(19)
(11)EP 2 816 288 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
04.09.2019 Bulletin 2019/36

(21)Application number: 13169211.3

(22)Date of filing:  24.05.2013
(51)International Patent Classification (IPC): 
F23M 20/00(2014.01)
F23R 3/60(2006.01)
F23R 3/00(2006.01)

(54)

Combustion chamber for a gas turbine with a vibration damper

Dämpfer für Gasturbinenbrennkammer mit einem Schwingungsdämpfer

Chambre de combustion de turbine à gaz avec amortisseur de vibrations


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(43)Date of publication of application:
24.12.2014 Bulletin 2014/52

(73)Proprietor: Ansaldo Energia IP UK Limited
London W1G 9DQ (GB)

(72)Inventors:
  • Benz, Urs
    5073 Gipf-Oberfrick (CH)
  • Noiray, Nicolas
    3006 Bern (CH)

(74)Representative: Bernotti, Andrea et al
Studio Torta S.p.A. Via Viotti, 9
10121 Torino
10121 Torino (IT)


(56)References cited: : 
EP-A2- 1 424 469
US-A- 5 373 695
US-A1- 2012 102 963
WO-A1-2005/059441
US-A- 5 584 447
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical Field



    [0001] The present invention relates to a gas turbine, more particular, to a combustor for a gas turbine comprising a damper for reducing the pulsations.

    Background of the Invention



    [0002] In conventional gas turbines, acoustic oscillation usually occurs in the combustion chamber of the gas turbines during combustion process due to combustion instability and varieties. This acoustic oscillation may evolve into highly pronounced resonance. Such oscillation, which is also known as combustion chamber pulsations, can assume amplitudes and associated pressure fluctuations that subject the combustion chamber itself to severe mechanical loads that my decisively reduce the life of the combustion chamber and, in the worst case, may even lead to destruction of the combustion chamber.

    [0003] Generally, a type of damper known as Helmholtz damper is utilized to damp the pulsations generated in the combustion chamber of the gas turbine. Currently, one of the main difficulties in utilization of such damper is the fact that the space available for these dampers is limited. One possible approach in addressing such situation is to place the damper on the outer side of the combustion chamber. In practice, the thermal expansion of the different layers composing the combustion chamber prevents directly applying such dampers.

    [0004] A damping arrangement for reducing resonant vibrations in a combustion chamber of a gas turbine is disclosed in US2004/0248053A1, wherein the combustion chamber comprises an outer wall-surface part and an inner wall-surface part facing the combustion chamber, gastightly encloses an intermediate space, into which cooling air can be fed for purposes of convective cooling of the combustion chamber wall. At least one third wall-surface part is provided, which, with the outer wall-surface part, encloses a gastight volume. The gastight volume is connected gastightly to the combustion chamber by at least one connecting line. A gasket is welded at an end of the connecting line that is located in the gastight volume, and covers the outer wall surface part to provide gas tightness. With this gasket and connecting lines, the damping arrangement may compensate thermal expansion difference between the outer and inner wall-surface part in one direction.

    [0005] A combustion chamber suitable for a gas turbine engine is provided in US2006/0123791A1, which comprise at least one Helmholtz resonator having a resonator cavity and a resonator neck in flow communication with the chamber interior. The Helmholtz resonator is fixed to an inner casing of the combustion chamber, with the resonator neck penetrating into the interior of the combustion chamber through an opening on the inner wall of the combustion chamber. An annular sealing member is provided around the outer periphery of the neck to provide gas tight seal between the neck and the opening. The neck provides limited relative axial movement of the neck with respect to the combustion chamber so that substantially no load is transferred from the resonator neck to the combustion chamber during engine operation.

    [0006] A combustor for a gas turbine including at least one resonator is disclosed in WO2012/057994A2, which comprises an outer liner and an inner liner. The resonator is coupled to the outer liner. The combustor liner includes a throat extending from the base of the resonator penetrating into the combustion chamber through the inner liner and the outer liner. The combustor liner further includes a grommet assembly that allows for relative thermal expansion between the inner liner and the outer liner proximate the throat in a first direction along the axis of the throat and a second direction perpendicular to the first direction.

