EP2817491B1 - Linear seal of an inter-blade platform, and associated inter-blade platform, rotor and turbojet engine - Google Patents

Linear seal of an inter-blade platform, and associated inter-blade platform, rotor and turbojet engine Download PDF

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Publication number
EP2817491B1
EP2817491B1 EP13710460.0A EP13710460A EP2817491B1 EP 2817491 B1 EP2817491 B1 EP 2817491B1 EP 13710460 A EP13710460 A EP 13710460A EP 2817491 B1 EP2817491 B1 EP 2817491B1
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EP
European Patent Office
Prior art keywords
blade
linear
inter
lip
gasket
Prior art date
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Application number
EP13710460.0A
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German (de)
French (fr)
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EP2817491A1 (en
Inventor
Anne-Laure RAVIER
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Safran Aircraft Engines SAS
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SNECMA Services SA
SNECMA SAS
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Publication of EP2817491A1 publication Critical patent/EP2817491A1/en
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Classifications

    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • F01D11/006—Sealing the gap between rotor blades or blades and rotor
    • F01D11/008—Sealing the gap between rotor blades or blades and rotor by spacer elements between the blades, e.g. independent interblade platforms

Definitions

  • the invention relates to a linear inter-blade platform joint.
  • a linear joint is disposed between a blade and an inter-blade platform separate from the blade, and is intended to limit the flow of air between the blade and the inter-blade platform.
  • Such a seal is particularly used, but not only, in the blowers (or "fan” in English) of a jet engine, between the fan blades and the inter-blade platforms.
  • a linear inter-blade platform joint having a length, comprising a linear base for attachment to the inter-blade platform, and a linear lip extending from the linear base, said linear lip having a linear distal end portion. configured to contact a wall on the side of a lower surface or a wall on the side of an upper surface of a blade, a linear groove being formed between the linear base and the linear lip over at least a portion of the length of said joint.
  • This type of seal extends along the intrados or extrados of a blade, including the leading edge and / or the trailing edge.
  • the lip of this type of known joint does not make it possible to marry correctly the blade in the areas of sudden discontinuity or small radius of curvature, such as for example in the vicinity of the leading edge or the trailing edge of the dawn .
  • the tightness of the air stream (or gas) is imperfect, which deteriorates the performance of the turbojet engine.
  • the object of the present invention is to remedy at least substantially the disadvantage mentioned above.
  • the invention achieves its object by providing a linear seal of the aforementioned type wherein the linear distal end portion has at least one linear groove extending over at least a portion of the length of said seal.
  • joint may be used in place of "linear joint", “linear base”, “Linear lip”, “linear groove”, “linear groove” and “linear distal end portion” while designating the same entity.
  • platform can be used instead of “inter-blade platform” while designating the same entity.
  • the linear joint extends in a preferred direction, the longitudinal direction.
  • This longitudinal direction is not necessarily rectilinear, and is preferably configured to follow the contours of the dawn, especially in the vicinity of the discontinuities of the dawn.
  • the direction of the length follows the neutral fiber of the joint.
  • the length of the joint is thus defined and measured parallel to this longitudinal direction.
  • the linear lip, the linear base and the linear groove extend in this longitudinal direction.
  • the length of the lip, the length of the base and the length of the groove are defined and measured also parallel to this longitudinal direction. It is understood that the lip extends in width in a direction transverse to the longitudinal direction from the base.
  • the groove is defined between the base and the lip in the joint portions where the base and the lip form an angle less than 90 ° (eighty ten degrees of angle), the angle being measured in a section transverse to the longitudinal direction.
  • the linear distal end portion is a portion that extends in length in the longitudinal direction, and in width a distance of about 20% of the width of the lip. It is therefore understood that the linear distal end portion is disposed opposite the junction zone between the lip and the base. At least one linear groove is provided in the linear distal end portion and extends in the longitudinal direction.
  • the distal end portion is locally more flexible than the same distal end portion not having such a groove.
  • the groove thus allows the lip to better fit the contour of a blade, especially in areas of sharp discontinuity or low radius of curvature of the blade, compared to the joints of the state of the art.
  • the seal being locally more flexible thanks to this groove, it adapts to the shape of the blade undergoing less mechanical stress and wear than the joints of the state of the art, which improves the lifetime of the seal according to the invention compared to the joints of the state of the art.
  • the at least one linear groove is formed in a lip segment configured to contact the blade in the vicinity of a leading edge of the blade and / or in the vicinity of a trailing edge of the blade.
  • a lip segment is a portion of the lip considered in the longitudinal direction.
  • the leading edge and the trailing edge of a blade are the regions with the most abrupt discontinuities.
  • the linear groove extends over the entire length of the linear lip.
  • the distal end portion has a local flexibility allowing the lip to conform to the contact surface of the blade over its entire length. This ensures a better ability of the seal to make a sealed contact with the walls of the blade.
  • the inter-blade linear joint has an evolutive cross section along the length of the joint.
  • the shape of the cross section of the linear joint i.e. a section perpendicular to the longitudinal direction of the joint
  • the seal is adapted to marry the dawn as best as possible according to the shape of the blade.
  • the cross section of the platform is scalable and / or the cross section of the lip is scalable.
  • the base has a shoulder configured to cooperate with an inter-blade platform edge.
  • the linear joint is generally disposed along an edge of a platform, said edge being intended to come opposite the side of the intrados or extrados of the blade.
  • a shoulder allows to correctly position the seal relative to the platform during the assembly of the seal to the platform. With such a shoulder, the seal thus has a protective portion covering said edge of the platform. Such a portion of protection makes it possible to damp any shocks between the blade and the platform (or portions facing two adjacent platforms), if the latter came into contact.
  • the inter-blade linear joint comprises at least one lip stiffener.
  • Such a stiffener makes it possible to rigidify the lip generally on a lip segment, the lip thus being better pressed against the wall of the blade.
  • the lip is pressed against the wall of the blade while thanks to the groove, the distal end of the lip perfectly matches the shape of the wall of the blade and makes a tight contact.
  • the invention also relates to an inter-blade platform comprising a linear inter-blade platform joint according to the invention.
  • the invention furthermore relates to a rotor comprising a disk on the periphery of which are mounted a plurality of blades and a plurality of inter-blade platforms, an inter-blade platform being disposed between each pair of adjacent blades, at least one of inter-blade platforms comprising at least one linear inter-blade platform joint according to the invention.
  • the lip of said linear seal is configured to cooperate with a blade root under a leading edge of said blade, in the vicinity of said leading edge.
  • a blade successively presents, in a direction of height, a foot and an aerodynamic profile, the foot being the part by which the blade is fixed to the disk.
