Cavitation in centrifugal pumps
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Under what conditions does a centrifugal pump experience cavitation, and in what situations does cavitation occur?
Generally, when transporting low-boiling-point liquids, centrifugal pumps are prone to cavitation. . . Causes of cavitation include too low inlet pressure, insufficient pre-cooling, and poor insulation. . .
Insufficient pre-cooling? Poor insulation? Bubbles will form if the temperature is high
Cavitation occurs when there is insufficient subcooling at the pump inlet, the inlet pressure is too low, or when there are non-condensable gases present
1. The inlet pressure is lower than the saturated vapor pressure at the operating temperature of the transported medium； 2. The high temperature of the conveyed medium results in a saturated vapor pressure that is higher than the inlet pressure.
When the temperature is too high, the saturated vapor pressure of the fluid being transported exceeds the inlet pressure, causing the fluid to vaporize and bubbles to form within the centrifugal pump.
Is the subcooling at the pump inlet insufficient? How should this be understood?
It can be understood as too high an water entry temperature, resulting in insufficient condensation before the pump