Impeller containment system

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

Patent

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Details

F01D 21/04 (2006.01) F01D 5/04 (2006.01)

Patent

CA 2352852

The present invention relates to an impeller containment system for containing the burst of an impeller or the burst of impeller fragments from an impeller hub. The containment system utilizes a catcher (60, 62) extending from the shroud back plate (34) adjacent the impeller, which engages the snagger (50, 52) formed as a unitary part of the impeller. The catcher (60, 62) and snagger (50, 52) cooperate to restrain a burst impeller or impeller fragments to their shortest radial distance from their point of burst. The system also includes a shroud (32), which circumferentially surrounds the impeller, and a diffuser (70), which circumferentially surrounds the radial tip portions of the impeller.

Cette invention concerne un système de confinement pour turbine destiné à contenir l'explosion d'une turbine ou de l'une ou plusieurs de ses pales qui se détacheraient du moyeu. Ledit système de confinement pour turbine comprend un épaulement annulaire femelle (60, 62) dans le prolongement du carénage arrière (34) adjacent à la turbine. Ledit épaulement annulaire femelle s'emboîte dans un épaulement annulaire mâle (50, 52) réalisé dans la masse même de la turbine. L'ensemble épaulement femelle (60, 62), épaulement mâle (50, 52) sert à limiter au maximum le rayon de l'explosion de la turbine ou de l'une ou plusieurs de ses pales. Le système comprend également un carénage (32) faisant le tour de la turbine, et un diffuseur (70) qui fait le tour des parties radiales supérieures de la turbine.

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