动车组牵引电机通风系统仿真计算及结构优化  

Simulation calculation and structureoptimization of an EMU traction motor ventilation system

作　　者：关颖[1] 李一凡 李明海[1] Guan Ying;Li Yifan;Li Minghai(School of Locomotive and Vehicle Engineering,Dalian Jiaotong University,Liaoning Dalian,116028, China;CRCC Tangshan Co., Ltd., Hebei Tangshan, 064000, China)

机构地区：[1]大连交通大学机车车辆工程学院,辽宁大连116028 [2]中车唐山机车车辆有限公司,河北唐山064000

出　　处：《机械设计与制造工程》2022年第2期10-14,共5页Machine Design and Manufacturing Engineering

基　　金：辽宁省教育厅科学研究项目(05430202)。

摘　　要：以动车组牵引电机为研究对象,基于计算流体动力学理论,对牵引电机内部流场进行数值模拟分析,分析了各部分流场对电机内部温度场的影响,研究了空气流量、电机损耗、定转子通风孔流量配比等因素对温度场的影响。根据计算结果进行结构优化,降低电机的工作温度。最后引用熵产分析理论计算不同风量和结构下的熵产值,通过运用熵产理论验证各方案的散热性能,并与仿真计算结果对比,进一步验证仿真计算的可行性。计算结果表明:随流量增加,电机降温显著,同时温度降低的幅度越来越小;优化方案二的各部件温度最低,降温效果最显著,熵产值最小。Taking the traction motor as the research object,based on the computational fluid dynamics theory,the flow field inside the traction motor is numerically simulated and the influence of the flow field on the internal temperature field of the motor is analyzed.The influence of air flow,motor loss and flow ratio of ventilation hole on temperature field is studied.According to the calculation results,the optimized structure is proposed to reduce the working temperature of the motor.Finally,the entropy production theory is used to calculate the entropy output value of different winds and structures.The heat dissipation performance of each scheme is discussed at the angle of entropy production,and the simulation results are compared with each other,and the feasibility of simulation calculation is further verified.The calculation results show that with the increase of the flow,the temperature reduction of the motor is more significant.At the same time,with the increase of the flow,the temperature decreases by less and less.In the second scheme,the temperature in each part is the lowest,the cooling effect is the most significant,and the entropy output value is the smallest.

关 键 词：动车组 牵引电机 计算流体动力学 熵产分析 流动与传热 

分 类 号：U260.31[机械工程—车辆工程]