EP1319805A1 - Rotor or rotor element for turbocompressors - Google Patents

Rotor or rotor element for turbocompressors Download PDF

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Publication number
EP1319805A1
EP1319805A1 EP01870278A EP01870278A EP1319805A1 EP 1319805 A1 EP1319805 A1 EP 1319805A1 EP 01870278 A EP01870278 A EP 01870278A EP 01870278 A EP01870278 A EP 01870278A EP 1319805 A1 EP1319805 A1 EP 1319805A1
Authority
EP
European Patent Office
Prior art keywords
rotor
blades
series
crowns
feet
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.)
Withdrawn
Application number
EP01870278A
Other languages
German (de)
French (fr)
Inventor
Dante Benedetto
Jack-Pierre Lauvergnat
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.)
Safran Aero Boosters SA
Original Assignee
Techspace Aero SA
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
Application filed by Techspace Aero SA filed Critical Techspace Aero SA
Priority to EP01870278A priority Critical patent/EP1319805A1/en
Priority to US10/323,863 priority patent/US20030143078A1/en
Publication of EP1319805A1 publication Critical patent/EP1319805A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3053—Fixing blades to rotors; Blade roots ; Blade spacers by means of pins
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • F04D29/322—Blade mountings

Definitions

  • the present invention relates to compressors, especially to turbochargers.
  • Turbochargers are well known in the state of the art and are used in particular for twin-engine engines, turbofan engines and turbojets.
  • turbochargers which can be low pressure type or high pressure type, are, essentially, consisting of a succession of floors rotor blades alternating with stages stator blades (also called floors) Rectifiers).
  • the series of moving blades of the different rotor stages successive compressors are fixed on one and single rotor element or rotor.
  • At the periphery of the said rotor are machined a succession of grooves that allow the entrenchment of the feet of the blades of different rotor stages.
  • this rotor will comprise, disposed at its periphery, several annular grooves.
  • the rotor will therefore include, arranged in a first radius in a circular manner, a first gorge in which will be arranged a first series of blades to form a first rotor stage.
  • the rotor will then include, arranged at a certain distance from the first gorge (which corresponds to the width of a rectifier stage), a second throat in which will be arranged a second series of blades of to form a second rotor stage, and thus to after.
  • the latter is provided with at least one notch or radial opening which allows the successive insertion of feet of the series of moving blades.
  • blocking means such as locks are used to block the foot of this last dawn moving. These locking means allow also avoid moving the feet of the series of moving blades within the annular groove.
  • the means of blocking, and particular locks, used to immobilize blades in the corresponding grooves cause disturbances of the aerodynamic vein of the fluid, which generates loss of charge and harmful vibrations at smooth operation of the turbocharger.
  • a last major disadvantage of the presence of such blocking devices lies in the ovalization of the rotor after a certain period of operation.
  • This platform or platinum aims to increase the rigidity of the blade / foot set of dawn mobile.
  • the present invention aims to remedy disadvantages stated above of the rotors of known turbochargers, by providing a rotor of new design intended more particularly for a low pressure compressor.
  • the present invention aims to to propose a solution that avoids the problem of double wall created within a drum serving as a rotor and especially in a monobloc type drum or multiblock.
  • the present invention also aims to allow for simplification and simplification of realization of the blades.
  • the present invention aims to propose a solution in which the attachment of the blades in the rotor grooves is simplified and does not require plus the use of blocking elements such as locks generating disturbances.
  • the present invention relates to a rotor or rotor element for a turbocharger, constituting supporting at least one rotor blade stage, in which at least one groove is provided to allow the engagement of the feet of a series of moving blades, characterized in that said blades are not no platform or platinum.
  • the blades are directly connected to a foot, presenting either a dovetail shape, a flat shape. This allows advantageously to eliminate the problem of the presence of a double wall for the aerodynamic vein at the turbocharger operation.
  • the rotor has additional features that still make it possible to improve the present invention in standardizing the aerodynamic vein. For this purpose, we avoid the presence of lateral notches for introducing vanes mobile and therefore locks.
  • said rotor or rotor element includes at least two individual crowns comprising their lateral periphery of the half-profiles which, during the juxtaposition of individual crowns, realize a complete throat in which are engaged the feet of a series of blades. Each gorge is delimited by lips or edges.
  • Half-profile means a form that delimits laterally said crown and which allows recreate a complete gorge with a bottom or not when one docks or juxtaposes two crowns successive.
  • This profile can be constituted in the form of a half-cell or half-groove or in planar form.
  • the invention relates to a rotor or rotor element for a turbocharger comprising a single rotor stage with a single series of blades.
  • the rotor is essentially annular and is formed of two annular crowns which are juxtaposed.
  • Half profiles are arranged laterally on the periphery of each of the crowns, so that the half-profiles of a crown are next to the half-profiles of the consecutive crown to restore the throat intended for receive the feet of the series of moving blades of the floor rotor.
  • the fixation of the two rotor crowns can be achieved by any known means suitable and is preferably made removable. In this Indeed, it can for example be achieved by welding, at by means of rivets or by means of screws.
  • a means of fixing the crowns which is removable.
  • the use of a removable fastening means the advantage of allowing the replacement of a dawn deteriorated for example.
  • the two consecutive crowns are removably attached to one another by a assembly of bolts and nuts passing through flanges integral with said crowns.
  • the half-profiles of the crown have a shape such as the throat formed by the juxtaposition of the two half-profiles will have a shape complementary to the profile of the feet of the series of blades that will be housed or engaged in said throat.
  • the half-profiles of the crown have a shape of half-cells, so that the throat formed by the juxtaposition both half-profiles have a dovetail profile which will correspond to the profile of the so-called shaped feet of the series of blades that will be housed or engaged in said throat.
  • the half-profiles of crowns have a flat shape so that the throat formed by the juxtaposition of the two half-profiles present a groove that allows the rectilinear feet or planes of the series of blades to be housed there.
  • the immobilization of the series of blades within a throat can then be advantageously obtained by any appropriate means, for example to using a locking screw passing through the rotor.
  • this invention relates to a turbocharger rotor comprising a succession of rotor stages, the rotor being common in this case to several floors with several series of blades.
  • the turbocharger includes two series of moving blades and the rotor comprises a crown intermediate and two end crowns.
  • the crown intermediary has on each of its faces half-profiles that correspond to the half-profiles present on each of the end crowns so as to reconstitute during assembly the two complete grooves for the embedding of the two series of blades of two successive rotor stages.
