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构筑了有限宽圆轴承温粘热效应二维有限元模型。依据圆轴承温粘热效应的三维模型计算结果,油膜温度场变化沿轴向可以忽略,在轴瓦和轴颈与油膜界面使用绝热边界条件,用有限元方法联立求解周向和径向二维能量方程、双雷诺边界条件广义雷诺方程、周向速度方程和温粘方程,给出中心对称面上油膜温度和速度分布,轴承特性系数与工程上应用数据吻合。研究结果表明,不考虑轴瓦的导热使油膜力计算结果偏高,同时,将进油槽处温度作为油膜的始温又使油膜力的计算结果偏低,这一高一低相互抵消,证实该模型合理,符合工程应用。
A two-dimensional finite element model of temperature-dependent thermal effect of a finite wide circular bearing was constructed. According to the calculation results of the three-dimensional model, the change of the temperature field of the oil film can be ignored along the axial direction. The adiabatic boundary conditions are used at the interface between the bearing bush and the journal and the oil film, and the two-dimensional energy in the circumferential direction and the radial direction Equation, the generalized Reynolds equation of the double Reynolds boundary condition, the circumferential velocity equation and the temperature-viscosity equation, the temperature and velocity distribution of the oil film on the center symmetry plane are given, and the coefficients of the bearing characteristics are in good agreement with the engineering data. The results show that the calculated result of oil film force is not high considering the thermal conductivity of bearing bush, and the temperature of oil intake groove as the initial temperature of the oil film causes the calculation result of oil film force to be too low. Reasonable, in line with engineering applications.