EP2883000A2 - Device for cooling a supporting structure of a heat shield, and heat shield - Google Patents

Device for cooling a supporting structure of a heat shield, and heat shield

Info

Publication number
EP2883000A2
EP2883000A2 EP13763244.4A EP13763244A EP2883000A2 EP 2883000 A2 EP2883000 A2 EP 2883000A2 EP 13763244 A EP13763244 A EP 13763244A EP 2883000 A2 EP2883000 A2 EP 2883000A2
Authority
EP
European Patent Office
Prior art keywords
heat shield
support structure
cooling air
cooling
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13763244.4A
Other languages
German (de)
French (fr)
Other versions
EP2883000B1 (en
Inventor
Sabine GRENDEL
Andre Kluge
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
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to EP13763244.4A priority Critical patent/EP2883000B1/en
Publication of EP2883000A2 publication Critical patent/EP2883000A2/en
Application granted granted Critical
Publication of EP2883000B1 publication Critical patent/EP2883000B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F23M5/04—Supports for linings
    • 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
    • F23M5/08—Cooling thereof; Tube walls
    • F23M5/085—Cooling thereof; Tube walls using air or other gas as the cooling medium
    • 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
    • F23R3/005—Combined with pressure or heat exchangers
    • 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
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/05002—Means for accommodate thermal expansion of the wall liner
    • 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
    • F23M5/08—Cooling thereof; Tube walls
    • 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
    • F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
    • F23R3/60—Support structures; Attaching or mounting means

Definitions

  • the invention relates to a device for cooling the support structure of a heat shield and to a heat shield, in particular to a heat shield for a combustion chamber of a gas turbine.
  • the invention also relates to a combustion chamber and to a gas turbine with such a heat shield.
  • heat shields are used, which have to withstand hot gases of 1000 to 1600 degrees Celsius.
  • gas turbines such as those used in power-generating power plants and in aircraft engines, have correspondingly large surfaces to be shielded by heat shields in the interior of the combustion chambers.
  • the heat shield must be composed of a plurality of individual, generally ceramic heat shield bricks, spaced apart from each other with a sufficient gap to a support structure. This gap provides the heat shield elements with sufficient space for thermal expansion.
  • cooling air is introduced as a countermeasure by the gaps in the direction of the combustion chamber
  • a generic heat shield thus comprises a support structure and a number of heat shield bricks which are releasably secured to the support structure by means of stone holders, each heat shield brick facing one of the support structure
  • Each of the stone holders has at least one holding section for fastening on a heat shield stone and attachable to the tag structure attachment portion.
  • at least one cooling air passage is provided in the support structure.
  • circular circumferential and parallel fastening grooves may be provided in the support structure.
  • the stone holder are inserted in this case with their attachment sections one after the other in the mounting grooves, with nachumblede
  • Stone holder block the position of previously positioned stone holder.
  • a circular encircling row of heat shield bricks may be secured to the support structure within a combustor of a gas turbine.
  • EP 1 701 095 A1 discloses a heat shield of a combustion chamber of a gas turbine having a support structure and a number of heat shield bricks arranged detachably on the support structure.
  • the heat shield elements are arranged on the supporting structure, leaving expansion gaps on each support structure, each heat shield brick having a cold side facing the support structure and a hot side opposite the cold side and capable of being acted upon by a hot medium.
  • the heat shield bricks are resiliently fastened to the support structure with four metallic stone holders each.
  • each stone holder comprises a holding section in the form of a gripping section and a fixing section.
  • each heat shield brick side retaining grooves are introduced on two opposite circumferential sides, so that for holding the heat shield brick, the gripping portions of the stone holder opposite can engage in the retaining grooves.
  • the stone holders which are fastened on the heat shield brick opposite to one another, are guided with their fastening portion in a fastening groove extending below the heat shield brick in the support structure.
  • the gripping portions of the metallic stone holder are cooled.
  • the stone holders in the area of the holding section and in the holding bars of the heat shield bricks must be opened. introduced, which are aligned with a cooling air hole arranged in the support structure, so that cooling air from the cooling air hole flowing in direct line on a cold side of the gripping portion bounces.
  • a device for cooling the support structure of a heat shield of the type mentioned above in that the device comprises a longitudinal axis and a cooling air duct, wherein the device with the longitudinal axis perpendicular to the surface of the support structure on the support structure can be arranged.
  • the cooling air duct extends from an end of the device facing the support structure and comprises at least one exit channel downstream.
  • the at least one exit channel exits the device laterally with respect to the longitudinal axis.
  • the device can be arranged on the support structure such that the cooling air duct corresponds to at least one cooling air passage arranged in the support structure.
  • cooling air is thus in the intermediate space between the cold side of the heat shield brick and the support structure when arranged on the support structure heat shield bricks
  • the cooling air can be introduced into the intermediate space by means of the device from an elevated position above the support structure.
  • cooling air duct corresponds to at least one cooling air passage arranged in the support structure
  • the cooling air duct corresponds to at least one cooling air passage arranged in the support structure
  • the cooling air passage can be, for example, a cooling air bore arranged in the support structure, into which the device can be screwed with its end facing the support structure.
  • the longitudinal axis of the device need not be identical to a longitudinal axis defined by the shape of the body. It is fictitious and, with the device arranged on the support structure, extends through the fastening region of the device and perpendicular to the surface of the support structure. Surface irregularities are not to be considered here.
  • the device for cooling the support structure can be arranged on the support structure also conceptually includes devices which are partially secured in the support structure, or which are arranged within a recess extending in the support structure.
  • the device is a threaded pin with integrated cooling air duct.
  • This development of the invention has a particularly simple structure and is thus associated with low production costs.
  • the at least one output channel extends radially to the longitudinal axis.
  • the cooling air emerging from the outlet channel thus flows parallel to the support structure from an elevated position into the gap between the heat shield bricks and the support structure. This allows the cooling of a wide range of the supporting structure and at the same time avoids impact cooling of the heat shield stones. It may also be considered advantageous that the device comprises two opposing output channels.
  • This embodiment of the invention is particularly suitable for cooling a mounting groove in the support structure.
  • the device has four output channels.
  • Another object of the invention is to provide a heat shield of the type mentioned, with which a scaling of the support structure due to hot gas intake can be particularly effectively avoided.
  • the heat shield for protection against hot gases comprises at least one cooling air passage in the support structure, on which a device according to one of claims 1 to 5 is arranged.
  • the device is arranged on the cooling air passage
  • the cooling air passage in this case is to be understood such that the of Device included cooling air passage with the cooling air passage corresponded.
  • the device can be arranged, for example, below the crossing region of two expansion gaps on the support structure. In this area, cooling air can be injected into the respective gap between the cold side of the heat shield brick and the support structure with only one device with a corresponding number of output channels under the four adjacent heat shield bricks.
  • the device is arranged below a heat shield block on the support structure.
  • the term "below a heat shield brick” is to be understood in this case as meaning that the apparatus is arranged in a region of the support structure facing the cold side of the heat shield brick
  • the apparatus can be located below a heat shield brick in the vicinity of a fastening portion of a
  • the laterally emerging output channels can be inclined in the direction of the support structure and be positioned such that the at least one exiting cooling air jet is directed at those structures which hold the stone holders in their attachment.
  • the mounting portions of the stone holder are releasably secured within mounting grooves extending in the support structure and the cooling air passage opens into the groove bottom of the mounting groove.
  • the device is in this case arranged in the groove bottom on the cooling air passage. According to this embodiment of the invention, the device must either be removed or it is arranged in the groove bottom for installing and removing the heat shield bricks, that the stone holders can be pushed over the device through the mounting groove.
  • the device between two attachment portions of the stone holder is arranged substantially centrally under a heat shield brick.
  • the device is located between two attachment portions of two opposing stone holders, which hold a common heat shield brick on opposite side walls of the heat shield brick. In this way, the cooling air emerging from the device can be injected below the heat shield brick without the stone holders blocking the flow path of the cooling air.
  • a cooling air groove runs in the groove bottom of the fastening groove and the device is lowered into the cooling air bore at least at the level of the groove bottom, the outlet channels of the device opening into the cooling air groove.
  • the device according to this embodiment of the invention can be arranged in the cooling air groove such that it does not protrude beyond the groove bottom of the fastening groove.
  • the stone holders can be moved across the device in the mounting groove. This allows for easy installation and removal of the heat shield stones for repair and maintenance purposes.
  • the cooling air groove comprises an outlet at its ends. This allows a fluidically improved outlet of the cooling air from the cooling air groove.
  • the support structure and the device can correspond to one another such that the device for installing and removing the heat shield bricks in the support structure can be lowered.
  • the device may for example be completely screwed into the support structure.
  • the device in two into one another
  • translatable positions can be arranged on the support structure.
  • a first position with the longitudinal axis perpendicular to the support structure surface serves to introduce cooling air and a second position with the longitudinal axis parallel to the surface of the support structure of the sinking of the device.
  • Another object of the invention is to provide a combustion chamber and a gas turbine with at least one combustion chamber, with which a scaling of the support structure due to hot gas intake of a heat shield covered by the combustion chamber can be particularly effectively avoided.
  • the object is achieved in a combustion chamber and a gas turbine of the type mentioned above in that the heat shield is formed according to one of claims 6 to 12.
  • 1 shows a schematic representation of a gas turbine according to the prior art
  • 2 shows schematically a device according to the invention for
  • Figure 4 schematically shows a cross section of an inventive
  • Heat shield with a device arranged on the support structure for cooling the support structure according to a fourth embodiment
  • FIG. 6 shows a schematic representation of the heat shield shown in FIG. 5 in a further sectional view along the plane indicated by the arrows VI-VI in FIG. 5, FIG.
  • FIG. 1 shows a schematic sectional view of a gas turbine 1 according to the prior art.
  • the gas turbine 1 has inside a rotatably mounted about a rotation axis 2 rotor 3 with a shaft 4, which is also referred to as a turbine runner.
  • a turbine runner which is also referred to as a turbine runner.
  • the rotor 3 successively follow an intake housing 6, a compressor 8, a combustion system 9 with a number of combustion chambers 10, each comprising a burner assembly 11 and a housing 12, a turbine 14th and an exhaust housing 15.
  • the housing 12 is lined with a heat shield (not shown) for protection from hot gases.
  • the combustion system 9 communicates with an annular hot gas duct, for example.
  • a plurality of successively connected turbine stages form the turbine 14. Each turbine stage is formed of blade rings.
  • the hot runner of a row formed by vanes 17 is followed by a row formed by buckets 18.
  • the guide vanes 17 are fastened to an inner housing of a stator 19, whereas the moving blades 18 of a row are attached to the rotor 3, for example by means of a turbine disk. Coupled to the rotor 3 is, for example, a generator (not shown).
  • FIG. 2 shows schematically a device 20 according to the invention for cooling a support structure of a heat shield according to a first embodiment in a sectional view.
  • the device 20 has a longitudinal axis 21 and comprises a cooling air channel 22.
  • the cooling air channel 22 extends from one end 23 of the device and comprises downstream two outlet channels 25a and 25b, which laterally exit the device with respect to the longitudinal axis 21 and opposite ⁇ ⁇
  • the device is a threaded pin with a running inside the threaded pin cooling air passage 22.
  • the illustrated device 20 may also be referred to asdemade.
  • the threaded pin has on its lateral surface 26 a thread (not shown).
  • the thread may, for example, in the region of the end 23 extend over the lateral surface 26 or pull to the opposite end 27.
  • the device 20 can be arranged with its end 23 on a support structure of a heat shield. For example, by the cooling grommet is screwed into a provided with an internal thread cooling air bore in the support structure. In this position, cooling air exiting from the cooling air hole can be introduced into the cooling air passage 22, so that the cooling air flows downstream through the output passages 25a, 25b and leaves the cooling boot in the direction indicated by 24a and 24b.
  • FIG. 3 shows a cross section of a device 29 according to the invention for cooling a support structure according to a second exemplary embodiment of the invention.
  • the cross section in this case runs perpendicular to the longitudinal axis 21 at the level of the output channels 30a and 30b.
  • the illustrated device 29 differs from the described in Figure 2demade only by the angle at which exit the output channels 30a and 30b with respect to the longitudinal axis 21 laterally from the device.
  • the output channels extend radially to the longitudinal axis 21 and are arranged opposite one another. Cooling air flowing through the cooling air passage 22 is divided downstream of the output passages 30a and 30b and leaves the cooling boot in the illustrated outflow direction 31a and 31b.
  • FIG. 4 shows a cross section of a device 64 according to the invention for cooling a support structure according to a third exemplary embodiment of the invention.
  • the cross section in this case runs perpendicular to the longitudinal axis 21 at the level of the output channels 66a, 66b, 66c and 66d.
  • the illustrated device 64 differs from the one shown in FIG. only by the number of output channels.
  • the illustrated embodiment comprises four output channels, which extend radially to the longitudinal axis 21 and are arranged in pairs opposite one another. Cooling air flowing through the cooling air passage 22 is divided downstream of the output passages 66a, 66b, 66c, 66d and exits the cooling grate 64 in the illustrated directions 67a, 67b, 67c, 67d.
  • FIG. 5 shows a detail of a heat shield 33 according to the invention with a support structure 34 and a number of heat shield bricks, of which a heat shield brick 35 is shown by way of example in the FIGURE.
  • the heat shield brick 35 has a cold side facing the support structure 34
  • the heat shield brick 35 is fastened to the support structure 34 by means of stone holders 38 and 39.
  • the stone holders 38, 39 are fastened on the one hand with their attachment portions 40, 41 on the support structure 34 and on the other hand engage with their holding portions 42, 43 in retaining grooves 44, 47 on opposite side walls of the heat shield brick 35 a.
  • the heat shield brick 35 which is resiliently held on the support structure 34 in this way, it can act upon exposure to the hot side
  • a device 48 according to the invention for cooling the support structure 34 is arranged below the heat shield block on the support structure 34.
  • the device 48 according to the invention is a threaded pin with a longitudinal axis 21 and a cooling air channel 22. The device 48 can thus also be referred to as a cooling grate 48.
  • the Cooling grommet 48 is arranged with its longitudinal axis 21 perpendicular to the surface 51 of the support structure on the support structure, the cooling grille 48 being screwed into a cooling air passage 50 of the support structure with an end 23 facing the support structure.
  • the cooling air passage 50 is designed as a cooling air hole.
  • the cooling air channel 22 extends from the screwed-in end 23 and comprises downstream two outlet channels 52a, 52b, which emerge laterally from the longitudinal axis 21 from the cooling grate 48. Cooling air hole 50 and cooling air channel 22 correspond to each other, so that cooling air flowing from the cooling air hole enters the cooling air passage 22 and flows into the gap 46 in directions 53a, 53b by means of the cooling grommet 48.
  • the cooling air is thus introduced far away from the expansion gaps below the heat shield brick 35. This allows a particularly effective cooling of the support structure. In addition, an impact cooling of the heat shield brick 35 is avoided according to the invention. Since the cooling grommet 48 is arranged in the illustrated embodiment between two mounting portions 40, 41 of the stone holder 38, 39 centrally below the heat shield brick 35, in particular the areas of the support structure fixing the stone holder are cooled. Also, the length of the cooling air hole 50 may be selected such that the cooling grommet 48 is fully retractable during installation and removal of the heat shield bricks therein.
  • FIG. 6 shows the heat shield 33 shown in FIG. 5 in a further sectional view along the plane marked with arrows VI-VI.
  • the cooling air hole 50 opens into the groove bottom 56 of this fastening groove 55.
  • the cooling grommet 48 is arranged with the longitudinal axis 21 perpendicular to the surface 51 of the support structure 34 in the groove bottom 56 on the cooling air bore 50 and protrudes a distance 58 from the groove Bottom 56 out.
  • the distance 58 is in this case selected such that the cooling grommet 48 does not touch the cold side 36 of the heat shield block 35 and the cooling air flows out of the outlet channels 52a, 52b into the fastening groove 55 and upwards. Because of the arranged between the stone holders position of thedemade 48 enters the gap 46.
  • FIG. 7 shows a section of a heat shield 60 according to the invention in accordance with a fifth exemplary embodiment.
  • This differs from that shown in Figure 5 in that additionally in the groove bottom of the mounting groove a cooling air groove 62 extends.
  • Thedemade 48 is lowered to the level of the groove bottom of the mounting groove in the cooling air hole 50, wherein the output channels 52a, 52b of thedemade 48 open in the longitudinal direction in the cooling air groove 62.
  • This has the advantage that the stone holders can be moved over the cooling grommet 48 for installation and removal of the heat shield bricks 35 through the fastening groove.
  • the function of thedemade 48 remains hereby.
  • the effluent from thedemade 48 cooling air, the flow directions are exemplified with arrows, is in the cooling air groove 62nd
  • FIG. 8 shows the heat shield 60 shown in FIG. 7 in a sectional view along the plane indicated by the arrows VIII-VIII.
  • the stone holder (not shown in this view) securing the heat shield brick 35 to the support structure 34 are held with their attachment portions in the attachment groove 55 on the support structure 34.
  • the cooling air hole 50 opens into the groove bottom 56 of this mounting groove 55.
  • Thedemade 48 is connected to the
  • Longitudinal axis 21 is arranged perpendicular to the surface 51 of the support structure 34 in the groove bottom 56 on the cooling air bore 50 and lowered to the level of the groove bottom 56 in the cooling air bore 50.
  • the cooling air emerging from the output channels 52a, 52b of the cooling grate 48 first flows into the cooling air groove 62 and from here into the intermediate space 46. In this, the cooling air can distribute and effectively cool the support structure below the heat shield brick 35.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Description

