Device for controlling the orientation of the blades of a...

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 11/30 (2006.01) B64C 11/34 (2006.01) F01D 7/00 (2006.01) F02K 3/02 (2006.01) F04D 29/36 (2006.01)

Patent

CA 2762229

The invention relates to a device for controlling the orientation of the blades of a turboprop fan, comprising at least one set (24a) of fan blades (26) of adjustable orientation coupled in rotation to a rotary ring (28a) connected mechanically to a turbine rotor, each blade of the set being coupled, for adjustment of its orientation, to a synchronizer ring (30a). The device also includes a rolling-contact bearing (54a) having an internal cage (56a) which slides on a turbine casing and which is connected to the rod (44) of an actuator (38), and an external cage (52a) that is connected mechanically to the synchronizer ring by means of a plurality of connecting arms (40a) connected to the actuator rod and hinged to the synchronizer ring in such a way that an actuation of the actuator causes a rotational movement of the synchronizer ring about the longitudinal axis.

L'invention concerne un dispositif de commande de l'orientation des pales de soufflante d'un turbopropulseur comprenant au moins un ensemble (24a) de pales (26) de soufflante à orientation réglable solidaire en rotation d'un anneau rotatif (28a) lié mécaniquement à un rotor de turbine, chaque pale de l'ensemble étant couplée, pour le réglage de son orientation, à un anneau de synchronisation (30a). Le dispositif comprend en outre un palier à roulement (54a) ayant une cage interne (56a) qui est montée coulissante sur un carter de turbine et qui est reliée à la tige (44) d'un vérin (38), et une cage externe (52a) qui est liée mécaniquement à l'anneau de synchronisation au moyen d'une pluralité de bras de liaison (40a) reliés à la tige du vérin et montés articulés sur l'anneau de synchronisation de telle manière qu'un actionnement du vérin entraîne un déplacement en rotation de l'anneau de synchronisation autour de l'axe longitudinal.

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