EP2009245B1 - Fan rotor - Google Patents

Fan rotor Download PDF

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Publication number
EP2009245B1
EP2009245B1 EP08159121.6A EP08159121A EP2009245B1 EP 2009245 B1 EP2009245 B1 EP 2009245B1 EP 08159121 A EP08159121 A EP 08159121A EP 2009245 B1 EP2009245 B1 EP 2009245B1
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EP
European Patent Office
Prior art keywords
blade root
rotor according
spacer
rotor
slot
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EP08159121.6A
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German (de)
French (fr)
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EP2009245B2 (en
EP2009245A1 (en
Inventor
Olivier Belmonte
Jean-Luc Christina Yvon Goga
Jean-Noël Mahieu
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Safran Aircraft Engines SAS
Original Assignee
SNECMA SAS
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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
    • F01D5/3023—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
    • F01D5/3092—Protective layers between blade root and rotor disc surfaces, e.g. anti-friction layers
    • 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
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations

Definitions

  • the invention generally relates to a turbomachine rotor more particularly a fan rotor comprising a disc provided with cells at its periphery and blades respectively attached to said rotor, each blade having a blade root engaged in a corresponding cell.
  • the invention relates to an improvement to an elongate wedge which is interposed between the blade root and the bottom of the cell.
  • the invention is particularly applicable to the assembly of blades made of 3D woven composite material, which are increasingly used in blowers. It relates to a wedge well adapted to this type of blade (although not exclusively), the wedge may itself be made of the same material or a similar material.
  • One of the aims of the invention is to improve the behavior of the vanes of a rotor, particularly a fan rotor, in the event of a serious incident resulting for example from the ingestion of a bird.
  • French Patent No. 2,841,609 illustrates a wedge having metal parts and semi-rigid elastomer parts.
  • the shape of this wedge allows to take into account the movements of the foot of the dawn during a critical event mentioned above. In such circumstances, the fan blade pivots under the impact, so the blade root rotates in the disk cavity.
  • the dawn in addition to the rotational movement, is plunged forward and backward in response.
  • the front, central and rear parts of the dawn undergo torsional movements and axial dive, of different amplitude for each of them.
  • the invention proposes a new type of wedge whose shape has been defined to reduce the shock during the contact between the blade and the cell, absorb some of the energy generated by the impact and reduce the risk of damage. of dawn.
  • the invention relates first of all to a fan rotor comprising a disk provided with cells at its periphery and blades respectively attached to said rotor, each blade comprising a blade root engaged in a corresponding cell and each cell containing an elongated shim interposed between the blade root and the bottom of the cell, characterized in that said shim is of elastically deformable material, in that at least one longitudinal section of this shim has a transverse profile in the form of arc to define two lateral zones in contact with corresponding lateral zones of the blade root and remote from the bottom of the cell and a central zone facing the corresponding central zone of the cell bottom.
  • the central zone of said section is remote from the corresponding central zone of the blade root. In other words, a slight gap remains between the central zone of the section of the hold and the central area facing the blade root.
  • the wedge consists of several aforementioned sections joined by narrower junctions.
  • the wedge has a wavy profile along its own longitudinal direction.
  • said wedge may longitudinally have a central region in contact with the bottom of the cell and two end regions (on either side of the central region, longitudinally) in contact with the blade root.
  • the section of the hold in normal operation, is adapted to the shape of the surrounding parts (blower disk and fan blade) and the assembly is done with a slight constraint between the blade root and the bottom. of the cell.
  • the dawn foot is plated on its bearing, bearing on the bottom of the cell (in the central part) and below the blade root on the lateral surfaces of it.
  • the wavy profile mentioned above optimizes the contacts between the ends and the center of the wedge on the one hand and between the blade and the disk, on the other hand.
  • the wedge by its flexibility follows the combined movement of torsion-diving when a critical event occurs. It comes to interpose to limit the shock between the dawn foot and the alveolus of the disc.
  • the contact zone between the wedge and the underside of the blade root is curved so as to allow relative sliding of the two parts together, during pivoting of the blade.
  • the wedge is divided into three sections which react separately to the combined movements of the blade root and make it possible to better accompany the movements and deformations specific to each part of the blade root.
  • a polyurethane film-like coating or the like is disposed on and / or under the shim to help dissipate some of the energy of the impact and therefore limit the risk of breakage of the wedge and cracking of the blade root.
  • the wedge is made of a one-piece elastic composite material and preferably of 3D woven composite material.
  • the invention also relates to a wedge intended to be inserted in a blower rotor cell, characterized in that it consists of an elastically deformable material and in that it comprises at least one longitudinal profile section. cross-shaped arc.
  • a shim 11 intended to be inserted into a cavity 13 of a fan rotor disc 15. Such a disk is partially represented on the Figures 2 to 4 .
  • the shim 11 consists of a single block of elastically deformable material and more particularly here a composite woven 3D known per se. It is recalled that the 3-dimensional weave defining the core of the piece is coated with resin.
  • the shim comprises at least one longitudinal section arcuate cross section.
  • Such shim is intended to be inserted into a tangential cavity 13 made at the periphery of the rotor disc 15.
  • it is a fan rotor disk to which blades 20 are attached.
  • Each blade comprises a blade root 21 engaged in a corresponding cell 13.
  • a hold such as that shown in Figures 1 and 2 is housed in each cell 13 being interposed between the blade root 21 and the bottom 13a of the cell 13.
  • the shim 11 is preferably made of 3D woven composite material.
  • the wedge is of elastically deformable material.
  • the or each longitudinal section 17a-17c of this wedge has a transverse profile in the form of an arc to define two lateral zones 25a, 25b in contact with corresponding lateral zones 26a, 26b of the foot of dawn 20 while being away from the bottom of the cell. Furthermore, a central zone 29 of the wedge section is located opposite the corresponding central zone 30 of the cell bottom. This central zone of the wedge section may be in contact with the bottom of the cell, as is visible on the figure 3 .
  • the central zone of said section may be remote from the corresponding central area of the blade root, leaving a slight gap 32 between them.
  • the wedge 11 has a wavy profile in its longitudinal direction.
  • the wedge longitudinally has a central region 11a in contact with the bottom of the cell and two end regions 11b in contact with the blade root but remote from the bottom of the cell.
  • the wedge is shown mounted under stress between the blade root and the bottom of the cell, so that its longitudinal curvature between the center and the ends is less than it is in the unconstrained state, before mounting.
  • a polyurethane film-like coating or the like is disposed on and / or under the shim. This makes it possible to dissipate part of the energy of the shock, in the event of an incident, and consequently to limit the risks of breakage of the wedge or cracking of the blade root.
  • this type of shim is well adapted to maintain a blade of 3D woven composite material in its cell, at rest or in normal operation.
  • Oblong holes 35 are furthermore made in the central zones of at least some sections, to further improve the flexibility and the deformability of the different parts of the hold.
  • the shape of the wedge combined with the classic shape of the blade root optimizes the contacts between the ends and the center of the wedge on the one hand and the contact between the blade root and the walls of the blade. cell on the other hand.
  • the wedge section has two further thinning 36 between the side portions in contact with the blade root and the middle portion facing the bottom of the cell.
  • each junction 18 connecting two adjacent sections 17a-17c is substantially in the extension and continuity of the central zones of these two sections, it joins.
  • said junction has a transverse profile substantially identical to that of the central zone of a aforementioned section.
  • the proposed solution which consists in giving a form adapted to the wedge and preferably in making it in a flexible material identical to the material of the composite blade makes it possible to eliminate the risk of cracking the blade root.
  • the preload assembly allows to properly press the blade root on its bearing, bearing on the bottom of the cavity of the disc.
  • the wavy shape of the wedge in the axial direction, optimizes the contacts between the ends and the center of the wedge on the one hand and between the blade and the disk on the other hand.
  • the wedge by its flexibility, follows the combined movement of torsion / diving of the foot of dawn, during a critical event.
  • the wedge is interposed to limit the impact between the blade root and the disk cavity.
  • the area in contact between the wedge and the underside of the blade root is of curved shape, which allows a relative sliding of the two parts during a large pivot.
  • the three sections of the hold react separately to the movement of the dawn, which allows to better accompany the movement of each part of the foot of the dawn.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Wind Motors (AREA)

