Efficient wind turbine blades, wind turbine blade...

F - Mech Eng,Light,Heat,Weapons – 03 – D

Patent

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F03D 1/06 (2006.01) F03D 3/06 (2006.01) F03D 11/00 (2006.01)

Patent

CA 2745652

Wind turbine systems and methods are disclosed herein. A representative system includes a wind turbine blade having an inner region that has an internal load-bearing truss structure, and an outer region that has an internal, non-truss, load--bearing structure. In particular embodiments, the truss structure can include a triangular arrangement of spars, and/or can include truss attachment members that connect components of the truss without the use of holes in the spars. Spars can be produced from a plurality of pultruded composite members laminated together in longitudinally extending portions. The longitudinally extending portions can be connected at joints that interleave projections and recesses of each of the spar portions. The blades can include fan-shaped transitions at a hub attachment portion, formed by laminated layers and/or a combination of laminated layers and transition plates.

Linvention concerne des systèmes déolienne et des procédés. Un système représentatif comprend une pale déolienne qui présente une région interne possédant une structure portante interne en treillis et une région externe possédant une structure portante interne qui nest pas en treillis. Dans des modes de réalisation particuliers, la structure en treillis peut comprendre un agencement triangulaire de longerons et/ou peut comprendre des éléments de fixation de treillis qui relient les composants du treillis sans utiliser de trous dans les longerons. Les longerons peuvent être fabriqués à partir dune pluralité déléments composites pultrudés, stratifiés ensemble dans des parties sétendant longitudinalement. Lesdites parties peuvent être reliées au niveau de joints qui entrelacent les saillies et les creux de chacune des parties longeron. Les pales peuvent comprendre des transitions en forme déventail sur une partie fixation de moyeu, les transitions étant formées par des couches stratifiées et/ou une combinaison de couches stratifiées et de plaques de transition.

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