    [0007] US 2012/0102963 discloses a combustion chamber according to the preamble of claim 1, wherein a damper is allowed to rotate relative to the walls of the combustion chamber around an axis of a neck tube of the damper.

    [0008] Even with above mentioned development in the pulsation damping field, there exist a large space to improve the compensation effect in eliminating thermal expansion difference.

    Summary of the Invention



    [0009] It is an object of the present invention is to provide a damper for a gas turbine that may compensate relative rotation generated between the combustor chamber and the damper, in particular, the resonator cavity of the damper, due to thermal expansion difference.

    [0010] This is achieved by a combustion chamber as described in claims 1.

    [0011] According to one possible embodiment, the neck tube is air-tightly attached at a first end thereof to a wall of the combustion chamber, the compensation assembly is pivotably connected with a second end of the tube neck, wherein the compensation assembly comprises a bulb portion formed on the second end of the neck tube and a socket portion air-tightly fitted with the bulb portion to provide the relative rotation between the combustion chamber and the resonator cavity.

    [0012] According to another one possible embodiment, the compensation assembly further comprises a first sliding part formed on the socket portion and a second sliding part air-tightly fitted with the first sliding part to provide relative slide along a direction parallel to a longitudinal axis of the neck tube between the first sliding part and the second sliding part.

    [0013] According to another one possible embodiment, the compensation assembly further comprises a third sliding part formed on the second sliding part and a fourth sliding part formed on the inlet of the resonator cavity that is air-tightly fitted with the third sliding part to provide relative slide in a direction traversing the longitudinal axis of the neck tube between the third sliding part and the fourth sliding part.

    [0014] According to another one possible embodiment, the wall of the combustion chamber comprises an outer wall and an inner wall located radially inwards than the outer wall, and the neck tube is air-tightly attached at the first end thereof to the inner wall of the combustion chamber, and passing through an opening on the outer wall with a grommet air-tightly attached to a peripheral of the neck tube in order to cover the opening on the outer wall.

    [0015] According to another one possible embodiment, the third sliding part comprises a protrusion formed thereon where the protrusion is allowed to air-tightly slide against the fourth sliding part.

    [0016] According to another one possible embodiment, the neck tube is air-tightly attached at a first end thereof to the inlet of the resonator cavity, the compensation assembly is pivotably connected with a second end of the tube neck, wherein the compensation assembly comprises a bulb portion formed on the second end of the tube neck and a socket portion air-tightly fitted with the bulb portion to provide the relative rotation between the combustion chamber and the resonator cavity.

    [0017] According to another one possible embodiment, the compensation assembly further comprises a first sliding part formed on the socket portion and a second sliding part air-tightly fitted with the first sliding part to provide relative slide along a direction parallel to a longitudinal axis of the neck tube between the first sliding part and the second sliding part.

    [0018] According to another one possible embodiment, the compensation assembly further comprises a third sliding part formed on the second sliding part and a fourth sliding part formed on the wall of the combustion chamber that is air-tightly fitted with the third sliding part to provide relative slide in a direction traversing the longitudinal axis of the neck tube between the third sliding part and the fourth sliding part.

    [0019] According to another one possible embodiment, the third sliding part comprises a protrusion formed thereon where the protrusion is allowed to air-tightly slide against the fourth sliding part.

    [0020] With the combustion chamber according to the present invention, by way of providing the compensation assembly, it is assured the relative rotation between the combustion chamber and the resonator cavity is compensated, hence operation life is elongated.

    Brief Description of the Drawings



    [0021] The objects, advantages and other features of the present invention will become more apparent upon reading of the following non-restrictive description of preferred embodiments thereof, given for the purpose of exemplification only, with reference to the accompany drawing, through which similar reference numerals may be used to refer to similar elements, and in which:
    Fig. 1
    shows a schematic cross section view of the damper with part of the combustion chamber of a gas turbine according to one embodiment of the present invention, in which some part is cut way for the purpose of clarity;
    Fig. 2
    shows a schematic cross section view of the damper with part of the combustion chamber of a gas turbine according to another embodiment of the present invention, in which some part is cut way for the purpose of clarity.

