Several Good Ways To Improve The Anti-cavitation Performance Of Pumps, You Must Know

The main measures to improve the anti-cavitation performance of Sanitary Centrifugal Pump are as follows:
1. Using a lower impeller inlet speed and increasing the impeller inlet diameter can reduce the impeller inlet speed and improve the cavitation performance of the pump, but the hydraulic efficiency of the pump is reduced.

2. Increasing the blade inlet edge width: can reduce the relative speed of the impeller inlet, thereby improving the cavitation performance of the pump.

3. The curvature radius of the impeller cover inlet: because the flow of the impeller inlet is affected by the centrifugal force at the turning point, the pressure is low and the flow rate is high near the front cover, resulting in uneven distribution of the impeller inlet velocity. Appropriately increasing the curvature radius of the cover is conducive to reducing u0 at the front cover and improving the uniformity of the velocity distribution, reducing the pressure drop at the pump inlet, thereby reducing NPSH, and improving the anti-cavitation performance of the pump.

4. Balance hole: The balance hole on the impeller, the leakage flow in it has a destructive effect on the mainstream entering the impeller. The area of ​​the balance hole should be no less than 5 times the gap of the sealing ring to reduce the leakage speed, thereby reducing the impact on the mainstream and improving the anti-cavitation performance of the pump.

5. Finish: The smoother the impeller inlet part, the smaller the hydraulic loss, which will significantly improve the anti-cavitation performance of the pump.

6. Use anti-cavitation materials: When it is impossible to completely avoid cavitation due to the limited use conditions, anti-cavitation materials can be used to manufacture the impeller to extend the service life of the impeller. Generally speaking, the smoother the surface of the part, the higher the material strength and toughness, the higher the hardness and chemical stability, the better the anti-cavitation performance of the material.

7. Use an inducer to improve the anti-cavitation performance of the pump: Adding an inducer in front of the centrifugal pump impeller can improve the anti-cavitation performance of the pump, and the effect is very significant. Practice has proved that after adding an inducer to the centrifugal pump, the cavitation ratio speed of the pump can reach about 3000.