摘要
圆柱滚子在加工过程中会存在误差,安装时内、外圈采用过盈配合会导致内圈膨胀和外圈缩小,结合厚壁圆筒理论,建立了考虑滚子直径误差和内、外圈安装过盈量条件下滚子与滚道接触应力及内圈中心运动轨迹计算模型,通过数值计算实现了对每个滚子受力的精确计算。以NU306E圆柱滚子轴承为例进行分析,结果表明:不考虑安装变形且单个滚子存在直径误差时,内圈中心运动轨迹范围增大,单个滚子直径误差为负时误差滚子接触应力减小,相邻滚子接触应力增大,为正时误差滚子接触应力增大,相邻滚子接触应力减小;考虑安装变形且单个滚子存在直径误差时,各滚子的接触应力均减小,承载区增大,内圈中心运动轨迹减小;考虑安装变形且各滚子直径均存在随机误差时,各滚子的接触应力与其承载区域大小各不相同,内圈中心运动轨迹范围显著增大。
The roller of cylindrical roller bearing has error during machining,the interference fit of inner and outer rings during mounting results in expansion of inner ring and contraction of outer ring.Combined with thick-walled cylinder theory,a model is established,which is used to calculate contact stress between roller and raceway and motion track of inner ring center with considering roller diameter error and mounting interference of inner and outer rings,thus the force of each roller is calculated accurately by numerical calculation.Taking NU306E cylindrical roller bearing as an example,the analysis results show that the range of motion track of inner ring center increases when the mounting deformation is not considered and the diameter error of a single roller exists,the contact stress of error roller decreases and contact stress of adjacent rollers increase when the roller diameter error is negative,while the contact stress of error roller increases and contact stress of adjacent rollers decrease when the roller diameter error is positive.The contact stress of each roller decreases,the loading zone of bearing increases,and the motion track of inner ring center decreases when the mounting deformation is considered and the diameter error of a single roller exists.The contact stress of each roller and the loading zone is different,and the range of motion track of inner ring center increases significantly when the mounting deformation is considered and the random error of each roller diameter exists.
作者
粟爽格
安琦
SU Shuangge;AN Qi(School of Mechanical and Power Engineering, East China University of Science and Technology,Shanghai 200237,China)
出处
《轴承》
北大核心
2020年第8期1-7,27,共8页
Bearing
关键词
滚动轴承
圆柱滚子轴承
滚子
直径误差
装配
变形
接触应力
rolling bearing
cylindrical roller bearing
roller
diameter error
mounting
deformation
contact stress
