中型高压电机内风扇流体分析与温升计算  

Analysis of fluid field of the internal fan and calculation of temperature rise for medium-size high-voltage asynchronous motor

作　　者：温嘉斌[1] 刘艳翠[1] 姜天一 朱建良[1] 苏勇 WEN Jia-bin;LIU Yan-cui;JIANG Tian-yi;ZHU Jian-liang;SU Yong(School of Electrical&Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《电机与控制学报》2018年第4期33-41,共9页Electric Machines and Control

基　　金：国家自然科学基金(51275137);黑龙江省教育厅科学技术研究项目(12541137)

摘　　要：以一台YKK450-4、500kW的中型高压异步电动机为例,依据电机实际尺寸,建立内风扇物理模型,并分析了内风扇流体流动情况。对中高压型异步电机三维定转子径向通风沟和与之相邻的铁心段进行建模,通过有限体积法对模型进行求解。得到计算区域的流体流动情况、定转子通风沟内流体温升分布云图等。在不改变通风槽钢长度的情况下,将通风槽钢以近轴端底端为旋转中心旋转一定角度,重新建模计算电机温升。再将通风槽钢的形状改成自然的V型,重新建模分析计算,探究不同形状的通风槽钢会对通风沟内流体流动及传热产生怎样的影响。然后在两个通风槽钢中间位置加了一个五棱锥体,探究其流体流动情况。最后进行优化配合,找到改善电机散热的最好方案。A YKK450-4,500kW medium high voltage asynchronous motor is taken as an example to construct a physical model of inner fan according to the actual scale and the flow condition is analyzed.Then the model of the radial ducts of the motor′s stator and rotor and their adjacent iron cores were constructed.The finite volume method was applied to solve the problem model,and the fluid flow condition,the temperature rise distribution of the stator′s ducts in the calculated region were then obtained.Under the condition that the length of the ventilation channel steel remains unchanged,it rotated with the bottom end near the shaft end being the rotation center,to reconstruct the model to calculate temperature rise.Then the shape of the ventilation channel steel was changed to a natural V-shaped and the model was reconstructed,and it studied the influence of different shapes of the ventilation channel steel on the fluid flow and heat transfer.Furthermore,a pentagonal pyramid was added in the middle of two ventilation channel steels to study the fluid flow condition.Finally,optimization combination was conducted to find the best scheme for the thermal dissipating performance.

关 键 词：中型高压异步电动机 通风槽钢 流体场 温度场 优化设计 

分 类 号：TM301.4[电气工程—电机]