高速球轴承热稳定性研究  

The thermal stability of high-speed ball bearings

作　　者：丁洪福[1] 王风涛[1] 景敏卿[1] 李友胜[2] 王永 

机构地区：[1]西安交通大学机械工程学院,西安710049 [2]宝鸡文理学院机电工程系,陕西宝鸡721016 [3]河南新太行电源有限公司,河南新乡453000

出　　处：《振动与冲击》2017年第14期168-173,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51475357)

摘　　要：基于球轴承拟静力学模型,考虑润滑油流变特性、热源和结构尺寸随温度的时变特性。利用热网格法建立了高速球轴承瞬态热计算模型,通过求解热平衡方程得到轴承瞬态变化特性,研究了工况参数对轴承生热量、温度和热诱导载荷的影响规律,为高速球轴承润滑参数选取、结构优化、热失效机理和故障分析提供了理论依据。结果表明:内圈转速和轴向载荷的变化均对轴承的热平衡温度和热诱导载荷有显著影响;适当降低润滑油的黏度、增大空气的对流系数有利于减小轴承热诱导载荷;预测结果和文献测试结果吻合较好。Based on the quasi static model of ball bearings, the variation of oil viscosity, heat source and bearing structure sizes with the change of temperature were considered, and then a high-speed ball bearing thermal calculation model was established. The transient thermal characteristics of high-speed ball bearings were obtained by solving the thermal equilibrium equations. Then, the effects of different parameters on the heat generation, temperature and thermally-induced load of ball bearings were studied, which may provide a theoretical basis for the lubrication parameters selection, structure optimization, thermal failure mechanism analysis and faults analysis of high-speed ball bearings. The results show the inner ring speed and axial load have obvious influences on the thermal equilibrium temperature and thermally-induced load and the thermally-induced load can be decreased by using lower viscosity oils and increasing the convection coefficient of air. The predicted theoretical results are in good agreement with the experimental results.

关 键 词：高速球轴承 热网格法 瞬态热分析 热诱导载荷 

分 类 号：TH133.2[机械工程—机械制造及自动化]