Two-piece labyrinth seal for a centrifugal compressor...

F - Mech Eng,Light,Heat,Weapons – 04 – D

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F04D 29/08 (2006.01) F04D 29/04 (2006.01) F04D 29/10 (2006.01) F04D 29/16 (2006.01)

Patent

CA 2249086

In order to accommodate a labyrinth seal whose diameter is too large to form a gas passage using conventional techniques, the labyrinth seal is made in two parts. A first part is an inner ring whose outer diameter is sufficiently small so as to permit the forming of a passage therein with conventional techniques. The second part is anouter ring which can then be fastened to the inner ring so as to then extend, incombination, to the radial extent necessary to complete the sealing engagement with an adjacent element. The outer and inner rings are preferably interconnected by way of an interference fit.

Pour adapter un joint à labyrinthe dont le diamètre est trop grand pour former un passage à gaz selon les techniques habituelles, le joint est composé de deux parties. Une première consiste en un anneau intérieur dont le diamètre extérieur est suffisamment petit pour former un passage intérieur selon les méthodes habituelles. La deuxième est constituée d'un anneau extérieur qui peut être fixé à l'anneau intérieur de manière à constituer, avec la première partie, le diamètre nécessaire assez grand pour engager un élément adjacent de façon étanche. Les anneaux extérieur et intérieur sont reliés l'un à l'autre avec un ajustement serré.

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