Device for centring a tube in a turbine shaft

Details Device for centring a tube in a turbine shaft Device for centring a tube in a turbine shaft

F - Mech Eng,Light,Heat,Weapons

02

C

F02C 7/00 (2006.01)

Patent

CA 2430285

The invention concerns a device for centring a tube (3) or a component inside a turbine hollow shaft (2) in a gas turbine, said tube (3) or said component being secured in rotation with said shaft (2) at its ends, said device comprising a sheath (9) integral with said tube (3) and enclosing it, an elastic ring (20) interposed between the sheath (9) and the shaft (2) and having a pair of diametrically opposed shoes extending radially outwards, and means for expanding the ring (20) after the device is assembled so that said shoes are pressed against the inner wall of the shaft. The invention is characterised in that the shoes consist of thin cylindrical and elastic walls (25) having unstressed an external diameter slightly different from the internal diameter of the hollow shaft (2) and matching the inner wall (21) of the shaft (2) when assembled.

L'invention concerne un dispositif de centrage d'un tube (3) ou d'une pièce à l'intérieur d'un arbre (2) creux de turbine dans une turbomachine, ce tube (3) ou cette pièce étant solidarisé en rotation audit arbre (2) à ses extrémités, ce dispositif comportant un fourreau (9) solidaire dudit tube (3) et entourant ce dernier, un anneau élastique (20) interposé entre le fourreau (9) et l'arbre (2) et présentant des paires des patins diamétralement opposés qui s'étendent radialement vers l'extérieur, et des moyens pour permettre l'expansion de l'anneau (20) après l'assemblage du dispositif afin que lesdits patins soient en appui contre la paroi intérieure de l'arbre, caractérisé par le fait que les patins sont constitués par des parois minces (25) cylindriques et élastiques ayant au repos un diamètre extérieur légèrement différent du diamètre intérieur de l'arbre (2) creux et épousant la paroi interne (21) de l'arbre (2) après assemblage.

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