EP2711633A1 - Holder element for holding a heat shield and method for cooling the support structure of a heat shield - Google Patents
Holder element for holding a heat shield and method for cooling the support structure of a heat shield Download PDFInfo
- Publication number
- EP2711633A1 EP2711633A1 EP12185430.1A EP12185430A EP2711633A1 EP 2711633 A1 EP2711633 A1 EP 2711633A1 EP 12185430 A EP12185430 A EP 12185430A EP 2711633 A1 EP2711633 A1 EP 2711633A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling air
- heat shield
- support structure
- air passage
- holding
- 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
- F23R3/005—Combined with pressure or heat exchangers
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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
- F23R3/002—Wall structures
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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
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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
- F23R3/42—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
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
Definitions
- the invention relates to a holding element for holding a heat shield brick held on a support structure and to a method for cooling the support structure of a heat shield.
- the invention also relates to such a heat shield and a combustion chamber lined by the heat shield and a gas turbine.
- 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 holding elements, each heat shield brick having a support structure facing cold side and the cold side opposite, acted upon by a hot medium hot side.
- at least one cooling air passage is provided in the support structure.
- the generic holding element has a fastening portion attachable to the support structure and a holding portion with a holding head, which is designed to engage in an existing on the heat shield stone engaging device.
- the attachment section When the attachment section is fastened to the support structure and the retaining section engaging the heat shield block, the attachment section has an upper side which faces a cold side of the heat shield block.
- the EP 1 701 095 A1 discloses an initially mentioned 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 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 two metallic holding elements each.
- each retaining element comprises a holding portion with a gripping portion and a fixing portion.
- each heat shield brick retaining grooves are introduced on two opposite circumferential sides, so that for holding the heat shield brick, the gripping portions of the holding elements opposite can engage in the retaining grooves.
- the holding elements which are fastened on the heat shield block in opposite directions are guided with their attachment section in a fastening groove extending below the heat shield block in the support structure.
- the gripping portions of the metallic stone holder are cooled.
- openings are made in the stone holder in the region of the holding section and in the retaining bolts of the heat shield bricks, which are aligned with a cooling air hole arranged in the support structure, so that cooling air from the cooling air bore flows in a direct line against a cold side of the gripping section.
- Another object of the invention is to provide a combustion chamber and a gas turbine, with which a scaling of the support structure of a heat shield covered by the combustion chamber can be particularly effectively avoided.
- the object is achieved in a holding element of the type mentioned above in that at least one cooling air passage is arranged in the attachment portion.
- the cooling air passage comprises an inlet opening and at least one outlet opening arranged in a side surface and / or on the top side of the fastening section. Cooling air entering the inlet opening emerges from the at least one outlet opening, whereby an outflow direction can be imposed on the cooling air by means of the cooling air passage, which comprises a velocity component parallel to the cold side and avoids impact cooling of the heat shield block held by the holding section.
- the attachment section can be arranged on the support structure such that the cooling air passage corresponds to at least one cooling air passage arranged in the support structure.
- the inventive design of the retaining element allows cooling air in the region of the mounting portion below to supply a heat shield of a heat shield. Because of this cooling air flowing in substantially centrally under the heat shield brick, the support structure can be effectively cooled in the areas which serve to secure the heat shield stones.
- the resilient retaining elements which are also referred to with stone holders, are mounted substantially centrally below the heat shield bricks. With the invention, this area is effectively cooled, with a direct flow of the heat shield bricks is prevented by means of the inventively designed stone holder. Damage to the heat shield stones is thus safely avoided.
- the heat shield bricks are generally made of a ceramic material and are in operation on your hot side directly in contact with the hot gases in the combustion chamber.
- the cooling air passage integrated in the fastening section can be fed with suitable positioning of the stone holder on the support structure by at least one cooling air duct in the support structure. That the cooling air passage corresponds to the cooling air passage is to be understood such that the stone holder can be positioned on the support structure in such a way that cooling air flowing from the cooling air passage at least partially enters the inlet opening of the cooling air passage.
- the inlet opening of the cooling air passage and the outlet opening of the cooling air passage can be aligned with each other, for example.
- the stone holder is only to be positioned at a suitable location on the support structure, whereby a simple installation or removal of the heat shield stones for maintenance purposes is possible.
- the retaining elements may be guided in fastening grooves, wherein the cooling air channels arranged in the support structure are arranged in a groove bottom of the fastening groove.
- the stone holder can hereby Maintenance purposes are pushed over the cooling air channels away.
- the cooling air passage can be arranged, for example, in the end region of the fastening section facing away from the holding section.
- the flow direction of the cooling air when leaving an outlet opening of the cooling air passage can be directed by appropriate design of the cooling air passage on a region to be cooled of the support structure.
- the direction of the total momentum of a cooling air flow leaving an exit opening of the cooling air passage is not directed to the heat shield.
- the respective outflow direction has a velocity component which runs parallel to the cold side of the heat shield brick and avoids impact cooling of the heat shield brick.
- the cooling air passage corresponds to a survey formed on the top of the mounting portion survey.
- This embodiment of the invention makes it possible to arrange the at least one outlet opening of the cooling air passage laterally in the survey.
- the attachment portion is thickened in the region of the survey.
- the cooling air passage can be arranged, for example, within the attachment section.
- a cooling air hole arranged in the fastening section which comprises at least one outlet opening arranged in a side surface of the elevation.
