【摘要】 研究了油膜热效应对滑动轴承非线性动力学特性的影响 ,给出了考虑油膜热效应的滑动轴承非线性油膜力的计算方法 .用热量平衡法确定油膜平均温度 ,并把平均温度引入等温情况下的轴承非线性运动瞬态分析中 .以实际轴承为例 ,对考虑热效应的转子 轴承系统的非线性不平衡响应进行了瞬态分析 ,得到了轴心运动轨迹 ,并与等温情况瞬态分析的计算结果进行了对比 .通过一系列对比研究发现 ,轴承热效应对轴承的非线性动力学性能有重要影响 ,引入平均温度后可以减小不考虑热效应所引起的误差 .更多还原

【Abstract】 The influence of lubricant thermal effect on the bearing dynamics is studied. A method for calculating the nonlinear oil film forces condidering the thermal effects is proposed. The mean temperature of lubricant calculated according to thermal balance is adopted in transient analysis of the rotor. Thinking a two lobe bearing for example, through a transient analysis of the journal bearings with thermal effects, the journal center’s orbits are evaluated, and are compared with those obtained without thermal effects. Comparison shows that influence of the thermal effects on the dynamic performance of the bearing are important. Considering the mean temperature of lubricant can improve the accuracy of transient analysis.更多还原