摘要
屏蔽泵电机广泛应用于核电、化工等领域,近年来成为广泛关注的热点。内置换热器类型的屏蔽电机具有占地面积节省等优点,为了保证其热安全及经济运行,针对机壳及其内置换热器进行流动换热研究非常重要。将机壳、螺旋管、螺旋管内水路及水冷夹套中横置的近似“工”字型的螺旋外水路组成的换热系统作为研究对象,建立了三维物理模型,进行了网格独立性验证,然后根据计算流体动力学理论,采用有限体积法,对螺旋管内外的三维流动和传热进行研究。结果表明:螺旋管及螺旋槽道中均产生了具有强化换热作用的二次流;螺旋管内外水处于紊流态换热较强。为蔽电机内置换热器研究及设计提供参考。
The canned pump motor is widely used in the nuclear power,chemical and other industries,which has become a widely-concerned hot topic.The canned pump motor with built-in heat exchanger has the advantages of saving floor space,it is crucial to research the flow and heat transfer of the casing and its built-in heat exchanger to ensure their thermal safe and economic operation.This paper takes the heat exchange system consisting with the casing,spiral tubes,spiral inner water channel in the tubes and approximate horizontal"工"type of spiral outer water channel in the water-cooling jacket as a research object to establish a 3D physical model.It verifies the independence of grid,and then researches the 3D flow and heat transfer in and out of the spiral tubes by finite-volume method based on computational fluid dynamics theory.The results show that the secondary flows with the enhanced heat transfer effect generated both in the spiral tubes and spiral channels,and the heat transfer is strong when the waters inside and outside the spiral tube is in a turbulent flow state.This paper provides the reference for the research and design of the built-in heat exchanger of the canned pump motor.
作者
盛志伟
王景明
艾丽昆
董珊珊
路义萍
周世杰
袁衍杰
王增艳
Sheng Zhiwei;Wang Jingming;Ai Likun;Dong Shanshan;Lu Yiping;Zhou Shijie;Yuan Yanjie;Wang Zengyan(Harbin Electric Power Equipment Co.,Ltd.,Harbin 150060,China;School of Machnical Power Engineering,Harbin University of Science and Technology,Harbin 150080,China;School of Mechanical and Electronic Engineering,Qiqihar University,Qiqihar 161000,China)
出处
《防爆电机》
2025年第4期54-58,共5页
Explosion-proof Electric Machine
关键词
屏蔽电机
内置换热器
螺旋管
强化传热
入口雷诺数
Canned pump motor
built-in heat exchanger
spiral tube
heat transfer enhancement
inlet Reynolds number
