EP1319154A1 - Brique de protection thermique, chambre de combustion a garniture interieure et turbine a gaz - Google Patents

Brique de protection thermique, chambre de combustion a garniture interieure et turbine a gaz

Info

Publication number
EP1319154A1
EP1319154A1 EP01969734A EP01969734A EP1319154A1 EP 1319154 A1 EP1319154 A1 EP 1319154A1 EP 01969734 A EP01969734 A EP 01969734A EP 01969734 A EP01969734 A EP 01969734A EP 1319154 A1 EP1319154 A1 EP 1319154A1
Authority
EP
European Patent Office
Prior art keywords
heat shield
combustion chamber
shield brick
brick
wall
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.)
Withdrawn
Application number
EP01969734A
Other languages
German (de)
English (en)
Inventor
Daniel Hofmann
Paul-Heinz Jeppel
Hans Maghon
Uwe Rettig
Milan Schmahl
Christine Taut
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
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP01969734A priority Critical patent/EP1319154A1/fr
Publication of EP1319154A1 publication Critical patent/EP1319154A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F23R3/002—Wall structures
    • 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
    • F23M5/02—Casings; Linings; Walls characterised by the shape of the bricks or blocks used
    • 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
    • F27D1/0003—Linings or walls
    • F27D1/0033—Linings or walls comprising heat shields, e.g. heat shieldsd
    • 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
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/00012—Details of sealing devices
    • 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
    • F27D1/06—Composite bricks or blocks, e.g. panels, modules
    • F27D1/063—Individual composite bricks or blocks

