EP1303683B2 - Variable nozzle turbocharger with sheet metal shroud - Google Patents

Variable nozzle turbocharger with sheet metal shroud Download PDF

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Publication number
EP1303683B2
EP1303683B2 EP00953257A EP00953257A EP1303683B2 EP 1303683 B2 EP1303683 B2 EP 1303683B2 EP 00953257 A EP00953257 A EP 00953257A EP 00953257 A EP00953257 A EP 00953257A EP 1303683 B2 EP1303683 B2 EP 1303683B2
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EP
European Patent Office
Prior art keywords
casing
nozzle
cartridge
exhaust
central
Prior art date
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Expired - Lifetime
Application number
EP00953257A
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German (de)
French (fr)
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EP1303683B1 (en
EP1303683A1 (en
Inventor
Giorgio Figura
Denis AlliedSignal Turbo SA JECKEL
Eric AlliedSignal Turbo SA DECHANET
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Honeywell International Inc
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Honeywell International Inc
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/165—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/026—Scrolls for radial machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers

Definitions

  • the present invention generally relates to the field of turbochargers having variable turbine inlet geometries according to claim 1.
  • the present invention more particularly provides a structural arrangement for a variable inlet blade support independent of the turbine housing.
  • turbochargers have significantly increased the overall efficiency and capabilities of turbochargers
  • complexity of support and actuation structures for the blades has increased manufacturing costs and occasionally created maintenance issues.
  • connection of the blade support structure to the turbine housing limits the design and structure flexibility of the turbine housing.
  • Turbine casings are a sensitive thermal load that can affect the performance of emission systems in automotive applications.
  • integration of turbine casings in the exhaust manifold can produce a reduction in the number of parts and the complexity for an automotive turbocharger installation. It is therefore desirable to provide variable nozzle structural support arrangements independent of the turbine housing to improve actuation systems to increase reliability and lower manufacturing costs for the turbochargers that use them.
  • the object of the present invention is the provision of a turbocharger comprising an improved reliability actuation system. This object is achieved by a turbocharger having a combination of the features of claim 1.
  • a variable geometry turbocharger utilizing the present invention includes a central housing having a central bore for carrying a shaft-bearing bearing assembly with a turbine wheel mounted at a first end and a compressor turbine mounted at a second end.
  • a compressor casing incorporating the turbine is attached to the central casing and has an air inlet and a compressed air outlet.
  • a cartridge having a base and an insert is attached to the central housing opposite the compressor housing.
  • the cartridge has a base and an insert.
  • the base and the insertion piece mutually form an exhaust inlet nozzle and the nozzle has an exhaust outlet with an aerodynamic contour corresponding to the turbine wheel.
  • a plurality of blades having rotation posts extending from a first surface substantially parallel to the inner wall of the nozzle constitute the variable nozzle.
  • the posts are received in circumferentially spaced openings in the base of the inner wall of the nozzle.
  • the posts have actuating arms extending to engage in notches in a unison ring engaged between the central housing and the base.
  • the operation of the ring in unison is effected by a crank comprising an actuating arm engaging in a slot in the ring in unison.
  • the crank is continuously movable from a first position to a second position, causing the actuating arm to move in the radial slot and imparting a force perpendicular to the radial slot to drive the rotational movement of the ring to the unison.
  • the rotation movement of the ring in unison causes the blades to rotate by the blade arms.
  • a sheet metal exhaust casing is mounted on the cartridge on the central casing, providing an inlet for the exhaust gas into the nozzle.
  • FIG. figure 1 the embodiment of the invention shown in FIG. figure 1 comprises a compressor housing 10 which is connected to a rear plate 12 using two clamps 14 or more fastened by bolts 16.
  • the back plate is fixed to a central housing 18 with several bolts 20 and an annular seal 22.
  • the sheet metal exhaust casing 24 is connected to the central casing using strips 26 fixed by bolts 28.
  • the exhaust gas or other high-energy gas supplying the turbocharger enter the exhaust casing through the entrance 32.
  • a cartridge generally designated 34, is mounted on the central casing.
  • a turbine wheel and shaft assembly 30 is carried by the bearing, the turbine wheel being suspended within the cartridge.
  • Multiple vanes 36 are mounted on a cartridge base 38.
  • the vanes pivot on posts 40 extending from the vanes into holes 42 in a surface 43 of the base which constitutes the inner wall of the inlet nozzle.
  • Actuating arms 44 extend from the blade posts to engage in notches 46 in the unison ring 48.
  • An actuating crank 50 terminates at a first end by a lever arm 52 carrying a pin 54 for engaging with the slot 56 in the ring in unison for rotation of the ring.
  • the crank extends from a boss 58 in the central housing through a sleeve 60 terminating on an outer arm 62 for engagement by an actuating device.
  • An insertion piece 64 is fixed to the central casing by bolts 66 received in holes 68.
  • Support posts 70 hold the base, pressing the base against spacing pins 39 (best seen on the figure 1 ) received in the central housing.
  • An edge 71 which extends around the circumference of the insertion piece is also engaged by the V-band clamp.
  • the insertion piece has the outer wall of the nozzle 72 in the immediate vicinity of the blades.
  • the insertion piece constitutes the exhaust gas outlet of the turbine 73 with an aerodynamic contour fixing the blades on the wheel of the turbine.
  • the insertion piece and the base with the vanes attached and the actuating elements constitute the cartridge, which is separated from both the central casing and the exhaust casing and fixed between these two components.
  • the use of the cartridge of the present invention makes it possible to simplify the exhaust casing with respect to the prior art designs, facilitating improvements such as a sheet metal exhaust casing, as shown in the embodiments of the invention. drawings.
  • a bearing system having two bearings 74 and a bearing spacer 76 or, in other embodiments, a unit bearing, supports mounting of the shaft wheel in the central bore of the central housing 78.
  • the shaft further extends through a bearing ring 80 which engages with a bearing bearing 82 carried between the central housing and the rear plate of the compressor.
  • a piston ring 84 seals the bearing ring with the shaft bore in the back plate.
  • the compressor turbine 86 is attached to the shaft wheel assembly.

