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

1
Department of Mechanical Engineering, Bu-Ali Sina University, Hamedan 65175-4161, Iran
2
Automotive Engineering Department, Tehran 16846-13114, Iran
*
Author to whom correspondence should be addressed.
Academic Editors: Hamed Kalhori and Aleksandar Pavic
Received: 26 November 2020 / Revised: 11 January 2021 / Accepted: 26 January 2021 / Published: 9 February 2021
(This article belongs to the Special Issue Inverse Dynamics Problems)
This paper investigates the effect of impeller diameter on the dynamic response of a centrifugal pump using an inverse dynamic method. For this purpose, the equations of motion of the shaft and the impeller are derived based on Timoshenko beam theory considering the impeller as a concentrated mass disk. For practical modeling, the model of Jones and Harris is added to the equation to include the effect of bearings. As a case study, the model is applied to a process pump used in an oil refinery. Computing the eigenvalues of the model and comparing them with the natural frequencies of the structure, the model updating of the problem is performed through an indirect method. Three impellers with different diameters are applied to the updated model. The results show that increasing the diameter of the pump impeller can increase the amplitude of vibration up to 52% at critical speeds of the rotor. It is found that in addition to the hydraulic condition and efficiency, the impeller diameter should be considered as an important factor in the selection of centrifugal pumps. View Full-Text
Keywords: rotor dynamic; bearing; centrifugal pump; impeller diameter; Lagrangian equations rotor dynamic; bearing; centrifugal pump; impeller diameter; Lagrangian equations
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MDPI and ACS Style

Shooshtari, A.; Karimi, M.; Shemshadi, M.; Seraj, S. Effect of Impeller Diameter on Dynamic Response of a Centrifugal Pump Rotor. Vibration 2021, 4, 117-129. https://0-doi-org.brum.beds.ac.uk/10.3390/vibration4010010

AMA Style

Shooshtari A, Karimi M, Shemshadi M, Seraj S. Effect of Impeller Diameter on Dynamic Response of a Centrifugal Pump Rotor. Vibration. 2021; 4(1):117-129. https://0-doi-org.brum.beds.ac.uk/10.3390/vibration4010010

Chicago/Turabian Style

Shooshtari, Alireza, Mahdi Karimi, Mehrdad Shemshadi, and Sareh Seraj. 2021. "Effect of Impeller Diameter on Dynamic Response of a Centrifugal Pump Rotor" Vibration 4, no. 1: 117-129. https://0-doi-org.brum.beds.ac.uk/10.3390/vibration4010010

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