Two-stage, variable-setting device for stator blades in a...

Details Two-stage, variable-setting device for stator blades in a... Two-stage, variable-setting device for stator blades in a...

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 9/02 (2006.01) F01D 17/12 (2006.01) F01D 17/16 (2006.01)

Patent

CA 2470081

The pitch control mechanism (controlling the angular position) for stator blades in a turbojet may be adjusted separately for two adjacent stages of blades controlled by a common actuator means (10). To achieve this, the synchronization bar (9) located between the mechanisms leading to the two stages is inclined, this inclination being determined by a pin (22) and groove (23) connection with the casing, while another pin (26) and groove (27) connection is arranged between the synchronization bar (9) and one of the mechanisms. Strongly non-linear displacement laws between the two mechanisms may thus be controlled depending on the shapes and directions of the grooves (Figure 2).

Le mécanisme de commande de calage (position angulaire) d'aube de stator dans un turboréacteur peut être réglé séparément pour deux étages d'aube voisins commandés par un moyen actionneur 10 commun. Pour cela, la barre de synchronisation 9 entre les mécanismes menant aux deux étages prend une inclinaison déterminée par une liaison à ergot 22 et rainure 23 avec le carter, tandis qu'une autre liaison à ergot 26 et rainure 27 est ménagée entre la barre de synchronisation 9 et un des mécanismes. Des lois de déplacement fortement non linéaires entre les deux mécanismes peuvent ainsi être commandées d'après les formes et les directions des rainures. Figure 2.

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