Abstract

A cartridge is formed by an insert fixed to a base to form turbine intake nozzles in which vanes are rotatably mounted, and the base is fixed to a center housing. A separate exhaust housing which is formed from sheet metal is fixed to the cartridge outside of the insert in order to provide an intake and an outlet for exhaust gases driving a turbine wheel on a shaft journaled in the center housing.

Description

La présente invention concerne de façon générale le domaine des turbocompresseurs ayant des géométries d'entrée de turbines variables selon la revendication 1. La présente invention fournit plus particulièrement un agencement structurel pour un support d'aubes d'entrée variable indépendant du carter de turbine.The present invention generally relates to the field of turbochargers having variable turbine inlet geometries according to claim 1. The present invention more particularly provides a structural arrangement for a variable inlet blade support independent of the turbine housing.

Dans un turbocompresseur, il est souvent souhaitable de contrôler l'écoulement des gaz d'échappement dans la turbine pour améliorer le rendement ou la plage fonctionnelle. Diverses configurations de gicleurs variables ont été utilisées pour commander l'écoulement des gaz d'échappement. Des aubes pivotantes multiples positionnées de façon annulaire autour de l'entrée de turbine et habituellement commandées de manière à modifier l'aire d'étranglement des passages entre les aubes constituent une approche qui a été utilisée avec succès dans les turbocompresseurs antérieurs. Diverses approches de ce procédé pour mettre en oeuvre un gicleur variable sont décrites dans les brevets U.S. numéros 4 679 984 de Swihart et al., intitulé "Actuation System for Variable Nozzle Turbine" et 4 804 316 de Fleury, intitulé "Suspension of the Pivoting Vane Actuation Mechanism of a Variable Nozzle Turbocharger", ayant le même cessionnaire que la présente demande.In a turbocharger, it is often desirable to control the flow of exhaust gas into the turbine to improve efficiency or functional range. Various variable nozzle configurations have been used to control the flow of the exhaust gas. Multiple pivoting vanes positioned annularly around the turbine inlet and usually controlled to alter the throttling area of the passages between the vanes is an approach that has been used successfully in previous turbochargers. Various approaches to this method for implementing a variable nozzle are described in the U.S. Patent Nos. 4,679,984 of Swihart et al., entitled "Actuation System for Variable Nozzle Turbine" and 4,804,316 of Fleury, entitled "Suspension of the Pivoting Vane Actuation Mechanism of a Variable Nozzle Turbocharger", having the same assignee as the present application.

