滑动轴承的压力分布与功耗数值计算

A Numerical Simulation of Pressure Distribution and Power Dissipation on Journal Bearing

以Reynolds方程为基础,对径向滑动轴承的液体动压力润滑产生的油膜进行压力分布和功率损耗计算分析。从数值上理论推导出无量纲的二维Reynolds方程,并给出Reynolds边界条件;利用有限差分法对二维Reynolds方程进行离散推出其迭代形式,并利用超松弛迭代法求解;以工程实例计算滑动轴承油膜压力分布和功率损耗,并分析了偏心率、宽径比对轴承润滑性能的影响。该方法流程可用于工程中滑动轴承的压力分布和功率损耗计算,有利于设计人员的设计选型。

Based on Reynolds equation,the pressure distribution and power dissipation of journal bearing are analyzed,produced by the hydrodynamic lubrication.A dimensionless and two-dimensional Reynolds equation and its boundary conditions are given.With the finite difference method,the two-dimensional Reynolds equation is transferred to an iteration form,which is solved using the successive overrelaxation(SOR)method.An example is given to verify the numerical method.The influences of malalignemnt and width-diameter ratio on the lubricating property are analyzed.This numerical method and process is available to the calculation of journal bearing s pressure distribution and power dissipation in mechanical engineering.It can help engineers design and select the journal bearing.