Definitions

  • the invention relates to a heat shield block, in particular for lining a combustion chamber wall, with a hot medium can be exposed to the hot side, one of the hot wall side opposite and adjacent to the hot side and the wall side "peripheral side having a peripheral side surface.
  • The', '' invention relates to further comprising a combustion chamber with an interior; combustor liner and a gas turbine •.
  • a thermally and / or thermomechanically highly loaded combustion chamber such as a furnace, a hot gas duct or a combustion chamber of a gas turbine, in which a hot medium is generated and / or guided, is provided with a suitable lining to protect it from excessive thermal stress.
  • the lining usually consists of heat-resistant material and protects a wall of the combustion chamber from direct contact with the hot medium and the associated strong thermal stress.
  • US Pat. No. 4,840,131 relates to fastening ceramic lining elements to a wall of an oven.
  • a rail system which is fastened to the wall and has a plurality of ceramic rail elements, is provided. Thanks to the rail system, the lining elements can be held on the wall. Additional ceramic layers can be provided between a lining element and the wall of the furnace, including a layer of loose, partially compressed ceramic fibers, this layer having at least approximately the same thickness as the ceramic lining elements or a greater thickness.
  • the lining elements have a rectangular shape with a planar surface and consist of a heat-insulating refractory ceramic fiber material.
  • U.S. Patent 4,835,831 also deals with the application of a refractory lining to a wall of an oven, particularly a vertically arranged wall.
  • a layer of glass, ceramic or mineral fibers is applied to the metal wall of the furnace. This layer is attached to the wall using metal clips or glue.
  • a wire mesh network with honeycomb-shaped meshes is fanned out on this layer. The mesh network also serves to secure the layer of ceramic fibers against falling.
  • a suitable spraying method a uniform, closed surface made of refractory material is applied to the layer thus fastened. The method described largely avoids that refractory particles striking during spraying are thrown back, as would be the case if the refractory particles were sprayed directly onto the metallic wall.
  • a ceramic lining of the walls of thermally highly stressed combustion chambers is described in EP 0 724 116 A2.
  • the lining consists of wall elements made of high-temperature-resistant structural ceramics, such as silicon carbide (SiC) or silicon nitride (SiN 4 ).
  • the wall elements are mechanically and resiliently attached to a metal support structure (wall) of the combustion chamber by means of a central fastening bolt.
  • a thick thermal insulation layer is provided between the wall element and the wall of the combustion chamber, so that the wall element is appropriately spaced from the wall of the combustion chamber.
  • the insulation layer which is about three times thicker than the wall element, consists of ceramic fiber material that is prefabricated in blocks.
  • the Dimensions and external shape . the wall elements can be adapted to the geometry of the room to be lined.
  • the lining consists of heat shield elements that are mechanically held on a metallic wall of the combustion chamber.
  • the heat shield elements directly touch the metallic wall. To avoid excessive heating of the wall, e.g. as a result of a direct
  • the sealing air prevents the penetration of hot medium up to the wall and simultaneously cools the wall and the heat shield element.
  • WO 99/47874 relates to a wall segment for a combustion chamber and a combustion chamber of a gas turbine.
  • a wall segment for a combustion chamber which is filled with a hot fluid, e.g. a hot gas, can be acted upon, with a metallic support structure and a heat protection element attached to the metallic support structure. Between the metallic support structure and that
  • a deformable separating layer is inserted in the heat protection element, which should absorb and compensate for possible relative movements of the heat protection element and the supporting structure.
  • Such relative movements can be caused, for example, in the combustion chamber of a gas turbine, in particular an annular combustion chamber, by different thermal expansion behavior of the materials used or by pulsations in the combustion chamber, which can occur in the event of irregular combustion to generate the hot working medium or by resonance effects.
  • the separating layer causes the relatively inelastic heat protection element as a whole lies flat on the separating layer and the metallic support structure, since the heat protection element partially penetrates into the separating layer. In this way, the separating layer can compensate for unevenness in the support structure and / or the heat protection element, which can lead to an unfavorable selective force input locally.
  • the invention is based on the observation that, in particular ceramic, heat shield stones due to their necessary flexibility with regard to thermal
  • Extensions are often insufficiently secured against mechanical loads such as shocks or vibrations.
  • the invention is accordingly based on the object of specifying a heat shield brick which ensures high operational reliability both in terms of unlimited thermal expansion and in terms of stability against mechanical, in particular shock-like, loads.
  • Another object of the invention is to provide a combustion chamber with an internal one
