Fan blade comprising a thin shield and a stiffener
AssigneeSafran Aircraft Engines
InventorsThomas Alain De Gaillard, Benjamin Bulot, Eddy Keomorakott Souryavongsa
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Abstract
The invention relates to a fan blade (1) comprising: —an aerofoil (8) made of a composite material comprising a fibrous reinforcement densified by a polymer matrix, a leading edge (4) and a trailing edge (5), and —a structural shield (10) fitted and attached to the leading edge (4) or the training edge (5), and —at least one stiffener (20) formed integrally and in one piece with the structural shield (10), said stiffener (20) extending in a cavity (15) formed between the shield (10) and the leading edge (4) or the trailing edge (5) so as to increase a stiffness of the blade (1).
Claims21
A blade of a rotating part of a turbomachine comprising:
- an airfoil made of a composite material comprising a fibrous reinforcement embedded in a polymer matrix, the airfoil comprising a leading edge and a trailing edge;
- a structural shield applied and attached to the leading edge or the trailing edge;
- and
- at least one stiffener formed integrally and in a single piece with the structural shield, the at least one stiffener extending into a cavity formed between the structural shield and one of the leading edge or the trailing edge and contacting the leading edge or the trailing edge so as to increase a stiffness of the blade,
- wherein the blade has an aerodynamic surface, the aerodynamic surface having a main extension direction defining a longitudinal axis of the blade which is substantially radial to an axis of revolution of the rotating part and a height corresponding to a distance between a lower limit of the aerodynamic surface and a tip of the blade, the at least one stiffener extending only from the tip of the blade over at most 70% of the height of said aerodynamic surface, such that the blade does not comprise a stiffener from a bottom of the blade over at least 30% of the height.
A blade of a rotating part of a turbomachine comprising:
- an airfoil made of a composite material comprising a fibrous reinforcement embedded in a polymer matrix, the airfoil comprising a leading edge and a trailing edge;
- a structural shield applied and attached to the leading edge or the trailing edge;
- and
- at least one stiffener formed integrally and in a single piece with the structural shield, the at least one stiffener extending into a cavity formed between the structural shield and one of the leading edge or the trailing edge and contacting the leading edge or the trailing edge so as to increase a stiffness of the blade,
- wherein the at least one stiffener comprises a plurality of walls forming at least one bellows, the plurality of walls arranged adjacent to each other in a direction that is perpendicular to the leading edge or the trailing edge to which the structural shield is applied and attached, adjacent walls of the plurality of walls having a gap located therebetween.
Dependencies are inferred from the claim text.