基于离心泵全流场的流固耦合分析

运用ANSYS workbench软件,选取IS100-65-200型单级单吸离心泵作为研究对象,对离心泵包括叶轮、螺母和轴等转子系统进行单向流固耦合分析。在流固耦合计算中,施加到固体结构的流场载荷不仅有叶轮和蜗壳内部流场,同时还考虑了叶轮前后腔的流场载荷;对转子系统力学分析仅对轴承与轴接触处采用轴向和径向约束较符合实际的约束条件。此外,为了解泵转子系统的固有频率和临界转速等问题,本文还对转子系统进行了模态分析,得到了其固有频率和振型,并将计算得到的临界转速与常规的临界转速计算结果进行了对比分析。

Fluid-solid Interaction Analysis of Centrifugal Pump Based on Whole Flow Field

The single-stage single-suction type IS100-65-200 centrifugal pump was selected as the research object. By using ANSYS Workbench code,the rotor system of the centrifugal pump,including its impeller,nut and shaft,was analyzed by oneway fluid-solid coupling method. The fluid loads applied to the structure included not only from internal flow of the impeller and volute,but also from the flow fields in both front-chamber and the back-chamber of the impeller. A realistic constraint condition,only restraining the movements in axial and radial direction of the bearing contacted with the shaft,was used to analyze the mechanics performance of the rotor system. In addition,to understand the natural frequency and critical speed of the rotor system,the modal analysis of the rotor system was also carried out. The inherent frequency and the vibration model of the rotor system were calculated accordingly. The critical value of rotational speed was obtained and compared with the calculated one by the conventional method.