摘要
为了解决大型矿用永磁外转子提升机损耗大、温升高和散热能力不足的问题,以大型矿用永磁外转子提升机JKN-3x2.2p为例,对其温度场和流场进行了仿真分析,通过改进优化提升机内部结构来降低其最高温度,并研究了风速与风道对提升机温度的影响。首先,建立了双风道流动与传热耦合三维模型,根据基本假设与边界条件,使用有限元法得到了提升机热源部分的损耗,并将其转化成生热率,对提升机温度场进行了仿真计算;然后,在定子端部设计通风槽钢来降低绕组最高温度,并对提升机定子通风孔数量进行了优化,对比了优化前后整体温度变化,分析了不同风速与风道对提升机温度场的影响;最后,为保证提升机内部气流均匀分布,对其冷却流场进行了模拟仿真;为了验证流-固耦合仿真计算方法的准确性,进行了提升机温升实验,并对比分析了仿真计算结果和实验结果。研究结果表明:安装通风槽钢使绕组最高温度降低了约7℃,永磁体最高温度下降了约5℃;选择定子通风孔数量85以及双风道、入口风速为24 m/s时散热效果更好。该研究结论揭示了定子结构改进对提升机温度场的影响,得到了冷却效果最佳方案,可为矿用永磁外转子提升机的冷却系统优化设计提供参考。
In order to solve the problems of large-scale mine permanent magnet external rotor hoist,such as large loss,temperature rise and insufficient heat dissipation capacity,taking large-scale mine permanent magnet external rotor hoist JKN-3x2.2p as an example,the temperature field and flow field were simulated and analyzed,and the highest temperature was reduced by improving and optimizing the internal structure of the hoist,and the effects of wind speed and air duct on the temperature of the hoist were studied.Firstly,a three-dimensional model of the coupling of flow and heat transfer in dual duct was established.According to the basic assumptions and boundary conditions,the loss of heat source was obtained by finite element method and converted into heat generation rate,and the temperature field of the elevator was simulated.Then,ventilation channel steel was designed in the stator end to reduce the maximum winding temperature,and the number of stator ventilation holes was optimized to compare the overall temperature change before and after optimization.The influence of different wind speed and duct on the temperature field of the hoist was analyzed.Finally,in order to ensure the uniform distribution of air flow inside the elevator,the cooling flow field was simulated.In order to verify the accuracy of the fluid-solid coupling simulation calculation method,the temperature rise experiment was carried out.And the simulation results and experimental results were compared and analyzed.The research results show that the installation of ventilation channel can reduce the maximum temperature of winding by about 7℃,the maximum temperature of permanent magnet by about 5℃,and the cooling effect is better when the number of stator ventilation holes is 85,the double air duct and the inlet wind speed is 24 m/s.The research results reveal the influence of stator structure improvement on the temperature field of the hoist,and obtain the best cooling scheme.It provides a reference for the optimization design of the cooling system of the mine permanent magnet external rotor hoist.
作者
刘鹏宇
吴娟
寇少凯
LIU Pengyu;WU Juan;KOU Shaokai(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Mine Fluid Control Engineering Laboratory,Taiyuan University of Technology,Taiyuan 030024,China;National-local Joint Engineering Laboratory of Mining Fluid Control,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《机电工程》
北大核心
2025年第8期1606-1614,共9页
Journal of Mechanical & Electrical Engineering
基金
山西省科技创新领军人才团队项目(202204051002003)。
关键词
起重机械
双风道
温度场和流场分析
气流均匀
通风槽钢
通风孔数量
hoisting machinery
double air duct
temperature field and flow field analysis
uniform air flow
ventilation channel
number of ventilation holes