    Detailed Description of Different Embodiments of the Invention



    [0022] Fig.1 shows a schematic cross section view of a damper 100 with part of the combustion chamber 200 of a gas turbine according to an embodiment of the present invention, in which some part is cut way for the purpose of clarity. The damper 100 comprises a resonator cavity 110 with a box or cylinder shape as delimitated by a peripheral wall 102 and an inlet 104. As shown in Fig.1, the major part of the resonator cavity 110 is cut away as this would not prevent full and complete understanding of the technical solutions of the present invention. Also, only parts of the combustion chamber 200 closely related to the present invention is shown in Fig.1 for clarity and simplicity. The resonator cavity 110 is air tightly attached to a structure 106 of a combustion chamber 200 by fasteners, not shown in Fig.1. In an example implementation of the present invention, the structure 106 of the combustion chamber 200 may be a casing of the combustion chamber 200. Those skilled in the art should appreciate that the structure 106 provides carrier for the resonator cavity 110, and should not be limited to the casing of the combustion chamber as described herein. In addition, the damper 100 comprises a neck tube 120 that is in flow communication with the resonator cavity 110 through a compensation assembly 130 according to the present invention in order to compensate relative movement between the resonator cavity 110 and the combustion chamber 200.

    [0023] According to one example embodiment, the neck tube 120 is air tightly attached at a first end 122 thereof to the wall of the combustion chamber 200. For example, the first end 122 of the neck tube 120 may be welded to the wall of the combustion chamber 200. As one possible implementation that may be applied in a double wall combustion chamber where the combustion chamber 200 comprises an inner wall 202 and an outer wall 204 radially located outward than the inner wall 202, the first end 122 of the neck tube 120 may be air tightly attached to the inner wall 202 of the combustion chamber 200, with the neck tube 120 extending through an opening 206 on the outer wall 204. In this case, a grommet 208 may be air tightly attached, such as welded, to a peripheral of the neck tube 120 in order to cover the gap generated between the neck tube 120 and the opening 206, providing air tightness.

    [0024] As an alternative embodiment, the grommet 208 may be dispensed when the present invention is applied in a single wall combustion chamber.

    [0025] According to one example embodiment of the present invention, the compensation assembly 130 may pivotably connected with the neck tube 120 and is inserted between the resonator cavity 110 and the combustion chamber 200 to permit relative rotation between the combustion chamber 200 and the resonator cavity 110. In this embodiment, the compensation assembly 130 may be pivotably connected with a second end 124 opposite to the first end 122 of the tube neck 120. In particular, the compensation assembly 130 may comprise a bulb portion 126 formed on the second end 124 and a socket portion 132 air-tightly fitted with the bulb portion 126 to provide the relative rotation between the combustion chamber 200 and the resonator cavity 110. During operation of the gas turbine, the relative rotation between the combustion chamber 200 and the resonator cavity 110 due to different thermal expansion may be compensated or absorbed by the compensation assembly 130, so as to prevent potentially structural damage.

    [0026] In addition, the compensation assembly 130 may comprise a first sliding part 134 formed on the socket portion 132 on a opposite side therefrom, and a second sliding part 136 air-tightly fitted with the first sliding part 134 to provide relative slide along a direction parallel to a longitudinal axis of the neck tube 120 between the first sliding part 134 and the second sliding part 136. During operation of the gas turbine, the relative slide between the first sliding part and the second sliding part may compensate the relative movement along the longitudinal axis of the neck tube 120 between the combustion chamber 200 and the resonator cavity 110 due to different thermal expansion.