- the cooling air bore may, for example, have a T-shaped profile.
- the attachment portion is stepped in the region of the survey.
- the cooling air passage may be formed as arranged below the step groove.
- the groove may have two opposite side surfaces.
- the groove could also include only one side surface.
- the cooling air passage thus comprises two outlet openings, which are arranged in a side surface of the fastening portion.
- the cooling air passage may include further outlet openings arranged in the elevation.
- the elevation is step-shaped and comprises at least one side surface pointing in the direction of the holding section.
- at least one outlet opening of the cooling air passage is arranged in this side surface.
- the flow direction of the cooling air emerging from the cooling air passage can be directed to the side edges of the fastening section.
- the fastening section comprises an elongate base plate, at one end face of which the holding section adjoins and at the other end face of which the base plate is offset in the direction of heat shield block a blocking plate is arranged.
- a blocking plate is arranged.
- a step-shaped elevation is formed in the top of the mounting portion by means of the blocking plate.
- the cooling air passage is bounded at least by the underside of the blockade plate and the portion of the end face of the base plate running below the blocking plate.
- This embodiment of the invention has a particularly simple structure.
- the holding element according to the invention for example, by attaching a blockade plate on the Surface of a conventional mounting portion can be realized.
- Another object of the invention is to provide an aforementioned heat shield, with which a scaling of the support structure can be particularly effectively avoided due to hot gas intake.
- At least one holding element encompassed by the heat shield is designed according to one of claims 1 to 7.
- At least one cooling air channel arranged in the supporting structure corresponds to the retaining element, so that cooling air flowing from the cooling air channel at at least one of the heat shield stones fastened to the supporting structure enters the inlet opening of the cooling air passage at least partially.
- a cooling air channel arranged in the support structure corresponds to the retaining element is to be understood such that the retaining element with its fastening section can be positioned on the support structure such that the cooling air flowing out of the cooling air channel at least partially enters the inlet opening of the cooling air passage.
- the heat shield according to claim 8 is formed or formed at least one combustion chamber according to claim 9.
- the heat shield used in the method comprises a number of heat shield bricks releasably attachable to the support structure.
- the heat shield bricks are fastened by means of retaining elements on the support structure.
- cooling air is conducted from the supporting structure along at least one upper side and / or side surface of the fastening section along a cooling air passage formed by the fastening section of a retaining element.
- the cooling air is hereby impressed by means of the cooling air passage a flow direction, which avoids an impact cooling of the heat shield brick.
- cooling air is impressed on a flow direction is to be understood such that the cooling air exits from one or more outlet openings of the cooling air passage.
- Each of these cooling air flows at the exit on an optionally pointing in different directions total pulse.
- an impingement cooling of the heat shield is avoided.
- Such a total pulse thus always has a velocity component parallel to the cold side of the heat shield brick and is not directed directly to this.
- the cooling air is directed at exit from the cooling air passage to at least a portion of the support structure to which a mounting portion of a holding element is attached.
- the cooling air flowing along the cooling air passage is directed to a groove edge of a fastening groove.
- 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 14 and an exhaust housing 15.
- the housing 12 is for protection Hot gases lined with a heat shield (not shown).
- 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. Viewed in the flow direction of a working medium follows in the hot runner formed by a number 17 vanes row formed from blades 18 row.
- 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 a retaining element according to the invention 22 according to a first embodiment in a perspective view.
- the exemplary embodiment of the retaining element 22 comprises a rectangular, plate-shaped fastening section 23, at one end face of which a retaining section 24 connects at right angles.
- the holding portion 24 comprises a holding head 25, which is designed to engage in an engagement device (not shown) on a heat shield brick.
- the attachment portion 23 has an upper side 28. For fixing the holding element 22 to a support structure (not shown), the attachment portion 23 is widened in sections. This broadening the attachment portion 23 is also referred to as shoe 29.
- the shoe 29 is adjoined by an elevation 30 arranged on the upper side 28 of the fastening section 23, so that the fastening section is thickened in the region of the elevation 30.
- the term "side surface of the fastening portion 23" also includes the side surface 32.
- the fastening portion 23 shown comprises a cooling air passage through the thickened region of the fastening portion 23 runs.
- the cooling air passage 34 thus corresponds to the elevation 30 formed on the upper side of the fastening portion.
- the cooling air passage 34 comprises an inlet opening 35 and two outlet openings 37 and 38.
- the outlet openings 37, 38 are arranged in opposite side surfaces 32, 39 of the fastening section.
- the illustrated cooling air passage 34 is a cooling air bore, which has an outlet opening 38 arranged in the side area 32 of the elevation 30 which points in the direction of the holding section 24.
- a cooling air flow which enters the cooling air passage 34 through the inlet opening 35, is divided into two streams by the passage of the T-shaped cooling air passage 34 and exits the cooling air passage 34 through the outlet openings 37 and 38.
- an outflow direction is imparted to the cooling air, which runs parallel to the upper side of the fastening section 23. An impingement cooling of structures arranged above the holding element 22 (not shown) is thereby avoided.
- FIG. 3 shows a section of a heat shield 42 according to the invention with a support structure 43 and a support member attached to the support member 22, which accordingly Fig.2 is designed.
- the holding element 22 rests with its attachment section 23 on the support structure 43 and has a holding section 24 for holding a heat shield block (not shown). In this position is the upper side 28 of the attachment portion 23 faces a cold side of a heat shield block held by the holding portion 24 (not shown).
