Gas turbine generator

A gas turbine generator, comprising:

• a turbine housing defining a compressor chamber and a turbine chamber arranged in an axial direction;
• a generator housing which is coupled to one end portion of the turbine housing to be detachable in the axial direction and defines a rotor chamber;
• a rotary shaft integrally including a first shaft portion extending in the axial direction inside the turbine housing and a second shaft portion extending in the axial direction inside the generator housing, the first shaft portion and the second shaft portion being located on a same axis;
• a hollow shaft provided with a hollow part which extends in the axial direction and in which the second shaft portion is inserted, the hollow shaft being fitted on an outer circumference of the second shaft portion to be slidable in the axial direction;
• a first bearing rotatably supporting the first shaft portion in the turbine housing;
• a second bearing and a third bearing rotatably supporting the hollow shaft in the generator housing;
• a compressor wheel coupled to the first shaft portion in the compressor chamber to be torque-transmittable;
• a turbine wheel coupled to the first shaft portion in the turbine chamber to be torque-transmittable;
• a combustor provided in the turbine housing;
• a generator stator having a cylindrical shape and fixed in the generator housing;
• a generator rotor coupled to the hollow shaft to be torque-transmittable and positioned inside the generator stator;
• and
• a first fixing member detachably fixed to an end portion of the second shaft portion opposite from the first shaft portion,
• wherein the hollow shaft and the rotary shaft have opposing end surfaces facing each other, and
• a movement of the hollow shaft in the axial direction with respect to the rotary shaft is restrained by the first fixing member and contact between the opposing end surfaces.