BLADE COMPRISING A STRUCTURE MADE OF COMPOSITE MATERIAL, AND ASSOCIATED MANUFACTURING METHOD

• Main Author: JOUDON, Vincent
• Format: Patent
• Language: English; French
• Published: 09.09.2022
• Subjects: AEROPLANES; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; AIRCRAFT; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT; AVIATION; BLASTING; COSMONAUTICS; ENGINE PLANTS IN GENERAL; EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; HEATING; HELICOPTERS; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PARACHUTES; PERFORMING OPERATIONS; PRODUCING MECHANICAL POWER; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STEAM ENGINES; TRANSPORTING; WEAPONS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention relates to a blade (7) comprising: a structure of aerodynamic profile (20) comprising two mutually opposite skins (22); and a spar (21) comprising a fibrous reinforcement obtained by three-dimensional weaving and densified by the matrix, the spar (21) comprising a blade root portion (24) extending outside the structure of aerodynamic profile (20) and an airfoil portion (25) arranged inside the structure of aerodynamic profile (20) between the two skins (22). Moreover, within the blade root portion (24), the fibrous reinforcement (26) of the spar (21) comprises a non-debound region (27) and at least two debound regions (28) extending radially from the non-debound region (27) so as to form at least four separate branches (29). La présente invention concerne une aube (7) comprenant : une structure à profil aérodynamique (20) comprenant deux peaux (22) en vis-à-vis; et un longeron (21) comprenant un renfort fibreux obtenu par tissage tridimensionnel et densifié par la matrice, ledit longeron (21) comprenant une partie de pied d'aube (24) s'étendant à l'extérieur de la structure à profil aérodynamique (20) et une partie de pale (25) disposée à l'intérieur de la structure à profil aérodynamique (20) entre les deux peaux (22). De plus, au sein de la partie de pied d'aube (24), le renfort fibreux (26) du longeron (21) comprend une zone non déliée (27) et au moins deux zones déliées (28) s'étendant radialement depuis la zone non déliée (27) de sorte à former au moins quatre branches (29) distinctes.