考虑尺寸效应的大型轴承疲劳寿命分析  

Analysis of Fatigue Life of Slewing Bearings Considering Size Effect

作　　者：罗忠[1,2,3] 杨曜嘉 郑思佳 周吉来 LUO Zhong;YANG Yao-jia;ZHENG Si-jia;ZHOU Ji-lai(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China;Key Laboratory of Vibration and Control of Aero-Propulsion System,Ministry of Education,Northeastern University,Shenyang 110819,China;Foshan Graduate Innovation School,Northeastern University,Foshan 528312,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]东北大学航空动力装备振动及控制教育部重点实验室,辽宁沈阳110819 [3]东北大学佛山研究生创新学院,广东佛山528312

出　　处：《东北大学学报(自然科学版)》2024年第12期1751-1758,共8页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(12272089,U1908217);广东省基础与应用基础研究基金重点项目(2020B1515120015)。

摘　　要：针对大型轴承疲劳寿命分析过程中尺寸效应的问题,对大型轴承进行疲劳寿命分析并深入研究了尺寸效应所产生的影响规律.通过建立接触载荷计算模型,确定接触力分布情况,结合Lundberg-Palmgren理论,计算出不同尺寸下大型轴承的疲劳寿命,分析得到了滚珠个数与直径耦合关系以及滚道中心圆直径等参数对大型轴承疲劳寿命的影响并讨论了大型轴承在疲劳寿命方面的尺寸效应,为大型轴承的设计与选用提供了参考.研究结果表明:减小沟曲率系数、增大接触角和滚道中心圆直径可延长大型轴承的使用寿命,滚珠直径的变化对大型轴承寿命的影响要大于滚道中心圆直径变化对其寿命的影响,且接触角的增大会增强尺寸效应,而沟曲率系数的增大则会削弱这一效应.Aiming at the problem of size effect in the process of fatigue life analysis of slewing bearings,the fatigue life analysis of slewing bearings is carried out and the influencing law of size effect is studied in depth.By establishing the contact load calculation model and determining the contact force distribution,combined with the Lundberg-Palmgren theory,the fatigue life of slewing bearings with different sizes is calculated.The coupling relationship between ball number and diameter,the influence of raceway center circle diameter and other parameters on the fatigue life of slewing bearings are analyzed,and the size effect of slewing bearings on the fatigue life is discussed,which provides reference for the design and selection of slewing bearings.The results show that reducing the groove curvature coefficient,increasing the contact angle and the raceway center circle diameter can increase the service life of slewing bearings.The influence of ball diameter change on the service life of slewing bearings is greater than that of the change of the raceway center circle diameter,and the increase of contact angle will enhance the size effect,while the increase of groove curvature coefficient will weaken the effect.

关 键 词：大型轴承 尺寸效应 疲劳寿命 接触载荷 模型建立 

分 类 号：TH133.3[机械工程—机械制造及自动化]