考虑渐进变形和润滑剂的滚动轴承外圈单点故障动力学模型  

Dynamic Model of Rolling Bearing with Single Point Fault in Outer Ring Considering Progressive Deformation and Lubricant

作　　者：李云龙 李志农[1,2] 陶俊勇[4] 许贝 LI Yunlong;LI Zhinong;TAO Junyong;XU Bei(Nanchang Hangkong University,Nanchang 330063,China;Key Laboratory of Nondestructive Testing,Ministry of Education,Nanchang 330063,China;School of Mechanical Engineering,Guangxi University,Nanning 530004,China;Laboratory of Science and Technology on Integrated Logistics Support,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]南昌航空大学,南昌330063 [2]无损检测技术教育部重点实验室,南昌330063 [3]广西大学机械工程学院,南宁530004 [4]国防科学技术大学装备综合保障技术重点实验室,长沙410073

出　　处：《轴承》2021年第9期14-19,28,共7页Bearing

基　　金：国家自然科学基金项目(52075236);机械系统与振动国家重点实验室课题项目(MSV201914);装备预研基金项目(6142003190210)。

摘　　要：针对传统滚动轴承模型将外圈局部损伤视为矩形缺口,滚动体与损伤接触瞬间产生变形且变形量恒等于故障高度的问题,将故障视为圆弧形缺口,接触变形量随滚动体进入故障内的程度而变化,并在考虑润滑剂影响的基础上建立了外圈单点故障的滚动轴承动力学渐进模型。以SKF6205轴承为例进行仿真分析,结果表明,外圈单点故障滚动轴承振动信号中的低频段为故障的特征频率及其倍频,渐进模型的幅值更大,能够更好地反映故障信息。另外,所提出模型的分析结果与西储大学轴承试验数据之间的误差不大于0.82%,证明了模型的正确性。Aimed at the problems that the local damage of outer ring is regarded as a rectangular notch in traditional model of rolling bearing,the deformation instantly occurs at the moment when the rolling element contacts with damage,and the deformation amount is equal to fault height,the fault is regarded as a circular notch,and the contact deformation amount changes with the extent to which the rolling element enters fault.Considering the influence of lubricant,a dynamic progressive model of rolling bearing with single point fault in outer ring is established.Taking SKF6205 bearing as an example for simulation analysis,the results show that the low frequency band of vibration signal of rolling bearing with single point fault in outer ring is fault characteristic frequency and its frequency doubling.The amplitude of progressive model is larger,which can better reflect fault information.In addition,the error between analysis results of proposed model and bearing test data from Western Reserve University is no more than 0.82%,the correctness of model is proved.

关 键 词：滚动轴承 动力学模型 外圈 故障 润滑剂 接触 弹性变形 

分 类 号：TH133.33[机械工程—机械制造及自动化] O313[理学—一般力学与力学基础]