    [0027] Furthermore, the compensation assembly 130 my comprise a third sliding part 138 formed on the second sliding part 136 opposite to the first sliding part 134 and a fourth sliding part 108 formed on the inlet 104 of the resonator cavity 110 that is air-tightly fitted with the third sliding part 138 to provide relative slide in a direction traversing the longitudinal axis of the neck tube 122 between the third sliding part 138 and the fourth sliding part 108. During operation of the gas turbine, the relative slide between the third sliding part 138 and the fourth sliding part 108 may compensate the relative movement in a direction traversing the longitudinal axis of the neck tube 120 between the combustion chamber 200 and the resonator cavity 110 due to different thermal expansion.

    [0028] As shown in Fig. 1, the fourth sliding part 108 may be provided by an end face of the inlet 104, which may represent one possible solution that may be adopted by those skilled in the art. However, equivalent structures may be utilized as the fourth sliding part 108. For example, when the resonator cavity 110 is attached by means of an intermediate component, such as a plate with opening to adjust the size and dimension of the inlet 104, not shown, to the structure 106 of the combustion chamber 200, the fourth sliding part 108 may be provided by the plate. As another example, even a portion of the structure 106 of the combustion chamber 200 may be used to provide the fourth sliding part 108, provided the structure 106 is specifically shaped to provide a recess below the inlet 104 against which the third sliding part 138 may slide.

    [0029] As one possible implementation, the resonator cavity 110 may be a cylinder shape with a circular inlet 104. In this case, the circular inlet 104 comprises a flange disposed therearound, by which the resonator cavity 110 is attached to a casing of the combustion chamber 200. In this implementation, the bulb portion 126 may be formed around the second end 124 of the neck tube 120 with a pipe shape sized to adapt certain applications. The socket portion 132 and the first sliding part 134 of the compensation assembly 130 may be provided by a ring with certain width and thickness, where the socket portion 132 will be formed as a circular groove on the inner peripheral surface in the ring, and the first sliding part 134 will be the outer peripheral surface of the ring. In this case, Fig.1 may represent a cross section view of the compensation assembly 130. The second sliding part 136 of the compensation assembly 130 may be provided by a sleeve with an inner diameter to air tightly fitted with the outer diameter of the ring in order to provide the relative slide between the ring and the sleeve. Further, the third sliding part 138 may be provided by a circular plate with a protrusion at a peripheral thereof. The circular plate may be integrated with the sleeve. The protrusion of the circular plate may be allowed to air tightly slide against an end face of the flange as the fourth sliding part in order to provide relative slide between the circular plate and the resonator cavity. Those skilled in the art should appreciate that, the above implementation intends to be one example only, and should not be interpreted as any limitation to the scope and application of the present invention.

    [0030] According to another example embodiment, as shown in Fig. 2, a cut-away schematic cross section view of a damper 100 according to the present invention is provided. The damper 100 comprises a resonator cavity 110 with a box or cylinder shape as delimitated by a peripheral wall 102 and an inlet 104. The resonator cavity 110 is air tightly attached to a structure 106 of a combustion chamber 200 by fasteners, not shown in Fig.2. In an example implementation of the present invention, the structure 106 of the combustion chamber 200 may be a casing of the combustion chamber 200. Those skilled in the art should appreciate that the structure 106 provides carrier for the resonator cavity 110, and should not be limited to the casing of the combustion chamber as described herein. In addition, the damper 100 comprises a neck tube 120 that is in flow communication with the resonator cavity 110 through a compensation assembly 130 according to the present invention in order to compensate relative movement between the resonator cavity 110 and the combustion chamber 200. As an embodiment shown in Fig.2, the neck tube 120 is air tightly attached at a first end 122 to the inlet 104 of the resonator cavity 110. For example, the first end 122 of the neck tube 120 is integrated with the inlet 104 of the resonator cavity 110. As another example, the first end 122 of the neck tube 120 may be welded with the inlet 104 of the resonator cavity 110. In this embodiment, the compensation assembly 130 is pivotably connected with a second end 124 of the neck tube 120.

