Blade control device with variable blade angle and tight...

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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F01D 7/00 (2006.01) F01D 17/16 (2006.01) F04D 29/56 (2006.01)

Patent

CA 2418233

A device for controlling a variable-angle vane for a stator of a turbomachine compressor, the device comprising a link (30), connection means (24) forming a hinge between a first end of the link (32) and a control ring, and fixing means for fixing a second end (34) of the link on a pivot (12) of a vane to be controlled, a radial recess (16) formed in the vane pivot for receiving the second end of the link, the recess having at least one plane edge (16a) inclined relative to a longitudinal midplane (P) of the recess and co-operating with a corresponding inclined edge (34a) of the second end of the link, and a clamping cap (44) bearing against the second end of the link and on which the fixing means act, the clamping cap having an inside surface (48a) providing plane contact with the outside face (36) of the second end of the link in order to maintain the second end of the link against the vane pivot without slack by means of contact between the-inclined edges.

Dispositif de commande d'aube à angle de calage variable pour redresseur de compresseur de turbomachine, comportant une biellette (30), des moyens de liaison (24) formant articulation entre une première extrémité (32) de la biellette et un anneau de commande, des moyens de fixation d'une deuxième extrémité (34) de la biellette sur un pivot (12) d'une aube à commander, un évidement radial (16) pratiqué dans le pivot de l'aube et destiné à recevoir la deuxième extrémité de la biellette, l'évidement comportant au moins un bord plan (16a) incliné par rapport à un plan longitudinal médian (P) de l'évidement et coopérant avec un bord incliné correspondant (34a) de la deuxième extrémité de la biellette, et un chapeau de serrage (44) appliqué sur la deuxième extrémité de la biellette et sur lequel agissent les moyens de fixation, le chapeau de serrage comportant une surface interne (48a) assurant un contact plan avec la face externe (36) de la deuxième extrémité de la biellette pour maintenir sans jeu la deuxième extrémité de la biellette sur le pivot de l'aube par contact entre les bords inclinés.

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