F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
F01D 11/24 (2006.01)
Patent
CA 2725864
The invention relates to an improvement in high-pressure turbines (10) of turbine engines, such as a turbojet, in which a housing (40) for driving the axial clearance of rotary blades (18) is provided. According to the invention, an annular member (5) having a predetermined flexibility is also provided, and has one end (51) attached to an annular bearing (24) and another end (52) arranged for simple axial bearing under a given pressure against the upstream portion (401) of the control housing (40). It is thus possible to avoid parasitic vibratory strains at the attachment points (45, 46) of the control housing to the outer casing (22) of the turbines, and to thereby prevent the occurrence of cracks.
L' invention concerne une amélioration apportée aux turbines haute pression (10) de turbomachine, telle qu'un turboréacteur, dans lesquelles est prévu un boitier de pilotage (40) des jeux radiaux d'aubes rotatives (18). Selon l'invention, on prévoit un élément annulaire (5) à flexibilité déterminée dont l'une des extrémités (51) est fixée à un support annulaire (24) et dont l'autre extrémité (52) est en appui simple axial avec une pression donnée contre l'amont (401) du boitier de pilotage (40). On évite ainsi les sollicitations vibratoires gênantes au niveau des points de fixation (45, 46) du boitier de pilotage avec le carter externe (22) des turbines, et par là, le risque d'apparition de criques.
Gendraud Alain Dominique
Le Strat Jean-Luc
Leroux Delphine
Tatiossian Pascal
Goudreau Gage Dubuc
Snecma
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