EP1205637A1 - Cooling device for stator ring - Google Patents

Cooling device for stator ring Download PDF

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Publication number
EP1205637A1
EP1205637A1 EP01402865A EP01402865A EP1205637A1 EP 1205637 A1 EP1205637 A1 EP 1205637A1 EP 01402865 A EP01402865 A EP 01402865A EP 01402865 A EP01402865 A EP 01402865A EP 1205637 A1 EP1205637 A1 EP 1205637A1
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EP
European Patent Office
Prior art keywords
stator ring
ramps
ring
ventilation assembly
shells
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
EP01402865A
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German (de)
French (fr)
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EP1205637B1 (en
Inventor
Jean-Baptiste Arilla
Thierry Fachat
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 Aircraft Engines SAS
Original Assignee
SNECMA Moteurs SA
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Publication date
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Publication of EP1205637A1 publication Critical patent/EP1205637A1/en
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Publication of EP1205637B1 publication Critical patent/EP1205637B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08Cooling; Heating; Heat-insulation
    • F01D25/12Cooling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/08Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
    • F01D11/14Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing
    • F01D11/20Actively adjusting tip-clearance
    • F01D11/24Actively adjusting tip-clearance by selectively cooling-heating stator or rotor components
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00Manufacture
    • F05B2230/60Assembly methods
    • F05B2230/604Assembly methods using positioning or alignment devices for aligning or centering, e.g. pins
    • F05B2230/606Assembly methods using positioning or alignment devices for aligning or centering, e.g. pins using maintaining alignment while permitting differential dilatation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00Manufacture
    • F05D2230/60Assembly methods
    • F05D2230/64Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F05D2230/642Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation

