Hello! I know the working principle is: the impeller rotates at high speed in the pump casing, generating centrifugal force. The liquid filled with impeller by centrifugal force, from the impeller around the high-speed thrown out, high-speed flow of liquid pooled in the pump casing, its speed decreases, the pressure increases. According to the liquid always flow from the high-pressure area to the low-pressure area of the reasoning, the pump casing of the high-pressure liquid into the low-pressure export pipeline (or the next impeller), in the impeller will be thrown out of the liquid around at the same time, in the center of the suction chamber of the impeller to form a low-pressure, the liquid in the outside world under the action of atmospheric pressure, a steady stream of impellers into the low-pressure area of the suction port center of the impeller to replenish. Make the pump work continuously.
Don't know if it is useful to you.