Description

L'invention se rapporte généralement à un rotor de turbomachine plus particulièrement un rotor de soufflante comprenant un disque muni d'alvéoles à sa périphérie et des aubes respectivement rattachées audit rotor, chaque aube comportant un pied d'aube engagé dans une alvéole correspondante. L'invention concerne un perfectionnement à une cale allongée qui est intercalée entre le pied d'aube et le fond de l'alvéole. L'invention s'applique particulièrement au montage des aubes en matériau composite tissé 3D, qui sont de plus en plus utilisées dans les soufflantes. Elle concerne une cale bien adaptée à ce type d'aube (bien que non exclusivement), la cale pouvant elle-même être constituée du même matériau ou d'un matériau semblable. L'un des buts de l'invention est d'améliorer le comportement des aubes d'un rotor, particulièrement un rotor de soufflante, dans le cas d'un incident grave résultant par exemple de l'ingestion d'oiseau.The invention generally relates to a turbomachine rotor more particularly a fan rotor comprising a disc provided with cells at its periphery and blades respectively attached to said rotor, each blade having a blade root engaged in a corresponding cell. The invention relates to an improvement to an elongate wedge which is interposed between the blade root and the bottom of the cell. The invention is particularly applicable to the assembly of blades made of 3D woven composite material, which are increasingly used in blowers. It relates to a wedge well adapted to this type of blade (although not exclusively), the wedge may itself be made of the same material or a similar material. One of the aims of the invention is to improve the behavior of the vanes of a rotor, particularly a fan rotor, in the event of a serious incident resulting for example from the ingestion of a bird.

