EP0904512B1 - Systeme de bouclier thermique, notamment pour elements structuraux d'installations a turbine a gaz - Google Patents

Systeme de bouclier thermique, notamment pour elements structuraux d'installations a turbine a gaz Download PDF

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Publication number
EP0904512B1
EP0904512B1 EP97925907A EP97925907A EP0904512B1 EP 0904512 B1 EP0904512 B1 EP 0904512B1 EP 97925907 A EP97925907 A EP 97925907A EP 97925907 A EP97925907 A EP 97925907A EP 0904512 B1 EP0904512 B1 EP 0904512B1
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EP
European Patent Office
Prior art keywords
heat
arrangement according
heat shield
shield arrangement
bolt
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.)
Expired - Lifetime
Application number
EP97925907A
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German (de)
English (en)
Other versions
EP0904512A1 (fr
Inventor
Günther WALZ
Jens Kleinfeld
Robert Frantzheld
Helmut Neugebauer
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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Publication date
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Publication of EP0904512A1 publication Critical patent/EP0904512A1/fr
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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/04—Supports for linings
    • 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
    • F23R3/007—Continuous combustion chambers using liquid or gaseous fuel constructed mainly of ceramic components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings
    • F27D1/145—Assembling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/05004—Special materials for walls or lining

Definitions

  • the present invention relates to a heat shield assembly to protect a support structure from a hot one Fluid according to the preamble of claim 1.
  • Such a heat shield arrangement is for example from the EP 0 224 817 known.
  • the heat shield assembly is a heat-resistant material has existing inner lining.
  • the inner lining is composed of blanket coverage high-temperature-resistant columns arranged side by side, plate-shaped heat shield elements.
  • the individual heat shield elements are heat moveable on the support structure by means of Anchored bolt.
  • the individual heat shield elements are like a mushroom formed with a hat part and a shaft part, the Hat part a flat or spatial, polygonal plate body is.
  • Such heat shield arrangements to protect a support structure compared to a hot fluid with a heat-resistant material existing inner lining are used in particular Formation of a combustion chamber, in particular for gas turbines, used.
  • a combustion chamber in particular for gas turbines
  • the Inner lining exposed to a relatively high temperature.
  • the individual heat shield elements a heat shield arrangement are also subject a dynamic exposure to vibrations that occur during the combustion process in a combustion chamber of a gas turbine occur.
  • DE 41 14 768 A1 describes a heat shield on a hot gas leading structure having a supporting wall, in particular a flame tube for a gas turbine, consisting of a Variety of stones described.
  • the stones are essentially are arranged side by side and are each by means of at least one associated holder on the Attached wall.
  • Each stone has one facing the supporting wall Cold side and a hot side facing away from the supporting wall and at least two flanks on which the cold side with the Connect hot side.
  • Each associated holder is on the bulkhead attached and contains at least two interacting Brackets that the assigned stone on the Grip the cold side between the flanks. Every holder is there preferably made of sheet metal and each stone from one Ceramics.
  • US Pat. No. 5,333,443 relates to a sealing arrangement for sealing an opening between a combustion chamber brick and one Support structure of a combustion chamber.
  • This combustion chamber stone provides a fireproof lining of part of one Annular combustion chamber.
  • the combustion chamber stone is with a vertically bent edge in an opening of the support structure pushed and fixed with a bolt. Between the combustion chamber stone and an opening remains in the support structure. Through this cooling air, which through holes in the support structure against the inside of the combustion chamber brick is escaped. To prevent loss of cooling air a sealing arrangement is provided.
  • the combustion chamber stone is also complete and homogeneous from a refractory Ceramic is made and is erosion and corrosion resistant.
  • the object of the present invention is to create a improved heat shield arrangement of the generic type, which is effective at elevated temperatures. Further through the heat shield arrangement, the coolant requirement and - reduce consumption. Another object of the invention is to reduce nitrogen oxide emissions from a gas turbine.
  • this object is achieved by a heat shield arrangement with a layered structure with the features of the claim 1 solved.
  • Advantageous further developments and refinements the heat shield arrangement are the subject of the dependent Expectations.
