Rotor blade connection

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

Patent

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Details

F03D 1/06 (2006.01)

Patent

CA 2526729

The invention relates to a rotor blade for a wind power plant provided with several holes which are embodied in the base thereof and designed in the form of passage holes extending essentially vertically with respect to the longitudinal axis of said rotor blade which also comprises transversal bolts inserted into said holes and strength members connectable to the transversal bolts. Usually, the strength members extend in the base of a rotor blade thereby weakening material in said area. The aim of said invention is to solve the problem by simplifying the structure. For this purpose, the inventive rotor blade is characterised in that the strength members extends outwards the rotor blade base in such a way that said area is aerodynamically modified in a disadvantageous manner at a hub area without detrimentally affecting the acoustic behaviour and other properties of the device since the blade base is covered by a blade spinner or arranged at least in the low-rotating rotor area.

L'invention concerne une pale de rotor d'une éolienne, présentant plusieurs trous pratiqués au niveau de la base de la pale de rotor, conçus en tant que trous de passage s'étendant essentiellement perpendiculairement par rapport à l'axe longitudinal de la pale de rotor, ladite pale de rotor comportant également des boulons transversaux insérés dans les trous, et des éléments de traction pouvant être reliés aux boulons transversaux. Habituellement, les éléments de traction s'étendent dans la base de la pale de rotor et fragilisent ainsi le matériau dans cette zone. L'invention vise à résoudre ces problèmes par simplification de la construction. A cet effet, la pale de rotor selon l'invention est caractérisée en ce que les éléments de traction s'étendent en dehors de la base de la pale de rotor. De ce fait, la zone de la base de la pale de rotor est certes modifiée de façon non aérodynamique au niveau du moyeu, mais cela ne présente pas d'effet négatif sur le comportement acoustique ni sur les autres propriétés du dispositif du fait que la base de la pale est recouverte par la casserole de pale ou du moins se situe dans la partie du rotor tournant le moins vite.

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