How to increase the static head of a centrifugal pump
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What measures can be taken to effectively increase the static pressure energy of a centrifugal pump?
Pump output energy = dynamic pressure energy + static pressure energy. Reducing the dynamic pressure energy increases the static pressure energy. Theoretically, the casing acts as an energy conversion device that changes the diameter of the fluid flow channel, thereby reducing the flow velocity and increasing the static pressure energy
The question is a bit vague. To increase the static head of the pump in use, one can close the valve a little, thereby reducing the flow rate； or increase the speed ； Or replacing it with a larger impeller, etc., can all increase the pump’s static head.
It was said upstairs that closing the outlet valve can increase the pressure, but the pump’s outlet valve is usually located very close to the pump; doesn’t that reduce the pressure in the pipeline?
The shape of the blade can be changed, with the forward-facing blades having the maximum theoretical static pressure head.
Besides, “the valve can be turned down a bit, thereby reducing the flow rate”； or increase the speed ； Or replacing it with a larger impeller, etc., can all increase the pump’s static head. ” Multi-stage pumps can also be used, which have a very high head. Take a look at Bernoulli’s equation (a classic formula in fluid dynamics)