  • the aerodynamic profile is the part of the blade that mixes the air, this profile comprising a leading edge, a trailing edge, a lower surface and an upper surface.
  • the foot has an intermediate portion that is not engaged with the disc. It is understood that the seal cooperates with the blade in this intermediate part.
  • the term "below" is relative to the direction of height of the blade, the blade root defining the bottom of the blade and the aerodynamic profile defining the top of the blade.
  • the seal is placed below the leading edge it is understood that the seal is placed, in the direction of the height, the bottom side of the blade relative to the transition zone between the foot and the aerodynamic profile of the dawn, directly above the leading edge.
  • neighborehood means that the joint is disposed in the direction of height in an area extending about 10% of the total height dawn below the leading edge, and in the longitudinal direction in an area centered on the leading edge and extending about 20% of the length of the blade.
  • At least two inter-blade platforms each comprise at least one linear inter-blade platform joint according to the invention, the at least two inter-blade platforms being adjacent to one and the same blade, said at least one linear joint of one inter-blade platform among the at least two inter-blade platforms being disposed opposite said at least one linear joint of the other inter-blade platform among the at least two inter-blade platforms upstream of an edge driving and / or downstream of a trailing edge of said blade, said linear seals cooperating in support upstream of the leading edge and / or downstream of the trailing edge of said blade.
  • Upstream and downstream refer to the direction of flow of air (or gases) along the blade, the air flowing generally from the leading edge to the trailing edge. It is understood that two adjacent platforms which enclose a blade each comprise a seal according to the invention on their edge vis-à-vis said blade. These joints extend beyond the leading edge and the trailing edge with respect to the blade (ie the joints are longer than the blade), and cooperate directly with each other in support in these areas beyond the leading edge and the trailing edge.
  • the invention furthermore relates to a turbojet engine comprising a rotor according to the invention.
  • the figure 1 represents a turbojet engine 100, comprising a fan 80 forming a rotor according to the invention.
  • the blower 80 comprises a disc 82, on the periphery of which are mounted a plurality of blades 50 and a plurality of inter-blade platform 40, each blade 50 being interposed between two inter-blade platform 40.
  • each platform 40 is disposed between a pair of adjacent blades 50.
  • each edge 42a and 42b of each platform 40 respectively vis-à-vis the side of the lower surface 52a and the side of the upper surface 52b of a blade 50, is respectively equipped with a linear joint 10 and a linear joint 10 'according to the invention.
  • Each linear joint 10 and 10 'respectively has a linear base 12 and 12' and a linear lip 14 and 14 ', a linear groove 16 and 16' being respectively formed between the base 12 and the lip 14 and the base 12 'and the base 14 '.
  • the seal 10 is configured to cooperate with the blade 50 on the side of the lower surface 52a while the seal 10 'is configured to cooperate with the blade 50 on the side of the upper surface 52b.
  • Each blade 50 successively has, according to the height H, a foot 51 and an airfoil 52.
  • the foot 51 has a portion 51a engaged in the disc 82 and an intermediate portion 51b.
  • the aerodynamic profile 52 has the lower surface 52a, the upper surface 52b, a leading edge 52c and a trailing edge 52d (cf. fig.4 ).
  • the wall on the underside side and the wall on the underside side are substantially continuous (ie does not show any noticeable difference) between the intermediate portion 51b of the foot 51 and the airfoil 52, so that the wall on the side of the intrados and the wall on the side of the upper surface of the blade at the root of the blade are sometimes also called intrados and extrados.
  • the lip 14 of the seal 10 cooperates with the root 51 of the blade 50, below the leading edge 52c of the blade 50, in the vicinity of said leading edge 52c.
  • the seal 10 also cooperate with the root 51 of the blade 50, below the leading edge 52c of the blade 50, in the vicinity of said leading edge 52c.
  • the figure 3 is a partial view which represents the blade 50 only in part (a part of the intermediate part 51a and a part of the aerodynamic profile 52) and a part of the platform 40 and the seal 10.
  • the figure 4 is a view of a blade 50 and two platforms 40 according to the arrow IV of the figure 2 .
  • the seals 10 and 10 ' extend from upstream of the leading edge 52c of the blade 50 to the downstream of the trailing edge 52d of the blade 50.
  • each seal 10 and 10' presents a segment 10a, 10'a extending upstream of the trailing edge 52c, a segment 10b, 10'b extending respectively opposite the side of the lower surface 52a and the side of the extrados 52b of the blade 50, and a segment 10c, 10'c which extends downstream of the trailing edge 52d of the blade 50.
  • the upstream and downstream are considered according to the flow of air, represented by the arrow C, along the blade 50, the arrow C being oriented from upstream to downstream.
  • Each segment of seal extends over a longitudinal portion of the seal.
  • the longitudinal direction of the joints 10 and 10 ' is respectively represented by a discontinuous line L and L'.
  • the upstream segments 10a and 10'a are arranged facing each other so that the lips 14 and 14 'of the seals 10 and 10' cooperate in support with each other in the upstream zone of the dawn 50 (cf. fig.5 ).
  • the downstream segments 10c and 10'c are arranged vis-à-vis one another so that the lips 14 and 14 'of the seals 10 and 10' cooperate in support one with the other in the downstream zone of dawn 50 (cf. fig.9 ).
  • the seals 10 and 10 ' have a linear groove 120 and 122, and 120' and 122 '(cf. Figures 5, 6, 8 and 9 ).
  • These grooves 120, 122 and 120 ', 122' respectively extend in the directions substantially parallel to the longitudinal directions L and L '. It will be noted that along the contour of the blade 50, the longitudinal directions L and L'are substantially parallel to the walls of the blade 50.
  • the linear distal end portions 14a and 14'a comprise a linear groove 120 and 120 '.
  • These Figures 5 and 6 each represent a section of the whole dawn and platforms of the figure 4 in the vicinity of the leading edge 52c of the blade 50.
  • the directions B and B 'respectively substantially parallel to the lips 14 and 14' respectively indicate the direction of the width of the lips 14 and 14 '.
  • the "distal" character of the distal end portion is considered in these directions B and B ', the distal end portion of a lip being opposite the base in the direction of the width of the lip.
  • the figure 7 represents a section of the whole dawn and platforms of the figure 4 in a zone distinct from the vicinity of the leading edge 52c and the trailing edge 52d of the blade 50.
  • the seals 10 and 10 'do not have no linear groove.
  • the cross section of the seals 10 and 10 ', and more particularly of the base 12 and the lip 14 of the seal 10 and the base 12' and the lip 14 'of the seal 10', is progressive along the longitudinal direction L and L ', as can be seen from the Figures 5 to 9 .
  • the figure 10 is a seal segment 10, comprising stiffeners 18.
  • each stiffener 18 has a rib shape formed integrally with the seal 10.
  • a stiffener is formed by a frame disposed in the thickness of the lip, or by a sheath arranged around the lip. Such stiffeners may also be provided for the seal 10 '.
  • the seals 10 and 10 ' respectively have a shoulder 20 and 20' formed in the thickness of the base 12 and 12 '.
  • the base 12 and 12 'each have a protective portion 12a and 12'a covering respectively the edge 42a and 42b of the platform 40.
  • the protective portions 12a and 12'a are thicker in the segments 10a, 10'a, 10c and 10'c (either upstream of the leading edge and downstream of the trailing edge) than in the segments 10b and 10'b. These greater thicknesses in these areas make it possible in particular to stiffen the seals 10 and 10 'in these areas and prevent the lips from turning over (ie pass on the side of the aerodynamic profile 52 of the blade).
  • the seal 10 and 10 ' are preferably elastomeric plastic and manufactured by molding.