Beschreibung description

Vorrichtung zum Kühlen einer Tragstruktur eines Hitzeschildes und Hitzeschild Apparatus for cooling a support structure of a heat shield and heat shield

Die Erfindung bezieht sich auf eine Vorrichtung zum Kühlen der Tragstruktur eines Hitzeschildes und auf ein Hitzeschild, insbesondere auf ein Hitzeschild für eine Brennkammer einer Gasturbine . The invention relates to a device for cooling the support structure of a heat shield and to a heat shield, in particular to a heat shield for a combustion chamber of a gas turbine.

Die Erfindung bezieht sich auch auf eine Brennkammer und auf eine Gasturbine mit einem derartigen Hitzeschild. The invention also relates to a combustion chamber and to a gas turbine with such a heat shield.

In vielen technischen Anwendungen werden Hitzeschilde verwen- det, welche Heißgasen von 1000 bis 1600 Grad Celsius widerstehen müssen. Insbesondere Gasturbinen, wie sie in stromerzeugenden Kraftwerken und in Flugzeugtriebwerken Verwendung finden, weisen entsprechend große durch Hitzeschilde abzuschirmende Flächen im Innern der Brennkammern auf. Wegen der thermischen Ausdehnung und wegen großer Abmessungen muss das Hitzeschild aus einer Vielzahl einzelner, im Allgemeinen keramischer Hitzeschildsteine zusammengesetzt werden, die voneinander mit einem ausreichenden Spalt beabstandet an einer Tragstruktur befestigt sind. Dieser Spalt bietet den Hitze- schildelementen ausreichenden Raum für die thermische Ausdehnung. Da jedoch der Spalt auch einen direkten Kontakt der heißen Verbrennungsgase mit der metallischen Tragstruktur und den Halteelementen ermöglicht, wird als eine Gegenmaßnahme durch die Spalte in Richtung der Brennkammer Kühlluft In many technical applications, heat shields are used, which have to withstand hot gases of 1000 to 1600 degrees Celsius. In particular, gas turbines, such as those used in power-generating power plants and in aircraft engines, have correspondingly large surfaces to be shielded by heat shields in the interior of the combustion chambers. Because of thermal expansion and large dimensions, the heat shield must be composed of a plurality of individual, generally ceramic heat shield bricks, spaced apart from each other with a sufficient gap to a support structure. This gap provides the heat shield elements with sufficient space for thermal expansion. However, since the gap also allows direct contact of the hot combustion gases with the metallic support structure and the support members, cooling air is introduced as a countermeasure by the gaps in the direction of the combustion chamber

eingedüst. injected.

