Transient response and critical speed analysis of large vertical volute pump

Asian Working Group- IAHR's Symposium on Hydraulic Machinery and Systems

Liu, D.^1,2 ; Ding, S.C.^2 ; Wang, Z.^1 ; Yu, L.J.^2

Shanghai Kaiquan Pump (Group) Co., Ltd., Shanghai

201800, China^1

School of Energy and Power Engineering, Jiangsu University, Zhenjiang

212013, China^2

关键词: Analytical investigations;    Monitoring points;    Periodic variation;    Radial displacements;    Stiffness and damping;    Three dimensional finite element analysis;    Time independents;    Time-independent values;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/163/1/012048/pdf
DOI  :  10.1088/1755-1315/163/1/012048

来源: IOP

【 摘 要 】

The analytical investigation of the rotor dynamics system in large vertical volute pump is presented in this paper. The radial force imposed on impeller is a time-independent value which is extracted from the numerical simulation results. A three-dimensional finite element analysis of the pump rotor was performed to investigate the critical speed and mode shape. The transient response of the rotor dynamics is studied by analysing radial excitation force at variable flow conditions. In addition, the stiffness and damping of the bearings are calculated by Software ARMD. The result shows that the resonance of pump will not occur under design condition. The radial displacement of monitoring point at impeller presents periodic variation when the time-independent radial force is imposed on impeller.