Turbine vane platform sealing assembly, and turbine vane and gas turbine including same

A turbine vane which is fixedly mounted within a housing by a turbine vane outer platform coupled to an outer end thereof and a turbine vane inner platform coupled to an inner end thereof, wherein at least one of the turbine vane outer platform and the turbine vane inner platform comprises a turbine vane platform sealing assembly, wherein the turbine vane platform sealing assembly comprises:

• a first sealing member inserted into a first groove formed in a turbine vane platform in a first direction, the first sealing member extending in the first direction;
• a second sealing member inserted into a second groove formed in a second direction intersecting the first direction of the turbine vane platform, with an end part of the second sealing member being in contact with an upper surface of the first sealing member, and a portion of a third sealing member being inserted into one side surface of the second sealing member;
• and
• the third sealing member having a portion formed by extending in the first direction and a remaining portion formed by bending in the second direction at a bend line at which the first sealing member and the second sealing member contact, with a third directional width of the third sealing member being greater than a third directional width of each of the first sealing member and the second sealing member.

A gas turbine comprising:

• a compressor configured to suck and compress external air;
• a combustor configured to mix fuel with air compressed in the compressor and combust a mixture of the fuel and the compressed air;
• and
• a turbine having turbine blades and turbine vanes mounted therein, the turbine blades being rotated by combustion gas discharged from the combustor,
• wherein each of the turbine vanes is fixedly mounted within a housing by a turbine vane outer platform coupled to an outer end thereof and a turbine vane inner platform coupled to an inner end thereof, wherein at least one of the turbine vane outer platform and the turbine vane inner platform comprises a turbine vane platform sealing assembly,
• wherein the turbine vane platform sealing assembly comprises:
• a first sealing member inserted into a first groove formed in a turbine vane platform in a first direction, the first sealing member extending in the first direction;
• a second sealing member inserted into a second groove formed in a second direction intersecting the first direction of the turbine vane platform, with an end part of the second sealing member being in contact with an upper surface of the first sealing member, and a portion of a third sealing member being inserted into one side surface of the second sealing member;
• and
• the third sealing member having a portion formed by extending in the first direction and a remaining portion formed by bending in the second direction at a bend line at which the first sealing member and the second sealing member contact, with a third directional width of the third sealing member being greater than a third directional width of each of the first sealing member and the second sealing member.