Ein gattungsgemäßes Hitzeschild umfasst somit eine Tragstruktur und eine Anzahl von Hitzeschildsteinen, welche an der Tragstruktur mittels Steinhaltern lösbar befestigt sind, wo- bei jeder Hitzeschildstein eine der Tragstruktur zugewandteA generic heat shield thus comprises a support structure and a number of heat shield bricks which are releasably secured to the support structure by means of stone holders, each heat shield brick facing one of the support structure

Kaltseite und eine der Kaltseite gegenüberliegende, mit einem heißen Medium beaufschlagbare Heißseite aufweist. Jeder der Steinhalter weist mindestens einen Halteabschnitt zur Befes- tigung an einem Hitzeschildstein und einen an der Tagstruktur befestigbaren Befestigungsabschnitt auf. Zum Schutz vor Heißgasen ist mindestens eine Kühlluftpassage in der Tragstruktur vorgesehen . Cold side and one of the cold side opposite, can be acted upon with a hot medium hot side. Each of the stone holders has at least one holding section for fastening on a heat shield stone and attachable to the tag structure attachment portion. For protection against hot gases, at least one cooling air passage is provided in the support structure.

Zur Befestigung der Steinhalter an der Tragstruktur können in der Tragstruktur kreisförmig umlaufende und parallele Befestigungs-Nuten vorgesehen sein. Die Steinhalter werden in diesem Fall mit ihren Befestigungsabschnitten nacheinander in die Befestigungs-Nuten eingeschoben, wobei nachkommende For fixing the stone holder to the support structure, circular circumferential and parallel fastening grooves may be provided in the support structure. The stone holder are inserted in this case with their attachment sections one after the other in the mounting grooves, with nachkommende

Steinhalter die Position der vorher positionierten Steinhalter versperren. Auf diese Weise kann eine kreisförmig umlaufende Reihe von Hitzeschildsteinen an der Tragstruktur innerhalb einer Brennkammer einer Gasturbine befestigt werden.  Stone holder block the position of previously positioned stone holder. In this way, a circular encircling row of heat shield bricks may be secured to the support structure within a combustor of a gas turbine.

Die EP 1 701 095 AI offenbart ein Hitzeschild einer Brennkammer einer Gasturbine mit einer Tragstruktur und einer Anzahl von lösbar an der Tragstruktur angeordneten Hitzeschildsteinen. Zum Schutz der Brennkammerwand sind die Hitzeschildstei - ne flächendeckend unter Belassung von Dehnungsspalten an der Tragstruktur angeordnet, wobei jeder Hitzeschildstein eine der Tragstruktur zugewandte Kaltseite und eine der Kaltseite gegenüberliegende, mit einem heißen Medium beaufschlagbare Heißseite aufweist. Die Hitzeschildsteine sind mit je vier metallischen Steinhaltern federnd an der Tragstruktur befestigt. Hierzu umfasst jeder Steinhalter einen Halteabschnitt in Form eines Greifabschnitts und einen Befestigungsabschnitt. In jeder Hitzeschildsteinseite sind an zwei gegenüberliegenden Umfangsseiten Haltenuten eingebracht, so dass zum Halten des Hitzeschildsteins die Greifabschnitte der Steinhalter gegenüberliegend in die Haltenuten eingreifen können. Die derart am Hitzeschildstein gegenüberliegend befestigten Steinhalter sind mit ihrem Befestigungsabschnitt in einer unterhalb des Hitzeschildsteins verlaufenden Befesti- gungs-Nut in der Tragstruktur geführt. Zum Schutz vor Heißgasen sind die Greifabschnitte der metallischen Steinhalter gekühlt. Hierzu sind in die Steinhalter im Bereich des Halteabschnitts und in die Halteriegel der Hitzeschildsteine Öffnun- gen eingebracht, welche mit einer in der Tragstruktur angeordneten Kühlluftbohrung fluchten, so dass Kühlluft aus der Kühlluftbohrung strömend in direkter Linie auf eine Kaltseite des Greifabschnittes prallt. EP 1 701 095 A1 discloses a heat shield of a combustion chamber of a gas turbine having a support structure and a number of heat shield bricks arranged detachably on the support structure. In order to protect the combustion chamber wall, the heat shield elements are arranged on the supporting structure, leaving expansion gaps on each support structure, each heat shield brick having a cold side facing the support structure and a hot side opposite the cold side and capable of being acted upon by a hot medium. The heat shield bricks are resiliently fastened to the support structure with four metallic stone holders each. For this purpose, each stone holder comprises a holding section in the form of a gripping section and a fixing section. In each heat shield brick side retaining grooves are introduced on two opposite circumferential sides, so that for holding the heat shield brick, the gripping portions of the stone holder opposite can engage in the retaining grooves. The stone holders, which are fastened on the heat shield brick opposite to one another, are guided with their fastening portion in a fastening groove extending below the heat shield brick in the support structure. To protect against hot gases, the gripping portions of the metallic stone holder are cooled. For this purpose, the stone holders in the area of the holding section and in the holding bars of the heat shield bricks must be opened. introduced, which are aligned with a cooling air hole arranged in the support structure, so that cooling air from the cooling air hole flowing in direct line on a cold side of the gripping portion bounces.

Trotz dieser Kühlung der Greifabschnitte gemäß dem Stand der Technik kann es bei Beaufschlagung des Hitzeschildes mit Heißgas zu Heißgaseinzug im Bereich der Dehnungsspalten zwischen den Hitzeschildsteinen kommen. Das Heißgas kann sich sodann unterhalb des Hitzeschildes ausbreiten und zur Verzunderung der Tragstruktur führen. Despite this cooling of the gripping sections according to the prior art, when hot gas is applied to the heat shield, hot gas intake may occur in the area of the expansion gaps between the heat shield bricks. The hot gas can then spread below the heat shield and lead to scaling of the support structure.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Vorrichtung zur Kühlung der Tragstruktur eines gattungsgemäßen Hitzeschildes und ein Hitzeschild anzugeben, mit welchem eine Verzunderung der Tragstruktur aufgrund von Heißgaseinzug besonders effektiv vermieden werden kann. It is therefore an object of the present invention to provide a device for cooling the support structure of a generic heat shield and a heat shield, with which a scaling of the support structure due to hot gas intake can be particularly effectively avoided.

Die Aufgabe wird erfindungsgemäß bei einer Vorrichtung zur Kühlung der Tragstruktur eines Hitzeschildes der eingangs genannten Art dadurch gelöst, dass die Vorrichtung eine Längsachse und einen Kühlluftkanal umfasst, wobei die Vorrichtung mit der Längsachse senkrecht zur Oberfläche der Tragstruktur an der Tragstruktur anordenbar ist. In dieser Position er- streckt sich der Kühlluftkanal von einem zur Tragstruktur weisenden Ende der Vorrichtung aus und umfasst stromab mindestens einen Ausgangskanal . Der mindestens eine Ausgangskanal tritt in Bezug auf die Längsachse seitlich aus der Vorrichtung aus. Die Vorrichtung ist derart an der Tragstruktur anordenbar, dass der Kühlluftkanal mit mindestens einer in der Tragstruktur angeordneten Kühlluftpassage korrespondiert. The object is achieved in a device for cooling the support structure of a heat shield of the type mentioned above in that the device comprises a longitudinal axis and a cooling air duct, wherein the device with the longitudinal axis perpendicular to the surface of the support structure on the support structure can be arranged. In this position, the cooling air duct extends from an end of the device facing the support structure and comprises at least one exit channel downstream. The at least one exit channel exits the device laterally with respect to the longitudinal axis. The device can be arranged on the support structure such that the cooling air duct corresponds to at least one cooling air passage arranged in the support structure.

Erfindungsgemäß ist somit bei an der Tragstruktur angeordneten Hitzeschildsteinen Kühlluft in den Zwischenraum zwischen Kaltseite des Hitzeschildsteines und der Tragstruktur According to the invention, cooling air is thus in the intermediate space between the cold side of the heat shield brick and the support structure when arranged on the support structure heat shield bricks

einströmbar. Die Kühlluft kann hierbei mittels der Vorrichtung von einer über der Tragstruktur erhöhten Position aus in den Zwischenraum eingebracht werden. Zudem strömt die Kühlluft seitlich aus der Vorrichtung in den Zwischenraum ein. Dies vermeidet eine Schädigung der Hitzeschildsteine durch Prallkühlung und die Kühlluft verteilt sich unterhalb der Hitzeschildsteine ohne sofort durch die Dehnungsspalten zwischen den Hitzeschildsteinen zu entweichen. Diese ermöglicht eine effektive Kühlung der Tragstruktur des Hitzeschildes unter Vermeidung einer Schädigung der Hitzeschildsteine. einströmbar. In this case, the cooling air can be introduced into the intermediate space by means of the device from an elevated position above the support structure. In addition, the flows Cooling air laterally from the device into the space. This avoids damage to the heat shield stones by impingement cooling and the cooling air is distributed below the heat shield bricks without immediately escape through the expansion gaps between the heat shield bricks. This allows effective cooling of the support structure of the heat shield while avoiding damage to the heat shield stones.

Dass der Kühlluftkanal (bei an der Tragstruktur angeordneter Vorrichtung) mit mindestens einer in der Tragstruktur angeordneten Kühlluftpassage korrespondiert, ist derart zu verstehen, dass aus der mindestens einen Kühlluftpassage austretende Kühlluft zumindest teilweise in den Kühlluftkanal eintritt. Beispielsweise können Kühlluftkanal und Kühlluftpassa- ge miteinander fluchten oder aneinander angrenzen. Bei der Kühlluftpassage kann es sich beispielsweise um eine in der Tragstruktur angeordnete Kühlluftbohrung handeln, in welche die Vorrichtung mit ihrem der Tragstruktur zugewandten Ende einschraubbar ist. That the cooling air duct (in the case of a device arranged on the support structure) corresponds to at least one cooling air passage arranged in the support structure is to be understood such that cooling air leaving the at least one cooling air passage at least partially enters the cooling air duct. For example, cooling air duct and cooling air passages can be aligned with one another or adjoin one another. The cooling air passage can be, for example, a cooling air bore arranged in the support structure, into which the device can be screwed with its end facing the support structure.

