Retainer for gas turbine blade, turbine unit and gas turbine using the same

A turbine unit comprising:

• a casing configured to form a gas flow space communicating with each of a gas inlet and a gas outlet formed at opposite sides of the casing, the casing having an inner wall on which a fixed blade is disposed;
• a torque tube rotatably mounted in the gas flow space inside the casing;
• a rotor coupled to the torque tube and rotating together with the torque tube;
• a rotating blade mounted on the rotor;
• a retainer comprising
• a retainer frame disposed at one side of the rotating blade and configured to form an inside chamber through which cooled air is introduced between the retainer frame and the rotating blade, the inside chamber formed by a pair of circumferentially extending sides and a pair of radially extending sides,
• a barrier wall formed between the retainer frame and the rotating blade and configured to divide the inside chamber into a plurality of cooling chambers, the barrier wall comprising a plurality of barrier wall members spaced apart from one another in the radial direction of the rotor, and
• a fixing unit that is disposed at one side of the retainer frame and includes a body and a flange extending from the body in a radial direction of the rotor to fix the retainer frame to the rotor,
• wherein each barrier wall member of the barrier wall is connected to the pair of radially extending sides of the retainer.

A gas turbine comprising:

• a compressor unit configured to compress air supplied from the outside;
• a combustor unit configured to combust the compressed air supplied from the compressor unit and a fuel so as to generate an operating gas;
• and
• a turbine unit comprising
• a casing configured to form a gas flow space in which the operating gas flows, the gas flow spacing communicating with each of a gas inlet and a gas outlet formed at opposite ends of the casing, the casing having an inner wall on which a fixed blade is disposed,
• a torque tube rotatably mounted in the gas flow space inside the casing,
• a rotor coupled to the torque tube and rotating together with the torque tube,
• a rotating blade mounted on the rotor,
• a retainer comprising
• a retainer frame disposed at one side of the rotating blade and configured to form an inside chamber through which cooled air is introduced between the retainer frame and the rotating blade, the inside chamber formed by a pair of circumferentially extending sides and a pair of radially extending sides,
• a barrier wall formed between the retainer frame and the rotating blade and configured to divide the inside chamber into a plurality of cooling chambers, the barrier wall comprising a plurality of barrier wall members spaced apart from one another in the radial direction of the rotor, and
• a fixing unit that is disposed at one side of the retainer frame and includes a body and a flange extending from the body in a radial direction of the rotor to fix the retainer frame to the rotor,
• wherein each barrier wall member of the barrier wall is connected to the pair of radially extending sides of the retainer.