Definitions

  • This talk deals with a set of ventilation of a stator ring, intended to convey a gas at a determined temperature up to a ring turbomachine stator to adjust its diameter and the game he will do with blade tips of rotor rotating in it.
  • Such ventilation assemblies are commonly used in turbojets and consist of multi-branched conduits taken up and the ends of which are provided with holes to blow gas and especially air to a large number of points, judiciously distributed, of the ring.
  • Terminal conduits are very often ramps running around the rings, in the shape of an arc of a circle and embracing part of their perimeter. Often too, the gas is blown in the axial direction, on outer ribs of the ring rather than on the ring itself, so that the diameter is controlled by these ribs which are more rigid and govern therefore the deformations of the ring proper.
  • the assembly which will be described here is characterized in that it is easy to manufacture, despite the large number of conduits that are generally required use, and assemble to the ring despite the complications which can arise from dilations differential thermal at different times of machine operation.
  • the invention thus relates to a ventilation assembly of a ring stator composed of branched conduits comprising supply lines, distributors and ramps adjacent to the ring and provided with holes blowing of gases directed towards the ring, characterized in what the ramps are made up of pairs of half shells including a flange and a border surrounding the flange, the pairs of half-shells being joined by the edges, the distributors include spool coils between the ramps and fitted with end edges shaped to fit on side cheek openings of the flanges.
  • a stator ring 1 is associated with a group of ventilation units 2 conforming to the invention, each of which occupies a portion of the circumference of ring 1 and includes a group of ramps 3 parallel and in an arc, distributor 4 for distributing air from ventilation between all ramps 3 and a duct supply 5 (visible in Figure 2) connected to the distributor 4.
  • supply lines 5 join after one or more others distributors, which are not shown because they are not the subject of this invention; this one relates more specifically to the end of the assemblies ventilation 2, i.e. their parts which are close to ring 1 to be ventilated.
  • each of the ramps 3 is composed of a half-shell left 7 and a right half shell 8 of which each of these is assembled to one of these. More precisely, the half-shells 7 and 8 of the two genera each include a flange 9 substantially flat and a border 10 established around the flange 9, the borders 10 of pairs of half-shells 7 and 8 additional being extended and joined to form a single ramp.
  • Half-shells 7 and 8 can be made by simple operation stamping and the connections between the borders 10 can be performed by welding. This mode of manufacturing is extremely simple and avoids having to machine tubes to bring them to shapes and desired dimensions, which would probably be a lot more tedious.
  • half-shells of left 7 can generally be built at from the same tool as the right half-shells 8 which are symmetrical to the previous ones by the plane of seal.
  • This overall similarity does not exclude some dissimilarities of details.
  • half-shells 7 and 8 could be constructed with borders 10 of different widths, so for example favor ventilation by the 3 most wide.
  • An example of application of this process appears in Figure 2, where three ramps 3 ventilate two ribs 11, the central ramp being placed between the two ribs 11 and ventilating them both, which justifies that its width is double.
  • the distributor 4 also includes coils 15 in the form of a short cylinder serving spacers between the ramps 3 and with the conduit 5. It is often beneficial that they are similar, but they can also be different in particular in length. They understand generally edges 16 to be engaged in the openings 13 ramps 3 to hold them in place, and flanges 17 pressing on the ramps 3 to define the spacing of these. Distributor 4 is formed when the coils 15 have been soldered to ramps 3. However, the distribution duct 5 remains generally separate from dispenser 4 and can slide in the input coil 15, a seal sealing 18 being added between them, however.
  • one of the coils 15 comprises planar faces and opposite 19 enclosing the end 20 (here enlarged) of the rib 11 which the corresponding coil 15 overcomes.
  • the reduction in the axial clearance between the coil 15 and the enlarged portion of the rib 11 contributes to ensuring the axial positioning of the distributors 4 on the ring 1.
  • the second coil overlaps its ring with axial play, this to allow the relative dilations between the housings 4 and casing 1 without generating a connection hyperstatic and unwanted constraints.
  • FIG. 3 shows that the end 20 of this rib 11 has a v-notch 21 in which the central, cylindrical portion of the coil 15 rests in self-centering, which guarantees the distributor 4 against radial movements and tangents to ring 1: perfect positioning radial, tangential and in orientation along the axis of the engine is performed.
  • Brackets 22 are linked to one end of the stator ring 1 by fixing bolts 23 and include a wing 24 under one end of the ruler 6; the other end of it is placed on a boss 25 of the stator ring 1.
  • Bolts 26 and 27 are screwed to wing 24 and boss 25. They maintain the ends of rule 6 on them by compressing springs 28 based on rule 6 by washers 29.
  • Such an assembly has the property of allow better control of the support effort of rules 6 on equettes 24 and 25. If this effect is excessive, the assembly is rigid and does not allow thermal respiration.
  • rule 6 to which ramps 3 are welded, is provided with 30 wide openings around bolts 26 and 27, so that it can be move by sliding axially and tangentially by compared to the stator ring. This flexible mounting avoids therefore to produce excessive internal stresses in ventilation assembly 2, since the ramps 3 have the ability to move above the ring 1 without exerting too much effort. These relative displacements are generally due to thermal expansions differential.
  • the support of one of the coils 15 against the end 20 of the corresponding rib 11 offers also some flexibility by allowing all of ventilation 2 to move to the ends, while being recalled towards the stator ring 1 and the bottom of the vé 21 by springs 28. This flexibility is valuable by absorbing expansions inevitable differential thermal with such equipment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The assembly includes branched pipes set around the stator ring (1) and formed by feed pipes (5), distributors (4) and manifolds (3). The manifolds are made from half-shells (7,8) each having an end plate (9) with a rim (10). The half-shells are coupled together through its rims and drilled with air holes. The distributors include coils set between the manifolds. The coils have ends arranged to openings at sides of the end plates. Holes are drilled through the manifolds, to lead air into the branched pipes.

Description

Cet exposé traite d'un ensemble de ventilation d'un anneau de stator, destiné à acheminer un gaz à une température déterminée jusqu'à un anneau de stator de turbomachine afin de régler son diamètre et le jeu qu'il fera avec des extrémités d'aubes de rotor tournant en lui.This talk deals with a set of ventilation of a stator ring, intended to convey a gas at a determined temperature up to a ring turbomachine stator to adjust its diameter and the game he will do with blade tips of rotor rotating in it.

