1, cavitation
Liquid at a certain temperature, reducing the pressure to the temperature of the vapor pressure, the liquid will produce a bubble. This
bubble phenomenon known as cavitation.
2, cavitation bubble collapse
Generated when the cavitation bubbles flow to high pressure at, and its volume is reduced resulting in burst. This phenomenon known as
cavitation bubble collapse in the liquid due to the pressure of rising bubbles disappear.
3, resulting in cavitation of the causes and hazards
Pump in operation, the flow part of the local area (usually somewhere in the impeller blade inlet later) for some reason, the absolute
pressure of the pumped liquid is reduced to the temperature vaporization of the liquid pressure, liquid in the Department begins to
vaporize and produce large amounts of steam, the formation of bubbles when the liquid containing a large number of bubbles to move
through the high-pressure zone within the impeller, the bubbles around high-pressure liquid causing bubbles dramatically reduced and
even rupture. In the bubble condensation rupture at the same time, the liquid particles to high speed filling holes, at this moment have
a very strong water hammer, and the impact of high frequency to combat the impact of stress of the metal surface up to several hundred
to several thousand atmospheres , the impact of frequency up to tens of thousands of times per second, will be serious wall thickness
breakdown.
4, the cavitation process
Bubbles in the pump and bubble bursting flow components suffer damage process is pump cavitation process. Pump to produce cavitation In
addition to the destructive effects of the flow parts, but also generate noise and vibration, and lead to the degradation of the pump
will pump fluid in severe interrupted, not working properly.
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