Il est connu du document EP 1 138 879 A un disque rotorique de turbine équipé d'ailettes à pied de sapin et un procédé de montage d'une ailette sur un disque.It is known from the document EP 1 138 879 A a turbine rotor disc equipped with fir-fin blades and a method of mounting a fin on a disc.

Il est connu d'insérer une cale déformable dans chaque alvéole du disque de rotor, entre le fond de cette alvéole et la face intérieure du pied d'aube retenu dans ladite alvéole. Par exemple, le brevet français n° 2 841 609 illustre une cale comportant des parties métalliques et des parties en élastomère semi-rigide. La forme de cette cale permet de tenir compte des mouvements du pied de l'aube lors d'un évènement critique mentionné ci-dessus. Dans de telles circonstances, l'aube de soufflante pivote sous l'impact, le pied d'aube pivotant par conséquent dans l'alvéole du disque. L'aube, en plus du mouvement de rotation subit un mouvement de plongée vers l'avant puis vers l'arrière, en réaction. Les parties avant, centrale et arrière de l'aube subissent des mouvements de torsion et de plongée axiale, d'amplitude différentes pour chacune d'elles.It is known to insert a deformable shim in each cell of the rotor disc, between the bottom of this cell and the inner face of the blade root retained in said cell. For example, French Patent No. 2,841,609 illustrates a wedge having metal parts and semi-rigid elastomer parts. The shape of this wedge allows to take into account the movements of the foot of the dawn during a critical event mentioned above. In such circumstances, the fan blade pivots under the impact, so the blade root rotates in the disk cavity. The dawn, in addition to the rotational movement, is plunged forward and backward in response. The front, central and rear parts of the dawn undergo torsional movements and axial dive, of different amplitude for each of them.

Dans le cas d'une aube en matériau composite comportant une armature tissée en trois dimensions (ci-après désigné "tissé 3D") de tels chocs entraînent des risques de fissuration du pied d'aube pouvant entraîner la rupture de celui-ci et par voie de conséquence la perte complète de l'aube de soufflante.In the case of a composite material blade having a three-dimensional woven reinforcement (hereinafter referred to as "3D woven"), such shocks lead to the risk of cracking of the blade root, which can lead to breakage thereof and to way of consequence the complete loss of the blower dawn.

L'invention propose un nouveau type de cale dont la forme a été définie pour réduire le choc lors du contact entre l'aube et l'alvéole, absorber une partie de l'énergie générée par l'impact et réduire les risques d'endommagement de l'aube.The invention proposes a new type of wedge whose shape has been defined to reduce the shock during the contact between the blade and the cell, absorb some of the energy generated by the impact and reduce the risk of damage. of dawn.

A cet effet, l'invention concerne en premier lieu un rotor de soufflante comprenant un disque muni d'alvéoles à sa périphérie et des aubes respectivement rattachées audit rotor, chaque aube comportant un pied d'aube engagé dans une alvéole correspondante et chaque alvéole renfermant une cale allongée intercalée entre le pied d'aube et le fond de l'alvéole, caractérisé en ce que ladite cale est en matériau élastiquement déformable, en ce qu'au moins un tronçon longitudinal de cette cale a un profil transversal en forme d'arc pour définir deux zones latérales en contact avec des zones latérales correspondantes du pied d"aube et éloignées du fond de l'alvéole et une zone centrale en regard de la zone centrale correspondante du fond d'alvéole.To this end, the invention relates first of all to a fan rotor comprising a disk provided with cells at its periphery and blades respectively attached to said rotor, each blade comprising a blade root engaged in a corresponding cell and each cell containing an elongated shim interposed between the blade root and the bottom of the cell, characterized in that said shim is of elastically deformable material, in that at least one longitudinal section of this shim has a transverse profile in the form of arc to define two lateral zones in contact with corresponding lateral zones of the blade root and remote from the bottom of the cell and a central zone facing the corresponding central zone of the cell bottom.

Selon une autre caractéristique avantageuse, la zone centrale dudit tronçon est éloignée de la zone centrale correspondante du pied d'aube. Autrement dit, un léger espace subsiste entre la zone centrale du tronçon de la cale et la zone centrale en regard du pied d'aube.According to another advantageous characteristic, the central zone of said section is remote from the corresponding central zone of the blade root. In other words, a slight gap remains between the central zone of the section of the hold and the central area facing the blade root.

Selon une autre caractéristique avantageuse, la cale est constituée de plusieurs tronçons précités réunis par des jonctions plus étroites.According to another advantageous characteristic, the wedge consists of several aforementioned sections joined by narrower junctions.

Selon une autre caractéristique avantageuse, la cale a un profil ondé suivant sa propre direction longitudinale.According to another advantageous characteristic, the wedge has a wavy profile along its own longitudinal direction.

