Effect of Impeller Diameter on Dynamic Response of a Centrifugal Pump Rotor

This paper investigates the effect of impeller diameter on dynamic response a centrifugal pump using an inverse method. For this purpose, equations motion shaft and are derived based Timoshenko beam theory considering as concentrated mass disk. practical modeling, model Jones Harris is added to equation include bearings. As case study, applied process used in oil refinery. Computing eigenvalues comparing them with natural frequencies structure, updating problem performed through indirect Three impellers different diameters updated model. The results show that increasing can increase amplitude vibration up 52% at critical speeds rotor. It found addition hydraulic condition efficiency, should be considered important factor selection pumps.