含局部缺陷的角接触球轴承时变位移激励及动力学建模  

Time-varying displacement excitation and dynamic modeling of local defects in angular contact ball bearings

作　　者：雷春丽[1] 宋瑞哲 樊高峰 刘凯 薛伟 李建华[1] LEI Chunli;SONG Ruizhe;FAN Gaofeng;LIU Kai;XUE Wei;LI Jianhua(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Yunnan Wenshan Aluminum Co.,Ltd.,Wenshan 663000,China)

机构地区：[1]兰州理工大学机电工程学院,兰州730050 [2]云南文山铝业有限公司,文山663000

出　　处：《北京航空航天大学学报》2025年第3期753-762,共10页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(51465035);甘肃省自然科学基金(20JR5RA466)。

摘　　要：角接触球轴承在长时间工作的情况下,会产生故障损伤从而影响系统正常运行。以外圈具有局部缺陷的角接触球轴承为研究对象,提出不同局部缺陷轮廓的判别方法,建立角接触球轴承局部缺陷时变位移激励广义表征模型,研究局部缺陷演化过程及其位移激励机理。在此基础上,考虑轴承缺陷引起的时变位移对动力学特性的影响,基于赫兹接触理论,建立角接触球轴承故障动力学模型,并通过实验验证了所建模型的正确性。分析结果表明:矩形局部缺陷最终会演化成梯形形态;不同缺陷形貌诱发的位移激励变化趋势是不同的;与局部缺陷的长度相比,宽度对位移激励的影响更大。研究结果对轴承优化设计和故障诊断提供了理论基础。Angular contact ball bearings will suffer from fault damage after working for a long time,thus affecting the normal operation of the system.In this paper,angular contact ball bearingswith local defects in the outer ring were taken as the research objects,and the discrimination methods of different local defect contours were proposed.A generalized representation model of time-varying displacement excitation of local defects in angular contact ball bearing was established,and the evolution process of local defects and its displacement excitation mechanism were studied.On this basis,the influence of time-varying displacement caused by bearing defects on dynamic characteristics was explored,and a fault dynamic model of angular contact ball bearings was established based on Hertz contact theory.The correctness of the model was verified by experiments.The results show that the rectangular local defects will eventually evolve into trapezoidal local defects.The changing trend of displacement excitation induced by different defect morphologies is different.Compared with the length of the local defect,the width has a greater influence on the displacement excitation.The research results provide a theoretical basis for bearing optimization design and fault diagnosis.

关 键 词：角接触球轴承 局部缺陷 时变位移激励 缺陷演变 动力学建模 

分 类 号：TH133.3[机械工程—机械制造及自动化]