  • the heat shield arrangement according to the invention for protecting a Support structure against a hot fluid with made of heat-resistant Material of existing inner lining stands out characterized in that the heat shield elements from an erosion and Corrosion-resistant, preferably high-temperature resistant material consist. Between each heat shield element and the Support structure is formed thermal insulation.
  • This configuration of the heat shield arrangement makes a layered construction of the inner lining achieved. By this layered structure of the inner lining becomes a Functional separation of individual inner lining tasks reached.
  • the individual heat shield elements in unites all requirements placed on them.
  • the heat shield elements have a protective function against erosion and Corrosion influences of the gas atmosphere.
  • the heat shield element as such does not necessarily have to be thermally insulating Act.
  • the thermal insulation that exists between each Heat shield element and the support structure is formed preferably by a mat made of a fiber material or formed by a refractory ceramic. With refractory ceramics it is, for example, an insulating stone. Thereby, that the thermal insulation by a heat shield element is protected against erosion and corrosion, the thermal Insulation consist of a material that through the Gas atmosphere attacked for example in a combustion chamber could be.
  • the inner lining can, if necessary, by a Coolant to be cooled.
  • the coolant consumption is due the layered design of the inner lining reduced. If the coolant is cooling air, this also reduces the amount of fuel introduced into the combustion chamber Air. This allows the combustion process in the combustion chamber near the ideal air ratio operated, thereby reducing the emission of nitrogen oxides becomes. Due to the heat shield arrangement, a higher turbine inlet temperature reached. An equalization The temperature can also be reached through air filtering become.
  • the heat shield element preferably consists of a structural ceramic.
  • Structural ceramics are preferred around silicon carbide or silicon nitride.
  • a structural ceramic which consists of such a material has the positive Properties that these regarding the corrosion and Erosion influences of the gas atmosphere are insensitive.
  • Structural ceramics are also characterized by high temperature resistance out.
  • Silicon carbide and silicon nitride are the preferred materials used to form the heat shield elements are usable.
  • the heat shield elements however, can also consist of other ceramic materials, provided they have the preferred properties Materials are similar.
  • the heat shield elements are preferred formed essentially plate-shaped. Prefers is an embodiment of the heat shield elements in which at least the edge region facing the hot fluid is curved is trained.
  • these are Heat shield element and the insulating block essentially identical.
  • the heat shield element can also be a ceramic coated metal plate.
  • the heat shield elements are by means of a fastening element, in particular a bolt, anchored to the support structure.
  • the bolt is preferably a made of a ceramic material, preferably of the same Material like the heat shield element, especially made of Silicon carbide or silicon nitride, existing bolt.
  • the Bolt preferably has a head at a free end on.
  • the heat shield element has a through opening through which the bolt extends, the The head of the bolt rests on the heat shield element. By the head of the bolt becomes the heat shield element on the one hand and the head of the bolt seals the Through opening of the heat shield element.
  • P refer the heat shield element has a seat for the head of the Bolt on so that the head sunk in the heat shield element is.
  • the insulating block has preferably a channel through which the Bolt extends through. Different thermal expansions of the bolt, the heat shield element and the insulating block to compensate, the bolt is preferably with play arranged in the channel of the insulating brick.
  • the heat shield element is preferably movable against heat the supporting structure by means of the fastening element, the bolt, anchored.
  • the material that is created is the bolt preferably against a spring force in the axial direction of the Movable bolt. It is preferably anchored on the wall of the supporting structure facing away from the inner lining.
  • the support structure has at least one wall, through which at least one end portion of the bolt extends.
  • a spring element engages on the end section of the bolt on, preferably a compression spring.
  • the Compression spring surrounds the end portion of the bolt.
  • a holding element is arranged on the end section of the bolt, that forms a first abutment for the compression spring.
  • On the wall of the support structure is preferably a spacer arranged, which is a second abutment for the compression spring forms.
  • the holding element is detachable with the end section of the bolt, preferably wedge-shaped, connected.
  • the end section a circumferential groove in which a wedge, preferably a wedge-shaped, circumferential formed on the holding element Projection, intervenes.