Plus précisément, ladite cale peut présenter longitudinalement une région centrale en contact avec le fond de l'alvéole et deux régions extrêmes (de part et d'autre de la région centrale, longitudinalement) en contact avec le pied d'aube.More specifically, said wedge may longitudinally have a central region in contact with the bottom of the cell and two end regions (on either side of the central region, longitudinally) in contact with the blade root.

De plus, la section de la cale, en fonctionnement normal, est adaptée à la forme des pièces environnantes (alvéole du disque de soufflante et aube de soufflante) et le montage se fait avec une légère contrainte entre le pied d'aube et le fond de l'alvéole. Ainsi, le pied d'aube est plaqué sur ses portées, en prenant appui sur le fond de l'alvéole (dans la partie centrale) et en dessous du pied d'aube sur les portées latérales de celui-ci. Le profil ondé mentionné ci-dessus permet d'optimiser les contacts entre les extrémités et le centre de la cale d'une part et entre l'aube et le disque, d'autre part.In addition, the section of the hold, in normal operation, is adapted to the shape of the surrounding parts (blower disk and fan blade) and the assembly is done with a slight constraint between the blade root and the bottom. of the cell. Thus, the dawn foot is plated on its bearing, bearing on the bottom of the cell (in the central part) and below the blade root on the lateral surfaces of it. The wavy profile mentioned above optimizes the contacts between the ends and the center of the wedge on the one hand and between the blade and the disk, on the other hand.

La cale, par sa souplesse suit le mouvement combiné de torsion-plongée lorsque survient un évènement critique. Elle vient s'intercaler pour limiter le choc entre le pied d'aube et l'alvéole du disque. De plus, la zone de contact entre la cale et le dessous du pied d'aube est de forme courbe de façon à permettre un glissement relatif des deux pièces entre elles, lors d'un pivotement de l'aube.The wedge, by its flexibility follows the combined movement of torsion-diving when a critical event occurs. It comes to interpose to limit the shock between the dawn foot and the alveolus of the disc. In addition, the contact zone between the wedge and the underside of the blade root is curved so as to allow relative sliding of the two parts together, during pivoting of the blade.

De préférence, la cale est divisée en trois sections qui réagissent séparément aux mouvements combinés du pied d'aube et permettent d'accompagner au mieux les mouvements et déformations spécifiques à chacune des parties du pied d'aube.Preferably, the wedge is divided into three sections which react separately to the combined movements of the blade root and make it possible to better accompany the movements and deformations specific to each part of the blade root.

Un revêtement de type film polyuréthane ou analogue est disposé sur et/ou sous la cale pour permettre de dissiper une partie de l'énergie du choc et par conséquent de limiter les risques de rupture de la cale et de fissuration du pied d'aube.A polyurethane film-like coating or the like is disposed on and / or under the shim to help dissipate some of the energy of the impact and therefore limit the risk of breakage of the wedge and cracking of the blade root.

Avantageusement, la cale est en un matériau composite élastique monobloc et de préférence en matériau composite tissé 3D.Advantageously, the wedge is made of a one-piece elastic composite material and preferably of 3D woven composite material.

Le résultat est particulièrement avantageux lorsque les aubes sont elles-mêmes en matériau composite de même nature.The result is particularly advantageous when the blades themselves are of composite material of the same nature.

Bien entendu, l'invention concerne également une cale destinée à être insérée dans une alvéole de rotor de soufflante, caractérisée en ce qu'elle est constituée d'un matériau élastiquement déformable et en ce qu'elle comporte au moins un tronçon longitudinal à profil transversal en forme d'arc.Of course, the invention also relates to a wedge intended to be inserted in a blower rotor cell, characterized in that it consists of an elastically deformable material and in that it comprises at least one longitudinal profile section. cross-shaped arc.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue générale en perspective d'une cale destinée à être insérée entre un pied d'aube et le fond d'une alvéole définie à la périphérie d'un disque de rotor ;
  • la figure 2 illustre la même cale, vue en coupe longitudinale et en position entre un pied d'aube et le fond d'une alvéole ;
  • la figure 3 est une vue schématique en coupe transversale illustrant les positions relatives de la cale et du pied d'aube à l'intérieur d'une alvéole d'un disque de rotor, la coupe correspondant à la ligne III-III de la figure 1 ; et
  • la figure 4 est une vue analogue à la figure 3 illustrant le comportement de ces éléments lors d'un évènement critique.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the description which follows, given solely by way of example and with reference to the appended drawings in which:
  • the figure 1 is a general perspective view of a wedge intended to be inserted between a blade root and the bottom of a cell defined at the periphery of a rotor disc;
  • the figure 2 illustrates the same wedge, seen in longitudinal section and in position between a blade root and the bottom of a cell;
  • the figure 3 is a schematic cross-sectional view illustrating the relative positions of the wedge and the blade root inside a cell of a rotor disc, the section corresponding to the line III-III of the figure 1 ; and
  • the figure 4 is a view similar to the figure 3 illustrating the behavior of these elements during a critical event.

