Variable length wind turbine blade

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

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Details

F03D 7/02 (2006.01)

Patent

CA 2494119

A wind turbine blade (10) made of a fixed blade section (16) with an integral mounting flange (14) for attachment to a wind turbine hub (12). A moveable blade section (18) is attached to the fixed blade section (16) and is free to move in a longitudinal direction relative to the fixed blade section. A positioning device (21) controllably positions the moveable blade section to vary the overall length of the blade. This allows the wind turbine's rotor diameter to be adjusted. The rotor diameter can be increased in order to provide high power output in low wind conditions and it can be decreased in order to minimize loads in high wind conditions.

La présente invention concerne une pale d'éolienne (10) composée d'une partie pale fixe (16) comportant une collerette de montage intégrée (14) qui permet de fixer la pale sur le moyeu (12) d'une éolienne. Une partie pale mobile (18) est attachée à la partie pale fixe (16) et est libre de se déplacer dans une direction longitudinale par rapport à la partie pale fixe. Un dispositif de positionnement (21) permet de positionner de manière réglable la partie pale mobile afin de varier la longueur totale de la pale et, par conséquent, de régler le diamètre du rotor de l'éolienne.L'invention permet d'augmenter le diamètre du rotor afin de fournir une grande puissance de production dans des conditions de vent faible, et de réduire le diamètre du rotor afin de minimiser les charges dans des conditions de vent fort.

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