De tels ensembles de ventilation sont couramment utilisés dans les turboréacteurs et consistent en des conduits se ramifiant à plusieurs reprises et dont les extrémités sont munies de perçages pour souffler du gaz et notamment de l'air à un grand nombre de points, répartis judicieusement, de l'anneau. Les conduits terminaux sont très souvent des rampes courant autour des anneaux, en forme d'arc de cercle et embrassant une partie de leur périmètre. Souvent aussi, le gaz est soufflé en direction axiale, sur des nervures extérieures de l'anneau plutôt que sur l'anneau lui-même, afin que le diamètre soit contrôlé par ces nervures qui sont plus rigides et régissent donc les déformations de l'anneau proprement dit.Such ventilation assemblies are commonly used in turbojets and consist of multi-branched conduits taken up and the ends of which are provided with holes to blow gas and especially air to a large number of points, judiciously distributed, of the ring. Terminal conduits are very often ramps running around the rings, in the shape of an arc of a circle and embracing part of their perimeter. Often too, the gas is blown in the axial direction, on outer ribs of the ring rather than on the ring itself, so that the diameter is controlled by these ribs which are more rigid and govern therefore the deformations of the ring proper.

L'ensemble qui sera décrit ici se caractérise en ce qu'il est facile à fabriquer, malgré le grand nombre de conduits qu'il faut généralement employer, et à assembler à l'anneau malgré les complications qui peuvent naítre de dilatations thermiques différentielles à différents moments de fonctionnement de la machine. The assembly which will be described here is characterized in that it is easy to manufacture, despite the large number of conduits that are generally required use, and assemble to the ring despite the complications which can arise from dilations differential thermal at different times of machine operation.

Sous sa forme la plus générale, l'invention concerne ainsi un ensemble de ventilation d'un anneau de stator composé de conduits ramifiés comprenant des conduits d'alimentation, des distributeurs et des rampes adjacentes à l'anneau et munies de perçages de soufflage de gaz dirigés vers l'anneau, caractérisé en ce que les rampes sont composées de paires de demi-coquilles comprenant un flasque et une bordure entourant le flasque, les paires de demi-coquilles étant jointes par les bordures, les distributeurs comprennent des bobines en entretoises entre les rampes et munies de bords d'extrémité façonnés pour s'ajuster sur des ouvertures de joues latérales des flasques.In its most general form, the invention thus relates to a ventilation assembly of a ring stator composed of branched conduits comprising supply lines, distributors and ramps adjacent to the ring and provided with holes blowing of gases directed towards the ring, characterized in what the ramps are made up of pairs of half shells including a flange and a border surrounding the flange, the pairs of half-shells being joined by the edges, the distributors include spool coils between the ramps and fitted with end edges shaped to fit on side cheek openings of the flanges.

D'autres aspects caractéristiques et avantages de l'invention apparaítront plus nettement à la description des figures suivantes :

  • la figure 1 est une vue générale de l'ensemble,
  • la figure 2 est une vue d'un distributeur à la ramification d'un conduit,
  • la figure 3 expose un mode de support de l'ensemble sur l'anneau,
  • et la figure 4 représente un groupe de rampes en coupe près de leur extrémité, ainsi qu'un moyen de maintien sur l'anneau.
Other characteristic aspects and advantages of the invention will appear more clearly on description of the following figures:
  • FIG. 1 is a general view of the assembly,
  • FIG. 2 is a view of a distributor at the branching of a conduit,
  • FIG. 3 shows a method of supporting the assembly on the ring,
  • and FIG. 4 represents a group of ramps in section near their end, as well as a means of holding on the ring.