  • the invention also relates to a turbocharger comprising a stator and a rotor compliant to the invention, as defined above.
  • the stator comprises one or more stages of fixed vanes, alternating with the rotor blade stages of the rotor.
  • the turbocharger according to the invention can for example be a turbofan, a turbojet or a gas turbine coupled to an alternator for the electricity production.
  • the invention has many advantages, both with regard to the construction of the rotors and the operation of turbochargers.
  • Rotor construction is simpler and more economical because it no longer imposes expensive machining of grooves complete in the rotor or that of blade supports correspondents.
  • it removes the need to make side openings through the rotor for the passage of the blades, which simplifies the construction of the rotor and avoids the presence of high stress areas in the rotor.
  • the invention has the advantage additional reduction of pressure losses in fluid flow, to reduce vibrations in the turbochargers and especially reduce or remove ovalization of the rotor in operation. All others other things being equal, it presents as well the advantage of improving the efficiency of turbochargers and to reduce the mechanical stresses to which they are subject.
  • This invention also has the advantage to provide a lighter rotor assembly by the presence of a single wall instead of a double wall as in the state of the art.
  • Figure 1 represents a general view of a classic turbocharger.
  • Figure 2 is a cross-sectional view of a part of a rotor according to the state of the art.
  • FIG. 3 is an exploded view, in elevation, of a part of a rotor showing the elements of blocking constituted by the locks used to secure the last dawn in a throat according to the state of the art.
  • FIG. 4 represents a sectional view cross-section of a rotor according to the state of the art.
  • Figure 5 is a cross-sectional view of a rotor according to an embodiment which combines two forms particular embodiments of the present invention.
  • the floor of compression of a turbofan is conventionally composed of a series of rotor stages 3,3 ', 3 ", ... alternating with a series of stator stages or rectifiers 2,2 ', 2 ", ...
  • the gas When the turbofan is running, the gas first crosses the first stage rectifier 2 of compressor where its velocity vector is repositioned so to be driven by the second rotor stage 3 'of blades rotating before joining the second stage rectifier 2 'to be repositioned in 3 ", etc. Gas undergoes a training cycle - repositioning to the outcome of which its kinetic energy decreases gradually while its pressure increases.
  • Each rotor stage 3,3 ', 3 ", ... comprises a series of blades 70,71,72, ... and each floor rectifier or stator 2.2 ', 2 ", ... includes a series of fixed blades respectively 60,61,62, ...
  • Each stage rectifier 2,2 ', 2 ", ... includes in addition an inner ring respectively 4,4 ', 4 ", ... connected to an outer ring respectively 5,5 ', 5 ", ... by the series of fixed blades respectively 60,61,62, ...; 60 ', 61', 62 ', ... or 60 ", 61", 62 “, ... Said ferrules interior 4,4 ', 4 ", ... and said outer ferrules 5,5 ', 5 “, ... are therefore specific to each floor rectifiers 2,2 ', 2 ", ...
  • FIGS. 2 and 3 Such a rotor is shown in FIGS. 2 and 3 according to the technological background. It corresponds to a one-piece annular rotor 100, fixed transversely to a disk 15 (for example to be coupled to a motor).
  • the rotor 100 is generally made of titanium.
  • the throats 10,10 ', 10 "are machined at its periphery and correspond each with a rotor stage 3,3 ', 3 ", grooves 10,10', 10" are intended to receive feet 80,81,82, ...; 80 ', 81', 82 ', ... and 80 ", 81", 82 “, ... series successive blades 70,71,72, ...; 70 ', 71', 72 ', ... and 70 ", 71", 72 “, ...
  • Fig. 3 represents a throat 10 in which are housed successively the feet 80,81,82, ... 89 blades 70,71,72, ... 79 of a single rotor stage.
  • lateral openings 14 are in the throat 10. After the introduction of the last dawn 79, it is fixed by means of one or several locking elements 30,32.
  • Fig. 4 represents the rotor according to the state of the technique in which we have represented for different rotor stages 3,3 ', 3 "series of blades 70.70 ', 70 "made according to the state of the art.
  • These blades are blades having a platform or platen 90,90 ', 90 ".
  • each foot 80,80 'of dawn 70,70 ' is engaged in said groove 10,10', in such a way platform or platinum 90,90 'present at the level of the terminal part of the 70.70 'moving blade above the foot is able to rest on the lips or ledges of said throat.
  • turntables generates the presence of a double wall in the aerodynamic vein, one of the walls being constituted directly by the rotor 100 constituting the support of the different floors rotor and the other wall consisting of the 90,90 'platforms of 70,70' moving blades, ....
  • FIG. 5 a rotor according to the present invention. It represents a frame of mind in which two rotor stages are shown.
  • the first rotor stage 3 is constituted a series of blades 70,71, ... all similar and having a foot 80,81, ... straight or flat, while the second rotor stage 3 'has vanes 70 ', 71', ... all similar and having a foot 80 ', 81', ... shaped like a dovetail.
  • the grooves 10 and 10 'intended to receive the feet first and second stages 3 and 3 ' are formed of different way.
  • the blades mobile devices do not have a platform or platinum, which allows from the rotor profile 100 to generate directly the aerodynamic vein.
  • the various series of blades 70,71, ...; 70 ', 71', ... have a functional part consisting of a pale directly in contact with the corresponding foot 80,81, ...; 80 ', 81', ... without the presence of platforms or platinum extending substantially perpendicular to said dawn.
  • the rotor 100 is consisting of at least two crowns, and in this case of three crowns 20, 21 and 22.
  • the intermediate ring 21 has on each of its lateral faces an annular half-profile 111, 110 ', while the end rings 20 and 22 present on only one of their two lateral faces a half-profile annular 110, respectively 111 'corresponding to that (111, respectively 110 ') disposed opposite on the crown to which he is juxtaposed.
  • the juxtaposition of these half-profiles 110,111; 110 ', 111' will make a throat complete 10,10 'allowing the insertion of the feet 80,81, ... or 80 ', 81', ... series of blades 70,71, ... or 70 ', 71', ....
  • the crowns 20,21,22 are joined to each other so as to form the rotor 100 completely.
  • the fixing of the various crowns is carried out using any appropriate means.
  • profiles of the throats and therefore the half-profiles constituting them can take forms various and other than those mentioned in both preferred execution examples. These profiles can be of shape dovetail, circular or polygonal. Similarly, the feet of the blades can also be shaped dovetail, circular or polygonal, provided that that the profile of said feet of said blades is complementary and corresponds to that of said grooves.

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

The turbocharger rotor comprises the support for a stage (3,3') comprising a series of movable blades (70,70') in which there is a groove for the engagement of the feet (80,80') of the blades. The blades do not have any plate extending perpendicularly to them. The rotor comprises individual crown wheels (20,21,22) having half sections (110,110') in their lateral periphery which during juxtaposition of the crown wheels make the complete groove.

Description

Objet de l'inventionObject of the invention

La présente invention se rapporte aux compresseurs, spécialement aux turbocompresseurs.The present invention relates to compressors, especially to turbochargers.

