F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 29/32 (2006.01) F01D 5/30 (2006.01)
Patent
CA 2489787
The invention concerns a restraining device (5) consisting of a metal structure having recessed parts filled by overmoulding with a semirigid elastomer material in particular on the lower surface lateral edge (13) between two upstream (10) and downstream (11) end zones of entirely metallic structure, on the upper surface lateral edge (14, 15) between a central zone (12) of essentially metallic structure and the end zones (10, 11), and on the two upper portions (18, 19) of the restraining device (5) which extend between the elastomer lateral edges on either side of the metallic central zone. The metallic structure further comprises a lower recess (21) which extends between the two end zones (10, 11) over its entire surface. Hence the metallic structure acts as a spring leaf during the rotation of the blade following a violent impact.
Selon l'invention, la cale (5) est constituée d'une structure métallique ayant des parties évidées comblées par surmoulage avec un matériau élastomère semi- rigide notamment sur le bord latéral (13) côté intrados entre deux zones extrêmes amont (10) et aval (11) de structure entièrement métallique, sur le bord latéral (14, 15) côté extrados entre une zone centrale (12) de structure essentiellement métallique et les zones extrêmes (10, 11), et sur les deux parties supérieures (18, 19) de la cale (5) qui s'étendent entre les bords latéraux en élastomère de part et d'autre de la zone centrale métallique. La structure métallique comporte en outre un évidement inférieur (21) qui s'étend entre les deux zones extrêmes (10, 11) sur toute sa surface. La structure métallique se comporte ainsi comme une lame ressort lors de la rotation de l'aube suite à un choc violent.
Bassot Alain
Buisson Herve
Follonier Christophe
Inghels Eric
Pontoizeau Bruce
Robic
Snecma
Snecma Moteurs
LandOfFree
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