Installation structure of compressor impeller

The invention discloses a mounting structure of a compressor impeller. The mounting structure comprises a motor rotor shaft, a transition shaft sleeve, a central pull rod, an impeller, a compression nut, an adjusting pad and a balance disc, rotor parts such as a centrifugal impeller, a shaft sleeve, a balance disc and a transition shaft in the centrifugal refrigeration compressor are connected through a center pull rod, and pre-tightening force is applied through a pressing nut. In the working process of the centrifugal refrigeration compressor, torque is transmitted among all the rotor partsthrough plane friction, due to the action of proper pre-tightening force applied to the gland nut, the rotor can be normally connected and operated, looseness is avoided, and the safety stock of all the rotor parts is reduced. The application of the central pull rod connection and plane contact interface torque transmission structure forms a structure of the invention, and the structure is particularly suitable for connec