Dynamic Performance and Fatigue Analysis of ASP Pump Rotor

Abstract

In this paper, static analysis, modal analysis and harmonic response analysis are carried out on the rotor structure of single-stage double-suction centrifugal pump. The fatigue life of the rotating shaft was analyzed with the nCode Designlife module in ANSYS. The results show that the maximum equivalent stress is greater than the allowable stress of the material and is located at the journal of the transmission torque connected with the coupling. The maximum deformation also occurs here at 0.4857mm. The axis of rotation is liable to resonate at the first natural frequency of the non-rigid body. The frequency which has the greatest influence on the vibration of the rotating shaft is near the third and fourth order natural frequencies of modal analysis and should be avoided. The minimum number of circulation at the maximum stress is 1.785e7 times, and other positions are above 1014 times. The results show that the pump group works stably under the design condition and the rotor performance meets the design requirements.