EP2711630A1 - Device for cooling a support structure of a heat shield and heat shield - Google Patents
Device for cooling a support structure of a heat shield and heat shield Download PDFInfo
- Publication number
- EP2711630A1 EP2711630A1 EP12185435.0A EP12185435A EP2711630A1 EP 2711630 A1 EP2711630 A1 EP 2711630A1 EP 12185435 A EP12185435 A EP 12185435A EP 2711630 A1 EP2711630 A1 EP 2711630A1
- 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.)
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Classifications
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- 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
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- 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
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- 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
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- 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
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- 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
- 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
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- 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
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- 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
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 must 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 injected as a countermeasure through the gaps in the direction of the combustion chamber.
- a generic heat shield thus comprises a support structure and a number of heat shields, which are releasably secured to the support structure by means of stone holders, each heat shield brick having a support structure facing cold side and the cold side opposite, acted upon by a hot medium hot side.
- Each of the stone holders has at least one holding section for attachment on a heat shield brick 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 holders are inserted in this case with their attachment portions one after the other in the mounting grooves, with subsequent stone holder block the position of the 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.
- the EP 1 701 095 A1 discloses a heat shield of a combustor of a gas turbine having a support structure and a number of heat shield bricks disposed releasably on the support structure.
- the heat shield bricks are arranged across the surface, leaving expansion gaps on the support structure, wherein each heat shield brick has a cold-side facing the support structure and a hot side which is opposite to the cold side and can be charged with 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 in opposite directions, 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.
- openings are provided in the stone holders in the area of the holding section and in the holding bars of the heat shield bricks 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 outlet 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 can thus be flowed into the intermediate space between the cold side of the heat shield brick and the support structure when heat shield bricks are arranged on the support structure.
- the cooling air can be introduced into the intermediate space by means of the device from an elevated position above the support structure.
- the cooling air flows laterally out of 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.
- 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. O-surface unevennesses are not to be considered here.
- the apparatus for cooling the support structure on the support structure also includes those devices that are partially embedded in the support structure embedded therein or that are disposed 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.
- 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 can be particularly effectively avoided due to hot gas intake.
- 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.
- below a heat shield brick is here to be understood such that the device is arranged in a region of the support structure, which faces the cold side of the heat shield brick.
- the device can be arranged in particular below a heat shield brick in the vicinity of a fastening portion of a stone holder.
- the laterally exiting output channels can be inclined in the direction of the support structure and positioned so that the at least one exiting cooling air jet is directed to those structures that hold the stone holder in its attachment.
- the mounting portions of the stone holder are releasably secured within extending in the support structure mounting grooves 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.
- 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 height 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.
- 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 can be arranged in two interconvertible positions 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.
- a further 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.
- 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 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).
- the FIG. 2 schematically shows an inventive device 20 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 emerge laterally from the device with respect to the longitudinal axis 21 and opposite are arranged.
- 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.
- the cooling grommet is screwed into a provided with an internal thread cooling air hole 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 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 in FIG. 2 illustrateddemade 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 an inventive device 64 for cooling a support structure according to a third 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 that in FIG. 3 shown Cooled 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 section 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 36 facing the support structure 34 and a hot side 37 which is opposite the cold side 36 and can be charged with a hot medium.
- 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 resiliently held on the support structure 34 in this way, it is possible, when the hot side 37 is acted upon by hot gases, to produce hot gas in the expansion gaps between adjacent heat shield bricks.
- the gases which penetrate in the direction 45 are distributed here below 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 surface region of the support structure 35 facing the heat shield brick 35. This can lead to a scaling of the support structure 34 below the heat shield brick 35.
- 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 is according to the illustrated embodiment, a threaded pin with a longitudinal axis 21 and a cooling air passage 22.
- the device 48 may thus also be referred to asdemade 48.
- Thedemade 48 is arranged with its longitudinal axis 21 perpendicular to the surface 51 of the support structure on the support structure, wherein thedemade 48 is screwed with an end facing the support structure 23 in a cooling air passage 50 of 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.
- 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.
- 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 that in Fig. 5 shown heat shield 33 in a further sectional view taken along the plane marked with arrows VI-VI.