Die Längsachse der Vorrichtung muss nicht identisch mit einer durch die Form des Körpers vorgegebenen Längsachse sein. Sie ist fiktiv und verläuft bei an der Tragstruktur angeordneter Vorrichtung durch den Befestigungsbereich der Vorrichtung hindurch und senkrecht zur Oberfläche der Tragstruktur. Oberflächenunebenheiten sind hierbei nicht zu berücksichtigen. The longitudinal axis of the device need not be identical to a longitudinal axis defined by the shape of the body. It is fictitious and, with the device arranged on the support structure, extends through the fastening region of the device and perpendicular to the surface of the support structure. Surface irregularities are not to be considered here.

Das die Vorrichtung zum Kühlen der Tragstruktur an der Tragstruktur anordenbar ist, umfasst begrifflich auch solche Vor- richtungen, die teilweise in der Tragstruktur versenkt in dieser befestigt sind oder, die innerhalb einer in der Tragstruktur verlaufenden Ausnehmung angeordnet sind. The device for cooling the support structure can be arranged on the support structure also conceptually includes devices which are partially secured in the support structure, or which are arranged within a recess extending in the support structure.

Es kann vorteilhaft vorgesehen sein, dass die Vorrichtung ein Gewindestift mit integriertem Kühlluftkanal ist. Diese Weiterbildung der Erfindung weist einen besonders einfachen Aufbau auf und ist somit mit geringen Herstellungskosten verbunden. Vorteilhafterweise kann weiter vorgesehen sein, dass der mindestens eine Ausgangskanal radial zur Längsachse verläuft . It can be advantageously provided that the device is a threaded pin with integrated cooling air duct. This development of the invention has a particularly simple structure and is thus associated with low production costs. Advantageously, it can further be provided that the at least one output channel extends radially to the longitudinal axis.

Die aus dem Ausgangskanal austretende Kühlluft strömt somit parallel zur Tragstruktur von einer erhöhten Position aus in den Zwischenraum zwischen Hitzeschildsteinen und Tragstruktur ein. Dies ermöglicht die Kühlung eines weiten Bereiches der Tragstruktur und vermeidet gleichzeitig eine Prallkühlung der Hitzeschildsteine . Es kann auch als vorteilhaft angesehen werden, dass die Vorrichtung zwei gegenüberliegende Ausgangskanäle umfasst. The cooling air emerging from the outlet channel thus flows parallel to the support structure from an elevated position into the gap between the heat shield bricks and the support structure. This allows the cooling of a wide range of the supporting structure and at the same time avoids impact cooling of the heat shield stones. It may also be considered advantageous that the device comprises two opposing output channels.

Diese Ausgestaltung der Erfindung eignet sich besonders zur Kühlung einer Befestigungs-Nut in der Tragstruktur. This embodiment of the invention is particularly suitable for cooling a mounting groove in the support structure.

Es kann auch als vorteilhaft angesehen werden, dass die Vorrichtung vier Ausgangskanäle aufweist. It may also be considered advantageous that the device has four output channels.

Dies ermöglicht eine gleichmäßige Kühlung der um die Vorrich- tung herum angeordneten Tragstrukturbereiche. This enables a uniform cooling of the support structure areas arranged around the device.

Eine weitere Aufgabe der Erfindung ist es, ein Hitzeschild der eingangs genannten Art anzugeben, mit welchem eine Verzunderung der Tragstruktur aufgrund von Heißgaseinzug beson- ders effektiv vermieden werden kann. Another object of the invention is to provide a heat shield of the type mentioned, with which a scaling of the support structure due to hot gas intake can be particularly effectively avoided.

Hierzu umfasst das Hitzeschild zum Schutz vor Heißgasen mindestens eine Kühlluftpassage in der Tragstruktur, an welcher eine Vorrichtung gemäß einem der Ansprüche 1 bis 5 angeordnet ist. For this purpose, the heat shield for protection against hot gases comprises at least one cooling air passage in the support structure, on which a device according to one of claims 1 to 5 is arranged.

Der Begriff „die Vorrichtung ist an der Kühlluftpassage angeordnet" ist hierbei derart zu verstehen, dass der von der Vorrichtung umfasste Kühlluftkanal mit der Kühlluftpassage korrespondiert . The term "the device is arranged on the cooling air passage" in this case is to be understood such that the of Device included cooling air passage with the cooling air passage corresponded.

Die Vorrichtung kann beispielsweise unterhalb des Kreuzungs- bereiches zweier Dehnungsspalten an der Tragstruktur angeordnet sein. In diesem Bereich kann mit nur einer Vorrichtung bei entsprechender Anzahl an Ausgangskanälen unter den vier angrenzenden Hitzeschildsteinen Kühlluft in den jeweiligen Zwischenraum zwischen der Kaltseite des Hitzeschildsteins und der Tragstruktur eingedüst werden. The device can be arranged, for example, below the crossing region of two expansion gaps on the support structure. In this area, cooling air can be injected into the respective gap between the cold side of the heat shield brick and the support structure with only one device with a corresponding number of output channels under the four adjacent heat shield bricks.

Bevorzugt ist die Vorrichtung aber unterhalb eines Hitzeschildsteins an der Tragstruktur angeordnet. Der Begriff „unterhalb eines Hitzeschildsteines" ist hierbei derart zu verstehen, dass die Vorrichtung in einem Bereich der Tragstruktur angeordnet ist, welchem die Kaltseite des Hitzeschildsteines zugewandt ist. Entsprechend dieser Weiterbildung der Erfindung kann die Vorrichtung insbesondere unterhalb eines Hitzeschildsteines in der Nähe eines Befestigungsabschnitts eines Steinhalters angeordnet sein. Hierbei können die seitlich austretenden Ausgangskanäle in Richtung der Tragstruktur geneigt und derart positioniert sein, dass der mindestens eine austretende Kühlluftstrahl auf diejenigen Strukturen gerichtet ist, welche die Steinhalter in ihrer Befestigung halten. Preferably, however, the device is arranged below a heat shield block on the support structure. The term "below a heat shield brick" is to be understood in this case as meaning that the apparatus is arranged in a region of the support structure facing the cold side of the heat shield brick According to this embodiment of the invention, the apparatus can be located below a heat shield brick in the vicinity of a fastening portion of a In this case, the laterally emerging output channels can be inclined in the direction of the support structure and be positioned such that the at least one exiting cooling air jet is directed at those structures which hold the stone holders in their attachment.

Vorteilhafterweise sind die Befestigungsabschnitte der Stein- halter innerhalb von in der Tragstruktur verlaufenden Befestigungs-Nuten lösbar befestigt und die Kühlluftpassage mündet in den Nut-Boden der Befestigungs-Nut. Die Vorrichtung ist hierbei im Nut-Boden an der Kühlluftpassage angeordnet. Gemäß dieser Weiterbildung der Erfindung muss zum Ein- und Ausbau der Hitzeschildsteine die Vorrichtung entweder entfernt werden oder sie ist derart im Nut-Boden angeordnet, dass die Steinhalter über die Vorrichtung hinweg durch die Befestigungs-Nut geschoben werden können. Advantageously, the mounting portions of the stone holder are releasably secured within mounting grooves extending in the support structure and the cooling air passage opens into the groove bottom of the mounting groove. The device is in this case arranged in the groove bottom on the cooling air passage. According to this embodiment of the invention, the device must either be removed or it is arranged in the groove bottom for installing and removing the heat shield bricks, that the stone holders can be pushed over the device through the mounting groove.

Gemäß einer vorteilhaften Weiterbildung der Erfindung ist die Vorrichtung zwischen zwei Befestigungsabschnitten der Steinhalter im Wesentlichen mittig unter einem Hitzeschildstein angeordnet. According to an advantageous embodiment of the invention, the device between two attachment portions of the stone holder is arranged substantially centrally under a heat shield brick.

Mit anderen Worten befindet sich die Vorrichtung zwischen zwei Befestigungsabschnitten zweier gegenüberliegender Steinhalter, welche einen gemeinsamen Hitzeschildstein an gegenüberliegenden Seitenwänden des Hitzeschildsteines halten. Auf diese Weise lässt sich die aus der Vorrichtung austretende Kühlluft unterhalb des Hitzeschildsteines eindüsen, ohne dass die Steinhalter den Strömungsweg der Kühlluft blockieren . In other words, the device is located between two attachment portions of two opposing stone holders, which hold a common heat shield brick on opposite side walls of the heat shield brick. In this way, the cooling air emerging from the device can be injected below the heat shield brick without the stone holders blocking the flow path of the cooling air.

Vorteilhafterweise kann weiter vorgesehen sein, dass im Nut- Boden der Befestigungs-Nut eine Kühlluft-Nut verläuft und die Vorrichtung in die Kühlluftbohrung mindestens auf Höhe des Nut-Bodens abgesenkt ist, wobei sich die Ausgangskanäle der Vorrichtung in die Kühlluft-Nut öffnen. Advantageously, it can further be provided that a cooling air groove runs in the groove bottom of the fastening groove and the device is lowered into the cooling air bore at least at the level of the groove bottom, the outlet channels of the device opening into the cooling air groove.

Insbesondere kann die Vorrichtung gemäß dieser Ausbildung der Erfindung derart in der Kühlluft-Nut angeordnet sein, dass sie nicht über den Nutboden der Befestigungs-Nut hinaus ragt. Somit können die Steinhalter über die Vorrichtung hinweg in der Befestigungs-Nut verschoben werden. Dies ermöglicht einen einfachen Ein- und Ausbau der Hitzeschildsteine zu Reparatur- und Wartungszwecken. In particular, the device according to this embodiment of the invention can be arranged in the cooling air groove such that it does not protrude beyond the groove bottom of the fastening groove. Thus, the stone holders can be moved across the device in the mounting groove. This allows for easy installation and removal of the heat shield stones for repair and maintenance purposes.

