ANGULAR STATOR SECTOR FOR A TURBOMACHINE COMPRESSOR COMPRISING A BRUSH SEAL

The main object of the invention is an angular stator sector () for a turbomachine compressor, comprising an outer shroud and an inner shroud (S) arranged coaxially one inside the other, and at least one vane (P) extending radially between the outer shroud and the inner shroud (S) and connected to the latter by its radial ends, characterised in that the inner shroud (S) comprises at least one brush seal () forming an obstacle to the recirculation of the downstream gases upstream of the inner shroud (S). 2. Compressor according to claim 1 , wherein the inner shroud comprises a brush seal on its downstream axial end.3. Compressor according to claim 1 , wherein the inner shroud comprises a brush seal on its upstream axial end.4. Compressor according to claim 1 , wherein the inner shroud comprises a brush seal on its radial inner end.5. Compressor according to claim 1 , wherein the inner shroud of the angular stator sector comprises a brush seal fastened on the radial inner end of the inner shroud claim 1 , extending substantially in contact with the rotor shroud claim 1 , and wherein one or several lips are arranged on the radially outer portion of the rotor shroud by being axially separated from said brush seal.6. Compressor according to claim 1 , wherein the inner shroud of the angular stator sector comprises a first brush seal fastened on the downstream axial end of the inner shroud and/or a second brush seal fastened on the upstream axial end of the inner shroud claim 1 , the first brush seal and/or the second brush seal extending from the inner shroud respectively to the downstream rotor platform and/or the upstream rotor platform according to respectively a first angle and/or a second angle in relation to the axis of rotation of the turbomachine in such a way as to form a substantially continuous evolution of the inner wall of the aerodynamic stream at the passage between the inner shroud and the downstream rotor platform and/or at the passage between the inner ...

SEALED SEAL FOR DOUBLE, AXIAL AND RADIAL SEALING

Un joint à labyrinthe du genre asservi comprend une étanchéité à la fois radiale et axiale, au moyen de deux léchettes (19, 21) de directions différentes en face d'une portée d'étanchéité cylindrique (20) et d'une portée d'étanchéité plane (22). L'équilibre statique du corps mobile (11) est obtenu quand la léchette axiale (21) est tangente à la surface plane (22), la chambre intérieure (24) étant à la même pression que l'enceinte (23). L'équilibre étant rétabli immédiatement en cas de perturbations, on évite une usure notable du joint par des frottements. Un jeu modéré est accepté devant la léchette radiale (19). Le débit de fuite est très réduit, grâce à la tangence de la léchette axiale (21). A labyrinth seal of the slave type comprises both radial and axial sealing, by means of two wipers (19, 21) of different directions opposite a cylindrical sealing surface (20) and a bearing surface. flat sealing (22). The static equilibrium of the movable body (11) is obtained when the axial wiper (21) is tangent to the planar surface (22), the inner chamber (24) being at the same pressure as the enclosure (23). The equilibrium being restored immediately in case of disturbances, significant wear of the seal by friction is avoided. Moderate play is accepted in front of the radial wiper (19). The leakage rate is very low, thanks to the tangency of the axial wiper (21).

ANGULAR SECTOR OF RECTIFIER FOR TURBOMACHINE COMPRESSOR WITH A BRUSH SEAL

L'objet principal de l'invention est un secteur angulaire de redresseur (10) pour compresseur de turbomachine, comportant une virole externe et une virole interne (S) disposées coaxialement l'une à l'intérieur de l'autre, et au moins une pale (P) s'étendant radialement entre la virole externe et la virole interne (S) et raccordée à celles-ci par ses extrémités radiales, caractérisé en ce que la virole interne (S) comporte au moins un joint d'étanchéité à brosse (1, 2, 3) formant obstacle de recirculation des gaz d'aval en amont de la virole interne (S). The main object of the invention is an angular rectifier sector (10) for a turbomachine compressor, comprising an outer shell and an inner shell (S) arranged coaxially one inside the other, and at least a blade (P) extending radially between the outer shell and the inner shell (S) and connected to the latter by its radial ends, characterized in that the inner shell (S) comprises at least one sealing gasket brush (1, 2, 3) forming an obstacle for recirculation of the downstream gases upstream of the internal ring (S).

SEALED SEAL FOR DOUBLE, AXIAL AND RADIAL SEALING

Un joint à labyrinthe du genre asservi comprend une étanchéité à la fois radiale et axiale, au moyen de deux léchettes (19, 21) de directions différentes en face d'une portée d'étanchéité cylindrique (20) et d'une portée d'étanchéité plane (22). L'équilibre statique du corps mobile (11) est obtenu quand la léchette axiale (21) est tangente à la surface plane (22), la chambre intérieure (24) étant à la même pression que l'enceinte (23). L'équilibre étant rétabli immédiatement en cas de perturbations, on évite une usure notable du joint par des frottements. Un jeu modéré est accepté devant la léchette radiale (19). Le débit de fuite est très réduit, grâce à la tangence de la léchette axiale (21). A labyrinth seal of the slave type comprises both radial and axial sealing, by means of two wipers (19, 21) of different directions facing a cylindrical sealing surface (20) and a bearing surface. flat sealing (22). The static equilibrium of the movable body (11) is obtained when the axial wiper (21) is tangent to the planar surface (22), the inner chamber (24) being at the same pressure as the enclosure (23). Equilibrium being restored immediately in case of disturbances, significant wear of the seal is avoided by friction. Moderate play is accepted in front of the radial wiper (19). The leakage rate is very low, thanks to the tangency of the axial wiper (21).

VARIABLE SETTING RECTIFIER STAGE FOR TURBOMACHINE COMPRESSOR COMPRISING A BRUSHED GASKET

VARIABLE SETTING RECTIFIER STAGE FOR TURBOMACHINE COMPRESSOR COMPRISING A BRUSHED GASKET

L'objet principal de l'invention est un étage redresseur à calage variable (10) pour compresseur de turbomachine, comportant une rangée annulaire d'aubes à calage variable (11), chaque aube à calage variable (11) comportant à ses extrémités radialement externe et radialement interne, respectivement un pivot externe (8) et un pivot interne (9) sensiblement cylindriques, le pivot externe (8) et le pivot interne (9) étant respectivement engagés dans des logements d'un carter externe (6) et d'un anneau interne (7) de l'étage redresseur à calage variable (10), chaque aube à calage variable (11) définissant un jeu externe (J2) et un jeu interne (J1), respectivement entre le carter externe (6) et l'extrémité externe de l'aube à calage variable (11), et entre l'anneau interne (7) et l'extrémité interne de l'aube à calage variable (11), caractérisé en ce qu'au moins un joint d'étanchéité à brosse (4) formant obstacle de circulation des gaz au moins de l'intrados (I) vers l'extrados (E) d'une aube à calage variable (11) est positionné au niveau du jeu externe (J2) et/ou du jeu interne (J1) de ladite aube à calage variable (11). The main object of the invention is a variable-pitch rectifier stage (10) for a turbomachine compressor, comprising an annular row of variable-pitch vanes (11), each variable-pitch vane (11) having at its ends radially external and radially inner, respectively an outer pivot (8) and a substantially cylindrical inner pivot (9), the outer pivot (8) and the inner pivot (9) being respectively engaged in housings of an outer casing (6) and an internal ring (7) of the variable-pitch rectifier stage (10), each variable-pitch blade (11) defining an external clearance (J2) and an internal clearance (J1) respectively between the outer casing (6) ) and the outer end of the variable pitch blade (11), and between the inner ring (7) and the inner end of the variable pitch blade (11), characterized in ...