Folding blade turbine

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

Patent

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Details

F03D 1/06 (2006.01) F03D 11/00 (2006.01) F03D 11/02 (2006.01)

Patent

CA 2734748

A turbine has airfoils that are configured to extract work from a prevailing fluid flow. An actuator causes the airfoils to pivot or fold between a first position with their spans substantially normal to the flow direction and a second position with their spans substantially parallel to the flow direction, or any position in between. The variable geometry allows the airfoils to be sized for relatively light winds and to remain operational in relatively high winds without damage. Under extreme conditions the airfoils may be folded completely for safety.

L'invention porte sur une turbine qui comporte des aubes qui sont configurées pour extraire un travail à partir d'un écoulement de fluide dominant. Un actionneur provoque le pivotement ou le repliement des aubes entre une première position dans laquelle leurs étendues sont sensiblement normales à la direction d'écoulement et une deuxième position dans laquelle leurs étendues sont sensiblement parallèles à la direction d'écoulement, ou toute position entre celles-ci. La géométrie variable permet aux aubes d'être dimensionnées pour des vents relativement faibles et de demeurer opérationnelles dans des vents relativement forts, sans dommage. Dans des conditions extrêmes, les aubes peuvent être complètement repliées pour des raisons de sécurité.

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