  • Combustion chamber lining and the specification of a gas turbine with a combustion chamber Combustion chamber lining and the specification of a gas turbine with a combustion chamber.
  • a heat shield brick in particular for lining a combustion chamber wall, with a hot side that can be exposed to a hot medium, a wall side opposite the hot side and a peripheral side adjacent to the hot side and the wall side and having a peripheral side surface that a tensile element that is prestressed in the circumferential direction is provided on the circumferential side, a compressive stress being generated normal to the circumferential side surface.
  • the invention shows a completely new concept, heat shield stones against high accelerations as a result Securing shocks or vibrations permanently.
  • the invention is based on the knowledge that combustion chamber bricks, as are usually used for lining a combustion chamber wall, are excited to corresponding vibrations by stationary and / or transient vibrations in the combustion chamber wall. In this case, in particular in a resonance case, considerable accelerations can occur above a limit acceleration, the heat shield bricks lifting off the combustion chamber wall and subsequently striking again. Such an impact on the solid or partially damped combustion chamber wall leads to very high forces on the heat shield bricks and can lead to considerable damage, for example breakage thereof.
  • there is the high thermal load on the heat shield brick due to the hot medium being exposed to a hot medium during operation. Cracks can thus occur both on the wall side and on the hot side of the heat shield brick, and there is also the risk of material coming out of the heat shield brick. This leads to a significant one
  • the provision of the tension element on the peripheral side of the heat shield brick advantageously dampens vibrations and / or shock loads with a component normal to the peripheral side surface.
  • the damping constant can be set in accordance with the loads that occur.
  • shock loads normal to the circumferential side surface can occur, for example, when several heat shield stones are arranged as a result of the relative movement of adjacent heat shield stones. This damping ensures a longer use of the heat shield brick.
  • the design of the heat shield brick with the tension element also has the advantage of problem-free prefabrication and simple assembly of the heat shield brick, for example for assembly in one Combustion chamber wall.
  • the tension element is simply attached to the circumferential side and pretensioned in the circumferential direction as required.
  • Separate damping and / or securing elements as can also be found in conventional heat shield bricks, require a considerably greater assembly and adjustment effort than the heat shield brick of the invention. In the event of a revision, only the heat shield brick may have to be replaced, but not additional securing elements. This high flexibility on the one hand and the achievable
  • Durability of the heat shield brick is also of particular advantage from an economic point of view.
  • inspection or maintenance intervals for the heat shield brick for example when used in a combustion chamber of a gas turbine, are extended.
  • operation for the revision of the system does not have to be stopped immediately because, due to the increased passive safety, continued operation is possible up to the regular revision interval or beyond.
  • the compressive stress that is generated normal to the circumferential side surface can be adjusted by appropriately pretensioning the tension element.
  • the tension element extends at least in regions in the circumferential direction. Due to the respective geometry of the heat shield brick, for example in the form of prisms with a polygonal base, the
  • a plurality of tension elements are preferably provided.
  • the circumferential side can be made very flexible by using several tension elements.
  • critical areas of the heat shield brick for example corners or edges, in which a tearing or breakthrough or a removal of any fragments could be expected, can be specifically secured. This further increases the operational safety of the heat shield brick.
  • a tension element completely surrounds the peripheral side surface. This configuration ensures a securing normal force on the circumferential side surface over the entire circumference of the heat shield brick. A closed ring closure is achieved, so to speak, with the
  • Heat shield stone as a whole is advantageously passively secured in an advantageous manner by the forces directed locally into the interior of the heat shield stone.
  • Such a tension element, which completely encloses the peripheral side surface can guarantee this.
  • the tension element preferably encloses the peripheral surface several times. A multiple enclosing the circumferential surface
  • the tensile element increases the securing effect of the tensile element correspondingly many times, whereby the securing forces directed normally to the circumferential side surface increase.
  • the tension element forms, so to speak, a multiple reinforcement of the heat shield brick on the peripheral side.
  • the peripheral side has a peripheral groove in which the tension element engages.
  • the circumferential groove is advantageously formed over the entire circumference on the circumferential side, for example by appropriate material-removing processing of the heat shield brick or by shaping the circumferential groove when producing the heat shield brick from a, for example ceramic, molding compound.
  • the engagement of the tension element in the circumferential groove is a very effective one