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

Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

L'invention concerne un joint linéaire de plateforme inter-aubes. Un tel joint linéaire est disposé entre une aube et une plateforme inter-aubes distincte de l'aube, et vise à limiter la circulation d'air entre l'aube et la plateforme inter-aubes. Un tel joint est notamment utilisé, mais pas uniquement, dans les soufflantes (ou « fan » en anglais) de turboréacteur, entre les aubes de soufflante et les plateformes inter-aubes.The invention relates to a linear inter-blade platform joint. Such a linear joint is disposed between a blade and an inter-blade platform separate from the blade, and is intended to limit the flow of air between the blade and the inter-blade platform. Such a seal is particularly used, but not only, in the blowers (or "fan" in English) of a jet engine, between the fan blades and the inter-blade platforms.

ETAT DE LA TECHNIQUE ANTERIEURESTATE OF THE PRIOR ART

On connait de EP2267277 un joint linéaire de plateforme inter-aubes présentant une longueur, comprenant une base linéaire destinée à être fixée à la plateforme inter-aubes, et une lèvre linéaire s'étendant depuis la base linéaire, ladite lèvre linéaire présentant une portion d'extrémité distale linéaire configurée pour contacter une paroi du côté d'un intrados ou une paroi du côté d'un extrados d'une aube, une gorge linéaire étant formée entre la base linéaire et la lèvre linéaire sur au moins une partie de la longueur dudit joint. Ce type de joint s'étend le long de l'intrados ou de l'extrados d'une aube, y compris le bord d'attaque et/ou le bord de fuite.We know EP2267277 a linear inter-blade platform joint having a length, comprising a linear base for attachment to the inter-blade platform, and a linear lip extending from the linear base, said linear lip having a linear distal end portion. configured to contact a wall on the side of a lower surface or a wall on the side of an upper surface of a blade, a linear groove being formed between the linear base and the linear lip over at least a portion of the length of said joint. This type of seal extends along the intrados or extrados of a blade, including the leading edge and / or the trailing edge.

La lèvre de ce type de joint connu ne permet pas d'épouser correctement l'aube dans les zones de discontinuité brutale ou à faible rayon de courbure, comme par exemple au voisinage du bord d'attaque ou du bord de fuite de l'aube. Il en résulte que de l'air s'écoule entre l'aube et la plateforme inter-aubes dans ces zones. L'étanchéité de la veine d'air (ou de gaz) est donc imparfaite, ce qui détériore les performances du turboréacteur.The lip of this type of known joint does not make it possible to marry correctly the blade in the areas of sudden discontinuity or small radius of curvature, such as for example in the vicinity of the leading edge or the trailing edge of the dawn . As a result, air flows between the dawn and the inter-blade platform in these areas. The tightness of the air stream (or gas) is imperfect, which deteriorates the performance of the turbojet engine.

PRESENTATION DE L'INVENTIONPRESENTATION OF THE INVENTION

Le but de la présente invention est de remédier au moins substantiellement à l'inconvénient mentionné ci-avant.The object of the present invention is to remedy at least substantially the disadvantage mentioned above.

L'invention atteint son but en proposant un joint linéaire du type précité dans lequel la portion d'extrémité distale linéaire présente au moins une rainure linéaire s'étendant sur au moins une partie de la longueur dudit joint.The invention achieves its object by providing a linear seal of the aforementioned type wherein the linear distal end portion has at least one linear groove extending over at least a portion of the length of said seal.

Par la suite, les termes « joint », « base », « lèvre », « gorge », « rainure » et « portion d'extrémité distale » peuvent être utilisés à la place de «joint linéaire », «base linéaire », « lèvre linéaire », «gorge linéaire », « rainure linéaire » et « portion d'extrémité distale linéaire » tout en désignant la même entité. De même le terme « plateforme » peut être utilisé à la place de « plateforme inter-aube » tout en désignant la même entité.Subsequently, the terms "joint", "base", "lip", "groove", "groove" and "distal end portion" may be used in place of "linear joint", "linear base", "Linear lip", "linear groove", "linear groove" and "linear distal end portion" while designating the same entity. Similarly, the term "platform" can be used instead of "inter-blade platform" while designating the same entity.

On comprend que le joint linéaire s'étend selon une direction préférentielle, la direction longitudinale. Cette direction longitudinale n'est pas nécessairement rectiligne, et est préférentiellement configurée pour suivre les contours de l'aube, notamment au voisinage des discontinuités de l'aube. En d'autres termes on peut considérer que la direction de la longueur suit la fibre neutre du joint. La longueur du joint est donc définie et mesurée parallèlement à cette direction longitudinale. De même, la lèvre linéaire, la base linéaire et la gorge linéaire s'étendent selon cette direction longitudinale. La longueur de la lèvre, la longueur de la base et la longueur de la gorge sont définies et mesurée également parallèlement à cette direction longitudinale. On comprend que la lèvre s'étend en largeur dans une direction transverse à la direction longitudinale depuis la base. La gorge est définie entre la base et la lèvre dans les portions de joint où la base et la lèvre forment un angle inférieur à 90° (quatre-vingts dix degrés d'angle), l'angle étant mesuré dans une section transverse à la direction longitudinale. La portion d'extrémité distale linéaire est une portion qui s'étend en longueur selon la direction longitudinale, et en largeur sur une distance d'environ 20% de la largeur de la lèvre. On comprend donc que la portion d'extrémité distale linéaire est disposée à l'opposé de la zone de jonction entre la lèvre et la base. Au moins une rainure linéaire est ménagée dans la portion d'extrémité distale linéaire et s'étend selon la direction longitudinale.It is understood that the linear joint extends in a preferred direction, the longitudinal direction. This longitudinal direction is not necessarily rectilinear, and is preferably configured to follow the contours of the dawn, especially in the vicinity of the discontinuities of the dawn. In other words we can consider that the direction of the length follows the neutral fiber of the joint. The length of the joint is thus defined and measured parallel to this longitudinal direction. Similarly, the linear lip, the linear base and the linear groove extend in this longitudinal direction. The length of the lip, the length of the base and the length of the groove are defined and measured also parallel to this longitudinal direction. It is understood that the lip extends in width in a direction transverse to the longitudinal direction from the base. The groove is defined between the base and the lip in the joint portions where the base and the lip form an angle less than 90 ° (eighty ten degrees of angle), the angle being measured in a section transverse to the longitudinal direction. The linear distal end portion is a portion that extends in length in the longitudinal direction, and in width a distance of about 20% of the width of the lip. It is therefore understood that the linear distal end portion is disposed opposite the junction zone between the lip and the base. At least one linear groove is provided in the linear distal end portion and extends in the longitudinal direction.

