Bladed rotor disc side-plate and corresponding arrangement

Details Bladed rotor disc side-plate and corresponding arrangement Bladed rotor disc side-plate and corresponding arrangement

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/08 (2006.01) F01D 11/02 (2006.01)

Patent

CA 2398319

The invention concerns a side-plate (10) covering a turbine blade (4) disc (3) enabling its ventilation (27, 29) and whereof the surface (24) facing away from the disc (3) is provided with a labyrinth seal (20) comprising thin cascading elements (23) to provide a leaktightness is characterised in that the blades of the thin cascading elements (23) are axially inclined and axially and radially offset, so as to slew the centre of gravity of the flexible web (14) of the side-plate and promote deformation of the web (14) towards the disc (3) under the effect of centrifugal forces, so as to reinforce the contact of a support bearing (15) with a plate (16) of the disc (3). The hooks whereby the periphery of the web (14) is often assembled to the disc (3) are not required.

Un flasque (10) couvrant un disque (3) d'aube (4) de turbine afin de permettre sa ventilation (27, 29) et dont la face (24) détournée du disque (3) est pourvue d'un joint à labyrinthe (20) à léchettes (23) pour former une étanchéité est original en ce que les couteaux (37) des léchettes (23) sont inclinés axialement et décalés axialement et radialement, afin de déporter le centre de gravité de la toile (14) flexible du flasque et de favoriser la déformation de la toile (14) vers le disque (3) sous l'effet des forces centrifuges, afin de renforcer le contact d'une portée d'appui (15) avec une glace (16) du disque (3). Les crochets par lesquels la périphérie de la toile (14) est souvent réunie au disque (3) deviennent inutiles.

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