  • the tension element in the circumferential groove being additionally protected against direct exposure to a hot gas, as is provided in the operating case.
  • the circumferential groove forms a fall-out protection for the tensile element or, if several tensile elements are used, for the tensile elements engaging in the circumferential groove.
  • the circumferential groove advantageously extends over the entire circumference of the
  • the circumferential groove is not formed over the full circumference of the heat shield brick, but rather only in a selectable partial area on the circumferential side.
  • At least one further circumferential groove is provided, which is spaced apart from the circumferential groove, a tension element engaging in the further circumferential groove.
  • the circumferential groove can be provided, for example, on the end of the circumferential side facing the hot side of the combustion chamber brick, while the further circumferential groove is provided on the end of the circumferential side facing the wall side. Multiple securing with circumferential grooves, in which at least one tension element engages, is hereby ensured, the advantages mentioned for a circumferential groove being correspondingly more pronounced.
  • the tension element is preferably designed as a cord or band, in particular braided or woven. In order to apply an adjustable tensile force by means of pretension, the cord or band optionally has a certain elasticity.
  • a wire or a wire mesh can also be used as a tension element.
  • largely conventionally available preliminary products can be used for the traction element, which facilitates the implementation of the heat shield brick with the traction element and also makes the use of it seem very interesting in terms of cost.
  • the traction elements in the form of a cord or one
  • Tapes that are braided or woven, for example, can be easily applied to existing conventional heat shield stones.
  • the tension element consists of a ceramic material, in particular of a ceramic fiber material.
  • Ceramic material is resistant to high temperatures and is resistant to oxidation and / or corrosion and is therefore ideally suited for use with a heat shield brick in a combustion chamber.
  • Cords and / or tapes preferably consist of ceramic fibers which are suitable for use at up to 1200 ° C.
  • the chemical composition of these fibers is, for example, 62% by weight of A1 2 0 3 , 24% by weight of Si0 2 and 14% by weight of B 2 0 3 .
  • the fibers are composed of a large number of individual filaments, the filaments having a diameter of approximately 10 to 12 ⁇ m.
  • the maximum crystallite size for these ceramic fibers is typically 500 nm.
  • the ceramic fiber material can be used to easily produce fabrics, knitted fabrics or braids of the desired size and thickness, or else cords or ribbons. With such a tension element ensures permanent securing of the heat shield brick even at very high operating temperatures, such as occur, for example, in a combustion chamber of a gas turbine.
  • the tension element is preferably at least partially glued to the heat shield brick.
  • the glue provides additional securing of the tension element against a possible one. Removal achieved and durability increased accordingly.
  • both a conventional adhesive and a high-temperature-resistant adhesive can be used.
  • Silicate-based adhesives can also be used, which have excellent adhesive properties and great temperature resistance.
  • the use of ceramic or metallic materials for the tension element, in particular in the case of a ceramic cord or a ceramic tape, has proven to be particularly advantageous because this has a certain air permeability (porosity) due to the fabric structure, which means that the tension element is well connected to the Heat shield stone transported.
  • the gluing is particularly effective if the configuration is selected with a circumferential groove in which a tension element engages.
  • the adhesive can be let into the circumferential groove for gluing, as a result of which a particularly secure connection can be established.
  • the adhesive can be introduced locally at various points in the circumferential groove or can partially or completely wet the circumferential groove, for example in the groove base.
  • the traction element becomes, as it were, an integral part of the heat shield brick due to the gluing, the gluing being releasable or, if desired, non-releasable for a revision case.
  • the heat shield brick preferably consists of a ceramic base material, in particular of a refractory ceramic.
  • a ceramic as the base material for the heat shield brick, the use of the heat shield brick is up to guaranteed very high temperatures, while at the same time oxidative and / or corrosive attacks, such as occur when the hot side of the heat shield brick is exposed to a hot medium, for example a hot gas, are largely harmless to the heat shield brick.
  • the tension element can be easily connected to the ceramic base material of the heat shield brick.
  • the fixed connection can also be designed as a releasable connection.
  • the attachment of the tension element by means of suitable fastening elements on the circumferential side is also possible.
  • a tension element which at least partially consists of a ceramic material, a good adaptation to the ceramic base material of the
