EP1303683A1 - Variable nozzle turbocharger with sheet metal shroud - Google Patents

Variable nozzle turbocharger with sheet metal shroud

Info

Publication number
EP1303683A1
EP1303683A1 EP00953257A EP00953257A EP1303683A1 EP 1303683 A1 EP1303683 A1 EP 1303683A1 EP 00953257 A EP00953257 A EP 00953257A EP 00953257 A EP00953257 A EP 00953257A EP 1303683 A1 EP1303683 A1 EP 1303683A1
Authority
EP
European Patent Office
Prior art keywords
casing
nozzle
cartridge
ring
unison
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00953257A
Other languages
German (de)
French (fr)
Other versions
EP1303683B2 (en
EP1303683B1 (en
Inventor
Giorgio Figura
Denis AlliedSignal Turbo SA JECKEL
Eric AlliedSignal Turbo SA DECHANET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell International Inc
Original Assignee
Honeywell International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Honeywell International Inc filed Critical Honeywell International Inc
Publication of EP1303683A1 publication Critical patent/EP1303683A1/en
Application granted granted Critical
Publication of EP1303683B1 publication Critical patent/EP1303683B1/en
Publication of EP1303683B2 publication Critical patent/EP1303683B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 relates generally to the field of turbochargers having variable inlet geometry of turbines.
  • the present invention more particularly provides a structural arrangement for a support of variable inlet vanes independent of the turbine casing.
  • turbochargers have significantly increased the overall efficiency and capabilities of the turbochargers
  • complexity of the support and actuation structures for the blades has increased manufacturing costs and occasionally created maintenance problems.
  • connection of the support structure of the blades to the turbine casing limits the flexibility of design and structure of the turbine casing.
  • Turbine housings constitute a sensitive thermal load which can act on the performance of emission systems in automotive applications.
  • integration of turbine casings into the exhaust manifold can produce a reduction in the number of parts and the complexity for a turbocharger installation for an automobile. It is therefore desirable to provide structural support arrangements for variable nozzles independent of the turbine casing to improve actuation systems to increase reliability and decrease manufacturing costs for the turbochargers that use them.
  • a variable geometry turbocharger using the present invention includes a central housing having a central bore for carrying a bearing assembly supporting a shaft with a turbine wheel mounted at a first end and a compressor turbine mounted at a second end.
  • a compressor housing incorporating the turbine is attached to the central housing and has an air inlet and a compressed air outlet.
  • a cartridge comprising a base and an insert is fixed to the central casing opposite the compressor casing.
  • 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 vanes having rotating posts extending from a first surface substantially parallel to the internal 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 include actuating arms extending to engage in notches in a ring in unison engaged between the central casing and the base.
  • the actuation of the ring in unison is carried out 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 movement of the actuating arm in the radial slot and imparting a force perpendicular to the radial slot to cause the movement of rotation of the ring to the unison.
  • the rotational 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.
  • Figure 1 is an elevational view of an embodiment of a turbocharger using the present invention
  • Figure 2a is a half elevation in side section around the center line showing the details of an exhaust casing, a central casing and a cartridge mounting with the turbine shaft wheel mounting , as supported by the bearing system
