双吸离心泵输送低温热水的温度分布及变形数值分析

Numerical Study of Temperature Distribution and Deformation of Double Suction Centrifugal Pump Transporting Low Temperature Hot Water

基于ANSYS Workbench有限元分析软件,以某中开面支撑的双吸离心泵为研究对象,建立热-固顺序耦合模型对热载荷作用下的泵壳温度与变形分布进行三维仿真研究。计算结果表明,壳体外壁主体区域温度接近流体介质温度,中开面附近温度较低且温度梯度较大;中开面和轴承安放面出现了不规则的位移,其中竖直方向的抬高效应可能破坏转子部件的对中性。研究为选用常温清水泵输送低温热水及结构和安装工艺的改变提供了参考。

Based on the ANSYS Workbench finite element analysis software, with a double suction centrifugal pump supported by some split casing to be the research object, hot-solid order coupling model established, a study is carried on with 3D simulation of pump shell temperature and deformation distribution under the action of the thermal load. The results show that the shell outside wall body area temperature is close to fluid temperature, the temperature near split casing is low and the temperature gradient is large in a degree; the split casing and the placed surface of the bearing appear irregular displacement and the elevation effect of vertical direction could undermine the rotor to neutral. The research of this paper is helpful to choose fresh water pump transporting low temperature hot water at room temperature and it also provides a certain reference for the changes of structure and installation process.