What is the working principle of a Rotary Vane Vacuum Pump Pump?
The Rotary vane vacuum pump is based on the principle of volume reduction, the entire cylinder housing is immersed in Oil and Oil acts as a sealer to reduce/minimise the slip losses between the rotary vanes and the stationary cylinder. This ensures tight sealing and minimal war loss on the blades. Oil lubrication can only be achieved by differential pressure between the housing and oil separator housing. Some oil pipes are used between the housings to achieve this. A cylindrical housing houses a rotating rotor. It is placed eccentrically so that the top of the housing touches the top. Centrifugal force is applied to the housing's wall by the blades. This creates three chambers that capture air. The vacuum chamber (suction) opens when the first chamber is opened. The rotor rotates and the next blade closes the chamber. (And opens directly next one). At this point, the air volume between the blades is at its maximum. The volume reduction of the oil gas mixture causes it to be compressed and then blows out into an oil separator housing.