EP1884713B1 - Heat shield arrangement, particularly for a gas turbine - Google Patents

Heat shield arrangement, particularly for a gas turbine Download PDF

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Publication number
EP1884713B1
EP1884713B1 EP06015431A EP06015431A EP1884713B1 EP 1884713 B1 EP1884713 B1 EP 1884713B1 EP 06015431 A EP06015431 A EP 06015431A EP 06015431 A EP06015431 A EP 06015431A EP 1884713 B1 EP1884713 B1 EP 1884713B1
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EP
European Patent Office
Prior art keywords
heat shield
shield arrangement
fastening bolt
recess
arrangement
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.)
Active
Application number
EP06015431A
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German (de)
French (fr)
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EP1884713A1 (en
Inventor
Olga Deiss
Holger Grote
Andreas Heilos
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
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE502006008609T priority Critical patent/DE502006008609D1/en
Priority to EP06015431A priority patent/EP1884713B1/en
Priority to AT06015431T priority patent/ATE493617T1/en
Priority to ES06015431T priority patent/ES2356914T3/en
Publication of EP1884713A1 publication Critical patent/EP1884713A1/en
Application granted granted Critical
Publication of EP1884713B1 publication Critical patent/EP1884713B1/en
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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
    • F23R3/007—Continuous combustion chambers using liquid or gaseous fuel constructed mainly of ceramic components
    • 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
    • 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

