Cavitation, also called cavitation, is a mechanical phenomenon. Oil pump in the process of operation, when the flow of local pressure reduced to vaporization (saturated vapor pressure), the liquid begins to boil, generates a lot of bubbles, these are filled with gas or steam bubble quickly expanding, expanding and movement before along with the fluid flow, to the pressure is high, bubble around the high pressure liquid causes bubbles flash to shrink, and rapid condensation, crush, At the same time, the liquid particles around the bubble due to inertia to fill the bubble at high speed, collision, noise, vibration, this phenomenon is cavitation. When cavitation occurs near the solid wall surface, the flow parts will be corroded and destroyed.
When the oil pump is cavitation eroded, the energy exchange of liquid in the impeller is disturbed and destroyed. The performance of the oil pump is reduced, and the liquid flow in the water pump is interrupted and cannot work.
Cavitation is caused by the vaporization of water, if the minimum pressure in the pump is higher than the vaporization pressure at this temperature, the oil will not vaporize in the pump to form bubbles, the pump will not occur cavitation. The vaporization pressure of the oil is related to the oil temperature, which can be checked from the relevant high temperature oil pump manual.
