紊流条件下滑动轴承动特性研究

Turbulent State Analysis of Hydrodynamic Bearing

提出了一种流体动压润滑轴承的计算模型采用以侧隙为准的雷诺数来表征整个流场的紊流影响效应．这种模型区别于曾被普遍采用的局部效应假设，具有理论上的完备性．还分析了影响动力特性计算精度的几个主要因素．指出在紊流状态下，动特性系数的迭代是正确计算轴承稳定极限转速值的关键．文中给出了在全尺寸滑动轴承试验台上的几个实例，以验证所提出的力学模型和计算方法的实际效果．

The paper presents a calculating model on liquid hydrodynamic bearingadopting Reynolds Numbers of side clearance as expressing turbulent lubricantion effect in all fluid field.This model distinguishes the part effect assumption that was adopted generally and has theoretical perfection.Some main factors that influence calculating precision of dynamic characteristics are analysed.At turbulent state,iteration of the dynamic coefficients is the key to correct calculating revolution values of stability limit of bearing.The paper also presents some realistic examples on allsize test rig of sliding bearing for verifying realistic effects of the model and calculating method.