Definitions

  • the invention relates to a heat shield assembly comprising a support structure and a heat shield, wherein the heat shield has a cold side resting on the support structure and a hot side opposite the cold side and a peripheral side connecting the cold side to the hot side, wherein at least one recess is introduced into the peripheral side of the heat shield is.
  • high temperature gas reactors such as pressurized combustors such as those used in gas turbines
  • high thermal stresses such as hot gas
  • ceramic materials offering high temperature resistance, corrosion resistance and low thermal conductivity are suitable for this purpose.
  • Such a heat shield goes out of the EP 0 558 540 B1 out.
  • a heat shield for the combustion chamber of a gas turbine with a support structure which has a hot side and a cold side and an edge connecting the hot and cold side.
  • the flank gripping tabs are introduced, in which holder engage for attachment of the heat shield to the support structure, the holder overlap the flanks partially.
  • the support structure have grooves. The holders are pushed into these grooves. The holders are thus secured in the support structure and thereby partially clasp the heat shield on its flanks.
  • the cross-sectional profile is designed so that the end of the holder which is made with the largest width, is held in the groove.
  • the slightly narrower executed spring portion of the holder can be bent from the groove base for applying the retaining bias.
  • the retaining elements remain displaceable in the groove, but are perpendicular to the support structure surface held positively.
  • the holders no longer need to be fastened to the support structure with screws.
  • a disadvantage of this method of attachment is that the heat shields, which line the combustion chamber interior, for attachment to the support structure always row by row and always have to be fixed sequentially (attachment in the circumferential direction). This means that in the case of a leading to replacement findings on the heat shield, this can not be replaced individually. Rather, a chain of heat shields -aus obtained to be replaced from a mounting start position to the heat shield to be replaced, with the risk of dismantling damage. This represents on the one hand a high workload and on the other high material costs by replacing the damaged only when disassembled heat shields, but also by the longer working hours.
  • US 5243801 A describes a heat shield assembly comprising a support structure 27 and a heat shield 40, wherein the heat shield 40 has a resting on the support structure 27 cold side 42 and the cold side 42 opposite hot side 41 and a peripheral side 43 which connects the cold side 42 with the hot side 42, wherein the circumferential side 43 of the heat shield 40 is a recess 46 is introduced, wherein a in the direction substantially perpendicular to the recess 46 extending recess 47 is provided, which extends from the recess 46 to the cold side 42 and wherein for fixing the heat shield 40 to the Supporting structure 27, a fastening bolt 60 is inserted into the recess 47 and wherein the fastening bolt 60 has a bolt head 62.
  • the object of the invention is therefore to provide an improved heat shield assembly, which is particularly easy to service during maintenance and installation.
  • the heat shield assembly should be usable in a combustion chamber for gas turbines.
  • a heat shield arrangement comprising a support structure and a heat shield, the heat shield having a cold side resting on the support structure and a hot side opposite the cold side, and a peripheral side connecting the cold side to the hot side, wherein at least one of the peripheral sides of the heat shield Recess is introduced, wherein a recess extending in the direction substantially perpendicular to the recess is provided, which extends from the recess to the cold side and wherein a fastening bolt is inserted into the recess for attachment of the heat shield to the support structure.
  • the invention is based on the finding that a recess can be introduced into the heat shield on the cold wall side, without causing a noticeable weakening of the heat shield with regard to shortened service life. Therefore At least one recess is introduced into the peripheral side. Starting from this recess, a recess is introduced. This extends from the recess to the cold side, that is to the support structure. In this recess, a fastening bolt is introduced. By means of this fastening bolt, the heat shield is attached to the support structure. The fastening bolt in the interior of the heat shield and the support structure is thus accessible from the outside.
  • the bolt is thus combustion chamber inside accessible and detachable from the support structure.
  • the heat shield is thus individually solvable from a chain of heat shields.
  • the fastening bolt has a bolt head. This pushes the heat shield on the support structure.
  • the fastening bolt comprises a holding plate.
  • the heat shield As a result, the direct contact of the bolt head is avoided with the heat shield.
  • the pressure occurring by means of which the heat shield is clamped tightly to the support structure is transmitted as uniformly through the retaining plate to the heat shield. Furthermore, it serves as a spacer to the adjacent heat shield. The fastening bolt is thus also secured against slipping in the recess.
  • the retaining plate of the fastening bolt is cooled by means of at least one cooling opening.
  • the retaining plates can be cooled by the support structure with targeted cooling air jets or coolant streams. In this case, not only the retaining plate is cooled, but also prevents entry of hot gas into the gaps of adjacent heat shields.
  • the heat shield on the peripheral side on two opposite retaining plates for attaching the heat shield to the support structure.
  • these two retaining plates partially surround the peripheral side in the direction from the cold side to the hot side.
  • the retaining plates are plugged into the recess for fastening the heat shield to the support structure.
  • only one retaining plate has a slot on a facing side of two adjacent heat shields. In the case of two adjacent retaining plates, only one is thus configured with the fastening bolt according to the invention in the recess according to the invention.
  • the other retaining plate may for example be attached to the support structure as in the prior art.
  • the heat shield is provided with only one recess, which is advantageous for the resistance of the heat shield, since the thermal expansion of the heat shield is not hindered.
  • a heat shield assembly always has a prior art fastener and a fastener according to the invention.
  • their common side therefore advantageously has different fastenings.
  • resiliently fixed screws are also mounted in the support structure. These then press the retaining plate to a bias. During assembly, fastening bolts and retaining plate can be inserted laterally into the heat shield.
  • the fastening bolt is a screw holder.
  • a thread is provided in or on the support structure.
  • To attach the screw is tightened, that is, a tension exerted on the heat shield.
  • the bolt head is at least partially inserted in the recess. This has the advantage that the bolt head is largely protected in the recess against, for example hot gas. In addition, the force that presses the bolt head against the heat shield, transferred to the heat shield better.
  • the fastening bolt is sprung. By a suspension of the fastening bolt, the torque of the fastening bolt can be adjusted more targeted.
  • the recess is centrally inserted in the peripheral side.
  • a central attachment of the recess increases the resistance of the heat shield with respect to cracking and breakage. If the peripheral side is divided by the recess into two very different halves, fractures and cracks can be created much more easily due to the smaller material thickness in the thinner half.
  • the recess is designed as a longitudinal groove. This can be easily realized in terms of manufacturing technology.
  • the recess is designed as a holding pocket. This not only the vertical fixation of the heat shield, but also an axial fixation is possible. Thus, an increase in the strength of the heat shield in the region of the holder is given in comparison with the execution of the longitudinal groove.
  • the holding pocket also focuses the coolant on the holding elements and thus reduces the coolant requirement. In addition, the rework can be reduced here. Furthermore, this can cause a further saving of coolant, since this is a substitute for the used in the prior art final heat shields can be used.
  • a hole aligned with the bolt head is mounted in the heat shield from the hot side.
  • the fastening bolt from the hot side that is inside the combustion chamber, forth solvable.
  • the fastening bolt is air-cooled from the inside.
  • the fastening bolts are cooled by the air itself. Furthermore, it is prevented by the outflowing air that hot gas enters the recess. This has a life-prolonging effect on the fastening bolts.
  • the support structure has cooling openings.
  • the fastening bolts and the retaining plates are supplied with cooling air on the one hand.
  • the cooling can be used very effectively and selectively, for example by impingement cooling of the retaining plates, whereby the cooling air consumption is minimized.
  • At least one cooling opening on the retaining plate and thus causes a particularly good cooling.
  • the heat shield is preferably made of ceramic material, in particular a porous ceramic.
  • the fastening bolt is made of metal or metal alloy.
  • the gas turbine 1 has a compressor 2 for combustion air, a combustion chamber 4 and a turbine 6 for driving the compressor 2 and a generator or a work machine, not shown, in the compressor 4, compressed air L is compressed.
  • the turbine 6 and the compressor 2 are arranged on a common, also called turbine rotor turbine shaft 8, with which the generator or the working machine is connected, and which is rotatably mounted about its central axis.
  • the turbine 6 has a number of rotatable blades 12 connected to the turbine shaft 8.
  • the blades 12 are arranged in a ring on the turbine shaft 8 and thus form a number of blade rows.
  • the rotor blades 6 serve to drive the turbine shaft 8 by momentum transfer from the hot medium flowing through the turbine 6, the working medium, for example the hot gas M.
  • the guide vanes 14, serve to guide the flow of the working medium, for example the Hot gases M.
  • resulting hot gas M flows in the flow direction S from the combustion chamber 4 to the turbine 6.
  • For the combustion chamber 4 is designed with heat shields.
  • FIGS. 2 and 3 show the heat shield assembly 20 with a heat shield 22 and a support structure 28 at a time from obliquely above and in cross section.
  • a heat shield is shown with a retaining plate 48 according to the prior art.
  • the heat shield 22 has a hot side 24, a cold side 26 and a peripheral side 30.
  • a recess 34 is located advantageously approximately in the middle of the peripheral side 30.
  • a recess 32 extends from the recess 34 to the cold side 26 of the heat shield 22.
  • a fastening bolt 36 is here designed as a screw holder 36, introduced.
  • the screw holder 36 has a bolt head 38.
  • a holding plate 40 is attached in such a way that the expansion of the heat shield 22 and the screw holder 36 is possible.
  • the direct contact of the head 38 with the heat shield 22 in the recess 34 is avoided.
  • the occurring pressure by means of which the heat shield 22 is firmly clamped to the support structure 28 is transmitted as evenly through the retaining plate 40 to the heat shield 22.
  • it serves as a spacer to the adjacent heat shield. This ensures a slip-proof fastening.
  • a screw 42 is mounted with internal thread.
  • the screw 42 now the screw holder 36 is attached.
  • heat shield 22 and support structure 28 are held together.
  • a holding plate 48 is provided according to the prior art 48, so that now the holding plate 48 according to the prior art and the attachment according to the invention of the heat shield assembly 20 are opposite.
  • the screw 42 must be provided with a flattening 54 at the top of the screw 42.
  • the heat shields 22 can expand under load. In this type of Execution is thus saved a recess 32 in the heat shield 22.
  • the heat shield assembly may also include a plurality of fasteners according to the invention. Even then, a direct disassembly of the heat shields is guaranteed.
  • a spacer 50 is further provided. This allows the expansion of the heat shield.
  • resiliently fixed screws are provided (not shown) with which the retaining plate 40 is pressed into the recess 34 to a necessary bias.
  • the screw holder 36 with bolt head 38 and retaining plate 40 can be inserted laterally into the recess 34.
  • the heat shield 22 with screw holder 36, bolt head 38 and retaining plate 40 can then be placed in the position on the support structure 28.
  • the screw holder 36 and its attachment in the holding plate 40 is carried out so that an expansion of the heat shield 22 is made possible. This allows in comparison to the prior art, a very simple and quick installation of the heat shields, since they are accessible from the combustion chamber inside.
  • FIG. 4 shows the top view of a heat shield assembly 20 according to the invention with a hot side 24 towards aligned hole 44.
  • the bolt head 38 can be achieved inside the combustion chamber without great effort.
  • the bolt head 36 and the screw holder 36 can be easily disassembled or screwed to the support structure 28 by screwing with the screw 42. This allows easy assembly and disassembly of the entire heat shield 22 without removing a complete chain of heat shields 22 for this purpose.
  • intact heat shields 22 can be left in the combustion chamber and are not endangered by unnecessary installation and removal.
  • a disc spring package 52 can be used for the fastening bolt 36 or the screw holder 36.
  • the recess 34 may be formed as a holding pocket 60, as in FIG. 5 is shown.
  • the holding pocket 60 also focuses the coolant on the holding elements 40 and thus reduces the coolant requirement.
  • a heat shield to be exchanged can now be dismantled at any point, for example, of a combustion chamber, without it being necessary to further remove intact heat shields.
  • a new heat shield can be used and secured with the required holding power. It must therefore only disassembled heat shields dismantled and installed there new. This reduces the time required and the risk of damaging intact heat shields during removal, further reducing the cost of maintenance.

Abstract

The arrangement has a heat shield (22) with a cooling side (26), which overlies on a support structure (28), and a heating side (24), which is opposite to the cooling side. A circumferential side connects the cooling side with the heating side. A recess (32) extends in a direction perpendicular to a cavity, where the recess extends from the cavity to the cooling side. A fastening bolt is inserted into the recess for fastening the heat shield to the support structure.

