Snecma Moteurs

Jean-Pierre Caubet

Antoine Jean

Jacky S Naudet

Didier Merville

Daniel Bernard Dao

Gabrijel Radeljak

S&eacute;bastien Riccioz

A flexible rod ( ) is articulated at a first end to a control ring ( ) and is fixed at a second end to a pivot of a blade ( ) that is to be controlled. At this second end, it is held so that it can rotate without play on the blade pivot by a holding device ( ). The articulation device comprise a pivot ( ) passing through a first orifice ( ) pierced in this first end and engaged in a radial housing ( ) of the control ring, the pivot being held in position by a locking ring ( ) which has openings ( ) for the passage of this pivot and which slides on this control ring. The fixing device comprise a fixing screw ( ) passing through a second orifice ( ) pierced in the second end of the rod and introduced into a hole ( ) of the pivot of the blade that is to be controlled.

Device for controlling variable-pitch blades

In a turbomachine compressor stator comprising a plurality of variable-pitch vanes ( ), each vane mounted in rotation, about an axis of pivoting ( ), in a wall ( ) forming a surface of revolution about a longitudinal central axis of rotation of the turbomachine ( ), being inclined by a specified angle (&agr;) with respect to a plane perpendicular to this longitudinal central axis, there is provision for this wall to be machined locally opposite an end part of each vane ( ) so as to form a spherical portion or pocket ( ) whose center is positioned on the axis of pivoting and whose radius is determined so as to ensure, over the entire range of operation of the vane, a predetermined minimum clearance between this end part of each vane and the opposite machined spherical pocket while limiting the depth of machining of this pocket.

Compressor stator having a constant clearance

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Dammarie-les-Lys, France

Jean-Pierre Caubet