Elle concerne plus particulièrement les rotors des turbocompresseurs.It concerns more particularly the Turbocharger rotors.

Etat de la techniqueState of the art

Les turbocompresseurs sont bien connus dans l'état de la technique et sont utilisés notamment pour les moteurs à double corps, les turbosoufflantes et les turboréacteurs.Turbochargers are well known in the state of the art and are used in particular for twin-engine engines, turbofan engines and turbojets.

Ces turbocompresseurs, qui peuvent être du type à basse pression ou du type à haute pression, sont, pour l'essentiel, constitués d'une succession d'étages rotoriques d'aubes mobiles en alternance avec des étages statoriques d'aubes fixes (également dénommés étages redresseurs).These turbochargers, which can be low pressure type or high pressure type, are, essentially, consisting of a succession of floors rotor blades alternating with stages stator blades (also called floors) Rectifiers).

Dans le cas des compresseurs basse pression, les séries d'aubes mobiles des différents étages rotoriques successifs des compresseurs sont fixées sur un seul et unique élément rotorique ou rotor. A la périphérie dudit rotor sont usinées une succession de gorges qui permettent l'enchâssement des pieds des aubes mobiles des différents étages rotoriques.In the case of low pressure compressors, the series of moving blades of the different rotor stages successive compressors are fixed on one and single rotor element or rotor. At the periphery of the said rotor are machined a succession of grooves that allow the entrenchment of the feet of the blades of different rotor stages.

Dans le cas où un rotor est commun à plusieurs étages rotoriques, par exemple trois ou quatre, ce rotor comprendra, disposées à sa périphérie, plusieurs gorges annulaires.In the case where a rotor is common to several rotor stages, for example three or four, this rotor will comprise, disposed at its periphery, several annular grooves.

Plus précisément, le rotor comprendra donc, disposée selon un premier rayon de manière circulaire, une première gorge dans laquelle sera disposée une première série d'aubes mobiles de manière à constituer un premier étage rotorique.More precisely, the rotor will therefore include, arranged in a first radius in a circular manner, a first gorge in which will be arranged a first series of blades to form a first rotor stage.

Le rotor comprendra ensuite, disposée à une certaine distance de la première gorge (qui correspond à la largeur d'un étage redresseur), une seconde gorge dans laquelle sera disposée une seconde série d'aubes mobiles de manière à constituer un second étage rotorique, et ainsi de suite.The rotor will then include, arranged at a certain distance from the first gorge (which corresponds to the width of a rectifier stage), a second throat in which will be arranged a second series of blades of to form a second rotor stage, and thus to after.

Cependant, pour permettre l'enchâssement des pieds de la série d'aubes mobiles dans la gorge annulaire, cette dernière est munie d'au moins une encoche ou ouverture radiale qui permet l'insertion successive des pieds de la série d'aubes mobiles.However, to allow the entrenchment of feet of the series of moving blades in the annular groove, the latter is provided with at least one notch or radial opening which allows the successive insertion of feet of the series of moving blades.

Après placement de la dernière aube de la série, des moyens de blocage appropriés tels que des verrous sont utilisés pour bloquer le pied de cette dernière aube mobile. Ces moyens de blocage permettent également d'éviter tout déplacement des pieds de la série d'aubes mobiles au sein même de la gorge annulaire.After placing the last dawn of the series, appropriate blocking means such as locks are used to block the foot of this last dawn moving. These locking means allow also avoid moving the feet of the series of moving blades within the annular groove.

Cette conception des rotors connus est coûteuse et complexe à réaliser. En outre, les ouvertures ou encoches percées dans le fond des gorges fragilisent particulièrement le rotor, ce qui bien entendu constitue un désavantage supplémentaire.This design of known rotors is expensive and complex to achieve. In addition, openings or notches pierced in the bottom of the throats weaken particularly the rotor, which of course constitutes a additional disadvantage.

Enfin, les moyens de blocage, et en particulier les verrous, utilisés pour immobiliser les aubes dans les gorges correspondantes provoquent des perturbations de la veine aérodynamique du fluide, ce qui génère des pertes de charges et des vibrations nocives au bon fonctionnement du turbocompresseur.Finally, the means of blocking, and particular locks, used to immobilize blades in the corresponding grooves cause disturbances of the aerodynamic vein of the fluid, which generates loss of charge and harmful vibrations at smooth operation of the turbocharger.

Un dernier inconvénient très important de la présence de tels dispositifs de blocage réside dans l'ovalisation du rotor après une certaine période de fonctionnement.A last major disadvantage of the presence of such blocking devices lies in the ovalization of the rotor after a certain period of operation.

Un autre problème important réside dans le fait que les aubes et en particulier les aubes mobiles présentent une plate-forme ou platine située entre le pied et la pale (corps de l'aube).Another important problem is the fact that the blades and in particular the blades have a platform or platinum located between the foot and the blade (body of dawn).

Cette plate-forme ou platine a pour but d'augmenter la rigidité de l'ensemble pale/pied de l'aube mobile.This platform or platinum aims to increase the rigidity of the blade / foot set of dawn mobile.

Néanmoins, le principal inconvénient d'une telle plate-forme ou platine réside dans la présence d'une double paroi comprenant une première paroi correspondant au voile du rotor et une deuxième paroi. En effet cette deuxième paroi, bien que garantissant la veine aeérodynamique, génère une augmentation de matière et de masse au niveau du rotor.Nevertheless, the main drawback of a such platform or platinum lies in the presence of a double wall comprising a first wall corresponding to the rotor sail and a second wall. Indeed this second wall, although guaranteeing the vein aerodynamic, generates an increase in matter and mass at the rotor.

Buts de l'inventionGoals of the invention

La présente invention vise à remédier aux inconvénients énoncés plus haut des rotors des turbocompresseurs connus, en fournissant un rotor de conception nouvelle destiné plus particulièrement à un compresseur basse pression.The present invention aims to remedy disadvantages stated above of the rotors of known turbochargers, by providing a rotor of new design intended more particularly for a low pressure compressor.

Plus précisément, la présente invention vise à proposer une solution qui s'affranchisse du problème de double paroi créée au sein d'un tambour servant de rotor et en particulier au sein d'un tambour de type monobloc ou multibloc. More specifically, the present invention aims to to propose a solution that avoids the problem of double wall created within a drum serving as a rotor and especially in a monobloc type drum or multiblock.

La présente invention vise également à permettre un allègement et une simplification de réalisation des aubes mobiles.The present invention also aims to allow for simplification and simplification of realization of the blades.

