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Large Water Pumps

Large water pumps Double suction pump efficiency decline reason:
1. due to the erosion of the water flow, the inner wall of the pump runner and the impeller become rough and rough, and the frictional coefficient of the flow passage in the pump increases. In addition, the flow rate of water in the pump is very big, and the head loss increases. Hydraulic efficiency is reduced.
2. due to dosing drugs or water quality before the pump and other reasons, so that the pump casing serious scaling or corrosion. Serious pump casing can make the pump shell wall thickness increased 2ram or so, and the formation of dirt on the pump wall, so that the pump volume is reduced, reducing the amount of pumping, and the runner rough, increased head loss. Passenger plot efficiency and hydraulic efficiency are reduced.
3. due to casting process caused by pump defects, cavitation, erosion, corrosion and chemical etching and other causes of hollow or cracks in the pump flow path, resulting in vortex water flow caused by energy loss. Hydraulic efficiency is reduced.
4. impeller surface cavitation. As the negative pressure is generated when the blade is running on the surface of the water, when the pressure Pk

5. volume loss and mechanical loss. Due to the long pump life, loss of mechanical wear and increased resistance, the volumetric efficiency and mechanical efficiency. The above reasons, the performance of the pump worse. Operating efficiency decreased by 2 ~ 5%, serious pump efficiency can be reduced by 10% or more.

Large Water Pumps

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