- the stone holders are held with their attachment portions in a mounting 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 so that the cooling grating 48 does not touch the cold side 36 of the heat shield block 35 and the cooling air from the output channels 52a, 52b flowing into the mounting groove 55 and due 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 according to a fifth embodiment.
- This is different from the one in Figure 5 represented in that in addition 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 holder can be moved over thedemade 48 away for installation and removal of the heat shield bricks 35 through the mounting groove.
- the function of thedemade 48 remains hereby.
- the effluent from thedemade 48 cooling air is injected into the cooling air groove 62 and flows at the ends by means of an outlet 63 in the gap 46 between the cold side of the heat shield brick 35 and the support structure 34 and cools the Support structure 34 below the heat shield brick 35 while avoiding a baffle cooling of the same.
- FIG. 8 shows that in Figure 7 illustrated heat shield 60 in a sectional view taken 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 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 up to the level of the groove bottom 56th lowered in the cooling air hole 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.
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- 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)
Abstract
Description
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 verwendet, 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 Hitzeschildelementen 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 eingedüst.In many technical applications heat shields are used, which must 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 holding elements, cooling air is injected as a countermeasure through the gaps in the direction of the combustion chamber.
Ein gattungsgemäßes Hitzeschild umfasst somit eine Tragstruktur und eine Anzahl von Hitzeschildsteinen, welche an der Tragstruktur mittels Steinhaltern lösbar befestigt sind, wobei jeder Hitzeschildstein eine der Tragstruktur zugewandte Kaltseite und eine der Kaltseite gegenüberliegende, mit einem heißen Medium beaufschlagbare Heißseite aufweist. Jeder der Steinhalter weist mindestens einen Halteabschnitt zur Befestigung an einem Hitzeschildstein und einen an der Tagstruktur befestigbaren Befestigungsabschnitt auf. Zum Schutz vor Heißgasen ist mindestens eine Kühlluftpassage in der Tragstruktur vorgesehen.A generic heat shield thus comprises a support structure and a number of heat shields, which are releasably secured to the support structure by means of stone holders, each heat shield brick having a support structure facing cold side and the cold side opposite, acted upon by a hot medium hot side. Each of the stone holders has at least one holding section for attachment on a heat shield brick 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 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.For fixing the stone holder to the support structure, circular circumferential and parallel fastening grooves may be provided in the support structure. The stone holders are inserted in this case with their attachment portions one after the other in the mounting grooves, with subsequent stone holder block the position of the 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
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 erstreckt 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 outlet 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 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.According to the invention, cooling air can thus be flowed into the intermediate space between the cold side of the heat shield brick and the support structure when heat shield bricks are arranged on the support structure. 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 cooling air flows laterally out of 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 Kühlluftpassage 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 passage can be aligned with each other or adjacent to each other. 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. O-berflächenunebenheiten 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. O-surface unevennesses are not to be considered here.
Das die Vorrichtung zum Kühlen der Tragstruktur an der Tragstruktur anordenbar ist, umfasst begrifflich auch solche Vorrichtungen, die teilweise in der Tragstruktur versenkt in dieser befestigt sind oder, die innerhalb einer in der Tragstruktur verlaufenden Ausnehmung angeordnet sind.Conceptually, the apparatus for cooling the support structure on the support structure also includes those devices that are partially embedded in the support structure embedded therein or that are disposed within a recess extending in the support structure.
Es kann vorteilhaft vorgesehen sein, dass die Vorrichtung ein Gewindestift mit integriertem Kühlluftkanal ist.It can be advantageously provided that the device is a threaded pin with integrated cooling air duct.
Diese Weiterbildung der Erfindung weist einen besonders einfachen Aufbau auf und ist somit mit geringen Herstellungskosten verbunden.This development of the invention has a particularly simple structure and is thus associated with low production costs.
Vorteilhafterweise kann weiter vorgesehen sein, dass der mindestens eine Ausgangskanal radial zur Längsachse verläuft.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.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.