Grâce à la rainure linéaire la portion d'extrémité distale est localement plus souple qu'une même portion d'extrémité distale ne présentant pas une telle rainure. La rainure permet donc à la lèvre de mieux épouser le contour d'une aube, notamment dans les zones de discontinuité brutale ou à faible rayon de courbure de l'aube, par rapport aux joints de l'état de la technique. Par ailleurs, le joint étant localement plus souple grâce à cette rainure, il s'adapte à la forme de l'aube en subissant moins de contraintes mécaniques et d'usures que les joints de l'état de la technique, ce qui améliore la durée de vie du joint selon l'invention par rapport aux joints de l'état de la technique.With the linear groove the distal end portion is locally more flexible than the same distal end portion not having such a groove. The groove thus allows the lip to better fit the contour of a blade, especially in areas of sharp discontinuity or low radius of curvature of the blade, compared to the joints of the state of the art. Furthermore, the seal being locally more flexible thanks to this groove, it adapts to the shape of the blade undergoing less mechanical stress and wear than the joints of the state of the art, which improves the lifetime of the seal according to the invention compared to the joints of the state of the art.

Préférentiellement, la au moins une rainure linéaire est formée dans un segment de lèvre configuré pour contacter l'aube au voisinage d'un bord d'attaque de l'aube et/ou au voisinage d'un bord de fuite de l'aube.Preferably, the at least one linear groove is formed in a lip segment configured to contact the blade in the vicinity of a leading edge of the blade and / or in the vicinity of a trailing edge of the blade.

On comprend qu'un segment de lèvre est une portion de la lèvre considérée selon la direction longitudinale. Le bord d'attaque et le bord de fuite d'une aube sont les régions qui présentent les discontinuités les plus brutales. En disposant une rainure dans les segments de lèvre configurés pour venir au contact de l'aube au voisinage du bord d'attaque et du bord de fuite, on s'assure que le joint épousera au mieux la paroi de l'aube, y compris au voisinage du bord d'attaque et du bord de fuite.It is understood that a lip segment is a portion of the lip considered in the longitudinal direction. The leading edge and the trailing edge of a blade are the regions with the most abrupt discontinuities. By providing a groove in the lip segments configured to engage the blade in the vicinity of the leading edge and the trailing edge, it is ensured that the seal will best fit the wall of the blade, including in the vicinity of the leading edge and the trailing edge.

Avantageusement, la rainure linéaire s'étend sur toute la longueur de la lèvre linéaire.Advantageously, the linear groove extends over the entire length of the linear lip.

Dans cette configuration, on s'assure que la portion d'extrémité distale présente une souplesse locale permettant à la lèvre de se conformer à la surface de contact de l'aube sur toute sa longueur. On s'assure ainsi une meilleure capacité du joint à réaliser un contact étanche avec les parois de l'aube.In this configuration, it is ensured that the distal end portion has a local flexibility allowing the lip to conform to the contact surface of the blade over its entire length. This ensures a better ability of the seal to make a sealed contact with the walls of the blade.

Avantageusement, le joint linéaire inter-aubes présente une section transversale évolutive le long de la longueur du joint.Advantageously, the inter-blade linear joint has an evolutive cross section along the length of the joint.

On comprend que la forme de la section transversale du joint linéaire (i.e. une section perpendiculaire à la direction longitudinale du joint) varie selon la direction longitudinale du joint. Grâce à une telle section évolutive, le joint est adapté à épouser l'aube au mieux en fonction de la forme de l'aube.It is understood that the shape of the cross section of the linear joint (i.e. a section perpendicular to the longitudinal direction of the joint) varies in the longitudinal direction of the joint. Thanks to such a progressive section, the seal is adapted to marry the dawn as best as possible according to the shape of the blade.

Selon un mode de réalisation la section transversale de la plateforme est évolutive et/ou la section transversale de la lèvre est évolutive.According to one embodiment the cross section of the platform is scalable and / or the cross section of the lip is scalable.

Avantageusement, la base présente un épaulement configuré pour coopérer avec un bord de plateforme inter-aube.Advantageously, the base has a shoulder configured to cooperate with an inter-blade platform edge.

Le joint linéaire est généralement disposé le long d'un bord d'une plateforme, ledit bord étant destiné à venir en vis-à-vis du côté de de l'intrados ou de l'extrados de l'aube. Un tel épaulement permet de positionner correctement le joint par rapport à la plateforme lors de l'assemble du joint à la plateforme. Grâce à un tel épaulement, le joint présente ainsi une portion de protection recouvrant ledit bord de la plateforme. Une telle portion de protection permet notamment d'amortir les chocs éventuels entre l'aube et la plateforme (ou des parties en vis-à-vis de deux plateformes adjacentes), si ces dernières entraient en contact.The linear joint is generally disposed along an edge of a platform, said edge being intended to come opposite the side of the intrados or extrados of the blade. Such a shoulder allows to correctly position the seal relative to the platform during the assembly of the seal to the platform. With such a shoulder, the seal thus has a protective portion covering said edge of the platform. Such a portion of protection makes it possible to damp any shocks between the blade and the platform (or portions facing two adjacent platforms), if the latter came into contact.

Avantageusement le joint linéaire inter-aubes comprend au moins un raidisseur de lèvre.Advantageously, the inter-blade linear joint comprises at least one lip stiffener.

Un tel raidisseur permet de rigidifier globalement la lèvre sur un segment de lèvre, la lèvre étant ainsi mieux plaquée contre la paroi de l'aube. Ainsi, grâce au raidisseur, la lèvre est plaquée contre la paroi de l'aube tandis que grâce à la rainure, l'extrémité distale de la lèvre épouse parfaitement la forme de la paroi de l'aube et réalise un contact étanche.Such a stiffener makes it possible to rigidify the lip generally on a lip segment, the lip thus being better pressed against the wall of the blade. Thus, thanks to the stiffener, the lip is pressed against the wall of the blade while thanks to the groove, the distal end of the lip perfectly matches the shape of the wall of the blade and makes a tight contact.

L'invention concerne également une plateforme inter-aubes comprenant un joint linéaire de plateforme inter-aubes selon l'invention.The invention also relates to an inter-blade platform comprising a linear inter-blade platform joint according to the invention.

L'invention concerne en outre un rotor comprenant un disque à la périphérie duquel sont montées une pluralité d'aubes et une pluralité de plateformes inter-aubes, une plateforme inter-aubes étant disposée entre chaque paire d'aubes adjacentes, au moins une des plateformes inter-aubes comprenant au moins un joint linéaire de plateforme inter-aubes selon l'invention.The invention furthermore relates to a rotor comprising a disk on the periphery of which are mounted a plurality of blades and a plurality of inter-blade platforms, an inter-blade platform being disposed between each pair of adjacent blades, at least one of inter-blade platforms comprising at least one linear inter-blade platform joint according to the invention.

