The impeller is mounted in the pump casing and fastened to the pump shaft, and the pump shaft is directly driven by the motor. There is a liquid suction pipe in the center of the pump casing. The liquid enters the pump through the bottom valve and the suction pipe. The liquid discharge port on the pump casing is connected to the discharge pipe.
Before the pump is started, 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 high speed into the volute casing. In the volute, the liquid decelerates due to the gradual expansion of the flow path, and part of the kinetic energy is converted into static pressure energy, and finally flows into the discharge pipe at a relatively high pressure and is 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 tank 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 rotates continuously, the liquid is continuously sucked in and discharged.
The working 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 fluid advancement, that is, the shaft is canceled, the shaft connection is cancelled, and the shaft seal structure is cancelled. After starting, the current is converted into a magnetic field, and the magnetic force drives the spiral ring to operate, that is, the spiral ring promotes the advancement of the fluid.