EP1803999A1 - Device to attach an augmentor arm to a post-combustion chamber wall and equipment including such a device - Google Patents

Device to attach an augmentor arm to a post-combustion chamber wall and equipment including such a device Download PDF

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Publication number
EP1803999A1
EP1803999A1 EP06077035A EP06077035A EP1803999A1 EP 1803999 A1 EP1803999 A1 EP 1803999A1 EP 06077035 A EP06077035 A EP 06077035A EP 06077035 A EP06077035 A EP 06077035A EP 1803999 A1 EP1803999 A1 EP 1803999A1
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EP
European Patent Office
Prior art keywords
arm
legs
fixing
plate
flanges
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06077035A
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German (de)
French (fr)
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EP1803999B1 (en
Inventor
Stéphane Pierre Guillaume Blanchard
Yann François Jean-Claude Vuillemenot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
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SNECMA SAS
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Publication of EP1803999A1 publication Critical patent/EP1803999A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
    • F23R3/16—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
    • F23R3/18—Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants
    • F23R3/20—Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants incorporating fuel injection means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances

Definitions

  • the present invention relates to the field of turbojet afterburner equipment, and more specifically the attachment of a flame holder arm to an afterburner housing by means of a fixing device and support.
  • FIG. 1 represents a view in axial section of a turbofan engine TR with a double-flow equipment afterburner.
  • the turbojet engine TR conventionally comprises compressor stages CBP, CHP, and turbine stages THP, TBP for generating a primary flow F1 of burnt gases ejected at high speed in a TY nozzle at the rear which ensures the propulsion.
  • Part of the air of the compressor CBP is derived in a secondary circuit F2 and joins the primary stream F1 in a post-combustion chamber CPC at the nozzle TY to provide additional combustion and additional thrust.
  • the PC chamber contains post-combustion equipment that can inject fuel into F1 + F2 flows and provide this additional combustion.
  • the equipment comprises a series of flame arrestor arms 1 extending radially towards the axis of the reactor TR (from an external casing to which they are attached), to which may be added a burner ring fixed on the arms and arranged according to the circumference of the nozzle TR (ring not shown in Figure 1, only its section appears in Figure 2).
  • Figure 2 shows in more detail the arrangement and mounting of a metal flame-holder arm on an outer casing shell according to the prior art.
  • the flame-holder arm may be made in one-piece form of composite material, in particular composite Ceramic Matrix (abbreviated CMC).
  • CMCs have the advantage of withstanding very high temperatures, in particular of the order of 1000.degree. C. to 1500.degree. C., such as those reached by the hot gases ejected into the nozzle and of offering high mechanical strength as well as high rigidity for a low mass.
  • CMC materials offer a higher strength-to-mass ratio than metals, which is particularly sought after and appreciated in aeronautics.
  • CMC materials do not lend themselves to machining operations or to molding of three-dimensional assembly forms. In particular, drilling of fixing holes in narrow flanges exposes the tearing of the CMC material.
  • the arm 1 undergoes lateral forces because of the gyration of the flow in the nozzle which reveals stresses and flexion areas in the legs of the arm.
  • the indented legs have a low resistance and in particular a flexion when exerts a lateral force or a tilting moment (low “moment of inertia” especially when the legs are close together).
  • the object of the invention is to overcome the drawbacks of current solutions and to propose a system for attaching post-combustion equipment, in particular to relieve the stresses experienced by the flame-holder arm during lateral forces caused by gyration. flow in the vein.
  • Another object is to avoid having the arm bear the entire load of the burner ring segments in a place where it is weakened by the notches of the legs.
  • a device for fixing an afterburner equipment on a turbojet casing comprising a flame-holder arm comprising two longitudinal legs, the device comprising a transverse fixing plate on the housing and at least two lateral legs for supporting the legs, the support legs extending longitudinally.
  • the legs extend longitudinally for a length corresponding at least to a major part of the height of the legs of the flame holder arm.
  • the tabs comprise means, in particular holes, for lateral attachment of the legs of the arm.
  • each leg has a thickened base.
  • the base may comprise a flange provided with a fillet on an external lateral surface.
  • the lower surface of each base may form a flat and / or a flat surface capable of being brazed. As a result, the base of each longitudinal leg can be secured to the transverse plate.
  • the plate is provided with fixing means on the housing.
  • the device comprises at least one burner ring support flange.
  • the device comprises a bridge connecting transversely the longitudinal tabs.
  • the bridge comprises at least one orifice for passage and immobilization of a ventilation liner and / or a fuel injection ramp.
  • the plate has edges provided on their inner side, a groove and a projecting flange forming lateral hooks for immobilizing fastening flanges folded at the end of the legs of the arm flame holder.
  • edges of the plate are provided with means for immobilizing the arm flanges.
  • edges comprise threaded longitudinal holes and / or compression screws and further that the device comprises at least one immobilization wedge / compression of an arm attachment flange.
  • the invention also relates to post-combustion equipment comprising a flame holder arm and such a fixing device.
  • the equipment may comprise at least one burner ring segment.
  • the invention further relates to a turbine engine comprising at least one such post-combustion equipment.
  • FIG. 4 shows an attachment plate 20 and two lateral support tabs 30, 30 'which make it possible to form, as illustrated in FIG. 5, a device 40 for attaching a flame holder arm 1 to a casing. according to a first embodiment of the invention.
  • the parts 20, 30 of the fixing device according to the invention are preferably made of metal or metal alloy, in particular based on titanium or nickel.
  • the flame holder arm 1 is in particular a one-piece arm made of a composite material of the CMC (ceramic matrix composite) type as illustrated in FIG. 3 and described in the document FR-A-2,865,502 which will be referred to for further details.
  • CMC ceramic matrix composite
  • the flame holder arm 1 has a flared gutter shape and comprises two lateral walls 3, 4 connected to their top 6 and extending at their bases by two legs 7 and 8 provided with folded flanges 9 and 10 attachment to a housing shell.
  • the gap 11 between the legs 7,8 of the arm is notched, on the one hand, to be able to fold the flanges 9,10 and, on the other hand, to allow passage to a flow of fresh air to the bottom of a burner ring 12 which will be fixed on a metal support secured to the rear of the arm (downstream side, see Figure 2).
  • the two edges at the rear of the arm 1 bear two indentations 13 at the height of the legs 7, 8 to pass through the burner ring and form recesses 13 for a ring support 12.
  • the mounting plate 20 extends in a transverse plane.
  • the support lugs 30 are intended to be secured to the fixing plate 20 as detailed below.
  • the plate 20 is formed of a metal disc provided with fixing means on the housing. These means comprise positioning pins or threaded studs 21,22 which engage in holes 23 provided on the casing C as well as orifices 24,25 for the passage of screws or fixing bolts 26.
  • the plate 20 is fixed on the casing C by tightening nuts on the threaded studs 21-22 and on the fixing screws 26.
  • the plate 20 has a flat surface 27 intended to serve as brazing support for the two lateral lugs 30 for supporting the arm 1 , as detailed later.
  • each tab 30 is formed of a metal plate 31 extending in a direction substantially corresponding to the longitudinal direction of the arm 1 or the radial direction of the housing C, once the device 40 fixed on the casing C.
  • each tab 30 has a flat surface 31 extending longitudinally along a length L corresponding to the height H of a leg 7.8 of the arm, or at least covering a major part of the height H.
  • the width W of the tab 30 preferably also corresponds to a major part of the width I of the leg 7, 8 of the arm 1.
  • FIG. 8 shows, for example, in another embodiment, that the length L of the tabs 30 covers the entire height H of the legs 7.8 of the arm 1 from the level of the folded flanges 9,10 until the birth of the leading edge 5.
  • the base 32 of each lug designed to be pressed against the fixing plate 20 on the casing C, comprises an enlarged base 32 that is sufficiently wide to be firmly brazed on the surface 27 of the plate 20.
  • each tab 30 is thickened and forms an outward protruding flange of the tabs.
  • each tab has at its end a transverse plane surface P extending transversely (substantially perpendicular to the longitudinal direction of the tab or the flame holder arm) and having a sufficiently large surface to be fixed firmly by soldering to the surface. 27 of the mounting plate 20.
  • the outer lateral surface of the flange 32 of each lug 30 includes a fillet 33, that is to say a concave shape having a rounded (or radiated) surface between the flange 32 and the flat portion 31 of the tab 30.
  • this rounded surface 33 conforms to the curvature zone 17 or 18 between the leg 7 or 8 of the arm and the fastening flange 9 or 10 folded at its end, as can be seen in FIGS. 5 and 6.
  • the device can be initially made in one piece, in particular by foundry, the plate being integral from the original side tabs which protrude perpendicularly from the plate (one piece).
  • the tabs 30 and the plate 20 are initially separated.
  • the procedure consists in assembling the support lugs 30, 30 'with the corresponding legs 7, 8 of the flame holder arm 1, then bringing back the arm 1 provided with the support lugs 30 on the plate 20 and to fix, in particular by brazing, the base 32 of the lugs 30 against the plate 20, as illustrated in FIG. 5.
  • This gives a post-combustion equipment comprising a flame holder arm 1 mounted on the support lugs 30, 30 and on the plate 20 of the device 40, ready to be fixed on the casing C.
  • the lateral lugs 30, 30 ' are held pressed against the internal face of the corresponding legs 7, 8 and fastened thereto in particular. by riveting, screwing or other means of assembly or fixing.
  • Each support lug 30 comprises, as illustrated in FIG. 4, fixing holes 34, 35 for fixing the side walls 7, 8 of the arm 1.
  • rivets 36 are engaged through holes in the legs of the CMC arm and through the mounting holes 34,35 in the side tabs 30 of the device 40.
  • the number and the diameter of the holes and rivets 36 is calculated according to the value of the mechanical forces to bear.
