US 5,328,328 A · Sealing device between blade stages and a rotary drum, particularly for preventing leaks around the stages of straightener blades

Sealing device between blade stages and a rotary drum, particularly for preventing leaks around the stages of straightener blades

AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."

InventorsJean-Louis Charbonnel, Jean-Christophe M. J. M. Cordier, Corrine G. Delahaye, Jean-Claude L. Delonge, Guy F. P. Dusserre-Telmon, Jean-Pierre; E. Galivel, Laurent Gille, Jacky S. Naudet, Didier M. L. Nouveau, Thierry H. M. Tassin, Gerard R. E. R. Vermont

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Abstract

A device for ensuring the sealing in a rotary machine between a rotor and fixed blade stages. Blade edges are joined by rings carrying circular seals in slots. Springs force the seals in the longitudinal direction towards transverse faces of reinforcements of the rotor. A turbulence-free gas flow is obtained as a result of the total seal obtained by the seals (19). Moreover, the rotor can be constructed with a substantially rectilinear ferrule which only induces limited stress concentrations.

Claims9

Dependent claims

A device constituted by blade stages in an annular gas flow path and a drum partly defining the path and rotating with respect to the blades about an axis coinciding with a longitudinal direction of the path, the blade stages being terminated by rings which are flush in circular reinforcements of the drum defined by two transverse faces, wherein the rings carry two circular slots, each of the slots housing a seal, each respective slot being open towards a respective transverse face and being out of the slots and pressing them against the transverse faces.

Dependencies are inferred from the claim text.