Sur les dessins, on a représenté une cale 11 destinée à être insérée dans une alvéole 13 d'un disque 15 de rotor de soufflante. Un tel disque est représenté partiellement sur les figures 2 à 4. La cale 11 est constituée d'un seul bloc de matériau élastiquement déformable et plus particulièrement ici d'un matériau composite tissé 3D connu en soi. On rappelle que le tissage en 3 dimensions définissant l'âme de la pièce est enrobé de résine.In the drawings, there is shown a shim 11 intended to be inserted into a cavity 13 of a fan rotor disc 15. Such a disk is partially represented on the Figures 2 to 4 . The shim 11 consists of a single block of elastically deformable material and more particularly here a composite woven 3D known per se. It is recalled that the 3-dimensional weave defining the core of the piece is coated with resin.

Comme représenté, la cale comporte au moins un tronçon longitudinal à profil transversal en forme d'arc. Dans l'exemple, on a prévu trois tronçons 17a, 17b, 17c de ce genre (leurs nombre pourrait être différent) réunis par des jonctions 18 plus étroites, du même matériau, l'ensemble formant une seule pièce.As shown, the shim comprises at least one longitudinal section arcuate cross section. In the example, there are provided three sections 17a, 17b, 17c of this kind (their number could be different) joined by narrower junctions 18 of the same material, all forming a single piece.

Une telle cale est destinée à être insérée dans une alvéole tangentielle 13 pratiquée à la périphérie du disque 15 de rotor. Dans l'exemple, il s'agit d'un disque de rotor de soufflante auquel sont rattachées des aubes 20. Chaque aube comporte un pied d'aube 21 engagé dans une alvéole 13 correspondante. Une cale telle que celle qui est représentée aux figures 1 et 2 est logée dans chaque alvéole 13 en étant intercalée entre le pied d'aube 21 et le fond 13a de l'alvéole 13.Such shim is intended to be inserted into a tangential cavity 13 made at the periphery of the rotor disc 15. In the example, it is a fan rotor disk to which blades 20 are attached. Each blade comprises a blade root 21 engaged in a corresponding cell 13. A hold such as that shown in Figures 1 and 2 is housed in each cell 13 being interposed between the blade root 21 and the bottom 13a of the cell 13.

Comme indiqué précédemment, la cale 11 est de préférence en matériau composite tissé 3D. D'une façon plus générale, la cale est en matériau élastiquement déformable.As indicated above, the shim 11 is preferably made of 3D woven composite material. In a more general way, the wedge is of elastically deformable material.

Selon une caractéristique importante de l'invention, le ou chaque tronçon longitudinal 17a-17c de cette cale a un profil transversal en forme d'arc pour définir deux zones latérales 25a, 25b en contact avec des zones latérales 26a, 26b correspondantes du pied d'aube 20 tout en étant éloignées du fond de l'alvéole. Par ailleurs, une zone centrale 29 du tronçon de cale se situe en regard de la zone centrale 30 correspondante du fond d'alvéole. Cette zone centrale du tronçon de cale peut être en contact avec le fond de l'alvéole, comme cela est visible sur la figure 3.According to an important characteristic of the invention, the or each longitudinal section 17a-17c of this wedge has a transverse profile in the form of an arc to define two lateral zones 25a, 25b in contact with corresponding lateral zones 26a, 26b of the foot of dawn 20 while being away from the bottom of the cell. Furthermore, a central zone 29 of the wedge section is located opposite the corresponding central zone 30 of the cell bottom. This central zone of the wedge section may be in contact with the bottom of the cell, as is visible on the figure 3 .

Par ailleurs, la zone centrale dudit tronçon peut être éloignée de la zone centrale correspondante du pied d'aube, en laissant subsister un léger espace 32 entre elles.Furthermore, the central zone of said section may be remote from the corresponding central area of the blade root, leaving a slight gap 32 between them.

Comme le montre la figure 2, la cale 11 a un profil ondé suivant sa direction longitudinale. Dans l'exemple représenté, la cale présente longitudinalement une région centrale 11a en contact avec le fond de l'alvéole et deux régions extrêmes 11b en contact avec le pied d'aube mais éloignées du fond de l'alvéole. Dans la présentation de la figure 2, la cale est représentée montée sous contrainte entre le pied d'aube et le fond de l'alvéole, en sorte que sa courbure longitudinale entre le centre et les extrémités est inférieure à ce qu'elle est à l'état non contraint, avant montage.As shown in figure 2 , the wedge 11 has a wavy profile in its longitudinal direction. In the example shown, the wedge longitudinally has a central region 11a in contact with the bottom of the cell and two end regions 11b in contact with the blade root but remote from the bottom of the cell. In the presentation of the figure 2 , the wedge is shown mounted under stress between the blade root and the bottom of the cell, so that its longitudinal curvature between the center and the ends is less than it is in the unconstrained state, before mounting.

