Self-priming pump suction pressure changes

self-priming pump suction pressure, the pressure of the pump suction pipe change

in the operation of the self-priming pump, because of the high-speed rotating impeller, created a vacuum at the entrance to it, at atmospheric pressure in the impeller inlet suction pool water under the action of pressure difference, the water from the suction tube into the impeller inlet. Because 1 ATM is equal to 10. 33 mh2o is high, so the largest self-priming pump suction lift HSS in less than 10. 33m. In fact, the pressure difference in the process of the flow of the water head to head into position, velocity, and to overcome all the head loss, but also be in the import has certain energy ( Head) , which makes the self-priming water pump suction height less than 10. 33m。

from the self-priming pump inlet to the impeller entrance, passage of water cross section area is generally shrinkage decreases, and when traffic must flow velocity along the increase, but the pressure is reduced. , when the water flow into the impeller flow around, the head of blade, a sharp turn, velocity increases, the k is especially significant point on the back of the blade, make water flow in the k point pressure sharply lower. K points later, due to the leaf on water power, water flow in the impeller by mechanical energy by the blade, the pressure to rise rapidly. The velocity change and the water from the pump imported into k points in the process, all accompanied by hydraulic loss, energy consumption, lower the pressure.

so, self-priming pump suction pressure is according to the direction of the flow along the decline, the pump inlet is not the lowest pressure in pump, pump water pressure in the lowest place is near the blade inlet on the back of the k point.

related products: ZW self-priming pump, movable self-priming pump, vertical self-priming pump

the self-priming pump suction pressure change of original articles by our professional self-priming pump company, please do not reprint

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