  • the second alternative advantageously makes it possible to remedy a problem of variation of the spacing of the legs 7-8 due to manufacturing tolerances of the flame holder arm 1.
  • the arms made of CMC generally have high manufacturing tolerances, such as the The spacing of the legs 7-8 can undergo variations of the order of a millimeter typically. Or the spacing of the legs 7-8 must be perfectly adjusted to the size occupied by the legs 30-30 'to obtain a solid fastening by riveting 36 and that the arm 1 does not undergo stress at rest.
  • each lateral leg 30,30 'of support on the corresponding leg 7,8 of the flame holder arm 1 is planned to fix each lateral leg 30,30 'of support on the corresponding leg 7,8 of the flame holder arm 1, before securing the support legs 30 and 30' positioned longitudinally on the transverse plate 20.
  • This overcomes the manufacturing tolerance problem of the legs 7,8 of the flame holder arm 1.
  • FIG. 6A shows a flame holder arm 1 made of CMC fixed to a casing with the aid of the fixing device 40 according to the invention.
  • the enlarged view 6B shows, schematically, the distribution of the compression stresses C, S and traction T, E in the arm 1 and in the tabs 30 of the fixing device 40, when the arm 1 undergoes a lateral force, in the direction indicated by an arrow F on the view 7A.
  • the lateral lugs 30 thus constitute lateral reinforcements for the legs 7, 8 of the arm 1 which oppose bending or twisting of the arm at its base.
  • the legs 7-8 and the flanges 9-10 of the arm 1 undergo less stress and deformation which reduces the risk of tearing or deterioration.
  • the fixing device 40 advantageously makes it possible to maintain laterally, to support and reinforce the flame holder arm 1 against the lateral forces F and the risks of bending or twisting.
  • Figure 7 illustrates another embodiment of fastener 50 according to the invention, wherein the device 50 further serves burner ring support.
  • the lateral lugs 30, 30 'of the device 50 are extended longitudinally and connected to at least one, here two, support flanges 51, 52 of the burner ring segment.
  • the tabs 30, 30 'and the flanges 51, 52 may be formed in one piece, in particular in the form of a single support piece 50, obtained from a foundry.
  • the support piece 50 is composed, in addition to the two lateral tabs 30-30 'extending in a longitudinal direction, a bridge 53 joining transversely the two legs lateral 30-30 'and transverse flanges 51,52 supporting burner ring segments.
  • FIG. 8 shows that the lateral lugs 30, 30 'extend longitudinally along a length L corresponding to the height H between the level of the fixing flanges 9, 10 at the end of the arm 1 and the level of the ring sector. on the arm (which advantageously allows to relieve the forces suffered by the legs 7-8 of the arm).
  • the device comprises two flanges 51,52 projecting downstream and connected by their upstream edge to the downstream edges of the two longitudinal tabs 30 and 30 '.
  • the two flanges 51 and 52 constituted here by two plates arranged dihedron, form two bearing faces disposed in symbol ⁇ open downstream.
  • the support flanges 51, 52 enable the assembly of one or two burner ring segments.
  • the support flanges 51, 52 may be pierced with fixing holes to assemble the ring segments.
  • Figure 7 also shows that one of the ring support flanges 52 is disposed at the level of the transverse wall of the bridge 53 which joins the two longitudinal tabs.
  • the transverse flange 52 constitutes an extension of the bridge 53 in the downstream half-space.
  • the bridge 53 and the flange 52 are located here at the top of the part 50 (towards the axis of the reactor) and form a transverse connection between the summit ends of the side flaps of the part.
  • the other flange 51 is disposed transversely at an intermediate level between the base 32 and the top 53 of the workpiece.
  • the bridge 53 strengthens the transverse connection of the legs 30-30 'and stiffens the device 50.
  • the bridge 53 forms a transverse wall which advantageously makes it possible to separate the primary flow F1 of hot gases which propagates in the central part of the turbojet and the secondary flow F2 of fresh air which is propagated on the periphery of the turbojet engine.
  • the primary flow is formed by the flue gases from the combustion of the fuel with air in the chambers of combustion of the turbojet and ejected to the output of the turbojet engine.
  • the secondary flow is formed of fresh air, that is to say of unburned air and relatively cold temperature compared to the hot gases of the primary flow.
  • This fresh air can serve precisely as an oxidizer for post-combustion, especially the burner ring and / or the flame holder arms.
  • the primary and secondary streams do not mix.
  • it is necessary to prevent leakage of secondary flow of pressurized fresh air to the vein of the primary flow so as not to reduce the pressure of the fresh air flow and to obtain an optimal supply of a ventilation jacket arranged in the flame holder arm.
  • it should be avoided that the flow of fresh air is polluted by the flue gases.
  • this secondary cool air flow F2 propagates at the periphery of the turbojet engine TR, in particular between a confluence sheet and the outer shell of the casing.
  • the transverse wall formed by the bridge 53 advantageously makes it possible to ensure the continuity of the partitioning of the confluence sheet which separates the peripheral secondary vein in which the flow of fresh air F2 circulates with respect to the main stream into which the F1 flue gas flow.
  • Such a configuration ensures a seal between the vein of the secondary flow F2 at the periphery and the vein of the primary flow F1 in the center.
  • the transverse wall formed by the bridge 53 is disposed at the top portion of the support piece 50 and in the extension of one of the two support flanges 52, more precisely in the extension of the top flange 52 which supports the inner side of the burner ring segments.
  • the burner ring segments are then entirely on the side of the wall of the bridge 53 exposed to the secondary flow of fresh air.
  • the secondary flow of fresh air F2 can thus reach the bottom of the burner ring segments 12 without losing pressure or mixing with flue gas.
  • the flow Secondary air fresh air can achieve without losing pressure at the entrance of a ventilation jacket 56 (see Fig. 6A-6B) which is engaged and fixed at an orifice 54 arranged in the bridge.
  • This first orifice 54 serves to engage and secure the tubular ventilation jacket 56 which is inserted into the bottom of the flame-holder arm 1 in the form of a gutter.
  • the ventilation jacket 56 makes it possible to bring the flow of fresh cooling air to the bottom of the flame holder arm 1, this air flow also serving as an oxidizer for the afterburner.
  • Figure 7 also shows that the wall of the bridge 53 can be pierced with another orifice 55 to accommodate another element of the afterburner equipment.
  • This second orifice 55 serves for the passage and the maintenance in place of a ramp 57 of fuel injection inside the flame holder arm 1 (see FIG. 6B ).
  • the ramp 57 injects fuel jets, laterally, along the arm 1.
  • Such a support piece 50 may, from the outset, be integral with a fixing plate 20, as previously described, to form a single-piece fixing device obtained for example by casting a single piece.
  • the device can be made in two separate parts: on the one hand, the support piece 50 as illustrated in Figure 7 and, on the other hand, the mounting plate 20 as previously exposed.
  • the support piece 50 and the plate 20 are joined and secured, in particular by brazing.
  • FIG. 8 shows that, according to an improvement, the flame holder arm 1 can be fixed directly to the plate 20, the plate 20 being provided with means 60, 60 'for immobilizing the fixing flanges 9, 10 at the base of the flame holder arm 1. It is intended to immobilize the two flanges 9,10 in two grooves or two lateral grooves formed in two flanges 61 of the plate 20 and acting as lateral jaws.
  • the plate 20 has two lateral edges 61 projecting perpendicularly from the transverse plate.
  • Each edge 61 protruding longitudinally has on its inner side, a groove 62 arranged under a flanged edge 63 of the inner side of the plate 20, which provides a hook function.
  • the two lateral grooves 62 are dimensioned so that the flanges 9,10 of the flame holder arm 1 slide inside while inserting a compression wedge.
  • the flanges 9, 10 are immobilized in the lateral grooves 62 of the plate 20 by means of clamping screws 64 'which are engaged in threaded holes.
  • the holes are threaded, parallel to the longitudinal axis, in the flanges 63 and open into the corresponding groove 62.
  • the clamping screws 64 ' pass through the flanges 63 in the longitudinal direction to open into the groove 62.
  • the screws 64 press on the compression wedge which clamps the flange 9 or 10 to immobilize it.
  • the compression wedge may be provided with a rounded side to fit the outside of the curvature 17 or 18 of the material between the flange 9 or 10 and the leg 7 or 8 of the flame holder arm 1.
  • the flame holder arm 1 can then be fixed on the device, on the one hand by joining the legs 7 and 8 with the lateral lugs 30, 30 'using fixing means (in particular by riveting or screwing) and on the other hand, by immobilizing the flanges 9 and 10 of the arm 1 in the flanges 60 and 60 'of the plate 20, the latter being secured to the legs 30,30' of the device.
  • the indented legs 7 and 8 of the arm 1 which comprise the areas 17, 18, 19 most exposed to the risk of deterioration, are then structurally reinforced by the metal tabs 30 and 30 '. of the fixing device according to the invention.
  • the lateral forces F applied to the arm 1 are transferred and at least partly taken up S and E by the lateral lugs 30, 30 'of the fixing device and are transmitted directly to the casing C.
  • the legs 7-8 and the flanges 9-10 of the flame holder arm 1 are no longer subject to stresses that may cause their deformation (bending, twisting) or their deterioration under the effect of lateral forces.
  • the zones 17 and 18 of fold or curvature of the flanges 9 and 10 for fixing the arm 1 come to rest against the rounded surfaces 33 arranged on the flanges 32 at the base of the legs 30 and 30 'for supporting the device according to the invention.
  • the outer surface of the curvature area 17,18 of each flange 9,10 may be in contact with the rounded edge of the compression shim.
  • the fixing of the flame holder arm 1 on the casing C by means of the device according to the invention makes it possible to remedy the risks of deterioration of the arm 1 (in particular by bending, twisting, folding or tearing).
  • the flame holder arm 1 can be secured at several connection points with the fixing device 40.
  • fixing 34,35 on each lug 30, may be added the extended surfaces of the immobilizing wedges 60,60 'of the flanges 9,10.
  • the mass and the forces exerted by the segments of the burner ring are no longer supported by the flame holder arm 1, but directly transmitted by the support member 50 and the mounting plate 20 to the casing.
  • the invention makes it possible to have a 40/50 device for fixing a flame-holder arm 1 that is easy to disassemble as to be fixed on the casing C, and makes it possible to form a complete post-combustion equipment which is easily exchangeable.
  • the device 40/50 for fixing the flame holder arm according to the invention thus offers real advantages without significantly increasing the mass of the afterburner equipment.