Bien que les turbocompresseurs à gicleurs variables à aubes multiples aient sensiblement augmenté le rendement global et les possibilités des turbocompresseurs, la complexité des structures de support et d'actionnement pour les aubes ont augmenté les coûts de fabrication et occasionnellement créé des problèmes d'entretien. De plus, le raccordement de la structure support des aubes au carter de turbine limite la souplesse de conception et de structure du carter de turbine. Les carters de turbine constituent une charge thermique sensible pouvant agir sur les performances des systèmes d'émission dans les applications automobiles. En outre, l'intégration de carters de turbine dans la tubulure d'échappement peut produire une réduction du nombre de pièces et de la complexité pour une installation de turbocompresseur pour automobile. Il est en conséquence souhaitable de fournir des agencements de supports structurels de gicleurs variables indépendants du carter de turbine pour améliorer les systèmes d'actionnement pour accroître la fiabilité et diminuer les coûts de fabrication pour les turbocompresseurs qui les utilisent.Although multi-vane variable-jet turbochargers have significantly increased the overall efficiency and capabilities of turbochargers, the complexity of support and actuation structures for the blades has increased manufacturing costs and occasionally created maintenance issues. In addition, the connection of the blade support structure to the turbine housing limits the design and structure flexibility of the turbine housing. Turbine casings are a sensitive thermal load that can affect the performance of emission systems in automotive applications. In addition, the integration of turbine casings in the exhaust manifold can produce a reduction in the number of parts and the complexity for an automotive turbocharger installation. It is therefore desirable to provide variable nozzle structural support arrangements independent of the turbine housing to improve actuation systems to increase reliability and lower manufacturing costs for the turbochargers that use them.

Un autre turbocompresseur selon l'état de la technique est divulgué dans la demande EP 0 270 384 A2 .
L'antériorité la plus proche est le brevet US 2 860 827 .Another turbocharger according to the state of the art is disclosed in the application EP 0 270 384 A2 .
The closest prior art is the patent US 2,860,827 .

Le but de la présente invention est la fourniture d'un turbocompresseur comprenant un système d'actionnement de fiabilité améliorée. Ce but est atteint par un turbocompresseur ayant une combinaison des caractéristiques de la revendication 1.The object of the present invention is the provision of a turbocharger comprising an improved reliability actuation system. This object is achieved by a turbocharger having a combination of the features of claim 1.

Un turbocompresseur à géométrie variable utilisant la présente invention comporte un carter central ayant un alésage central destiné à porter un montage de roulement supportant un arbre avec une roue de turbine montée à une première extrémité et une turbine de compresseur montée à une deuxième extrémité. Un carter de compresseur incorporant la turbine est fixé au carter central et comporte une entrée d'air et une sortie d'air comprimé.A variable geometry turbocharger utilizing the present invention includes a central housing having a central bore for carrying a shaft-bearing bearing assembly with a turbine wheel mounted at a first end and a compressor turbine mounted at a second end. A compressor casing incorporating the turbine is attached to the central casing and has an air inlet and a compressed air outlet.

Une cartouche comportant une embase et une pièce d'insertion est fixée au carter central à l'opposé du carter du compresseur. La cartouche comporte une embase et une pièce d'insertion. L'embase et la pièce d'insertion forment mutuellement un gicleur d'entrée d'échappement et le gicleur comporte une sortie d'échappement avec un contour aérodynamique correspondant à la roue de turbine.A cartridge having a base and an insert is attached to the central housing opposite the compressor housing. The cartridge has a base and an insert. The base and the insertion piece mutually form an exhaust inlet nozzle and the nozzle has an exhaust outlet with an aerodynamic contour corresponding to the turbine wheel.

Une pluralité d'aubes comportant des poteaux de rotation s'étendant depuis une première surface sensiblement parallèle à la paroi interne du gicleur constituent le gicleur variable. Les poteaux sont reçus dans des ouvertures circonférentiellement espacées dans l'embase de la paroi interne du gicleur. Les poteaux comportent des bras d'actionnement s'étendant pour venir s'engager dans des encoches dans une bague à l'unisson engagée entre le carter central et l'embase.A plurality of blades having rotation posts extending from a first surface substantially parallel to the inner wall of the nozzle constitute the variable nozzle. The posts are received in circumferentially spaced openings in the base of the inner wall of the nozzle. The posts have actuating arms extending to engage in notches in a unison ring engaged between the central housing and the base.