Un revêtement de type film polyuréthane ou analogue est disposé sur et/ou sous la cale. Ceci permet de dissiper une partie de l'énergie du choc, en cas d'incident, et par conséquent de limiter les risques de rupture de la cale ou de fissuration du pied d'aube.A polyurethane film-like coating or the like is disposed on and / or under the shim. This makes it possible to dissipate part of the energy of the shock, in the event of an incident, and consequently to limit the risks of breakage of the wedge or cracking of the blade root.

Comme mentionné précédemment, ce type de cale est bien adapté pour maintenir une aube en matériau composite tissé 3D dans son alvéole, au repos ou en fonctionnement normal.As mentioned above, this type of shim is well adapted to maintain a blade of 3D woven composite material in its cell, at rest or in normal operation.

Des trous oblongs 35 sont en outre pratiqués dans les zones centrales d'au moins certains tronçons, pour améliorer encore la souplesse et la déformabilité des différentes parties de la cale. Comme on le voit sur la figure 3, la forme de la cale conjuguée à la forme classique du pied d'aube permet d'optimiser les contacts entre les extrémités et le centre de la cale d'une part ainsi que le contact entre le pied d'aube et les parois de l'alvéole d'autre part. On remarque que le tronçon de cale présente en outre deux amincissements 36 entre les parties latérales en contact avec le pied d'aube et la partie médiane en regard du fond de l'alvéole.Oblong holes 35 are furthermore made in the central zones of at least some sections, to further improve the flexibility and the deformability of the different parts of the hold. As we see on the figure 3 the shape of the wedge combined with the classic shape of the blade root optimizes the contacts between the ends and the center of the wedge on the one hand and the contact between the blade root and the walls of the blade. cell on the other hand. Note that the wedge section has two further thinning 36 between the side portions in contact with the blade root and the middle portion facing the bottom of the cell.

De plus, chaque jonction 18 reliant deux tronçons 17a-17c adjacents se situe sensiblement dans le prolongement et la continuité des zones centrales de ces deux tronçons, qu'elle réunit. En outre, ladite jonction a un profil transversal sensiblement identique à celui de la zone centrale d'un tronçon précité.In addition, each junction 18 connecting two adjacent sections 17a-17c is substantially in the extension and continuity of the central zones of these two sections, it joins. In addition, said junction has a transverse profile substantially identical to that of the central zone of a aforementioned section.

Ainsi, la solution proposée qui consiste à donner une forme adaptée à la cale et de préférence à la réaliser dans un matériau souple identique au matériau de l'aube composite permet de supprimer les risques de fissuration du pied d'aube.Thus, the proposed solution which consists in giving a form adapted to the wedge and preferably in making it in a flexible material identical to the material of the composite blade makes it possible to eliminate the risk of cracking the blade root.

La précontrainte au montage permet de bien plaquer le pied d'aube sur ses portées, en prenant appui sur le fond de l'alvéole du disque.The preload assembly allows to properly press the blade root on its bearing, bearing on the bottom of the cavity of the disc.

La forme ondée de la cale, dans le sens axial, permet d'optimiser les contacts entre les extrémités et le centre de la cale d'une part et entre l'aube et le disque d'autre part.The wavy shape of the wedge, in the axial direction, optimizes the contacts between the ends and the center of the wedge on the one hand and between the blade and the disk on the other hand.

Comme représenté dans la figure 4, la cale, par sa souplesse, suit le mouvement combiné de torsion/plongée du pied d'aube, lors d'un évènement critique. La cale vient s'intercaler pour limiter le choc entre le pied d'aube et l'alvéole du disque. De plus, la zone en contact entre la cale et le dessous du pied d'aube est de forme courbe, ce qui permet un glissement relatif des deux pièces lors d'un pivotement important.As represented in the figure 4 the wedge, by its flexibility, follows the combined movement of torsion / diving of the foot of dawn, during a critical event. The wedge is interposed to limit the impact between the blade root and the disk cavity. In addition, the area in contact between the wedge and the underside of the blade root is of curved shape, which allows a relative sliding of the two parts during a large pivot.

Les trois tronçons de la cale réagissent séparément au mouvement de l'aube, ce qui permet d'accompagner au mieux le déplacement de chacune des parties du pied de l'aube.The three sections of the hold react separately to the movement of the dawn, which allows to better accompany the movement of each part of the foot of the dawn.

