Modified darrieus vertical axis turbine

Details Modified darrieus vertical axis turbine Modified darrieus vertical axis turbine

F - Mech Eng,Light,Heat,Weapons

03

D

F03D 3/00 (2006.01) F03D 3/06 (2006.01) F03D 11/04 (2006.01)

Patent

CA 2685189

A lift-type turbine comprising at least three blades at circumferentially spaced positions is supported for rotation about a vertical axis. Each blade has an airfoil shape to generate a torque about the axis responsive to wind across the blades. A support comprising cables under tension is connected between adjacent ones of the blades to extend generally circumferentially about the turbine. Accordingly a minimum number of parts form the structure of the blades while minimizing the drag produced during rotation thereof due to the support members lying in a common circumferential path. The tension of the support members can support the blades in a pre-stressed condition to optimize the shape and performance thereof.

L'invention concerne une turbine de type à portance comprenant au moins trois pales à des positions espacées sur la périphérie, la turbine étant supportée pour une rotation autour d'un axe vertical. Chaque pale a une forme de profil aérodynamique pour générer un couple autour de l'axe en réponse au vent passant à travers les pales. Un support comprenant des câbles tendus est relié entre des pales adjacentes des pales pour s'étendre généralement de manière périphérique autour de la turbine. En conséquence, un nombre minimal de pièces forme la structure des pales, tout en minimisant la traînée produite pendant la rotation de celles-ci en raison des éléments de support se trouvant dans un trajet périphérique commun. La tension des éléments de support peut supporter les pales dans un état précontraint pour optimiser la forme et la performance de celles-ci.

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