Description

Die Erfindung betrifft eine Hitzeschildanordnung umfassend eine Tragstruktur und ein Hitzeschild, wobei der Hitzeschild eine auf der Tragstruktur aufliegende Kaltseite und eine der Kaltseite gegenüberliegende Heißseite aufweist und einer Umfangsseite, die die Kaltseite mit der Heißseite verbindet, wobei in die Umfangsseite des Hitzeschilds mindestens eine Aussparung eingebracht ist.The invention relates to a heat shield assembly comprising a support structure and a heat shield, wherein the heat shield has a cold side resting on the support structure and a hot side opposite the cold side and a peripheral side connecting the cold side to the hot side, wherein at least one recess is introduced into the peripheral side of the heat shield is.

Die Wände von Hochtemperaturgasreaktoren, wie zum Beispiel von unter Druck betriebenen Brennkammern wie sie in Gasturbinen zum Einsatz kommen, müssen mit geeigneten Abschirmungen ihrer tragenden Struktur gegen hohe thermische Belastungen wie beispielsweise Heißgas geschützt werden. Hierfür bieten sich neben metallischen auch keramische Materialien an, die sich durch eine hohe Temperaturbeständigkeit, Korrosionsbeständigkeit und niedrige Wärmeleitfähigkeit auszeichnen.The walls of high temperature gas reactors, such as pressurized combustors such as those used in gas turbines, must be shielded against high thermal stresses, such as hot gas, with suitable shielding of their supporting structure. In addition to metallic ones, ceramic materials offering high temperature resistance, corrosion resistance and low thermal conductivity are suitable for this purpose.

Ein solcher Hitzeschild geht aus der EP 0 558 540 B1 hervor. Hier wird ein Hitzeschild für die Brennkammer einer Gasturbine mit einer Tragstruktur angegeben, welcher eine Heißseite und eine Kaltseite und eine die Heiß- und Kaltseite verbindende Flanke aufweist. In die Flanke sind Greiflaschen eingebracht, in welche Halter zur Befestigung des Hitzeschilds an der Tragstruktur eingreifen, wobei die Halter die Flanken dabei teilweise übergreifen. Die Tragstruktur weisen Nuten auf. In diese Nuten werden die Halter geschoben. Die Halter sind somit in der Tragstruktur befestigt und umklammern den Hitzeschild dabei teilweise an seinen Flanken. Das Querschnittsprofil ist so ausgeführt, dass das Ende des Halters welches mit der größten Breite ausgeführt ist, in der Nut gehalten wird. Der etwas schmaler ausgeführte Federbereich der Halter kann vom Nutgrund aus zum Aufbringen der Haltevorspannung gebogen werden. Die Halteelemente bleiben hierbei in der Nut verschiebbar, werden aber senkrecht zur Tragstrukturoberfläche formschlüssig gehalten. Dadurch müssen die Halter nicht mehr mit Schrauben an der Tragstruktur befestigt werden. Nachteilig bei dieser Befestigungsweise ist jedoch, dass die Hitzeschilde, welche den Brennkammerinnenraum auskleiden, zur Befestigung an der Tragstruktur immer reihenweise und immer nacheinander befestigt werden müssen (Befestigung in Umfangsrichtung). Das bedeutet, dass im Fall eines zum Austausch führenden Befundes am Hitzeschild, dieser nicht einzeln ausgetauscht werden kann. Vielmehr muss eine Kette von Hitzeschilden -ausgehend von einer Montagestartposition bis zum auszutauschenden Hitzeschild demontiert werden, wobei die Gefahr eines Demontageschadens besteht. Dies stellt zum einen hohen Arbeitsaufwand und zum anderen hohe Materialkosten durch den Austausch der erst bei der Demontage geschädigten Hitzeschilde, aber auch durch die längere Arbeitszeit dar.Such a heat shield goes out of the EP 0 558 540 B1 out. Here, a heat shield for the combustion chamber of a gas turbine with a support structure is given, which has a hot side and a cold side and an edge connecting the hot and cold side. In the flank gripping tabs are introduced, in which holder engage for attachment of the heat shield to the support structure, the holder overlap the flanks partially. The support structure have grooves. The holders are pushed into these grooves. The holders are thus secured in the support structure and thereby partially clasp the heat shield on its flanks. The cross-sectional profile is designed so that the end of the holder which is made with the largest width, is held in the groove. The slightly narrower executed spring portion of the holder can be bent from the groove base for applying the retaining bias. The retaining elements remain displaceable in the groove, but are perpendicular to the support structure surface held positively. As a result, the holders no longer need to be fastened to the support structure with screws. A disadvantage of this method of attachment, however, is that the heat shields, which line the combustion chamber interior, for attachment to the support structure always row by row and always have to be fixed sequentially (attachment in the circumferential direction). This means that in the case of a leading to replacement findings on the heat shield, this can not be replaced individually. Rather, a chain of heat shields -ausgehend to be replaced from a mounting start position to the heat shield to be replaced, with the risk of dismantling damage. This represents on the one hand a high workload and on the other high material costs by replacing the damaged only when disassembled heat shields, but also by the longer working hours.

US 5243801 A beschreibt eine Hitzeschildanordnung umfassend eine Tragstruktur 27 und ein Hitzeschild 40, wobei der Hitzeschild 40 eine auf der Tragstruktur 27 aufliegende Kalteseite 42 und eine der Kalteseite 42 gegenüberliegende Heißeseite 41 aufweist und einer Umfangsseite 43, die die Kalteseite 42 mit der Heißeseite 42 verbindet, wobei in der Umfangsseite 43 des Hitzeschilds 40 eine Aussparung 46 eingebracht ist, wobei eine sich in der Richtung im wesentlichen senkrecht zur Aussparung 46 erstreckende Ausnehmung 47 vorgesehen ist, welche sich von der Aussparung 46 bis zur Kalteseite 42 erstreckt und wobei zur Befestigung des Hitzeschildes 40 an der Tragstruktur 27 ein Befestigungsbolzen 60 in die Ausnehmung 47 eingesetzt ist und wobei der Befestigungsbolzen 60 einen Bolzenkopf 62 aufweist. US 5243801 A describes a heat shield assembly comprising a support structure 27 and a heat shield 40, wherein the heat shield 40 has a resting on the support structure 27 cold side 42 and the cold side 42 opposite hot side 41 and a peripheral side 43 which connects the cold side 42 with the hot side 42, wherein the circumferential side 43 of the heat shield 40 is a recess 46 is introduced, wherein a in the direction substantially perpendicular to the recess 46 extending recess 47 is provided, which extends from the recess 46 to the cold side 42 and wherein for fixing the heat shield 40 to the Supporting structure 27, a fastening bolt 60 is inserted into the recess 47 and wherein the fastening bolt 60 has a bolt head 62.

Aufgabe der Erfindung ist daher die Angabe einer verbesserten Hitzeschildanordnung, die bei Wartung und Montage besonders servicefreundlich ist. Die Hitzeschildanordnung soll in einer Brennkammer für Gasturbinen einsetzbar sein.The object of the invention is therefore to provide an improved heat shield assembly, which is particularly easy to service during maintenance and installation. The heat shield assembly should be usable in a combustion chamber for gas turbines.

