基于有限元的调心滚子轴承接触应力和疲劳寿命分析  

Analysis on Contact Stress and Fatigue Life of Self-Aligning Roller Bearings Based on Finite Element

作　　者：孙玉凤 刘兴亚[2] 张明[3] SUN Yuf eng;LIU Xingya;ZHANG Ming(School of Automotive Engineering,Huanghe Jiao tong University,Jiaozuo 454950,China;School of Mechanical Engineering,Zhengzhou Information Science and Technology Vocational College,Zhengzhou 450000 China;College of Mechanical Engineering,Henan University of Technology,Jiaozuo 454224,China)

机构地区：[1]黄河交通学院汽车工程学院,河南焦作454950 [2]郑州信息科技职业学院机械工程学院,郑州450000 [3]河南理工大学机械工程学院,河南焦作454224

出　　处：《轴承》2018年第6期43-46,共4页Bearing

摘　　要：建立调心滚子轴承接触有限元分析模型,计算其接触应力,研究游隙和接触角对应力分布的影响,分析轴承的疲劳寿命。结果表明:套圈滚道的最大接触应力在最下端滚子与滚道的接触面上,并沿套圈圆周方向逐渐减小;游隙为正的轴承最大接触应力随游隙的增大而增大,游隙为负的轴承最大接触应力随游隙的变化不稳定;轴承的疲劳点首先出现在最下端滚子与套圈的接触处,内圈的疲劳破坏程度远大于外圈,内圈首先产生疲劳失效;随着材料残余压应力的增大,调心滚子轴承的对数疲劳寿命呈近线性状增长,且残余应力深度越大寿命越长。The finite element analysis model of the contact is built for self-aligning roller bearings,and its contact stress is calculated. The influence of clearance and contact angle on stress distribution is researched,and the fatigue life of the bearings is analyzed. The results show that the maximum contact stress of ring raceway is existed on contact surface between bottom roller and raceway,and decreases along circumferential direction of ring. The maximum contact stress of the bearings with positive clearance is increased with the increase of clearance,and the maximum contact stress of the bearings with negative clearance is unstable with variation of clearance. The fatigue point of the bearings appear firstly at contact area between bottom roller and ring,the fatigue damage degree of inner ring is greater than that of outer ring,and the fatigue failure is generated primarily from inner outer. The logarithmic fatigue life of spherical roller bearings presents near-linear growth with the increase of residual compressive stress of material. The deeper the residual stress depth is,the longer the life is.

关 键 词：调心滚子轴承 接触应力 疲劳寿命 仿真 

分 类 号：TH133.332[机械工程—机械制造及自动化] TH132