- the in Fig.2 described cooling air passage 34 shown in a longitudinal section.
- the inlet opening 35 of the cooling air passage 34 is in alignment with a cooling air duct 45 arranged in the support structure.
- the fastening section 23 is arranged on the support structure 43 such that the cooling air passage 34 corresponds to a cooling air duct 45 arranged in the support structure 43.
- two flow paths 47 and 48 are shown by way of example, along which part of the cooling air flowing out of the cooling air duct 45 passes through the cooling air passage 34.
- the cooling air is impressed by means of the cooling air passage 34, an outflow direction 50 and 51, which comprises a velocity component parallel to the cold side of a heat shield block held by the holding member and avoids impact cooling of the heat shield brick.
- FIG. 4 shows an inventive retaining element 54 according to a second embodiment.
- the holding member 54 is different from that in FIG Fig.2
- the mounting portion 23 in this case comprises an elongated base plate 57, at one end face of the holding portion 24 connects and at the other end face 58 to the base plate 57 in the direction of heat shield stone (not shown) offset a blocking plate 60 is arranged is.
- a step-shaped elevation 30 is formed in the upper side of the fastening section 23, and the fastening section 23 is steppedly offset.
- the cooling air passage 55 is delimited by the underside of the blockage plate 60 and the front side 58 of the base plate 57 running below the blocking plate.
- the cooling air passage 55 thus comprises an outlet opening 62 arranged in the side faces of the fastening section 23 and encircling the end of the fastening section 23.
- the cooling air is impressed with an outflow direction 59, 61, 63 when passing through the cooling air passage 55, which runs parallel to the cold side of a heat shield block held by the holding section.
- FIG. 5 shows a section of a heat shield 64 according to the invention with a support structure 43 and a support member fixed to the support member 54, which accordingly Figure 4 is designed.
- the mounting portion 23 comprising the base plate 57 and the blocking plate 60 is fixed to the support structure 43 such that a cooling air passage 45 communicates with the cooling air passage 55.
- Cooling air which flows along the exemplified flow paths 65 and 66 from the cooling air passage 45 into the inlet opening 68 of the cooling air passage 55 and out of the outlet opening 62, by means of the cooling air passage 55 an outflow direction 59, 61, 63 impressed.
- the outflow direction in the illustrated embodiment is parallel to the cold side of a heat shield block held by the holding section 24 (not shown).
- the illustrated embodiment is particularly well suited for cooling the groove edges of a mounting groove (not shown) in which the retaining element 54 is secured to the support structure.
- a direction parallel to the cold side of the heat shield brick is synonymous with a direction parallel to the heat shield brick facing surface of the support structure. Surface irregularities of the support structure are not taken into account.
Abstract
Description
Die Erfindung bezieht sich auf ein Halteelement zum Halten eines an einer Tragstruktur gehaltenen Hitzeschildsteines und auf ein Verfahren zum Kühlen der Tragstruktur eines Hitzeschildes. Die Erfindung bezieht sich auch auf ein derartiges Hitzeschild sowie eine von dem Hitzeschild ausgekleidete Brennkammer und eine Gasturbine.The invention relates to a holding element for holding a heat shield brick held on a support structure and to a method for cooling the support structure of a heat shield. The invention also relates to such a heat shield and a combustion chamber lined by the heat shield and a gas turbine.
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 Halteelementen lösbar befestigt sind, wobei jeder Hitzeschildstein eine der Tragstruktur zugewandte Kaltseite und eine der Kaltseite gegenüberliegende, mit einem heißen Medium beaufschlagbare Heißseite aufweist. 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 holding elements, each heat shield brick having a support structure facing cold side and the cold side opposite, acted upon by a hot medium hot side. For protection against hot gases, at least one cooling air passage is provided in the support structure.
Das gattungsgemäße Halteelement weist einen an der Tragstruktur befestigbaren Befestigungsabschnitt und einen Halteabschnitt mit einem Haltekopf auf, der zum Eingriff in eine am Hitzeschildstein vorhandene Eingriffeinrichtung ausgebildet ist. Der Befestigungsabschnitt weist bei an der Tragstruktur befestigtem Befestigungsabschnitt und am Hitzeschildstein eingreifendem Halteabschnitt eine Oberseite auf, welche einer Kaltseite des Hitzeschildsteins zugewandt ist.The generic holding element has a fastening portion attachable to the support structure and a holding portion with a holding head, which is designed to engage in an existing on the heat shield stone engaging device. When the attachment section is fastened to the support structure and the retaining section engaging the heat shield block, the attachment section has an upper side which faces a cold side of the heat shield block.
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 der Hitzeschildsteine 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 bricks and lead to scaling of the support structure.
Es ist daher Aufgabe der vorliegenden Erfindung, ein Halteelement für einen an einer Tragstruktur gehaltenen Hitzeschildstein, ein Hitzeschild mit einer Tragstruktur und ein Verfahren zur Kühlung der Tragstruktur 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 holding element for a support structure held on a heat shield stone, a heat shield with a support structure and a method for cooling the support structure, with which a scaling of the support structure due to hot gas intake can be particularly effectively avoided.
