单级双吸离心泵转子系统的可靠性分析  

Reliability analysis of single-stage double-suction centrifugal pump rotor system

作　　者：张飞 权丽君[2] ZHANG Fei;QUAN Li-jun(Xuzhou Technician Branch,Jiangsu Union Technical Institute,Xuzhou 221000,China;Department of Computer Science and Technology,Soochow University,Suzhou 215000,China)

机构地区：[1]江苏联合职业技术学院徐州技师分院,江苏徐州221000 [2]苏州大学计算机科学与技术学院,江苏苏州215000

出　　处：《机电工程》2021年第9期1207-1211,共5页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(31801108)。

摘　　要：针对单级双吸泵转子系统可靠性问题,采用有限元的方法对转子进行了静力学分析和模态分析,对转子系统的可靠性进行了研究。首先,对单级双吸离心泵转子系统结构进行了分析,建立了转子系统的有限元模型;然后,针对转子系统的应力、强度、临界转速等方面,对单级双吸离心泵转子系统进行了可靠性分析;最后,对单级双吸离心泵的轴的临界转速理论进行了分析。研究结果表明:单级双吸离心泵转子系统的材料满足应力要求,轴危险截面处安全系数大于许用安全系数;模态分析和理论计算中,转子系统的一阶临界转速远离本身固定频率及倍频处,同时转子系统一阶临界转速计算值大于设计转速1.2倍,满足设计标准,不会产生共振现象。Aiming at the reliability issues of the rotor system of the single-stage double-suction centrifugal pump,the finite element method was used to conduct the statics analysis and the modal analysis of the rotor system,and the reliability of the rotor system was analyzed.First of all,the structure of the rotor system of the single-stage double-suction centrifugal pump was analyzed,and the finite element model of the rotor system was established.Then,according to the stress,strength,critical speed of the rotor system,the reliability analysis of the rotor system of the single-stage double-suction centrifugal pump was carried out.Finally,the theory of the critical speed of the shaft of the centrifugal pump was analyzed.The research results show that the rotor system material meets the stress requirements,and the safety factor at the dangerous section of the shaft is greater than the allowable safety factor.In modal analysis calculations and theoretical calculations,the first-order critical speed of the rotor system is far away from the fixed frequency and multiplier.At the same time,the calculated value of the first-order critical speed of the rotor system is 1.2 times greater than the design spinning speed,which meets the design standard and has no resonance phenomenon.

关 键 词：离心泵 转子系统 模态分析 可靠性分析 

分 类 号：TH311[机械工程—机械制造及自动化]