  • a cap is preferred connected to the holding element so that the cap, the holding element and the spacer form a chamber, the Cap surrounds the spacer.
  • the cap can be used be connected to the spacer, in which case the Cap surrounds the holding element. In the latter embodiment there is a displacement of the holding element within the cap in the manner of a piston / cylinder arrangement.
  • to Check the compression spring is the cap with the holding element or releasably connected to the spacer, preferably screwed.
  • the assembly of the heat shield arrangement in that an insulating block a heat shield element is arranged. Then the bolt is through the heat shield element and passed the insulating stone through. An end section of the Bolzens protrudes from the insulating stone. This end section is then formed by a in the combustion chamber wall To pass the hole.
  • the spacer one in the channel of the Isolierstein protruding guide tube By this configuration can be a pre-assembly of the insulating block on Follow the guide tube of the spacer.
  • these are preferably by means of a safety bolt connected to the structure.
  • the outer contour of the heat shield element can be different Be geometry.
  • the insulating block preferably with the heat shield element positively connected.
  • the insulating stone preferably has in a surface on a recess in which a Heat shield element correspondingly formed projection intervenes. This causes a shift or twist of the insulating block relative to the heat shield element prevented.
  • the heat shield arrangement it is cooled with a coolant.
  • the Cooling a heat shield arrangement is known per se.
  • a coolant between the heat shield element and the insulating brick passed through, for which purpose at least one coolant channel between the heat shield element and the insulating stone provided is.
  • the coolant channel has an inlet which is connected to a Coolant supply channel is connected, and an outlet, which is open to the surrounding atmosphere.
  • Training the Coolant channel is preferably made in that the heat shield element by far from the thermal insulation below Formation of a gap-shaped coolant channel arranged is.
  • the distance between the heat shield element and the thermal insulation is between 0.3 and 1.5 mm, preferably 1 mm.
  • Training is preferred at which is the distance between 0.3 and 1.5 mm, preferably 1 mm, is.
  • Three spacers are preferably provided, which are arranged on an imaginary circumference, where the center of the imaginary circumference essentially in The center of the heat shield element lies.
  • One Training is the bolt that engages the heat shield element arranged in the center of the heat shield element.
  • the spacers are formed on the heat shield element and / or the insulating block.
  • An embodiment is preferred in which the spacers form an integral part of the heat shield element or the insulating block.
  • the spacers are designed in the form of knobs. For example, they can have the shape of a truncated pyramid.
  • the contact surface of the spacers on which the heat shield element or the insulating block rests is preferably between 9 and 64 mm 2 , in particular 25 mm 2 .
  • the coolant channel can be in the insulating brick and / or in the heat shield element be partially trained.
  • the feeding of a Coolant takes place via the one formed in the insulating block Channel.
  • the cap at least has a coolant supply hole.
  • the coolant supply holes in the cap can cool be controllable.
  • the coolant supply holes each form a throttle for a cooling fluid. To the loss of the coolant To keep it as low as possible, it is proposed that the Chamber essentially sealed airtight to the environment is.
  • Figure 1 shows a segment of a heat shield arrangement for Protection of a support structure 1 against a hot fluid.
  • the Segment forms an inner lining 2a.
  • the inner lining 2a is composed of nationwide, leaving Columns 2b side by side heat shield elements 2.
  • the heat shield element 2 consists of an erosion and corrosion-resistant material. It is preferably a ceramic-coated metal plate.
  • Between the heat shield element 2 and the support structure 1 is an insulating stone 3 arranged.
  • the insulating block 3 consists of a refractory ceramics.
  • connection of the heat shield element 2 with the support structure 1 takes place by means of a fastening element, in particular a bolt 4.
  • the bolt 4 extends through a through opening 5 formed in the heat shield element 2.
  • the bolt 4 has a head 6 at a free end, the rests on the heat shield element 2.
  • the heat shield element 2 has a seat 7 for the head 6 of the bolt 4, so that the head 6 is sunk in the heat shield element 2.
  • the insulating brick 3 has a channel 8 through which the bolt 4 extends through it.
  • the insulating block 3 lies on the support structure 1.
  • the insulating brick 3 has in its the surface facing the heat shield element 2 has a recess 9, in which a corresponding on the heat shield element 2 trained projection 10 engages.
