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2025/06/26
Analysis of the main differences between submersible pumps and centrifugal pumps
Working principle of the submersible pump: Before starting the pump, the suction pipe and the inside of the pump must be filled with liquid. After starting the pump, the impeller rotates at high speed, and the liquid inside rotates together with the blades. Under the action of centrifugal force, the liquid is thrown outward from the impeller. The ejected liquid gradually slows down in the pump casing diffusion chamber, and the pressure gradually increases, then flows out from the pump outlet and discharge pipe. At this time, a vacuum low-pressure zone without air or liquid is formed at the center of the blades because the liquid is thrown outward. Under the atmospheric pressure on the surface of the liquid pool, the liquid flows into the pump through the suction pipe. In this way, the liquid is continuously drawn up from the liquid pool and continuously discharged from the discharge pipe.
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