US 2025/0326482 A1 · BLADE COMPRISING A STRUCTURE MADE OF COMPOSITE MATERIAL, AND ASSOCIATED MANUFACTURING METHOD

Abstract

The invention relates to a blade comprising, a blade body having an aerodynamic profile comprising a first fibrous reinforcement obtained by three-dimensional weaving and comprising a first matrix in which the first fibrous reinforcement is embedded, the blade body part comprising a cavity formed by a disconnection of the first fibrous reinforcement, a blade root intended to be connected to a mechanism for the variable adjustment of the blade, and a spar comprising a core made of composite material and two metal casings attached to the core on either side of the core. The core comprises a first part that extends inside the cavity of the blade body and a second part that forms the blade root. The two metal casings which are attached to the core made of composite material extend over the second part and continue to extend over the first part inside the cavity of the blade body.

Claims18

Dependent claims

A blade comprising:

an airfoil with an aerodynamic profile, the airfoil comprising a first fibrous reinforcement obtained by three-dimensional weaving and a first matrix in which the first fibrous reinforcement is embedded, a part of the airfoil with the aerodynamic profile comprising a cavity formed by a debinding of the first fibrous reinforcement,
a blade root intended to be linked to a variable pitch mechanism of the blade, and
a spar comprising a core of composite material and two metallic shells attached to the core of composite material, on either side of the core of composite material, the core of composite material comprising a first part extending inside the cavity of the airfoil with the aerodynamic profile, and a second part forming the blade root,
the two metallic shells attached to the core of composite material extending over the second part and continuing on the first part inside the cavity of the airfoil with the aerodynamic profile.

1 more element

A method for manufacturing a blade comprising successive steps of:

producing a core of composite material comprising a first part and a second part,
attaching two metallic shells to the core of composite material, so that each of the two metallic shells extends over the second part of the core of composite material and continue on the first part,
producing a fibrous blank by three-dimensional weaving of fiber strands, the fibrous blank having a debinding forming a cavity,
forming the fibrous blank to obtain a preform with an aerodynamic profile, wherein forming the fibrous blank comprises inserting the first part inside the cavity,
injecting a resin into a mold containing the first fibrous blank and the first part to obtain a blade comprising an airfoil with the aerodynamic profile comprising a fibrous reinforcement and a matrix in which the fibrous reinforcement is embedded, the first part extending inside the cavity of the airfoil with the aerodynamic profile, and the second part of the core of composite material) forming a blade root of the blade.

2 more elements

Dependencies are inferred from the claim text.

Blade comprising a structure made of composite material, and associated manufacturing method

Life of this patent

Blade comprising a structure made of composite material, and associated manufacturing method

Life of this patent

Abstract

Claims18