  • Figure 2b is a half elevation in side section along a plane rotated relative to Figure 2a to show other details of the cartridge
  • FIG. 3 is a representative view of the central casing and of the cartridge assembly, showing an embodiment according to the invention, with the exhaust casing partially removed
  • FIG. 4 is a second view of the central casing and of the cartridge assembly with the cut-out insert to reveal the blades of the nozzle with variable geometry;
  • FIG. 5 is a representative view from below of the arms of the blades with variable geometry, of the ring in partial unison and of the assembly of the blade crank shown.
  • the embodiment of the invention shown in Figure 1 includes a compressor housing 10 which is connected to a back plate 12 using two or more clamps 14 secured by bolts 16.
  • the back plate is fixed to a central casing 18 with several bolts 20 and an annular seal 22.
  • the sheet metal exhaust casing 24 is connected to the central casing using bands 26 fixed by bolts 28. The gases from exhaust or other high-energy gases supplying the turbocharger enter the exhaust casing through the inlet 32.
  • a cartridge generally designated by 34, is mounted on the central housing.
  • a turbine wheel and shaft assembly 30 is carried by the bearing, the turbine wheel being suspended inside the cartridge.
  • Multiple blades 36 are mounted on a cartridge base 38.
  • the blades pivot on posts 40 extending from the blades into holes 42 in a surface 43 of the base which constitutes the internal wall of the inlet nozzle.
  • Arms actuator 44 extend from the posts of the blades to engage. in notches 46 in the ring in unison 48.
  • An actuating crank 50 ends at a first end by a lever arm 52 carrying a pin 54 to engage with the slot 56 in the ring in unison for the rotation of the ring.
  • the crank extends from a boss 58 in the central casing passing through a sleeve 60 ending on an external arm 62 for engagement by an actuating device.
  • An insert 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 (better seen in FIG. 1) received in the central casing.
  • An edge 71 which extends around the circumference of the insert is also engaged by the V-shaped band clamp.
  • the insert comprises the external wall of the nozzle 72 in the immediate vicinity of the blades.
  • the insert constitutes the exhaust gas outlet from the turbine 73 with an aerodynamic contour fixing the blades on the wheel of the turbine.
  • the insert and the base with the fixed vanes 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 compared to the designs of the prior art, facilitating improvements such as a sheet metal exhaust casing, as shown in the embodiments of the drawings.
  • a bearing system comprising two bearings 74 and a spacer bearing 76 or, in other embodiments, a unitary bearing, - supports the mounting of the shaft wheel in the central bore of the central casing - 78.
  • the shaft further extends through a ring d 'support 80 which engages with a support bearing 82 carried between the central casing and the rear plate of the compressor.
  • a piston ring 84 closes the support ring with the shaft bore in the rear plate.
  • the turbine of compressor 86 is fixed to the shaft wheel assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
  • Control Of Turbines (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention concerns a variable nozzle turbocharger using a cartridge (34) comprising vanes in a turbine intake nozzle formed by a base (38) fixed to a central casing (18) and a casing insert (64) fixed to the base (38). A separate exhaust case (24) is received on the cartridge (34) outside the casing insert (64) so as to provide an intake and an outlet for the exhaust gases driving the turbocharger turbine wheel.

