The impeller is mounted in the pump casing and fastened to the pump shaft. The pump shaft is directly driven by the motor. There is a liquid pipette in the center of the pump housing. Liquid enters the pump through the bottom valve and suction tube. The liquid discharge port on the pump housing is connected to the discharge pipe.
Before the pump starts, the pump casing is filled with the liquid to be conveyed; after starting, the impeller is driven by the shaft to rotate at a high speed, and the liquid between the blades must also rotate. Under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer edge and obtains energy, leaving the outer edge of the impeller at a high speed into the scroll casing. In the volute, the liquid is decelerated due to the gradual enlargement of the flow passage, and part of the kinetic energy is converted into static pressure energy. Finally, the liquid is discharged into the discharge pipe with high pressure and sent to a place where it is needed. When the liquid flows from the center of the impeller to the outer edge, a certain vacuum is formed in the center of the impeller. Since the pressure above the liquid level of the reservoir is greater than the pressure at the inlet of the pump, the liquid is continuously pressed into the impeller. It can be seen that as long as the impeller is constantly rotating, the liquid is continuously sucked in and discharged.
The principle of the linear pump is different from that of any other pump. The principle of magnetic levitation and the hydrodynamic structure of the spiral ring are used to realize the fluidity advancement, that is, the shaft is cancelled, the shaft connection is cancelled, and the shaft sealing structure is cancelled. After the start, the current is converted into a magnetic field, and the magnetic field drives the operation of the spiral ring, that is, the spiral ring lifts the fluid forward.