Turbine ring assembly

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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Details

F01D 25/24 (2006.01) F01D 9/04 (2006.01) F01D 11/08 (2006.01)

Patent

CA 2750938

The invention relates to a turbine ring assembly that includes a plurality of ring sectors (10) made of a single piece and of a composite material including a ceramic matrix and a ring carrier structure, each ring sector having a first portion (12) defining an annular base with an inner surface defining the inner surface of the turbine ring and an outer surface from which extend two tab portions (14, 16) having the ends thereof engaged into housings of the ring carrier structure. The ring sectors (10) have a substantially p-shaped cross section and the ends (14a, 16a) of the tabs (14, 16) are maintained without radial clearance by the ring carrier structure. Preferably, the tabs (14, 16) have at the middle section thereof a free length at least equal to three times their average width.

L'ensemble d'anneau de turbine comprend une pluralité de secteurs d'anneau (10) en une seule pièce en matériau composite à matrice céramique et une structure de support d'anneau, chaque secteur d'anneau ayant une première partie (12) formant base annulaire avec une face interne définissant la face interne de l'anneau de turbine et une face externe à partir de laquelle s'étendent deux parties formant pattes (14, 16) dont les extrémités sont engagées dans des logements de la structure de support d'anneau. Les secteurs d'anneau (10) sont à section sensiblement en forme de .pi. et les extrémités (14a, 16a) des pattes (14, 16) sont maintenues sans jeu radial par la structure de support d'anneau. De préférence, les pattes (14, 16) ont, en section méridienne, une longueur libre au moins égale à 3 fois leur largeur moyenne.

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