Enfin, la présente invention vise à proposer une solution dans laquelle la fixation des aubes mobiles dans les gorges du rotor est simplifiée et ne nécessite plus l'utilisation d'éléments de blocage tels que des verrous générateurs de perturbations.Finally, the present invention aims to propose a solution in which the attachment of the blades in the rotor grooves is simplified and does not require plus the use of blocking elements such as locks generating disturbances.

Principaux éléments caractéristiques de l'inventionMain characteristic elements of the invention

La présente invention se rapporte à un rotor ou élément rotorique pour un turbocompresseur, constituant le support d'au moins un étage rotorique d'aubes mobiles, dans lequel est prévue au moins une gorge pour permettre l'engagement des pieds d'une série d'aubes mobiles, caractérisé en ce que lesdites aubes mobiles ne présentent pas de plate-forme ou platine. De cette manière, les aubes sont directement reliées à un pied, présentant soit une forme en queue d'aronde, soit une forme plane. Ceci permet avantageusement d'éliminer le problème de la présence d'une double paroi pour la veine aérodynamique lors du fonctionnement du turbocompresseur.The present invention relates to a rotor or rotor element for a turbocharger, constituting supporting at least one rotor blade stage, in which at least one groove is provided to allow the engagement of the feet of a series of moving blades, characterized in that said blades are not no platform or platinum. In this way, the blades are directly connected to a foot, presenting either a dovetail shape, a flat shape. this allows advantageously to eliminate the problem of the presence of a double wall for the aerodynamic vein at the turbocharger operation.

De manière particulièrement avantageuse, le rotor présente des caractéristiques supplémentaires qui permettent encore d'améliorer la présente invention en uniformisant la veine aérodynamique. Dans ce but, on évite la présence d'encoches latérales d'introduction des aubes mobiles et donc de verrous.In a particularly advantageous way, the rotor has additional features that still make it possible to improve the present invention in standardizing the aerodynamic vein. For this purpose, we avoid the presence of lateral notches for introducing vanes mobile and therefore locks.

A cet effet, ledit rotor ou élément rotorique comprend au moins deux couronnes individuelles comprenant à leur périphérie latérale des demi-profils qui, lors de la juxtaposition des couronnes individuelles, réalisent une gorge complète dans laquelle sont engagés les pieds d'une série d'aubes mobiles. Chaque gorge est délimitée par des lèvres ou rebords.For this purpose, said rotor or rotor element includes at least two individual crowns comprising their lateral periphery of the half-profiles which, during the juxtaposition of individual crowns, realize a complete throat in which are engaged the feet of a series of blades. Each gorge is delimited by lips or edges.

On entend par demi-profil une forme qui délimite latéralement ladite couronne et qui permet de recréer une gorge complète présentant un fond ou non lorsque l'on accoste ou juxtapose deux couronnes successives.Half-profile means a form that delimits laterally said crown and which allows recreate a complete gorge with a bottom or not when one docks or juxtaposes two crowns successive.

Ce profil pourra être constitué sous la forme d'une demi-alvéole ou demi-rainure ou sous forme plane.This profile can be constituted in the form of a half-cell or half-groove or in planar form.

Selon une première forme d'exécution, l'invention se rapporte à un rotor ou élément rotorique pour turbocompresseur comprenant un seul étage rotorique avec une seule série d'aubes mobiles.According to a first embodiment, the invention relates to a rotor or rotor element for a turbocharger comprising a single rotor stage with a single series of blades.

Selon cette forme d'exécution préférée, le rotor est essentiellement annulaire et est formé de deux couronnes annulaires qui sont juxtaposées. Des demi-profils sont ménagés latéralement à la périphérie de chacune des couronnes, de telle sorte que les demi-profils d'une couronne se trouvent en regard des demi-profils de la couronne consécutive pour reconstituer la gorge destinée à recevoir les pieds de la série d'aubes mobiles de l'étage rotorique.According to this preferred embodiment, the rotor is essentially annular and is formed of two annular crowns which are juxtaposed. Half profiles are arranged laterally on the periphery of each of the crowns, so that the half-profiles of a crown are next to the half-profiles of the consecutive crown to restore the throat intended for receive the feet of the series of moving blades of the floor rotor.

Pour assembler les aubes sur le rotor, il suffit dès lors d'écarter les deux couronnes pour ouvrir la gorge, d'engager ensuite les pieds des aubes dans les demi-profils d'une des couronnes, puis de juxtaposer les deux couronnes pour refermer les demi-profils constituant la gorge et emprisonner les pieds d'une série d'aubes mobiles successives. Les deux couronnes sont ensuite solidarisées par des moyens propres.To assemble the blades on the rotor, it It is therefore sufficient to remove the two crowns to open the groove, then engage the blade roots in the half-profiles one of the crowns, then juxtapose the two crowns to close the half-profiles constituting the throat and imprison the feet of a series of moving blades successive. The two crowns are then joined by own means.

Avantageusement, la fixation des deux couronnes du rotor peut être réalisée par tout moyen connu approprié et est de préférence rendue amovible. A cet effet, elle peut par exemple être réalisée par soudure, au moyen de rivets ou au moyen de vis.Advantageously, the fixation of the two rotor crowns can be achieved by any known means suitable and is preferably made removable. In this Indeed, it can for example be achieved by welding, at by means of rivets or by means of screws.

Selon l'invention, on préfère toutefois faire usage d'un moyen de fixation des couronnes, qui soit amovible. L'usage d'un moyen de fixation amovible présente l'avantage de permettre le remplacement d'une aube détériorée par exemple.According to the invention, however, it is preferred to use of a means of fixing the crowns, which is removable. The use of a removable fastening means the advantage of allowing the replacement of a dawn deteriorated for example.

A cet effet, dans une forme de réalisation avantageuse de l'invention, les deux couronnes consécutives sont fixées l'une à l'autre de manière amovible, par un assemblage de boulons et d'écrous traversant des brides solidaires desdites couronnes.For this purpose, in one embodiment advantageous of the invention, the two consecutive crowns are removably attached to one another by a assembly of bolts and nuts passing through flanges integral with said crowns.

Selon la présente invention, les demi-profils de la couronne présentent une forme telle que la gorge formée par la juxtaposition des deux demi-profils présentera une forme complémentaire du profil des pieds de la série d'aubes mobiles qui seront logés ou engagés dans ladite gorge.According to the present invention, the half-profiles of the crown have a shape such as the throat formed by the juxtaposition of the two half-profiles will have a shape complementary to the profile of the feet of the series of blades that will be housed or engaged in said throat.

Selon une autre forme d'exécution, les demi-profils de la couronne présentent une forme de demi-alvéoles, de sorte que la gorge formée par la juxtaposition des deux demi-profils présente un profil en queue d'aronde qui correspondra au profil des pieds dits à forme de la série d'aubes mobiles qui seront logés ou engagés dans ladite gorge.According to another embodiment, the half-profiles of the crown have a shape of half-cells, so that the throat formed by the juxtaposition both half-profiles have a dovetail profile which will correspond to the profile of the so-called shaped feet of the series of blades that will be housed or engaged in said throat.