Abstract

The flame-arrestor arm attachment device (40) has an attachment plate (20) for attachment to a casing (C) and two lateral support brackets (30,30') for supporting legs (7,8). The supporting brackets extended longitudinally over a length corresponding to a major portion of the height of the legs of the flame-arrestor arm (1).

Description

1-Domaine technique et arrière-plan de l'invention1-Technical field and background of the invention

La présente invention concerne le domaine des équipements de post-combustion de turboréacteur, et plus précisément la fixation d'un bras accroche-flammes sur un carter de post-combustion au moyen d'un dispositif de fixation et de support.The present invention relates to the field of turbojet afterburner equipment, and more specifically the attachment of a flame holder arm to an afterburner housing by means of a fixing device and support.

La figure 1 représente une vue en coupe axiale d'un turboréacteur TR à double-flux muni d'un équipement de post-combustion. Le turboréacteur TR comporte classiquement, des étages de compresseur CBP, CHP, et des étages de turbine THP, TBP pour générer un flux primaire F1 de gaz brûlés éjectés à grande vitesse dans une tuyère TY à l'arrière ce qui assure la propulsion. Une partie de l'air du compresseur CBP est dérivée dans un circuit secondaire F2 et rejoint le flux primaire F1 dans une chambre de post-combustion CPC au niveau de la tuyère TY pour assurer une combustion supplémentaire et un surcroît de poussée.FIG. 1 represents a view in axial section of a turbofan engine TR with a double-flow equipment afterburner. The turbojet engine TR conventionally comprises compressor stages CBP, CHP, and turbine stages THP, TBP for generating a primary flow F1 of burnt gases ejected at high speed in a TY nozzle at the rear which ensures the propulsion. Part of the air of the compressor CBP is derived in a secondary circuit F2 and joins the primary stream F1 in a post-combustion chamber CPC at the nozzle TY to provide additional combustion and additional thrust.

La chambre PC contient des équipements de post-combustion qui permettent d'injecter du carburant dans les flux F1+F2 et assurer ce surcroît de combustion. L'équipement comporte une série de bras accroche-flammes 1 s'étendant radialement vers l'axe du réacteur TR (depuis un carter externe auquel ils sont fixés), auquel s'ajoute éventuellement un anneau brûleur fixé sur les bras et disposé suivant la circonférence de la tuyère TR (anneau non représenté sur la figure 1 ; seule sa section apparaît sur la figure 2).The PC chamber contains post-combustion equipment that can inject fuel into F1 + F2 flows and provide this additional combustion. The equipment comprises a series of flame arrestor arms 1 extending radially towards the axis of the reactor TR (from an external casing to which they are attached), to which may be added a burner ring fixed on the arms and arranged according to the circumference of the nozzle TR (ring not shown in Figure 1, only its section appears in Figure 2).

La figure 2 montre de façon plus détaillée la disposition et le montage d'un bras accroche-flammes métallique sur une virole de carter externe selon l'art antérieur.Figure 2 shows in more detail the arrangement and mounting of a metal flame-holder arm on an outer casing shell according to the prior art.

Le bras accroche-flammes peut être réalisé sous forme monobloc en matériau composite, notamment en Composite à Matrice Céramique (abrégé CMC). Les CMC présentent l'intérêt de résister à de très hautes températures, notamment de l'ordre de 1000°C à 1500°C, comme celles atteintes par les gaz brûlants éjectés dans la tuyère et d'offrir une grande résistance mécanique ainsi qu'une grande rigidité pour une faible masse. Les matériaux CMC offrent en particulier un rapport résistance/masse plus élevé que des métaux, ce qui est particulièrement recherché et apprécié en aéronautique.The flame-holder arm may be made in one-piece form of composite material, in particular composite Ceramic Matrix (abbreviated CMC). CMCs have the advantage of withstanding very high temperatures, in particular of the order of 1000.degree. C. to 1500.degree. C., such as those reached by the hot gases ejected into the nozzle and of offering high mechanical strength as well as high rigidity for a low mass. In particular, CMC materials offer a higher strength-to-mass ratio than metals, which is particularly sought after and appreciated in aeronautics.

Cependant la fixation entre un bras 1 en CMC et une pièce métallique, comme le carter ou encore un support 12 d'anneau brûleur (voir fig.2), est problématique.However, the fixing between a CMC arm 1 and a metal part, such as the housing or a burner ring support 12 (see FIG. 2), is problematic.

D'une part, les matériaux CMC ne se prêtent guère à des opérations d'usinage, ni à des moulages de formes d'assemblage tridimensionnelles. En particulier, un perçage de trous de fixation dans des brides étroites expose à des risques de déchirure du matériau CMC.On the one hand, CMC materials do not lend themselves to machining operations or to molding of three-dimensional assembly forms. In particular, drilling of fixing holes in narrow flanges exposes the tearing of the CMC material.

D'autre part, le bras 1 subit des efforts latéraux à cause de la giration du flux dans la tuyère ce qui fait apparaître des contraintes et des zones de flexion dans les jambes du bras. Les jambes échancrées présentent une faible résistance et notamment à une flexion lorsque s'exerce une force latérale ou un moment de basculement (faible "moment d'inertie" en particulier lorsque les jambes sont rapprochées).On the other hand, the arm 1 undergoes lateral forces because of the gyration of the flow in the nozzle which reveals stresses and flexion areas in the legs of the arm. The indented legs have a low resistance and in particular a flexion when exerts a lateral force or a tilting moment (low "moment of inertia" especially when the legs are close together).

A la suite de tels efforts latéraux, les lignes de pliure entre les jambes et les brides de fixation du bras subissent des effets de pliage et de dépliage. Ces efforts peuvent provoquer une détérioration du bras, notamment une déchirure le long d'une ligne de pliure.As a result of such lateral forces, the fold lines between the legs and the attachment flanges of the arm undergo bending and unfolding effects. These efforts can cause a deterioration of the arm, including a tear along a fold line.

Le but de l'invention est de pallier les inconvénients des solutions actuelles et de proposer un système de fixation d'un équipement de post-combustion permettant notamment de soulager les contraintes subies par le bras accroche-flammes lors des efforts latéraux provoqués par la giration du flux dans la veine.The object of the invention is to overcome the drawbacks of current solutions and to propose a system for attaching post-combustion equipment, in particular to relieve the stresses experienced by the flame-holder arm during lateral forces caused by gyration. flow in the vein.

Un autre but est d'éviter de faire supporter au bras toute la charge des segments d'anneau brûleur à un endroit où il est fragilisé par les échancrures des jambes.Another object is to avoid having the arm bear the entire load of the burner ring segments in a place where it is weakened by the notches of the legs.

2-Exposé sommaire de l'invention2-Summary of the invention

A cet effet, il est prévu, selon l'invention, de réaliser un dispositif de fixation d'un équipement de post-combustion sur un carter de turboréacteur, l'équipement comprenant un bras accroche-flammes comportant deux jambes longitudinales, le dispositif comprenant une platine transversale de fixation sur le carter et au moins deux pattes latérales de support des jambes, les pattes de support s'étendant longitudinalement.For this purpose, it is provided, according to the invention, to provide a device for fixing an afterburner equipment on a turbojet casing, the equipment comprising a flame-holder arm comprising two longitudinal legs, the device comprising a transverse fixing plate on the housing and at least two lateral legs for supporting the legs, the support legs extending longitudinally.

Il est prévu que les pattes s'étendent longitudinalement sur une longueur correspondant au moins à une majeure partie de la hauteur des jambes du bras accroche-flammes.It is expected that the legs extend longitudinally for a length corresponding at least to a major part of the height of the legs of the flame holder arm.

Avantageusement, les pattes comportent des moyens, notamment des trous, de fixation latérale des jambes du bras.Advantageously, the tabs comprise means, in particular holes, for lateral attachment of the legs of the arm.

Il est prévu que chaque patte comporte une embase épaissie. L'embase peut comporter un rebord muni d'un congé sur une surface latérale externe. La surface inférieure de chaque embase peut former un méplat et/ou une surface plane apte à être brasée. Par suite, la base de chaque patte longitudinale peut être solidarisée sur la platine transversale.It is expected that each leg has a thickened base. The base may comprise a flange provided with a fillet on an external lateral surface. The lower surface of each base may form a flat and / or a flat surface capable of being brazed. As a result, the base of each longitudinal leg can be secured to the transverse plate.

Il est prévu que la platine est munie de moyens de fixation sur le carter.It is expected that the plate is provided with fixing means on the housing.

Selon une caractéristique avantageuse, le dispositif comporte au moins une bride de support d'anneau brûleur.According to an advantageous characteristic, the device comprises at least one burner ring support flange.

Selon une autre caractéristique avantageuse, le dispositif comporte un pontet reliant transversalement les pattes longitudinales.According to another advantageous characteristic, the device comprises a bridge connecting transversely the longitudinal tabs.

