Theory of multistage booster centrifugal pump
When the motor drives the impeller on the axis to rotate at high speed, the liquid filled in the impeller is thrown around the impeller along the flow passage between the blades under the action of centrifugal force. Because the liquid is acted by the blade, the pressure and speed increase simultaneously, and is directed to the second impeller through the flow passage of the guide shell. Sample principle, successively flow through all impellers and guide shells, further increase the pressure energy of the liquid. After each impeller is stacked step by step, a certain lift is obtained.