【摘要】 在二维温度场模型基础上,建立了滑动轴承一维温度场计算模型。首先忽略周向速度中泊肃叶流项,实现了广义雷诺方程和油膜温度场控制方程的解耦;然后假定二维温度场径向是三次多项式函数,控制方程径向积分,利用油膜和轴颈、轴瓦接触面处热边界条件,获得了周向一维油膜温度场控制方程组和轴瓦内表面温度解析表达式。算例表明,轴瓦内表面温度值与实验数据吻合,运算时间仅为二维模型的千分之一,适用计及温黏效应下油膜润滑特性的工程分析。更多还原

【Abstract】 A simplified one-dimensional thermal model was built on the basis of the original two-dimensional thermal model.Firstly,the oil-temperature governing equation and the generalized Reynolds equation were uncoupled by assuming that the Poiseuille term of the circumferential velocity can be neglected.Then the temperature variation across the film was assumed to be represented by a cubic polynomial,including the thermal boundary conditions at fluid film-solid interfaces,a simplified form of one-dimensional film temperature system of governing equations was derived by integrating across the film thickness and the analysis formula of film-bush interface temperature was obtained.The calculated results are compared with experimental measurements.The overall agreement is satisfactory,and significant computing time is saved,only accounting for 0.1% of two-dimensional finite element method’s.It should prove useful in practical calculations of journal bearing thermal performance.更多还原