Eine weitere Aufgabe der Erfindung ist es, eine Brennkammer und eine Gasturbine anzugeben, mit welcher eine Verzunderung der Tragstruktur eines von der Brennkammer umfassten Hitzeschildes besonders effektiv vermieden werden kann.Another object of the invention is to provide a combustion chamber and a gas turbine, with which a scaling of the support structure of a heat shield covered by the combustion chamber can be particularly effectively avoided.
Die Aufgabe wird erfindungsgemäß bei einem Halteelement der eingangs genannten Art dadurch gelöst, dass mindestens eine Kühlluftpassage im Befestigungsabschnitt angeordnet ist. Die Kühlluftpassage umfasst eine Eintrittsöffnung und mindestens eine in einer Seitenfläche und/oder auf der Oberseite des Befestigungsabschnitts angeordnete Austrittsöffnung. In die Eintrittsöffnung eintretende Kühlluft tritt aus der mindestens einen Austrittsöffnung aus, wobei der Kühlluft mittels der Kühlluftpassage jeweils eine Ausströmrichtung aufprägbar ist, welche eine Geschwindigkeitskomponente parallel zur Kaltseite umfasst und eine Prallkühlung des vom Halteabschnitt gehaltenen Hitzeschildsteines vermeidet.The object is achieved in a holding element of the type mentioned above in that at least one cooling air passage is arranged in the attachment portion. The cooling air passage comprises an inlet opening and at least one outlet opening arranged in a side surface and / or on the top side of the fastening section. Cooling air entering the inlet opening emerges from the at least one outlet opening, whereby an outflow direction can be imposed on the cooling air by means of the cooling air passage, which comprises a velocity component parallel to the cold side and avoids impact cooling of the heat shield block held by the holding section.
Der Befestigungsabschnitt ist hierzu derart an der Tragstruktur anordenbar, dass die Kühlluftpassage mit mindestens einem in der Tragstruktur angeordneten Kühlluftkanal korrespondiert.For this purpose, the attachment section can be arranged on the support structure such that the cooling air passage corresponds to at least one cooling air passage arranged in the support structure.
Die erfindungsgemäße Ausgestaltung des Halteelementes ermöglicht es Kühlluft im Bereich des Befestigungsabschnittes unterhalb eines Hitzeschildsteins eines Hitzeschildes zuzuführen. Aufgrund dieser im Wesentlichen mittig unter dem Hitzeschildstein einströmenden Kühlluft lässt sich die Tragstruktur effektiv in den Bereichen kühlen, welche der Befestigung der Hitzeschildsteine dienen. Die federnden Halteelemente, welche auch mit Steinhaltern bezeichnet werden, sind im Wesentlichen mittig unterhalb der Hitzeschildsteine befestigt. Mit der Erfindung wird dieser Bereich effektiv gekühlt, wobei eine direkte Anströmung der Hitzeschildsteine mittels der erfindungsgemäß ausgebildeten Steinhalter unterbunden ist. Eine Schädigung der Hitzeschildsteine wird somit sicher vermieden. Die Hitzeschildsteine bestehen im Allgemeinen aus einem keramischen Material und sind im Betrieb auf Ihrer Heißseite direkt mit den Heißgasen in der Brennkammer in Berührung. Eine Prallkühlung der Hitzeschildsteine von der Kaltseite aus könnte zu thermisch induzierten Spannungen im Hitzeschildstein und damit zu erhöhter Rissbildung in diesem führen. Erfindungsgemäß ist die in den Befestigungsabschnitt integrierte Kühlluftpassage bei geeigneter Positionierung des Steinhalters an der Tragstruktur durch mindestens einen Kühlluftkanal in der Tragstruktur speisbar. Dass die Kühlluftpassage mit dem Kühlluftkanal korrespondiert ist derart zu verstehen, dass der Steinhalter an der Tragstruktur derart positionierbar ist, dass aus dem Kühlluftkanal strömende Kühlluft zumindest teilweise in die Eintrittsöffnung der Kühlluftpassage eintritt.The inventive design of the retaining element allows cooling air in the region of the mounting portion below to supply a heat shield of a heat shield. Because of this cooling air flowing in substantially centrally under the heat shield brick, the support structure can be effectively cooled in the areas which serve to secure the heat shield stones. The resilient retaining elements, which are also referred to with stone holders, are mounted substantially centrally below the heat shield bricks. With the invention, this area is effectively cooled, with a direct flow of the heat shield bricks is prevented by means of the inventively designed stone holder. Damage to the heat shield stones is thus safely avoided. The heat shield bricks are generally made of a ceramic material and are in operation on your hot side directly in contact with the hot gases in the combustion chamber. An impingement cooling of the heat shield bricks from the cold side could lead to thermally induced stresses in the heat shield brick and thus to increased crack formation in the latter. According to the invention, the cooling air passage integrated in the fastening section can be fed with suitable positioning of the stone holder on the support structure by at least one cooling air duct in the support structure. That the cooling air passage corresponds to the cooling air passage is to be understood such that the stone holder can be positioned on the support structure in such a way that cooling air flowing from the cooling air passage at least partially enters the inlet opening of the cooling air passage.
