Kabushiki Kaisha Toshiba

Yoshiaki Sakai

Masahiro Saito

Shoko Ito

Yomei Yoshioka

Daizo Saito

Hiroaki Okamoto

Kazuhiro Kitayama

A transition piecein an embodiment is provided with an inner ductthrough which a combustion gas is led to a turbine partand an outer ductthat is provided so as to cover an outer periphery of the inner ductand has a plurality of ejection holesto eject air onto an outer peripheral surface of the inner ductformed therein. It is structured such that a channel cross-sectional area of a cooling air channelthat is formed between the inner ductand the outer ductand through which the air ejected from the ejection holesflows gradually decreases at an air flow downstream side rather than the portion where the ejection holesare formed, and gradually increases from a throat portionhaving the minimized channel cross-sectional area to an air flow downstream side.

Transition piece between combustor liner and gas turbine

A damage-repairing method of a transition piece in an embodiment includes; an oxide removing step of removing an oxide on an outer surfaceof an inner ductof a transition piecehaving damage; a repair material placing step of placing a brazing repair materialon the outer surfaceof the inner ductso as to cover the damage; and a diffusion brazing step of diffusion heat treating the inner ductto repair the damage formed in the outer surface. The damage-repairing method of the transition piece includes: a pressurized heat treating step of, under high pressure, heat treating the inner duct; a surface finishing step of scraping off the brazing repair materialprojecting from the outer surface; and a non-pressurized heat treating step of solution heat treating and aging heat treating the inner ductunder non-pressure.

Damage-repairing method of transition piece and transition piece

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Yokohama, Japan

Yoshiaki Sakai