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23、水泵偏离寓效点运行能耗大小如何? 怎样计算多损耗的功率? 答:一些选型配套不合理的井泵,如低扬程的泵用在高扬程下抽水和高扬程的泵用在低扬程下抽水等,水泵都会偏离高效点运行。这时水流在叶片进口端将产生脱流,产生较大的冲击损失,使水泵的水力损失增大,水力效率降低而能耗增大。如某地取水净扬程为7.62m,而选用流量为350L/S,扬程为16.2m的水泵一台,由于水泵扬程偏高,实测水泵流量高达380～400L/S,水泵
23. How does the energy consumption of the pump deviate from the point of effect? How to calculate the power consumption of multiple losses? A. Some well-selected well pumps, such as pumps with low lift, are used for pumps with high lift and high lift. Pumps are pumped at low heads, and the pump will deviate from the efficient point of operation. At this time, the water flow at the inlet end of the blade will produce a de-flow, resulting in a greater impact loss, so that the hydraulic loss of the pump increases, the hydraulic efficiency decreases and the energy consumption increases. For example, if the net head for water intake is 7.62m, and the pump with a flow rate of 350L/S and head of 16.2m is used, the pump flow rate measured is as high as 380-400L/S due to the high lift of the pump.