摘要
牵引电机冷却水道内冷却液的流动与传热是冷却系统工作的核心环节。水道内壁面直接与冷却液接触发生热交换,使电机散发的热量以对流换热的形式通过壁面传递给冷却液并进入冷却环路。根据四种不同结构的牵引电机冷却水道结构特点,针对牵引电机冷却系统的流动与传热特性建立基于有限体积法冷却系统数值仿真模型,并建立冷却水道冷却效果评价模型,通过对不同结构冷却水道流动与传热的数值模拟,分析比较冷却水道的冷却效果。搭建牵引电机温升及效率特性试验平台,通过试验得到电机在各种工况和冷却条件下效率及温升的重要试验数据,为冷却系统的设计提供重要参考依据。同时,通过试验结果和仿真结果的对比研究,验证数值仿真的可靠性。可以看到,采用数值方法设计和研究牵引电机冷却系统充分体现了数值模拟的低成本、速度快和结果全面的优势,是今后设计和开发工作的重要方向和主要手段。
Coolingfluid flowand heat transfer in traction motor coolingchannel is the core of coolingsystemwork.The inner wall of the water channel is directly in contact with the cooling liquid to generate heat exchange,and the heat dissipated by the motor is transmitted to the cooling liquid through the wall surface in the form of convective heat transfer and enters the cooling loop.According to the structure characteristics of four kinds of traction motor cooling channels,this thesis proposed a numerical simulation model of the cooling system.Based on the finite volume method,the model was established for describing the flow and heat transfer characteristics of traction motor coolingsystem.Coolingeffectiveness evaluation model of the coolingchannels was set up.Cooling effect of different cooling channel structures were given by comparing and analyzing the numerical simulations of flow and heat transfer of different structures.The traction motor temperature-rise test platformwas established.The influence pattern of the cooling systemon the traction motor was given by experimental study.The reliability of the numerical simulation is verified by the comparison between the experimental results and the simulation results.It can be seen that the design and research of traction motor cooling system by numerical method fully embodies the advantages of low cost,fast speed and comprehensive result of numerical simulation,which is the important direction andmain means for future design and development work.
作者
王景妍
WANG Jing-yan(School of Transportation,Huanghe Science and Technology College,He’nan Zhengzhou 450064,China)
出处
《机械设计与制造》
北大核心
2018年第10期108-112,118,共6页
Machinery Design & Manufacture
基金
河南省自然科学基金(152300410229)
关键词
牵引电机
冷却水道
流动
传热
模型
试验
TractionMotor
Cooling System
Flow
Heat Transfer
Model
Test
