某核电用上充泵转子动力学特性分析  

Dynamic Characteristics Analysis of Charging Pump Rotor for Nuclear Power Plant

作　　者：刘政 马宇航 肖志慧 吴骞 任映霖 李启行 LIU Zheng;MA Yu-hang;XIAO Zhi-hui;WU Qian;REN Ying-lin;LI Qi-hang(Liaoning Hongyanhe Nuclear Power Co.,Ltd.;Beijing Key Laboratory of Health Monitoring andSelf-recovery for High-end Mechanical Equipment,Beijing University of Chemical Technology)

机构地区：[1]辽宁红沿河核电有限公司 [2]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室

出　　处：《化工机械》2024年第1期106-113,共8页Chemical Engineering & Machinery

摘　　要：以一台RCV上充泵为研究对象,构建了考虑流体激励的泵转子动力学方程,通过流体动力学仿真方法获得导轴承和密封构件支承点的动力学参数,并进行多级充液态(即湿态)离心泵的转子进行了动力学分析。仿真结果表明:在该型转子中,充液使得支承点等效刚度增加,进而整体固有频率增加,由干态的柔性转子转变为湿态下的刚性转子。最后,结合现场振动数据的功率谱函数曲线峰值,确定了转子在刚性状态工作时的系统的固有频率,验证了建模的有效性。研究结果为整级上充泵的动力学建模仿真及模型验证提供了清晰的分析路径,对于后续的状态监测与故障诊断也有着重要意义。In this paper,through taking a RCV charging pump as the object of study,the pump rotor’s dynamic equation concerning the fluid excitation was constructed,including having the fluid dynamics simulation method adopted to obtain dynamic parameters of both guide bearings and sealing component support points,the rotor dynamic analysis of multistage liquid-filled(i.e."wet"state)centrifugal pump.The simulation results show that,regarding this rotor,the filling liquid can increase equivalent stiffness of the support point and the overall natural frequency.The flexible rotor in the"dry"state can be changed to the rigid one in the"wet"state.Through considering the peak value of power spectrum function curve of the field vibration data,when the rotor works in the rigid state,the system’s natural frequency can be determined,which verifies the effectiveness of the modelling.The research results provide a clear analysis method for the dynamic modelling and model verification of the whole-stage charging pump,and it is also of great significance for the subsequent condition monitoring and fault diagnosis.

关 键 词：离心式上充泵 转子动力学 轴承 密封 

分 类 号：TH311[机械工程—机械制造及自动化]