US 5,288,206 AGranted

Turbo aero engine equipped with means facilitating adjustment of plays of the stator and between the stator and rotor

AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."

InventorsAlain M. L. Bromann, Jean-Louis Charbonnel, Pierre Debeneix, Daniel J. Marey, Jacky Naudet, Thierry J. M. Niclot, Yann J. M. Rigaud

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Abstract

A turbjet engine includes various elements for adjustment of play of the stator by having the stator heated or cooled by a gas. The outer housing to which the ferrule bearing the fixed vane stages is secured may be formed of two skins between which the gas is injected. The ferrule may be composed of sectors extending over one circumference fraction and fixed via their center and simply guided at their extremity; finally, it is possible to provide sealing devices between the outer housing and the support bearing surfaces of the ribs of the ferrule elements. The volume between the ferrule and the housing is then sectioned and is able to receive separate gas feedings for play adjustment.

Claims11

Dependent claims

Turbojet engine which comprises:

a stator which includes one external circular housing and a ferrule bearing fixed vanes mounted on sectors of a circle-shaped elements covering one portion of the circumference of the stators, the ferrule having elements surrounded by the housing and rigidly fixed to the housing at a central location of the sectors and juxtaposed with a predetermined degree of play at circumferential extremities thereof so as to be divided into groups each extending over substantially the full circumference of the stator, wherein guiding pieces of the extremities of the ferrule elements are fixed to the housing and include wings disposed in such a way as to keep the extremity portions of the ferrule elements against the housing in a radial direction, while enabling said elements to slide in a circumferential direction.

Dependencies are inferred from the claim text.