Avantageusement, la lèvre dudit joint linéaire est configurée pour coopérer avec un pied d'aube sous un bord d'attaque de ladite aube, au voisinage dudit bord d'attaque.Advantageously, the lip of said linear seal is configured to cooperate with a blade root under a leading edge of said blade, in the vicinity of said leading edge.

Une aube présente successivement, selon une direction de hauteur, un pied et un profil aérodynamique, le pied étant la partie par laquelle l'aube est fixée au disque. Le profil aérodynamique est la partie de l'aube qui brasse l'air, ce profil comprenant un bord d'attaque, un bord de fuite, un intrados et un extrados. Le pied présente une partie intermédiaire qui n'est pas en prise avec le disque. On comprend que le joint coopère avec l'aube dans cette partie intermédiaire. Le terme « en dessous » est relatif à la direction de hauteur de l'aube, le pied d'aube définissant le bas de l'aube et le profil aérodynamique définissant le haut de l'aube. Ainsi, en définissant que le joint est placé en dessous du bord d'attaque on comprend que le joint est placé, selon la direction de la hauteur, du côté du bas de l'aube par rapport à la zone de transition entre le pied et le profil aérodynamique de l'aube, à l'aplomb du bord d'attaque. Le terme « voisinage » signifie que le joint est disposé selon la direction de hauteur dans une zone s'étendant sur environ 10% de la hauteur totale de l'aube en dessous du bord d'attaque, et selon la direction longitudinale dans une zone centrée sur le bord d'attaque et s'étendant sur environ 20% de la longueur de l'aube.A blade successively presents, in a direction of height, a foot and an aerodynamic profile, the foot being the part by which the blade is fixed to the disk. The aerodynamic profile is the part of the blade that mixes the air, this profile comprising a leading edge, a trailing edge, a lower surface and an upper surface. The foot has an intermediate portion that is not engaged with the disc. It is understood that the seal cooperates with the blade in this intermediate part. The term "below" is relative to the direction of height of the blade, the blade root defining the bottom of the blade and the aerodynamic profile defining the top of the blade. Thus, by defining that the seal is placed below the leading edge it is understood that the seal is placed, in the direction of the height, the bottom side of the blade relative to the transition zone between the foot and the aerodynamic profile of the dawn, directly above the leading edge. The term "neighborhood" means that the joint is disposed in the direction of height in an area extending about 10% of the total height dawn below the leading edge, and in the longitudinal direction in an area centered on the leading edge and extending about 20% of the length of the blade.

Avantageusement, au moins deux plateformes inter-aubes comprennent chacune au moins un joint linéaire de plateforme inter-aubes selon l'invention, les au moins deux plateformes inter-aubes étant adjacentes à une même aube, ledit au moins un joint linéaire d'une plateforme inter-aubes parmi les au moins deux plateformes inter-aubes étant disposé en vis-à-vis dudit au moins un joint linéaire de l'autre plateforme inter-aubes parmi les au moins deux plateformes inter-aubes en amont d'un bord d'attaque et/ou en aval d'un bord de fuite de ladite aube, lesdits joints linéaires coopérant en appui en amont du bord d'attaque et/ou en aval du bord de fuite de ladite aube.Advantageously, at least two inter-blade platforms each comprise at least one linear inter-blade platform joint according to the invention, the at least two inter-blade platforms being adjacent to one and the same blade, said at least one linear joint of one inter-blade platform among the at least two inter-blade platforms being disposed opposite said at least one linear joint of the other inter-blade platform among the at least two inter-blade platforms upstream of an edge driving and / or downstream of a trailing edge of said blade, said linear seals cooperating in support upstream of the leading edge and / or downstream of the trailing edge of said blade.

L'amont et l'aval font référence au sens de l'écoulement de l'air (ou des gaz) le long de l'aube, l'air circulant globalement du bord d'attaque vers le bord de fuite. On comprend que deux plateformes adjacentes qui enserrent une aube comprennent chacune un joint selon l'invention sur leur bord en vis-à-vis de ladite aube. Ces joints s'étendent au-delà du bord d'attaque et du bord de fuite par rapport à l'aube (i.e. les joints sont plus longs que l'aube), et coopèrent directement l'un avec l'autre en appui dans ces zones au-delà du bord d'attaque et du bord de fuite.Upstream and downstream refer to the direction of flow of air (or gases) along the blade, the air flowing generally from the leading edge to the trailing edge. It is understood that two adjacent platforms which enclose a blade each comprise a seal according to the invention on their edge vis-à-vis said blade. These joints extend beyond the leading edge and the trailing edge with respect to the blade (ie the joints are longer than the blade), and cooperate directly with each other in support in these areas beyond the leading edge and the trailing edge.

L'invention concerne par ailleurs un turboréacteur comprenant un rotor selon l'invention.The invention furthermore relates to a turbojet engine comprising a rotor according to the invention.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

L'invention et ses avantages seront mieux compris à la lecture de la description détaillée faite ci-après de différents modes de réalisation de l'invention donnés à titre d'exemples non limitatifs. Cette description fait référence aux planches de dessins annexées, sur lesquelles :

  • la figure 1 représente un turboréacteur selon l'invention,
  • la figure 2 représente une vue partielle d'une section de la soufflante du turboréacteur de la figure 1,
  • la figure 3 représente une vue partielle en perspective du joint selon l'invention au sein de la soufflante du turboréacteur selon l'invention,
  • la figure 4 représente la soufflante de la figure 2 vu selon la flèche IV,
  • la figure 5 représente les joints linéaires de la figure 4 selon la section V,
  • la figure 6 représente les joints linéaires de la figure 4 selon la section VI,
  • la figure 7 représente les joints linéaires de la figure 4 selon la section VII,
  • la figure 8 représente les joints linéaires de la figure 4 selon la section VIII,
  • la figure 9 représente les joints linéaires de la figure 4 selon la section IX, et
  • la figure 10 représente un segment de joint linéaire selon l'invention vu en perspective.
The invention and its advantages will be better understood on reading the detailed description given below of various embodiments of the invention given as non-limiting examples. This description refers to the attached drawing plates, in which:
  • the figure 1 represents a turbojet according to the invention,
  • the figure 2 represents a partial view of a section of the turbojet engine fan of the figure 1 ,
  • the figure 3 represents a partial perspective view of the seal according to the invention within the fan of the turbojet according to the invention,
  • the figure 4 represents the blower of the figure 2 seen according to arrow IV,
  • the figure 5 represents the linear joints of the figure 4 according to section V,
  • the figure 6 represents the linear joints of the figure 4 according to section VI,
  • the figure 7 represents the linear joints of the figure 4 according to section VII,
  • the figure 8 represents the linear joints of the figure 4 according to section VIII,
  • the figure 9 represents the linear joints of the figure 4 according to section IX, and
  • the figure 10 represents a linear joint segment according to the invention seen in perspective.