Un anneau de stator 1 est associé à un groupe d'ensembles 2 de ventilation conformes à l'invention, dont chacun occupe une portion de la circonférence de l'anneau 1 et comprend un groupe de rampes 3 parallèles et en arc de cercle, un distributeur 4 permettant de répartir de l'air de ventilation entre toutes les rampes 3 et un conduit d'alimentation 5 (visible à la figure 2) abouché au distributeur 4. En général, les conduits d'alimentation 5 se rejoignent après un ou plusieurs autres distributeurs, qui ne sont cependant pas montrés car ils ne font pas l'objet de cette invention ; celle-ci concerne plus spécifiquement l'extrémité des ensembles de ventilation 2, c'est-à-dire leurs parties qui sont proches de l'anneau 1 à ventiler. On remarquera encore des moyens de maintien des rampes 3 sur l'anneau 1, comprenant des règles 6 dont les extrémités sont assujetties à l'anneau 1 et qui couvrent chacun une des extrémités d'un des groupes de rampes 3 en les croisant.A stator ring 1 is associated with a group of ventilation units 2 conforming to the invention, each of which occupies a portion of the circumference of ring 1 and includes a group of ramps 3 parallel and in an arc, distributor 4 for distributing air from ventilation between all ramps 3 and a duct supply 5 (visible in Figure 2) connected to the distributor 4. In general, supply lines 5 join after one or more others distributors, which are not shown because they are not the subject of this invention; this one relates more specifically to the end of the assemblies ventilation 2, i.e. their parts which are close to ring 1 to be ventilated. We will notice again means for holding the ramps 3 on the ring 1, including rules 6 whose ends are subject to ring 1 and which each cover one of the ends of one of the groups of 3 ramps crossing.

Comme on le voit aussi à la figure 2, chacune des rampes 3 est composée d'une demi-coquille de gauche 7 et d'une demi-coquille de droite 8 dont chacune de celles-ci est assemblée à une de celles-là. Plus précisément, les demi-coquilles 7 et 8 des deux genres comprennent chacune un flasque 9 sensiblement plat et une bordure 10 établie autour du flasque 9, les bordures 10 de paires de demi-coquilles 7 et 8 complémentaires étant mises en prolongement et jointes pour former une rampe unique. Les demi-coquilles 7 et 8 peuvent être fabriquées par une simple opération d'estampage et les liaisons entre les bordures 10 peuvent être exécutées par soudage. Ce mode de fabrication est extrêmement simple et évite d'avoir à usiner des tubes pour les amener aux formes et aux dimensions voulues, ce qui serait probablement beaucoup plus fastidieux. De plus, toutes les demi-coquilles de gauche 7 pourront généralement être construites à partir du même outil que les demi-coquilles de droite 8 qui sont symétriques aux précédentes par le plan de joint. Cette similitude d'ensemble n'exclurait pas certaines dissemblances de détails. Par exemple, les demi-coquilles 7 et 8 pourraient être construites avec des bordures 10 de largeur différente, afin par exemple de privilégier la ventilation par les rampes 3 les plus larges. Un exemple d'application de ce procédé apparaít à la figure 2, où trois rampes 3 ventilent deux nervures 11, la rampe centrale étant placée entre les deux nervures 11 et les ventilant toutes deux, ce qui justifie que sa largeur soit double. Les orifices de soufflage 12 par lesquels l'air s'échappe des rampes 3 sont exécutés à volonté avant ou après l'estampage des demi-coquilles 7 et 8, en n'omettant par exemple que les demi-coquilles d'extrémité, qui ne sont situées devant aucune des nervures 11.As we also see in Figure 2, each of the ramps 3 is composed of a half-shell left 7 and a right half shell 8 of which each of these is assembled to one of these. More precisely, the half-shells 7 and 8 of the two genera each include a flange 9 substantially flat and a border 10 established around the flange 9, the borders 10 of pairs of half-shells 7 and 8 additional being extended and joined to form a single ramp. Half-shells 7 and 8 can be made by simple operation stamping and the connections between the borders 10 can be performed by welding. This mode of manufacturing is extremely simple and avoids having to machine tubes to bring them to shapes and desired dimensions, which would probably be a lot more tedious. In addition, all the half-shells of left 7 can generally be built at from the same tool as the right half-shells 8 which are symmetrical to the previous ones by the plane of seal. This overall similarity does not exclude some dissimilarities of details. For example, half-shells 7 and 8 could be constructed with borders 10 of different widths, so for example favor ventilation by the 3 most wide. An example of application of this process appears in Figure 2, where three ramps 3 ventilate two ribs 11, the central ramp being placed between the two ribs 11 and ventilating them both, which justifies that its width is double. The orifices of supply air 12 by which air escapes from the ramps 3 are executed at will before or after the stamping of half-shells 7 and 8, for example omitting only the end half-shells, which are only located in front of none of the ribs 11.

