How does Centrifugal Slurry Pumps Resist Cavitation?

It is well known that when there is air in the Sump Slurry Pump shell, the centrifugal force is generated because the density of the air is much smaller than the density of the liquid. Therefore, the pressure difference between the upper surface of the storage tank and the suction port of the pump is insufficient to press the liquid in the storage tank into the pump, that is, the centrifugal pump has no self-suction capability, so that the centrifugal pump cannot transport the liquid, and this phenomenon is called “cavitation”. phenomenon". So how do you improve the cavitation resistance of centrifugal pumps? What's the problem? As a Slurry Pumps Manufacturer, let's explain it to everyone.

Improve the cavitation resistance of the centrifugal pump itself:

(1) Improve the structural design of the suction port of the centrifugal pump to the vicinity of the impeller. Increase the flow area; increase the radius of curvature of the inlet section of the impeller cover plate to reduce the rapid acceleration and depressurization of the liquid flow; appropriately reduce the thickness of the blade inlet, and round the blade inlet to make it close to the streamline shape, or Reduce the acceleration and depressurization of the head of the flow vane; improve the surface finish of the impeller and the inlet part of the blade to reduce the resistance loss; extend the inlet edge of the blade to the inlet of the impeller, so that the liquid flow receives work in advance and increases the pressure.

Sump Slurry Pump

(2) The front induction wheel is used to make the liquid flow work in advance in the front induction wheel to increase the flow pressure.

(3) The double suction impeller is used to allow the liquid flow to enter the impeller from both sides of the impeller at the same time, and the inlet cross section is doubled, and the inlet flow rate can be doubled.

(4) The design condition adopts a slightly larger positive angle of attack to increase the inlet angle of the blade and reduce the bending at the inlet of the blade. Reduce blade blockage to increase inlet area; improve working conditions at high flow rates to reduce flow losses. However, the positive angle of attack should not be too large, otherwise it will affect efficiency.

(5) Use materials resistant to cavitation. Practice has shown that the higher the strength, hardness and toughness of the material, the better the chemical stability, and the stronger the cavitation resistance of Centrifugal Slurry Pumps.