Es kann auch als vorteilhaft angesehen werden, dass die Vorrichtung zwei gegenüberliegende Ausgangskanäle umfasst.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 Vorrichtung herum angeordneten Tragstrukturbereiche.This enables 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 besonders 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 can be particularly effectively avoided due to hot gas intake.
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 Kreuzungsbereiches 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.Preferably, however, the device is arranged below a heat shield block on the support structure.
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.The term "below a heat shield brick" is here to be understood such that the device is arranged in a region of the support structure, which faces the cold side of the heat shield brick.
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.According to this embodiment of the invention, the device can be arranged in particular below a heat shield brick in the vicinity of a fastening portion of a stone holder. Here, the laterally exiting output channels can be inclined in the direction of the support structure and positioned so that the at least one exiting cooling air jet is directed to those structures that hold the stone holder in its attachment.
Vorteilhafterweise sind die Befestigungsabschnitte der Steinhalter 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.Advantageously, the mounting portions of the stone holder are releasably secured within extending in the support structure mounting grooves 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.
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.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 height 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.It can also be considered advantageous that the cooling air groove comprises an outlet at its ends.
Dies ermöglicht einen strömungstechnisch verbesserten Austritt der Kühlluft aus der Kühlluft-Nut.This allows a fluidically improved outlet of the cooling air from the cooling air groove.
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.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 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.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 can be arranged in two interconvertible positions 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 Hitzeschildes besonders effektiv vermieden werden kann.A further 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 ausgebildet 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
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 acting components.
Dabei zeigt die
- Fig. 1
- eine schematische Darstellung einer Gasturbine nach dem Stand der Technik,
- Fig. 2
- schematisch eine erfindungsgemäße Vorrichtung zum Kühlen einer Tragstruktur eines Hitzeschildes gemäß einem ersten Ausführungsbeispiel in einer Schnittansicht,
- Fig. 3
- schematisch einen Querschnitt durch eine erfindungsgemäße Vorrichtung zum Kühlen der Tragstruktur gemäß einem zweiten Ausführungsbeispiel,
- Fig. 4
- schematisch einen Querschnitt einer erfindungsgemäßen Vorrichtung gemäß einem dritten Ausführungsbeispiel,
- Fig. 5
- schematisch einen Ausschnitt eines erfindungsgemäßen Hitzeschildes mit einer an der Tragstruktur angeordneten Vorrichtung zum Kühlen der Tragstruktur gemäß einem vierten Ausführungsbeispiel,
- Fig. 6
- eine schematische Darstellung des in
Fig.5 dargestellten Hitzeschilds in einer weiteren Schnittansicht entlang der inFig.5 durch die Pfeile VI-VI gekennzeichneten Ebene, - Fig. 7
- schematisch einen Ausschnitt eines erfindungsgemäßen Hitzeschildes gemäß einem fünften Ausführungsbeispiel in einer Schnittansicht und
- Fig. 8
- das in
Fig.7 dargestellte Hitzeschild in einer Schnittansicht entlang der inFig.7 durch die Pfeile VIII-VIII gekennzeichneten Ebene.
- Fig. 1
- a schematic representation of a gas turbine according to the prior art,
- Fig. 2
- 1 is a schematic sectional view of a device according to the invention for cooling a support structure of a heat shield according to a first exemplary embodiment;
- Fig. 3
- 1 is a schematic cross-section of a device according to the invention for cooling the support structure according to a second embodiment,
- Fig. 4
- FIG. 2 schematically a cross section of a device according to the invention according to a third embodiment, FIG.
- Fig. 5
- 2 schematically shows a detail of a heat shield according to the invention with a device arranged on the support structure for cooling the support structure according to a fourth exemplary embodiment,
- Fig. 6
- a schematic representation of the in
Figure 5 shown heat shield in a further sectional view along the inFigure 5 level indicated by the arrows VI-VI, - Fig. 7
- schematically a section of a heat shield according to the invention according to a fifth embodiment in a sectional view and
- Fig. 8
- this in
Figure 7 shown heat shield in a sectional view along the inFigure 7 indicated by the arrows VIII-VIII level.
