The main parts of the sliding vane compressor consist of three parts: the body (also known as the cylinder), the rotor and the sliding vane.
The rotor eccentricity of the sliding vane compressor is arranged in the cylinder, and a number of longitudinal grooves are opened on the rotor, in which a sliding vane can slide freely along the radial direction.
Because the rotor is eccentric in the cylinder, a crescent space is formed between the inner wall of the cylinder and the outer surface of the rotor. When the rotor rotates, the sliding plate is thrown out of the groove by the centrifugal force, and its end is close to the circular wall of the body. The crescent space is divided into a small chamber - the primitive volume.
Within one rotation of the rotor, the volume of each primitive will gradually increase from the minimum value to the maximum value, and then gradually decrease from the maximum value to the minimum value. With the continuous rotation of the rotor, the volume of the primitive changes in accordance with the above law.
As the primitive volume gradually increases, it meets the suction port on the left. The gas begins to be inhaled until the volume of the primitive reaches its maximum, and the inhalation terminates when the following slide (relative to the direction of rotation) that makes up the volume of the primitive passes over the upper edge of the intake orifice. Later, the elementary volume begins to shrink and the gas is compressed within it. When the previous slide composed of the primitive volume reaches the upper edge of the exhaust port, the primitive volume begins to communicate with the exhaust port, then the compression process ends and the exhaust begins. When the last slide of the primitive volume passes over the lower edge of the exhaust orifice, the exhaust terminates. After that, the primitive volume reaches the minimum value. As the rotor continues to rotate, the primitive volume begins to increase again. Thus, the compressed gas remaining in this minimum volume expands. When the first slide of the primitive volume reaches the lower edge of the suction orifice, the expanding primitive volume communicates with the suction orifice and starts to inhale gas again. If the number of slides is z, then in each rotation of the rotor, there are z primitive volumes for inspiration-compression-exhaust-expansion process respectively.
