The air motor is mainly composed of stators, rotors, vanes and other parts. There are air distribution slots or holes for intake and exhaust on the stator, and long slots are milled on the rotor, and there are blades in the slots. The two ends of the stator are provided with sealing covers, and the sealing covers are provided with arc-shaped grooves which communicate with the inlet and exhaust holes and the bottom of the blade. The rotor and stator are eccentrically installed. In this way, several sealed working volumes are formed by the outer surface of the rotor, the blades (between the two blades), the inner surface of the stator and the two sealing end covers.