    [0031] According to one example embodiment of the present invention, the compensation assembly 130 may comprises rotation compensation structures. In particular, the compensation assembly 130 may comprise a bulb portion 126 formed on a second end 124 opposite to the first end 122 of the neck tube 120 and a socket portion 132 air-tightly fitted with the bulb portion 126 to provide the relative rotation between the combustion chamber 200 and the resonator cavity 110. During operation of the gas turbine, the relative rotation between the combustion chamber 200 and the resonator cavity 110 due to different thermal expansion may be compensated or absorbed by the compensation assembly 130, so as to prevent potentially structural damage.

    [0032] In addition, the compensation assembly 130 may comprise a first sliding part 134 formed on the socket portion 132 on a opposite side therefrom, and a second sliding part 136 air-tightly fitted with the first sliding part 134 to provide relative slide along a direction parallel to a longitudinal axis of the neck tube 120 between the first sliding part 134 and the second sliding part 136. During operation of the gas turbine, the relative slide between the first sliding part and the second sliding part may compensate the relative movement along the longitudinal axis of the neck tube 120 between the combustion chamber 200 and the resonator cavity 110 due to different thermal expansion.

    [0033] Furthermore, the compensation assembly 130 my comprise a third sliding part 138 formed on the second sliding part 136 opposite to the first sliding part 134 and a fourth sliding part 108 formed on the wall 210 of the combustion chamber 200 that is air-tightly fitted with the third sliding part 138 to provide relative slide in a direction traversing the longitudinal axis of the neck tube 122 between the third sliding part 138 and the fourth sliding part 108. As shown in Fig. 2, the fourth sliding part 108 is provided by a surface of the wall 210 of the combustion chamber 200.

    [0034] It should be noticed that, in particular application where relative rotation between the combustion chamber and the resonator cavity is significant and relative movement between them along the longitudinal axis of the neck tube and along a perpendicular direction traversing the longitudinal axis of the neck tube is negligible, the first and second sliding parts of the compensation assembly may be integrally formed, and the third and fourth sliding parts of the compensation assembly may be integrally formed or fixed by fasteners. In this case, the compensation assembly may only compensate relative rotation between the combustion chamber and the resonator cavity by means of the bulb portion of the neck tube and the socket portion of the compensation assembly.

    [0035] It should also be noticed that, in another applications where relative rotation and relative movement need to be compensated simultaneously, the sliding part pairs, i.e. the first and second sliding part, the third and fourth sliding part may be utilized both or either pair of them, in combination with the bulb portion of the neck tube and the socket portion of the compensation assembly. Those skilled in the art will appreciate proper combinations of the compensation structures to achieve desired rotation and/or movement compensation.

    List of Reference Numerals



    [0036] 
    100
    damper
    102
    peripheral wall
    104
    inlet
    106
    structure
    108
    fourth sliding part
    110
    resonator cavity
    120
    neck tube
    122
    first end
    124
    second end
    126
    bulb portion
    130
    compensation assembly
    132
    socket portion
    134
    first sliding part
    136
    second sliding part
    138
    third sliding part
    200
    combustion chamber
    202
    inner wall
    204
    outer wall
    206
    opening
    208
    grommet
    210
    wall



    Claims

    1. A combustion chamber (200) for a gas turbine, comprising a damper (100) wherein the damper comprises:

    a resonator cavity (110) with an inlet (104) and a neck tube (120) in flow communication with the interior of the combustion chamber and the resonator cavity, and a compensation assembly (130) pivotably connected with the neck tube and is inserted between the resonator cavity and the combustion chamber to permit relative rotation between the combustion chamber and the resonator cavity, wherein the neck tube is air-tightly attached at a first end thereof (122) to one of a wall (202, 204) of the combustion chamber and an inlet of the resonator cavity, wherein further the compensation assembly is pivotably connected with a second end (124) of the neck tube,

    characterized in that, the compensation assembly comprises a bulb portion (126) formed on the second end of the neck tube and a socket portion (132) air-tightly fitted with the bulb portion to provide the relative rotation between the combustion chamber and the resonator cavity.


