基于CFD方法的液体动压滑动轴承动特性研究

Research on the Dynamic Characteristics of Hydrodynamical Journal Bearing Based on CFD Analysis

应用CFD工具Fluent建立了滑动轴承压力求解分析模型,计算分析了普通圆柱轴承的压力分布和上、下瓦开槽对滑动轴承压力分布、承载和进油量等因素的影响。比较了CFD方法和Reynold方程计算结果的差别。结果表明:CFD方法和Reynold方程计算结果基本相同,CFD方法可以直接求解N-S方程,可以更准确地反映轴承动特性。下瓦开槽对进油量的影响不大,但会提高承压区最大压力,从而提高轴承稳定性;上瓦开槽对油膜压力的影响不大,但会导致进油量增加,更好地冷却轴颈。

A pressure analytical model of journal bearings was established by CFD method.The pressure distribution of column journal bearings,the influences of grooving in upper pad and lower pad of bearings on pressure distribution,carrying capacity and oil-inputting of journal bearings were calculated and analyzed,and the calculation results were compared with that by Reynold equation.The results of two methods are almost same.CFD method can solve N-S equation directly and can display the dynamic characteristics of ...