Claims (11)

  1. A fan rotor comprising a disk with slots in its periphery and respective blades attached to said rotor, each blade (20) including a blade root (21) engaged in a corresponding slot (13), and each slot containing an elongate spacer (11) interposed between the blade root and the bottom of the slot, said spacer being made of an elastically deformable material, the rotor being characterized in that at least one longitudinal segment (17a-17c) of said spacer presents a transverse profile of arcuate shape to define two lateral zones in contact with corresponding lateral zones of a blade root and spaced apart from the bottom of the slot, together with the corresponding central zone of the bottom of the slot.
  2. A rotor according to claim 1, characterized in that said central zone (29) of said segment is spaced apart from the corresponding central zone of the blade root.
  3. A rotor according to claim 1 or claim 2, characterized in that said spacer is constituted by a plurality of said segments (17a-17c) interconnected by narrower junctions (18).
  4. A rotor according to claim 3, characterized in that each junction (18) is situated substantially extending and in continuity with the central zones of the two segments it unites.
  5. A rotor according to claim 4, characterized in that said junction (18) has a transverse profile that is substantially identical to that of the central zone of a said segment.
  6. A rotor according to any preceding claim, characterized in that said spacer (11) presents a wave profile (Figure 2) in its longitudinal direction.
  7. A rotor according to claim 6, characterized in that said spacer presents, longitudinally, a central region (11a) in contact with the bottom of the slot and two end regions (11b) in contact with the blade root.
  8. A rotor according to claim 6 or claim 7, characterized in that said spacer (11) is mounted under stress between the blade root (21) and the bottom (13a) of the slot.
  9. A rotor according to any preceding claim, characterized in that said spacer is made of a 3D-woven composite material.
  10. A rotor according to any preceding claim, characterized in that the blades (20) are made of 3D-woven composite material.
  11. A turbomachine, characterized in that it includes a rotor according to any one of claims 1 to 10.
EP08159121.6A 2007-06-26 2008-06-26 Fan rotor Active EP2009245B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0756015A FR2918129B1 (en) 2007-06-26 2007-06-26 IMPROVEMENT TO AN INTERCALE BETWEEN A FOOT OF DAWN AND THE BACKGROUND OF THE ALVEOLE OF THE DISK IN WHICH IT IS MOUNTED

Publications (3)

Publication Number Publication Date
EP2009245A1 EP2009245A1 (en) 2008-12-31
EP2009245B1 true EP2009245B1 (en) 2017-10-04
EP2009245B2 EP2009245B2 (en) 2020-12-16

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EP08159121.6A Active EP2009245B2 (en) 2007-06-26 2008-06-26 Fan rotor

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US (2) US8529209B2 (en)
EP (1) EP2009245B2 (en)
JP (1) JP5496476B2 (en)
CA (1) CA2634942C (en)
FR (1) FR2918129B1 (en)
RU (1) RU2479724C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3124546A1 (en) 2021-06-28 2022-12-30 Safran Aircraft Engines ROTOR BLADE WITH IMPROVED HOLD, METHOD FOR MANUFACTURING SUCH A BLADE AND ROTOR COMPRISING SUCH BLADE
FR3132126A1 (en) * 2022-01-24 2023-07-28 Safran Aircraft Engines Aircraft engine comprising blades fixed to the casing

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2945074B1 (en) * 2009-04-29 2011-06-03 Snecma REINFORCED BLOW OF BREATHING BLADE
US8616850B2 (en) * 2010-06-11 2013-12-31 United Technologies Corporation Gas turbine engine blade mounting arrangement
EP2455588B1 (en) * 2010-11-15 2017-03-01 MTU Aero Engines GmbH Securing module for axial securing of a root of a turbo engine blade
IT1403416B1 (en) * 2010-12-21 2013-10-17 Avio Spa BORED ROTOR OF A GAS TURBINE FOR AERONAUTICAL ENGINES AND METHOD FOR COOLING OF THE BORED ROTOR
GB201106278D0 (en) * 2011-04-14 2011-05-25 Rolls Royce Plc Annulus filler system
FR2975428B1 (en) * 2011-05-17 2015-11-20 Snecma TURBOMACHINE AUBES WHEEL
EP2562356A1 (en) * 2011-08-24 2013-02-27 Siemens Aktiengesellschaft Blade assembly
FR2981132B1 (en) * 2011-10-10 2013-12-06 Snecma DISCHARGE COOLING TURBOMACHINE ASSEMBLY
US8851854B2 (en) 2011-12-16 2014-10-07 United Technologies Corporation Energy absorbent fan blade spacer
US9422819B2 (en) * 2012-12-18 2016-08-23 United Technologies Corporation Rotor blade root spacer for arranging between a rotor disk and a root of a rotor blade
US9359906B2 (en) * 2012-12-18 2016-06-07 United Technologies Corporation Rotor blade root spacer with a fracture feature
US20150322805A1 (en) * 2012-12-27 2015-11-12 United Technologies Corporation Blade underroot spacer with hook removal
EP2946080B1 (en) 2013-01-17 2018-05-30 United Technologies Corporation Rotor blade root spacer with grip element
US9840922B2 (en) 2014-03-07 2017-12-12 United Technologies Corporation Fan blade spacer
US20160024946A1 (en) * 2014-07-22 2016-01-28 United Technologies Corporation Rotor blade dovetail with round bearing surfaces
GB201417417D0 (en) * 2014-10-02 2014-11-19 Rolls Royce Plc Slider
US10099323B2 (en) 2015-10-19 2018-10-16 Rolls-Royce Corporation Rotating structure and a method of producing the rotating structure
FR3102206B1 (en) * 2019-10-18 2023-02-17 Safran Aircraft Engines Assembly for a turbomachine blade comprising a clip defining a cell and a wedge adapted to be received in the cell at the same time as a root of the blade
RU198476U1 (en) * 2020-02-03 2020-07-13 Акционерное общество "Объединенная двигателестроительная корпорация" (АО "ОДК") ROTOR DISC OF GAS TURBINE ENGINE FROM NICKEL HEAT RESISTANT ALLOY
US11242761B2 (en) 2020-02-18 2022-02-08 Raytheon Technologies Corporation Tangential rotor blade slot spacer for a gas turbine engine
FR3107724B1 (en) 2020-02-27 2022-06-24 Safran Aircraft Engines Fan rotor with variable pitch blades and turbomachine equipped with such a rotor
KR102454379B1 (en) * 2020-09-08 2022-10-14 두산에너빌리티 주식회사 rotor and turbo-machine comprising the same
US20230383658A1 (en) 2020-10-16 2023-11-30 Safran Aircraft Engines Fastening assembly for a turbomachine blade
FR3120389B1 (en) 2021-03-04 2023-06-02 Safran Aircraft Engines Set for a rotor for a turbomachine
FR3121171B1 (en) 2021-03-25 2023-04-14 Safran Aircraft Engines Fan rotor for a turbomachine
FR3139159B1 (en) * 2022-08-31 2024-07-19 Safran Aircraft Engines TURBINE WHEEL INCLUDING A RADIAL DEVICE FOR HOLDING BLADE FOOT IN THE CELLS OF A ROTOR DISC
US20240141794A1 (en) * 2022-10-28 2024-05-02 Raytheon Technologies Corporation Deformable root spacer for a gas turbine engine rotor blade

