Assembly for thermal shielding of low pressure turbine
A thermal shield is described for a gas turbine engine for thermally shielding an outer casing of the engine from leakage of high temperature gases into an annular space between an inner surface of the outer casing and an outer annular surface of a nozzle guide vane platform, respective axial ends of the annular space being defined by radially inward depending flanges of the casing, a plurality of vane platforms being joined in an abutting end-to-end relationship to form the outer annular surface, the vane platforms having radially outwardly extending raised surfaces radially supporting the thermal shield within the annular space, the thermal shield comprising: an annular inner liner and a radially spaced outer liner axially aligned with the inner liner; metallic insulation means comprising a plurality of interconnected honeycomb cells substantially filling the space between the inner and outer liners for reducing airflow between the inner and outer liners; and means for fixedly coupling the inner liner to the outer liner. A thermal shield for a gas turbine engine for thermally shielding an outer casing of the engine from leakage of high temperature gases into an annular space adjacent an inner surface of the outer casing, an outer liner comprising an annular sheet metal ring having an axially aft edge bent downwardly and forwardly to conform to a generally forward facing U-shape and having an axially forward edge bent downwardly and upwardly to conform to a generally upwardly facing U-shape, the upwardly facing U-shape acting as an axially compressible spring member whereby the outer liner is retained in the annular space within the casing by reacting the aft edge of the outer liner against one axial end of the annular space by compressing the spring member against another end of the annular space; and an inner liner coupled to the outer liner so as to define a closed annular space between the inner and outer liners.
- Assignee:
- General Electric Co., Cincinnati, OH (United States)
- Patent Number(s):
- US 5238365; A
- Application Number:
- PPN: US 7-727208
- OSTI ID:
- 6053739
- Resource Relation:
- Patent File Date: 9 Jul 1991
- Country of Publication:
- United States
- Language:
- English
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