Die Aufgabe wird gelöst durch eine Hitzeschildanordnung umfassend eine Tragstruktur und ein Hitzeschild, wobei der Hitzeschild eine auf der Tragstruktur aufliegende Kaltseite und eine der Kaltseite gegenüberliegende Heißseite aufweist und einer Umfangsseite, die die Kaltseite mit der Heißseite verbindet, wobei in die Umfangsseite des Hitzeschilds mindestens eine Aussparung eingebracht ist, wobei eine sich in der Richtung im Wesentlichen senkrecht zur Aussparung erstreckende Ausnehmung vorgesehen ist, welche sich von der Aussparung bis zur Kaltseite erstreckt und wobei zur Befestigung des Hitzeschilds an der Tragstruktur ein Befestigungsbolzen in die Ausnehmung eingesetzt ist.The object is achieved by a heat shield arrangement comprising a support structure and a heat shield, the heat shield having a cold side resting on the support structure and a hot side opposite the cold side, and a peripheral side connecting the cold side to the hot side, wherein at least one of the peripheral sides of the heat shield Recess is introduced, wherein a recess extending in the direction substantially perpendicular to the recess is provided, which extends from the recess to the cold side and wherein a fastening bolt is inserted into the recess for attachment of the heat shield to the support structure.

Der Erfindung liegt die Erkenntnis zugrunde, dass kaltwandseitig eine Ausnehmung in den Hitzeschild eingebracht werden kann, ohne dass eine merkliche Schwächung des Hitzeschilds hinsichtlich verkürzter Lebensdauer verursacht wird. Dafür wird in die Umfangsseite mindestens eine Aussparung eingebracht. Ausgehend von dieser Aussparung wird eine Ausnehmung eingebracht. Diese erstreckt sich von der Aussparung bis zur Kaltseite, das heißt bis zur Tragstruktur. In diese Ausnehmung wird ein Befestigungsbolzen eingebracht. Mittels dieses Befestigungsbolzens wird der Hitzeschild an der Tragstruktur befestigt. Der Befestigungsbolzen im Inneren des Hitzeschilds und der Tragstruktur ist somit von außen zugänglich. Mittels geeigneten Werkzeugs, welches beispielsweise in die Spalte benachbarter Hitzeschilde eingeführt wird oder durch beispielsweise ein über die Ausnehmung fluchtendes Loch im Hitzeschild, ist der Bolzen somit brennkammerinnenseitig zugänglich und von der Tragstruktur lösbar. Der Hitzeschild ist damit einzeln aus einer Kette von Hitzeschilden lösbar. Somit ist es nicht mehr notwendig für den Austausch eines einzelnen Hitzeschilds eine ganze Kette von Hitzeschilden zu demontieren, sondern kann gezielt den auszutauschenden Hitzeschild de- und einen neuen Hitzschild wieder montieren. Dadurch ist zum einen die Wartung schneller und auch einfacher. Zum anderen werden Kosten gespart, da hier nur der befundbehaftete Hitzeschild ersetzt wird. Die Gefahr der Beschädigung intakter Hitzeschilde bei dem Austausch wird vermieden. Im Vergleich zu den Hitzeschilden im Stand der Technik ergibt sich zudem der Vorteil der Kostenreduktion bei der Neufertigung durch Wegfall der Steinhalternuten.The invention is based on the finding that a recess can be introduced into the heat shield on the cold wall side, without causing a noticeable weakening of the heat shield with regard to shortened service life. Therefore At least one recess is introduced into the peripheral side. Starting from this recess, a recess is introduced. This extends from the recess to the cold side, that is to the support structure. In this recess, a fastening bolt is introduced. By means of this fastening bolt, the heat shield is attached to the support structure. The fastening bolt in the interior of the heat shield and the support structure is thus accessible from the outside. By means of suitable tool, which is introduced, for example, in the column of adjacent heat shields or by, for example, a recess in the aligned hole in the heat shield, the bolt is thus combustion chamber inside accessible and detachable from the support structure. The heat shield is thus individually solvable from a chain of heat shields. Thus, it is no longer necessary to disassemble a whole chain of heat shields for the replacement of a single heat shield, but can specifically replace the heat shield to be replaced and a new heat shield again. This makes maintenance faster and easier. On the other hand, costs are saved, as only the health-related heat shield is replaced. The risk of damaging intact heat shields during replacement is avoided. Compared to the heat shields in the prior art, there is also the advantage of cost reduction in the new production by eliminating the Steinhalternuten.

Der Befestigungsbolzen weist einen Bolzenkopf auf. Dieser drückt das Hitzschild auf die Tragstruktur.The fastening bolt has a bolt head. This pushes the heat shield on the support structure.

Erfindungsgemäß umfasst der Befestigungsbolzen ein Halteblech. Dadurch wird der direkte Kontakt des Bolzenkopfs mit dem Hitzeschild vermieden. Der auftretende Druck mittels dem der Hitzeschild an der Tragstruktur fest gespannt ist, wird so gleichmäßig durch das Halteblech auf den Hitzeschild übertragen. Weiterhin dient es als Abstandshalter zum benachbarten Hitzeschild. Der Befestigungsbolzen ist somit auch verrutschsicher in der Ausnehmung eingespannt.According to the invention, the fastening bolt comprises a holding plate. As a result, the direct contact of the bolt head is avoided with the heat shield. The pressure occurring by means of which the heat shield is clamped tightly to the support structure is transmitted as uniformly through the retaining plate to the heat shield. Furthermore, it serves as a spacer to the adjacent heat shield. The fastening bolt is thus also secured against slipping in the recess.

Bevorzugt ist das Halteblech des Befestigungsbolzens mittels wenigstens einer Kühlöffnung gekühlt. Die Haltebleche können von der Tragstruktur aus mit gezielten Kühlluftstrahlen oder Kühlmittelströmen gekühlt werden. Dabei wird nicht nur das Halteblech gekühlt, sondern auch ein Eintritt von Heißgas in die Spalten benachbarter Hitzeschilde verhindert.Preferably, the retaining plate of the fastening bolt is cooled by means of at least one cooling opening. The retaining plates can be cooled by the support structure with targeted cooling air jets or coolant streams. In this case, not only the retaining plate is cooled, but also prevents entry of hot gas into the gaps of adjacent heat shields.