De manière alternative, les demi-profils des couronnes présentent une forme plane de sorte que la gorge formée par la juxtaposition des deux demi-profils présente une rainure qui permet aux pieds rectilignes ou plans de la série d'aubes mobiles d'y être logés.Alternatively, the half-profiles of crowns have a flat shape so that the throat formed by the juxtaposition of the two half-profiles present a groove that allows the rectilinear feet or planes of the series of blades to be housed there.

L'immobilisation de la série d'aubes mobiles au sein d'une gorge peut ensuite être avantageusement obtenue à l'aide de tout moyen adéquat, par exemple à l'aide d'une vis de blocage traversant le rotor. The immobilization of the series of blades within a throat can then be advantageously obtained by any appropriate means, for example to using a locking screw passing through the rotor.

Selon l'autre forme d'exécution, la présente invention se rapporte à un rotor pour turbocompresseur comprenant une succession d'étages rotoriques, le rotor étant commun dans ce cas à plusieurs étages avec plusieurs séries d'aubes mobiles. Dans le cas particulier d'un compresseur présentant un rotor commun à deux étages rotoriques, le turbocompresseur comprend deux séries d'aubes mobiles et le rotor comprend une couronne intermédiaire et deux couronnes d'extrémité. La couronne intermédiaire présente sur chacune de ses faces des demi-profils qui correspondent aux demi-profils présents sur chacune des couronnes d'extrémité de manière à reconstituer lors de l'assemblage les deux gorges complètes pour l'enchâssement des deux séries d'aubes mobiles des deux étages rotoriques successifs.According to the other embodiment, this invention relates to a turbocharger rotor comprising a succession of rotor stages, the rotor being common in this case to several floors with several series of blades. In the particular case of a compressor having a common two-stage rotor rotor, the turbocharger includes two series of moving blades and the rotor comprises a crown intermediate and two end crowns. The crown intermediary has on each of its faces half-profiles that correspond to the half-profiles present on each of the end crowns so as to reconstitute during assembly the two complete grooves for the embedding of the two series of blades of two successive rotor stages.

La généralisation de ce principe à plusieurs étages rotoriques (trois, quatre ou cinq) peut bien entendu être aisément comprise par l'homme de l'art.The generalization of this principle to several rotor stages (three, four or five) can of course be easily understood by those skilled in the art.

L'invention concerne également un turbocompresseur comprenant un stator et un rotor conforme à l'invention, tel que défini plus haut.The invention also relates to a turbocharger comprising a stator and a rotor compliant to the invention, as defined above.

Dans le turbocompresseur selon l'invention, le stator comprend un ou plusieurs étages d'aubes fixes, alternant avec les étages d'aubes tournantes du rotor.In the turbocharger according to the invention, the stator comprises one or more stages of fixed vanes, alternating with the rotor blade stages of the rotor.

Le turbocompresseur selon l'invention peut par exemple être une turbosoufflante, un turboréacteur ou une turbine à gaz couplée à un alternateur pour la production d'électricité.The turbocharger according to the invention can for example be a turbofan, a turbojet or a gas turbine coupled to an alternator for the electricity production.

L'invention présente de multiples avantages, à la fois en ce qui concerne la construction des rotors et le fonctionnement des turbocompresseurs. D'une part, la construction des rotors est plus simple et plus économique du fait qu'elle n'impose plus un usinage coûteux de gorges complètes dans le rotor ni celui de supports d'aubes correspondants. D'autre part, elle supprime la nécessité de pratiquer des ouvertures latérales à travers le rotor pour le passage des aubes, ce qui simplifie la construction du rotor et évite la présence de zones à fortes contraintes dans le rotor. Ne nécessitant plus de verrous de retenue des aubes sur le rotor, l'invention présente l'avantage supplémentaire de réduire les pertes de charge dans l'écoulement du fluide, de réduire les vibrations dans les turbocompresseurs et surtout de réduire ou de supprimer l'ovalisation du rotor en fonctionnement. Toutes autres choses étant égales par ailleurs, elle présente ainsi l'avantage d'améliorer le rendement des turbocompresseurs et de réduire les sollicitations mécaniques auxquelles ils sont soumis.The invention has many advantages, both with regard to the construction of the rotors and the operation of turbochargers. On the one hand, Rotor construction is simpler and more economical because it no longer imposes expensive machining of grooves complete in the rotor or that of blade supports correspondents. On the other hand, it removes the need to make side openings through the rotor for the passage of the blades, which simplifies the construction of the rotor and avoids the presence of high stress areas in the rotor. No longer requiring locks blades on the rotor, the invention has the advantage additional reduction of pressure losses in fluid flow, to reduce vibrations in the turbochargers and especially reduce or remove ovalization of the rotor in operation. All others other things being equal, it presents as well the advantage of improving the efficiency of turbochargers and to reduce the mechanical stresses to which they are subject.

D'autre part, la fabrication des aubes mobiles sans plate-forme ou sans platine sera nettement plus aisée en comparaison avec la réalisation des aubes prévues dans les solutions de l'état de la technique.On the other hand, the manufacture of blades mobile without platform or without platinum will be clearly easier in comparison with the realization of the blades provided in the solutions of the state of the art.

Cette invention présente également l'avantage de fournir un ensemble rotorique plus léger par la présence d'une paroi unique au lieu d'une double paroi comme dans l'état de la technique.This invention also has the advantage to provide a lighter rotor assembly by the presence of a single wall instead of a double wall as in the state of the art.

Brève description des figuresBrief description of the figures

La figure 1 représente une vue générale d'un turbocompresseur classique.Figure 1 represents a general view of a classic turbocharger.

La figure 2 est une vue en coupe transversale d'une partie d'un rotor selon l'état de la technique.Figure 2 is a cross-sectional view of a part of a rotor according to the state of the art.

La figure 3 est une vue éclatée, en élévation, d'une partie d'un rotor montrant les éléments de blocage constitués pat des verrous utilisés pour fixer la dernière aube dans une gorge selon l'état de la technique.FIG. 3 is an exploded view, in elevation, of a part of a rotor showing the elements of blocking constituted by the locks used to secure the last dawn in a throat according to the state of the art.

La figure 4 représente une vue en coupe transversale d'un rotor selon l'état de la technique. FIG. 4 represents a sectional view cross-section of a rotor according to the state of the art.

La figure 5 est une vue en coupe transversale d'un rotor selon une réalisation qui combine deux formes d'exécution particulières de la présente invention.Figure 5 is a cross-sectional view of a rotor according to an embodiment which combines two forms particular embodiments of the present invention.