In dieser Position können die Eintrittsöffnung der Kühlluftpassage und die Austrittsöffnung des Kühlluftkanals beispielsweise miteinander fluchten. Es muss somit keine physikalisch feste Verbindung zwischen Kühlluftkanal in der Tragstruktur und Kühlluftpassage im Steinhalter existieren. Der Steinhalter ist lediglich an einer geeigneten Stelle an der Tragstruktur zu positionieren, wodurch ein einfacher Ein- oder Ausbau der Hitzeschildsteine zu Wartungszwecken ermöglicht ist. Beispielsweise können die Halteelemente in Befestigungs-Nuten geführt sein, wobei die in der Tragstruktur angeordneten Kühlluftkanäle in einem Nutboden der Befestigungs-Nut angeordnet sind. Die Steinhalter können hierbei zu Wartungszwecken über die Kühlluftkanäle hinweg geschoben werden.In this position, the inlet opening of the cooling air passage and the outlet opening of the cooling air passage can be aligned with each other, for example. There must therefore be no physically strong connection between the cooling air duct in the supporting structure and the cooling air passage in the brick holder. The stone holder is only to be positioned at a suitable location on the support structure, whereby a simple installation or removal of the heat shield stones for maintenance purposes is possible. For example, the retaining elements may be guided in fastening grooves, wherein the cooling air channels arranged in the support structure are arranged in a groove bottom of the fastening groove. The stone holder can hereby Maintenance purposes are pushed over the cooling air channels away.
Die Kühlluftpassage kann beispielsweise in dem dem Halteabschnitt abgewandten Endbereich des Befestigungsabschnitts angeordnet sein.The cooling air passage can be arranged, for example, in the end region of the fastening section facing away from the holding section.
Die Strömungsrichtung der Kühlluft beim Verlassen einer Austrittsöffnung der Kühlluftpassage kann durch entsprechende Ausbildung der Kühlluftpassage auf einen zu kühlenden Bereich der Tragstruktur gerichtet werden. Die Richtung des Gesamtimpulses eines aus einer Austrittsöffnung der Kühlluftpassage austretenden Kühlluftstroms ist hierbei nicht auf das Hitzeschild gerichtet. Insofern weist die jeweilige Ausströmrichtung eine Geschwindigkeitskomponente auf, welche parallel zur Kaltseite des Hitzeschildsteines verläuft und eine Prallkühlung des Hitzeschildsteines vermeidet.The flow direction of the cooling air when leaving an outlet opening of the cooling air passage can be directed by appropriate design of the cooling air passage on a region to be cooled of the support structure. The direction of the total momentum of a cooling air flow leaving an exit opening of the cooling air passage is not directed to the heat shield. In this respect, the respective outflow direction has a velocity component which runs parallel to the cold side of the heat shield brick and avoids impact cooling of the heat shield brick.
Gemäß einer vorteilhaften Ausgestaltung korrespondiert die Kühlluftpassage mit einer auf der Oberseite des Befestigungsabschnitts ausgebildeten Erhebung.According to an advantageous embodiment, the cooling air passage corresponds to a survey formed on the top of the mounting portion survey.
Diese Ausgestaltung der Erfindung ermöglicht es, die mindestens eine Auslassöffnung der Kühlluftpassage seitlich in der Erhebung anzuordnen.This embodiment of the invention makes it possible to arrange the at least one outlet opening of the cooling air passage laterally in the survey.
Es kann auch als vorteilhaft angesehen werden, dass der Befestigungsabschnitt im Bereich der Erhebung verdickt ist.It can also be considered advantageous that the attachment portion is thickened in the region of the survey.
Da auf diese Weise mehr Material zur Verfügung steht, kann die Kühlluftpassage beispielsweise innerhalb des Befestigungsabschnitts angeordnet werden. Beispielsweise in Form einer im Befestigungsabschnitt angeordneten Kühlluftbohrung, welche mindestens eine in einer Seitenfläche der Erhebung angeordnete Ausgangsöffnung umfasst. Die Kühlluftbohrung kann beispielsweise einen T-förmigen Verlauf aufweisen.Since more material is available in this way, the cooling air passage can be arranged, for example, within the attachment section. For example, in the form of a cooling air hole arranged in the fastening section, which comprises at least one outlet opening arranged in a side surface of the elevation. The cooling air bore may, for example, have a T-shaped profile.
Gemäß einer Ausgestaltung der Erfindung verläuft der Befestigungsabschnitt im Bereich der Erhebung stufenförmig versetzt. Entsprechend dieser Ausgestaltung kann die Kühlluftpassage als unterhalb der Stufe angeordnete Nut ausgebildet sein. Die Nut kann zwei gegenüberliegende Seitenflächen aufweisen. Die Nut könnte aber auch nur eine Seitenfläche umfassen. Die Kühlluftpassage umfasst somit zwei Auslassöffnungen, welche in einer Seitenfläche des Befestigungsabschnitts angeordnet sind. Die Kühlluftpassage kann weitere in der Erhebung angeordnete Auslassöffnungen umfassen.According to one embodiment of the invention, the attachment portion is stepped in the region of the survey. According to this embodiment, the cooling air passage may be formed as arranged below the step groove. The groove may have two opposite side surfaces. The groove could also include only one side surface. The cooling air passage thus comprises two outlet openings, which are arranged in a side surface of the fastening portion. The cooling air passage may include further outlet openings arranged in the elevation.
Vorteilhafterweise ist die Erhebung stufenförmig ausgebildet und umfasst mindestens eine in Richtung Halteabschnitt weisende Seitenfläche. Gemäß dieser Weiterbildung der Erfindung ist mindestens eine Ausgangsöffnung der Kühlluftpassage in dieser Seitenfläche angeordnet.Advantageously, the elevation is step-shaped and comprises at least one side surface pointing in the direction of the holding section. According to this embodiment of the invention, at least one outlet opening of the cooling air passage is arranged in this side surface.
