The serious impact of the pump cavitation

2020-10-22

The serious impact of the pump cavitation
When cavitation develops to a certain degree, it will affect the performance of the pump and hinder its normal operation. Mainly manifested in the following aspects:
(1) The performance of the pump changes. When cavitation occurs, it has no obvious effect on the external characteristics of the pump. After cavitation develops to a certain extent, the power, efficiency, flow rate and head of the pump will suddenly drop. When the cavitation is fully developed, the effective flow area of the water flow will be reduced a lot, so that the water flow will be interrupted and the work will not work.


 
(2) Vibration and noise. When the bubble bursts, the liquid particles impact each other, causing noise and unit vibration. The two mutually excite the pump to produce strong vibration, which is called cavitation resonance.
(3) Damage to the surface of the flow-through component. Cavitation damage will greatly shorten the life of the pump. When the erosion and corrosion are severe, major accidents such as blade fracture or perforation will occur.