  • Heat shield stone achieved in terms of thermomechanical properties. Due to the fixed connection of the tension element to the base material, the heat shield brick is advantageously designed in a kind of composite with the tension element. This results in a compact design and structure of the heat shield brick, which has an extraordinarily high durability and passive safety even with high thermal and / or mechanical loads. This is a particularly great advantage when using the heat shield brick in a combustion chamber, because even after a crack or material tear, the heat shield function of the heat shield brick is still guaranteed, and in particular no fragments can get into the combustion chamber.
  • the combustion chamber can be operated at least with the usual maintenance cycles, but it is also possible to extend the service life due to the increased passive safety with the pulling element.
  • the object directed to a combustion chamber is achieved according to the invention by a combustion chamber with an internal combustion chamber lining which has heat shield bricks according to the above statements.
  • the object directed to a gas turbine is achieved according to the invention by a gas turbine with such a combustion chamber.
  • FIG. 1 shows a perspective view of a
  • FIG. 3 shows a perspective view of a heat shield brick modified compared to FIG. 1,
  • FIGS. 4 to 6 each show a view of a heat shield brick with a modified arrangement of the tension element compared to FIGS. 1 to 3,
  • Heat shield stones with circumferential groove, 8 and 9 each show a sectional view of a
  • the heat shield brick 1 shows a perspective view of a heat shield brick 1.
  • the heat shield brick 1 has a hot side 3 and a wall side 5 opposite the hot side 3.
  • a peripheral side 7 of the heat shield brick 1 adjoins the hot side 3 and the wall side 5.
  • the peripheral side 7 has a peripheral side surface 9.
  • the hot side 3 is acted upon by a hot medium, for example a hot gas, when the heat shield brick is used.
  • a tensile element 11 is provided which is prestressed in the circumferential direction.
  • the tension element is prestressed in such a way that a compressive stress is generated normal to the peripheral side surface 9. In order to generate a prestress in the circumferential direction, the tension element can have a certain elasticity. With the tension element 11 is a significant increase in passive safety and thus
  • FIG. 2 which shows a plan view of the heat shield brick shown in FIG. 1 on the hot side 3
  • the tension element 11 is over the full circumference , the heat shield stone 1 attached to the circumferential side.
  • compressive forces S1, S2, S3, S4 are generated normal to the circumferential side surface 9.
  • the compressive forces S1 to S4 are directed inward into the interior of the heat shield brick 1.
  • the heat shield brick 1 is cuboid, here designed with a square base.
  • Material breakout prevents material from coming out of the heat shield brick 1.
  • the durability of the heat shield brick 1 is thereby increased, so that a revision of the heat shield brick 1 is not necessary even in the case of a material breakdown, but the usual revision and maintenance cycles or longer intervals are achieved.
  • the heat shield brick 1 is secured by the pulling element 11, because possible fragments can only be removed from the composite of the heat shield brick 1 with a lot of work.
  • the compressive forces S1 to S4 induced by the tension element 11 hold the heat shield brick 1 together permanently.
  • the tension element 11 is in the present example of a band-shaped geometry.
  • the tension element 11 can in particular be braided or woven.
  • FIG. 3 shows a perspective view of a heat shield brick 1, the heat shield brick 1 having a first tension element 11A and a second tension element 11B compared to the illustration in FIG. 1.
  • the tension elements 11A, 11B are provided on the circumferential side 7 and are prestressed in the circumferential direction, so that a compressive stress is generated normal to the circumferential side surface 9.
  • the first Traction element 11A is arranged on the end of the peripheral side 7 facing the hot side 3.
  • the tension element 11B is arranged at the end of the peripheral side 7 assigned to the wall side 5.
  • Tension elements 11A, 11B can be safely avoided both in the area of the hot side 3 and in the area of the wall side 5 due to the compressive forces normal to the circumferential side surface 9 and possible breakage due to thermally induced cracking on the wall side 5 or the hot side 3 due to impact fracture.
  • FIGS. 4 to 6 show different views of a heat shield brick 1.
  • 4 shows a first side view
  • FIG. 5 shows a second side view rotated by 90 °
  • FIG. 6 shows a top view of the hot side 3 of the heat shield brick 1.
  • Four tension elements 11A, 11B, 11C, HD are provided, which are each attached to the circumferential side 7 under prestress.
  • Each of the tension elements HA to HD extends over three of the four side surfaces of the cuboid heat shield brick.
  • the tension elements HA, HB are provided on the end of the peripheral side 7 facing the hot side 3.
  • the tension elements HC, HD are arranged on the end of the peripheral side 7 facing the wall side 5.
  • FIG. 7 shows a perspective view of a heat shield brick 1 with respect to FIGS. 1 to 6 modified design.
  • the heat shield brick 1 has a circumferential groove 13 on the circumferential side 7.
  • the circumferential groove 13 is formed over the entire circumference of the heat shield brick 1.
  • a tension element 11 engages in the circumferential groove 13.
  • the tension element 11 in the circumferential groove 13 encloses the
  • Circumferential side surface 9 twice. It is also possible for the tension element 11 to enclose the peripheral side surface 9 several times, in particular three or four times (see FIGS. 8 to 10).