Bevorzugt weist der Hitzeschild an der Umfangseite zwei gegenüberliegende Haltebleche zum befestigen des Hitzeschilds an der Tragstruktur auf. Dabei umklammern diese zwei Haltebleche die Umfangsseite teilweise in Richtung von der Kalt- zu der Heißseite. Die Haltebleche sind zur Befestigung des Hitzeschilds an der Tragstruktur dabei in die Aussparung eingesteckt. Bevorzugt weist dabei bei einer zugewandten Seite zweier benachbarter Hitzeschilde nur ein Halteblech ein Langloch auf. Bei zwei angrenzenden Halteblechen ist damit nur eines mit dem erfindungsgemäßen Befestigungsbolzen in der erfindungsgemäßen Ausnehmung ausgestaltet. Das andere Halteblech kann beispielsweise wie im Stand der Technik an der Tragstruktur befestigt sein. Dadurch wird zum einen das Hitzeschild nur mit einer Ausnehmung versehen, was für die Beanspruchbarkeit des Hitzeschilds von Vorteil ist, da die thermische Dehnung des Hitzeschilds nicht behindert ist. Bei einer Kette von nebeneinander angebrachten Hitzeschilden ist es vorteilhaft die Befestigungsweise alternierend einmal nach dem Stand der Technik und anschließend gemäß der Erfindung auszuführen. Somit weist vorteilhafterweise eine Hitzeschildanordnung immer eine Befestigung nach dem Stand der Technik und eine Befestigung gemäß der Erfindung auf. Bei zwei benachbarten Hitzeschildanordnungen weist die ihnen gemeinsame Seite vorteilhafterweise daher unterschiedliche Befestigungen auf.Preferably, the heat shield on the peripheral side on two opposite retaining plates for attaching the heat shield to the support structure. In the process, these two retaining plates partially surround the peripheral side in the direction from the cold side to the hot side. The retaining plates are plugged into the recess for fastening the heat shield to the support structure. Preferably, only one retaining plate has a slot on a facing side of two adjacent heat shields. In the case of two adjacent retaining plates, only one is thus configured with the fastening bolt according to the invention in the recess according to the invention. The other retaining plate may for example be attached to the support structure as in the prior art. As a result, on the one hand, the heat shield is provided with only one recess, which is advantageous for the resistance of the heat shield, since the thermal expansion of the heat shield is not hindered. In a chain of heat shields mounted side by side, it is advantageous to carry out the fastening manner alternately once according to the prior art and then according to the invention. Thus, advantageously, a heat shield assembly always has a prior art fastener and a fastener according to the invention. In the case of two adjacent heat shield arrangements, their common side therefore advantageously has different fastenings.

Vorteilhafterweise sind zudem in der Tragstruktur federnd fixierte Schrauben angebracht. Diese pressen das Halteblech anschließend auf eine Vorspannung. Bei der Montage können Befestigungsbolzen und Halteblech seitlich in den Hitzeschild eingebracht werden.Advantageously, resiliently fixed screws are also mounted in the support structure. These then press the retaining plate to a bias. During assembly, fastening bolts and retaining plate can be inserted laterally into the heat shield.

Bevorzugt ist der Befestigungsbolzen eine Schraubenhalterung. Dazu ist in oder an der Tragstruktur ein Gewinde vorgesehen. Zur Befestigung wird die Schraube angezogen, das heißt eine Spannung auf den Hitzeschild ausgeübt.Preferably, the fastening bolt is a screw holder. For this purpose, a thread is provided in or on the support structure. To attach the screw is tightened, that is, a tension exerted on the heat shield.

In bevorzugter Ausgestaltung ist der Bolzenkopf zumindest teilweise in der Aussparung eingebracht. Dies hat den Vorteil, dass der Bolzenkopf in der Aussparung gegen beispielsweise Heißgas weitgehend geschützt ist. Zudem wird die Kraft die den Bolzenkopf gegen den Hitzeschild presst, auf den Hitzeschild besser übertragen.In a preferred embodiment, the bolt head is at least partially inserted in the recess. This has the advantage that the bolt head is largely protected in the recess against, for example hot gas. In addition, the force that presses the bolt head against the heat shield, transferred to the heat shield better.

In bevorzugter Ausgestaltung ist der Befestigungsbolzen gefedert. Durch eine Federung des Befestigungsbolzens kann das Drehmoment des Befestigungsbolzens gezielter eingestellt werden.In a preferred embodiment, the fastening bolt is sprung. By a suspension of the fastening bolt, the torque of the fastening bolt can be adjusted more targeted.

Bevorzugt ist die Aussparung mittig in der Umfangsseite eingebracht. Eine mittige Anbringung der Aussparung erhöht die Beanspruchbarkeit des Hitzeschilds in Bezug auf Rissbildung und Bruch. Wird die Umfangsseite durch die Aussparung in zwei sehr unterschiedliche Hälften aufgeteilt, so können infolge der geringeren Materialstärke in der dünneren Hälfte sehr viel leichter Brüche und Risse entstehen.Preferably, the recess is centrally inserted in the peripheral side. A central attachment of the recess increases the resistance of the heat shield with respect to cracking and breakage. If the peripheral side is divided by the recess into two very different halves, fractures and cracks can be created much more easily due to the smaller material thickness in the thinner half.

Bevorzugt ist die Aussparung als eine Längsnut ausgestaltet. Diese lässt sich fertigungstechnisch leicht realisieren.Preferably, the recess is designed as a longitudinal groove. This can be easily realized in terms of manufacturing technology.

Alternativ oder aber auch alternierend ist die Aussparung als eine Haltetasche ausgestaltet. Damit ist nicht nur die vertikale Fixierung des Hitzeschilds, sondern auch eine axiale Fixierung möglich. Damit ist eine Erhöhung der Festigkeit des Hitzeschilds im Bereich der Halterung im Vergleich mit der Ausführung zu der Längsnut gegeben. Die Haltetasche fokussiert zudem das Kühlmittel auf die Halteelemente und vermindert damit den Kühlmittelbedarf. Zudem kann hier die Nacharbeit reduziert werden. Weiterhin kann dies eine weitere Einsparung von Kühlmittel bewirken, da dies als Ersatz für die im Stand der Technik aufgeführten Abschluss-Hitzeschilde eingesetzt werden kann.Alternatively or alternatively, the recess is designed as a holding pocket. This not only the vertical fixation of the heat shield, but also an axial fixation is possible. Thus, an increase in the strength of the heat shield in the region of the holder is given in comparison with the execution of the longitudinal groove. The holding pocket also focuses the coolant on the holding elements and thus reduces the coolant requirement. In addition, the rework can be reduced here. Furthermore, this can cause a further saving of coolant, since this is a substitute for the used in the prior art final heat shields can be used.

Bevorzugt ist von der Heißseite her im Hitzeschild ein zum Bolzenkopf fluchtendes Loch angebracht. Mittels dieses Lochs ist der Befestigungsbolzen von der Heißseite, das heißt brennkammerinnenseitig, her lösbar.Preferably, a hole aligned with the bolt head is mounted in the heat shield from the hot side. By means of this hole, the fastening bolt from the hot side, that is inside the combustion chamber, forth solvable.

Vorteilhafterweise ist der Befestigungsbolzen von innen luftgekühlt. Dadurch wird zum einen der Befestigungsbolzen durch die Luft selbst gekühlt. Weiterhin wird durch die ausströmende Luft verhindert, dass Heißgas in die Ausnehmung eintritt. Dies wirkt sich lebensdauerverlängernd auf den Befestigungsbolzen aus.Advantageously, the fastening bolt is air-cooled from the inside. As a result, on the one hand, the fastening bolts are cooled by the air itself. Furthermore, it is prevented by the outflowing air that hot gas enters the recess. This has a life-prolonging effect on the fastening bolts.