Auf diese Weise können Bereiche der Tragstruktur besonders effektiv gekühlt werden, an denen der Befestigungsabschnitt gehalten ist. Hierzu kann durch entsprechende Ausgestaltung der Kühlluftpassage die Strömungsrichtung der aus der Kühlluftpassage austretenden Kühlluft auf die Seitenränder des Befestigungsabschnitts gerichtet sein.In this way, areas of the support structure can be cooled particularly effectively, in which the attachment portion is held. For this purpose, by appropriate design of the cooling air passage, the flow direction of the cooling air emerging from the cooling air passage can be directed to the side edges of the fastening section.
Weiter kann vorteilhaft vorgesehen sein, dass der Befestigungsabschnitt eine längliche Grundplatte umfasst, an deren einen Stirnseite sich der Halteabschnitt anschließt und an deren anderer Stirnseite zur Grundplatte in Richtung Hitzeschildstein versetzt eine Blockadeplatte angeordnet ist. Somit ist mittels der Blockadeplatte eine stufenförmige Erhebung in der Oberseite des Befestigungsabschnitts ausgebildet. In diesem Fall ist die Kühlluftpassage mindestens von der Unterseite der Blockadeplatte und dem unterhalb der Blockadeplatte verlaufenden Anteil der Stirnseite der Grundplatte begrenzt.Furthermore, it can be advantageously provided that the fastening section comprises an elongate base plate, at one end face of which the holding section adjoins and at the other end face of which the base plate is offset in the direction of heat shield block a blocking plate is arranged. Thus, a step-shaped elevation is formed in the top of the mounting portion by means of the blocking plate. In this case, the cooling air passage is bounded at least by the underside of the blockade plate and the portion of the end face of the base plate running below the blocking plate.
Diese Ausgestaltung der Erfindung weist einen besonders einfachen Aufbau auf. Das erfindungsgemäße Halteelement könnte beispielsweise durch Befestigen einer Blockadeplatte auf der Oberfläche eines herkömmlichen Befestigungsabschnitts realisiert werden.This embodiment of the invention has a particularly simple structure. The holding element according to the invention, for example, by attaching a blockade plate on the Surface of a conventional mounting portion can be realized.
Eine weitere Aufgabe der Erfindung ist es, ein eingangs genanntes Hitzeschild anzugeben, mit welchem eine Verzunderung der Tragstruktur aufgrund von Heißgaseinzug besonders effektiv vermieden werden kann.Another object of the invention is to provide an aforementioned heat shield, with which a scaling of the support structure can be particularly effectively avoided due to hot gas intake.
Hierzu ist mindestens ein von dem Hitzeschild umfasstes Halteelement gemäß einem der Ansprüche 1 bis 7 ausgebildet. Mindestens ein in der Tragstruktur angeordneter Kühlluftkanal korrespondiert mit dem Halteelement, so dass bei an der Tragstruktur befestigten Hitzeschildsteinen aus dem Kühlluftkanal strömende Kühlluft zumindest teilweise in die Eintrittsöffnung der Kühlluftpassage eintritt.For this purpose, at least one holding element encompassed by the heat shield is designed according to one of
Dass ein in der Tragstruktur angeordneter Kühlluftkanal mit dem Halteelement korrespondiert ist derart zu verstehen, dass das Halteelement mit seinem Befestigungsabschnitt derart an der Tragstruktur positionierbar ist, dass die aus dem Kühlluftkanal ausströmende Kühlluft zumindest teilweise in die Eintrittsöffnung der Kühlluftpassage eintritt.That a cooling air channel arranged in the support structure corresponds to the retaining element is to be understood such that the retaining element with its fastening section can be positioned on the support structure such that the cooling air flowing out of the cooling air channel at least partially enters the inlet opening of the cooling air passage.
Es ist auch eine Aufgabe der Erfindung, eine eingangs genannte Brennkammer und eine eingangs genannte Gasturbine mit mindestens einer Brennkammer anzugeben, mit welcher eine Verzunderung der Tragstruktur aufgrund von Heißgaseinzug besonders effektiv vermieden werden kann.It is also an object of the invention to provide an initially mentioned combustion chamber and an initially mentioned gas turbine with at least one combustion chamber, with which a scaling of the support structure due to hot gas intake can be particularly effectively avoided.
Hierzu ist das Hitzeschild gemäß Anspruch 8 ausgebildet bzw. mindestens eine Brennkammer gemäß Anspruch 9 ausgebildet.For this purpose, the heat shield according to claim 8 is formed or formed at least one combustion chamber according to
Es ist auch eine Aufgabe der Erfindung, ein Verfahren zum Kühlen der Tragstruktur eines Hitzeschildes anzugeben, mit welchem eine Verzunderung der Tragstruktur aufgrund von Heißgaseinzug besonders effektiv vermieden werden kann.It is also an object of the invention to provide a method for cooling the support structure of a heat shield, with which a scaling of the support structure due to hot gas intake can be particularly effectively avoided.
Das bei dem Verfahren verwendete Hitzeschild umfasst eine Anzahl von an der Tragstruktur lösbar befestigbaren Hitzeschildsteinen. Die Hitzeschildsteine sind mittels Halteelementen an der Tragstruktur befestigt.The heat shield used in the method comprises a number of heat shield bricks releasably attachable to the support structure. The heat shield bricks are fastened by means of retaining elements on the support structure.
