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Forces on Centrifugal Pump Impellers

Jery, Belgacem and Brennen, Christopher E. and Caughey, Thomas K. and Acosta, Allan (1985) Forces on Centrifugal Pump Impellers. In: Second International Pump Symposium, April 1985, College Station, Texas.

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Forces are exerted on a centrifugal pump impeller, due to the asymmetry of the flow caused by the volute of diffuser, and to the motion of the center of the impeller whenever the shaft whirls. Recent work in the measurement of these forces as a function of the whirl speed to shaft speed ratio, and the influence of the volute, is reviewed. These forces may be decomposed into a steady force, a static stiffness matrix, a damping matrix and an inertia matrix. It is shown that for centrifugal pumps of the moderate specific speed typical of boiler feed stages, there is a region of potential shaft vibration excitation from the hydrodynamic forces if the operating speed is well above the first flexural critical speed.

Item Type:Conference or Workshop Item (Paper)
Additional Information:This work was supported in part by NASA Contract NAS8-34505 from the George C. Marshall Space Flight Center.
Record Number:CaltechAUTHORS:JERsips85
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107
Deposited By: Christopher Brennen
Deposited On:30 Dec 2004
Last Modified:02 Oct 2019 22:16

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