Bevorzugt weist die Tragstruktur Kühlöffnungen auf. Dadurch wird zum einen der Befestigungsbolzen als auch die Haltebleche mit Kühlluft versorgt. Weiterhin kann beispielsweise durch Prallkühlung der Haltebleche die Kühlung sehr effektiv und gezielt eingesetzt werden, wodurch der Kühlluftverbrauch minimiert wird.Preferably, the support structure has cooling openings. As a result, the fastening bolts and the retaining plates are supplied with cooling air on the one hand. Furthermore, the cooling can be used very effectively and selectively, for example by impingement cooling of the retaining plates, whereby the cooling air consumption is minimized.

Bevorzugt weist wenigstens eine Kühlöffnung auf das Halteblech und bewirkt so eine besonders gute Kühlung.Preferably, at least one cooling opening on the retaining plate and thus causes a particularly good cooling.

Bevorzugt besteht der Hitzeschild aus keramischem Material, insbesondere einer porösen Keramik.The heat shield is preferably made of ceramic material, in particular a porous ceramic.

In bevorzugter Ausgestaltung ist der Befestigungsbolzen aus Metall oder Metalllegierung.In a preferred embodiment, the fastening bolt is made of metal or metal alloy.

Darin zeigt in vereinfachter und nicht maßstäblicher Darstellung:

FIG 1
eine schematische Darstellung einer Gasturbine,
FIG 2
eine erfindungsgemäße Hitzeschildanordnung mit Tragstruktur,
FIG 3
einen Querschnitt einer erfindungsgemäßen Hitze- schildanordnung,
FIG 4
eine Draufsicht einer erfindungsgemäßen Hitze- schildanordnung,
FIG 5
eine erfindungsgemäße Hitzeschildanordnung mit Hal- tetaschen.
It shows in a simplified and not to scale representation:
FIG. 1
a schematic representation of a gas turbine,
FIG. 2
a heat shield arrangement according to the invention with supporting structure,
FIG. 3
a cross section of a heat shield arrangement according to the invention,
FIG. 4
a top view of a heat shield arrangement according to the invention,
FIG. 5
a heat shield arrangement according to the invention with retaining pockets.

Gleiche Teile sind in allen Figuren mit denselben Bezugszeichen versehen.Identical parts are provided with the same reference numerals in all figures.

Die Gasturbine 1 gemäß FIG 1 weist einen Verdichter 2 für Verbrennungsluft, eine Brennkammer 4 sowie eine Turbine 6 zum Antrieb des Verdichters 2 und eines nicht näher dargestellten Generators oder einer Arbeitsmaschine, Im Verdichter 4 wird zugeführte Luft L verdichtet. Dazu sind die Turbine 6 und der Verdichter 2 auf einer gemeinsamen, auch als Turbinenläufer bezeichneten Turbinenwelle 8 angeordnet, mit der auch der Generator bzw. die Arbeitsmaschine verbunden ist, und die um ihre Mittelachse drehbar gelagert ist. Die Turbine 6 weist eine Anzahl von mit der Turbinenwelle 8 verbundenen, rotierbaren Laufschaufeln 12 auf. Die Laufschaufeln 12 sind kranzförmig an der Turbinenwelle 8 angeordnet und bilden somit eine Anzahl von Laufschaufelreihen. Weiterhin umfasst die Turbine 6 eine Anzahl von feststehenden Leitschaufeln 14. Die Laufschaufeln 12 dienen zum Antrieb der Turbinenwelle 8 durch Impulsübertrag vom die Turbine 6 durchströmenden heißen Medium, dem Arbeitsmedium, beispielsweise des Heißgases M. Die Leitschaufeln 14 dienen hingegen zur Strömungsführung des Arbeitsmediums beispielsweise des Heißgases M.The gas turbine 1 according to FIG. 1 has a compressor 2 for combustion air, a combustion chamber 4 and a turbine 6 for driving the compressor 2 and a generator or a work machine, not shown, in the compressor 4, compressed air L is compressed. For this purpose, the turbine 6 and the compressor 2 are arranged on a common, also called turbine rotor turbine shaft 8, with which the generator or the working machine is connected, and which is rotatably mounted about its central axis. The turbine 6 has a number of rotatable blades 12 connected to the turbine shaft 8. The blades 12 are arranged in a ring on the turbine shaft 8 and thus form a number of blade rows. The rotor blades 6 serve to drive the turbine shaft 8 by momentum transfer from the hot medium flowing through the turbine 6, the working medium, for example the hot gas M. The guide vanes 14, on the other hand, serve to guide the flow of the working medium, for example the Hot gases M.

Das in der Brennkammer 4 beispielsweise entstehende Heißgas M strömt in strömungsrichtung S von der Brennkammer 4 zu der Turbine 6. Dafür ist die Brennkammer 4 mit Hitzeschilden ausgestaltet.In the combustion chamber 4, for example, resulting hot gas M flows in the flow direction S from the combustion chamber 4 to the turbine 6. For the combustion chamber 4 is designed with heat shields.

FIG 2 und 3 zeigen die Hitzeschildanordnung 20 mit einem Hitzeschild 22 und einer Tragstruktur 28 auf einmal von schräg oben als auch im Querschnitt. Daneben (FIG 2) ist ein Hitzeschild mit einem Halteblech 48 nach dem Stand der Technik dargestellt. Der Hitzeschild 22 weist dabei eine Heißseite 24, eine Kaltseite 26 und eine Umfangsseite 30 auf. Eine Aussparung 34 befindet sich vorteilhafterweise ungefähr in der Mitte der Umfangsseite 30. Eine Ausnehmung 32 erstreckt sich von der Aussparung 34 bis zu der Kaltseite 26 des Hitzeschilds 22. In diese Ausnehmung 32 ist ein Befestigungsbolzen 36 hier als Schraubenhalterung 36 ausgebildet darstellt, eingebracht. Die Schraubenhalterung 36 weist dabei einen Bolzenkopf 38 auf. FIGS. 2 and 3 show the heat shield assembly 20 with a heat shield 22 and a support structure 28 at a time from obliquely above and in cross section. Besides ( FIG. 2 ) a heat shield is shown with a retaining plate 48 according to the prior art. The heat shield 22 has a hot side 24, a cold side 26 and a peripheral side 30. A recess 34 is located advantageously approximately in the middle of the peripheral side 30. A recess 32 extends from the recess 34 to the cold side 26 of the heat shield 22. In this recess 32 is a fastening bolt 36 is here designed as a screw holder 36, introduced. The screw holder 36 has a bolt head 38.