Es kann auch als vorteilhaft betrachtet werden, dass die Kühlluft-Nut an ihren Enden einen Auslauf umfasst. Dies ermöglicht einen strömungstechnisch verbesserten Austritt der Kühlluft aus der Kühlluft-Nut. Gemäß einer vorteilhaften Weiterbildung der Erfindung können die Tragstruktur und die Vorrichtung derart miteinander korrespondieren, dass die Vorrichtung zum Ein- und Ausbau der Hitzeschildsteine in der Tragstruktur versenkbar ist. It can also be considered advantageous that the cooling air groove comprises an outlet at its ends. This allows a fluidically improved outlet of the cooling air from the cooling air groove. According to an advantageous development of the invention, the support structure and the device can correspond to one another such that the device for installing and removing the heat shield bricks in the support structure can be lowered.

Zur Versenkung der Vorrichtung in der Tragstruktur kann die Vorrichtung beispielsweise vollständig in die Tragstruktur einschraubbar sein. Gemäß einer anderen Ausgestaltung der Weiterbildung kann die Vorrichtung in zwei ineinander For sinking the device in the support structure, the device may for example be completely screwed into the support structure. According to another embodiment of the development, the device in two into one another

überführbare Positionen an der Tragstruktur anordenbar sein. Dabei dient eine erste Position mit der Längsachse senkrecht zur Tragstruktur-Oberfläche dem Einleiten von Kühlluft und eine zweite Position mit der Längsachse parallel zur Oberfläche der Tragstruktur der Versenkung der Vorrichtung. translatable positions can be arranged on the support structure. In this case, a first position with the longitudinal axis perpendicular to the support structure surface serves to introduce cooling air and a second position with the longitudinal axis parallel to the surface of the support structure of the sinking of the device.

Eine weitere Aufgabe der Erfindung ist es, eine Brennkammer und eine Gasturbine mit mindestens einer Brennkammer anzugeben, mit welcher eine Verzunderung der Tragstruktur aufgrund von Heißgaseinzug eines von der Brennkammer umfassten Hitze- Schildes besonders effektiv vermieden werden kann. Another object of the invention is to provide a combustion chamber and a gas turbine with at least one combustion chamber, with which a scaling of the support structure due to hot gas intake of a heat shield covered by the combustion chamber can be particularly effectively avoided.

Die Aufgabe wird erfindungsgemäß bei einer Brennkammer und einer Gasturbine der eingangs genannten Art dadurch gelöst, dass das Hitzeschild gemäß einem der Ansprüche 6 bis 12 aus- gebildet ist. The object is achieved in a combustion chamber and a gas turbine of the type mentioned above in that the heat shield is formed according to one of claims 6 to 12.

Weitere zweckmäßige Ausgestaltungen und Vorteile der Erfindung sind Gegenstand der Beschreibung von Ausführungsbeispielen der Erfindung unter Bezug auf die Figur der Zeichnung, wobei gleiche Bezugszeichen auf gleich wirkende Bauteile verweisen . Further expedient refinements and advantages of the invention are the subject matter of the description of embodiments of the invention with reference to the figure of the drawing, wherein like reference numerals refer to the same functioning components.

Dabei zeigt die Fig.l eine schematische Darstellung einer Gasturbine nach dem Stand der Technik, Fig.2 schematisch eine erfindungsgemäße Vorrichtung zum1 shows a schematic representation of a gas turbine according to the prior art, 2 shows schematically a device according to the invention for

Kühlen einer Tragstruktur eines Hitzeschildes gemäß einem ersten Ausführungsbeispiel in einer Schnittansicht , Cooling a support structure of a heat shield according to a first embodiment in a sectional view,

Fig.3 schematisch einen Querschnitt durch eine erfindungsgemäße Vorrichtung zum Kühlen der Tragstruktur gemäß einem zweiten Ausführungsbeispiel, Fig.4 schematisch einen Querschnitt einer erfindungsgemäßen 3 schematically a cross section through an inventive device for cooling the support structure according to a second embodiment, Figure 4 schematically shows a cross section of an inventive

Vorrichtung gemäß einem dritten Ausführungsbeispiel,  Device according to a third embodiment,

Fig.5 schematisch einen Ausschnitt eines erfindungsgemäßen 5 shows schematically a section of an inventive

Hitzeschildes mit einer an der Tragstruktur angeord- neten Vorrichtung zum Kühlen der Tragstruktur gemäß einem vierten Ausführungsbeispiel,  Heat shield with a device arranged on the support structure for cooling the support structure according to a fourth embodiment,

Fig.6 eine schematische Darstellung des in Fig.5 dargestellten Hitzeschilds in einer weiteren Schnittan- sieht entlang der in Fig.5 durch die Pfeile VI-VI gekennzeichneten Ebene, 6 shows a schematic representation of the heat shield shown in FIG. 5 in a further sectional view along the plane indicated by the arrows VI-VI in FIG. 5, FIG.

Fig.7 schematisch einen Ausschnitt eines erfindungsgemäßen 7 shows schematically a detail of an inventive

Hitzeschildes gemäß einem fünften Ausführungsbeispiel in einer Schnittansicht und  Heat shield according to a fifth embodiment in a sectional view and

Fig.8 das in Fig.7 dargestellte Hitzeschild in einer 8 shows the heat shield shown in Figure 7 in a

Schnittansicht entlang der in Fig.7 durch die Pfeile VIII-VIII gekennzeichneten Ebene.  Sectional view along the plane indicated in Figure 7 by the arrows VIII-VIII.

Die Figur 1 zeigt eine schematische Schnittansicht einer Gasturbine 1 nach dem Stand der Technik. Die Gasturbine 1 weist im Inneren einen um eine Rotationsachse 2 drehgelagerten Rotor 3 mit einer Welle 4 auf, der auch als Turbinenläufer be- zeichnet wird. Entlang des Rotors 3 folgen aufeinander ein Ansauggehäuse 6, ein Verdichter 8, ein Verbrennungssystem 9 mit einer Anzahl an Brennkammern 10, die jeweils eine Brenneranordnung 11 und ein Gehäuse 12 umfassen, eine Turbine 14 und ein Abgasgehäuse 15. Das Gehäuse 12 ist zum Schutz vor Heißgasen mit einem Hitzeschild (nicht dargestellt) ausgekleidet . Das Verbrennungssystem 9 kommuniziert mit einem beispielsweise ringförmigen Heißgaskanal. Dort bilden mehrere hintereinander geschaltete Turbinenstufen die Turbine 14. Jede Turbinenstufe ist aus Schaufelringen gebildet. In Strömungsrichtung eines Arbeitsmediums gesehen, folgt im Heißkanal einer aus Leitschaufeln 17 gebildeten Reihe eine aus Laufschaufeln 18 gebildete Reihe. Die Leitschaufeln 17 sind dabei an einem Innengehäuse eines Stators 19 befestigt, wohingegen die Lauf- schaufeln 18 einer Reihe beispielsweise mittels einer Turbinenscheibe am Rotor 3 angebracht sind. An dem Rotor 3 ange- koppelt ist beispielsweise ein Generator (nicht dargestellt) . FIG. 1 shows a schematic sectional view of a gas turbine 1 according to the prior art. The gas turbine 1 has inside a rotatably mounted about a rotation axis 2 rotor 3 with a shaft 4, which is also referred to as a turbine runner. Along the rotor 3 successively follow an intake housing 6, a compressor 8, a combustion system 9 with a number of combustion chambers 10, each comprising a burner assembly 11 and a housing 12, a turbine 14th and an exhaust housing 15. The housing 12 is lined with a heat shield (not shown) for protection from hot gases. The combustion system 9 communicates with an annular hot gas duct, for example. There, a plurality of successively connected turbine stages form the turbine 14. Each turbine stage is formed of blade rings. When viewed in the direction of flow of a working medium, the hot runner of a row formed by vanes 17 is followed by a row formed by buckets 18. The guide vanes 17 are fastened to an inner housing of a stator 19, whereas the moving blades 18 of a row are attached to the rotor 3, for example by means of a turbine disk. Coupled to the rotor 3 is, for example, a generator (not shown).

Während des Betriebes der Gasturbine wird vom Verdichter 8 durch das Ansauggehäuse 6 Luft angesaugt und verdichtet . Die am turbinenseitigen Ende des Verdichters 8 bereitgestellte verdichtete Luft wird zu dem Verbrennungssystem 9 geführt und dort im Bereich der Brenneranordnung 11 mit einem Brennstoff vermischt. Das Gemisch wird dann mit Hilfe der Brenneranordnung 11 unter Bildung eines Arbeitsgasstromes im Verbrennungssystem 9 verbrannt. Von dort strömt der Arbeitsgasstrom entlang des Heißgaskanals an den Leitschaufeln 17 und den Laufschaufeln 18 vorbei. An den Laufschaufeln 18 entspannt sich der Arbeitsgasstrom impulsübertragend, so dass die Laufschaufeln 18 den Rotor 3 antreiben und dieser den an ihn angekoppelten Generator (nicht dargestellt) . During operation of the gas turbine, air is sucked in and compressed by the compressor 8 through the intake housing 6. The compressed air provided at the turbine-side end of the compressor 8 is led to the combustion system 9 where it is mixed with a fuel in the area of the burner assembly 11. The mixture is then burned by means of the burner assembly 11 to form a working gas stream in the combustion system 9. From there, the working gas stream flows along the hot gas channel past the guide vanes 17 and the rotor blades 18. At the rotor blades 18, the working gas stream relaxes in a pulse-transmitting manner, so that the rotor blades 18 drive the rotor 3 and this drives the generator (not shown) coupled to it.

