存在点缺陷的深沟球轴承的动力学响应  

Dynamic response of deep groove ball bearing with point defects

作　　者：张根源[1] 周泓[2] 常宗瑜[3] 

机构地区：[1]浙江传媒学院电子信息学院,浙江杭州310018 [2]浙江大学仪器科学与工程学系,浙江杭州310027 [3]中国海洋大学工程学院,山东青岛266100

出　　处：《浙江大学学报（工学版）》2009年第8期1497-1500,共4页Journal of Zhejiang University：Engineering Science

基　　金：浙江省自然科学基金资助项目(Y1080379)

摘　　要：点缺陷对滚动轴承的使用寿命和整机性能有着显著的影响.基于单边接触模型和弹流润滑理论,分析了存在点缺陷的滚动轴承的响应特征.采用多体动力学方法建立了考虑点缺陷的滚动轴承动力学模型,对外圈存在点缺陷的滚动轴承的内圈、外圈和保持架等的动力学响应进行了模拟.分析了在滚动体通过缺陷的动力学过程中滚动体和外圈产生的冲击现象,发现频率响应中的峰值频率与外圈的特征频率相关,这与滚动轴承故障诊断结论相吻合.提出的滚动轴承动力学模型可以用于点缺陷故障特征的提取和滚动轴承的故障诊断.Point defects have significant effects on the life of rolling element bearings and the dynamic properties of whole machines. In order to analyze the response of rolling etement bearings considering point defects, unilateral contact model, elastohydrodynamic lubrication theory and multibody method were applied to develop a dynamic model of deep groove ball bearing. The dynamic responses of inner race, outrace and cage were simulated. The impact phenomena between race and rolling elements were analyzed in the process of balls passing through the point defect. The results show that the peak frequencies in frequency domain are relevant to the characteristic frequency, which agrees with the rules of fault diagnosis for rolling element bearing. This rolling element bearing model can be applied to fault feature extraction and fault diagnosis.

关 键 词：点缺陷 球轴承 故障诊断 单边接触模型 多体动力学 

分 类 号：TU411[建筑科学—岩土工程] TU472.5[建筑科学—土工工程]