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US 4,063,847 AGranted
Gas turbine engine casing
AssigneeRolls-Royce (1971) Limited
InventorRoy Simmons
Life of this patent
Estimating the term…
Abstract
A composite casing for a gas turbine engine comprises an inner wall which may be an integrally formed drum or a plurality of separate rings, and which is overwound with carbon fibers in a cross-weave and resin bonded to the inner wall. Honeycomb material is used to increase the outside diameter of the inner wall to provide continuous surface over which to wind the fibers.
Claims5
A gas turbine engine compressor comprising in combination a hollow drum of circular cross-section and a plurality of rows of radially inwardly extending stator vanes disposed in annular recesses formed in the drum and wherein the drum comprises:
- an inner wall of fiber-reinforced composite material, said inner wall having axially successive portions of relatively smaller and larger diameters respectively thereby defining a plurality of alternately radially inwardly facing and radially outwardly facing annular recesses, the radially inwardly facing recesses defining means for receiving said stator vanes,
- an intermediate layer of relatively lightweight filler material extending over the outer surface of said inner wall at least in the region of the radially outwardly facing recesses thereof, said intermediate layer at least partially filling the recesses and thereby eliminating sharp changes in diameter of said outer surface,
- and a second wall comprising carbon fiber material continuously wound around said inner wall and said intermediate layer.
Dependencies are inferred from the claim text.