Wind turbine blade and method of manufacturing thereof

B - Operations – Transporting – 64 – C

Patent

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B64C 11/06 (2006.01) F03D 1/06 (2006.01)

Patent

CA 2526407

Method of manufacturing a blade root of a wind turbine blade and wind turbine blade having an aerodynamically designed blade portion and a blade root adapted for releasable attachment to a hub of a wind turbine, said blade root being of laminated construction and comprising a plurality of fully bonded bushings (4) extending largely in the longitudinal direction of the blade, which bushings (4) are provided with an internal thread (5) for mounting bolts for releasable attachment to the hub, wherein the bushings (4) comprise a first portion (6) and an extension portion (7) having gradually increased flexibility in the direction away from the first portion (6) to provide a light blade of high strength.

L'invention concerne, d'une part, un procédé de fabrication d'une emplanture d'une pale d'aérogénérateur et, d'autre part, une pale d'aérogénérateur possédant une partie aérodynamique et une emplanture conçue pour se fixer de manière amovible à un moyeu d'un aérogénérateur. Ladite emplanture de pale possède une construction stratifiée et comprend une pluralité de douilles entièrement liées (4) s'étendant en grande partie dans le sens longitudinal de la pale. Ces douilles (4) sont pourvues d'un fil interne (5) de manière à monter des boulons en vue d'une fixation amovible sur le moyeu. Lesdites douilles (4) comportent un première partie (6) et une partie d'extension (7) possédant un flexibilité graduellement accrue dans le sens partant de la première partie (6) pour engendrer une pale légère de résistance élevée.

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