Zur Lösung der Aufgabe wird Kühlluft von der Tragstruktur aus entlang einer durch den Befestigungsabschnitt eines Halteelementes ausgebildeten Kühlluftpassage zu mindestens einer Oberseite und/oder Seitenfläche des Befestigungsabschnitts geleitet. Der Kühlluft wird hierbei mittels der Kühlluftpassage eine Strömungsrichtung aufgeprägt, welche eine Prallkühlung des Hitzeschildsteines vermeidet.To achieve the object, cooling air is conducted from the supporting structure along at least one upper side and / or side surface of the fastening section along a cooling air passage formed by the fastening section of a retaining element. The cooling air is hereby impressed by means of the cooling air passage a flow direction, which avoids an impact cooling of the heat shield brick.
Dass der Kühlluft eine Strömungsrichtung aufgeprägt wird, ist derart zu verstehen, dass die Kühlluft aus einer oder mehreren Austrittsöffnungen der Kühlluftpassage austritt. Jeder dieser Kühlluftströme weist beim Austritt einen gegebenenfalls in unterschiedliche Richtungen weisenden Gesamtimpuls auf. Diesen ist allerdings gemeinsam, dass eine Prallkühlung des Hitzeschildes vermieden ist. Ein derartiger Gesamtimpuls weist somit immer eine Geschwindigkeitskomponente parallel zur Kaltseite des Hitzeschildsteines auf und ist nicht direkt auf dieses gerichtet.That the cooling air is impressed on a flow direction is to be understood such that the cooling air exits from one or more outlet openings of the cooling air passage. Each of these cooling air flows at the exit on an optionally pointing in different directions total pulse. However, this is common that an impingement cooling of the heat shield is avoided. Such a total pulse thus always has a velocity component parallel to the cold side of the heat shield brick and is not directed directly to this.
Vorteilhafterweise ist die Kühlluft bei Austritt aus der Kühlluftpassage auf mindestens einen Bereich der Tragstruktur gerichtet, an welchem ein Befestigungsabschnitt eines Halteelementes befestigt ist.Advantageously, the cooling air is directed at exit from the cooling air passage to at least a portion of the support structure to which a mounting portion of a holding element is attached.
Insbesondere kann vorgesehen sein, dass die entlang der Kühlluftpassage strömende Kühlluft auf einen Nutrand einer Befestigungs-Nut gerichtet ist.In particular, it can be provided that the cooling air flowing along the cooling air passage is directed to a groove edge of a fastening groove.
Hierzu ist der Verlauf der Kühlluftpassage entsprechend ausgebildet.For this purpose, the course of the cooling air passage is designed accordingly.
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 of the description of exemplary embodiments of the invention with reference to the figure of the drawing, wherein like reference numerals refer to like acting components.
Dabei zeigt die
- Fig. 1
- eine schematische Darstellung einer Gasturbine nach dem Stand der Technik,
- Fig.2
- eine schematische Darstellung eines erfindungsgemäßen Halteelementes gemäß einem ersten Ausführungsbeispiel in einer perspektivischen Ansicht,
- Fig.3
- das in
Fig.2 gezeigte Halteelement angeordnet an einer Tragstruktur eines erfindungsgemäßen Hitzeschildes in einer Schnittansicht, - Fig.4
- eine schematische Darstellung eines erfindungsgemäßen Halteelementes gemäß einem zweiten Ausführungsbeispiel in einer perspektivischen Ansicht und
- Fig.5
- das in
Fig.4 gezeigte Halteelement angeordnet an einer Tragstruktur eines erfindungsgemäßen Hitzeschildes in einer Schnittansicht.
- Fig. 1
- a schematic representation of a gas turbine according to the prior art,
- Fig.2
- a schematic representation of a holding element according to the invention according to a first embodiment in a perspective view,
- Figure 3
- this in
Fig.2 shown retaining element arranged on a support structure of a heat shield according to the invention in a sectional view, - Figure 4
- a schematic representation of a holding element according to the invention according to a second embodiment in a perspective view and
- Figure 5
- this in
Figure 4 shown holding element arranged on a supporting structure of a heat shield according to the invention in a sectional view.
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 compressor 8 through the intake housing 6. The compressed air provided at the turbine-side end of the compressor 8 is led to the
Die
Ein Kühlluftstrom, welcher durch die Eintrittsöffnung 35 in die Kühlluftpassage 34 eintritt, wird durch den Verlauf der T-förmigen Kühlluftpassage 34 in zwei Ströme aufgeteilt und tritt durch die Austrittsöffnungen 37 und 38 aus der Kühlluftpassage 34 aus. Während des Durchströmens der Kühlluftpassage 34 wird der Kühlluft eine Ausströmrichtung aufgeprägt, welche parallel zur Oberseite des Befestigungsabschnitts 23 verläuft. Eine Prallkühlung von oberhalb des Halteelementes 22 angeordneten Strukturen (nicht dargestellt) wird hierdurch vermieden.A cooling air flow, which enters the cooling
Die
In der gezeigten Schnittansicht ist die in
Die
Die
Im Rahmen der Erfindung ist eine Richtung parallel zur Kaltseite des Hitzeschildsteines gleichbedeutend mit einer Richtung parallel zur dem Hitzeschildstein zugewandten Oberfläche der Tragstruktur. Oberflächenunebenheiten der Tragstruktur bleiben hierbei unberücksichtigt.In the context of the invention, a direction parallel to the cold side of the heat shield brick is synonymous with a direction parallel to the heat shield brick facing surface of the support structure. Surface irregularities of the support structure are not taken into account.