Description

TURBOCOMPRESSEUR A GEOMETRIE VARIABLE AVEC VIROLE EN TOLE TURBOCHARGER WITH VARIABLE GEOMETRY WITH SHEET CRANK
La présente invention concerne de façon générale le domaine des turbocompresseurs ayant des géo étries d'entrée de turbines variables. 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 relates generally to the field of turbochargers having variable inlet geometry of turbines. The present invention more particularly provides a structural arrangement for a support of variable inlet vanes independent of the turbine casing.
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 gases through the turbine to improve efficiency or the functional range. Various variable nozzle configurations have been used to control the flow of exhaust gases. Multiple pivoting vanes positioned annularly around the turbine inlet and usually controlled to change the bottleneck of the passages between the vanes is one approach which has been used successfully in prior turbochargers. Various approaches to this method for implementing a variable nozzle are described in US Patents Nos. 4,679,984 to Swihart et al., Entitled "Actuation System for Variable Nozzle Turbine" and 4,804,316 to Fleury, entitled "Suspension of the Pivoting Vane Actuation Mechanism of a Variable Nozzle Turbocharger ", with the same assignee as this 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 nozzle turbochargers have significantly increased the overall efficiency and capabilities of the turbochargers, the complexity of the support and actuation structures for the blades has increased manufacturing costs and occasionally created maintenance problems. . In addition, the connection of the support structure of the blades to the turbine casing limits the flexibility of design and structure of the turbine casing. Turbine housings constitute a sensitive thermal load which can act on the performance of emission systems in automotive applications. In addition, the integration of turbine casings into the exhaust manifold can produce a reduction in the number of parts and the complexity for a turbocharger installation for an automobile. It is therefore desirable to provide structural support arrangements for variable nozzles independent of the turbine casing to improve actuation systems to increase reliability and decrease manufacturing costs for the turbochargers that use them.
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 using the present invention includes a central housing having a central bore for carrying a bearing assembly supporting a shaft with a turbine wheel mounted at a first end and a compressor turbine mounted at a second end. A compressor housing incorporating the turbine is attached to the central housing 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 comprising a base and an insert is fixed to the central casing opposite the compressor casing. 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 vanes having rotating posts extending from a first surface substantially parallel to the internal 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 include actuating arms extending to engage in notches in a ring in unison engaged between the central casing and the base.
L' actionnement de la bague à l'unisson est effectué 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 actuation of the ring in unison is carried out 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 movement of the actuating arm in the radial slot and imparting a force perpendicular to the radial slot to cause the movement of rotation of the ring to the unison. The rotational 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 from the detailed description and drawings in which: Figure 1 is an elevational view of an embodiment of a turbocharger using the present invention; Figure 2a is a half elevation in side section around the center line showing the details of an exhaust casing, a central casing and a cartridge mounting with the turbine shaft wheel mounting , as supported by the bearing system; Figure 2b is a half elevation in side section along a plane rotated relative to Figure 2a to show other details of the cartridge; FIG. 3 is a representative view of the central casing and of the cartridge assembly, showing an embodiment according to the invention, with the exhaust casing partially removed; FIG. 4 is a second view of the central casing and of the cartridge assembly with the cut-out insert to reveal the blades of the nozzle with variable geometry; FIG. 5 is a representative view from below of the arms of the blades with variable geometry, of the ring in partial unison and of the assembly of the blade crank 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.Referring to the drawing, the embodiment of the invention shown in Figure 1 includes a compressor housing 10 which is connected to a back plate 12 using two or more clamps 14 secured by bolts 16. The back plate is fixed to a central casing 18 with several bolts 20 and an annular seal 22. For the embodiment shown, the sheet metal exhaust casing 24 is connected to the central casing using bands 26 fixed by bolts 28. The gases from exhaust or other high-energy gases supplying the turbocharger enter the exhaust casing through the inlet 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 best seen in Figures 2a, 2b, 3 and 4, a cartridge, generally designated by 34, is mounted on the central housing. A turbine wheel and shaft assembly 30 is carried by the bearing, the turbine wheel being suspended inside the cartridge. Multiple blades 36 are mounted on a cartridge base 38. The blades pivot on posts 40 extending from the blades into holes 42 in a surface 43 of the base which constitutes the internal wall of the inlet nozzle. Arms actuator 44 extend from the posts of the blades to engage. in notches 46 in the ring in unison 48. An actuating crank 50 ends at a first end by a lever arm 52 carrying a pin 54 to engage with the slot 56 in the ring in unison for the rotation of the ring. The crank extends from a boss 58 in the central casing passing through a sleeve 60 ending on an external 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 insert 64, better represented in FIGS. 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 (better seen in FIG. 1) received in the central casing. An edge 71 which extends around the circumference of the insert is also engaged by the V-shaped band clamp. The insert comprises the external wall of the nozzle 72 in the immediate vicinity of the blades. In addition, the insert constitutes the exhaust gas outlet from the turbine 73 with an aerodynamic contour fixing the blades on the wheel of the turbine. The insert and the base with the fixed vanes 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 compared to the designs of the prior art, facilitating improvements such as a sheet metal exhaust casing, as shown in the embodiments of the drawings.
En revenant à la figure 1, un système de roulement comportant deux roulements 74 et une pièce d'ecartement 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. 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. Returning to FIG. 1, a bearing system comprising two bearings 74 and a spacer bearing 76 or, in other embodiments, a unitary bearing, - supports the mounting of the shaft wheel in the central bore of the central casing - 78. The shaft further extends through a ring d 'support 80 which engages with a support bearing 82 carried between the central casing and the rear plate of the compressor. A piston ring 84 closes the support ring with the shaft bore in the rear plate. The turbine of compressor 86 is fixed to the shaft wheel assembly. Having now fully described the invention as required by the patent statutes, those skilled in the art will be able to note modifications and variants to the specific embodiment described herein. These modifications and variants fall within the scope of the invention as defined in the following claims.