Die Figur 2 zeigt schematisch eine erfindungsgemäße Vorrichtung 20 zum Kühlen einer Tragstruktur eines Hitzeschildes gemäß einem ersten Ausführungsbeispiel in einer Schnittansicht. Die Vorrichtung 20 weist eine Längsachse 21 auf und umfasst einen Kühlluftkanal 22. Der Kühlluftkanal 22 erstreckt sich von einem Ende 23 der Vorrichtung und umfasst stromab zwei Ausgangskanäle 25a und 25b, welche in Bezug auf die Längsachse 21 seitlich aus der Vorrichtung austreten und gegenüber- ± ± 2 shows schematically a device 20 according to the invention for cooling a support structure of a heat shield according to a first embodiment in a sectional view. The device 20 has a longitudinal axis 21 and comprises a cooling air channel 22. The cooling air channel 22 extends from one end 23 of the device and comprises downstream two outlet channels 25a and 25b, which laterally exit the device with respect to the longitudinal axis 21 and opposite ± ±

liegend angeordnet sind. Gemäß dem dargestellten Ausführungsbeispiel ist die Vorrichtung ein Gewindestift mit einem im Inneren des Gewindestifts verlaufenden Kühlluftkanal 22. Die dargestellte Vorrichtung 20 kann auch als Kühlmade bezeichnet werden. Der Gewindestift weist auf seiner Mantelfläche 26 ein Gewinde (nicht dargestellt) auf. Das Gewinde kann sich beispielsweise im Bereich des Endes 23 über die Mantelfläche 26 erstrecken oder sich bis zum gegenüberliegenden Ende 27 ziehen. Die Vorrichtung 20 ist mit ihrem Ende 23 an einer Trag- struktur eines Hitzeschildes anordenbar . Beispielsweise indem die Kühlmade in eine mit einem Innengewinde versehene Kühl- luftbohrung in die Tragstruktur eingeschraubt wird. In dieser Position ist aus der Kühlluftbohrung austretende Kühlluft in den Kühlluftkanal 22 einleitbar, so dass die Kühlluft stromab durch die Ausgangskanäle 25a, 25b strömt und die Kühlmade in der mit 24a und 24b bezeichneten Richtung verlässt. are arranged horizontally. According to the illustrated embodiment, the device is a threaded pin with a running inside the threaded pin cooling air passage 22. The illustrated device 20 may also be referred to as Kühlmade. The threaded pin has on its lateral surface 26 a thread (not shown). The thread may, for example, in the region of the end 23 extend over the lateral surface 26 or pull to the opposite end 27. The device 20 can be arranged with its end 23 on a support structure of a heat shield. For example, by the cooling grommet is screwed into a provided with an internal thread cooling air bore in the support structure. In this position, cooling air exiting from the cooling air hole can be introduced into the cooling air passage 22, so that the cooling air flows downstream through the output passages 25a, 25b and leaves the cooling boot in the direction indicated by 24a and 24b.

Die Figur 3 zeigt einen Querschnitt einer erfindungsgemäßen Vorrichtung 29 zum Kühlen einer Tragstruktur gemäß einem zweiten Ausführungsbeispiel der Erfindung. Der Querschnitt verläuft hierbei senkrecht zu der Längsachse 21 auf Höhe der Ausgangskanäle 30a und 30b. Die dargestellte Vorrichtung 29 unterscheidet sich von der in Figur 2 dargestellten Kühlmade lediglich durch den Winkel, unter dem die Ausgangskanäle 30a und 30b in Bezug auf die Längsachse 21 seitlich aus der Vorrichtung austreten. Bei dem dargestellten Ausführungsbeispiel verlaufen die Ausgangskanäle radial zur Längsachse 21 und sind gegenüberliegend angeordnet. Durch den Kühlluftkanal 22 strömende Kühlluft wird stromab auf die Ausgangskanäle 30a und 30b aufgeteilt und verlässt die Kühlmade in der dargestellten Ausströmrichtung 31a und 31b. FIG. 3 shows a cross section of a device 29 according to the invention for cooling a support structure according to a second exemplary embodiment of the invention. The cross section in this case runs perpendicular to the longitudinal axis 21 at the level of the output channels 30a and 30b. The illustrated device 29 differs from the described in Figure 2 Kühlmade only by the angle at which exit the output channels 30a and 30b with respect to the longitudinal axis 21 laterally from the device. In the illustrated embodiment, the output channels extend radially to the longitudinal axis 21 and are arranged opposite one another. Cooling air flowing through the cooling air passage 22 is divided downstream of the output passages 30a and 30b and leaves the cooling boot in the illustrated outflow direction 31a and 31b.

Die Figur 4 zeigt einen Querschnitt einer erfindungsgemäßen Vorrichtung 64 zum Kühlen einer Tragstruktur gemäß einem dritten Ausführungsbeispiel der Erfindung. Der Querschnitt verläuft hierbei senkrecht zu der Längsachse 21 auf Höhe der Ausgangskanäle 66a, 66b, 66c und 66d. Die dargestellte Vorrichtung 64 unterscheidet sich von der in Figur 3 dargestell- ten Kühlmade lediglich durch die Anzahl der Ausgangskanäle. Das dargestellte Ausführungsbeispiel umfasst vier Ausgangskanäle, welche radial zur Längsachse 21 verlaufen und paarweise gegenüberliegend angeordnet sind. Durch den Kühlluftkanal 22 strömende Kühlluft wird stromab auf die Ausgangskanäle 66a, 66b, 66c, 66d aufgeteilt und verlässt die Kühlmade 64 in den dargestellten Richtungen 67a, 67b, 67c, 67d. FIG. 4 shows a cross section of a device 64 according to the invention for cooling a support structure according to a third exemplary embodiment of the invention. The cross section in this case runs perpendicular to the longitudinal axis 21 at the level of the output channels 66a, 66b, 66c and 66d. The illustrated device 64 differs from the one shown in FIG. only by the number of output channels. The illustrated embodiment comprises four output channels, which extend radially to the longitudinal axis 21 and are arranged in pairs opposite one another. Cooling air flowing through the cooling air passage 22 is divided downstream of the output passages 66a, 66b, 66c, 66d and exits the cooling grate 64 in the illustrated directions 67a, 67b, 67c, 67d.

Die Figur 5 zeigt einen Ausschnitt eines erfindungsgemäßen Hitzeschildes 33 mit einer Tragstruktur 34 und einer Anzahl von Hitzeschildsteinen, von denen beispielhaft ein Hitzeschildstein 35 in der Figur dargestellt ist. Der Hitzeschildstein 35 weist eine der Tragstruktur 34 zugewandte KaltseiteFIG. 5 shows a detail of a heat shield 33 according to the invention with a support structure 34 and a number of heat shield bricks, of which a heat shield brick 35 is shown by way of example in the FIGURE. The heat shield brick 35 has a cold side facing the support structure 34

36 und eine der Kaltseite 36 gegenüberliegende, mit einem heißen Medium beaufschlagbare Heißseite 37 auf. Der Hitzeschildstein 35 ist mittels Steinhaltern 38 und 39 an der Tragstruktur 34 befestigt. Hierzu sind die Steinhalter 38, 39 einerseits mit ihren Befestigungsabschnitten 40, 41 an der Tragstruktur 34 befestigt und greifen andererseits mit ihren Halteabschnitten 42, 43 in Halte-Nuten 44, 47 an gegenüberliegenden Seitenwänden des Hitzeschildsteins 35 ein. Bei dem auf diese Weise federnd an der Tragstruktur 34 gehaltenen Hitzeschildstein 35 kann es bei Beaufschlagung der Heißseite36 and one of the cold side 36 opposite, acted upon by a hot medium hot side 37. The heat shield brick 35 is fastened to the support structure 34 by means of stone holders 38 and 39. For this purpose, the stone holders 38, 39 are fastened on the one hand with their attachment portions 40, 41 on the support structure 34 and on the other hand engage with their holding portions 42, 43 in retaining grooves 44, 47 on opposite side walls of the heat shield brick 35 a. In the case of the heat shield brick 35, which is resiliently held on the support structure 34 in this way, it can act upon exposure to the hot side

37 mit heißen Gasen zu Heißgaseinzug in die Dehnungsspalten zwischen benachbarten Hitzeschildsteinen kommen. Die in der37 come with hot gases to Heißgaseinzug in the expansion gaps between adjacent heat shield bricks. The in the

