300MW reaction type single-cylinder shaft row one-time reheating air turbine

The utility model discloses a 300MW reaction type single-cylinder shaft row one-time reheating air turbine, and belongs to the technical field of air turbines. The air turbine device solves the problem that an existing air turbine device cannot meet the further commercialization requirement of a compressed air energy storage system. A front bearing box and a rear bearing box are installed on the two sides of a high-low pressure outer cylinder respectively, a high-pressure inner cylinder is arranged in the high-low pressure outer cylinder, a high-low pressure integral forging rotor is rotationally arranged in the high-low pressure inner cylinder, one end of the high-low pressure integral forging rotor is connected with the front bearing box in a matched mode, and the other end of the high-low pressure integral forging rotor is connected with the rear bearing box in a matched mode. The rear bearing box is arranged in the exhaust guide box, the exhaust guide box is connected with the high-low pressure outer cyli