US 11,873,732 B2
Blade made of multiple materials
Rémi Philippe Guy Onfray, Moissy-Cramayel (FR); Dorian Alexandre Alban Bantwell, Moissy-Cramayel (FR); and Alix Thomas Bernard Lejeune, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/995,497
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Apr. 1, 2021, PCT No. PCT/FR2021/050573
§ 371(c)(1), (2) Date Oct. 5, 2022,
PCT Pub. No. WO2021/205098, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 2003604 (FR), filed on Apr. 9, 2020.
Prior Publication US 2023/0175402 A1, Jun. 8, 2023
Int. Cl. F01D 5/14 (2006.01); F01D 5/28 (2006.01)
CPC F01D 5/147 (2013.01) [F01D 5/282 (2013.01); F05D 2300/603 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A blade comprising:
a reinforced leading edge, a trailing edge, and extending between the leading edge and the trailing edge while being limited by a lower surface face and an upper surface face which are two main aerodynamic faces of the blade, opposite in a direction of the thickness of the blade and each extending from the leading edge to the trailing edge; the blade being formed of a first portion, made in one piece of a first material, made of a first end portion comprising the leading edge, of a second end portion comprising the trailing edge and of a core connecting the first end portion to the second end portion, the first end portion and the second end portion each comprising a strip of each of the main aerodynamic faces; of a second portion, extending between the first end portion and the second end portion and joined to a main face of the core, made of a second material lighter than the first material, and carrying a zone of a first one of the main aerodynamic faces between the strips of said first aerodynamic face belonging to each of the end portions; and of a third portion, joined to a second main face, opposite the first main face, of the core, carrying a zone of a second one of the main aerodynamic faces between the strips of said second aerodynamic face belonging to each of the end portions, and made of a material lighter than the first material; wherein the core has, over at least a portion of the height of the blade, an oblique extension in the direction of thickness, the second portion having a greater thickness adjacent the second end portion than adjacent the first end portion, and the third portion having a greater thickness adjacent the first end portion than adjacent the second end portion.