Snecma

Snecma Moteurs

Daniel Bernard Dao

Adrien Jacques Philippe Fabre

Francois Maurice Garcin

Alain Paul Madec

Didier Merville

Erick Jacques Boston

Jacques Audet

Jean-Pierre Caubet

Antoine Jean

Marie-France Bourgeois

Francis Soniak

Gérard Miraucourt

Didier Escure

Eric Landragin

Adrien Jacques Fabre

Francis Gilles Soniak

Gerard Gabriel Miraucourt

Didier Rene Escure

Jacques Robert Audet

This blade attachment device comprises a shell () installed around an outer collar () of the pivot () of the blade () and capable of rotating by an angle sufficient for cleats () to close the ends of the pivot groove and retain the root of the blade () in it, and mobile shims that cooperate to retain the root in the groove. Application to aircraft engines.

Device for fastening a variable pitch blade

A device for fastening two parts to each other includes fastening screws extending in aligned passages in the two parts and receiving nuts, and a removable element for preventing the screw heads from moving during tightening or loosening of the nuts on the screws, this removable element cooperating with one of the two parts for preventing rotation of the screw heads relative to this part.

Screw and nut fastening device

A first rotor piece includes a first ring provided with a succession of holes and notches. An assembly is formed by a second rotor piece fixed to a third rotor piece. The second piece ends downstream in a second ring including holes. The third piece ends upstream in a third ring including holes. The second and third rings are arranged against each other with their holes in alignment, and are fixed together by first fasteners. The first ring is arranged upstream of and against the assembly so that the notches fit around the first fasteners so that some of the holes of the first ring are aligned with holes of the assembly, with second fasteners fixing the first ring to the assembly.

Connection between bladed discs on the rotor line of a compressor

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

Growing community of inventors

Savigny-Le-Temple, France

Daniel Bernard Dao