De façon avantageuse, le pontet comporte au moins un orifice de passage et d'immobilisation d'une chemise de ventilation et/ou d'une rampe d'injection de carburant.Advantageously, the bridge comprises at least one orifice for passage and immobilization of a ventilation liner and / or a fuel injection ramp.

Selon un perfectionnement avantageux, il est prévu que la platine comporte des bords munis, de leur côté intérieur, d'une gorge et d'un rebord saillant formant des crochets latéraux pour immobiliser des brides de fixation rabattues à l'extrémité des jambes du bras accroche-flammes.According to an advantageous improvement, it is expected that the plate has edges provided on their inner side, a groove and a projecting flange forming lateral hooks for immobilizing fastening flanges folded at the end of the legs of the arm flame holder.

De plus, il est prévu que les bords de la platine sont munis de moyens d'immobilisation des brides du bras.In addition, it is expected that the edges of the plate are provided with means for immobilizing the arm flanges.

Par exemple, on peut prévoir que les bords comportent des trous longitudinaux filetés et/ou des vis de compression et en outre que le dispositif comporte au moins une cale d'immobilisation/compression d'une bride de fixation du bras.For example, it can be provided that the edges comprise threaded longitudinal holes and / or compression screws and further that the device comprises at least one immobilization wedge / compression of an arm attachment flange.

L'invention concerne également un équipement de post-combustion comprenant un bras accroche-flammes et un tel dispositif de fixation. De plus, l'équipement peut comporter au moins un segment d'anneau brûleur.The invention also relates to post-combustion equipment comprising a flame holder arm and such a fixing device. In addition, the equipment may comprise at least one burner ring segment.

L'invention concerne encore un turbomoteur comportant au moins un tel équipement de post-combustion.The invention further relates to a turbine engine comprising at least one such post-combustion equipment.

3-Légende des figures3-Legend of the figures

D'autres particularités ou avantages de l'invention apparaîtront clairement dans la suite de la description, donnée à titre d'exemple non limitatif, en référence aux dessins annexés sur lesquels :

  • la figure 1, précédemment décrite, est une vue en coupe axiale d'un turboréacteur qui montre la disposition de bras accroche-flammes selon l'état de la technique ;
  • la figure 2, précédemment décrite, est une vue détaillée d'un bras accroche-flammes métallique et de sa disposition au niveau d'un carter de post-combustion, selon l'état de la technique ;
  • la figure 3 représente une vue en perspective d'un bras accroche-flammes réalisé en matériau CMC ;
  • la figure 4 représente une vue éclatée des pièces dissociées d'un dispositif de fixation d'un bras accroche-flammes selon un premier mode de réalisation de l'invention ;
  • la figure 5 montre l'assemblage du dispositif de la figure 4 avec un bras accroche-flammes et sa fixation sur un carter, selon l'invention ;
  • les figures 6A et 6B représentent des vues de face d'un bras accroche-flamme et de sa fixation sur un carter à l'aide du dispositif selon l'invention, avec un schéma de répartition des contraintes lors d'un effort latéral sur le bras.
  • la figure 7 représente un autre mode de réalisation de dispositif de fixation d'équipement de post-combustion selon l'invention qui forme à la fois un support pour un bras accroche-flammes et un support pour un anneau brûleur ; et,
  • la figure 8 montre le montage sur un carter du dispositif de fixation d'un équipement de post-combustion selon le mode de réalisation de la figure 7.
Other features or advantages of the invention will become clear in the remainder of the description, given by way of non-limiting example, with reference to the appended drawings in which:
  • FIG. 1, previously described, is an axial sectional view of a turbojet engine showing the flame-holder arm arrangement according to the state of the art;
  • Figure 2, previously described, is a detailed view of a metal flame-holder arm and its arrangement at a post-combustion housing, according to the state of the art;
  • FIG. 3 represents a perspective view of a flame holder arm made of CMC material;
  • FIG. 4 represents an exploded view of the parts separated from a device for fixing a flame-holder arm according to a first embodiment of the invention;
  • Figure 5 shows the assembly of the device of Figure 4 with a flame holder arm and its attachment to a housing, according to the invention;
  • FIGS. 6A and 6B show front views of a flame holder arm and its attachment to a casing using the device according to the invention, with a distribution diagram of the stresses during a lateral force on the arms.
  • FIG. 7 shows another embodiment of post-combustion equipment fixing device according to the invention which forms both a support for a flame-holder arm and a support for a burner ring; and,
  • FIG. 8 shows the mounting on a housing of the device for fixing an afterburner equipment according to the embodiment of FIG. 7.

4-Description détaillée4-Detailed description

Le schéma de la figure 4 montre une platine de fixation 20 et deux pattes 30,30' de support latérales qui permettent de former, comme illustré sur la figure 5, un dispositif de fixation 40 d'un bras accroche-flammes 1 sur un carter selon un premier mode de réalisation de l'invention.The diagram of FIG. 4 shows an attachment plate 20 and two lateral support tabs 30, 30 'which make it possible to form, as illustrated in FIG. 5, a device 40 for attaching a flame holder arm 1 to a casing. according to a first embodiment of the invention.

Les pièces 20, 30 du dispositif de fixation selon l'invention sont réalisées de préférence en métal ou en alliage de métaux, notamment à base de titane ou de nickel.The parts 20, 30 of the fixing device according to the invention are preferably made of metal or metal alloy, in particular based on titanium or nickel.

Le bras accroche-flammes 1 est notamment un bras monobloc réalisé en matériau composite de type CMC (Composite à Matrice Céramique) tel qu'illustré sur la figure 3 et décrit dans le document FR-A-2 865 502 auquel on se référera pour de plus amples détails de réalisation.The flame holder arm 1 is in particular a one-piece arm made of a composite material of the CMC (ceramic matrix composite) type as illustrated in FIG. 3 and described in the document FR-A-2,865,502 which will be referred to for further details.

Comme illustré sur la figure 3, le bras accroche-flammes 1 a une forme de gouttière évasée et comporte deux parois latérales 3,4 reliées à leur sommet 6 et se prolongeant à leur bases par deux jambes 7 et 8 munies de brides rabattues 9 et 10 de fixation sur une virole de carter.As illustrated in FIG. 3, the flame holder arm 1 has a flared gutter shape and comprises two lateral walls 3, 4 connected to their top 6 and extending at their bases by two legs 7 and 8 provided with folded flanges 9 and 10 attachment to a housing shell.

L'intervalle 11 entre les jambes 7,8 du bras est échancré, d'une part, pour pouvoir replier les brides 9,10 et, d'autre part, pour laisser passage à un flux d'air frais vers le fond d'un anneau brûleur 12 qui sera fixé sur un support métallique solidarisé à l'arrière du bras (côté aval, voir figure 2). Les deux bords à l'arrière du bras 1 (à l'opposé du bord d'attaque 5) portent deux échancrures 13 à hauteur des jambes 7,8 pour laisser passage à l'anneau brûleur et former des creux 13 d'emplacement pour un support d'anneau 12.The gap 11 between the legs 7,8 of the arm is notched, on the one hand, to be able to fold the flanges 9,10 and, on the other hand, to allow passage to a flow of fresh air to the bottom of a burner ring 12 which will be fixed on a metal support secured to the rear of the arm (downstream side, see Figure 2). The two edges at the rear of the arm 1 (opposite the leading edge 5) bear two indentations 13 at the height of the legs 7, 8 to pass through the burner ring and form recesses 13 for a ring support 12.

Comme représenté sur la figure 4, la platine de fixation 20 s'étend selon un plan transversal. Les pattes de support 30,30' s'étendent selon une direction longitudinale.As shown in Figure 4, the mounting plate 20 extends in a transverse plane. The support legs 30, 30 'extend in a longitudinal direction.

Les pattes de support 30 sont destinées à être solidaires de la platine de fixation 20 comme détaillé par la suite.The support lugs 30 are intended to be secured to the fixing plate 20 as detailed below.

Dans le mode de réalisation de la figure 4, la platine 20 est formée d'un disque métallique muni de moyens de fixation sur le carter. Ces moyens comprennent des pions de positionnement ou des plots filetés 21,22 qui s'engagent dans des trous 23 aménagés sur le carter C ainsi que des orifices 24,25 de passage de vis ou de boulons de fixation 26. La platine 20 est fixée sur le carter C en serrant des écrous sur les plots filetés 21-22 ainsi que sur les vis de fixation 26. La platine 20 comporte une surface plate 27 destinée à servir de support de brasage pour les deux pattes latérales 30 de support du bras 1, comme détaillé par la suite.In the embodiment of Figure 4, the plate 20 is formed of a metal disc provided with fixing means on the housing. These means comprise positioning pins or threaded studs 21,22 which engage in holes 23 provided on the casing C as well as orifices 24,25 for the passage of screws or fixing bolts 26. The plate 20 is fixed on the casing C by tightening nuts on the threaded studs 21-22 and on the fixing screws 26. The plate 20 has a flat surface 27 intended to serve as brazing support for the two lateral lugs 30 for supporting the arm 1 , as detailed later.

Selon l'exemple de réalisation de la figure 4, chaque patte 30 est formée d'une plaque métallique 31 s'étendant dans une direction qui correspond sensiblement à la direction longitudinale du bras 1 ou à la direction radiale du carter C, une fois le dispositif 40 fixé sur le carter C.According to the embodiment of Figure 4, each tab 30 is formed of a metal plate 31 extending in a direction substantially corresponding to the longitudinal direction of the arm 1 or the radial direction of the housing C, once the device 40 fixed on the casing C.