D'autres ouvertures, plus larges, portent la référence 13 et sont exécutées à travers des joues 14 des flasques 9, hormis à une demi-coquilles extrême 10, pour former le distributeur 4. Les joues 14 s'étendent latéralement à partir des centres des flasques 9 dans ce mode de réalisation et leur sont coplanaires. Les extrémités des rampes 3 sont closes par des tôles continues qui leur sont soudées.Other, larger openings carry the reference 13 and are executed through cheeks 14 of the flanges 9, except for an extreme half-shell 10, to form the distributor 4. The cheeks 14 extend laterally from the centers of flanges 9 in this embodiment and their coplanar. The ends of the ramps 3 are closed by continuous sheets which are welded to them.

Le distributeur 4 comprend encore des bobines 15 en forme de cylindre court servant d'entretoises entre les rampes 3 et avec le conduit d'alimentation 5. Il est souvent avantageux qu'elles soient semblables, mais elles peuvent aussi être différentes notamment en longueur. Elles comprennent généralement des bords 16 à engager dans les ouvertures 13 des rampes 3 pour les maintenir en place, et des collerettes 17 en appui sur les rampes 3 pour définir l'écartement de celles-ci. Le distributeur 4 est constitué quand les bobines 15 ont été soudées aux rampes 3. Toutefois, le conduit de distribution 5 reste généralement distinct du distributeur 4 et peut coulisser dans la bobine 15 d'entrée, un joint d'étanchéité 18 étant cependant ajouté entre eux.The distributor 4 also includes coils 15 in the form of a short cylinder serving spacers between the ramps 3 and with the conduit 5. It is often beneficial that they are similar, but they can also be different in particular in length. They understand generally edges 16 to be engaged in the openings 13 ramps 3 to hold them in place, and flanges 17 pressing on the ramps 3 to define the spacing of these. Distributor 4 is formed when the coils 15 have been soldered to ramps 3. However, the distribution duct 5 remains generally separate from dispenser 4 and can slide in the input coil 15, a seal sealing 18 being added between them, however.

Pour conclure avec la figure 2, on notera qu'une des bobines 15 comprend des faces planes et opposées 19 enserrant l'extrémité 20 (ici élargie) de la nervure 11 que la bobine 15 correspondante surmonte. La réduction du jeu axial entre la bobine 15 et la portion élargie de la nervure 11 contribue à assurer le positionnement axial des distributeurs 4 sur l'anneau 1. Ceci permet d'assurer le positionnement axial du distributeur 4, de régler au plus précis les entrefers entre les rampes 3 et les anneaux de contrôle 11 et de maítriser au mieux les échanges convectifs créés par le douchage en air des anneaux 11. On notera que la seconde bobine chevauche son anneau avec un jeu axial, ceci pour permettre les dilations relatives entre les boítiers 4 et le carter 1 sans générer de liaison hyperstatique et de contraintes indésirées.To conclude with Figure 2, we will note that one of the coils 15 comprises planar faces and opposite 19 enclosing the end 20 (here enlarged) of the rib 11 which the corresponding coil 15 overcomes. The reduction in the axial clearance between the coil 15 and the enlarged portion of the rib 11 contributes to ensuring the axial positioning of the distributors 4 on the ring 1. This ensures the axial positioning of the distributor 4, to adjust the air gaps as precisely as possible between the ramps 3 and the control rings 11 and master the convective exchanges created by the air showering of the rings 11. It will be noted that the second coil overlaps its ring with axial play, this to allow the relative dilations between the housings 4 and casing 1 without generating a connection hyperstatic and unwanted constraints.

