Rotor of an electric asynchronous machine and method for its production

A rotor of an electric asynchronous machine comprising:

• a shaft defining a central longitudinal axis and having an outer lateral surface radially spaced from the axis, a cavity extending axially within the shaft, at least one passageway opening on the lateral surface of the shaft, and at least one channel connecting the cavity to the at least one passageway;
• a rotor laminated core having a first end face and a second end face spaced therefrom in the axial direction, the rotor laminated core having at least one channel extending within the rotor laminated core from the first end face to the second end face;
• and
• first and second short-circuit rings respectively attached to the first and second end faces of the rotor laminated core, at least one of the first or second short-circuit rings comprising at least two disks interconnected to one another to form a disk pack, each of the at least two disks having circular and oppositely facing inner and outer ring-shaped surfaces, the at least two disks being disposed in side-by-side adjacent relation with one another such that the inner surfaces of the at least two disks face each other and are in surface contact, at least one disk of the at least one short-circuit ring having recesses arranged such that a channel structure is formed inside the at least one short-circuit ring between the at least two disks and is in fluidic connection with the at least one channel of the rotor laminated core and fluidly connects the at least one passageway on the lateral surface of the shaft to the at least one channel of the rotor laminated core.