Les figures 4 et 5 montrent que chaque patte 30 présente une surface plate 31 s'étendant longitudinalement sur une longueur L correspondant à la hauteur H d'une jambe 7,8 du bras, ou du moins couvrant une majeure partie de la hauteur H. La largeur W de la patte 30 correspond de préférence aussi, à une majeure partie de la largeur I de la jambe 7,8 du bras 1. La figure 8 montre par exemple, dans un autre mode de réalisation, que la longueur L des pattes 30 couvre toute la hauteur H des jambes 7,8 du bras 1 depuis le niveau des brides rabattues 9,10 jusqu'à la naissance du bord d'attaque 5.Figures 4 and 5 show that each tab 30 has a flat surface 31 extending longitudinally along a length L corresponding to the height H of a leg 7.8 of the arm, or at least covering a major part of the height H. The width W of the tab 30 preferably also corresponds to a major part of the width I of the leg 7, 8 of the arm 1. FIG. 8 shows, for example, in another embodiment, that the length L of the tabs 30 covers the entire height H of the legs 7.8 of the arm 1 from the level of the folded flanges 9,10 until the birth of the leading edge 5.

De préférence, comme illustré sur la figure 4, la base 32 de chaque patte, destinée à venir s'appliquer contre la platine 20 de fixation sur le carter C, comporte une embase élargie 32 suffisamment large pour être solidement brasée sur la surface 27 de la platine 20.Preferably, as illustrated in FIG. 4, the base 32 of each lug, designed to be pressed against the fixing plate 20 on the casing C, comprises an enlarged base 32 that is sufficiently wide to be firmly brazed on the surface 27 of the plate 20.

La base 32 de chaque patte 30 est épaissie et forme un rebord saillant vers l'extérieur des pattes.The base 32 of each tab 30 is thickened and forms an outward protruding flange of the tabs.

La base 32 de chaque patte présente à son extrémité une face plane P s'étendant transversalement (sensiblement perpendiculaire à la direction longitudinale de la patte ou du bras accroche-flammes) et présentant une surface suffisamment étendue pour être fixée solidement par brasure à la surface 27 de la platine de fixation 20.The base 32 of each tab has at its end a transverse plane surface P extending transversely (substantially perpendicular to the longitudinal direction of the tab or the flame holder arm) and having a sufficiently large surface to be fixed firmly by soldering to the surface. 27 of the mounting plate 20.

Il est prévu avantageusement que la surface latérale externe du rebord 32 de chaque patte 30 comporte un congé 33, c'est-à-dire une forme concave présentant une surface arrondie (ou rayonnée) entre le rebord 32 et la partie plate 31 de la patte 30. De façon avantageuse, cette surface arrondie 33 épouse la zone de courbure 17 ou 18 entre la jambe 7 ou 8 du bras et la bride de fixation 9 ou 10 rabattue à son extrémité, comme visible sur les figures 5 et 6.It is advantageously provided that the outer lateral surface of the flange 32 of each lug 30 includes a fillet 33, that is to say a concave shape having a rounded (or radiated) surface between the flange 32 and the flat portion 31 of the tab 30. Advantageously, this rounded surface 33 conforms to the curvature zone 17 or 18 between the leg 7 or 8 of the arm and the fastening flange 9 or 10 folded at its end, as can be seen in FIGS. 5 and 6.

Selon une alternative (non illustrée), le dispositif peut être réalisé initialement en une seule pièce, notamment par fonderie, la platine étant dès l'origine solidaire des pattes latérales qui font saillie perpendiculairement de la platine (pièce d'un seul tenant).According to an alternative (not shown), the device can be initially made in one piece, in particular by foundry, the plate being integral from the original side tabs which protrude perpendicularly from the plate (one piece).

De préférence, selon la seconde alternative, schématisée sur la figure 4, les pattes 30 et la platine 20 sont initialement séparées.Preferably, according to the second alternative, shown diagrammatically in FIG. 4, the tabs 30 and the plate 20 are initially separated.

Dans la seconde alternative, le mode opératoire consiste à assembler les pattes de support 30, 30' avec les jambes 7,8 correspondantes du bras accroche-flammes 1, puis à rapporter le bras 1 muni des pattes de support 30 sur la platine 20 et à fixer, notamment par brasure, la base 32 des pattes 30 contre la platine 20, comme illustré sur la figure 5. On obtient ainsi un équipement de post-combustion comprenant un bras accroche-flammes 1 monté sur les pattes de support 30,30' et sur la platine 20 du dispositif 40, prêt à être fixé sur le carter C.In the second alternative, the procedure consists in assembling the support lugs 30, 30 'with the corresponding legs 7, 8 of the flame holder arm 1, then bringing back the arm 1 provided with the support lugs 30 on the plate 20 and to fix, in particular by brazing, the base 32 of the lugs 30 against the plate 20, as illustrated in FIG. 5. This gives a post-combustion equipment comprising a flame holder arm 1 mounted on the support lugs 30, 30 and on the plate 20 of the device 40, ready to be fixed on the casing C.

Comme indiqué par la figure 5, les pattes latérales 30, 30' sont maintenues plaquées contre la face interne des jambes correspondantes 7,8 et fixées à celles-ci notamment par rivetage, par vissage ou par l'intermédiaire d'autres moyens d'assemblage ou de fixation.As indicated by FIG. 5, the lateral lugs 30, 30 'are held pressed against the internal face of the corresponding legs 7, 8 and fastened thereto in particular. by riveting, screwing or other means of assembly or fixing.

Chaque patte de support 30 comporte comme illustré sur la figure 4, des trous de fixation 34,35 pour fixer les parois latérales 7,8 du bras 1.Each support lug 30 comprises, as illustrated in FIG. 4, fixing holes 34, 35 for fixing the side walls 7, 8 of the arm 1.

Sur l'exemple de la figure 5, des rivets 36 sont engagés à travers des trous aménagés dans les jambes du bras en CMC et à travers les trous de fixation 34,35 percés dans les pattes latérales 30 du dispositif 40. Le nombre et le diamètre des trous et des rivets 36 est calculé en fonction de la valeur des efforts mécanique à supporter.In the example of Figure 5, rivets 36 are engaged through holes in the legs of the CMC arm and through the mounting holes 34,35 in the side tabs 30 of the device 40. The number and the diameter of the holes and rivets 36 is calculated according to the value of the mechanical forces to bear.

La seconde alternative permet avantageusement de remédier à un problème de variation de l'écartement des jambes 7-8 dû à des tolérances de fabrication du bras accroche-flammes 1. Les bras réalisés en CMC présentent généralement des tolérances de fabrication élevées, telles que l'écartement des jambes 7-8 peut subir des variations atteignant de l'ordre d'un millimètre typiquement. Or l'écartement des jambes 7-8 doit être parfaitement ajusté à la dimension occupée par les pattes 30-30' pour obtenir une solide fixation par rivetage 36 et que le bras 1 ne subisse pas de contrainte au repos.The second alternative advantageously makes it possible to remedy a problem of variation of the spacing of the legs 7-8 due to manufacturing tolerances of the flame holder arm 1. The arms made of CMC generally have high manufacturing tolerances, such as the The spacing of the legs 7-8 can undergo variations of the order of a millimeter typically. Or the spacing of the legs 7-8 must be perfectly adjusted to the size occupied by the legs 30-30 'to obtain a solid fastening by riveting 36 and that the arm 1 does not undergo stress at rest.

Ainsi de façon avantageuse, il est prévu de fixer chaque patte latérale 30,30' de support sur la jambe correspondante 7,8 du bras accroche-flammes 1, avant de solidariser les pattes de support 30 et 30' positionnées longitudinalement sur la platine transversale 20. Ceci permet de remédier au problème de tolérance de fabrication des jambes 7,8 du bras accroche-flammes 1.Advantageously, it is planned to fix each lateral leg 30,30 'of support on the corresponding leg 7,8 of the flame holder arm 1, before securing the support legs 30 and 30' positioned longitudinally on the transverse plate 20. This overcomes the manufacturing tolerance problem of the legs 7,8 of the flame holder arm 1.

La figure 6A montre un bras accroche-flammes 1 en CMC fixé sur un carter à l'aide du dispositif de fixation 40 selon l'invention. La vue agrandie 6B indique, de façon schématique, la répartition des contraintes de compression C,S et de traction T,E dans le bras 1 et dans les pattes 30 du dispositif de fixation 40, lorsque le bras 1 subit un effort latéral, dans le sens indiqué par une flèche F sur la vue 7A.FIG. 6A shows a flame holder arm 1 made of CMC fixed to a casing with the aid of the fixing device 40 according to the invention. The enlarged view 6B shows, schematically, the distribution of the compression stresses C, S and traction T, E in the arm 1 and in the tabs 30 of the fixing device 40, when the arm 1 undergoes a lateral force, in the direction indicated by an arrow F on the view 7A.

Comme suggéré par les flèches représentées sur la vue 6B, lorsque le bras accroche-flammes 1 subit des efforts latéraux, notamment sous l'effet de la giration du flux dans la veine, les contraintes de compression et de traction qui apparaissent à la base du bras 1 sont transférées et supportées, au moins partiellement, dans les pattes latérales 30 du dispositif 40.As suggested by the arrows shown in the view 6B, when the flame holder arm 1 undergoes lateral forces, in particular under the effect of the gyration of the flow in the vein, the compressive and tensile stresses which appear at the base of the 1 are transferred and supported, at least partially, in the lateral lugs 30 of the device 40.

De façon avantageuse, les pattes latérales 30 constituent ainsi des renforts latéraux pour les jambes 7,8 du bras 1 qui s'opposent à une flexion ou à une torsion du bras à sa base. Les jambes 7-8 et les brides 9-10 du bras 1 subissent moins de contraintes et de déformations ce qui réduit les risques de déchirure ou de détérioration.Advantageously, the lateral lugs 30 thus constitute lateral reinforcements for the legs 7, 8 of the arm 1 which oppose bending or twisting of the arm at its base. The legs 7-8 and the flanges 9-10 of the arm 1 undergo less stress and deformation which reduces the risk of tearing or deterioration.