La constitution de l'ensemble de ventilation en éléments standardisés et soudés entre eux est particulièrement simple et avantageuse. On va maintenant, dans la suite de cet exposé, décrire la façon dont l'ensemble de ventilation 2 est assujetti à l'anneau 1. La figure 3 montre encore que l'extrémité 20 de cette nervure 11 possède une entaille en vé 21 dans laquelle la portion centrale, cylindrique, de la bobine 15 repose en s'auto-centrant, ce qui garantit le distributeur 4 contre les mouvements radiaux et tangents à l'anneau 1 : une mise en position parfaite radiale, tangentielle et en orientation selon l'axe du moteur est réalisée.The constitution of the whole of ventilation in standardized and welded elements between them is particularly simple and advantageous. We go now, in the rest of this talk, describe the how the ventilation assembly 2 is subject to ring 1. Figure 3 also shows that the end 20 of this rib 11 has a v-notch 21 in which the central, cylindrical portion of the coil 15 rests in self-centering, which guarantees the distributor 4 against radial movements and tangents to ring 1: perfect positioning radial, tangential and in orientation along the axis of the engine is performed.

Les moyens aux règles 6 vont maintenant être décrits complètement, en liaison à la figure 4 pour montrer comment ils parachèvent le maintien des rampes 3. Des équerres 22 sont liées à une extrémité de l'anneau de stator 1 par des boulons de fixation 23 et comprennent une aile 24 sous une extrémité de la règle 6 ; l'autre extrémité de celle-ci est posée sur un bossage 25 de l'anneau de stator 1. Des boulons 26 et 27 sont vissés à l'aile 24 et au bossage 25. Ils maintiennent les extrémités de la règle 6 sur ceux-ci en comprimant des ressorts 28 s'appuyant sur la règle 6 par des rondelles 29. Un tel montage a la propriété de permettre de mieux maítriser l'effort d'appui des règles 6 sur les équettes 24 et 25. Si cet effet est excessif, l'assemblage est rigide et ne permet pas la respiration thermique. La meilleure maítrise vient du fait qu'il est plus facile de calibrer un effort de compression d'un ressort 28 par la hauteur sous collerette de la coupelle 31, que de régler un effort de traction dans un boulon 26 en le serrant au couple. De plus, la règle 6, à laquelle les rampes 3 sont soudées, est ménagée avec des ouvertures 30 larges autour des boulons 26 et 27, de manière à pouvoir se déplacer en glissant axialement et tangentiellement par rapport à l'anneau de stator. Ce montage souple évite donc de produire des contraintes internes excessives dans l'ensemble de ventilation 2, puisque les rampes 3 ont la faculté de se déplacer au-dessus de l'anneau 1 sans exercer trop d'efforts. Ces déplacements relatifs sont dus généralement à des dilatations thermiques différentielles. L'appui d'une des bobines 15 contre l'extrémité 20 de la nervure 11 correspondante offre aussi quelque souplesse en autorisant l'ensemble de ventilation 2 à se déplacer aux extrémités, tout en étant rappelé vers l'anneau 1 de stator et le fond du vé 21 par les ressorts 28. Cette souplesse est précieuse en permettant d'absorber les dilatations thermiques différentielles inévitables avec un tel appareillage.The means to rules 6 now go be described completely, in conjunction with Figure 4 to show how they complete the maintenance of ramps 3. Brackets 22 are linked to one end of the stator ring 1 by fixing bolts 23 and include a wing 24 under one end of the ruler 6; the other end of it is placed on a boss 25 of the stator ring 1. Bolts 26 and 27 are screwed to wing 24 and boss 25. They maintain the ends of rule 6 on them by compressing springs 28 based on rule 6 by washers 29. Such an assembly has the property of allow better control of the support effort of rules 6 on equettes 24 and 25. If this effect is excessive, the assembly is rigid and does not allow thermal respiration. The best control comes from makes it easier to calibrate an effort of compression of a spring 28 by the height under flange of the cup 31, than adjusting a force tension in a bolt 26 by tightening it to the torque. In addition, rule 6, to which ramps 3 are welded, is provided with 30 wide openings around bolts 26 and 27, so that it can be move by sliding axially and tangentially by compared to the stator ring. This flexible mounting avoids therefore to produce excessive internal stresses in ventilation assembly 2, since the ramps 3 have the ability to move above the ring 1 without exerting too much effort. These relative displacements are generally due to thermal expansions differential. The support of one of the coils 15 against the end 20 of the corresponding rib 11 offers also some flexibility by allowing all of ventilation 2 to move to the ends, while being recalled towards the stator ring 1 and the bottom of the 21 by springs 28. This flexibility is valuable by absorbing expansions inevitable differential thermal with such equipment.