Die
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 Laufschaufeln 18 einer Reihe beispielsweise mittels einer Turbinenscheibe am Rotor 3 angebracht sind. An dem Rotor 3 angekoppelt ist beispielsweise ein Generator (nicht dargestellt).The
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
Die
Die
Die
Die
Die
Die
Die
Claims (14)
dadurch gekennzeichnet, dass
die Vorrichtung (20, 29, 48, 64) ein Gewindestift mit integriertem Kühlluftkanal (22) ist.Device according to claim 1,
characterized in that
the device (20, 29, 48, 64) is a threaded pin with integrated cooling air duct (22).
dadurch gekennzeichnet, dass
der mindestens eine Ausgangskanal (30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) radial zur Längsachse (21) verläuft.Device according to one of claims 1 or 2,
characterized in that
the at least one output channel (30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) extends radially to the longitudinal axis (21).
dadurch gekennzeichnet, dass mindestens zwei gegenüberliegende Ausgangskanäle (25a, 25b, 30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) umfasst sind.Device according to one of claims 1 to 3,
characterized in that at least two opposing output channels (25a, 25b, 30a, 30b, 52a, 52b, 66a, 66b, 66c, 66d) are included.
dadurch gekennzeichnet, dass
die Vorrichtung vier Ausgangskanäle (66a, 66b, 66c, 66d) aufweist.Device according to claim 4,
characterized in that
the device has four output channels (66a, 66b, 66c, 66d).
dadurch gekennzeichnet, dass an mindestens einer Kühlluftpassage (50) eine Vorrichtung (20, 29, 48, 64) gemäß einem der Ansprüche 1 bis 5 angeordnet ist.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) wherein each heat shield brick (35) has a cold side (36) facing the support structure (34) and a hot side (37) facing the cold side, which can be charged with a hot medium, and each brick holder (38, 39) has at least one holding section (42, 43 ) for attachment to a heat shield brick and to the Tagstruktur (34) attachable mounting portion (40, 41), wherein for protection against hot gases at least one cooling air passage (50) in the support structure (34) is arranged,
characterized in that at least one cooling air passage (50), a device (20, 29, 48, 64) according to one of claims 1 to 5 is arranged.
dadurch gekennzeichnet, dass
die Vorrichtung (20, 29, 48, 64) unterhalb eines Hitzeschildsteins (35) an der Tragstruktur (34) angeordnet ist.Heat shield (33, 60) according to claim 6,
characterized in that
the device (20, 29, 48, 64) is arranged below a heat shield block (35) on the support structure (34).
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.Heat shield (33, 60) according to one of claims 6 or 7, characterized in that
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.
dadurch gekennzeichnet, dass
die Vorrichtung (20, 29, 48, 64)zwischen zwei Befestigungsabschnitten (40, 41) der Steinhalter (38, 39) im Wesentlichen mittig unter einem Hitzeschildstein (35) angeordnet ist.Heat shield (33, 60) according to claim 8,
characterized in that
the device (20, 29, 48, 64) between two attachment portions (40, 41) of the stone holder (38, 39) is arranged substantially centrally under a heat shield brick (35).
dadurch gekennzeichnet, dass
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.A heat shield (60) according to claim 8 or 9,
characterized in that
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).
dadurch gekennzeichnet, dass
die Kühlluft-Nut (62) an ihren Enden einen Auslauf (63) umfasst.A heat shield (60) according to claim 10,
characterized in that
the cooling air groove (62) has an outlet (63) at its ends.
dadurch gekennzeichnet, dass
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.Heat shield (33, 60) according to one of claims 6 to 11,
characterized in that
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.
dadurch gekennzeichnet, dass
das Hitzeschild (33, 60) gemäß einem der Ansprüche 6 bis 12 ausgebildet ist.Combustion chamber (10), which is lined with a heat shield (33, 60),
characterized in that
the heat shield (33, 60) is formed according to one of claims 6 to 12.
dadurch gekennzeichnet, dass
mindestens eine Brennkammer (10) nach Anspruch 13 ausgebildet ist.Gas turbine (1) with at least one combustion chamber (10),
characterized in that
at least one combustion chamber (10) according to claim 13 is formed.
