Cooling construction of transition piece of a gas turbine

F - Mech Eng,Light,Heat,Weapons – 23 – R

Patent

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Details

F23R 3/42 (2006.01) F01D 9/02 (2006.01) F02C 7/18 (2006.01)

Patent

CA 2496621

A plate spring 6 having a hook-shaped cross section from the lower part is installed in a neighborhood of one end "b" of an impingement-cooling plate 4. One end "c" on the lower side is fixed to a rib 1d by welding, while the other end "b" on the upper side is free, which makes it closely contact with the neighborhood of the other end "b" of the impingement-cooling plate 4 by elastic force thereof. This state makes it possible to seal a gap formed between the impingement-cooling plate 4 and a transition piece 1 on the side of a rib 1d, preventing thermal stress generated in the rib 1d, for example, from affecting the impingement-cooling plate 4.

L'invention concerne une structure de refroidissement de tuyère de turbine à gaz, comprenant un ressort (6) à lame en forme de crochet en section transversale disposé par en dessous près d'une extrémité (b) d'une plaque (4) de refroidissement de contact. L'extrémité inférieure (c) du ressort à lame est solidement fixée à une nervure (1d), et l'extrémité supérieure (d) de celui-ci est libérée pour venir en contact avec le dispositif (4) de refroidissement de contact près de l'autre extrémité (b) de celui-ci par une force élastique. L'espace formé entre la plaque (4) de refroidissement de contact et la tuyère (1) peut ainsi être protégé sur le côté de la nervure (1d) tout en évitant qu'une contrainte thermique générée, par exemple, dans la nervure (1d) affecte la plaque (4) de refroidissement de contact.

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