Influence of Structural Parameters of Stator oil Injection Ring on Heat Dissipation of Motor
Numerical simulation and Pareto Optimality were used to investigate the effects of the number and aperture of oil injection holes on the flow characteristics and the temperature distribution in the stator.The results show that when the number of injection holes increases from 8 to 30,the inlet and outlet pressure drop decreases by 80%,the average turbulence degree increases by 160%,the average stator core temperature decreases by 15%,and the average winding temperature decreases by 16%.When the aperture is reduced from 2 mm to 1.3 mm,the pressure drop at the inlet and outlet inscreses by 57.1%,the average turbulence is increased by 39.9%,the average stator core temperature is reduced by 1.5%,and the average winding temperature is reduced by 2.2%.The optimization analysis shows that the structural parameters of stator oil injection ring with the optimal heat dissipation effect are as follows:the number of oil injection holes is between 20 and 30,and the aperture size is between 1.45 mm and 1.6 mm.The research results provide a theoretical basis for the heat dissipation of oil-cooled motors.