Priority Applications (7)
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 |
KR1020157009794A KR20150058383A (en) | 2012-09-21 | 2013-09-17 | Device for cooling a supporting structure of a heat shield, and heat shield |
US14/429,737 US9702560B2 (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 |
CN201380053375.8A CN104718412B (en) | 2012-09-21 | 2013-09-17 | Device and heat shielding for cooling down the supporting structure of heat shielding |
RU2015114794A RU2635742C2 (en) | 2012-09-21 | 2013-09-17 | Heat shield with device for cooling its carrying structure |
Applications Claiming Priority (1)
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 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2711630A1 true EP2711630A1 (en) | 2014-03-26 |
Family
ID=46963540
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13763244.4A Active EP2883000B1 (en) | 2012-09-21 | 2013-09-17 | Device for cooling a supporting structure of a heat shield, and heat shield |
Country Status (6)
Country | Link |
---|---|
US (1) | US9702560B2 (en) |
EP (2) | EP2711630A1 (en) |
KR (1) | KR20150058383A (en) |
CN (1) | CN104718412B (en) |
RU (1) | RU2635742C2 (en) |
WO (1) | WO2014044654A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015206033A1 (en) | 2015-04-02 | 2016-10-06 | Siemens Aktiengesellschaft | stone holder |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015023576A1 (en) * | 2013-08-15 | 2015-02-19 | United Technologies Corporation | Protective panel and frame therefor |
US20160313005A1 (en) * | 2015-04-23 | 2016-10-27 | United Technologies Corporation | Additive manufactured combustor heat shield with cooled attachment stud |
DE102016211613A1 (en) * | 2016-06-28 | 2017-12-28 | Siemens Aktiengesellschaft | Heat shield arrangement of a combustion chamber with disc spring package |
US10619857B2 (en) * | 2017-09-08 | 2020-04-14 | United Technologies Corporation | Cooling configuration for combustor attachment feature |
US10670275B2 (en) | 2017-09-08 | 2020-06-02 | Raytheon Technologies Corporation | Cooling configurations for combustor attachment features |
US10670274B2 (en) | 2017-09-08 | 2020-06-02 | Raytheon Technologies Corporation | Cooling configurations for combustor attachment features |
US10670273B2 (en) * | 2017-09-08 | 2020-06-02 | Raytheon Technologies Corporation | Cooling configurations for combustor attachment features |
GB201720121D0 (en) * | 2017-12-04 | 2018-01-17 | Siemens Ag | Heatshield for a gas turbine engine |
EP3839347A1 (en) * | 2019-12-20 | 2021-06-23 | Siemens Aktiengesellschaft | Heat shield tile of a combustion chamber |
EP3845810B1 (en) * | 2019-12-31 | 2023-11-22 | ANSALDO ENERGIA S.p.A. | Supporting device for a heat-insulating tiles of a combustion chamber of a gas turbine assembly for power plants and a gas turbine assembly |
RU209216U1 (en) * | 2021-08-30 | 2022-02-07 | Антон Владимирович Новиков | HEAT SHIELD FOR GAS TURBINE COMBUSTION CHAMBER |
CN114151227B (en) * | 2021-10-20 | 2023-05-05 | 中国航发四川燃气涡轮研究院 | Heat shield structure for binary vector spray pipe |
RU209161U1 (en) * | 2021-12-01 | 2022-02-03 | Антон Владимирович Новиков | HEAT SHIELD FOR GAS TURBINE COMBUSTION CHAMBER |
Citations (6)
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EP0224817A1 (en) * | 1985-12-02 | 1987-06-10 | Siemens Aktiengesellschaft | Heat shield arrangement, especially for the structural components of a gas turbine plant |
US4820097A (en) * | 1988-03-18 | 1989-04-11 | United Technologies Corporation | Fastener with airflow opening |
DE19730751A1 (en) * | 1996-07-24 | 1998-01-29 | Siemens Ag | Ceramic component for heat-protective cladding |
