Turbine Shroud with Spline Seal

Abstract

A turbine shroud assembly comprises a honeycomb rub strip, a metallic backsheet disposed along an upper edge of said honeycomb seal structure, a shroud frame having a first rail and a second rail disposed at lateral edges of said metallic backsheet, a first support and a second support connected to the first rail and the second rail, a spline extending axially in the first rail and the second rail along laterally outer surfaces of the first rail and the second rail and, a spline seal having a first edge and a second opposite edge, the first edge disposed in each of the spline grooves and the second opposite edge being capable of positioning in an adjacent shroud assembly.

What is claimed is: 
     
         1 . A turbine shroud assembly comprising:
 a honeycomb rub strip;   a metallic backsheet disposed along an upper edge of said honeycomb seal structure;   a shroud frame having a first rail and a second rail disposed at lateral edges of said metallic backsheet;   a first support and a second support connected to said first rail and said second rail;   a spline extending axially in said first rail and said second rail along laterally outer surfaces of said first rail and said second rail; and,   a spline seal having a first edge and a second opposite edge, said first edge disposed in each of said spline grooves and said second opposite edge being capable of positioning in an adjacent shroud assembly.   
     
     
         2 . The turbine shroud assembly of  claim 1 , said rails being a cast material. 
     
     
         3 . The turbine shroud assembly of  claim 1 , said rails being forged. 
     
     
         4 . The turbine shroud assembly of  claim 1 , said rails being plate material. 
     
     
         5 . The turbine shroud assembly of  claim 1 , said supports being hook shaped. 
     
     
         6 . The turbine shroud assembly of  claim 1 , said hooks being L-shaped. 
     
     
         7 . The turbine shroud assembly of  claim 1 , at least one of said supports being an overhang. 
     
     
         8 . The turbine shroud assembly of  claim 1 , said supports being cast and integrally formed with said first and second rails. 
     
     
         9 . The turbine shroud assembly of  claim 1 , said supports being formed from sheet metal. 
     
     
         10 . The turbine shroud assembly of  claim 1 , said backsheet extending aft beyond said second support. 
     
     
         11 . The turbine shroud assembly of  claim 1 , at least a portion of said backsheet extending circumferentially beyond said first and second rails. 
     
     
         12 . A turbine shroud assembly, comprising:
 a shroud frame having a first rail and a second rail, said first rail and second rails extending in an axial direction;   a first support and a second support extending between said first rail and said second rail in a circumferential direction;   a backsheet disposed along a lower surface of said shroud frame;   a honeycomb rub strip disposed on a lower surface of said backsheet;   a spline disposed along an outer surface of said first rail and said second rail;   a spline seal disposed in said spline to inhibit radial air leakage between adjacent assemblies.   
     
     
         13 . The turbine shroud assembly of  claim 12 , said backsheet extending from said first support to said second support. 
     
     
         14 . The turbine shroud assembly of  claim 12 , said backsheet extending beyond said second support. 
     
     
         15 . The turbine shroud assembly of  claim 12 , said first and second rails extending aft beyond said backsheet. 
     
     
         16 . The turbine shroud assembly of  claim 15 , said spline extending beyond said second support. 
     
     
         17 . The turbine shroud assembly of  claim 15  further comprising a second spline disposed on said rails, aft of said second support.