  • the engagement of the tension element 11 in the circumferential groove 13 protects the tension element 11 in addition to increasing the passive safety of the heat shield brick 1. For example, when the heat shield brick 1 is used in a combustion chamber, direct action on the tension element 11 with a hot, corrosive or oxidative gas can be prevented by the engagement in the groove 13.
  • FIGS. 8 and 9 each show a sectional view of a heat shield brick 1.
  • the heat shield brick 1 of FIG. 8 has a circumferential groove 13, while the heat shield brick 1 of FIG. 9 has a circumferential groove 13A and a further circumferential groove 13B.
  • a respective tension element 11, HA, HB engages in the circumferential grooves 13, 13A, 13B.
  • the tension elements HA, HB, HC enclose the peripheral side surface 9 several times.
  • the tension element 11 in the circumferential groove 13 surrounds the circumferential sides 9 in triplicate (FIG 8), while the tension element HA encloses the circumferential side surface 9 in four and the tension element HB in three times.
  • the heat shield brick 1 here consists of a ceramic base material 19, in particular a refractory ceramic.
  • the tension elements 11, HA, HB advantageously also consist of a ceramic material 15, for example a ceramic fiber material, which is braided in the form of a ribbon or cord or woven. This makes it possible to simply wrap the heat shield brick 1 with the tension elements 11, HA, HB by applying a certain pretension in the circumferential direction. The engagement of the tension elements 11, HA, HB in the respective circumferential groove 13, 13A, 13B at the same time secures the tension elements 11, HA, HB against loosening.
  • circumferential groove 13, 13A, 13B can also only partially enclose the circumferential side surface 9.
  • the number and arrangement of circumferential grooves 13, 13A, 13B with tension elements 11, HA, HB engaging therein can be designed depending on the respective geometry and the load case of the heat shield brick 1.
  • FIG. 10 shows an arrangement with a heat shield brick 1 and a further heat shield brick 1A.
  • the heat shield stones 1, 1A have a respective circumferential groove 13, 13A, in which a respective tension element 11, HA engages.
  • each of the tension elements 11, HA is at least partially glued to the respective heat shield block 1.1A by means of an adhesive 45.
  • the adhesive 45 establishes a firm connection of the tension elements 11, HA with the heat shield stones 1.1A in the respective circumferential groove 13.13A.
  • the heat shield brick 1 and the further heat shield brick 1A are arranged to form a gap 35.
  • the gap 35 is closed by the multiple arrangement of the tension elements 11, HA in the circumferential grooves 13, 13 A in such a way that a possible flow when the hot side 3 is acted on a hot medium, for example a hot gas, is largely prevented from an area facing the hot side 3 through the gap 35 to an area assigned to the wall side 5.
  • a hot medium for example a hot gas
  • the heat shield stones 1, 1 A are restricted with respect to relative movements along a horizontal shock axis 47, shock absorption along the horizontal shock axis 47 being additionally achieved by the adjacent tension elements 11, HA of the respective heat shield stones 1, 1A in the area of the gap 35.
  • This is of particular advantage when using the heat shield stones 1.1A in the combustion chamber of a gas turbine, where vibrations can occur as a result of combustion pulsations in the combustion chamber and there is a risk of an impact fracture.
  • FIG. 11 shows a support structure 21, for example a support wall, into which fastening grooves 33 are incorporated.
  • the fastening grooves 33 extend along a groove axis 43 in the support structure 21.
  • the heat shield brick 1 and the further heat shield brick 1A are fastened to the support structure 21 via respective fastening elements 23, the heat shield stones 1, 1A being arranged adjacent to one another along the groove axis 43.
  • the top view in FIG. 11 shows a view of the heat shield stones 1.1A on the hot side 3, which is acted upon by a hot gas, for example a combustion gas, during operation.
  • Each of the heat shield stones 1, 1 A has a respective tension element 11, HA.
  • the tension elements 11, HA engage in a respective one
  • FIG. 12 shows a gas turbine 27 in a highly schematic longitudinal section. The following are arranged in succession along a turbine axis 37: a compressor 39, a combustion chamber 25 and a turbine part 41.
  • the combustion chamber 25 is lined with a combustion chamber lining 29 on the inside.
  • the combustion chamber lining 29 comprises a combustion chamber wall 31, which at the same time has a support structure 21 (cf. also FIG. 11).
  • the combustion chamber lining 29 further comprises heat shield stones 11, HA, HB which are fastened to the support structure 21.
  • the heat shield stones 11, HA, HB are designed in accordance with the above statements.
  • the heat shield stones 11, HA, HB are acted upon by a hot medium M, in particular a hot gas. This leads to considerable thermal loads on the hot side 3 of the heat shield stones 11, HA, HB.
  • there can also be considerable vibrations for example due to combustion chamber hum. In the event of resonance, even sudden acoustic combustion chamber vibrations with large vibration amplitudes can occur.
  • the heat shield bricks 1.1A, 1B which have a tension element 11, HA, HB, are both for exposure to the high temperatures of a hot medium M, for example up to 1400 ° C. in a gas turbine 29, and also for a high mechanical one

