真空管道内直线电机定子温度分布与散热特性研究  

Study on Temperature Distribution and Heat Dissipation Characteristics of Stator of the Linear Motor in Vacuum Tube

作　　者：陈文庆 毕海权[1] 周远龙 Chen Wenqing;Bi Haiquan;Zhou Yuanlong(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031)

机构地区：[1]西南交通大学机械工程学院,成都610031

出　　处：《制冷与空调（四川）》2024年第3期293-298,312,共7页Refrigeration and Air Conditioning

摘　　要：为研究真空管道内直线电机定子的温度分布和散热特性,建立了直线电机定子温度分布三维数值计算模型,利用Fluent软件模拟了定子在通电及散热阶段的温度场变化,研究了不同管道压力(0.005、0.01、0.02、0.05、0.1atm)对线圈表面自然对流换热性能的影响,分析了自然对流换热与辐射换热的相对强弱。研究结果表明,列车单次运行引起的定子温升很小,线圈最高温升为14.6℃,经两小时散热后温升仅为0.55℃;通电线圈产生的热量95%以上通过导热传递给铁芯和支架,而通过对流和辐射所传递的热量非常少,管道内压力对线圈表面的自然对流换热量有很大影响;线圈表面的辐射换热量大于自然对流换热量。研究结果为真空管道直线电机定子的温升特性及散热方法研究提供了理论依据。In order to study the temperature distribution and heat dissipation characteristics of stator of the linear motor in vacuum tube,this paper established a three-dimensional numerical calculation model of stator temperature distribution of linear motor,and simulated the temperature field changes of stator in the energizing and heat dissipation stages by Fluent software.The influence of different tube pressures(0.005,0.01,0.02,0.05,0.1 atm)on the natural convection heat transfer performance of coil surface was studied,and the relative strength of natural convection heat transfer and radiation heat transfer was analyzed.The results show that the temperature rise of the stator caused by a single train operation is small,the maximum temperature of the coil is 14.6°C,and the temperature rise is only 0.55°C after two hours of heat dissipation.More than 95%of the heat generated by the energized coil is transmitted to the iron core and bracket through heat conduction,while the heat transferred by convection and radiation is very small,and the pressure of the tube has a great effect on the natural convection heat exchange on the coil surface.The radiation heat transfer on the coil surface is greater than the natural convection heat transfer.The research results provide a theoretical basis for the research of temperature rise characteristics and heat dissipation methods of stator of the linear motor in vacuum tube.

关 键 词：真空管道 直线电机 温度场 散热特性 

分 类 号：U237[交通运输工程—道路与铁道工程] TM37[电气工程—电机]