考虑紊流效应和温黏关系的滑动轴承故障分析

Fault Analysis of Journal Bearings Considering Turbulent and Thermo-hydrodynamic Effects

为了研究气轮发电机组滑动轴承发生的轴瓦破裂、碰磨故障的原因,从考虑轴承润滑问题的紊流效应和温黏关系出发,采用有限元法求解了广义Reynolds方程、能量方程和热传导方程,得到额定负载下的油膜压力、温度和厚度分布,从而解释了所研究轴承的故障现象,即轴瓦破裂位置出现在最小油膜厚度位置的下游。

In order to investigate the cause of the typical bush rupture and wear damages in the journal bearing of the steam turbine generator set .The generalized Reynolds equation ,energy equation and heat conduction equations are simultaneously solved with the finite element method considering the lubrication turbulence and thermo-hydrodynamic effects .The pressure ,temperature ,thickness distribution of the oil film are obtained .It explains the bearing failure phenomena studied in this paper that the position of bearing rupture is downstream of the minimum film thickness position .