DESCRIPTION DETAILLEE D'EXEMPLES DE REALISATIONDETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

La figure 1 représente un turboréacteur 100, comprenant une soufflante 80 formant un rotor selon l'invention. Comme représenté sur la figure 2, la soufflante 80 comprend un disque 82, à la périphérie duquel sont montées une pluralité d'aubes 50 et une pluralité de plateforme inter-aubes 40, chaque aube 50 étant intercalée entre deux de plateforme inter-aubes 40. En d'autres termes chaque plateforme 40 est disposée entre une paire d'aubes adjacentes 50. Dans cet exemple, chaque bord 42a et 42b de chaque plateforme 40, respectivement en vis-à-vis du côté de l'intrados 52a et du côté de l'extrados 52b d'une aube 50, est respectivement équipé d'un joint linéaire 10 et d'un joint linéaire 10' selon l'invention. Chaque joint linéaire 10 et 10' présente respectivement une base linéaire 12 et 12' et une lèvre linéaire 14 et 14', une gorge linéaire 16 et 16' étant respectivement formée entre la base 12 et la lèvre 14 et la base 12' et la base 14'. Dans cet exemple, le joint 10 est configuré pour coopérer avec l'aube 50 du côté de l'intrados 52a tandis que le joint 10' est configuré pour coopérer avec l'aube 50 du côté de l'extrados 52b. Chaque aube 50 présente successivement selon la hauteur H un pied 51 et un profil aérodynamique 52. Le pied 51 présente une partie 51a en prise dans le disque 82 et une partie intermédiaire 51b. Le profil aérodynamique 52 présente l'intrados 52a, l'extrados 52b, un bord d'attaque 52c et un bord de fuite 52d (cf. fig.4).The figure 1 represents a turbojet engine 100, comprising a fan 80 forming a rotor according to the invention. As shown on the figure 2 , the blower 80 comprises a disc 82, on the periphery of which are mounted a plurality of blades 50 and a plurality of inter-blade platform 40, each blade 50 being interposed between two inter-blade platform 40. In other words each platform 40 is disposed between a pair of adjacent blades 50. In this example, each edge 42a and 42b of each platform 40, respectively vis-à-vis the side of the lower surface 52a and the side of the upper surface 52b of a blade 50, is respectively equipped with a linear joint 10 and a linear joint 10 'according to the invention. Each linear joint 10 and 10 'respectively has a linear base 12 and 12' and a linear lip 14 and 14 ', a linear groove 16 and 16' being respectively formed between the base 12 and the lip 14 and the base 12 'and the base 14 '. In this example, the seal 10 is configured to cooperate with the blade 50 on the side of the lower surface 52a while the seal 10 'is configured to cooperate with the blade 50 on the side of the upper surface 52b. Each blade 50 successively has, according to the height H, a foot 51 and an airfoil 52. The foot 51 has a portion 51a engaged in the disc 82 and an intermediate portion 51b. The aerodynamic profile 52 has the lower surface 52a, the upper surface 52b, a leading edge 52c and a trailing edge 52d (cf. fig.4 ).

De manière générale, la paroi du côté de l'intrados et la paroi du côté de l'intrados sont sensiblement continues (i.e. ne montre pas de différence notable) entre la partie intermédiaire 51b du pied 51 et le profil aérodynamique 52, de sorte que la paroi du côté de l'intrados et la paroi du côté de l'extrados de l'aube au niveau du pied d'aube sont parfois également appelées intrados et extrados.In general, the wall on the underside side and the wall on the underside side are substantially continuous (ie does not show any noticeable difference) between the intermediate portion 51b of the foot 51 and the airfoil 52, so that the wall on the side of the intrados and the wall on the side of the upper surface of the blade at the root of the blade are sometimes also called intrados and extrados.

Comme représenté sur la figure 3, la lèvre 14 du joint 10 coopère avec le pied 51 de l'aube 50, en dessous du bord d'attaque 52c de l'aube 50, au voisinage dudit bord d'attaque 52c. Bien que non représenté, le joint 10' coopérer également avec le pied 51 de l'aube 50, en dessous du bord d'attaque 52c de l'aube 50, au voisinage dudit bord d'attaque 52c. On notera que la figure 3 est une vue partielle qui ne représente l'aube 50 qu'en partie (une partie de la partie intermédiaire 51a et une partie du profil aérodynamique 52) et qu'une partie de la plateforme 40 et du joint 10.As shown on the figure 3 , the lip 14 of the seal 10 cooperates with the root 51 of the blade 50, below the leading edge 52c of the blade 50, in the vicinity of said leading edge 52c. Although not shown, the seal 10 'also cooperate with the root 51 of the blade 50, below the leading edge 52c of the blade 50, in the vicinity of said leading edge 52c. It will be noted that the figure 3 is a partial view which represents the blade 50 only in part (a part of the intermediate part 51a and a part of the aerodynamic profile 52) and a part of the platform 40 and the seal 10.

La figure 4 est une vue d'une aube 50 et de deux plateformes 40 selon la flèche IV de la figure 2. Les joints 10 et 10' s'étendent depuis l'amont du bord d'attaque 52c de l'aube 50 jusqu'à l'aval du bord de fuite 52d de l'aube 50. Ainsi, chaque joint 10 et 10' présente un segment 10a, 10'a qui s'étend en amont du bord de fuite 52c, un segment 10b, 10'b qui s'étend respectivement en vis-à-vis du côté de l'intrados 52a et du côté de l'extrados 52b de l'aube 50, et un segment 10c, 10'c qui s'étend en aval du bord de fuite 52d de l'aube 50. L'amont et l'aval sont considérés selon la circulation de l'air, représentée par la flèche C, le long de l'aube 50, la flèche C étant orientée de l'amont vers l'aval. Chaque segment de joint s'étend sur une portion longitudinale du joint. La direction longitudinale des joints 10 et 10' est respectivement représentée par un trais discontinu L et L'. Les segments amont 10a et 10'a sont disposés en vis-à-vis l'un de l'autre de sorte que les lèvres 14 et 14' des joints 10 et 10' coopèrent en appuis l'une avec l'autre dans la zone amont de l'aube 50 (cf. fig.5). De même, les segments aval 10c et 10'c sont disposés en vis-à-vis l'un de l'autre de sorte que les lèvres 14 et 14' des joints 10 et 10' coopèrent en appuis l'une avec l'autre dans la zone aval de l'aube 50 (cf. fig.9).The figure 4 is a view of a blade 50 and two platforms 40 according to the arrow IV of the figure 2 . The seals 10 and 10 'extend from upstream of the leading edge 52c of the blade 50 to the downstream of the trailing edge 52d of the blade 50. Thus, each seal 10 and 10' presents a segment 10a, 10'a extending upstream of the trailing edge 52c, a segment 10b, 10'b extending respectively opposite the side of the lower surface 52a and the side of the extrados 52b of the blade 50, and a segment 10c, 10'c which extends downstream of the trailing edge 52d of the blade 50. The upstream and downstream are considered according to the flow of air, represented by the arrow C, along the blade 50, the arrow C being oriented from upstream to downstream. Each segment of seal extends over a longitudinal portion of the seal. The longitudinal direction of the joints 10 and 10 'is respectively represented by a discontinuous line L and L'. The upstream segments 10a and 10'a are arranged facing each other so that the lips 14 and 14 'of the seals 10 and 10' cooperate in support with each other in the upstream zone of the dawn 50 (cf. fig.5 ). Similarly, the downstream segments 10c and 10'c are arranged vis-à-vis one another so that the lips 14 and 14 'of the seals 10 and 10' cooperate in support one with the other in the downstream zone of dawn 50 (cf. fig.9 ).

