Btt probe fixing apparatus and gas turbine including same

A gas turbine comprising:

• a compressor configured to draw in and compress external air;
• a combustor configured to mix fuel with air compressed in the compressor and to combust a mixture of the fuel and the compressed air;
• a turbine configured to generate power by using a combustion gas discharged from the combustor;
• and
• a Blade Tip Timing (BTT) probe fixing apparatus for fixing and maintaining a BTT probe that monitors a blade in real time,
• wherein the BTT probe fixing apparatus comprises:
• a cooling sleeve inserted into a fixing hole formed in a vane carrier, the cooling sleeve accommodating the BTT probe measuring vibration of the blade in an inner portion of the cooling sleeve, and the cooling sleeve having a lower end thereof fastened to the fixing hole;
• and
• a probe holder having a lower end thereof fastened to a penetration hole formed in a casing and having an inner portion where the cooling sleeve penetrates therethrough and is inserted thereinto such that the cooling sleeve is capable of being slid in the probe holder, the probe holder being configured to move according to thermal expansion of the casing while maintaining the cooling sleeve and the BTT probe in a fixed position relative to the vane carrier.