Description d'une forme d'exécution préférée de l'inventionDescription of a preferred embodiment of the invention

Dans ces figures, des mêmes notations de référence désignent des éléments identiques.In these figures, the same notations of reference designate identical elements.

Comme illustré à la figure 1, l'étage de compression d'un turbofan est classiquement composé d'une série d'étages rotoriques 3,3',3",... alternant avec une série d'étages statoriques ou redresseurs 2,2',2",...As shown in Figure 1, the floor of compression of a turbofan is conventionally composed of a series of rotor stages 3,3 ', 3 ", ... alternating with a series of stator stages or rectifiers 2,2 ', 2 ", ...

Lorsque le turbofan fonctionne, le gaz traverse d'abord le premier étage redresseur 2 du compresseur où son vecteur vitesse est repositionné afin d'être entraíné par le deuxième étage rotorique 3' d'aubes tournantes avant de rejoindre le deuxième étage redresseur 2' pour être à nouveau repositionné en 3", etc. Le gaz subit ainsi un cycle d'entraínement - repositionnement à l'issue duquel son énergie cinétique diminue progressivement tandis que sa pression croít.When the turbofan is running, the gas first crosses the first stage rectifier 2 of compressor where its velocity vector is repositioned so to be driven by the second rotor stage 3 'of blades rotating before joining the second stage rectifier 2 'to be repositioned in 3 ", etc. Gas undergoes a training cycle - repositioning to the outcome of which its kinetic energy decreases gradually while its pressure increases.

A la Fig. 1, pour chaque étage, on ne représente en coupe que la première aube 70, 70', 70" pour chaque étage rotorique ou 60, 60', 60" pour chaque étage redresseur.In FIG. 1, for each floor, we do not represents in section that the first blade 70, 70 ', 70 "for each rotor stage or 60, 60 ', 60 "for each stage rectifier.

Chaque étage rotorique 3,3',3",... comprend une série d'aubes mobiles 70,71,72,... et chaque étage redresseur ou statorique 2,2',2",... comprend une série d'aubes fixes respectivement 60,61,62,...Each rotor stage 3,3 ', 3 ", ... comprises a series of blades 70,71,72, ... and each floor rectifier or stator 2.2 ', 2 ", ... includes a series of fixed blades respectively 60,61,62, ...

Chaque étage redresseur 2,2',2",... comprend en outre une virole intérieure respectivement 4,4',4",... reliée à une virole extérieure respectivement 5,5',5",... par la série d'aubes fixes respectivement 60,61,62,...; 60',61',62',... ou 60",61",62", ... Lesdites viroles intérieures 4,4',4",... et lesdites viroles extérieures 5,5',5",... sont donc propres à chacun des étages redresseurs 2,2',2",...Each stage rectifier 2,2 ', 2 ", ... includes in addition an inner ring respectively 4,4 ', 4 ", ... connected to an outer ring respectively 5,5 ', 5 ", ... by the series of fixed blades respectively 60,61,62, ...; 60 ', 61', 62 ', ... or 60 ", 61", 62 ", ... Said ferrules interior 4,4 ', 4 ", ... and said outer ferrules 5,5 ', 5 ", ... are therefore specific to each floor rectifiers 2,2 ', 2 ", ...

Sur le rotor 100 sont fixées plusieurs séries d'aubes mobiles, respectivement 70,71,72; 70',71',72',... constituant autant d'étages rotoriques 3,3',3",... On a donc pour tous les étages rotoriques 3,3',3" un seul et même rotor 100 à la périphérie duquel sont creusées des gorges 10,10',10".On the rotor 100 are fixed several series moving blades, respectively 70,71,72; 70 ', 71', 72 ', ... constituting as many rotor stages 3,3 ', 3 ", ... We have therefore for all rotor stages 3,3 ', 3 "one and same rotor 100 on the periphery of which are dug 10,10 ', 10 "grooves.

Un tel rotor est représenté aux Figs. 2 et 3 selon l'arrière-plan technologique. Il correspond à un rotor annulaire monobloc 100, fixé transversalement à un disque 15 (destiné par exemple à être couplé à un moteur). Le rotor 100 est généralement en titane. Les gorges 10,10',10" sont usinées à sa périphérie et correspondent chacune à un étage rotorique 3,3',3". Les gorges 10,10',10" sont destinées à recevoir les pieds 80,81,82,...;80',81',82',... et 80",81",82",... des séries successives d'aubes mobiles 70,71,72,...;70',71',72',... et 70",71",72",...Such a rotor is shown in FIGS. 2 and 3 according to the technological background. It corresponds to a one-piece annular rotor 100, fixed transversely to a disk 15 (for example to be coupled to a motor). The rotor 100 is generally made of titanium. The throats 10,10 ', 10 "are machined at its periphery and correspond each with a rotor stage 3,3 ', 3 ", grooves 10,10', 10" are intended to receive feet 80,81,82, ...; 80 ', 81', 82 ', ... and 80 ", 81", 82 ", ... series successive blades 70,71,72, ...; 70 ', 71', 72 ', ... and 70 ", 71", 72 ", ...

La Fig. 3 représente une gorge 10 dans laquelle sont logés successivement les pieds 80,81,82,...89 des aubes mobiles 70,71,72,...79 d'un seul étage rotorique.Fig. 3 represents a throat 10 in which are housed successively the feet 80,81,82, ... 89 blades 70,71,72, ... 79 of a single rotor stage.

Dans ce but, des ouvertures latérales 14 sont pratiquées dans ladite gorge 10. Après l'introduction de la dernière aube 79, celle-ci est fixée à l'aide de un ou plusieurs éléments de blocage 30,32.For this purpose, lateral openings 14 are in the throat 10. After the introduction of the last dawn 79, it is fixed by means of one or several locking elements 30,32.

La Fig. 4 représente le rotor selon l'état de la technique dans lequel on a représenté pour les différents étages rotoriques 3,3',3" des séries d'aubes 70,70',70" réalisées selon l'état de la technique.Fig. 4 represents the rotor according to the state of the technique in which we have represented for different rotor stages 3,3 ', 3 "series of blades 70.70 ', 70 "made according to the state of the art.

Ces aubes sont des aubes présentant une plate-forme ou platine 90,90',90".These blades are blades having a platform or platen 90,90 ', 90 ".

On observe que chaque pied 80,80' d'aube 70,70' est engagé dans ladite gorge 10,10', de telle façon qu'une plate-forme ou platine 90,90' présente au niveau de la partie terminale de l'aube mobile 70,70' au-dessus du pied est capable de reposer sur les lèvres ou rebords de ladite gorge.It is observed that each foot 80,80 'of dawn 70,70 'is engaged in said groove 10,10', in such a way platform or platinum 90,90 'present at the level of the terminal part of the 70.70 'moving blade above the foot is able to rest on the lips or ledges of said throat.

