How to prevent centrifugal pump cavitation?
   It is well known that when there is air in the centrifugal pump housing, the centrifugal force is less due to the density of the air being much less than the density of the liquid. As a result, the pressure difference above the liquid level of the sump and the suction of the pump is not enough to push the liquid in the sump into the pump, that is, the centrifugal pump has no self-sucking ability so that the centrifugal pump can not deliver liquid. This phenomenon is called "cavitation phenomenon". So how to improve the centrifugal pump anti-cavitation performance? What tips? Shandong Yalong pump tell you, really meet hate ah!
   Tips to improve the anti-cavitation performance of the centrifugal pump itself
   (1) to improve the structure of centrifugal pump inlet to the impeller. Increase the flow area; increase the radius of curvature of the inlet section of the impeller cover to reduce the sharp acceleration and pressure drop of the flow; appropriately reduce the thickness of the inlet of the blade and round the blade inlet to make it close to the streamlined shape; Reduce the flow around the blade head acceleration and pressure; improve the impeller and the blade inlet part of the surface finish to reduce the resistance loss; the blade inlet edge to the impeller inlet extension, the flow of fluid to accept work in advance to increase pressure.
   (2) the use of pre-inducer, the flow in the pre-induction wheel ahead of work to improve the flow pressure.
   (3) The double-suction impeller allows the flow to enter the impeller from both sides of the impeller simultaneously, doubling the inlet cross-section and reducing the inlet flow rate.
   (4) the design conditions slightly larger positive angle of attack, in order to increase the blade inlet angle, reducing the blade inlet bending, reducing the blade obstruction, in order to increase the import area; to improve the working conditions of large flow to reduce Loss of circulation. But the positive angle of attack should not be too large, otherwise it will affect the efficiency.
   (5) The use of anti-cavitation materials. Practice shows that the higher the strength, hardness and toughness of the material, the better the chemical stability and the stronger the anti-cavitation performance.
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