Richtung 45 eindringenden Gase verteilen sich hierbei unter dem Hitzeschildstein 35 im Zwischenraum 46, der sich von der Kaltseite 36 des Hitzeschildsteines 35 zu einem dem Hitzeschildstein 35 zugewandten Oberflächenbereich der Tragstruk- tur 35 erstreckt. Dadurch kann es zu einer Verzunderung der Tragstruktur 34 unterhalb des Hitzeschildsteines 35 kommen. Zum Schutz vor Heißgasen ist eine erfindungsgemäße Vorrichtung 48 zur Kühlung der Tragstruktur 34 unterhalb des Hitzeschildsteines an der Tragstruktur 34 angeordnet. Bei der er- findungsgemäßen Vorrichtung 48 handelt es sich gemäß dem dargestellten Ausführungsbeispiel um einen Gewindestift mit einer Längsachse 21 und einem Kühlluftkanal 22. Die Vorrichtung 48 kann somit auch als Kühlmade 48 bezeichnet werden. Die Kühlmade 48 ist mit ihrer Längsachse 21 senkrecht zur Oberfläche 51 der Tragstruktur an der Tragstruktur angeordnet, wobei die Kühlmade 48 mit einem zur Tragstruktur weisenden Ende 23 in eine Kühlluftpassage 50 der Tragstruktur einge- schraubt ist. Die Kühlluftpassage 50 ist als Kühlluftbohrung ausgeführt. Der Kühlluftkanal 22 erstreckt sich von dem eingeschraubten Ende 23 und umfasst stromab zwei Ausgangskanäle 52a, 52b, welche seitlich der Längsachse 21 aus der Kühlmade 48 austreten. Kühlluftbohrung 50 und Kühlluftkanal 22 korres- pondieren miteinander, so dass aus der Kühlluftbohrung strömende Kühlluft in den Kühlluftkanal 22 eintritt und mittels der Kühlmade 48 in Richtungen 53a, 53b in den Zwischenraum 46 einströmt. Die Kühlluft wird somit fern der Dehnungsspalten unterhalb des Hitzeschildsteines 35 eingeleitet. Dies ermög- licht eine besonders effektive Kühlung der Tragstruktur. Zudem ist erfindungsgemäß eine Prallkühlung des Hitzeschildsteines 35 vermieden. Da die Kühlmade 48 in dem dargestellten Ausführungsbeispiel zwischen zwei Befestigungsabschnitten 40, 41 der Steinhalter 38, 39 mittig unter dem Hitzeschildstein 35 angeordnet ist, werden insbesondere die die Steinhalter befestigenden Bereiche der Tragstruktur gekühlt. Auch kann die Länge der Kühlluftbohrung 50 derart gewählt werden, dass die Kühlmade 48 während des Ein- und Ausbaus der Hitzeschildsteine in dieser vollständig versenkbar ist. Direction 45 penetrating gases are distributed here under the heat shield brick 35 in the intermediate space 46, which extends from the cold side 36 of the heat shield brick 35 to a heat shield brick 35 facing surface region of Tragstruk- structure 35. This can lead to a scaling of the support structure 34 below the heat shield brick 35. For protection against hot gases, a device 48 according to the invention for cooling the support structure 34 is arranged below the heat shield block on the support structure 34. According to the exemplary embodiment illustrated, the device 48 according to the invention is a threaded pin with a longitudinal axis 21 and a cooling air channel 22. The device 48 can thus also be referred to as a cooling grate 48. The Cooling grommet 48 is arranged with its longitudinal axis 21 perpendicular to the surface 51 of the support structure on the support structure, the cooling grille 48 being screwed into a cooling air passage 50 of the support structure with an end 23 facing the support structure. The cooling air passage 50 is designed as a cooling air hole. The cooling air channel 22 extends from the screwed-in end 23 and comprises downstream two outlet channels 52a, 52b, which emerge laterally from the longitudinal axis 21 from the cooling grate 48. Cooling air hole 50 and cooling air channel 22 correspond to each other, so that cooling air flowing from the cooling air hole enters the cooling air passage 22 and flows into the gap 46 in directions 53a, 53b by means of the cooling grommet 48. The cooling air is thus introduced far away from the expansion gaps below the heat shield brick 35. This allows a particularly effective cooling of the support structure. In addition, an impact cooling of the heat shield brick 35 is avoided according to the invention. Since the cooling grommet 48 is arranged in the illustrated embodiment between two mounting portions 40, 41 of the stone holder 38, 39 centrally below the heat shield brick 35, in particular the areas of the support structure fixing the stone holder are cooled. Also, the length of the cooling air hole 50 may be selected such that the cooling grommet 48 is fully retractable during installation and removal of the heat shield bricks therein.

Die Figur 6 zeigt das in Fig. 5 dargestellte Hitzeschild 33 in einer weiteren Schnittansicht entlang der mit Pfeilen VI- VI gekennzeichneten Ebene. In dieser Ansicht ist gezeigt, dass die Steinhalter mit ihren Befestigungsabschnitten in ei- ner Befestigungs-Nut 55 an der Tragstruktur 34 gehalten sind. Die Kühlluftbohrung 50 mündet in den Nut-Boden 56 dieser Befestigungs-Nut 55. Die Kühlmade 48 ist mit der Längsachse 21 senkrecht zur Oberfläche 51 der Tragstruktur 34 im Nut-Boden 56 an der Kühlluftbohrung 50 angeordnet und ragt eine Strecke 58 aus dem Nut-Boden 56 heraus. Die Strecke 58 ist hierbei so gewählt, dass die Kühlmade 48 nicht die Kaltseite 36 des Hitzeschildsteins 35 berührt und die Kühlluft aus den Ausgangskanälen 52a, 52b strömend in die Befestigungs-Nut 55 und auf- grund der zwischen den Steinhaltern angeordneten Position der Kühlmade 48 in den Zwischenraum 46 gelangt. FIG. 6 shows the heat shield 33 shown in FIG. 5 in a further sectional view along the plane marked with arrows VI-VI. In this view, it is shown that the stone holders with their fastening sections are held in a fastening groove 55 on the support structure 34. The cooling air hole 50 opens into the groove bottom 56 of this fastening groove 55. The cooling grommet 48 is arranged with the longitudinal axis 21 perpendicular to the surface 51 of the support structure 34 in the groove bottom 56 on the cooling air bore 50 and protrudes a distance 58 from the groove Bottom 56 out. The distance 58 is in this case selected such that the cooling grommet 48 does not touch the cold side 36 of the heat shield block 35 and the cooling air flows out of the outlet channels 52a, 52b into the fastening groove 55 and upwards. Because of the arranged between the stone holders position of the Kühlmade 48 enters the gap 46.

Die Figur 7 zeigt einen Ausschnitt eines erfindungsgemäßen Hitzeschilds 60 gemäß einem fünften Ausführungsbeispiel. Dieses unterscheidet sich von dem in Fig.5 dargestellten dadurch, dass zusätzlich im Nut-Boden der Befestigungs-Nut eine Kühlluft-Nut 62 verläuft. Die Kühlmade 48 ist bis auf Höhe des Nutbodens der Befestigungs-Nut in der Kühlluftbohrung 50 abgesenkt, wobei die Ausgangskanäle 52a, 52b der Kühlmade 48 sich in Längsrichtung in die Kühlluft-Nut 62 öffnen. Dies hat den Vorteil, dass die Steinhalter über die Kühlmade 48 hinweg zum Ein- und Ausbau der Hitzeschildsteine 35 durch die Befes- tigungs-Nut bewegt werden können. Die Funktion der Kühlmade 48 bleibt hierbei erhalten. Die aus der Kühlmade 48 ausströmende Kühlluft, deren Strömungsrichtungen beispielhaft mit Pfeilen dargestellt ist, wird in die Kühlluft-Nut 62 FIG. 7 shows a section of a heat shield 60 according to the invention in accordance with a fifth exemplary embodiment. This differs from that shown in Figure 5 in that additionally in the groove bottom of the mounting groove a cooling air groove 62 extends. The Kühlmade 48 is lowered to the level of the groove bottom of the mounting groove in the cooling air hole 50, wherein the output channels 52a, 52b of the Kühlmade 48 open in the longitudinal direction in the cooling air groove 62. This has the advantage that the stone holders can be moved over the cooling grommet 48 for installation and removal of the heat shield bricks 35 through the fastening groove. The function of the Kühlmade 48 remains hereby. The effluent from the Kühlmade 48 cooling air, the flow directions are exemplified with arrows, is in the cooling air groove 62nd

eingedüst und strömt an deren Enden mittels eines Auslaufs 63 in den Zwischenraum 46 zwischen Kaltseite des Hitzeschild- Steines 35 und der Tragstruktur 34 ein und kühlt die Tragstruktur 34 unterhalb des Hitzeschildsteines 35 unter Vermeidung einer Prallkühlung desselben. injected and flows at their ends by means of an outlet 63 in the space 46 between the cold side of the heat shield stone 35 and the support structure 34 and cools the support structure 34 below the heat shield brick 35 while avoiding the same baffle cooling.

Die Figur 8 zeigt das in Fig.7 dargestellten Hitzeschild 60 in einer Schnittansicht entlang der durch die Pfeile VIII- VIII gekennzeichneten Ebene. Die den Hitzeschildstein 35 an der Tragstruktur 34 befestigenden Steinhaltern (in dieser Ansicht nicht dargestellt) werden mit ihren Befestigungsabschnitten in der Befestigungs-Nut 55 an der Tragstruktur 34 gehalten. Die Kühlluftbohrung 50 mündet in den Nut-Boden 56 dieser Befestigungs-Nut 55. Die Kühlmade 48 ist mit der FIG. 8 shows the heat shield 60 shown in FIG. 7 in a sectional view along the plane indicated by the arrows VIII-VIII. The stone holder (not shown in this view) securing the heat shield brick 35 to the support structure 34 are held with their attachment portions in the attachment groove 55 on the support structure 34. The cooling air hole 50 opens into the groove bottom 56 of this mounting groove 55. The Kühlmade 48 is connected to the

Längsachse 21 senkrecht zur Oberfläche 51 der Tragstruktur 34 im Nut-Boden 56 an der Kühlluftbohrung 50 angeordnet und bis auf Höhe des Nut-Bodens 56 in der Kühlluftbohrung 50 abge- senkt. Dadurch können die Steinhalter zum Ein- und Ausbau der Hitzeschildsteine 35 frei in der Befestigungs-Nut 55 verschoben werden. Die aus den Ausgangskanälen 52a, 52b der Kühlmade 48 austretende Kühlluft strömt zunächst in die Kühlluft-Nut 62 ein und gelangt von hier in den Zwischenraum 46. In diesem kann sich die Kühlluft verteilen und die Tragstruktur unterhalb des Hitzeschildsteines 35 effektiv kühlen. Longitudinal axis 21 is arranged perpendicular to the surface 51 of the support structure 34 in the groove bottom 56 on the cooling air bore 50 and lowered to the level of the groove bottom 56 in the cooling air bore 50. As a result, the stone holder for installing and removing the heat shield bricks 35 can be moved freely in the mounting groove 55. The cooling air emerging from the output channels 52a, 52b of the cooling grate 48 first flows into the cooling air groove 62 and from here into the intermediate space 46. In this, the cooling air can distribute and effectively cool the support structure below the heat shield brick 35.

