A review of cavitation effects on vibration in centrifugal pump

摘要

When pumps are operating at flow ratesconsiderably lower or higher than normal, intensity of cavitation is likely tobe greater than that at the best efficiency point. In particular for highspecific speed pumps such as mixed flow and axial flow pumps, various kind ofcavitation has been seen and similar cases was reported for low specific speedpump. Cavitation is a local vaporization of liquid induced by a hydrodynamicpressure reduction; it usually disturbs the normal flow field in pumps withvarious effects. This article will glimpse about the effects of cavitation incentrifugal pump with the help of vibration monitoring system and the techniqueis suggested to predict the onset of cavitation by means of average magnitudein frequency band, predominant frequencies, and repeatable frequencies.