基于流固耦合的多级冲压泵转子部件强度和模态分析

为保证冲压泵的运行稳定性和安全性,采用单向流固耦合方法,计算并分析了某型号多级冲压泵的转子部件在各种工况下的等效应力、变形量分布及模态。对泵内部三维湍流流场进行定常计算,获得泵内的流动参数分布;进而将流动载荷施加到泵的过流部件表面,采用有限元分析方法对泵叶轮进行强度校核,并对整个转子部件进行模态分析。研究发现叶轮上的最大等效应力出现在轮毂处,最大变形量则出现在叶片外缘处,且最大等效应力和最大变形量随级数的增加而减小;随着流量的增大,叶轮所受的最大等效应力逐渐减小,但最大变形量却逐渐增加。研究成果可为冲压泵的优化设计提供参考。

Analysis of Strength and Mode of Rotor of Multi-stage Stamping Pump Based on Fluid-solid Coupling

To ensure the stability and safety of the stamping pump, the equivalent stress, deformation and mode of the rotor of the multi-stage stamping pump under various operation conditions were calculated and analyzed using the one-way fluid-solid coupling method. Three-dimensional interior turbulent flow field in the pump were simulated steadily, and the distribution of flow parameters were obtained. The fluid loads were imposed on the surfaces of the hydraulic components. The finite element method was used to examine the strength of the impeller and to analyze the mode of the rotor. The results indicate that the maximum equivalent stress of the impellers arises at the impeller hub, and the maximum deformation appears at the impeller outlet while the maximum equivalent stress and deformation decrease with the increase of the stages of the pump. As the flow rate increases, the maximum equivalent stress on the impeller declines while the maximum deformation is gradually increased. The research results can provide reference for optimization design of the stamping pump.