Reasons for the decrease in water pump efficiency

1. Due to the erosion of water flow, the inner wall of the pump channel and the water surface of the impeller become rough and uneven, and the friction coefficient of the flow channel inside the pump increases. In addition, the flow velocity of water inside the pump is very high, resulting in an increase in head loss. Hydraulic efficiency decreases.
2. Due to the addition of medication or water quality before the pump, severe scaling or corrosion may occur inside the pump casing. Severe accumulation of scale inside the pump casing can increase the wall thickness by about 2ram, and the formation of scale nodules on the inner wall of the water pump can reduce the volume of the pump body, decrease the pumping volume, and make the flow channel rough, resulting in increased head loss. Both passenger flow efficiency and hydraulic efficiency have decreased.
3. Due to casting defects, cavitation, abrasion, corrosion, and chemical erosion caused by the water pump processing technology, voids or cracks are formed in the pump flow channel, and energy loss is caused by vortices generated during water flow. Hydraulic efficiency decreases.
4. Cavitation on on the surface of the impeller. Due to the negative pressure generated during the operation of the blade's water surface, when the pressure Pk<Pva, air pockets and honeycomb surfaces are formed, which cause cavitation of the pump blades under the action of electrochemical corrosion.
5. Volume loss and mechanical loss. Due to the prolonged use of the pump, mechanical wear leads to leakage and increased resistance, resulting in a decrease in volumetric efficiency and mechanical efficiency.
The above reasons have led to a decline in the performance of the water pump. The operating efficiency is reduced by 2-5%, and in severe cases, the efficiency of the water pump can be reduced by more than 10%.