De plus, la zone de pliure ou de courbure 17/18 entre chaque bride 9/10 et la jambe correspondante 7/8 est maintenue par la forme arrondie du congé 33 prévu sur le rebord 32 de la patte 30, ce qui inhibe le risque de détérioration dans cette zone 17/18.In addition, the fold or curvature zone 17/18 between each flange 9/10 and the corresponding leg 7/8 is maintained by the rounded shape of the leave 33 provided on the flange 32 of the flap 30, which inhibits the risk deterioration in this area 17/18.

Ainsi, le dispositif de fixation 40 selon l'invention, permet avantageusement de maintenir latéralement, de soutenir et de renforcer le bras accroche-flammes 1 contre les efforts latéraux F et les risques de flexion ou de torsion.Thus, the fixing device 40 according to the invention advantageously makes it possible to maintain laterally, to support and reinforce the flame holder arm 1 against the lateral forces F and the risks of bending or twisting.

La figure 7 illustre un autre mode de réalisation de dispositif de fixation 50 selon l'invention, dans lequel le dispositif 50 sert en outre de support d'anneau brûleur.Figure 7 illustrates another embodiment of fastener 50 according to the invention, wherein the device 50 further serves burner ring support.

Les pattes latérales 30,30' du dispositif 50 sont prolongées longitudinalement et raccordées à au moins une, ici deux, brides de support 51,52 de segment d'anneau brûleur.The lateral lugs 30, 30 'of the device 50 are extended longitudinally and connected to at least one, here two, support flanges 51, 52 of the burner ring segment.

Selon l'exemple de la figure 7, les pattes 30,30' et les brides 51,52 peuvent être formées d'un seul tenant notamment sous forme d'une pièce de support 50 unique, obtenue de fonderie.According to the example of FIG. 7, the tabs 30, 30 'and the flanges 51, 52 may be formed in one piece, in particular in the form of a single support piece 50, obtained from a foundry.

La pièce de support 50 se compose, outre les deux pattes latérales 30-30' s'étendant dans une direction longitudinale, d'un pontet 53 joignant transversalement les deux pattes latérales 30-30' et des brides transversales 51,52 de support de segments d'anneau brûleur.The support piece 50 is composed, in addition to the two lateral tabs 30-30 'extending in a longitudinal direction, a bridge 53 joining transversely the two legs lateral 30-30 'and transverse flanges 51,52 supporting burner ring segments.

La figure 8 montre que les pattes latérales 30,30' s'étendent longitudinalement sur une longueur L correspondant à la hauteur H séparant le niveau des brides de fixation 9,10 à l'extrémité du bras 1 et le niveau du secteur d'anneau sur le bras (ce qui permet avantageusement de soulager les efforts subis par les jambes 7-8 du bras).FIG. 8 shows that the lateral lugs 30, 30 'extend longitudinally along a length L corresponding to the height H between the level of the fixing flanges 9, 10 at the end of the arm 1 and the level of the ring sector. on the arm (which advantageously allows to relieve the forces suffered by the legs 7-8 of the arm).

Sur l'exemple de réalisation de la figure 7, le dispositif comporte deux brides 51,52 faisant saillie vers l'aval et raccordées par leur bord amont aux bords avals des deux pattes longitudinales 30 et 30'. Les deux brides 51 et 52, constituées ici de deux plaques disposées en dièdre, forment deux faces d'appui disposées en sigle < ouvert vers l'aval. Les brides de support 51,52 permettent l'assemblage d'un ou de deux segments d'anneau brûleur. Les brides de support 51,52 peuvent être percées de trous de fixation pour assembler les segments d'anneau.In the embodiment of Figure 7, the device comprises two flanges 51,52 projecting downstream and connected by their upstream edge to the downstream edges of the two longitudinal tabs 30 and 30 '. The two flanges 51 and 52, constituted here by two plates arranged dihedron, form two bearing faces disposed in symbol <open downstream. The support flanges 51, 52 enable the assembly of one or two burner ring segments. The support flanges 51, 52 may be pierced with fixing holes to assemble the ring segments.

La figure 7 montre encore que l'une des brides 52 de support d'anneau est disposée au niveau de la paroi transversale du pontet 53 qui joint les deux pattes longitudinales. La bride transversale 52 constitue un prolongement du pontet 53 dans le demi-espace aval. Le pontet 53 et la bride 52 sont situées ici au sommet de la pièce 50 (vers l'axe du réacteur) et forment une liaison transversale entre les extrémités sommitales des pattes latérales de la pièce. L'autre bride 51 est disposée transversalement à un niveau intermédiaire entre la base 32 et le sommet 53 de la pièce.Figure 7 also shows that one of the ring support flanges 52 is disposed at the level of the transverse wall of the bridge 53 which joins the two longitudinal tabs. The transverse flange 52 constitutes an extension of the bridge 53 in the downstream half-space. The bridge 53 and the flange 52 are located here at the top of the part 50 (towards the axis of the reactor) and form a transverse connection between the summit ends of the side flaps of the part. The other flange 51 is disposed transversely at an intermediate level between the base 32 and the top 53 of the workpiece.

Le pontet 53 renforce la liaison transversale des pattes 30-30' et rigidifie le dispositif 50.The bridge 53 strengthens the transverse connection of the legs 30-30 'and stiffens the device 50.

De plus, le pontet 53 forme une paroi transversale qui permet avantageusement de séparer le flux primaire F1 de gaz brûlants qui se propage dans la partie centrale du turboréacteur et le flux secondaire F2 d'air frais qui se propage à la périphérie du turboréacteur.In addition, the bridge 53 forms a transverse wall which advantageously makes it possible to separate the primary flow F1 of hot gases which propagates in the central part of the turbojet and the secondary flow F2 of fresh air which is propagated on the periphery of the turbojet engine.

Le flux primaire est formé par les gaz brûlés issus de la combustion du carburant avec de l'air dans les chambres de combustion du turboréacteur et éjectés vers la sortie du turboréacteur. Le flux secondaire est formé d'air frais, c'est-à-dire d'air non-brûlé et à température relativement froide par rapport aux gaz brûlants du flux primaire. Cet air frais peut servir précisément de comburant à la post-combustion, notamment à l'anneau brûleur et/ou aux bras accroche-flammes. Il est préférable que les flux primaire et secondaire ne se mélangent pas. En particulier, il convient d'empêcher des fuites de flux secondaire d'air frais pressurisé vers la veine du flux primaire afin de ne pas diminuer la pression du flux d'air frais et d'obtenir une alimentation optimale d'une chemise de ventilation disposée dans le bras accroche-flammes. Accessoirement, il convient d'éviter que le flux d'air frais soit pollué par les gaz brûlés.The primary flow is formed by the flue gases from the combustion of the fuel with air in the chambers of combustion of the turbojet and ejected to the output of the turbojet engine. The secondary flow is formed of fresh air, that is to say of unburned air and relatively cold temperature compared to the hot gases of the primary flow. This fresh air can serve precisely as an oxidizer for post-combustion, especially the burner ring and / or the flame holder arms. It is preferable that the primary and secondary streams do not mix. In particular, it is necessary to prevent leakage of secondary flow of pressurized fresh air to the vein of the primary flow so as not to reduce the pressure of the fresh air flow and to obtain an optimal supply of a ventilation jacket arranged in the flame holder arm. Incidentally, it should be avoided that the flow of fresh air is polluted by the flue gases.

Comme le montre l'exemple de la figure 2, ce flux secondaire air frais F2 se propage à la périphérie du turboréacteur TR, en particulier entre une tôle de confluence et la virole externe du carter.As shown in the example of FIG. 2, this secondary cool air flow F2 propagates at the periphery of the turbojet engine TR, in particular between a confluence sheet and the outer shell of the casing.

La paroi transversale formée par le pontet 53 permet avantageusement d'assurer la continuité du cloisonnement de la tôle de confluence qui sépare la veine secondaire périphérique dans laquelle circule le flux d'air frais F2 par rapport à la veine principale dans laquelle s'échappe le flux de gaz brûlés F1. Une telle configuration assure une étanchéité entre la veine du flux secondaire F2 à la périphérie et la veine du flux primaire F1 au centre.The transverse wall formed by the bridge 53 advantageously makes it possible to ensure the continuity of the partitioning of the confluence sheet which separates the peripheral secondary vein in which the flow of fresh air F2 circulates with respect to the main stream into which the F1 flue gas flow. Such a configuration ensures a seal between the vein of the secondary flow F2 at the periphery and the vein of the primary flow F1 in the center.

La paroi transversale formée par le pontet 53 est disposée à la partie sommitale de la pièce de support 50 et dans le prolongement d'une des deux brides de support 52, plus précisément dans le prolongement de la bride sommitale 52 qui supporte le côté interne des segments d'anneau brûleur. Les segments d'anneau brûleur se trouvent alors entièrement du côté de la paroi du pontet 53 exposé au flux secondaire d'air frais.The transverse wall formed by the bridge 53 is disposed at the top portion of the support piece 50 and in the extension of one of the two support flanges 52, more precisely in the extension of the top flange 52 which supports the inner side of the burner ring segments. The burner ring segments are then entirely on the side of the wall of the bridge 53 exposed to the secondary flow of fresh air.

Le flux secondaire d'air frais F2 peut ainsi parvenir au fond des segments d'anneau brûleur 12 sans perdre de pression ni se mélanger avec des gaz brûlés. De plus, le flux secondaire d'air frais peut parvenir sans perdre de pression à l'entrée d'une chemise de ventilation 56 (cf. fig. 6A-6B) qui est engagée et fixée au niveau d'un orifice 54 aménagé dans le pontet.The secondary flow of fresh air F2 can thus reach the bottom of the burner ring segments 12 without losing pressure or mixing with flue gas. In addition, the flow Secondary air fresh air can achieve without losing pressure at the entrance of a ventilation jacket 56 (see Fig. 6A-6B) which is engaged and fixed at an orifice 54 arranged in the bridge.

