Rotary Vane Operating Principles Technical Animation

What is the operating principle of a Rotary Vane Vacuum Pump?
This animation shows the operating principle for an oil lubricated rotary vane vacuum pump. Please note: Every oil-lubricated rotary vane vacuum pump is based on the same standard components. Depending on the design, size or model, there are further different components. A rotary vane vacuum pump in its simplest definition is a type of pump technology that enables the compression of air inside the pump chamber to create suction for the removal of air molecules from a vessel or area.
Rotary vane vacuum pump works on a positive-displacement pumping principle. The design consists of a rotor, which is mounted eccentrically inside a cylindrical housing or stator. Blades, mounted inside the rotor, move in and out due to centrifugal force following the internal surface of the housing. The operating principle of an oil lubricated rotary vane pump can be seen below.
1. Pressure increase by volume reduction is the principle behind rotary vane operation. The whole cylinder housing is wetted with a film of oil on which the blades run almost without any wear.
2. The oil lubrication is produced purely by the differential pressure of the housing and the oil separator housing. This is achieved through some oil pipes between the housings.
3. In a cylindrical housing, a rotor is positioned eccentrically so that it is on the top almost touching the cylinder housing. The blades are pressed on the wall of the housing by centrifugal force and generate three different chambers which capture the air.
4. When the first chamber is opened, the air flows through the suction flange into the compressor chamber.
5. While the rotor rotates, the next blade closes this chamber (and opens directly the next one) At this point the area between the blades has achieved its maximum air volume.
6. The oil gas mixture gets compressed by volume reduction and blows out into the oil separator housing.
7. Some pump models are fitted with outlet valves which stop the backflow of discharged air when the maximum pressure has been reached or the pump is switched off.