联合载荷作用下精密角接触球轴承动态特性演变规律

王明凯; 闫柯; 马帅军; 洪军

doi:10.13224/j.cnki.jasp.20210016

联合载荷作用下精密角接触球轴承动态特性演变规律

doi: 10.13224/j.cnki.jasp.20210016

西安交通大学现代设计及转子轴承系统教育部重点实验室，西安 710049

基金项目: 国家自然科学基金（51875439）

详细信息

作者简介:
王明凯（1995-），男，博士生，研究方向为滚动轴承动力学分析。E-mail：mkwang@stu.xjtu.edu.cn

通讯作者:
闫柯（1984-），男，教授、博士生导师，博士，研究方向为轴承润滑及热分析。E-mail：yanke@mail.xjtu.edu.cn

中图分类号: V229+.2;TH133
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出版历程
- 收稿日期: 2021-01-13
- 刊出日期: 2022-06-28

Evolutionary regularity of dynamic characteristics for precision angular contact ball bearing under combined loads

Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System，Xi'an Jiaotong University，Xi'an 710049，China

摘要

摘要: 基于滚动体与套圈之间相互作用与相对位置关系，考虑离心力、陀螺力矩等非线性因素影响，建立了精密角接触球轴承五自由度拟静力学分析模型，并基于逐步搜索法原理对轴承刚度计算模型进行优化，揭示了复杂联合载荷作用下精密角接触球轴承动态特性的演变规律。研究表明：轴向载荷在一定程度上减小轴承内外圈接触角差值，削弱由于转速增大引起的刚度软化现象；力矩载荷与径向载荷单独作用时，均导致轴承接触角、接触力波动幅度增大，沿载荷作用方向轴承刚度增大，垂直于载荷作用方向刚度减小；联合载荷作用下，力矩载荷能够抑制径向载荷引起的轴承内部载荷波动，提高轴承承载能力与使用寿命。
- 角接触球轴承 /
- 五自由度模型 /
- 动态特性 /
- 联合载荷 /
- 轴承刚度
Abstract: Due to the inconformity of assembly stress and thermal expansion transfiguration in the internal components of shaft system，the precision angular contact ball bearing could be applied into the combined loads consisting of axial load，radial load，and torque，which affected both the dynamic characteristics of bearing and the service performance of precision shaft system.According to the relationship of interaction and relative position between the rolling element and bearing track，a five-degree-of-freedom quasi-static model considering the effects of centrifugal force，gyroscopic torque and other nonlinear factors was established，and the calculation model of bearing stiffness was improved by the principle of step-by-step search method.The evolutionary regularity of dynamic characteristics for precision angular contact ball bearings was investigated in combined loads.The results indicated that the axial load could decrease the difference between ball-inner raceway contact angle and ball-outer raceway contact angle，and suppress the stiffness softening caused by the increase of speed.When the torque and radial force were applied separately，the fluctuation range of contact angle and contact force increased，and the bearing stiffness along the direction of loads also increased，while the stiffness decreased perpendicularly to this direction.In the condition of combined loads，the torque would restrain the fluctuation of load distribution due to the radial load，and improve the loading capacity and service life of precision ball bearing.
- angular contact ball bearing /
- five-degree-of-freedom model /
- dynamic characteristics /
- combined loads /
- bearing stiffness

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