Ceramic-to-metal stator vane assembly
AssigneeAlliedSignal Inc.
InventorRichard W. Schultze
Life of this patent
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Abstract
A stator vane assembly for a gas turbine engine that includes a plurality of circumferentially spaced ceramic vanes, each of which has an inner and outer ceramic shroud, and a ceramic post extending from one of the shrouds, and a metallic platform having a plurality of circumferentially spaced sleeves. A tolerance ring is mounted in each of the sleeves and then the ceramic posts are pressed into the rings. The assembly is then ready to be mounted within the engine. A method for assembling these components to form the stator assembly is also described.
Claims5
A stator vane assembly for a gas turbine engine having a stationary casing circumscribing a rotating shaft, said stator vane assembly comprising:
- a plurality of circumferentially spaced ceramic vanes, each of said vanes having a first and second ceramic shroud, and having a ceramic post extending from said first shroud;
- a metallic platform having a plurality of circumferentially spaced sleeves, each of said sleeves are open at both ends and receiving one of said posts;
- a plurality of compliant members, each of said compliant members are tolerance rings and disposed between one of said ceramic posts and its corresponding sleeve;
- and
- metallic buttons placed in each of said sleeves to plug one of said open ends.
A method for mounting ceramic stator vanes in a gas turbine engine having a metallic casing circumscribing a metallic shaft, comprising the steps of:
- providing ceramic stator vanes having a ceramic first shroud, a ceramic second shroud, and a ceramic post extending from said first shroud;
- providing a metallic platform having a plurality of circumferentially spaced sleeves extending therethrough;
- placing a compressed tolerance ring in each of said sleeves;
- pressing said posts of said vanes into said tolerance rings;
- and
- plugging one end of said sleeves with a metallic button.
Dependencies are inferred from the claim text.