Apparatus for adjusting clearance and gas turbine including the same

A clearance adjusting apparatus disposed in front of a compressor of a gas turbine to axially move a compressor disk back and forth to adjust a tip clearance of the compressor, the clearance adjusting apparatus comprising:

• a hollow fastening part disposed in front of a compressor casing;
• a shaft disposed in the fastening part and coupled to a front side of a compressor disk;
• an adjusting part disposed between the fastening part and the shaft to axially move the shaft back and forth to adjust the tip clearance;
• and
• a biasing part disposed on the fastening part to bias the adjusting part back and forth to adjust a position of the adjusting part and the shaft,
• wherein a protruding member is formed to protrude radially inward from an inner circumferential surface of a front side of the compressor casing, wherein the fastening part comprises:
• a fastening housing installed around an outer circumferential surface of the adjusting part;
• a fastening member disposed on a rear end of the fastening housing to be fixed to the protruding member;
• and
• a fastening step disposed on an inner circumferential surface of the fastening housing,
• wherein the biasing part is disposed on the fastening step to bias the adjusting part back and forth so that the adjusting part and the shaft are moved back and forth,
• wherein the fastening part further includes a reinforcing housing disposed between the fastening housing and the adjusting part, and a reinforcing protrusion protruding from an outer circumferential surface of the reinforcing housing to be inserted into an inner circumferential surface of the fastening housing, and
• the fastening step is formed to protrude from an inner circumferential surface of the reinforcing housing.

A gas turbine comprising:

• a compressor including a compressor casing along which an externally introduced au flows, a compressor stator coupled to an inner circumferential surface of the compressor casing and having compressor vanes disposed in a multi-stage along a flow direction of the au, and a compressor rotor having a compressor disk disposed inside the compressor casing and compressor blades coupled to an outer circumferential surface of the compressor disk such that the compressor blades are disposed between the compressor vanes to rotate;
• a combustor configured to mix the compressed air supplied from the compressor with fuel and combust the air-fuel mixture;
• a turbine including a turbine stator through which the combustion gas supplied from the combustor flows and a turbine rotor disposed in the turbine stator to rotate with the combustion gas flowing therethrough;
• and
• a clearance adjusting apparatus disposed in front of the compressor to axially move the compressor disk back and forth to adjust a tip clearance formed between the compressor blade and the compressor casing, the clearance adjusting apparatus comprising:
• a hollow fastening part disposed in front of the compressor casing;
• a shaft disposed in the fastening part and coupled to a front side of the compressor disk;
• an adjusting part disposed between the fastening part and the shaft
• to axially move the shaft back and forth to adjust the tip clearance;
• and
• a biasing part disposed on the fastening part to bias the adjusting part back and forth to adjust a position of the adjusting part and the shaft,
• wherein a protruding member is formed to protrude radially inward from an inner circumferential surface of a front side of the compressor casing, wherein the fastening part comprises:
• a fastening housing installed around an outer circumferential surface of the adjusting part;
• a fastening member disposed on a rear end of the fastening housing to be fixed to the protruding member;
• and
• a fastening step disposed on an inner circumferential surface of the fastening housing,
• wherein the biasing part is disposed on the fastening step to bias the adjusting part back and forth so that the adjusting part and the shaft are moved back and forth.