Claims

Patentansprüche claims 1. Vorrichtung (20, 29, 48, 64) zum Kühlen einer Tragstruktur eines Hitzeschildes (33, 60), mit A device (20, 29, 48, 64) for cooling a support structure of a heat shield (33, 60), with - einer Längsachse (21) und einem Kühlluftkanal (22),  a longitudinal axis (21) and a cooling air channel (22), - wobei die Vorrichtung (20, 29, 48, 64) mit der Längsachse (21) senkrecht zur Oberfläche (51) der Tragstruktur (34) an der Tragstruktur anordenbar ist, und in dieser Position  - Wherein the device (20, 29, 48, 64) with the longitudinal axis (21) perpendicular to the surface (51) of the support structure (34) can be arranged on the support structure, and in this position - der Kühlluftkanal (22) sich von einem zur Tragstruktur weisenden Ende (23) der Vorrichtung (20, 29, 48, 64) aus erstreckt und stromab mindestens einen Ausgangskanal (25a, 25b, 30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) umfasst, wobei der mindestens eine Ausgangskanal in Bezug auf die Längsachse (21) seitlich aus der Vorrichtung (20, 29, 48, 64) austritt, und - The cooling air duct (22) extending from an end facing the support structure (23) of the device (20, 29, 48, 64) and downstream at least one output channel (25a, 25b, 30a, 30b, 52a, 52b, 66a, 66b , 66c, 66d), wherein the at least one exit channel emerges laterally from the device (20, 29, 48, 64) with respect to the longitudinal axis (21), and - der Kühlluftkanal (22) mit mindestens einer in der Tragstruktur (34) angeordneten Kühlluftpassage (50) korrespondiert, und die Vorrichtung (20, 29, 48, 64) ein Gewindestift mit integriertem Kühlluftkanal (22) ist.  - The cooling air passage (22) with at least one in the support structure (34) arranged cooling air passage (50) corresponds, and the device (20, 29, 48, 64) is a threaded pin with integrated cooling air duct (22). 2. Vorrichtung nach Anspruch 1 , 2. Apparatus according to claim 1, dadurch gekennzeichnet, dass characterized in that der mindestens eine Ausgangskanal (30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) radial zur Längsachse (21) verläuft. the at least one output channel (30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) extends radially to the longitudinal axis (21). 3. Vorrichtung nach einem der Ansprüche 1 oder 2, 3. Device according to one of claims 1 or 2, dadurch gekennzeichnet, dass mindestens zwei gegenüberliegende Ausgangskanäle (25a, 25b, 30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) umfasst sind. characterized in that at least two opposing output channels (25a, 25b, 30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) are included. 4. Vorrichtung nach Anspruch 3, 4. Apparatus according to claim 3, dadurch gekennzeichnet, dass characterized in that die Vorrichtung vier Ausgangskanäle (66a, 66b, 66c, 66d) auf- weist. the device has four output channels (66a, 66b, 66c, 66d). 5. Hitzeschild (33, 60) für eine Brennkammer (10) einer Gasturbine (1), mit einer Tragstruktur (34) und einer Anzahl von Hitzeschildsteinen (35), welche an der Tragstruktur (34) mittels Steinhaltern (38, 39) lösbar befestigt sind, wobei jeder Hitzeschildstein (35) eine der Tragstruktur (34) zugewandte Kaltseite (36) und eine der Kaltseite gegenüberliegende, mit einem heißen Medium beaufschlagbare Heißseite (37) aufweist, und jeder Steinhalter (38, 39) mindestens einen Halteabschnitt (42, 43) zur Befestigung an einem Hitzeschildstein und einen an der Tagstruktur (34) befestigbaren Befestigungsabschnitt (40, 41) aufweist, wobei zum Schutz vor Heißgasen mindestens eine Kühlluftpassage (50) in der Tragstruktur (34) angeordnet ist, 5. heat shield (33, 60) for a combustion chamber (10) of a gas turbine (1), with a support structure (34) and a number of Heat shield bricks (35) which are releasably secured to the support structure (34) by means of stone holders (38, 39), each heat shield brick (35) having a cold side (36) facing the support structure (34) and a hot side opposite the cold side and each stone holder (38, 39) has at least one holding section (42, 43) for attachment to a heat shield brick and a fixing section (40, 41) which can be fastened to the tag structure (34), wherein for protection against hot gases at least one cooling air passage (50) is arranged in the support structure (34), d a d u r c h g e k e n n z e i c h n e t , d a s s an mindestens einer Kühlluftpassage (50) eine Vorrichtung (20, 29, 48, 64) gemäß einem der Ansprüche 1 bis 4 angeordnet ist und die Vorrichtung (20, 29, 48, 64) unterhalb eines Hitzeschildsteins (35) an der Tragstruktur (34) angeordnet ist. characterized in that arranged on at least one cooling air passage (50) is a device (20, 29, 48, 64) according to one of claims 1 to 4 and the device (20, 29, 48, 64) beneath a heat shield brick (35) on the Support structure (34) is arranged. 6. Hitzeschild (33, 60) nach Anspruch 5 , 6. heat shield (33, 60) according to claim 5, dadurch gekennzeichnet, dass characterized in that die Befestigungsabschnitte (40, 41) der Steinhalter (38, 39) innerhalb von in der Tragstruktur (34) verlaufenden Befestigungs-Nuten (55) lösbar befestigt sind, wobei die Kühlluftpassage (50) in den Nut-Boden (56) der Befestigungs-Nut (55) mündet, und die Vorrichtung (29, 48, 64) im Nut-Boden (56) an der Kühlluftpassage (50) angeordnet ist. the attachment sections (40, 41) of the stone holders (38, 39) are releasably secured within mounting grooves (55) extending in the support structure (34), the cooling air passage (50) being inserted into the groove bottom (56) of the attachment Groove (55) opens, and the device (29, 48, 64) in the groove bottom (56) on the cooling air passage (50) is arranged. 7. Hitzeschild (33, 60) nach Anspruch 6, 7. heat shield (33, 60) according to claim 6, dadurch gekennzeichnet, dass characterized in that die Vorrichtung (20, 29, 48, 64) zwischen zwei Befestigungsab- schnitten (40, 41) der Steinhalter (38, 39) im Wesentlichen mittig unter einem Hitzeschildstein (35) angeordnet ist. the device (20, 29, 48, 64) between two mounting sections (40, 41) of the stone holder (38, 39) is arranged substantially centrally under a heat shield brick (35). 8. Hitzeschild (60) nach Anspruch 6 oder 7, 8. heat shield (60) according to claim 6 or 7, dadurch gekennzeichnet, dass characterized in that im Nut-Boden (56) der Befestigungs-Nut (55) eine Kühlluft-Nut (62) verläuft und die Vorrichtung (20, 29, 48, 64) in die Kühlluftbohrung (50) mindestens auf Höhe des Nut-Bodens (56) abgesenkt ist, wobei sich die Ausgangskanäle (52a, 52b) der Vorrichtung (20, 29, 48, 64) in die Kühlluft-Nut (62) öffnen. in the groove bottom (56) of the fastening groove (55) extends a cooling air groove (62) and the device (20, 29, 48, 64) in the cooling air bore (50) at least at the level of the groove bottom (56) is lowered, wherein the output channels (52a, 52b) of the device (20, 29, 48, 64) open in the cooling air groove (62). 9. Hitzeschild (60) nach Anspruch 8, 9. heat shield (60) according to claim 8, dadurch gekennzeichnet, dass characterized in that die Kühlluft-Nut (62) an ihren Enden einen Auslauf (63) um- fasst . the cooling air groove (62) at its ends an outlet (63) summarizes. 10. Hitzeschild (33, 60) nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass 10. heat shield (33, 60) according to one of claims 5 to 9, characterized in that die Tragstruktur (34) und die Vorrichtung (20, 29, 48, 64) derart miteinander korrespondieren, dass die Vorrichtung (20, 29, 48, 64) zum Ein- und Ausbau der Hitzeschildsteine (35) in der Tragstruktur (34) versenkbar ist. the supporting structure (34) and the device (20, 29, 48, 64) correspond to one another in such a way that the device (20, 29, 48, 64) for mounting and dismounting the heat shield bricks (35) can be retracted in the supporting structure (34) is. 11. Brennkammer (10), welche mit einem Hitzeschild (33, 60) ausgekleidet ist, 11. combustion chamber (10), which is lined with a heat shield (33, 60), dadurch gekennzeichnet, dass characterized in that das Hitzeschild (33, 60) gemäß einem der Ansprüche 5 bis 10 ausgebildet ist. the heat shield (33, 60) is formed according to one of claims 5 to 10. 12. Gasturbine (1) mit mindestens einer Brennkammer (10), dadurch gekennzeichnet, dass 12. Gas turbine (1) with at least one combustion chamber (10), characterized in that mindestens eine Brennkammer (10) nach Anspruch 11 ausgebildet ist. at least one combustion chamber (10) according to claim 11 is formed.
EP13763244.4A 2012-09-21 2013-09-17 Device for cooling a supporting structure of a heat shield, and heat shield Active EP2883000B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13763244.4A EP2883000B1 (en) 2012-09-21 2013-09-17 Device for cooling a supporting structure of a heat shield, and heat shield

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12185435.0A EP2711630A1 (en) 2012-09-21 2012-09-21 Device for cooling a support structure of a heat shield and heat shield
PCT/EP2013/069215 WO2014044654A2 (en) 2012-09-21 2013-09-17 Device for cooling a supporting structure of a heat shield, and heat shield
EP13763244.4A EP2883000B1 (en) 2012-09-21 2013-09-17 Device for cooling a supporting structure of a heat shield, and heat shield

Publications (2)

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EP2883000A2 true EP2883000A2 (en) 2015-06-17
EP2883000B1 EP2883000B1 (en) 2018-10-31

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EP12185435.0A Withdrawn EP2711630A1 (en) 2012-09-21 2012-09-21 Device for cooling a support structure of a heat shield and heat shield
EP13763244.4A Active EP2883000B1 (en) 2012-09-21 2013-09-17 Device for cooling a supporting structure of a heat shield, and heat shield

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EP12185435.0A Withdrawn EP2711630A1 (en) 2012-09-21 2012-09-21 Device for cooling a support structure of a heat shield and heat shield

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US (1) US9702560B2 (en)
EP (2) EP2711630A1 (en)
KR (1) KR20150058383A (en)
CN (1) CN104718412B (en)
RU (1) RU2635742C2 (en)
WO (1) WO2014044654A2 (en)

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Also Published As

Publication number Publication date
EP2711630A1 (en) 2014-03-26
EP2883000B1 (en) 2018-10-31
CN104718412A (en) 2015-06-17
CN104718412B (en) 2017-06-09
RU2015114794A (en) 2016-11-10
WO2014044654A2 (en) 2014-03-27
RU2635742C2 (en) 2017-11-15
US9702560B2 (en) 2017-07-11
US20150285496A1 (en) 2015-10-08
WO2014044654A3 (en) 2014-05-30
KR20150058383A (en) 2015-05-28

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