Recirculation structure for turbocompressors

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

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F01D 11/08 (2006.01) F01D 5/14 (2006.01) F04D 27/02 (2006.01) F04D 29/54 (2006.01)

Patent

CA 2495186

Recirculation structure for turbocompressors, having an annular chamber, arranged in the area of the free blade ends of a blade ring for the most part upstream of the latter and adjoining the main flow duct, and having a plurality of guide elements, which are arranged in the annular chamber distributed over the periphery thereof and which are arranged and shaped in a manner favorable to the recirculation flow, the guide elements having recesses in the front and/or rear area, of the annular chamber. The side of the annular chamber adjoining the contour of the main flow duct is open over its axial length and over its entire periphery, the free edges of the guide elements lying on or close to the contour of the main flow duct.

L'invention concerne une structure de recirculation de turbocompresseurs comprenant une chambre annulaire (29) adjacente au canal d'écoulement principal (9) et placée dans la zone des extrémités libres des aubes d'une couronne d'aubes notamment principalement en amont de cette dernière. Cette structure de recirculation comprend également une pluralité d'éléments de guidage (37) qui, placés dans la chambre annulaire et répartis sur sa périphérie, sont formés et disposés de manière favorable à l'écoulement par rapport au flux de recirculation. Les éléments de guidage (37) présentent des évidements dans la zone avant et/ou arrière de la chambre annulaire (29). La face de la chambre annulaire (29), face adjacente au contour du canal d'écoulement principal (9), est ouverte sur la longueur axiale et sur toute la circonférence de ce dernier. Les bords libres (41) des éléments de guidage (37) se trouvent sur ou à proximité du contour du canal d'écoulement principal (9).

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