     
    2. The combustion chamber according to claim 1, characterized in that,
    the wall of the combustion chamber comprises an inner wall (202) and an outer wall (204) radially located outward of the inner wall, and
    the neck tube(120) is air-tightly attached at the first end thereof (122) to the inner wall (202) of the combustion chamber, and extending through an opening on the outer wall (204) with a grommet (208) air-tightly attached to a peripheral of the neck tube in order to cover a gap generated between the neck tube and the opening.
     
    3. A combustion chamber according to any of the preceding claims,
    characterized in that,
    the compensation assembly (130) further comprises a first sliding part (134) formed on the socket portion (132) and a second sliding part (136) air-tightly fitted with the first sliding part to provide relative slide along a direction parallel to a longitudinal axis of the neck tube (120) between the first sliding part and the second sliding part.
     
    4. The combustion chamber according to claim 3, characterized in that,
    the compensation assembly (130) further comprises a third sliding part (138) formed on the second sliding part (136) and a fourth sliding part (108) formed on the inlet of the resonator cavity that is air-tightly fitted with the third sliding part to provide relative slide in a direction traversing the longitudinal axis of the neck tube between the third sliding part and the fourth sliding part.
     
    5. The combustion chamber according to claim 4, characterized in that,
    the third sliding part (138) comprises a protrusion formed thereon where the protrusion is allowed to air-tightly slide against the fourth sliding part.
     


    Ansprüche

    1. Verbrennungskammer (200) für eine Gasturbine, die einen Dämpfer (100) enthält, wobei der Dämpfer Folgendes aufweist:

    einen Resonatorhohlraum (110) mit einem Einlass (104) und einem Halsrohr (120) in Strömungskommunikation mit dem Innenraum der Verbrennungskammer und dem Resonatorhohlraum und eine Kompensationsanordnung (130), die mit dem Halsrohr drehbar verbunden ist und zwischen den Resonatorhohlraum und die Verbrennungskammer eingesetzt ist, um eine relative Drehung zwischen der Verbrennungskammer und dem Resonatorhohlraum zu ermöglichen, wobei das Halsrohr an seinem ersten Ende (122) entweder mit einer Wand (202, 204) der Verbrennungskammer oder mit einem Einlass des Resonatorhohlraums luftdicht verbunden ist, wobei ferner die Kompensationsanordnung mit einem zweiten Ende (124) des Halsrohrs drehbar verbunden ist,

    dadurch gekennzeichnet, dass die Kompensationsanordnung einen Kolbenabschnitt (126), der am zweiten Ende des Halsrohrs ausgebildet ist, und einen Sockelabschnitt (132), der in den Kolbenabschnitt luftdicht eingepasst ist, um die relative Drehung zwischen der Verbrennungskammer und dem Resonatorhohlraum bereitzustellen, umfasst.


     
    2. Verbrennungskammer nach Anspruch 1, dadurch gekennzeichnet, dass
    die Wand der Verbrennungskammer eine innere Wand (202) und eine äußere Wand (204), die sich radial außerhalb der inneren Wand befindet, umfasst und
    das Halsrohr (120) an seinem ersten Ende (122) mit der inneren Wand (202) der Verbrennungskammer luftdicht verbunden ist und durch eine Öffnung in der äußeren Wand (204) verläuft, wobei an einem Umfang des Halsrohrs eine Durchführung (208) luftdicht befestigt ist, um einen Spalt, der zwischen dem Halsrohr und der Öffnung erzeugt wird, abzudecken.
     
    3. Verbrennungskammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
    die Kompensationsanordnung (130) ferner einen ersten Gleitabschnitt (134), der am Sockelabschnitt (132) ausgebildet ist, und einen zweiten Gleitabschnitt (136), der in den ersten Gleitabschnitt luftdicht eingepasst ist, umfasst, um ein relatives Gleiten in einer Richtung parallel zu einer Längsachse des Halsrohrs (120) zwischen dem ersten Gleitabschnitt und dem zweiten Gleitabschnitt zu ermöglichen.
     