Erfindungsgemäß ist ein Halteblech 40 dergestalt angebracht, dass die Ausdehnung des Hitzeschilds 22 sowie der Schraubenhalterung 36 möglich ist. Dadurch wird der direkte Kontakt des Kopfs 38 mit dem Hitzeschild 22 in der Aussparung 34 vermieden. Der auftretende Druck mittels dem der Hitzeschild 22 an der Tragstruktur 28 fest gespannt ist, wird so gleichmäßig durch das Halteblech 40 auf den Hitzeschild 22 übertragen. Weiterhin dient es als Abstandshalter zum benachbarten Hitzeschild. Damit ist eine verrutschsichere Befestigung gewährleitstet.According to the invention, a holding plate 40 is attached in such a way that the expansion of the heat shield 22 and the screw holder 36 is possible. As a result, the direct contact of the head 38 with the heat shield 22 in the recess 34 is avoided. The occurring pressure by means of which the heat shield 22 is firmly clamped to the support structure 28 is transmitted as evenly through the retaining plate 40 to the heat shield 22. Furthermore, it serves as a spacer to the adjacent heat shield. This ensures a slip-proof fastening.

In oder an der Tragstruktur 28 ist eine Verschraubung 42 mit Innengewinde angebracht. In die Verschraubung 42 ist nun die Schraubenhalterung 36 angebracht. Somit werden Hitzeschild 22 und Tragstruktur 28 zusammengehalten.In or on the support structure 28, a screw 42 is mounted with internal thread. In the screw 42 now the screw holder 36 is attached. Thus, heat shield 22 and support structure 28 are held together.

Vorteilhafterweise ist bei dem benachbarten, angrenzenden Hitzeschild 22 ein Halteblech 48 nach dem Stand der Technik 48 vorgesehen, so dass sich nun das Halteblech 48 nach dem Stand der Technik und die erfindungsgemäße Befestigung der Hitzeschildanordnung 20 gegenüberliegen. Dafür muss die Verschraubung 42 mit einer Abflachung 54 an der Oberseite der Verschraubung 42 versehen sein. Dadurch können sich die Hitzeschilde 22 sich bei Belastung ausdehnen. Bei dieser Art der Ausführung wird so eine der Ausnehmung 32 bei dem Hitzeschild 22 eingespart. Die Hitzeschildanordnung kann jedoch auch mehrere Befestigungen gemäß der Erfindung aufweisen. Auch dann ist eine direkte Demontage der Hitzeschilde gewährleistet.Advantageously, in the adjacent adjacent heat shield 22, a holding plate 48 is provided according to the prior art 48, so that now the holding plate 48 according to the prior art and the attachment according to the invention of the heat shield assembly 20 are opposite. For the screw 42 must be provided with a flattening 54 at the top of the screw 42. As a result, the heat shields 22 can expand under load. In this type of Execution is thus saved a recess 32 in the heat shield 22. However, the heat shield assembly may also include a plurality of fasteners according to the invention. Even then, a direct disassembly of the heat shields is guaranteed.

Bei zwei angrenzenden Halteblechen 40 ist weiterhin ein Abstandshalter 50 vorgesehen. Dies ermöglicht die Ausdehnung des Hitzeschilds. An der Tragstruktur 28 sind federnd fixierte Schrauben vorgesehen (nicht gezeigt) mit denen das Halteblech 40 in die Aussparung 34 auf eine notwendige Vorspannung gepresst wird. Bei der Montage kann die Schraubenhalterung 36 mit Bolzenkopf 38 und Halteblech 40 seitlich in die Aussparung 34 eingesetzt werden. Der Hitzeschild 22 mit Schraubenhalterung 36, Bolzenkopf 38 und Halteblech 40 kann anschließend in die Position auf der Tragstruktur 28 aufgesetzt werden. Auch die Schraubenhalterung 36 und deren Anbringung im Halteblech 40 erfolgt so, dass eine Ausdehnung des Hitzeschilds 22 ermöglicht wird. Dies ermöglicht im Vergleich zum Stand der Technik eine sehr einfache und schnelle Montage der Hitzeschilde, da diese von der Brennkammerinnenseite zugänglich sind.With two adjacent retaining plates 40, a spacer 50 is further provided. This allows the expansion of the heat shield. On the support structure 28 resiliently fixed screws are provided (not shown) with which the retaining plate 40 is pressed into the recess 34 to a necessary bias. During assembly, the screw holder 36 with bolt head 38 and retaining plate 40 can be inserted laterally into the recess 34. The heat shield 22 with screw holder 36, bolt head 38 and retaining plate 40 can then be placed in the position on the support structure 28. The screw holder 36 and its attachment in the holding plate 40 is carried out so that an expansion of the heat shield 22 is made possible. This allows in comparison to the prior art, a very simple and quick installation of the heat shields, since they are accessible from the combustion chamber inside.

FIG 4 zeigt die Draufsicht einer erfindungsgemäßen Hitzeschildanordnung 20 mit einem zur Heißseite 24 hin fluchtenden Loch 44. Durch dieses kann der Bolzenkopf 38 brennkammerinnenseitig ohne großen Aufwand erreicht werden. Der Bolzenkopf 36 und die Schraubenhalterung 36 können so durch verschrauben mit der Verschraubung 42 einfach an der Tragstruktur 28 demontiert bzw. montiert werden. Dieses ermöglicht eine einfache Montage und Demontage des gesamten Hitzeschilds 22 ohne hierfür eine komplette Kette an Hitzeschilden 22 zu entfernen. Somit können intakte Hitzeschilde 22 in der Brennkammer belassen werden und werden nicht durch unnötigen Ein- und Ausbau gefährdet. FIG. 4 shows the top view of a heat shield assembly 20 according to the invention with a hot side 24 towards aligned hole 44. Through this, the bolt head 38 can be achieved inside the combustion chamber without great effort. The bolt head 36 and the screw holder 36 can be easily disassembled or screwed to the support structure 28 by screwing with the screw 42. This allows easy assembly and disassembly of the entire heat shield 22 without removing a complete chain of heat shields 22 for this purpose. Thus, intact heat shields 22 can be left in the combustion chamber and are not endangered by unnecessary installation and removal.

Für den Befestigungsbolzen 36 bzw. die Schraubenhalterung 36 kann beispielsweise ein Tellerfederpaket 52 verwendet werden. Dadurch ist ein gezieltes einstellen des Drehmoments möglich. Zur axialen Fixierung des Hitzeschilds 22 kann die Aussparung 34 als Haltetasche 60 ausgebildet sein, wie dies in FIG 5 dargestellt ist. Damit ist eine verbesserte axiale Fixierung möglich. Die Haltetasche 60 fokussiert zudem das Kühlmittel auf die Halteelemente 40 und vermindert damit den Kühlmittelbedarf.For example, a disc spring package 52 can be used for the fastening bolt 36 or the screw holder 36. As a result, a targeted adjustment of the torque is possible. For axially fixing the heat shield 22, the recess 34 may be formed as a holding pocket 60, as in FIG. 5 is shown. For an improved axial fixation is possible. The holding pocket 60 also focuses the coolant on the holding elements 40 and thus reduces the coolant requirement.

