Recirculation structure for a turbocompressor

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

Patent

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Details

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

Patent

CA 2496543

Disclosed is a recirculation structure for a turbocompressor, comprising an annular chamber which is arranged in the area of the free blade ends (25 to 28) of a blade ring and radially borders the main flow channel (29 to 32), and a plurality of guiding elements (37 to 40) which are disposed inside the annular chamber and are spread across the circumference thereof. Said annular chamber allows the flow to penetrate in the circumferential direction in the front and/or rear area. The guiding elements are connected in a fixed manner to at least one wall of the annular chamber but are detached everywhere else. The tips of the guiding elements, which face the annular chamber, run on and/or near the contour of the main flow channel while axially overlapping the free blade ends or axially bordering the area of the free blade ends.

L'invention concerne une structure de recirculation d'un turbocompresseur comprenant une chambre annulaire (29 à 32) qui est placée dans la zone des extrémités libres (25 à 28) des aubes d'une couronne d'aubes et est adjacente radialement au canal d'écoulement principal, et une pluralité d'élément guides (37 à 40) qui sont placés dans la chambre annulaire et répartis à sa périphérie. La chambre annulaire permet, dans la zone avant et/ou arrière, un passage d'écoulement dans la direction périphérique. Les éléments guides sont solidaires au moins d'une paroi de la chambre annulaire et, par ailleurs, sont libres. Les pointes des éléments guides, opposées à l'espace annulaire, s'étirent sur et/ou à proximité du contour du canal d'écoulement principal et chevauchent axialement les extrémités libres des aubes ou sont axialement adjacentes à la zone des extrémités libres des aubes.

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