关键词: 油冷电机, 有限元分析, 计算流体动力学

Abstract: The oil-cooled motor for aero uses internal hydraulic oil for cooling circle to improve the performance of heat dissipation and output efficiency.The state of oil in the motor is complicated. The computational fluid dynamics(CFD) model were built to investigate the detailed distribution and flow of oil by finite element analysis(FEA). The main objective was to investigate the influence of air gap height and inlet & outlet pressure difference to oil passing capacity of the air gap district between stator and rotor.The results show that oil passing capacity of the air gap district increases lowly as air gap height increases and is linear with inlet & outlet pressure difference.The detailed flow modeling by means of CFD allows precise determination of the cooling possibilities which gives to designer the information required for choosing the optimal volumetric coolant flow.

Key words: oil-cooled motor, finite element analysis(FEA), computational fluid dynamics(CFD)