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US 2015/0308290 A1Published application
Fan containment case
AssigneeROLLS-ROYCE plc
InventorMatthew J. Kappes
Life of this patent
Estimating the term…
Abstract
A fan case for use in a gas turbine engine of an aircraft includes an outer shroud and a liner extending along the outer shroud. The fan case provides a protective band that blocks fan blades from being thrown out of the fan case in case of a blade-off event in which a fan blade is released during operation of the gas turbine engine.
Claims20
A fan case adapted to extend around blades of a fan rotor included in a gas turbine engine, the fan case comprising
- an annular outer shroud arranged around a central axis and extending axially between a front and a back of the fan case, the annular outer shroud having an outer radial surface facing away from the central axis and an inner radial surface facing toward the central axis, and
- a composite liner arranged along the inner radial surface of the annular outer shroud, the composite liner including an outer skin arranged in confronting relation with the inner radial surface of the annular outer shroud, an inner skin bonded to the outer skin adjacent to the front of the fan case to form an axially-forward section of the composite liner and bonded to the outer skin adjacent to the back of the fan case to form an axially-rearward section of the composite liner, and a liner-filler body arranged radially between the outer skin and the inner skin and axially between the axially-forward section and the axially-rearward section to form a force-distribution band between the front and the back of the fan case, the force-distribution band adapted to circumferentially distribute forces from a blade released outwardly from a fan rotor rotating in the fan case so that the forces are not point loaded onto the annular outer shroud when the released blade contacts the surrounding fan case.
A fan case adapted to extend around blades of a fan rotor, the fan case comprising
- an annular outer shroud arranged around a central axis and extending axially between a front and a back of the fan case, the annular outer shroud having an outer radial surface facing away from the central axis and an inner radial surface facing toward the central axis,
- a composite liner arranged along the inner radial surface of the annular outer shroud, the composite liner including an outer skin arranged in confronting relation with the inner radial surface of the annular outer shroud, an inner skin spaced apart from the inner radial surface of the annular outer shroud, and a liner-filler body arranged between the outer skin and the inner skin along a portion of the annular outer shroud between the front and the back of the fan case, and
- a plurality of fasteners that extend through the annular outer shroud from the outer radial surface of the annular outer shroud into the composite liner to secure the composite liner to the annular outer shroud.
A fan case adapted to extend around blades of a fan rotor, the fan case comprising
- an annular outer shroud arranged around a central axis, the annular outer shroud having an outer radial surface facing away from the central axis and an inner radial surface facing toward the central axis, and
- a composite inner skin arranged along the inner radial surface of the annular outer shroud, the composite inner skin including an outer layer made of reinforcing fibers suspended in a matrix material, an inner layer made of reinforcing fibers suspended in a matrix material, and an intermediate layer arranged between the outer layer and the inner layer made of reinforcing fibers not suspended in a matrix material.
Dependencies are inferred from the claim text.