考虑轴承游隙变化的高速列车牵引电机轴承疲劳寿命分析  

Fatigue life analysis of high-speed train traction motor bearing considering the change of bearing clearance

作　　者：耿民 徐涛 邱超军 赵波 王华巍 王喜莲[2] GENG Min;XU Tao;QIU Chaojun;ZHAO Bo;WANG Huawei;WANG Xilian(Motor Vehicle Maintenance Department,CRRC Tangshan Co.,Ltd.,Tangshan Hebei 063035,China;School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]中车唐山机车车辆有限公司动车检修部,河北唐山063035 [2]北京交通大学电气工程学院,北京100044

出　　处：《北京交通大学学报》2020年第2期136-142,共7页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金(51178026)。

摘　　要：高速列车牵引电机轴承的游隙在运行过程中不断变化,游隙变化造成电机转子偏心量波动,从而引起转子偏心磁拉力变化造成轴承载荷变化,导致轴承疲劳寿命下降,造成行车安全隐患.围绕高速列车牵引电机轴承游隙变化情况下的疲劳寿命进行分析,介绍了滚动轴承疲劳寿命计算理论的研究现状和两种常用的寿命计算模型,分析了高速列车牵引电机轴承受载荷情况,并搭建ANSYS接触仿真模型,考虑游隙变化带来的载荷变化和应力集中效应,提出了一种改进的疲劳寿命计算方法,对疲劳寿命进行更为精确的计算.编制改进疲劳寿命计算方法的Matlab程序,与经典L-P方法和ISO计算方法作对比,并搭建了以轴承游隙为输入参数的轴承疲劳寿命计算平台.The clearance of high-speed train traction motor bearing changes constantly in the operation process.The change of clearance causes the fluctuation of the eccentric magnetic pull of motor rotor,which leads to the decrease of bearing fatigue life and hidden danger of driving safety.In this paper,the relationship between clearance change and fatigue life of bearings of high-speed train traction motor is analyzed.First,the development history of fatigue life calculation theory of rolling bearings and two commonly used life models are introduced.Then,the load on bearings of high-speed train traction motor is analyzed and the ANSYS contact simulation model is built.Therefore,an improved fatigue life calculation method is proposed in this paper,it considers the load change and stress concentration effect caused by the change of clearance.Finally,the classical L-P method,ISO calculation method and the improved fatigue life calculation method proposed in this paper are compared in Matlab,and a bearing fatigue life calculation platform with bearing clearance as input parameter is built.

关 键 词：高速列车 滚子轴承 轴承游隙 载荷分布 疲劳寿命 仿真分析 

分 类 号：TH133.3[机械工程—机械制造及自动化]