Liquid Ring Vacuum Pump Working Principle

The impeller is mounted eccentrically in the pump body, when the impeller rotates, the water is thrown out in all directions by centrifugal force, forming a water ring along the inner wall of the pump body.

When the impeller rotates in the clockwise direction, in the process of the first half of the rotation, the cavity formed between the two neighboring blades gradually increases. The pumped gas is continuously sucked into the pump body through the suction port of the pump cover. In the process of the second half of the rotation, the inner surface of the water ring is gradually approaching the cavity between the two adjacent blades. The cavity gradually becomes smaller, the gas is compressed, and thus the pressure is increasing.

When the pressure is higher than the outside pressure, the gas is discharged through the crescent-shaped exhaust hole. Continuous rotation can be achieved by continuously pumping out the gas in the sealed container, so that a vacuum is formed inside the container.