Claims

REVENDICATIONS
1. Turbocompresseur à géométrie variable comprenant : un carter central (18) ayant un alésage central portant un montage de roulement (74) ; une roue de turbine fixée à un arbre . s 'étendant à travers le carter central (18), soutenue par le montage de roulement (74), l'arbre étant fixé de manière distale par rapport à la roue de turbine à une turbine de compresseur (86) ; une cartouche (34) possédant une embase (38) comportant un gicleur interne et une pièce d'insertion (64) fixée à l'embase (38), la pièce d'insertion (64) comportant une paroi externe du gicleur (72) en relation espacée avec la paroi interne du gicleur et une sortie d'échappement avec des contours aérodynamiques correspondant sensiblement à la roue de* turbine, la cartouche (34) supportant une pluralité d'aubes (36) entre les parois interne et externe du gicleur et comportant en outre des moyens pour faire tourner lesdites aubes ; un carter de compresseur (10) possédant une entrée d'air et une sortie d'air comprimé, le carter de compresseur (10) étant fixé au carter central (18) à l'opposé de ladite cartouche et enfermant la turbine du compresseur (86) ; un carter' d'échappement (24) comportant une entrée pour les gaz d'échappement et une sortie, le carter d'échappement (24) étant fixé à l'extérieur de la cartouche (34) par rapport au carter central (18) . 1. A variable geometry turbocharger comprising: a central casing (18) having a central bore carrying a bearing assembly (74); a turbine wheel attached to a shaft. extending through the central casing (18), supported by the bearing assembly (74), the shaft being fixed distally with respect to the turbine wheel to a compressor turbine (86); a cartridge (34) having a base (38) comprising an internal nozzle and an insert (64) fixed to the base (38), the insert (64) comprising an external wall of the nozzle (72) in spaced relation to the internal wall of the nozzle and an exhaust outlet with aerodynamic contours corresponding substantially to the turbine wheel, the cartridge (34) supporting a plurality of blades (36) between the internal and external walls of the nozzle and further comprising means for rotating said vanes; a compressor housing (10) having an air inlet and a compressed air outlet, the compressor housing (10) being fixed to the central housing (18) opposite said cartridge and enclosing the compressor turbine ( 86); an exhaust casing (24) having an inlet for the exhaust gases and an outlet, the exhaust casing (24) being fixed outside the cartridge (34) relative to the central casing (18) .
2. Turbocompresseur à géométrie variable selon la revendication 1, caractérisé en ce que les moyens pour faire tourner les aubes (36) comprennent : des poteaux de rotation (40) s ' étendant depuis une première surface de chaque aube (36) sensiblement parallèlement à la paroi interne du gicleur, les poteaux (40) étant reçus dans des ouvertures circonferentiellement espacées dans la paroi interne du gicleur ; des bras d' actionnement (44) s ' étendant depuis les poteaux (40) ; une bague à l'unisson (48) intermédiaire entre le carter central (18) et l'embase (38), la bague à l'unisson (48) comportant une pluralité d'encoches (46) en nombre égal aux aubes (36), lesdites encoches (46) recevant les bras (44), la bague à l'unisson (48) comportant en outre une fente (56) ; une manivelle (40) comportant un bras d' actionnement (44) s ' engageant avec la fente (56), la manivelle (40) étant mobile en continu depuis une première position jusqu'à une deuxième position, le mouvement de la manivelle (40) provoquant le déplacement du bras d' actionnement (44) dans la fente (56) et communiquant une force perpendiculaire à la fente (56) pour entraîner le mouvement de rotation de la bague à l'unisson (48), le mouvement de rotation de la bague à l'unisson (48) provoquant la rotation des bras d'aubes (44) avec les encoches (46) ; et des moyens pour déplacer la manivelle (50) . 2. Turbocharger with variable geometry according to claim 1, characterized in that the means for rotating the blades (36) comprise: rotation posts (40) extending from a first surface of each blade (36) substantially parallel to the internal wall of the nozzle, the posts (40) being received in circumferentially spaced openings in the internal wall of the nozzle; actuating arms (44) extending from the posts (40); a ring in unison (48) intermediate between the central casing (18) and the base (38), the ring in unison (48) comprising a plurality of notches (46) equal in number to the blades (36 ), said notches (46) receiving the arms (44), the unison ring (48) further comprising a slot (56); a crank (40) comprising an actuating arm (44) engaging with the slot (56), the crank (40) being continuously movable from a first position to a second position, the movement of the crank ( 40) causing the movement of the actuating arm (44) in the slot (56) and imparting a force perpendicular to the slot (56) to cause the rotational movement of the ring in unison (48), the movement of rotation of the ring in unison (48) causing the rotation of the blade arms (44) with the notches (46); and means for moving the crank (50).
3. Turbocompresseur à géométrie variable selon la revendication 1, caractérisé en ce que le carter d'échappement (24) est formé d'une tôle. 3. Variable geometry turbocharger according to claim 1, characterized in that the exhaust casing (24) is formed of a sheet.
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)

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

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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)
WO (1) WO2002006637A1 (en)

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DE60039723D1 (en) 2008-09-11
JP2004505190A (en) 2004-02-19
WO2002006637A1 (en) 2002-01-24
CN1304732C (en) 2007-03-14
KR100669487B1 (en) 2007-01-16
HUP0301321A2 (en) 2003-08-28
EP1303683B2 (en) 2012-09-19
US6951450B1 (en) 2005-10-04
AU2000265774A1 (en) 2002-01-30
CA2416331A1 (en) 2002-01-24
JP4846961B2 (en) 2011-12-28
BR0017293A (en) 2003-07-29
CA2416331C (en) 2009-10-20
MXPA03000497A (en) 2004-09-10
EP1303683B1 (en) 2008-07-30
KR20030020389A (en) 2003-03-08
CN1433501A (en) 2003-07-30
ATE403068T1 (en) 2008-08-15
BR0017293B1 (en) 2008-11-18

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