Vibration damper device for turbomachine blade attachments,...

F - Mech Eng,Light,Heat,Weapons – 01 – D

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Details

F01D 5/30 (2006.01) F04D 29/32 (2006.01)

Patent

CA 2732032

The present invention relates to a vibration-damping device for a turbomachine blade provided with a blade root (6) which is able to be inserted into a pocket (2) of a carrier disk (1) of a bladed wheel, said device being able to be positioned between said blade root and a retaining wall (14a, 14b) of said pocket. Said device comprises at least one shim (7) consisting of an assembly of layers of rigid materials (8, 10) and of viscoelastic materials (9), and comprising two portions, each forming a lateral branch (7a, 7b) which can be inserted along one of the two retaining walls (14a, 14b), the two lateral branches being connected to one another, so as to constitute a single part, by a third portion forming a shim bottom (7c) of rigid material. It is characterized in that at least one layer of viscoelastic material is positioned between two layers of rigid materials (8, 10).

La présente invention porte sur un dispositif d'amortissement vibratoire pour une aube de turbomachine munie d'un pied de pale (6) apte à s'insérer dans un alvéole (2) d'un disque (1) porteur d'une roue aubagée, ledit dispositif étant apte à être positionné entre ledit pied de pale et une paroi de rétention (14a, 14b) dudit alvéole. Ledit dispositif comprend au moins une cale (7) constituée par un assemblage de couches en matériaux rigides (8, 10) et en matériaux viscoélastiques (9), et comportant deux parties, chacune formant une branche latérale (7a, 7b) apte à être insérée le long d'une des deux parois de rétention (14a, 14b), les deux branches latérales étant reliées l'une à l'autre, de façon à constituer une pièce unique, par une troisième partie formant fond de cale (7c) en matériau rigide. Il est caractérisé en ce que au moins une couche (9) en matériau viscoélastique est positionnée entre deux couches en matériaux rigides (8, 10).

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