Ces plates-formes ou platines 90,90',... sont essentiellement disposées perpendiculairement par rapport à la partie fonctionnelle (également dénommée pâle) de ladite aube.These platforms or plates 90,90 ', ... are essentially arranged perpendicularly to the functional part (also called pale) of the said dawn.

La présence de telles platines génère la présence d'une double-paroi dans la veine aérondynamique, l'une des parois étant constituée directement par le rotor 100 constituant le support des différents étages rotoriques et l'autre paroi étant constituée par les plates-formes 90,90' des aubes mobiles 70,70',....The presence of such turntables generates the presence of a double wall in the aerodynamic vein, one of the walls being constituted directly by the rotor 100 constituting the support of the different floors rotor and the other wall consisting of the 90,90 'platforms of 70,70' moving blades, ....

En vue de résoudre ce problème, on a représenté à la Fig. 5 un rotor conforme à la présente invention. Il représente une vue d'esprit dans lequel deux étages rotoriques sont représentés.In order to solve this problem, we have shown in FIG. 5 a rotor according to the present invention. It represents a frame of mind in which two rotor stages are shown.

Le premier étage rotorique 3 est constitué d'une série d'aubes mobiles 70,71,... toutes similaires et présentant un pied 80,81,... rectiligne ou plat, tandis que le deuxième étage rotorique 3' présente des aubes 70',71',... toutes similaires et ayant un pied 80',81',... en forme de queue d'aronde.The first rotor stage 3 is constituted a series of blades 70,71, ... all similar and having a foot 80,81, ... straight or flat, while the second rotor stage 3 'has vanes 70 ', 71', ... all similar and having a foot 80 ', 81', ... shaped like a dovetail.

En conséquence, ainsi que représenté à la figure, les gorges 10 et 10' destinées à recevoir les pieds des premier et second étages 3 et 3' sont conformées de manière différente.As a result, as shown in figure, the grooves 10 and 10 'intended to receive the feet first and second stages 3 and 3 'are formed of different way.

En pratique, cependant, on doit comprendre que l'on aura un seul et même profil pour les diverses gorges destinées à réaliser les différents étages rotoriques.In practice, however, one must understand that we will have one and the same profile for the various throats intended to achieve the different floors rotor.

Selon la présente invention, les aubes mobiles ne présentent pas de plate-forme ou de platine, ce qui permet à partir du profil du rotor 100 de générer directement la veine aérodynamique.According to the present invention, the blades mobile devices do not have a platform or platinum, which allows from the rotor profile 100 to generate directly the aerodynamic vein.

Ceci signifie que selon la présente invention les diverses séries d'aubes mobiles 70,71,...; 70',71',... présentent une partie fonctionnelle constituée par une pâle directement en contact avec le pied correspondant 80,81,...;80',81',... sans la présence de plates-formes ou platines s'étendant essentiellement perpendiculairement à ladite aube.This means that according to the present invention the various series of blades 70,71, ...; 70 ', 71', ... have a functional part consisting of a pale directly in contact with the corresponding foot 80,81, ...; 80 ', 81', ... without the presence of platforms or platinum extending substantially perpendicular to said dawn.

Selon une forme d'exécution particulièrement préférée de la présente invention, le rotor 100 est constitué d'au moins deux couronnes, et dans le présent cas de trois couronnes 20, 21 et 22.According to a particular embodiment preferred embodiment of the present invention, the rotor 100 is consisting of at least two crowns, and in this case of three crowns 20, 21 and 22.

Selon l'exemple d'exécution décrit à la Fig. 5, la couronne intermédiaire 21 présente sur chacune de ses faces latérales un demi-profil annulaire 111,110', tandis que les couronnes d'extrémité 20 et 22 présentent sur une seule de leurs deux faces latérales un demi-profil annulaire 110, respectivement 111' correspondant à celui (111, respectivement 110') disposé en face sur la couronne à laquelle il est juxtaposé. La juxtaposition de ces demi-profils 110,111; 110',111' permettra de réaliser une gorge complète 10,10' permettant l'insertion des pieds 80,81,... ou 80',81',... des séries d'aubes 70,71,... ou 70',71',....According to the execution example described in Fig. 5, the intermediate ring 21 has on each of its lateral faces an annular half-profile 111, 110 ', while the end rings 20 and 22 present on only one of their two lateral faces a half-profile annular 110, respectively 111 'corresponding to that (111, respectively 110 ') disposed opposite on the crown to which he is juxtaposed. The juxtaposition of these half-profiles 110,111; 110 ', 111' will make a throat complete 10,10 'allowing the insertion of the feet 80,81, ... or 80 ', 81', ... series of blades 70,71, ... or 70 ', 71', ....

Après placement desdits pieds desdites aubes dans les gorges correspondantes, les couronnes 20,21,22 sont solidarisées l'une à l'autre de manière à former le rotor 100 complètement.After placing said feet of said blades in the corresponding grooves, the crowns 20,21,22 are joined to each other so as to form the rotor 100 completely.

La fixation des diverses couronnes est réalisée à l'aide de tout moyen approprié.The fixing of the various crowns is carried out using any appropriate means.

Dans la figure représentée, on propose de réaliser des brides 115,115',116,116' dans lesquelles est prévue une ouverture par laquelle passe un ensemble tige-boulon-écrou 13,13'. In the figure shown, it is proposed to to make 115,115 ', 116,116' flanges in which is provided an opening through which passes a rod-bolt-nut assembly 13.13.

Concrètement, pour fixer les différentes séries d'aubes mobiles, il suffit de désolidariser les diverses couronnes 20,21,22, de les écarter pour ouvrir les gorges 10,10',..., d'insérer chaque série de pieds 80,81,82,... d'aubes mobiles 70,71,72,... entre les deux couronnes, puis de rapprocher et de juxtaposer à nouveau les couronnes 20,21 de manière à emprisonner et à immobiliser lesdits pieds dans les gorges respectives.Concretely, to fix the different series of moving blades, it is sufficient to separate the various crowns 20,21,22, to remove them to open the 10,10 'gorges, ..., to insert each set of feet 80,81,82, ... of moving blades 70,71,72, ... between the two crowns, then to reconcile and juxtapose again the crowns 20,21 so as to imprison and to immobilize said feet in the respective grooves.

