基于流固耦合的多级潜水泵叶轮结构强度分析

利用ANSYS的Workbench平台,通过单向流固耦合模型对叶轮的应力应变进行了数值研究.分别计算出叶轮受流体压力及离心力载荷作用所产生的最大等效应力及变形量,进一步获得2种载荷共同作用时的效果.在此基础上,研究了叶轮最大等效应力及变形量随流量的变化特征,并对叶轮进行结构强度校核.结果表明,叶轮最大等效应力及变形量主要受流体压力作用影响,而受离心力的影响较小.当流量逐渐增加,叶轮最大等效应力先增大后减小,叶轮变形量则逐渐减小.强度校核结果表明,叶轮符合强度要求.

Structural Strength Analysis of Multistage Submersible Pump Impeller Based on Fluid-structure Interaction

To accurately figure out the stress and the deformation of the impeller, the one-way fluid-structure interaction was performed, utilizing the ANSYS Workbench. The pressure of the fluid flow and the centrifugal force imposed on the impeller respectively were used to evaluate the maximum equivalent stress and deformation of the impeller. Then the effect of two loads jointly imposed on the impeller was obtained. Based on these procedures, the stress and deformation behavior under different flow rates were numerically investigated. And the structural strength of the impeller was also checked. The results showed that the maximum equivalent stress and the deformation were primarily determined by the fluid flow pressure, and were less affected by the centrifugal force. With increasing flow rate, the maximum equivalent stress increased gradually and then decreased, while the deformation gradually decreased. The strength check result showed that the impeller could meet the strength requirement.