  • the bolt 4 has an end portion 11 which extends through the Wall of the support structure 1 extends through.
  • the Wall of the support structure 1 on a through hole 12.
  • the End portion 11 of the bolt 4 is surrounded by a spring element 13, which is designed in the form of a compression spring.
  • the an abutment of the spring element 13 is by a holding element 14 formed.
  • the holding element 14 has a conical shape expanding bore 17 through which the end portion 11 of the bolt 4 extends through it.
  • the bolt 4 instructs its end section 1 has a circumferential groove 15 into which a Wedge 16 engages.
  • the wedge 16 lies on the conically widening Bore 17 of the spring element. Through the wedge connection the holding element 14 is held on the bolt 4.
  • a cap 18 is screwed to the holding element 14.
  • the Cap 18 has a jacket 19 which faces the wall of the Holding structure 1 extends.
  • the cap 18 is cylindrical educated.
  • the one opposite the holding element 14 Section of the cap 18 encompasses one arranged on the support structure 1 Spacer 20.
  • the spacer 20 has one Recess in which the spring element 13 engages.
  • Of the spacer 20 is also provided with a guide tube 21 provided, which at least partially in the insulating stone 3rd protrudes.
  • the inner cross section of the guide tube 21 is larger than the cross section of the shaft of the bolt 4.
  • the Spring element 13 is preloaded between the spacer 20 and the holding element 14 are arranged. By the spring force of the spring element 13 is one after the holding element 14 externally directed force introduced into the bolt 4. This Force is applied to the heat shield element via the head 6 of the bolt 2 transferred, whereby the heat shield element 2 against the insulating brick 3 is pressed on the wall of the Support structure 1 is applied.
  • the cap 18 is dimensioned so that it is at a distance from the wall the support structure 1 ends, whereby a relative movement of the Cap 18 is permitted in the axial direction of the bolt 4.
  • the securing bolt 22 extends through one in the wall bore 23 formed through the support structure 1.
  • the securing bolt 22 is connected via a screw connection 24 connected to the wall of the support structure 1.
  • a blind hole 25 is formed, into which the securing bolt 22 protrudes.
  • a locking pin 26 extends through this.
  • the locking pin 26 is substantially perpendicular to Longitudinal axis of the locking bolt 22 positioned.
  • a bore 27 is formed for introduction.
  • FIG. 2 shows a bottom view of the one shown in FIG Arrangement. With the section line A-A is the view labeled according to Figure 1.
  • FIG. 3 shows a second exemplary embodiment of a heat shield arrangement shown.
  • the basic structure of this The arrangement corresponds to that shown in FIGS. 1 and 2 Arrangement. In this respect, to avoid repetitions the description of Figures 1 and 2 referenced.
  • the cap 18 Bores 29 which open into the chamber 28. Chamber 28 is by the spacer 20, the cap 18 and the holding element 14 limited. Cooling fluid connection lines can be attached to the bores 29 be connected. A cooling fluid flows through the bores 29 into the chamber 28. From the chamber 28, the cooling fluid flows through the guide tube 21 into the channel 8 formed in the insulating brick 3. Between the Insulating brick 3 and the heat shield element 2 is an outward directed channel 30 formed through which the cooling fluid the channel 8 flows out of the arrangement.
  • the channel 30 is formed in the illustrated embodiment 3.
  • the Channel 30 can also through recesses in the heat shield element 2 and in the insulating brick 3 and only in the heat shield element 2 be formed.
  • FIG 4 shows an embodiment of a heat shield element 2 in longitudinal section.
  • the heat shield element 2 consists, for example, of silicon carbide or silicon nitride. It has spacers 31 on the surface facing an insulating block (not shown).
  • the spacers 31 are essentially truncated pyramids. They have a height of approx. 1 mm and a contact area of approx. 25 mm 2 .
  • the spacers 31 are on an imaginary circumference K educated.
  • the spacers are preferably equidistant arranged to each other.
  • the center of the imaginary circumference K lies essentially in the geometric center of the Heat shield element 2, preferably the center falls of the imaginary circumference K with the geometric center of the heat shield element 2 together.
  • the through opening 5 is formed in the center Z, through a bolt 4, such as that shown in FIGS. 1 and 3 is shown, is extendable.
  • the spacers 31 ensure that the heat shield element 2 arranged at a distance from an insulating block 3 on this is.
  • a cooling fluid then flows between the insulating brick 3 and the heat shield element 2 through, which the Heat shield element 2 is cooled.
  • the spacers 31 also on one Isolierstein 3 can be formed.
  • the height or the Gap size of the cooling channel 30, which by the spacers 31st arises, can be adapted to the thermal task become.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ceramic Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Thermal Insulation (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

