高速有质量偏心的轴承-转子系统瞬态热效应的研究

Study on the transient thermal responses of high speed rotor-bearing with mass unbalance

摘要: 对轴承油膜和轴瓦的三维瞬态温度场，使用改进Newton-Raphson算法求解雷诺方程和运动方程，编制仿真程序，对高速下有质量偏心的轴承-转子系统的瞬态热效应进行了研究。分别将考虑轴承瞬态三维温度场、瞬态二维绝热温度场得到的轴心运动轨迹和温度响应做了比较。结果表明，在高转速时温度变化对轴心轨迹的影响非常大，如果分析轴承转子系统的稳定性，必须同时考虑轴瓦和油膜的瞬态三维温度场。

Abstract: Considering the transient three-dimensional temperature field of the film and bearing bush, the transient thermal-responses of rotor-bearing system to mass unbalance are performed. The tracks and thermal-responses obtained by considering two-dimensional temperature are compared with the tracks obtained by considering three-dimensional temperature. The results show that the rise of temperature must be considered in the analysis of the stability of high-speed rotor-bearing system. The transient three-dimensional temperature must be considered when analyzing the stability of rotor-bearing.