Ce premier orifice 54, de grand diamètre, aménagé en amont du pontet 53, sert à engager et à fixer la chemise de ventilation 56 tubulaire qui s'insère au fond du bras accroche-flammes 1 en forme de gouttière. La chemise de ventilation 56 permet d'amener le flux d'air frais de refroidissement au fond du bras accroche-flammes 1, ce flux d'air servant en outre de comburant à la post-combustion.This first orifice 54, of large diameter, arranged upstream of the bridge 53, serves to engage and secure the tubular ventilation jacket 56 which is inserted into the bottom of the flame-holder arm 1 in the form of a gutter. The ventilation jacket 56 makes it possible to bring the flow of fresh cooling air to the bottom of the flame holder arm 1, this air flow also serving as an oxidizer for the afterburner.

La figure 7 montre encore que la paroi du pontet 53 peut être percée d'un autre orifice 55, pour loger un autre élément de l'équipement de post-combustion.Figure 7 also shows that the wall of the bridge 53 can be pierced with another orifice 55 to accommodate another element of the afterburner equipment.

Ce second orifice 55, de petit diamètre, aménagé dans la partie médiane du pontet 53, sert au passage et au maintien en place d'une rampe 57 d'injection de carburant à l'intérieur du bras accroche-flammes 1 (voir figure 6B). La rampe 57 injecte des jets de carburant, latéralement, le long du bras 1.This second orifice 55, of small diameter, arranged in the median part of the bridge 53, serves for the passage and the maintenance in place of a ramp 57 of fuel injection inside the flame holder arm 1 (see FIG. 6B ). The ramp 57 injects fuel jets, laterally, along the arm 1.

L'ensemble formé par les pattes latérales 30,30' de support du bras accroche-flammes, la ou les brides 51,52 de support de segment(s) d'anneau brûleur, ainsi que la paroi transversale du pontet 53, éventuellement, munie d'orifice(s) 54,55 de logement d'une chemise d'aération 56 et/ou d'une rampe d'injection 57, forme avantageusement une unique pièce de support 50 pour l'ensemble de tous ces éléments d'équipement de post-combustion.The assembly formed by the lateral flanges 30, 30 'supporting the flame holder arm, the flange ring segment (s) supporting flange (s) 51 and 52, as well as the transverse wall of the bridge (53), if appropriate, provided with orifice (s) 54,55 housing an air jacket 56 and / or an injection rail 57, advantageously forms a single support piece 50 for all of these elements of post-combustion equipment.

Une telle pièce de support 50 peut, dès l'origine, être solidaire d'une platine de fixation 20, comme exposé précédemment, pour former un dispositif de fixation d'un seul tenant obtenu par exemple par fonderie d'un pièce unique.Such a support piece 50 may, from the outset, be integral with a fixing plate 20, as previously described, to form a single-piece fixing device obtained for example by casting a single piece.

Alternativement, le dispositif peut être réalisé en deux parties séparées : d'une part, la pièce de support 50 telle qu'illustrée sur la figure 7 et, d'autre part, la platine de fixation 20 telle qu'exposée précédemment. Une fois le bras accroche-flammes 1 rapporté et fixé sur les pattes de support 30,30', la pièce de support 50 et la platine 20 sont réunies et solidarisées, notamment par brasure.Alternatively, the device can be made in two separate parts: on the one hand, the support piece 50 as illustrated in Figure 7 and, on the other hand, the mounting plate 20 as previously exposed. Once the hook-and-flame arm 1 reported and fixed on the support legs 30,30 ', the support piece 50 and the plate 20 are joined and secured, in particular by brazing.

La figure 8 montre qu'en outre, selon un perfectionnement, le bras accroche-flammes 1 peut être fixé directement à la platine 20, la platine 20 étant munie de moyens 60,60' pour immobiliser les brides de fixation 9,10 à la base du bras accroche-flammes 1. Il est prévu d'immobiliser les deux brides 9,10 dans deux rainures ou deux gorges latérales aménagées dans deux rebords 61 de la platine 20 et faisant fonction de mors latéraux.FIG. 8 shows that, according to an improvement, the flame holder arm 1 can be fixed directly to the plate 20, the plate 20 being provided with means 60, 60 'for immobilizing the fixing flanges 9, 10 at the base of the flame holder arm 1. It is intended to immobilize the two flanges 9,10 in two grooves or two lateral grooves formed in two flanges 61 of the plate 20 and acting as lateral jaws.

Dans cette variante de réalisation apparaissant sur la figure 8, la platine 20 comporte deux bordures latérales 61 faisant saillie perpendiculairement de la platine 20 transversale. Chaque bord 61 saillant longitudinalement comporte sur son côté interne, une gorge 62 aménagée sous un rebord rabattu 63 du côté interne de la platine 20, ce qui assure une fonction de crochet.In this variant embodiment shown in FIG. 8, the plate 20 has two lateral edges 61 projecting perpendicularly from the transverse plate. Each edge 61 protruding longitudinally has on its inner side, a groove 62 arranged under a flanged edge 63 of the inner side of the plate 20, which provides a hook function.

Les deux gorges latérales 62 sont dimensionnées de sorte que les brides 9,10 du bras accroche-flammes 1 coulissent à l'intérieur tout en insérant une cale de compression.The two lateral grooves 62 are dimensioned so that the flanges 9,10 of the flame holder arm 1 slide inside while inserting a compression wedge.

Les brides 9,10 sont immobilisées dans les gorges latérales 62 de la platine 20 à l'aide de vis de serrage 64' qui sont engagées dans des trous filetés. Les trous sont taraudés, parallèlement à l'axe longitudinal, dans les rebords 63 et débouchent dans la gorge 62 correspondante. Les vis de serrage 64' traversent les rebords 63 dans la direction longitudinale pour venir déboucher à l'intérieur de la gorge 62. Les vis 64 appuient sur la cale de compression qui serre la bride 9 ou 10 pour l'immobiliser. La cale de compression peut être munie d'un côté arrondi pour épouser l'extérieur de la courbure 17 ou 18 du matériau entre la bride 9 ou 10 et la jambe 7 ou 8 du bras accroche-flammes 1.The flanges 9, 10 are immobilized in the lateral grooves 62 of the plate 20 by means of clamping screws 64 'which are engaged in threaded holes. The holes are threaded, parallel to the longitudinal axis, in the flanges 63 and open into the corresponding groove 62. The clamping screws 64 'pass through the flanges 63 in the longitudinal direction to open into the groove 62. The screws 64 press on the compression wedge which clamps the flange 9 or 10 to immobilize it. The compression wedge may be provided with a rounded side to fit the outside of the curvature 17 or 18 of the material between the flange 9 or 10 and the leg 7 or 8 of the flame holder arm 1.

Lorsque le bras accroche-flammes 1 est assemblé sur la pièce de support comme illustré sur les figures 6A et 6B, les jambes 7 et 8 du bras 1 viennent naturellement s'appliquer contre les parois latérales 31 des pattes de support allongées 30.When the flame holder arm 1 is assembled on the support piece as illustrated in FIGS. 6A and 6B, the legs 7 and 8 of the arm 1 come naturally to apply. against the side walls 31 of the elongated support legs 30.

Le bras accroche-flamme 1 peut alors être fixé sur le dispositif, d'une part en solidarisant les jambes 7 et 8 avec les pattes latérales 30,30' à l'aide de moyens de fixation (notamment par rivetage 36 ou vissage) et, d'autre part, en immobilisant les brides 9 et 10 du bras 1 dans les rebords 60 et 60' de la platine 20, celle-ci étant solidarisée avec les pattes 30,30' du dispositif.The flame holder arm 1 can then be fixed on the device, on the one hand by joining the legs 7 and 8 with the lateral lugs 30, 30 'using fixing means (in particular by riveting or screwing) and on the other hand, by immobilizing the flanges 9 and 10 of the arm 1 in the flanges 60 and 60 'of the plate 20, the latter being secured to the legs 30,30' of the device.

De façon avantageuse, comme le montre la figure 6, les jambes échancrées 7 et 8 du bras 1 qui comportent les zones 17,18,19 les plus exposées à des risques de détérioration, sont alors structurellement renforcées par les pattes métalliques 30 et 30' du dispositif de fixation selon l'invention.Advantageously, as shown in FIG. 6, the indented legs 7 and 8 of the arm 1 which comprise the areas 17, 18, 19 most exposed to the risk of deterioration, are then structurally reinforced by the metal tabs 30 and 30 '. of the fixing device according to the invention.

Ainsi, comme schématisé sur la vue 6B, les efforts latéraux F appliqués sur le bras 1 sont transférés et repris au moins en partie S et E par les pattes latérales 30, 30' du dispositif de fixation et sont transmis directement au carter C.Thus, as shown schematically in the view 6B, the lateral forces F applied to the arm 1 are transferred and at least partly taken up S and E by the lateral lugs 30, 30 'of the fixing device and are transmitted directly to the casing C.

Par suite, les jambes 7-8 et les brides 9-10 du bras accroche-flammes 1 ne sont plus soumises à des contraintes risquant d'amener leur déformation (flexion, torsion) ou leur détérioration sous l'effet des efforts latéraux.As a result, the legs 7-8 and the flanges 9-10 of the flame holder arm 1 are no longer subject to stresses that may cause their deformation (bending, twisting) or their deterioration under the effect of lateral forces.

