基于热固耦合的高温热水泵口环形变分析  

Analysis of ring deformation of hot-water pump based on thermo-solid coupling

作　　者：曹卫东[1] 王秀兰[1] 胡啟祥 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《排灌机械工程学报》2013年第10期841-845,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：江苏高校优势学科建设工程项目;江苏省企业博士集聚计划项目(2010001)

摘　　要：为避免高温热水泵在运行过程中出现转子部件咬合现象,对TEG 200-400型高温热水泵的口环间隙进行分析.利用ANSYS Workbench软件,对TEG 200-400型高温热水泵在不同温度下的热固耦合进行有限元分析,得到泵盖冷却水腔有无冷却冲洗以及不同温度条件下的泵口环的形变量.结果表明:冷却腔的冲洗对叶轮口环的位置形变影响较大,高温热水泵的使用过程中,尽量降低泵盖与托架连接处的温度,有利于减小叶轮口环的变形;泵体口环和叶轮口环形变量随介质温度的升高而增大,依据运行介质的温度、泵的自身结构、材料特征等,对热变形进行合理预估并选择设计口环间隙,可避免泵启动及运行时泵体口环与叶轮口环之间的动静摩擦;在250℃设计温度条件下,叶轮口环与泵体口环的半径间隙取为0.6 mm的方案是合理的.研究结果为合理选择叶轮口环和泵体口环之间的间隙提供了一定的依据.The rotor parts wear were usually caused during the hot-water pump running process. In order to improve the reliability and safety of the pump,based on the software ANSYS Workbench,the TEG200- 400 hot-water pump was analyzed with thermal-solid coupling at different temperatures. The ring deformations at different temperatures has been obtained,and the deformations were also analyzed with and without the cooling water chamber. The results can provide a certain basis for the choice of gap between the impeller ring and volute ring. The analysis shows that the flushing of the cooling water chamber affects the impeller ring deformation obviously,and during the running process of the hightemperature process pump,the temperature at the connection between pump cover and bracket should be decreased as much as possible to reduce the deformation of the impeller ring. The deformation of the volute ring and the impeller ring become greater as the media’s temperature increases. In order to avoid the friction between the volute ring and the impeller ring during the pump start and running process,the thermal deformation should be reasonably estimated,and the ring gap should be chosen for the design according to the temperature of the running medium,the pump structure,material characteristics,et al. If the radius gap between impeller ring and volute ring is larger than 0. 6 mm,the scheme is safe under the condition that media’s temperature is 250 ℃.

关 键 词：高温热水泵 形变 WORKBENCH 热固耦合 口环间隙 

分 类 号：TH[机械工程]