On notera que les profils des gorges et donc les demi-profils les constituant peuvent prendre des formes diverses et autres que celles mentionnées dans les deux exemples d'exécution préférés. Ces profils peuvent être de forme en queue d'aronde, circulaire ou polygonale. De même, les pieds des aubes mobiles peuvent également être de forme en queue d'aronde, circulaire ou polygonale, pour autant que le profil desdits pieds desdites aubes mobiles soit complémentaire et corresponde à celui desdites gorges.It will be noted that the profiles of the throats and therefore the half-profiles constituting them can take forms various and other than those mentioned in both preferred execution examples. These profiles can be of shape dovetail, circular or polygonal. Similarly, the feet of the blades can also be shaped dovetail, circular or polygonal, provided that that the profile of said feet of said blades is complementary and corresponds to that of said grooves.

Claims (10)

Rotor (100) ou élément rotorique pour turbocompresseur, constituant le support d'au moins un étage rotorique (3,3') comprenant une série d'aubes mobiles (70,71,72,...; 70',71',72',...), dans lequel est prévue au moins une gorge (10,10') pour permettre un engagement des pieds (80,81,82,...;80',81',82',...) d'une série d'aubes mobiles, caractérisé en ce que lesdites aubes mobiles (70,71,72,...;70',71',72',...) ne présentent pas de plaque ou platine s'étendant essentiellement perpendiculairement à ladite aube.Rotor (100) or rotor element for a turbocharger, constituting the support of at least one rotor stage (3,3 ') comprising a series of blades (70,71,72, ...; 70', 71 ', 72 ', ...), in which at least one groove (10, 10') is provided to allow engagement of the feet (80, 81, 82, ..., 80 ', 81', 82 ', .. .) of a series of blades, characterized in that said blades (70,71,72, ...; 70 ', 71', 72 ', ...) do not have a plate or platinum s extending substantially perpendicular to said blade. Rotor ou élément rotorique selon la revendication 1, caractérisé en ce que ledit rotor ou élément rotorique comprend au moins deux couronnes individuelles (20,21,22,...) comprenant à leur périphérie latérale des demi-profils (110,110'; 111,111';...) qui, lors de la juxtaposition des couronnes individuelles, réalisent une gorge complète (10,10') dans laquelle sont engagés les pieds (80,81,82,...; 80',81',82',...) de la série d'aubes mobiles (70,71,72,...; 70',71',72',...).Rotor or rotor element according to Claim 1, characterized in that the said rotor or rotor element comprises at least two individual rings (20, 21, 22, ...) comprising half-profiles (110, 110 ', 111, 111') at their lateral periphery. ...) which, when juxtaposing the individual crowns, realize a complete groove (10,10 ') in which the feet are engaged (80,81,82, ...; 80', 81 ', 82' , ...) of the series of blades (70,71,72, ...; 70 ', 71', 72 ', ...). Rotor ou élément rotorique selon la revendication 1 ou 2, caractérisé en ce que les deux couronnes consécutives (20,21,22) sont fixées l'une à l'autre de manière amovible ou inamovible.Rotor or rotor element according to claim 1 or 2, characterized in that the two consecutive rings (20,21,22) are fixed to one another removably or irremovable. Rotor ou élément rotorique selon la revendication 3, caractérisé en ce que les deux couronnes consécutives (20,21,22) sont fixées l'une à l'autre par un assemblage de boulons et d'écrous (13,13') traversant des brides (115,115';116,116') solidaires des couronnes (20,21,22).Rotor or rotor element according to Claim 3, characterized in that the two consecutive rings (20, 21, 22) are fastened to one another by an assembly of bolts and nuts (13, 13 ') passing through flanges (115,115 ', 116,116') integral with the crowns (20,21,22). Rotor ou élément rotorique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la gorge (10,10'), lorsqu'elle est reconstituée, présente une forme en queue d'aronde, circulaire, polygonale ou plane, dans laquelle les pieds (80,81,82,...; 80',81',82',...) de forme complémentaire de la série d'aubes mobiles (70,71,72,...; 70',71',72',...) sont emboítés ou engagés.Rotor or rotor element according to any one of Claims 1 to 4, characterized in that the groove (10, 10 '), when it is reconstituted, has a dovetail, circular, polygonal or planar shape, in which the feet (80,81,82, ...; 80 ', 81', 82 ', ...) of complementary shape of the series of blades (70,71,72, ...; 70' , 71 ', 72', ...) are nested or engaged. Turbocompresseur comprenant un rotor et un stator, caractérisé en ce que le rotor est conforme à l'une quelconque des revendications 1 à 5.Turbocharger comprising a rotor and a stator, characterized in that the rotor is according to any one of claims 1 to 5. Turbocompresseur selon la revendication 6, caractérisé en ce qu'il est une turbosoufflante.Turbocharger according to Claim 6, characterized in that it is a turbofan engine. Turbocompresseur selon la revendication 7, caractérisé en ce qu'il est un turboréacteur.Turbocharger according to Claim 7, characterized in that it is a turbojet engine. Aube destinée à un rotor selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle ne présente pas de plaque ou platine s'étendant essentiellement perpendiculairement à ladite aube.A blade for a rotor according to any of the preceding claims, characterized in that it does not have a plate or plate extending substantially perpendicular to said blade. Assemblage d'au moins deux couronnes individuelles (20,21,22,...) pour constituer à la fois un rotor selon l'une des revendications précédentes et le veine intérieure du flux primaire d'un compresseur basse-pression, lesdites couronnes individuelles comprenant à leur périphérie latérale des demi-profils (110,110'; 111,111') qui, lors de la juxtaposition desdites couronnes individuelles réalisent une gorge complète (10,10') apte à recevoir les pieds (80,81,82,...; 80',81',82',...) d'une série d'aubes mobiles (70,71,72,...;70',71',72',...) d'un étage rotorique, lesdites aubes ne présentant pas de plaque ou platine s'étendant essentiellement perpendiculairement auxdites aubes.Assembly of at least two crowns individuals (20,21,22, ...) to constitute both a rotor according to one of the preceding claims and internal vein of the primary flow of a low-pressure compressor, said individual crowns comprising their lateral periphery of the half-profiles (110, 110 '; 111,111 ') which, when juxtaposing said crowns individuals perform a complete throat (10,10 ') suitable for receive the feet (80,81,82, ...; 80 ', 81', 82 ', ...) of a series of blades (70,71,72, ...; 70 ', 71', 72 ', ...) of a rotor stage, said blades not having a plate or platinum extending substantially perpendicularly said vanes.
EP01870278A 2001-12-17 2001-12-17 Rotor or rotor element for turbocompressors Withdrawn EP1319805A1 (en)

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EP01870278A EP1319805A1 (en) 2001-12-17 2001-12-17 Rotor or rotor element for turbocompressors
US10/323,863 US20030143078A1 (en) 2001-12-17 2002-12-17 Rotor or rotor element for a turbocompressor

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EP01870278A EP1319805A1 (en) 2001-12-17 2001-12-17 Rotor or rotor element for turbocompressors

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