Cylinder driving device

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

Patent

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Details

F03D 7/04 (2006.01)

Patent

CA 2732985

An object is to provide a cylinder driving device of a wind-power generation system capable of appropriately controlling a pitch angle of each rotor blade at a time of power failure with a simple configuration. The present invention achieves the object by including a piston connected to the rotor blade; a cylinder that moves the piston by a hydraulic pressure; an urging member that urges the piston in one direction; an accumulator that is connected to the cylinder, and supplies hydraulic oil urging the piston in an opposite direction to a direction where the piston is urged by the urging member to the cylinder; and an on/off valve that controls opening or closing of a channel between the accumulator and the cylinder.

La présente invention concerne un dispositif d'entraînement de cylindre pour un système de génération d'énergie électrique éolien, le dispositif étant capable de commander de façon appropriée, au moyen d'une configuration simple, l'angle de pas de pales de rotor au moment d'une coupure de courant. L'invention concerne un dispositif d'entraînement de cylindre doté : d'un piston relié aux pales de rotor ; d'un cylindre permettant de déplacer le piston par pression hydraulique ; d'un élément de pression disposé à l'intérieur du cylindre et pressant le piston dans une direction ; d'un accumulateur relié au cylindre et fournissant de l'huile de fonctionnement au cylindre, l'huile de fonctionnement pressant le piston dans la direction opposée à la direction dans laquelle le piston est pressé par l'élément de pression ; et d'une soupape marche/arrêt permettant d'ouvrir et de fermer la trajectoire assurant la liaison entre l'accumulateur et le cylindre.

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