在农田水利工程中离心式水泵应用得非常广泛。其流量、扬程和转速可从水泵铭牌上或有关说明书中查得,但是当没有上述资料可查时,如何判明其数值的大小呢?这里介绍一种简便的估算法。水泵流量的估算,是通过水泵的流量 Q 等于水泵进口面积 F 乘以进口处的 In the farmland water conservancy project centrifugal pumps are widely used. The flow rate, head and speed can be found on the pump nameplate or in the instruction manual, but how can we determine the magnitude of the value when there is no such information? Here is a brief description of the method. Pump flow is estimated by the pump flow Q is equal to the pump inlet area F multiplied by the entrance