    4. Verbrennungskammer nach Anspruch 3, dadurch gekennzeichnet, dass
    die Kompensationsanordnung (130) ferner einen dritten Gleitabschnitt (138), der am zweiten Gleitabschnitt (136) ausgebildet ist, und einen vierten Gleitabschnitt (108), der am Einlass des Resonatorhohlraums ausgebildet ist und in den dritten Gleitabschnitt luftdicht eingepasst ist, umfasst, um ein relatives Gleiten in einer Richtung quer zu der Längsachse des Halsrohrs zwischen dem dritten Gleitabschnitt und dem vierten Gleitabschnitt zu ermöglichen.
     
    5. Verbrennungskammer nach Anspruch 4, dadurch gekennzeichnet, dass
    der dritte Gleitabschnitt (138) einen an ihm ausgebildeten Vorsprung aufweist, wobei der Vorsprung an dem vierten Gleitabschnitt luftdicht gleiten kann.
     


    Revendications

    1. Chambre de combustion (200) d'une turbine à gaz, comprenant un amortisseur (100), où l'amortisseur comprend :

    une cavité de résonateur (110) dotée d'une entrée (104) et d'un tube à collet (120) en communication de flux avec l'intérieur de la chambre de combustion et la cavité de résonateur, et un ensemble de compensation (130) connecté de manière pivotante au tube à collet et qui est inséré entre la cavité de résonateur et la chambre de combustion, afin de permettre une rotation relative entre la chambre de combustion et la cavité de résonateur, où le tube à collet est fixé hermétiquement au niveau d'une première extrémité de celle-ci (122) à l'une d'une paroi (202, 204) de la chambre de combustion et d'une entrée de la cavité de résonateur, où en outre l'ensemble de compensation est connecté de manière pivotante à une seconde extrémité (124) du tube à collet,

    caractérisée en ce que, l'ensemble de compensation comprend une partie de réservoir (126) formée sur la seconde extrémité du tube à collet, et une partie de support (132) ajustée hermétiquement avec la partie de réservoir afin de fournir une rotation relative entre la chambre de combustion et la cavité de résonateur.


     
    2. Chambre de combustion selon la revendication 1, caractérisée en ce que,
    la paroi de la chambre de combustion comprend une paroi intérieure (202) et une paroi extérieure (204) située radialement à l'extérieur de la paroi intérieure, et
    le tube à collet (120) est fixé hermétiquement au niveau d'une première extrémité (122) de celui-ci sur la paroi intérieure (202) de la chambre de combustion, et s'étend à travers une ouverture sur la paroi extérieure (204) avec un canon isolant (208) fixé hermétiquement à un périphérique du tube à collet afin de couvrir un espace généré entre le tube à collet et l'ouverture.
     
    3. Chambre de combustion selon l'une quelconque des revendications précédentes, caractérisée en ce que,
    l'ensemble de compensation (130) comprend en outre une première partie coulissante (134) formée sur la partie de support (132), et une deuxième partie coulissante (136) ajustée hermétiquement avec la première partie coulissante, afin de fournir un coulissement relatif le long d'une direction parallèle à l'axe longitudinal du tube à collet (120) entre la première partie coulissante et la deuxième partie coulissante.
     
    4. Chambre de combustion selon la revendication 3, caractérisée l'en ce que l'ensemble de compensation (130) comprend en outre une troisième partie coulissante (138) formée sur la deuxième partie coulissante (136), et une quatrième partie coulissante (108) formée sur l'entrée de la cavité de résonateur qui est dotée hermétiquement de la troisième partie coulissante afin de fournir un coulissement relatif dans la direction transversale par rapport à l'axe longitudinal du tube à collet entre la troisième partie coulissante et le quatrième partie coulissante.
     
    5. Chambre de combustion selon la revendication 4, caractérisée en ce que la troisième partie coulissante (138) comprend une saillie formée dessus, où la saillie permet un coulissement hermétique contre la quatrième partie coulissante.
     




    Drawing








    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description