L'invention concerne un système de bouclier thermique destiné à protéger une structure porteuse (1) d'un fluide brûlant, comportant un revêtement intérieur (2a) réalisé dans un matériau réfractaire et composé d'éléments de bouclier thermique (2) sous forme de plaques résistant à de hautes températures, ancrées à l'aide de goupilles (4) sur la structure porteuse (1) de manière que la chaleur circule, et disposées de manière adjacente avec des fentes (2b) à recouvrement de surface. Les éléments de bouclier thermique (2) se composent d'un matériau résistant à l'érosion et à la corrosion. Entre chaque élément de bouclier thermique 82) et la structure porteuse (1), il est prévu un bloc isolant (3) en céramique réfractaire.

Claims (42)

  1. Système de bouclier thermique pour protéger d'un fluide chaud une structure portante (1), avec un garnissage intérieur (2a) constitué d'un matériau réfractaire, garnissage qui est constitué d'éléments de bouclier thermique (2), essentiellement en forme de plaque, réfractaires, disposés l'un à côté de l'autre, en pleine surface, en laissant des fentes (2b), et qui, en pouvant se déplacer sous l'effet de la chaleur, sont ancrés à la structure portante (1), chacun avec au moins un élément de fixation (4), les éléments de bouclier thermique (2) étant constitués d'un matériau résistant à l'érosion et à la corrosion, caractérisé en ce qu'un matériau isolant thermique (3) est disposé entre chaque élément de bouclier thermique (2) et la structure portante (1).
  2. Système de bouclier thermique selon la revendication 1, caractérisé en ce que l'élément de bouclier thermique (2) est constitué d'une céramique structurale.
  3. Système de bouclier thermique selon la revendication 2, caractérisé en ce que l'élément de bouclier thermique (2) est constitué de carbure de silicium.
  4. Système de bouclier thermique selon la revendication 2, caractérisé en ce que l'élément de bouclier thermique (2) est constitué de nitrure de silicium.
  5. Système de bouclier thermique selon la revendication 1, caractérisé en ce que l'élément de bouclier thermique (2) est constitué d'une plaque métallique revêtue de céramique au moins sur une face.
  6. Système de bouclier thermique selon l'une des revendications 1 à 5, caractérisé en ce qu'au moins une zone marginale, dirigée vers le fluide chaud, de l'élément de bouclier thermique (2) a une configuration incurvée.
  7. Système de bouclier thermique selon l'une des revendications 1 à 6, caractérisé en ce que l'isolation thermique (3) est formée par un mat en un matériau fibreux.
  8. Système de bouclier thermique selon l'une des revendications 1 à 6, caractérisé en ce que l'isolation thermique (3) est formée d'une céramique réfractaire.
  9. Système de bouclier thermique selon la revendication 8, caractérisé en ce que la céramique réfractaire se présente sous forme de briques isolantes (3).
  10. Système de bouclier thermique selon la revendication 9, caractérisé en ce que l'élément de bouclier thermique (2) et la brique isolante (3) sont essentiellement en coïncidence.
  11. Système de bouclier thermique selon l'une des revendications 1 à 10, caractérisé en ce que le boulon (4) est constitué d'une céramique structurale, de préférence de carbure de silicium ou de nitrure de silicium.
  12. Système de bouclier thermique selon l'une des revendications 1 à 11, caractérisé en ce que l'isolation thermique (3) comporte un canal (8) à travers lequel s'étend le boulon (4).
  13. Système de bouclier thermique selon la revendication 12, caractérisé en ce que le boulon (4) est disposé dans le canal (8) avec un jeu.
  14. Système de bouclier thermique selon l'une des revendications 1 à 13, caractérisé en ce que le boulon (4) comporte une tête (6) en une extrémité libre, et que l'élément de bouclier thermique (2) comporte une ouverture de passage (5), par laquelle passe le boulon (4), et la tête (6) s'appuie sur l'élément de bouclier thermique (2).