De façon avantageuse, les zones 17 et 18 de pliure ou de courbure des brides 9 et 10 de fixation du bras 1 viennent reposer contre les surfaces arrondies 33 aménagées sur les rebords 32 à la base des pattes 30 et 30' de support du dispositif selon l'invention. De plus, la surface externe de la zone de courbure 17,18 de chaque bride 9,10 peut être au contact du bord arrondi de la cale de compression.Advantageously, the zones 17 and 18 of fold or curvature of the flanges 9 and 10 for fixing the arm 1 come to rest against the rounded surfaces 33 arranged on the flanges 32 at the base of the legs 30 and 30 'for supporting the device according to the invention. In addition, the outer surface of the curvature area 17,18 of each flange 9,10 may be in contact with the rounded edge of the compression shim.

Ainsi, la fixation du bras accroche-flammes 1 sur le carter C grâce au dispositif selon l'invention, permet de remédier à des risques de détérioration du bras 1 (notamment par flexion, torsion, pliure ou déchirure).Thus, the fixing of the flame holder arm 1 on the casing C by means of the device according to the invention makes it possible to remedy the risks of deterioration of the arm 1 (in particular by bending, twisting, folding or tearing).

Avantageusement, selon l'invention, le bras accroche-flammes 1 peut être solidarisé en plusieurs points de liaison avec le dispositif de fixation 40. Aux nombreux points de fixation 34,35 sur chaque patte 30, peuvent s'ajouter les surfaces étendues des cales d'immobilisation 60,60' des brides 9,10.Advantageously, according to the invention, the flame holder arm 1 can be secured at several connection points with the fixing device 40. fixing 34,35 on each lug 30, may be added the extended surfaces of the immobilizing wedges 60,60 'of the flanges 9,10.

De plus, grâce à l'invention, le masse et les efforts exercés par les segments de l'anneau brûleur ne sont plus supportés par le bras accroche-flammes 1, mais directement transmis par la pièce de support 50 et la platine de fixation 20 au carter.In addition, thanks to the invention, the mass and the forces exerted by the segments of the burner ring are no longer supported by the flame holder arm 1, but directly transmitted by the support member 50 and the mounting plate 20 to the casing.

Globalement, l'invention permet de disposer d'un dispositif 40/50 de fixation de bras accroche-flammes 1 facile à démonter comme à fixer sur le carter C, et permet de former un équipement complet de post-combustion interchangeable aisément.Overall, the invention makes it possible to have a 40/50 device for fixing a flame-holder arm 1 that is easy to disassemble as to be fixed on the casing C, and makes it possible to form a complete post-combustion equipment which is easily exchangeable.

Le dispositif 40/50 de fixation du bras accroche-flammes selon l'invention offre ainsi de réels avantages sans augmenter de manière significative la masse de l'équipement de post-combustion.The device 40/50 for fixing the flame holder arm according to the invention thus offers real advantages without significantly increasing the mass of the afterburner equipment.

Claims (18)

Dispositif de fixation d'un équipement de post-combustion sur un carter (C) de turboréacteur, l'équipement comprenant un bras accroche-flammes (1) comportant deux jambes longitudinales (7,8), caractérisé en ce que le dispositif (40) comprend une platine transversale (20) de fixation sur le carter (C) et au moins deux pattes latérales (30,30') de support desdites jambes (7,8), les pattes de support (30) s'étendant longitudinalement.Device for attaching an afterburner equipment to a turbojet casing (C), the equipment comprising a flame holder arm (1) comprising two longitudinal legs (7, 8), characterized in that the device (40) ) comprises a transverse mounting plate (20) for fixing on the housing (C) and at least two lateral lugs (30, 30 ') for supporting said legs (7, 8), the support lugs (30) extending longitudinally. Dispositif de fixation selon la revendication 1, caractérisé en ce que les pattes (30) s'étendent longitudinalement sur une longueur (L) correspondant au moins à une majeure partie de la hauteur (H) des jambes (7,8) du bras accroche-flammes (1).Fastening device according to claim 1, characterized in that the tabs (30) extend longitudinally along a length (L) corresponding at least to a major part of the height (H) of the legs (7, 8) of the catching arm. flames (1). Dispositif de fixation selon la revendication 1 ou 2, caractérisé en ce que les pattes (30) comportent des moyens, notamment des trous, de fixation (34,35) des jambes (7,8) du bras (1).Fastening device according to claim 1 or 2, characterized in that the lugs (30) comprise means, in particular holes, for fixing (34,35) the legs (7,8) of the arm (1). Dispositif de fixation selon l'une des revendications 1 à 3, caractérisé en ce que chaque patte (30) comporte une embase (32) épaissie.Fastening device according to one of claims 1 to 3, characterized in that each lug (30) comprises a base (32) thickened. Dispositif de fixation selon la revendication 4, caractérisé en ce que l'embase (32) comporte un rebord muni d'un congé (33) sur une surface latérale externe.Fastening device according to claim 4, characterized in that the base (32) comprises a flange provided with a fillet (33) on an external lateral surface. Dispositif de fixation selon la revendication 4 ou 5, caractérisé en ce que la surface inférieure de l'embase (32) de chaque patte (30) forme un méplat (P) et/ou une surface plane (P) apte à être brasée.Fastening device according to claim 4 or 5, characterized in that the lower surface of the base (32) of each lug (30) forms a flat (P) and / or a flat surface (P) capable of being brazed. Dispositif de fixation selon l'une des revendications 1 à 6, caractérisé en ce que la base (32) de chaque patte longitudinale (30) est solidarisée sur la platine transversale (20).Fastening device according to one of claims 1 to 6, characterized in that the base (32) of each longitudinal lug (30) is secured to the transverse plate (20). Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que la platine (20) est munie de moyens de fixation (21,22,26) sur le carter (C).Device according to one of claims 1 to 7, characterized in that the plate (20) is provided with fixing means (21,22,26) on the housing (C). Dispositif selon l'une des revendications 1 à 8, caractérisé en ce qu'il comporte au moins une bride (51,52) de support d'anneau brûleur.Device according to one of Claims 1 to 8, characterized in that it comprises at least one burner ring support flange (51, 52). Dispositif selon l'une des revendications 1 à 9, caractérisé en ce qu'il comporte une paroi transversale (53) reliant transversalement les pattes longitudinales (30,30').Device according to one of claims 1 to 9, characterized in that it comprises a transverse wall (53) transversely connecting the longitudinal tabs (30, 30 '). Dispositif selon la revendication 10, caractérisé en ce que la paroi transversale (53) comporte au moins un orifice (54,55) de passage et d'immobilisation d'une chemise de ventilation (56) et/ou d'une rampe (57) d'injection de carburant.Device according to claim 10, characterized in that the transverse wall (53) comprises at least one orifice (54, 55) for the passage and immobilization of a ventilation jacket (56) and / or a ramp (57). ) of fuel injection. Dispositif selon l'une des revendications 1 à 11, caractérisé en ce que la platine (20) comporte des bords (60,60') munis, de leur côté intérieur, d'une gorge (62) et d'un rebord saillant (63) formant des crochets latéraux pour immobiliser des brides de fixation (9,10) rabattues à l'extrémité des jambes (7,8) du bras accroche-flammes (1).Device according to one of Claims 1 to 11, characterized in that the plate (20) has edges (60, 60 ') provided on their inner side with a groove (62) and a protruding flange ( 63) forming lateral hooks to immobilize fastening flanges (9,10) folded at the end of the legs (7,8) of the flame holder arm (1). Dispositif selon la revendication 12, caractérisé en ce que les bords (60) de la platine (20) sont munis de moyens d'immobilisation (64') des brides (9,10) du bras (1).Device according to claim 12, characterized in that the edges (60) of the plate (20) are provided with immobilization means (64 ') of the flanges (9,10) of the arm (1). Dispositif de fixation selon la revendication 12 ou 13, caractérisé en ce que les bords (60) comportent des trous longitudinaux filetés et/ou des vis de compression (64').Fastening device according to claim 12 or 13, characterized in that the edges (60) comprise threaded longitudinal holes and / or compression screws (64 '). Dispositif selon l'une des revendications 12 à 14, caractérisé en ce qu'il comporte au moins une cale d'immobilisation et/ou de compression d'une bride (9,10) de fixation du bras (1).Device according to one of claims 12 to 14, characterized in that it comprises at least one wedge for immobilizing and / or compressing a clamp (9,10) for fixing the arm (1). Equipement de post-combustion caractérisé en ce qu'il comprend un bras accroche-flammes (1) et un dispositif de fixation (40,50) selon l'une des revendications précédentes.Afterburner equipment characterized in that it comprises a flame holder arm (1) and a fixing device (40,50) according to one of the preceding claims. Equipement de post-combustion selon la revendication précédente caractérisé en ce qu'il comporte en outre au moins un segment d'anneau brûleur.Afterburner equipment according to the preceding claim characterized in that it further comprises at least one burner ring segment. Turbomoteur caractérisé en ce qu'il comporte au moins un équipement de post-combustion selon l'une des revendications 16 à 17.Turbomotor characterized in that it comprises at least one afterburner equipment according to one of claims 16 to 17.
EP06077035.1A 2005-12-05 2006-11-16 Device to attach an augmentor arm to a post-combustion chamber wall and equipment including such a device Active EP1803999B1 (en)

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WO2010023319A3 (en) * 2008-09-01 2010-05-14 Snecma Device for mounting a flame-holder arm on an afterburner casing
RU2508508C2 (en) * 2008-09-01 2014-02-27 Снекма Attachment of flame stabiliser strut at augmenter body
US8769958B2 (en) 2008-09-01 2014-07-08 Snecma Device for attaching a flame-holder arm to an afterburner housing

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Publication number Publication date
EP1803999B1 (en) 2015-11-04
US7886542B2 (en) 2011-02-15
FR2894326B1 (en) 2008-01-11
FR2894326A1 (en) 2007-06-08
US20070125086A1 (en) 2007-06-07

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