Device for a non-hermetic seal

Details Device for a non-hermetic seal Device for a non-hermetic seal

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 11/02 (2006.01) F01D 11/00 (2006.01) F16J 15/32 (2006.01)

Patent

CA 2446412

An arrangement for a non-hermetic seal between a stator and a rotor of a turbomachine in the root region of guide blades belonging to the stator, comprising a brush sealing ring which is mounted on the guide blades via a spoke centering means and whose bristles together with a rotating sealing surface form a fluid barrier which is permeable in a defined manner. On the sealing side of lower pressure, a supporting ring for the bristles is arranged at a slight distance from the rotating sealing surface, and this supporting ring is integrally connected to the guide blade roots and can be segmented by means of parting seams. The spoke centering means is designed to be permeable to pressure, as a result of which the brush sealing ring is pressure-relieved axially, with the exception of the bristle area between sealing surface and supporting ring.

L'invention concerne un ensemble permettant de former un joint non hermétique entre un stator et un rotor d'un turbomoteur dans la zone de base d'aubes directrices associées au stator. Cet ensemble comprend un joint à brosse, monté sur les aubes directrices par un élément de centrage à rayons et dont les poils forment, avec une surface d'étanchéité rotative, une barrière à fluide d'une perméabilité définie. Côté joint où règne une faible pression de service, une bague d'appui pour les poils est placée à une faible distance de la surface d'étanchéité rotative. Cette bague est entièrement reliée aux bases des aubes directrices et peut être segmentée à l'aide de joints de séparation. Grâce à cet élément de centrage à rayons, conçu de manière perméable à la pression, le joint à brosse est libéré de la pression dans le sens axial, sauf au niveau de la surface des poils située entre la surface d'étanchéité et la bague d'appui.

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