  15. Système de bouclier thermique selon la revendication 14, caractérisé en ce que l'élément de bouclier thermique (2) comporte un siège (7) pour la tête (6), de sorte que la tête (6) est noyée dans l'élément de bouclier thermique (2), et se termine de préférence en affleurement avec la surface de l'élément de bouclier thermique.
  16. Système de bouclier thermique selon la revendication 14 ou 15, caractérisé en ce que la tête (6) s'appuie d'une manière essentiellement étanche aux gaz sur l'élément de bouclier thermique (2).
  17. Système de bouclier thermique selon l'une des revendications 1 à 16, caractérisé en ce que le boulon (4) peut se déplacer contre une force élastique dans la direction axiale du boulon (4).
  18. Système de bouclier thermique selon l'une des revendications 1 à 17, caractérisé en ce que la structure portante (1) comporte au moins une paroi à travers laquelle s'étend au moins un segment terminal (11) du boulon (4).
  19. Système de bouclier thermique selon la revendication 18, caractérisé en ce qu'un élément élastique (13) agit sur le segment terminal (11) du boulon (4).
  20. Système de bouclier thermique selon la revendication 19, caractérisé en ce que l'élément élastique (13) est un ressort de compression.
  21. Système de bouclier thermique selon la revendication 20, caractérisé en ce que le ressort de compression (13) entoure le segment terminal (11).
  22. Système de bouclier thermique selon la revendication 19 ou 21, caractérisé en ce qu'un élément d'arrêt (14) est disposé contre le segment terminal (11) et une pièce d'écartement (20) est disposée contre la paroi de la structure portante (1), l'élément d'arrêt (14) formant un premier contre-palier pour l'élément élastique (13), et la pièce d'écartement (20) formant un deuxième contre-palier pour cet élément élastique.
  23. Système de bouclier thermique selon la revendication 22, caractérisé en ce que l'élément d'arrêt (14) est assemblé d'une manière amovible avec le segment terminal (11) du boulon (4).
  24. Système de bouclier thermique selon la revendication 23, caractérisé en ce qu'un assemblage par calage est réalisé entre l'élément d'arrêt (14) et le boulon (4).
  25. Système de bouclier thermique selon la revendication 23 ou 24, caractérisé en ce que le segment terminal (11) comporte une rainure périphérique (15), dans laquelle entre en prise une saillie (16) périphérique, en forme de coin, aménagée sur l'élément d'arrêt (14).
  26. Système de bouclier thermique selon l'une des revendications 22 à 25, caractérisé en ce qu'un capuchon (18) est relié à l'élément d'arrêt (14) ou à la pièce d'écartement (20) de façon que le capuchon (18), l'élément d'arrêt (14) et la pièce d'écartement (20) délimitent une chambre (29), le capuchon (18) entourant l'élément d'arrêt (14) ou la pièce d'écartement (20).
  27. Système de bouclier thermique selon la revendication 26, caractérisé en ce que le capuchon (18) est relié d'une manière amovible, de préférence par vissage, à l'élément d'arrêt (14) ou la pièce d'écartement (20).
  28. Système de bouclier thermique selon l'une des revendications 22 à 27, caractérisé en ce que la pièce d'écartement comporte un tube de guidage (21) qui pénètre dans le canal (8).
  29. Système de bouclier thermique selon l'une des revendications 1 à 28, caractérisé en ce que l'isolation thermique (3), en particulier la brique isolante (3), est assemblée à la structure portante (1) à l'aide d'un boulon de sécurité (22).
  30. Système de bouclier thermique selon l'une des revendications 1 à 29, caractérisé en ce qu'entre l'élément de bouclier thermique (2) et l'isolation thermique (3), en particulier une brique isolante (3), est aménagé au moins un canal de fluide de refroidissement (30), dont l'entrée communique avec un canal d'amenée du fluide de refroidissement et dont la sortie est ouverte vers l'atmosphère ambiante.
