Ring seal system with reduced cooling requirements

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

Patent

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Details

F01D 11/02 (2006.01) F01D 11/08 (2006.01)

Patent

CA 2624425

Aspects of the invention are directed to systems for reducing the cooling requirements of a ring seal in a turbine engine. In one embodiment, the ring seal (54) can be made of a ceramic material, such as a ceramic matrix composite. The ceramic ring seal (54) can be connected to metal isolation rings (40, 42) by a plurality of pins (76, 78). The hot gas face (72) of the ring seal (54) can be coated with a thermal insulating material (74). In another embodiment, a ring seal (120) can be made of metal, but it can be operatively associated with a ceramic heat shield (122). The metal ring seal (120) can carry the mechanical loads imposed during engine operation, and the heat shield (122) can carry the thermal loads. By minimizing the amount of ring seal cooling, the ring seal systems according to aspects of the invention can result in improved engine performance and emissions

Certains aspects de l'invention concernent des systèmes de réduction des exigences de refroidissement d'un joint annulaire dans une turbine. Dans un mode de réalisation, le joint annulaire (54) peut être fabriqué en matériau céramique, comme un composite à matrice céramique. Le joint annulaire céramique (54) peut être connecté à des bagues d'isolation en métal (40, 42) par une pluralité de broches (76, 78). La face côté gaz chauds (72) du joint annulaire (54) peut être revêtue d'un matériau isolant thermique (74). Dans un autre mode de réalisation, un joint annulaire (120) peut être fabriqué en métal mais il peut être associé fonctionnellement à un écran thermique en céramique (122). Le joint annulaire métallique (120) peut supporter les charges mécaniques imposées au cours du fonctionnement de la turbine, et l'écran thermique (122) peut supporter les charges thermiques. En minimisant la quantité de refroidissement du joint annulaire, les systèmes de joint annulaire selon certains aspects de l'invention peuvent donner lieu à des performances et des taux d'émission améliorés de la turbine.

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