Power transmission for a gas turbine

The power transmission comprises a compressor rotor shaft (100), a turbine rotor shaft (200), and a frictional coupling device (320) connected by the compressor and turbine rotor shafts. The coupling device: is formed so that the frictional connection is given even if the rotor shafts are shifted from each other; comprises a passage (420) in the axial direction of the rotor shafts for cooling air, a hirth coupling consisting of a ring gear cylinder as frictional connection, a corresponding sprocket bushing, and a pin coupling comprising axially extended and interconnected pins. The power transmission comprises a compressor rotor shaft (100), a turbine rotor shaft (200), and a frictional coupling device (320) connected by the compressor and turbine rotor shafts. The coupling device: is formed so that the frictional connection is given even if the rotor shafts are shifted from each other; comprises a passage (420) in the axial direction of the rotor shafts for cooling air, a hirth coupling consisting of a ring gear cylinder as frictional connection, a corresponding sprocket bushing, a pin coupling comprising axially extended and interconnected pins and bushing holes (322). The passage: is present in the ring gear cylinder, where a hollow pin is executed as the passage; and comprises a telescopic pipe having a first telescopic part in the compressor rotor shaft, where the first telescopic part corresponds to a second telescopic part on the turbine rotor shaft. The frictional connection and the passage are separated. The telescopic pipe is arranged perpendicular to an axial direction spatially offset to the frictional connection. Independent claims are included for: (1) a gas turbine with a compressor; (2) a compressor rotor shaft; and (3) a turbine rotor shaft.