Claims (7)

Ensemble de ventilation (2) d'un anneau (1) de stator, composé de conduits ramifiés comprenant des conduits d'alimentation (5), des distributeurs (4) et des rampes (3) adjacents à l'anneau et munies de perçages (12) de soufflage de gaz dirigés vers l'anneau, caractérisé en ce que les rampes sont composées de paires de demi-coquilles (7, 8) comprenant un flasque (9) et une bordure (10) entourant le flasque, les paires de demi-coquilles étant jointes par les bordures, les distributeurs comprennent des bobines (15) en entretoises entre les rampes et munies de bords d'extrémité (16) façonnés pour s'ajuster sur des ouvertures (13) de joues (14) latérales des flasques.Ventilation assembly (2) of a stator ring (1), composed of branched conduits comprising supply conduits (5), distributors (4) and ramps (3) adjacent to the ring and provided with holes (12) for blowing gases directed towards the ring, characterized in that the ramps are composed of pairs of half-shells (7, 8) comprising a flange (9) and an edge (10) surrounding the flange, the pairs of half-shells being joined by the edges, the distributors comprise coils (15) in spacers between the ramps and provided with end edges (16) shaped to fit on openings (13) of side cheeks (14) flasks. Ensemble de ventilation d'un anneau de stator selon la revendication 1, caractérisé en ce que les demi-coquilles ont des flasques identiques, mais des bordures pouvant avoir des largeurs différentes.Ventilation assembly for a stator ring according to claim 1, characterized in that the half-shells have identical flanges, but edges which may have different widths. Ensemble de ventilation d'un anneau de stator selon l'une quelconque des revendications 1 ou 2, caractérisé en ce qu'il comprend des entailles en vé (21) dans des nervures (11) où viennent s'appuyer en s'auto-centrant les bobines (15), assurant ainsi une mise en position parfaite des distributeurs sur l'anneau (1) radialement, tangentiellement et en orientation selon un axe de moteur.Ventilation assembly of a stator ring according to any one of claims 1 or 2, characterized in that it comprises v-notches (21) in ribs (11) where they come to rest in self- centering the coils (15), thus ensuring perfect positioning of the distributors on the ring (1) radially, tangentially and in orientation along a motor axis. Ensemble de ventilation d'un anneau de stator selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comprend, sur une des bobines, des surfaces (19) planes, parallèles aux rampes, d'appui sur une nervure (11) de l'anneau (1) de stator et la nervure (11) s'élargit localement pour réduire le jeu axial avec ladite bobine pour assurer le positionnement axial des distributeurs (4) sur l'anneau (1).Ventilation assembly for a stator ring according to any one of claims 1 to 3, characterized in that it comprises, on one of the coils, planar surfaces (19), parallel to the ramps, bearing on a rib (11) of the stator ring (1) and the rib (11) widens locally to reduce the axial play with said coil to ensure the axial positioning of the distributors (4) on the ring (1). Ensemble de ventilation d'un anneau de stator selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comprend des règles (6) de maintien des rampes vers l'anneau de stator, couvrant les rampes (3) en les croisant et assujetties à l'anneau de stator.Ventilation assembly for a stator ring according to any one of Claims 1 to 4, characterized in that it comprises rules (6) for holding the ramps towards the stator ring, covering the ramps (3) in crossing them and subject to the stator ring. Ensemble de ventilation d'un anneau de stator selon la revendication 5, caractérisé en ce que les règles de maintien sont assujetties à l'anneau de stator par des liaisons élastiques en direction de l'anneau de stator.Ventilation assembly for a stator ring according to claim 5, characterized in that the holding rules are subject to the stator ring by elastic connections in the direction of the stator ring. Ensemble de ventilation d'un anneau de stator selon l'une quelconque des revendications 5 ou 6, caractérisé en ce que les règles de maintien sont assujetties à l'anneau du stator par des liaisons (26, 27) permettant un déplacement de glissement des règles aux extrémités.Ventilation assembly of a stator ring according to any one of claims 5 or 6, characterized in that the holding rules are subject to the stator ring by connections (26, 27) allowing a sliding movement of the rules at the ends.
EP01402865A 2000-11-09 2001-11-08 Ventilating device for stator ring Expired - Lifetime EP1205637B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0014373A FR2816352B1 (en) 2000-11-09 2000-11-09 VENTILATION ASSEMBLY OF A STATOR RING
FR0014373 2000-11-09

