1, The working principle of submersible pumps
Before starting the pump, the suction pipe and pump must be filled with liquid. After starting the pump, the impeller rotates at high speed, and the liquid in it rotates with the blades. Under the action of centrifugal force, it flies away from the impeller and shoots outward. The injected liquid gradually slows down in the diffusion chamber of the pump casing, and the pressure gradually increases. Then, it flows out from the pump outlet and discharge pipe. At this point, due to the liquid being thrown towards the surrounding area at the center of the blade, a vacuum low-pressure zone is formed where there is neither air nor liquid. The liquid in the liquid pool, under the action of atmospheric pressure on the pool surface, flows into the pump through the suction pipe. In this way, the liquid is continuously sucked up from the liquid pool and continuously flows out from the discharge pipe.