L'actionnement de la bague à l'unisson est effèctué par une manivelle comportant un bras d'actionnement s'engageant dans une fente dans la bague à l'unisson. La manivelle est mobile en continu depuis une première position jusqu'à une deuxième position, provoquant le déplacement du bras d'actionnement dans la fente radiale et communiquant une force perpendiculaire à la fente radiale pour entraîner le mouvement de rotation de la bague à l'unisson. Le mouvement de rotation de la bague à l'unisson provoque la rotation des aubes par les bras des aubes.The operation of the ring in unison is effected by a crank comprising an actuating arm engaging in a slot in the ring in unison. The crank is continuously movable from a first position to a second position, causing the actuating arm to move in the radial slot and imparting a force perpendicular to the radial slot to drive the rotational movement of the ring to the unison. The rotation movement of the ring in unison causes the blades to rotate by the blade arms.

Un carter d'échappement en tôle est monté sur la cartouche sur le carter central, fournissant une entrée pour le gaz d'échappement dans le gicleur.A sheet metal exhaust casing is mounted on the cartridge on the central casing, providing an inlet for the exhaust gas into the nozzle.

Les détails et caractéristiques de la présente invention seront plus facilement compris par rapport à la description détaillée et aux dessins sur lesquels :

  • la figure 1 est une vue en élévation d'un mode de réalisation d'un turbocompresseur utilisant la présente invention ;
  • la figure 2a est une demi-élévation en section de côté autour de la ligne centrale montrant les détails d'un carter d'échappement, d'un carter central et d'un montage de cartouche avec le montage de roue d'arbre de turbine, tel que supporté par le système de roulement ;
  • la figure 2b est une demi-élévation en section de côté selon un plan pivoté par rapport à la figure 2a pour montrer d'autres détails de la cartouche ;
  • la figure 3 est une vue représentative du carter central et du montage de cartouche, montrant un mode de réalisation selon l'invention, avec le carter d'échappement partiellement enlevé ;
  • la figure 4 est une deuxième vue du carter central et du montage de cartouche avec la pièce d'insertion sectionnée pour faire apparaître les aubes du gicleur à géométrie variable ;
  • la figure 5 est une vue représentative de dessous des bras des aubes à géométrie variable, de la bague à l'unisson partielle et du montage de manivelle d'aubes représenté.
The details and features of the present invention will be more readily understood with respect to the detailed description and drawings in which:
  • the figure 1 is an elevational view of an embodiment of a turbocharger utilizing the present invention;
  • the figure 2a is a half-sectioned side elevation around the center line showing the details of an exhaust housing, a center case and a cartridge mount with the turbine shaft wheel mount, such as supported by the rolling system;
  • the figure 2b is a half-elevation in side section on a plane rotated with respect to the figure 2a to show other details of the cartridge;
  • the figure 3 is a representative view of the central casing and the cartridge assembly, showing an embodiment according to the invention, with the casing exhaust partially removed;
  • the figure 4 is a second view of the central case and the cartridge assembly with the sectioned insert to reveal the vanes of the variable geometry nozzle;
  • the figure 5 is a representative view from below of the vanes of variable geometry vanes, partial unison ring and blade crank assembly shown.

En se référant au dessin, le mode de réalisation de l'invention représenté sur la figure 1 comporte un carter de compresseur 10 qui est raccordé à une plaque arrière 12 en utilisant deux pinces 14 ou davantage fixées par des boulons 16. La plaque arrière est fixée à un carter central 18 avec plusieurs boulons 20 et un joint annulaire 22. Pour le mode de réalisation représenté, le carter d'échappement en tôle 24 est raccordé au carter central en utilisant des bandes 26 fixées par des boulons 28. Les gaz d'échappement ou autres gaz à haute énergie alimentant le turbocompresseur entrent dans le carter d'échappement par l'entrée 32.With reference to the drawing, the embodiment of the invention shown in FIG. figure 1 comprises a compressor housing 10 which is connected to a rear plate 12 using two clamps 14 or more fastened by bolts 16. The back plate is fixed to a central housing 18 with several bolts 20 and an annular seal 22. For the mode shown embodiment, the sheet metal exhaust casing 24 is connected to the central casing using strips 26 fixed by bolts 28. The exhaust gas or other high-energy gas supplying the turbocharger enter the exhaust casing through the entrance 32.

