| 摘要 |
PROBLEM TO BE SOLVED: To improve the cooling effect of a tail pipe seal for connecting the outlet of the tail pipe to a gas path and reduce the amount of cooling air in a tail pipe seal structure of a gas turbine. SOLUTION: On part of a tail pipe seal 1 is provided with a U-shaped groove 1a to which the flange 86a of a tail pipe outlet 86 is fitted, and the other part of the tail pipe seal is provided with a U-shaped groove 1b to which the flange end part 103a of a gas path side is fitted to form the seal of a connecting part. In the tail pipe seal 1, a cooling hole 1c is formed at the same position as in the prior art to blow off cooling air 91 into a gas path inlet and cool the circumference of the hole 1c of the tail pipe seal. Further, an inclined cooling hole 1d is added to run off cooling air 92 and cool the gas path side of the groove 1b through a film. Thus, the differential thermal expansion between the groove 1b and the flange end part is decreased, the abrasion of this part is reduced and the reliability of the seal is improved. |
