中文摘要：

借助ANSYS软件,运用有限元方法,在计算3×8 3/4-10stg HSB型高速多级离心泵转子干态临界转速的基础上,又分别计算了转子在湿态下支承刚度、陀螺力矩、流体软化作用、口环支承等对转子临界转速的影响,此后再计入轴向应力对转子临界转速的影响。结果表明,浸液转子仅考虑流固耦合作用计算出的临界转速仍然存在着偏差;在流固耦合的基础上,再考虑轴向应力对转子动力特性的影响后,一阶临界转速提高了21%,其余各阶也有所提高,说明轴向应力对转子系统的临界转速有较大影响,且轴向应力对提高转子的稳定性有积极的作用。

英文摘要：

The dry state critical speed of the rotor of the high speed multistage centrifugal pump of 3× 8 3/4 - 10stg HSB was first calculated by means of the method of finite element and ANSYS software. After that, the effects on the critical speed of the rotor impressed by the support stiffness, gyroscopic couple, fluid softening effect, and mouth ring support, were computed respectively. Finally, the effect of the axial stress on the critical speed of the rotor was computed. The results showed that critical speed of the immersion rotor still existed deviation when only considering the fluid-solid coupling effect, and that considering the effect of the axial stress on the rotor dynamic characteristics the first critical speed was improved by 21% based on the fluid-solid coupling, and the ones of other order were also improved. It illustrated that the axial stress had an important effect on the critical speed of the rotor system and could improve the rotor stability.