The metal particles and the liquid away from the mother

Slurry cavitation mechanism

The particular shape of the blades and the rapid flow in which a sudden change in the flow characteristics of the liquid in the Slurry flow impeller , making leaf tract fluid pressure distribution presented imbalance .

The liquid phase inlet flow blade , the blade is not acting on the fluid before , there is a low pressure region locally . When low pressure area of the liquid flow pressure is reduced to the saturated vapor temperature of the liquid , the liquid will vaporize to form bubbles gradually began ; bubbles with the fluid flowing in the flow path at the time and the higher the pressure transient collapse . The moment the bubble burst , the fluid surrounding the bubble burst bubbles formed when the rapid influx of holes , and is accompanied by localized high temperature , high pressure water hammer phenomenon, which is the mechanism of cavitation . According to foreign scholars experimental study reported cavitation water hammer are the main features of the partial pressure of up to 30MPa ( manometry area of 1.5mm2). Have been measured cavitation occurs when liquid water hammer frequency of 25,000 times / second , the metal surface under water hammer for repeatedly struck by fatigue damage.

And, in a continuous cyclical pressure wave , the liquid quickly seep in and out of the pores of the metal , the metal surface of a concavity , the metal particles and the liquid away from the mother , resulting in severe pitting . Large parts of the pump in such a periodic force , the pump will cause noise and vibration , so that the pump cavitation great harm , mainly in the following aspects : Performance of the pump nosedive.

At this point HQ curve , NQ curve downward trend so sudden , slurry pump manufacturer severe pump does not work, the pump flow interruption , mainly due to pump cavitation , the impeller and the energy transfer between the flowing liquid damage and interference , the fluid channel blocked not only by the bubble , and flow loss increases. Figure 2 : Slurry pump generates vibration and noise. Cavitation occurs when the pressure is high along with the bubbles collapse at continuously produced a strong hydraulic shock , making the pump vibration and noise.

Slurry pump mechanical surface flow components from mechanical damage , the surface of the impeller honeycomb or spongy . If the gases released during vaporization of the liquid is corrosive , will produce a certain chemical destruction ( destruction of the former is the main ) .