A turbine ring assembly for gas turbine

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

Patent

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Details

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

Patent

CA 2679093

A turbine ring assembly for a gas turbine comprises a split ring (10) in a single piece of composite ceramic matrix material (CMC), a wedge-shaped part (20) made of CMC with the sides in contact with the ends of the ring, at both sides of the split, for closing the ring, and an annular metallic support structure (40) encircling the CMC ring and in contact with the latter over the greater part of the contour thereof, the CMC ring being fitted with preconstraint in the metallic structure, at least one element (26) exerting an elastic recoil force on the wedge-shaped part in order to keep the latter in contact with the ends of the CMC ring when the split opens under the effect of a differential dilation between the annular metallic structure and the CMC ring, and at least one element for locking for the CMC in rotation around its axis.

Un ensemble d'anneau de turbine d'une turbine à gaz comprend un anneau fendu (10) en une seule pièce en matériau composite à matrice céramique (CMC), une pièce (20) en forme de coin en CMC ayant des flancs en contact avec les extrémités de l'anneau, de part et d'autre de la fente, pour fermer l'anneau, et une structure métallique annulaire de support (40) encerclant l'anneau en CMC au contact de celui- ci sur la plus grande partie de son contour, l'anneau en CMC étant monté avec précontrainte dans la structure métallique, au moins un élément (26) exerçant sur la pièce en forme de coin une force de rappel élastique pour maintenir celle-ci en contact avec les extrémités de l'anneau en CMC lorsque la fente s'ouvre sous l'effet d'une dilatation différentielle entre la structure métallique annulaire et l'anneau en CMC, et au moins un élément de blocage de l'anneau en CMC en rotation autour de son axe.

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