Motor rotor, magnetic suspension motor and installation method thereof

The invention discloses a motor rotor, a magnetic suspension motor and a mounting method thereof. The motor rotor comprises a rotor and a sliding sleeve, the sliding sleeve and the rotor are in clearance fit to form a medium flow channel between the inner side of the sliding sleeve and the outer side of the rotor, and the sliding sleeve is provided with a medium inlet and a medium outlet. And a cooling medium enters the medium flow channel through the medium inlet and flows out of the medium outlet, so that the rotor is suspended in the sliding sleeve. According to the invention, when the rotor rotates at a high speed, the rotor can be stably suspended at the axis center position of the rotating shaft under the actions of gyroscopic effect, fluid viscous force and fluid pressure, and the whole rotor and the sliding sleeve rotate without mechanical contact, so that the rotor is suspended in the sliding sleeve; meanwhile, the cooling medium can take away heat of the rotor and heat generated by the stator core,