Fan blade dovetail with compliant layer
AssigneeHamilton Sundstrand Corporation
InventorsPeter D. Ventura, Carl Brian Klinetob
Life of this patent
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Abstract
A fan blade includes an airfoil and a dovetail at a radially inner end of the airfoil. The dovetail extends between first and second axial ends, and has outer circumferential faces. The dovetail is formed of relatively rigid composite material. Compliant material is placed on each outer circumferential face of the dovetail. The compliant material is less rigid than the composite material for forming the dovetail. In a second embodiment, the compliant layer may be positioned within the disk slots in a disk, such that the compliant layer will come in contact with circumferentially outer faces of the dovetail.
Claims15
A fan blade comprising:
- an airfoil, and a dovetail at a radially inner end of said airfoil, said dovetail extending between first and second axial ends, and having outer circumferential faces;
- said dovetail is formed of relatively rigid composite material;
- and
- compliant material placed on each outer circumferential face of said dovetail, said compliant material being less rigid than said composite material for forming said dovetail.
A fan section for a gas turbine engine comprising:
- a rotor disk having a plurality of circumferentially spaced disk slots;
- blades received within said disk slots, said blades having an airfoil extending radially outwardly of said rotor disk, and a dovetail received within said disk slots, with contact surfaces between said disk slots and said dovetails, said dovetails being formed of a first relatively rigid composite material, and said rotor disk being formed of a second relatively rigid material;
- and
- intermediate compliant material at said contact surfaces between said dovetails and said disk slots, said compliant material being less rigid than said first or second rigid materials.
Dependencies are inferred from the claim text.