Apparatus for restraining motion of a turbo-machine...

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

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Details

F01D 9/04 (2006.01) F01D 25/24 (2006.01)

Patent

CA 2234803

A stationary vane assembly (5) for a turbo--machine in which the vane (5) is restrained against motion in the circumferential direction by first (26) and second (19) locking pins. The second locking pin (19) extends radially through a turbine cylinder and engages a notch (32) in a downstream support rail (13) formed on the vane outer shroud (6). The first locking pin (26) is affixed to the front radial flange (8) of the cylinder and has a projection (42) that extends into a notch (30) in an upstream support rail (12) formed on the outer shroud (6). An over-sized slot (40) in the first locking pin (26) allows the circumferential location at which the first locking pin (26) is fixed to the cylinder to be adjusted, thereby ensuring that the first locking pin (26) can be pre-loaded against the outer shroud notch (30) at assembly in a manner that will allow it to restrain the motion of the vane.

Le mouvement d'une aube fixe (5) d'une turbomachine est limité dans le sens circonférentiel au moyen d'un premier (26) et d'un second (19) goujon de blocage. Le second goujon de blocage (19) traverse radialement un cylindre de la turbine et pénètre dans une entaille (32) ménagée dans un rail de support aval (13) formé sur l'anneau externe (6) de renforcement des aubes. Le premier goujon de blocage (26) est fixé sur le rebord frontal radial (8) du cylindre et possède une saillie (42) qui s'étend dans une entaille (30) ménagée dans un rail de support amont (12) formé sur l'anneau externe (6). Une fente surdimensionnée (40) ménagée dans le premier goujon de blocage (26) permet le positionnement circonférentiel auquel le premier goujon de blocage (26) est fixé sur le cylindre à ajuster, s'assurant ainsi que le premier goujon de blocage (26) peut être préchargé contre l'entaille (30) de l'anneau externe lors du montage de manière à limiter le mouvement de l'aube.

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