防爆型水冷电机内换热与温度场计算  

Calculation on heat exchange and temperature field in water-cooled explosion-proof motor

作　　者：温嘉斌[1,2] 许明宇[1] 

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150040 [2]哈尔滨工业大学电气工程系,黑龙江哈尔滨150001

出　　处：《电机与控制学报》2009年第3期393-397,共5页Electric Machines and Control

基　　金：黑龙江省自然科学基金(E200626);国家科技支撑计划(2008BAF34B04)

摘　　要：采煤机电机安装空间严格受限,随着电机设计容量的提升,使单位体积损耗(发热率)增大。为了研究该类电机的发热与冷却问题,在对防爆型水冷电机的结构、材料以及换热机理进行分析的基础上,建立了防爆型水冷电机的传热数学物理模型。采用有限元法对电机定、转子及水套的温度场进行了计算与分析。通过计算结果与实测值对比,验证所建传热模型可以真实反映实际传热过程。分析计算结果表明电机定子最高温度点位于定子上层绕组近气隙侧;定子齿是热量传递的主要通道,热流密度最大;选用适当的冷却水流速,可以用最小的代价获取所需的冷却效果。研究结果可以为采煤机电机热控制和优化设计提供理论依据。The motor used in the shearer is installed in a limited space, with the increase of the design capacity, unit volume loss （heating rate） increases in it. In order to study the heating and cooling problems of the motor, heat transfer simulation model for water-cooled explosion-proof motor was established on the basis of analyzing its structure, materials, and heat exchange mechanism. Upon that the temperature field was calculated and analyzed in the stator, rotor and water jacket of the motor with finite element method. By comparing the experimental data and the calculated results, the model was verified. Calculation re- sults show that the highest temperature of stator is in the upper layer of the coil near the air gap, and the Stator teeth is the main channel of heat transfer, in which the heat flux density is maximum, and the appropriate flow velocity of the cooling water can obtain the required cooling effect with the minimum cost. The works provide a theoretical basis for the thermal control and optimal design of water-cooled motor used in the shearer.

关 键 词：防爆型水冷电动机 有限元 换热 温度场 

分 类 号：TM301.4[电气工程—电机]