高速球轴承的生热分析
Heating analysis of the high speed ball bearing
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摘要: 在结合球轴承的拟静力学和生热分析的基础上, 对球轴承各热源分别进行生热计算, 得到了高速球轴承各个单元间的局部生热和轴承总生热, 分析了输入转速、载荷等多种参数对轴承各单元间的局部生热和总生热的影响, 结果显示球轴承的生热绝大部分来自球与内圈滚道的自旋生热, 并且转速、轴向载荷和内圈沟曲率系数对生热的影响最大.同时将球轴承作为一个整体用现有经验公式计算轴承生热, 其结果严重偏离台架功耗试验结果, 而从局部热源出发计算轴承总生热更为准确, 为轴承的三维温度场计算、润滑油油量选择等奠定了良好的基础.Abstract: Based on the thermal analysis and the quasi-static analysis,heating by different heat sources is calculated.The local heating between the units of the high speed ball bearing and the total heating are obtained.The influences of the rotational speed,the load and other parameters on the local heating and the total heating are analyzed.The results reveal that a great portion of the heating comes from the spin heating between the ball and the inner ring.Furthermore,the influences of the rotational speed,the axial load and the curvature coefficient of the inner ring on the heating are the greatest of all the parameters which have an effect on the heating.At the same time,the heating is also calculated from the integral bearing.It is found that the result departs from the fact.In comparison with the result by regarding the ball bearing as an integral unit,the result obtained by the local method is consistent with the practice.However,the total heating calculated from the local heat sources of the bearing is more accurate.It can help to investigate three dimensional thermal field of the ball bearing and to choose the lubricant quantity etc.
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Key words:
- aerospace propulsion system /
- high speed ball bearing /
- bearing heating /
- local method /
- integral method
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