The oil injected rotary vane is a positive displacement type, which means that a given quantity of air or gas is trapped in a compression chamber and the space which it occupies is mechanically reduced which causes a corresponding pressure to rise before discharging.
The compression process of an oil injected rotary vane happens inside of a fixed cylindrical smooth bore housing. The solid cylindrical rotor has radial slots with vanes and is placed eccentrically in the fixed cylinder. As the rotor turns, centrifugal force pushes the vane out of the slot against the wall of the fixed cylinder. Consecutive volumes of air are captured and reduced as the rotor turns and the vanes slide extend and retract. In other words, “volumetric cells” which are bounded by the rotor, adjacent vanes, and the stator bore, reduce in size as the rotor turns due to its eccentric position. An inlet port is positioned to allow air to flow into each cell exposed to the port, filling each cell by the time it reaches its maximum volume. After passing the inlet port, the size of the cell is reduced as rotation continues, as each vane is pushed back into its slot in the rotor. The volume and pressure of air trapped between the vanes in each compression cell is equalized axially across the rotor/stator from end cover to- end cover throughout the compression process. This simplifies the compression process and eliminates the need for thrust bearings. Compression continues until the discharge port is reached, when the compressed air is discharged.
Because of such a wide variety of products for every application, not all products are listed above, with new ones coming out every day. Please contact 1st Quality Air Inc., your compressed air experts for proper application.