Comme on le voit mieux sur les figures 2a, 2b, 3 et 4, une cartouche, désignée de façon générale par 34, est montée sur le carter central. Un montage de roue de turbine et d'arbre 30 est porté par le roulement, la roue de turbine étant suspendue à l'intérieur de la cartouche. Des aubes multiples 36 sont montées sur une embase de cartouche 38. Les aubes pivotent sur des poteaux 40 s'étendant depuis les aubes dans des trous 42 dans une surface 43 de l'embase qui constitue la paroi interne du gicleur d'entrée. Des bras d'actionnement 44 s'étendent depuis les poteaux des aubes pour s'engager dans des encoches 46 dans la bague à l'unisson 48. Une manivelle d'actionnement 50 se termine à une première extrémité par un bras de levier 52 portant une broche 54 pour s'engager avec la fente 56 dans la bague à l'unisson pour la rotation de la bague. La manivelle s'étend depuis un bossage 58 dans le carter central traversant un manchon 60 se terminant sur un bras externe 62 pour engagement par un dispositif d'actionnement.As we see best on Figures 2a , 2b , 3 and 4 , a cartridge, generally designated 34, is mounted on the central casing. A turbine wheel and shaft assembly 30 is carried by the bearing, the turbine wheel being suspended within the cartridge. Multiple vanes 36 are mounted on a cartridge base 38. The vanes pivot on posts 40 extending from the vanes into holes 42 in a surface 43 of the base which constitutes the inner wall of the inlet nozzle. Actuating arms 44 extend from the blade posts to engage in notches 46 in the unison ring 48. An actuating crank 50 terminates at a first end by a lever arm 52 carrying a pin 54 for engaging with the slot 56 in the ring in unison for rotation of the ring. The crank extends from a boss 58 in the central housing through a sleeve 60 terminating on an outer arm 62 for engagement by an actuating device.

Une pièce d'insertion 64, mieux représentée sur les figures 2a, 2b et 3, est fixée au carter central par des boulons 66 reçus dans des trous 68. Des poteaux supports 70 tiennent la base, pressant la base contre des broches d'espacement 39 (mieux vues sur la figure 1) reçues dans le carter central. Un bord 71 qui s'étend autour de la circonférence de la pièce d'insertion est aussi engagé par la pince à bande en V. La pièce d'insertion comporte la paroi externe du gicleur 72 à proximité immédiate des aubes. De plus, la pièce d'insertion constitue la sortie de gaz d'échappement de la turbine 73 avec un contour aérodynamique fixant les lames sur la roue de la turbine. La pièce d'insertion et l'embase avec les aubes fixées et les éléments d'actionnement constituent la cartouche, qui est séparée à la fois du carter central et du carter d'échappement et fixée entre ces deux composants. L'utilisation de la cartouche de la présente invention permet de simplifier le carter d'échappement par rapport aux conceptions de l'art antérieur, facilitant des améliorations telles qu'un carter d'échappement en tôle, comme représenté sur les modes de réalisation des dessins.An insertion piece 64, better represented on the Figures 2a , 2b and 3 , is fixed to the central casing by bolts 66 received in holes 68. Support posts 70 hold the base, pressing the base against spacing pins 39 (best seen on the figure 1 ) received in the central housing. An edge 71 which extends around the circumference of the insertion piece is also engaged by the V-band clamp. The insertion piece has the outer wall of the nozzle 72 in the immediate vicinity of the blades. In addition, the insertion piece constitutes the exhaust gas outlet of the turbine 73 with an aerodynamic contour fixing the blades on the wheel of the turbine. The insertion piece and the base with the vanes attached and the actuating elements constitute the cartridge, which is separated from both the central casing and the exhaust casing and fixed between these two components. The use of the cartridge of the present invention makes it possible to simplify the exhaust casing with respect to the prior art designs, facilitating improvements such as a sheet metal exhaust casing, as shown in the embodiments of the invention. drawings.

En revenant à la figure 1, un système de roulement comportant deux roulements 74 et une pièce d'écartement de roulement 76 ou, dans d'autres modes de réalisation, un roulement unitaire, supporte le montage de roue d'arbre dans l'alésage central du carter central 78. L'arbre s'étend en outre à travers une bague d'appui 80 qui s'engage avec un roulement d'appui 82 porté entre le carter central et la plaque arrière du compresseur. Une bague de piston 84 obture la bague d'appui avec l'alésage d'arbre dans la plaque arrière. La turbine du compresseur 86 est fixée au montage de roue d'arbre.Returning to figure 1 a bearing system having two bearings 74 and a bearing spacer 76 or, in other embodiments, a unit bearing, supports mounting of the shaft wheel in the central bore of the central housing 78. The shaft further extends through a bearing ring 80 which engages with a bearing bearing 82 carried between the central housing and the rear plate of the compressor. A piston ring 84 seals the bearing ring with the shaft bore in the back plate. The compressor turbine 86 is attached to the shaft wheel assembly.