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

Abstract

L'invention concerne une brique de protection thermique (1), destinée notamment à la garniture d'une paroi de chambre de combustion. Cette brique comporte un côté </= chaud >/= (3) pouvant être exposé à un milieu chaud, un côté paroi (5) situé à l'opposé du côté chaud (3) et un côté périphérique (7), adjacent au côté chaud (3) et au côté paroi (5), présentant une face latérale périphérique (9). Un élément de tension (11) pré-tendu dans le sens périphérique est situé contre le côté périphérique (7), une tension de compression étant générée perpendiculairement à la face latérale périphérique. L'invention concerne également une chambre de combustion présentant une garniture constituée de briques de protection thermique selon l'invention, ainsi qu'une turbine à gaz comprenant une chambre de combustion.
EP01969734A 2000-09-22 2001-09-18 Brique de protection thermique, chambre de combustion a garniture interieure et turbine a gaz Withdrawn EP1319154A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01969734A EP1319154A1 (fr) 2000-09-22 2001-09-18 Brique de protection thermique, chambre de combustion a garniture interieure et turbine a gaz

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP00120788 2000-09-22
EP00120788A EP1191285A1 (fr) 2000-09-22 2000-09-22 Bouclier thérmique , chambre de combustion avec garnissage interne et turbine à gaz
PCT/EP2001/010790 WO2002025173A1 (fr) 2000-09-22 2001-09-18 Brique de protection thermique, chambre de combustion a garniture interieure et turbine a gaz
EP01969734A EP1319154A1 (fr) 2000-09-22 2001-09-18 Brique de protection thermique, chambre de combustion a garniture interieure et turbine a gaz

Publications (1)

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EP1319154A1 true EP1319154A1 (fr) 2003-06-18

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EP00120788A Withdrawn EP1191285A1 (fr) 2000-09-22 2000-09-22 Bouclier thérmique , chambre de combustion avec garnissage interne et turbine à gaz
EP01969734A Withdrawn EP1319154A1 (fr) 2000-09-22 2001-09-18 Brique de protection thermique, chambre de combustion a garniture interieure et turbine a gaz

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EP00120788A Withdrawn EP1191285A1 (fr) 2000-09-22 2000-09-22 Bouclier thérmique , chambre de combustion avec garnissage interne et turbine à gaz

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US (1) US6832484B2 (fr)
EP (2) EP1191285A1 (fr)
CA (1) CA2423196C (fr)
WO (1) WO2002025173A1 (fr)

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Also Published As

Publication number Publication date
CA2423196C (fr) 2009-11-03
US20030177770A1 (en) 2003-09-25
CA2423196A1 (fr) 2003-03-20
EP1191285A1 (fr) 2002-03-27
WO2002025173A1 (fr) 2002-03-28
US6832484B2 (en) 2004-12-21

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