What are the reasons for the decline in the operating efficiency of the sewage pump? There are the following:
1. Due to the scouring of the water flow, the inner wall of the sewage pump flow channel and the impeller passing water surface become rough and uneven, the friction coefficient of the flow channel in the sewage pump increases, and the water flow rate in the pump is large, and the head loss increases. Hydraulic efficiency is reduced.
2. Due to the reasons such as adding medicine or water quality before the sewage pump, the pump casing is seriously fouled or corroded. Severe fouling in the pump casing can increase the wall thickness of the pump casing by about 2 ram, and the inner wall of the sewage pump forms a scale tumor, which reduces the volume of the pump body, reduces the pumping volume, and the flow channel is rough, and the head loss increases. Both volumetric efficiency and hydraulic efficiency are reduced.
3. Due to the defects of casting diaphragm pump, cavitation, abrasion, corrosion and chemical erosion caused by the processing technology, there are voids or cracks in the pump flow channel, and vortices are generated when the water flows, resulting in energy loss. Hydraulic efficiency is reduced.
4. Cavitation on the surface of the impeller.
5. Volume loss and mechanical loss. Due to the long use time of the pump, the mechanical wear produces leakage and increases the resistance, which reduces the volumetric efficiency and mechanical efficiency
The reason for the decline in the operating efficiency of the sewage pump
