偏歪斜滚子摩擦副的接触应力分析及凸度设计  

Contact Stress Analysis and Crowning Design of Friction Pair with Rollers Under Misalignment and Skewing Conditions

作　　者：陈晓阳[1] 周越[1] 沈雪瑾[1] 王志坚[1] 张小玲 马纯青 

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]苏州轴承厂有限公司,江苏苏州215000 [3]上海和锦滚子科技有限公司,上海201611

出　　处：《华南理工大学学报（自然科学版）》2015年第6期77-83,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：工信部"十二五"规划项目(D50-0109-12-001);上海市教委重点创新项目(11ZZ89)~~

摘　　要：根据静弹性接触理论,建立滚子与滚道同时存在偏斜和歪斜工况下的力学模型,并利用快速傅里叶变换(FFT)求解其弹性变形,用共轭梯度法求解接触应力.通过分析各种工况参数对接触应力分布的影响发现:歪斜角一定时,随着偏斜角的增大,"偏斜效应"和"边缘效应"均变得更加明显;偏斜角一定时,"歪斜效应"随着歪斜角的增大而逐渐明显,且偏斜角能减弱滚子与内滚道接触产生的"边缘效应",滚子则与外滚道接触产生更加严重的"偏斜效应"和"歪斜效应";随着滚子长径比的增加,滚子与滚道接触副产生的"偏斜效应"和"歪斜效应"逐渐明显.最后通过改变滚子凸度提出了一种综合考虑滚子偏、歪斜工况的凸度设计方法,以提高滚子轴承的抗偏、歪斜能力.Based on the static elastic-contact theory, a model to describe the mechanical contact between the roller and the race is established under misalignment and skewing conditions, and the fast Fourier transform （FFT） and the conjugate gradient method are employed to obtain the elastic deformation and the contact stress, respectively. Then, the influences of different parameters on the contact stress distribution are analyzed. The results show that （1） at a constant skewing angle, both the misaligned load effect and the edge effect remarkably improve with the increase of the misalignment angle; （2） at a constant misaligned angle, the skewing phenomenon becomes more obvious with the increase of the skewing angle, and the misalignment angle helps to weaken the edge effect caused by the contact between the roller and the inner race, while the misaligned load effect and the skewing phenomenon both become worse when the roller is contacted with the outer race ; and （3） with the increase of the length-to-dia- meter ratio, both the misaligned load effect and the skewing phenomenon become more obvious. In addition, a crowning design method considering both the misalignment and the skewing of the roller is presented to improve the anti-misalignment and anti-skewing ability of roller bearings.

关 键 词：滚子 摩擦副 偏斜 歪斜 接触应力 凸度设计 

分 类 号：TH133.33[机械工程—机械制造及自动化]