts,a certain type of cylindrical roller bearing is used as research object to make numerical simulation of motion state of bearing,researching the effects of the roller size error on the movement precision of bearing under the load constraint. The results show that with bear radial load increasing,the radial run-out value of inner ring tends to decrease and goes to be smooth;when there are a multiple of rollers errors,inner ring radial run-out value is related to the way of error roller arrangement.