Dans les zones configurées pour venir au contact du voisinage du bord d'attaque 52c et du bord de fuite 52d, les joints 10 et 10' présentent une rainure linéaire 120 et 122, et 120' et 122' (cf. figures 5, 6, 8 et 9). Ces rainures 120, 122 et 120', 122' s'étendent respectivement selon les directions sensiblement parallèles aux directions longitudinales L et L'. On notera que le long du contour de l'aube 50, les directions longitudinales L et L'sont sensiblement parallèles aux parois de l'aube 50.In the zones configured to come into contact with the vicinity of the leading edge 52c and the trailing edge 52d, the seals 10 and 10 'have a linear groove 120 and 122, and 120' and 122 '(cf. Figures 5, 6, 8 and 9 ). These grooves 120, 122 and 120 ', 122' respectively extend in the directions substantially parallel to the longitudinal directions L and L '. It will be noted that along the contour of the blade 50, the longitudinal directions L and L'are substantially parallel to the walls of the blade 50.

Comme représenté sur les figures 5 et 6, les portions d'extrémité distale linéaires 14a et 14'a comportent une rainure linéaire 120 et 120'. Ces figures 5 et 6 représentent chacune une section de l'ensemble aube et plateformes de la figure 4 au voisinage du bord d'attaque 52c de l'aube 50. Les directions B et B', respectivement sensiblement parallèles aux lèvres 14 et 14', indiquent respectivement la direction de la largeur des lèvres 14 et 14'. Le caractère « distal » de la portion d'extrémité distale est considéré selon ces directions B et B', la portion d'extrémité distale d'une lèvre étant à l'opposé de la base selon la direction de la largeur de la lèvre. La figure 7 représente une section de l'ensemble aube et plateformes de la figure 4 dans une zone distincte du voisinage du bord d'attaque 52c et du bord de fuite 52d de l'aube 50. Dans cette zone distincte du voisinage du bord d'attaque 52c et du bord de fuite 52d, les joints 10 et 10' ne présentent pas de rainure linéaire. De la même manière qu'au voisinage du bord d'attaque 52c, les joints 10 et 10' présentent respectivement une rainure 122 et 122' au voisinage du bord de fuite 52d dans la portion d'extrémité distale 14a de la lèvre 14 et dans la portion d'extrémité distale 14'a de la lèvre 14', comme représenté sur les figure 8 et 9.As shown on Figures 5 and 6 the linear distal end portions 14a and 14'a comprise a linear groove 120 and 120 '. These Figures 5 and 6 each represent a section of the whole dawn and platforms of the figure 4 in the vicinity of the leading edge 52c of the blade 50. The directions B and B 'respectively substantially parallel to the lips 14 and 14' respectively indicate the direction of the width of the lips 14 and 14 '. The "distal" character of the distal end portion is considered in these directions B and B ', the distal end portion of a lip being opposite the base in the direction of the width of the lip. The figure 7 represents a section of the whole dawn and platforms of the figure 4 in a zone distinct from the vicinity of the leading edge 52c and the trailing edge 52d of the blade 50. In this zone, distinct from the vicinity of the leading edge 52c and the trailing edge 52d, the seals 10 and 10 'do not have no linear groove. In the same way that in the vicinity of the leading edge 52c, the seals 10 and 10 'respectively have a groove 122 and 122' in the vicinity of the trailing edge 52d in the distal end portion 14a of the lip 14 and in the distal end portion 14'a of the lip 14 ', as shown in FIGS. figure 8 and 9 .

La section transversale des joints 10 et 10', et plus particulièrement de la base 12 et de la lèvre 14 du joint 10 et de la base 12' et de la lèvre 14' du joint 10', est évolutive le long de la direction longitudinale L et L', comme on peut le constater sur les figures 5 à 9.The cross section of the seals 10 and 10 ', and more particularly of the base 12 and the lip 14 of the seal 10 and the base 12' and the lip 14 'of the seal 10', is progressive along the longitudinal direction L and L ', as can be seen from the Figures 5 to 9 .

La figure 10 représente un segment de joint 10, comprenant des raidisseurs 18. Dans cet exemple chaque raidisseur 18 présente une forme de nervure formée d'un seul tenant avec le joint 10. Selon une variante un raidisseur est formé par une armature disposée dans l'épaisseur de la lèvre, ou encore par une gaine disposée autour de la lèvre. De tels raidisseurs peuvent également être prévus pour le joint 10'.The figure 10 is a seal segment 10, comprising stiffeners 18. In this example each stiffener 18 has a rib shape formed integrally with the seal 10. According to a variant a stiffener is formed by a frame disposed in the thickness of the lip, or by a sheath arranged around the lip. Such stiffeners may also be provided for the seal 10 '.

Les joints 10 et 10' présente respectivement un épaulement 20 et 20' ménagé dans l'épaisseur de la base 12 et 12'. Ainsi, la base 12 et 12' présentent chacune une portion de protection 12a et 12'a recouvrant respectivement le bord 42a et 42b de la plateforme 40. Comme représenté sur les figures 4 à 9, les portions de protection 12a et 12'a sont plus épaisses dans les segments 10a, 10'a, 10c et 10'c (soit en amont du bord d'attaque et en aval du bord de fuite) que dans les segments 10b et 10'b. Ces épaisseurs plus importantes dans ces zones permettent notamment de rigidifier les joints 10 et 10' dans ces zones et évitent que les lèvres ne se retournent (i.e. passent du côté du profil aérodynamique 52 de l'aube).The seals 10 and 10 'respectively have a shoulder 20 and 20' formed in the thickness of the base 12 and 12 '. Thus, the base 12 and 12 'each have a protective portion 12a and 12'a covering respectively the edge 42a and 42b of the platform 40. As shown on the Figures 4 to 9 , the protective portions 12a and 12'a are thicker in the segments 10a, 10'a, 10c and 10'c (either upstream of the leading edge and downstream of the trailing edge) than in the segments 10b and 10'b. These greater thicknesses in these areas make it possible in particular to stiffen the seals 10 and 10 'in these areas and prevent the lips from turning over (ie pass on the side of the aerodynamic profile 52 of the blade).

Le joint 10 et 10' sont préférentiellement en plastique élastomère et fabriqués par moulage.The seal 10 and 10 'are preferably elastomeric plastic and manufactured by molding.