  31. Système de bouclier thermique selon la revendication 30, caractérisé en ce que l'élément de bouclier thermique (2) est disposé à distance de l'isolation thermique (3), avec formation d'un canal (30) pour le fluide de refroidissement, en forme de fente.
  32. Système de bouclier thermique selon la revendication 31, caractérisé en ce que la distance est comprise entre 0,3 et 1,5 mm et est de préférence de 1 mm.
  33. Système de bouclier thermique selon la revendication 31 ou 32, caractérisé par au moins une pièce d'écartement (31), qui est formée entre l'élément de bouclier thermique (2) et l'isolation thermique (3).
  34. Système de bouclier thermique selon la revendication 33, caractérisé en ce qu'au moins trois pièces d'écartement (31) sont disposées sur un cercle imaginaire (K), le centre du cercle imaginaire (K) coïncidant pour l'essentiel avec le centre (Z) de l'élément de bouclier thermique (2).
  35. Système de bouclier thermique selon la revendication 33 ou 34, caractérisé en ce que les pièces d'écartement (31) sont installées contre l'élément de bouclier thermique (2) et/ou l'isolation thermique (3).
  36. Système de bouclier thermique selon la revendication 35, caractérisé en ce que les pièces d'écartement (31) sont réalisées d'une manière monobloc avec l'élément de bouclier thermique (2) où l'isolation thermique (3).
  37. Système de bouclier thermique selon l'une des revendications 33 à 36, caractérisé en ce que les pièces d'écartement (31) sont configurées sous forme de boutons.
  38. Système de bouclier thermique selon la revendication 37, caractérisé en ce que les pièces d'écartement (31) ont une surface d'appui dont l'aire est de 9 à 64 mm2 et de préférence de 25 mm2.
  39. Système de bouclier thermique selon l'une des revendications 38 à 38, caractérisé en ce que le canal d'amenée du fluide de refroidissement est formé par le canal (8) aménagé dans la brique isolante (3).
  40. Système de bouclier thermique selon la revendication 26 ou 27 et l'une des revendications 30 à 39, caractérisé en ce que le capuchon (18) comporte au moins un trou (29) d'amenée du fluide de refroidissement.
  41. Système de bouclier thermique selon la revendication 40, caractérisé en ce que le trou (29) d'amenée du fluide de refroidissement forme un étranglement pour le fluide de refroidissement.
  42. Système de bouclier thermique selon la revendication 40 ou 41, caractérisé en ce que le capuchon (18) est configuré de façon à être essentiellement étanche à l'air vis-à-vis de l'environnement.
EP97925907A 1996-06-11 1997-06-10 Systeme de bouclier thermique, notamment pour elements structuraux d'installations a turbine a gaz Expired - Lifetime EP0904512B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19623300A DE19623300A1 (de) 1996-06-11 1996-06-11 Hitzeschildanordnung, insbesondere für Strukturteile von Gasturbinenanlagen, mit geschichtetem Aufbau
DE19623300 1996-06-11
PCT/DE1997/001169 WO1997047925A1 (fr) 1996-06-11 1997-06-10 Systeme de bouclier thermique, notamment pour elements structuraux d'installations a turbine a gaz

Publications (2)

Publication Number Publication Date
EP0904512A1 EP0904512A1 (fr) 1999-03-31
EP0904512B1 true EP0904512B1 (fr) 2002-08-21

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Country Link
US (1) US6085515A (fr)
EP (1) EP0904512B1 (fr)
JP (1) JP2000512370A (fr)
KR (1) KR20000016569A (fr)
DE (2) DE19623300A1 (fr)
RU (1) RU2184319C2 (fr)
UA (1) UA45455C2 (fr)
WO (1) WO1997047925A1 (fr)

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Also Published As

Publication number Publication date
RU2184319C2 (ru) 2002-06-27
JP2000512370A (ja) 2000-09-19
UA45455C2 (uk) 2002-04-15
US6085515A (en) 2000-07-11
DE19623300A1 (de) 1997-12-18
WO1997047925A1 (fr) 1997-12-18
DE59708012D1 (de) 2002-09-26
KR20000016569A (ko) 2000-03-25
EP0904512A1 (fr) 1999-03-31

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