Machine for depressurizing or compressing gaseous media

A machine for depressurizing or compressing substantially gaseous media, comprising:

• a machine casing;
• at least one screw rotor, which is arranged in a screw rotor bore in the machine casing, extends between a low-pressure side and a high-pressure side of the screw rotor bore, cooperates with the substantially gaseous medium and, by rotating about a screw axis, conveys the substantially gaseous medium either from the low-pressure side to the high-pressure side, compressing it, or from the high-pressure side to the low-pressure side, expanding it, and is mounted on both sides in the machine casing by means of a respective bearing set, each bearing set has at least one radial bearing and at least one of the bearing sets has at least one axially acting bearing that supports the at least one screw rotor axially to counter an axial displacing movement from its operating position in the direction of the low-pressure side;
• and
• a motor/generator unit that is coupled or couplable to the at least one screw rotor, the at least one screw rotor is provided with at least one axial support bearing that axially supports the at least one screw rotor such that a high-pressure end face of the at least one screw rotor is guided, without making contact, to an end wall, which faces this end face, of the machine casing that receives the at least one screw rotor;
• wherein the at least one support bearing is arranged on a receiving pin.