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EP1205637A1 true EP1205637A1 (en) 2002-05-15
EP1205637B1 EP1205637B1 (en) 2003-07-09

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Country Status (9)

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US (1) US6896038B2 (en)
EP (1) EP1205637B1 (en)
JP (1) JP3913032B2 (en)
CA (1) CA2361103C (en)
DE (1) DE60100448T2 (en)
ES (1) ES2199921T3 (en)
FR (1) FR2816352B1 (en)
RU (1) RU2276733C2 (en)
UA (1) UA73938C2 (en)

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CN107923259A (en) * 2015-08-27 2018-04-17 赛峰飞机发动机公司 The device of the manifold of the shell for the turbine for passing through air jet cooling turbine engines for attachment
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FR2867805A1 (en) * 2004-03-18 2005-09-23 Snecma Moteurs TURBOMACHINE HIGH-PRESSURE TURBINE STATOR AND METHOD OF ASSEMBLY
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EP1577501A1 (en) * 2004-03-18 2005-09-21 Snecma High pressure turbine stator of a turbo-engine and his assembling process
US8668438B2 (en) 2009-04-16 2014-03-11 Rolls-Royce Plc Turbine casing cooling
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FR2999642A1 (en) * 2012-12-17 2014-06-20 Snecma Stator assembly for turbine of turboshaft engine of aircraft, has adjustment unit for adjusting position of ring sectors, where bump includes raised portion located at pipe opening to improve heat exchange between injected air and bump wall
FR3040428A1 (en) * 2015-08-27 2017-03-03 Snecma DEVICE FOR COOLING AIR JETS OF THE CARTER OF A TURBINE OF A TURBOMACHINE
CN107923259A (en) * 2015-08-27 2018-04-17 赛峰飞机发动机公司 The device of the manifold of the shell for the turbine for passing through air jet cooling turbine engines for attachment
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CN106382136A (en) * 2016-11-18 2017-02-08 中国科学院工程热物理研究所 Transonic speed movable blade top gap active control device
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FR3099798A1 (en) * 2019-08-09 2021-02-12 Safran Aircraft Engines Set for a turbomachine turbine
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WO2021028634A1 (en) * 2019-08-09 2021-02-18 Safran Aircraft Engines Assembly intended for holding a manifold housing of a device for cooling a turbomachine turbine casing
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US11879347B2 (en) 2020-04-17 2024-01-23 Safran Aircraft Engines Turbine housing cooling device

Also Published As

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DE60100448T2 (en) 2004-04-15
JP2002195007A (en) 2002-07-10
JP3913032B2 (en) 2007-05-09
RU2276733C2 (en) 2006-05-20
UA73938C2 (en) 2005-10-17
FR2816352B1 (en) 2003-01-31
US6896038B2 (en) 2005-05-24
US20020053837A1 (en) 2002-05-09
CA2361103A1 (en) 2002-05-09
ES2199921T3 (en) 2004-03-01
FR2816352A1 (en) 2002-05-10
CA2361103C (en) 2009-12-29
EP1205637B1 (en) 2003-07-09
DE60100448D1 (en) 2003-08-14

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