Durch die erfindungsgemäße Hitzeschildanordnung kann nun an jeder Stelle beispielsweise einer Brennkammer ein auszutauschendes Hitzeschild demontiert werden, ohne dass weiter intakte Hitzeschilde ausgebaut werden müssen. In die entstehende Lücke kann ein neuer Hitzeschild eingesetzt werden und mit der erforderlichen Haltekraft befestigt werden. Es müssen daher nur auszutauschende Hitzeschilde demontiert und dort neue eingebaut werden. Dadurch verringert sich die dafür erforderliche Zeit sowie das Risiko intakte Hitzeschilde während eines Ausbaus zu beschädigen, wodurch sich auch weiter die Kosten für eine Wartung reduzieren.By means of the heat shield arrangement according to the invention, a heat shield to be exchanged can now be dismantled at any point, for example, of a combustion chamber, without it being necessary to further remove intact heat shields. In the resulting gap, a new heat shield can be used and secured with the required holding power. It must therefore only disassembled heat shields dismantled and installed there new. This reduces the time required and the risk of damaging intact heat shields during removal, further reducing the cost of maintenance.

Claims (19)

  1. Heat shield arrangement (20), comprising a carrying structure (28) and a heat shield (22), the heat shield (22) having a cold side (26) lying on the carrying structure (28) and a hot side (24) lying opposite the cold side (26), and with a circumferential side (30) which connects the cold side (26) to the hot side, at least one clearance (34) being introduced in the circumferential side (30) of the heat shield (22), there being provided a recess (32) which extends in the direction essentially perpendicular to the clearance (34) and it extends from the clearance (34) as far as the cold side (26), a fastening bolt (36) being inserted into the recess (32) in order to fasten the heat shield (22) to the carrying structure (28), and the fastening bolt (36) having a bolt head (38), characterized in that the fastening bolt (36) comprises a holding plate (40).
  2. Heat shield arrangement (20) according to Claim 1, characterized in that the holding plate (40) of the fastening bolt (36) is cooled by means of at least one cooling orifice.
  3. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the heat shield (22) has on the circumferential side (30) two holding plates (40) lying opposite for fastening the heat shield (22) to the carrying structure (28).
  4. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the holding plate (40) has at least one long hole.
  5. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the bolt head (38) is introduced at least partially in the clearance (34).
  6. Heat shield arrangement (20) according to one of the preceding claims, characterized in that resiliently fixed screws are introduced in the carrying structure.
  7. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the fastening bolt (36) is a screw holder (36).
  8. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the fastening bolt (36) is sprung.
  9. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the clearance (34) is introduced centrally in the circumferential side (30).
  10. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the clearance (34) is configured as a longitudinal groove.
  11. Heat shield arrangement (20) according to one of Claims 2-10, characterized in that the clearance (34) is configured as a holding pocket (60).
  12. Heat shield arrangement (20) according to one of the preceding claims, characterized in that a hole (44) aligned with the bolt head (38) is formed in the heat shield (22) from the hot side (24).
  13. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the fastening bolt (36) is air-cooled from inside.
  14. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the carrying structure (28) has cooling orifices.
  15. Heat shield arrangement (20) according to Claim 14, characterized in that at least one cooling orifice points towards the holding plate (40).
  16. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the heat shield consists of ceramic material, in particular of porous engineering ceramic.
  17. Heat shield arrangement (20) according to one of the preceding claims, characterized in that the fastening bolt (36) is made from metal or metal alloy.
  18. Combustion chamber (4) having a heat shield arrangement (20) according to one of the preceding claims.
  19. Gas turbine (1) having a combustion chamber (4) according to Claim 18.
EP06015431A 2006-07-25 2006-07-25 Heat shield arrangement, particularly for a gas turbine Active EP1884713B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE502006008609T DE502006008609D1 (en) 2006-07-25 2006-07-25 Heat shield arrangement, in particular for a gas turbine
EP06015431A EP1884713B1 (en) 2006-07-25 2006-07-25 Heat shield arrangement, particularly for a gas turbine
AT06015431T ATE493617T1 (en) 2006-07-25 2006-07-25 HEAT SHIELD ARRANGEMENT, PARTICULARLY FOR A GAS TURBINE
ES06015431T ES2356914T3 (en) 2006-07-25 2006-07-25 DISPLAY OF HEATING DISPLAY, IN PARTICULAR FOR A GAS TURBINE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06015431A EP1884713B1 (en) 2006-07-25 2006-07-25 Heat shield arrangement, particularly for a gas turbine

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EP1884713A1 EP1884713A1 (en) 2008-02-06
EP1884713B1 true EP1884713B1 (en) 2010-12-29

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AT (1) ATE493617T1 (en)
DE (1) DE502006008609D1 (en)
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WO2014207207A1 (en) * 2013-06-27 2014-12-31 Siemens Aktiengesellschaft Securing a heat shield block to a support structure, and heat shield
CN107003000A (en) * 2014-09-29 2017-08-01 西门子股份公司 Heat insulating element for the heat shield of combustion chamber
US20190264923A1 (en) * 2016-11-11 2019-08-29 Kawasaki Jukogyo Kabushiki Kaisha Combustor liner
WO2020200568A1 (en) 2019-04-03 2020-10-08 Siemens Aktiengesellschaft Heat-shield tile having a damping function
DE102019219845A1 (en) * 2019-12-17 2021-06-17 Siemens Aktiengesellschaft Heat shield tile for a combustion chamber and combustion chamber

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EP2423596A1 (en) * 2010-08-27 2012-02-29 Siemens Aktiengesellschaft Heat shield element
DE102017212575A1 (en) * 2017-07-21 2019-01-24 Siemens Aktiengesellschaft Method for increasing the power of a gas turbine

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WO2014207207A1 (en) * 2013-06-27 2014-12-31 Siemens Aktiengesellschaft Securing a heat shield block to a support structure, and heat shield
CN105339738A (en) * 2013-06-27 2016-02-17 西门子股份公司 Securing a heat shield block to a support structure, and heat shield
CN105339738B (en) * 2013-06-27 2017-07-04 西门子股份公司 Fasten heat shield block to supporting construction, and heat shield
CN107003000A (en) * 2014-09-29 2017-08-01 西门子股份公司 Heat insulating element for the heat shield of combustion chamber
US20190264923A1 (en) * 2016-11-11 2019-08-29 Kawasaki Jukogyo Kabushiki Kaisha Combustor liner
US11543132B2 (en) * 2016-11-11 2023-01-03 Kawasaki Jukogyo Kabushiki Kaisha Combustor liner
WO2020200568A1 (en) 2019-04-03 2020-10-08 Siemens Aktiengesellschaft Heat-shield tile having a damping function
DE102019219845A1 (en) * 2019-12-17 2021-06-17 Siemens Aktiengesellschaft Heat shield tile for a combustion chamber and combustion chamber

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EP1884713A1 (en) 2008-02-06
ATE493617T1 (en) 2011-01-15
ES2356914T3 (en) 2011-04-14

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