Pump vaporization damage

Because the pump vaporization space-time bubble in regions of high pressure continuous attack break with followed intense water hammer, so pump vaporization damage is will attack the oscillations and noise can hear like the explosion beans like crackling noise, accordingly can roughly judge is not attack the vaporization, written to the situation a few air to buffer vibration and noise and damage of metal, this approach in the turbine has been widely used, but in the pump rarely used.

Pump for a long time under the conditions of vaporization, the pump flow parts of some local will be damaged, that is, cavitation. This is because vaporization

At the onset of the metal surface, the pump attack vaporization of the damage the metal surface was like a sharp knife, the fierce impact of metal pitting perforation resulting. Sometimes metal particles loose and fall off and honeycomb, cavitation in addition to the mechanical effect, also accompanied by electrolysis, chemical corrosion and so on the many kinds of complex effect.

Practice has proved that the site is by cavitation bubble rupture place. So often during the Kalachakra import later and pressure water chamber of import parts found traces of cavitation, but vaporization happen at the impeller inlet, want to completely cure vaporization necessary to prevent cavitation occur at the impeller inlet.

Pump vaporization of the impeller and the liquid energy exchange was interference and damage, the performance of the external performance is the head of a flow curve, the power flow curve of a shaft, the efficiency of a flow curve. Severe will cause the liquid flow in the pump stopped, causing the pump can not work. But there was no significant change in the blue line of the early stage of the pump attack, when the change of the function curve, the degree of vaporization has been carried out to a certain extent.