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU443192A1 (en) * 1972-11-14 1974-09-15 Моторостроительное конструкторское бюро Device for compacting turbine blades
JP2500245Y2 (en) * 1991-04-12 1996-06-05 川崎重工業株式会社 Blade fixing device
US5519677A (en) * 1993-03-22 1996-05-21 Sony Corporation Biaxial actuator for driving an objective lens in both focusing and tracking directions
DE4430636C2 (en) * 1994-08-29 1997-01-23 Mtu Muenchen Gmbh Device for fixing the rotor blades and eliminating rotor imbalances in compressors or turbines of gas turbine engines with axial flow
US5518369A (en) * 1994-12-15 1996-05-21 Pratt & Whitney Canada Inc. Gas turbine blade retention
FR2807096B1 (en) * 2000-03-30 2002-05-31 Abb Alstom Power Nv ROTOR DISC OF TURBINE EQUIPPED WITH FINS ON FOOT AND TREE OF MOUNTING A FIN ON A DISC
FR2841609B1 (en) * 2002-06-27 2004-09-10 Snecma Moteurs BLOWER RETAINER LEVEL RETAINER
US6773234B2 (en) † 2002-10-18 2004-08-10 General Electric Company Methods and apparatus for facilitating preventing failure of gas turbine engine blades
RU2227150C1 (en) * 2002-12-10 2004-04-20 Открытое акционерное общество "Термостойкие изделия и инженерные разработки" The laminar sealing material for a gasket
JP2005273646A (en) * 2004-02-25 2005-10-06 Mitsubishi Heavy Ind Ltd Moving blade element and rotary machine having the moving blade element
GB0424481D0 (en) * 2004-11-05 2004-12-08 Rolls Royce Plc Composite aerofoil
FR2881174B1 (en) * 2005-01-27 2010-08-20 Snecma Moteurs DEVICE FOR POSITIONING A DASHBOARD AND AUBAGE DISK COMPRISING SUCH A DEVICE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3124546A1 (en) 2021-06-28 2022-12-30 Safran Aircraft Engines ROTOR BLADE WITH IMPROVED HOLD, METHOD FOR MANUFACTURING SUCH A BLADE AND ROTOR COMPRISING SUCH BLADE
FR3132126A1 (en) * 2022-01-24 2023-07-28 Safran Aircraft Engines Aircraft engine comprising blades fixed to the casing

Also Published As

Publication number Publication date
CA2634942C (en) 2015-12-01
US8845294B2 (en) 2014-09-30
RU2479724C2 (en) 2013-04-20
FR2918129A1 (en) 2009-01-02
JP5496476B2 (en) 2014-05-21
US20090004017A1 (en) 2009-01-01
US20130259695A1 (en) 2013-10-03
EP2009245B2 (en) 2020-12-16
US8529209B2 (en) 2013-09-10
RU2008125805A (en) 2009-12-27
FR2918129B1 (en) 2009-10-30
EP2009245A1 (en) 2008-12-31
CA2634942A1 (en) 2008-12-26
JP2009008079A (en) 2009-01-15

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