Ayant maintenant entièrement décrit l'invention comme requis par les statuts des brevets, l'homme du métier sera en mesure de constater des modifications et variantes au mode de réalisation spécifique décrit dans la présente. Ces modifications et variantes appartiennent à la portée de l'invention telle que définie dans les revendications suivantes.Having now fully described the invention as required by the patent statutes, those skilled in the art will be able to see modifications and variations to the specific embodiment described herein. These modifications and variations belong to the scope of the invention as defined in the following claims.

Claims (1)

  1. Variable-geometry turbocompressor comprising a turbocompressor casing (18, 24) and a variable inlet vane support (34) separate from the said turbocompressor casing, wherein
    the variable inlet vane support comprises a nozzle internal wall and a nozzle external wall (72) spaced away from the internal nozzle wall to form a nozzle and provided with a plurality of vanes (36) supported between the nozzle internal and external walls,
    the variable inlet vane support further comprises a mechanism (40, 48, 50) intended to rotate the said vanes (36) and represents a cartridge (34) comprising a base (38) defining the said nozzle internal wall and an insert piece (64) defining the said nozzle external wall (72) and having an exhaust outlet with an aerodynamic contour substantially matching a turbine impeller,
    the turbocompressor casing comprises a compressor casing opposite said cartridge and enclosing a compressor impeller and has a compressed air inlet and a compressed air outlet, the turbocompressor casing further comprising an exhaust casing (24) that has an inlet to let exhaust gases into the nozzle, the said exhaust casing being fixed to the outside of the cartridge (34), and a central casing (18) including a center bore having a bearing supporting a shaft with said turbine impeller fixed to the shaft which extends through the center bore and is supported by said bearing, said compressor impeller being attached to said shaft distally with respect to said turbine impeller, wherein
    the cartridge (34) is coupled to the said central casing (18) via said insert piece (64) mounted on the central casing (18), wherein
    the insert piece (64) is fixed to the central casing (18) by means of bolts (66) received in holes (68),
    wherein the exhaust casing (24) is formed of sheet metal and is fixed to the central casing (18) by a V-shaped strip clamp (26) which also engages an edge (71) which engages around the circumference of the insert piece (64).
EP00953257A 2000-07-19 2000-07-19 Variable nozzle turbocharger with sheet metal shroud Expired - Lifetime EP1303683B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2000/002068 WO2002006637A1 (en) 2000-07-19 2000-07-19 Variable nozzle turbocharger with sheet metal shroud

Publications (3)

Publication Number Publication Date
EP1303683A1 EP1303683A1 (en) 2003-04-23
EP1303683B1 EP1303683B1 (en) 2008-07-30
EP1303683B2 true EP1303683B2 (en) 2012-09-19

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EP00953257A Expired - Lifetime EP1303683B2 (en) 2000-07-19 2000-07-19 Variable nozzle turbocharger with sheet metal shroud

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US (1) US6951450B1 (en)
EP (1) EP1303683B2 (en)
JP (1) JP4846961B2 (en)
KR (1) KR100669487B1 (en)
CN (1) CN1304732C (en)
AT (1) ATE403068T1 (en)
AU (1) AU2000265774A1 (en)
BR (1) BR0017293B1 (en)
CA (1) CA2416331C (en)
DE (1) DE60039723D1 (en)
HU (1) HUP0301321A2 (en)
MX (1) MXPA03000497A (en)
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WO2002006637A1 (en) 2002-01-24
EP1303683B1 (en) 2008-07-30
CN1433501A (en) 2003-07-30
AU2000265774A1 (en) 2002-01-30
BR0017293A (en) 2003-07-29
JP4846961B2 (en) 2011-12-28
US6951450B1 (en) 2005-10-04
BR0017293B1 (en) 2008-11-18
HUP0301321A2 (en) 2003-08-28
ATE403068T1 (en) 2008-08-15
MXPA03000497A (en) 2004-09-10
CA2416331C (en) 2009-10-20
CA2416331A1 (en) 2002-01-24
EP1303683A1 (en) 2003-04-23
JP2004505190A (en) 2004-02-19
DE60039723D1 (en) 2008-09-11
CN1304732C (en) 2007-03-14
KR100669487B1 (en) 2007-01-16
KR20030020389A (en) 2003-03-08

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