Small-flow two-stage high-speed direct-drive compressor impeller assembly structure and method

The invention relates to the technical field of turbines, and particularly discloses a small-flow two-stage high-speed direct-drive compressor impeller assembling structure and method.The small-flow two-stage high-speed direct-drive compressor impeller assembling structure comprises a high-speed motor, a motor rotor, a first-stage pin shaft, a first-stage impeller, a first-stage locking nut, a first-stage pull rod, a second-stage pin shaft, a second-stage impeller, a second-stage locking nut and a second-stage pull rod; the motor rotor is arranged in the high-speed motor, one end of the first-stage pull rod is embedded into one end of the motor rotor, the first-stage impeller is arranged on the outer surface wall of the first-stage pull rod in a sleeving mode, the first-stage locking nut is in threaded connection with the first-stage pull rod, and one end of the second-stage pull rod is embedded into the end, away from the first-stage pull rod, of the motor rotor. The second-stage pin shaft is embedded betwee