摘要
为详细地分析具有局部缺陷的角接触球轴承(ACBBs)的运行状态,针对传统模型未考虑轴承润滑及缺陷引起的冲击力问题,建立ACBBs在弹流润滑(EHL)条件下考虑冲击力的局部缺陷ACBBs动力学模型。建立考虑自旋的缺陷轴承弹流润滑模型,计算出缺陷轴承的油膜厚度及油膜刚度,再提出ACBBs局部缺陷时变位移激励模型和时变刚度模型,在此基础上建立与缺陷尺寸及轴承转速有关的瞬时冲击力函数;基于Hertz接触理论和冲击力函数,提出外圈具有局部缺陷ACBBs动力学计算方法;研究具有故障的角接触球轴承振动特性,并通过实验验证,分析了不同参数对轴承动力学响应的影响规律。计算结果表明:轴承在润滑条件下,冲击力对轴承的振动影响明显减弱;随着缺陷尺寸和载荷的增大,轴承故障特征的频率均不变,但其幅值增大;随着轴承转速的增大,轴承故障特征频率及其幅值均增大,为滚动轴承的故障诊断和维护提供了有力依据。
In order to precisely analyze the operating status of angular contact ball bearings(ACBBs)with local defects and response to the impact force caused by bearing lubrication and defects in the traditional model,a dynamic model of ACBBs with local defects considering impact force under elastohydrodynamic lubrication(EHL)conditions was proposed.Firstly,an EHL model for defective bearings considering spin was established,and the oil film thickness and oil film stiffness of the defective bearings were calculated.Time-varying displacement excitation model and time-varying stiffness model for local defects in ACBBs were presented.On this basis,an instantaneous impact force function related to defect size and bearing speed was established.Secondly,based on Hertz contact theory and impact force function,a dynamic calculation method for ACBBs with local defects on the outer ring was proposed.Finally,the vibration characteristics of ball bearings with faults were investigated,and the influence of different parameters on the dynamic response of the bearings was analyzed through experiments.The calculation results show that under lubrication conditions,the impact force on the vibration of the bearing is significantly weakened.With the increase in defect size and load,the frequency of bearing fault characteristics remains unchanged,but its amplitude increases.As the bearing speed increases,the characteristic frequency and amplitude of bearing faults increase,providing a powerful basis for fault diagnosis and maintenance of rolling bearings.
作者
雷春丽
薛伟
樊高峰
宋瑞哲
刘凯
LEI Chunli;XUE Wei;FAN Gaofeng;SONG Ruizhe;LIU Kai(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Yunnan Wenshan Aluminum Co.,Ltd.,Wenshan 663000,China)
出处
《北京航空航天大学学报》
北大核心
2025年第6期1965-1977,共13页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家自然科学基金(51465035)。
关键词
角接触球轴承
局部缺陷
瞬时冲击力
弹流润滑
时变位移
动力学建模
angular contact ball bearings
local defect
instantaneous impact force
elastohydrodynamic lubrication
time-varying displacement
dynamic modellin
作者简介
通信作者:薛伟.E-mail:2542908749@qq.com。
