Analysis of Traction Motor Flow Characteristics based on Fluid-Structure Interaction
In order to study the internal condition of the motor axial ventilation cooling system,a large mine electric wheel traction motor is taken as an example to study the axial ventilation cooling and heat transfer in this paper.On the basis of hydromechanics and heat transfer theory,combined with the axial ventilation performance and structural characteristics of the motor,the finite element model of three-dimensional flow and heat transfer coupling solution of the motor is established.The basic assumptions and corresponding boundary conditions are given.By calculating the electromagnetic field and temperature field inside the motor,the finite volume method is used to couple the governing equations of three-dimensional fluid field and temperature field,and it is not necessary to assume the boundary conditions of heat transfer coefficient between models,so more accurate temperature rise and cooling results can be obtained.On this basis,through the fluid-solid coupling calculation of the motor,the influence of flow distribution on ventilation and cooling effect is studied,and then the influence of different flow rates,stator flow channels and flow channel widths on the temperature field and flow resistance of the motor is analyzed on the original model,and the optimized flow channel is provided to effectively reduce the hottest temperature area of the motor.The accuracy of simulation calculation is verified by monitoring the temperature field and cooling resistance of the motor in real operation.The fluid-solid interaction analysis method is helpful to the optimal design of the heat dissipation of the motor and provides a theoretical basis for the accurate calculation of the comprehensive physical field of the motor with higher power.
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