含局部缺陷的成对角接触球轴承接触载荷分析
Contact load analysis of the duplex angular contact ball bearings with local defects
许恩典 1徐腾飞 1杨利花 1李子航 1胡禧龙 1王浩泽1
作者信息
- 1. 西安交通大学机械结构强度与振动国家重点实验室,西安 710049;西安交通大学陕西省先进飞行器服役环境与控制重点实验室,西安 710049;西安交通大学航天航空学院,西安 710049
- 折叠
摘要
建立了外滚道含局部缺陷的成对角接触球轴承(DACBBs)准静态力学模型,并考虑了缺陷深度、周向宽度以及轴承的时变特性.在此基础上,对纯径向和联合载荷两种工况下局部缺陷的尺寸和位置对DACBBs内部接触载荷的影响进行了系统研究.结果表明:接触载荷对缺陷非常敏感,当左右列轴承分别或共同含局部缺陷时,轴承两列的载荷分布有较大差异.含缺陷的那列轴承载荷分布会产生局部突变现象,突变的幅值和宽度随缺陷尺寸的增大而增大,而不含缺陷的另一列轴承突变很小.另外,成对轴承应视为整体进行研究分析,不同安装方式下,缺陷产生的影响也有较大差异.当前研究对揭示DACBBs的失效机制、可靠性分析以及设计具有重要意义.
Abstract
A quasi-static mechanical model of the duplex angular contact ball bearings(DACBBs)with local defects on the outer raceway was established.The defect depth,circumferential extent and the time-varying characteristic of the bearing were considered.On this basis,the influences of the size and location of local defects on the internal contact load of DACBBs were systematically investigated under pure radial and combined loads.The results showed that the contact load was very sensitive to the local defect.When the left or the right row contained defect or both of them had defects,the load distribution of the two rows was quite different.The load distribution of the row with defect produced a local mutation,and the amplitude and width of the mutation increased with the increase in the defect size.However,the mutation of the other row without defects was very small.In addition,the DACBBs should be considered as a whole for research and analysis.Under different arrangements,the impact of defects was also quite different.The current study has important implications for revealing the failure mechanism,reliability analysis and design of DACBBs.
关键词
成对角接触球轴承(DACBBs)/局部缺陷/接触载荷分布/接触角分布/安装方式Key words
duplex angular contact ball bearings(DACBBs)/local defects/contact load distribution/contact angle distribution/configuration引用本文复制引用
基金项目
航空发动机及燃气轮机重大专项(J2019-Ⅳ-0021-0089)
国家自然科学基金(11872288)
出版年
2024
NETL
NSTL
万方数据