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


ZHANG Fei1, QUAN Lijun2

(1.Xuzhou Technician Branch, Jiangsu Union Technical Institute, Xuzhou 221000, China;
2.Department of Computer Science and Technology, Soochow University, Suzhou 215000, China)


Abstract:  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.

Key words:  centrifugal pump; rotor system; modal analysis; reliability analysis

ZHANG Fei, QUAN Li-jun. Reliability analysis of single-stage double-suction centrifugal pump rotor system［J］.Journal of Mechanical & Electrical Engineering, 2021,38(9):1207-1211.