Bien que la présente invention ait été décrite en se référant à des exemples de réalisation spécifiques, il est évident que des modifications et des changements peuvent être effectués sur ces exemples sans sortir de la portée générale de l'invention telle que définie par les revendications. En particulier, des caractéristiques individuelles des différents modes de réalisation illustrés/mentionnés peuvent être combinées dans des modes de réalisation additionnels. Par conséquent, la description et les dessins doivent être considérés dans un sens illustratif plutôt que restrictif.Although the present invention has been described with reference to specific exemplary embodiments, it is obvious that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. In particular, individual features of the various embodiments illustrated / mentioned can be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

Claims (10)

  1. An inter-blade platform linear gasket (10; 10') that presents a length, comprising a linear base (12; 12') adapted to be fastened to the inter-blade platform (40) and a linear lip (14; 14') extending from the linear base (12; 12'), said linear lip (14; 14') presenting a linear distal end portion (14a) configured to contact a pressure side wall (52a) or a suction side wall (52b) of a blade (50), a linear groove (16; 16') being formed between the linear base (12; 12') and the linear lip (14; 14') over at least a fraction of the length of said linear gasket (10; 10'), characterized in that the linear distal end portion (14a; 14'a) presents at least one linear slit (120, 122; 120', 122') extending over at least a fraction of the length of said gasket (10; 10').
  2. An inter-blade platform linear gasket (10; 10') according to claim 1, wherein the at least one linear slit (120, 122; 120'; 122') is formed in a lip segment (10a, 10c; 10'a, 10'c) configured to contact the blade (50) in the vicinity of a leading edge (52a) of the blade and/or in the vicinity of a trailing edge (52d) of the blade.
  3. An inter-blade platform linear gasket (10; 10') according to claim 1 or claim 2, wherein the linear slit (120, 122; 120', 122') extends over the entire length of the linear lip (14; 14').
  4. An inter-blade platform linear gasket (10; 10') according to any one of claims 1 to 3, presenting a cross-section that varies along the length of the gasket (10, 10').
  5. An inter-blade platform linear gasket (10; 10') according to any one of claims 1 to 4, including at least one stiffener (18) of the lip (14).
  6. An inter-blade platform (40) including an inter-blade platform linear gasket (10; 10') according to any one of claims 1 to 5.
  7. A rotor (80) comprising a disk (82) having, mounted at its periphery, a plurality of blades (50) and a plurality of inter-blade platforms (40), an inter-blade platform (40) being arranged between each pair of adjacent blades (50), at least one of the inter-blade platforms (40) including at least one inter-blade platform linear gasket (10; 10') according to any one of claims 1 to 5.
  8. A rotor (80) according to claim 7, wherein the lip of said linear gasket (10; 10') is configured to co-operate with a blade root (51) under a leading edge (52c) of said blade (50), in the vicinity of said leading edge (52c).
  9. A rotor (80) according to claim 7 or claim 8, including at least two inter-blade platforms (40), each having at least one inter-blade platform linear gasket (10; 10') according to any one of claims 1 to 5, the at least two inter-blade platforms (40) being adjacent to a common blade (50), said at least one linear gasket (10) of an inter-blade platform (40) from the at least two inter-blade platforms (40) being arranged facing said at least one linear gasket (10') of the other inter-blade platform (40) from the at least two inter-blade platforms (40) upstream from a leading edge (52c) and/or downstream from a trailing edge (52d) of said blade (50), said linear gaskets (10; 10') co-operating by pressing against each other upstream from the leading edge (52c) and/or downstream from the trailing edge (52d) of said blade (50).
  10. A gas turbine reaction engine (100) including a rotor (80) according to any one of claims 7 to 9.
EP13710460.0A 2012-02-22 2013-02-15 Linear seal of an inter-blade platform, and associated inter-blade platform, rotor and turbojet engine Active EP2817491B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1251611A FR2987086B1 (en) 2012-02-22 2012-02-22 LINEAR JOINT OF PLATFORM INTER-AUBES
PCT/FR2013/050310 WO2013124570A1 (en) 2012-02-22 2013-02-15 Linear seal of an inter-blade platform, and associated inter-blade platform, rotor and turbojet engine

Publications (2)

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EP2817491B1 true EP2817491B1 (en) 2016-07-20

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EP13710460.0A Active EP2817491B1 (en) 2012-02-22 2013-02-15 Linear seal of an inter-blade platform, and associated inter-blade platform, rotor and turbojet engine

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US (1) US9869323B2 (en)
EP (1) EP2817491B1 (en)
JP (1) JP6199319B2 (en)
CN (1) CN104145087B (en)
BR (1) BR112014020359B1 (en)
CA (1) CA2864536C (en)
FR (1) FR2987086B1 (en)
IN (1) IN2014DN06758A (en)
RU (1) RU2617635C2 (en)
WO (1) WO2013124570A1 (en)

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FR3035676B1 (en) * 2015-04-29 2017-05-12 Snecma DAWN WITH PLATFORMS POSSESSING A STIFFENER
FR3048997B1 (en) * 2016-03-21 2020-03-27 Safran Aircraft Engines BLADE PLATFORM AND AERONAUTICAL TURBOMACHINE BLOWER DISC
FR3053083B1 (en) 2016-06-22 2019-11-01 Safran Aircraft Engines RING OF WHEEL FAIRING IN AUBES
EP3612978A4 (en) * 2017-04-21 2020-06-03 Zenimax Media Inc. Systems and methods for encoder-guided adaptive-quality rendering
EP3438410B1 (en) 2017-08-01 2021-09-29 General Electric Company Sealing system for a rotary machine
US10738630B2 (en) * 2018-02-19 2020-08-11 General Electric Company Platform apparatus for propulsion rotor
US11028714B2 (en) * 2018-07-16 2021-06-08 Raytheon Technologies Corporation Fan platform wedge seal
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FR3097904B1 (en) * 2019-06-26 2021-06-11 Safran Aircraft Engines Inter-vane platform with sacrificial box
FR3099201B1 (en) * 2019-07-25 2021-08-20 Safran Aircraft Engines BLOWER ROTOR WITH IMPROVED SEALING MEANS

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Publication number Publication date
US9869323B2 (en) 2018-01-16
CA2864536A1 (en) 2013-08-29
EP2817491A1 (en) 2014-12-31
IN2014DN06758A (en) 2015-05-22
BR112014020359B1 (en) 2021-10-19
RU2014138113A (en) 2016-04-10
FR2987086B1 (en) 2014-03-21
BR112014020359A2 (en) 2017-06-20
CA2864536C (en) 2019-06-11
JP6199319B2 (en) 2017-09-20
CN104145087A (en) 2014-11-12
RU2617635C2 (en) 2017-04-25
WO2013124570A1 (en) 2013-08-29
CN104145087B (en) 2016-03-02
JP2015510077A (en) 2015-04-02
US20150016960A1 (en) 2015-01-15
FR2987086A1 (en) 2013-08-23

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