EP1126221A1 (en) * | 2000-02-17 | 2001-08-22 | Siemens Aktiengesellschaft | Padded refactory tile as liner for a gas turbine combustor |
EP1701095A1 (en) | 2005-02-07 | 2006-09-13 | Siemens Aktiengesellschaft | Heat shield |
EP2261564A1 (en) * | 2009-06-09 | 2010-12-15 | Siemens Aktiengesellschaft | Heat shield element assembly with screw guiding means and method for installing same |
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US4749298A (en) | 1987-04-30 | 1988-06-07 | United Technologies Corporation | Temperature resistant fastener arrangement |
DE58908665D1 (en) * | 1988-06-13 | 1995-01-05 | Siemens Ag | HEAT SHIELD ARRANGEMENT WITH LOW COOLING FLUID REQUIREMENT. |
RU2088836C1 (en) * | 1990-11-29 | 1997-08-27 | Сименс АГ | Heat shield |
US5431020A (en) * | 1990-11-29 | 1995-07-11 | Siemens Aktiengesellschaft | Ceramic heat shield on a load-bearing structure |
DE50111316D1 (en) * | 2001-08-28 | 2006-12-07 | Siemens Ag | Heat shield stone and use of a heat shield stone in a combustion chamber |
EP1561997A1 (en) * | 2004-01-27 | 2005-08-10 | Siemens Aktiengesellschaft | Heat Shield |
EP1715248A1 (en) * | 2005-04-19 | 2006-10-25 | Siemens Aktiengesellschaft | Holding element and heatshield member for a heatshield and combustion chamber including said heatshield |
EP2236928A1 (en) | 2009-03-17 | 2010-10-06 | Siemens Aktiengesellschaft | Heat shield element |
EP2230454A1 (en) | 2009-03-18 | 2010-09-22 | Siemens Aktiengesellschaft | Device for mounting a heat shield element |
ES2531099T3 (en) | 2009-06-09 | 2015-03-10 | Siemens Ag | Thermal shield element arrangement and procedure for mounting a thermal shield element |
-
2012
- 2012-09-21 EP EP12185435.0A patent/EP2711630A1/en not_active Withdrawn
-
2013
- 2013-09-17 CN CN201380053375.8A patent/CN104718412B/en active Active
- 2013-09-17 KR KR1020157009794A patent/KR20150058383A/en not_active Application Discontinuation
- 2013-09-17 EP EP13763244.4A patent/EP2883000B1/en active Active
- 2013-09-17 RU RU2015114794A patent/RU2635742C2/en active
- 2013-09-17 WO PCT/EP2013/069215 patent/WO2014044654A2/en active Application Filing
- 2013-09-17 US US14/429,737 patent/US9702560B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0224817A1 (en) * | 1985-12-02 | 1987-06-10 | Siemens Aktiengesellschaft | Heat shield arrangement, especially for the structural components of a gas turbine plant |
US4820097A (en) * | 1988-03-18 | 1989-04-11 | United Technologies Corporation | Fastener with airflow opening |
DE19730751A1 (en) * | 1996-07-24 | 1998-01-29 | Siemens Ag | Ceramic component for heat-protective cladding |
EP1126221A1 (en) * | 2000-02-17 | 2001-08-22 | Siemens Aktiengesellschaft | Padded refactory tile as liner for a gas turbine combustor |
EP1701095A1 (en) | 2005-02-07 | 2006-09-13 | Siemens Aktiengesellschaft | Heat shield |
EP2261564A1 (en) * | 2009-06-09 | 2010-12-15 | Siemens Aktiengesellschaft | Heat shield element assembly with screw guiding means and method for installing same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015206033A1 (en) | 2015-04-02 | 2016-10-06 | Siemens Aktiengesellschaft | stone holder |
Also Published As
Publication number | Publication date |
---|---|
EP2883000B1 (en) | 2018-10-31 |
RU2635742C2 (en) | 2017-11-15 |
WO2014044654A2 (en) | 2014-03-27 |
CN104718412A (en) | 2015-06-17 |
RU2015114794A (en) | 2016-11-10 |
US9702560B2 (en) | 2017-07-11 |
EP2883000A2 (en) | 2015-06-17 |
WO2014044654A3 (en) | 2014-05-30 |
US20150285496A1 (en) | 2015-10-08 |
CN104718412B (en) | 2017-06-09 |
KR20150058383A (en) | 2015-05-28 |
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