Claims (13)
dadurch gekennzeichnet, dass die Kühlluftpassage (34, 55) mit einer auf der Oberseite (28) des Befestigungsabschnitts (23) ausgebildeten Erhebung (30) korrespondiert.Retaining element (22, 54) according to claim 1,
characterized in that the cooling air passage (34, 55) with a on the top (28) of the mounting portion (23) formed in the elevation (30) corresponds.
dadurch gekennzeichnet, dass der Befestigungsabschnitt (23) im Bereich der Erhebung (30) verdickt ist.Retaining element (22) according to claim 2,
characterized in that the attachment portion (23) in the region of the elevation (30) is thickened.
dadurch gekennzeichnet, dass der Befestigungsabschnitt (23) im Bereich der Erhebung (30) stufenförmig versetzt verläuft.Retaining element (54) according to claim 3 or 2,
characterized in that the fastening portion (23) extends steppedly offset in the region of the elevation (30).
dadurch gekennzeichnet, dass die Kühlluftpassage (34) eine im Befestigungsabschnitt (23) angeordnete Kühlluftbohrung ist, welche mindestens eine in einer Seitenfläche (32, 39) der Erhebung (30) angeordnete Austrittsöffnung (38, 37) umfasst.Retaining element (22) according to claim 3 or 4,
characterized in that the cooling air passage (34) is a cooling air bore arranged in the attachment section (23), which comprises at least one outlet opening (38, 37) arranged in a side face (32, 39) of the elevation (30).
dadurch gekennzeichnet, dass die Erhebung (30) stufenförmig ausgebildet ist mit mindestens einer in Richtung Halteabschnitt (24) weisenden Seitenfläche (32), wobei mindestens eine Austrittsöffnung (38) in dieser Seitenfläche (32) angeordnet ist.Retaining element (22, 54) according to claim 5,
characterized in that the elevation (30) is step-shaped with at least one in the direction of holding portion (24) facing side surface (32), wherein at least one outlet opening (38) in this side surface (32) is arranged.
dadurch gekennzeichnet, dass der Befestigungsabschnitt (23) eine längliche Grundplatte (57) umfasst, an deren einen Stirnseite sich der Halteabschnitt (24) anschließt und an deren anderer Stirnseite (58) zur Grundplatte (57) in Richtung Hitzeschildstein versetzt eine Blockadeplatte (60) angeordnet ist, so dass in der Oberseite (28) des Befestigungsabschnitts (23) eine stufenförmige Erhebung (30) mittels der Blockadeplatte (60) ausgebildet ist, wobei die Kühlluftpassage (55) mindestens von der Unterseite der Blockadeplatte und dem unterhalb der Blockadeplatte verlaufenden Anteil der Stirnseite (58) der Grundplatte (57) begrenzt ist.Retaining element (54) according to claim 4,
characterized in that the fastening portion (23) comprises an elongate base plate (57), at one end side of which the holding portion (24) adjoins and at the other end face (58) to the base plate (57) in the direction of the heat shield block a blockade plate (60) is arranged so that in the upper side (28) of the fastening portion (23) is a stepped elevation (30) by means of the blocking plate (60) is formed, wherein the cooling air passage (55) at least from the underside of the blockade plate and extending below the blocking plate portion the end face (58) of the base plate (57) is limited.
dadurch gekennzeichnet, dass mindestens ein Halteelement (22, 54) gemäß einem der Ansprüche 1 bis 7 ausgebildet ist und mindestens ein in der Tragstruktur (43) angeordneter Kühlluftkanal (45) mit dem Halteelement (22, 54) derart korrespondiert, dass bei an der Tragstruktur (43) befestigten Hitzeschildsteinen aus dem Kühlluftkanal (45) strömende Kühlluft zumindest teilweise in die Eintrittsöffnung (35, 68) der Kühlluftpassage (34, 55) eintritt.Heat shield (42, 64) for a combustion chamber (10) of a gas turbine (1), with a support structure (43) and a number of Heat shield bricks, which are releasably secured to the support structure (43) by means of retaining elements (22, 54), each heat shield brick having a cold side facing the support structure (43) and a hot side opposite the cold side, which can be charged with a hot medium, and each retaining element (22 54) has a holding section (24) for attachment to a heat shield block and a fastening section (23) which can be fastened to the tag structure (43), at least one cooling air channel (45) being provided in the support structure (43) for protection from hot gases,
characterized in that at least one holding element (22, 54) according to one of claims 1 to 7 is formed and at least one in the support structure (43) arranged cooling air duct (45) with the holding element (22, 54) such that at at the Supporting structure (43) mounted heat shields from the cooling air duct (45) flowing cooling air at least partially into the inlet opening (35, 68) of the cooling air passage (34, 55) occurs.
dadurch gekennzeichnet, dass das Hitzeschild (42, 64) gemäß Anspruch 8 ausgebildet ist.Combustion chamber, which is lined with a heat shield,
characterized in that the heat shield (42, 64) is formed according to claim 8.
dadurch gekennzeichnet, dass Kühlluft von der Tragstruktur (43) aus entlang einer durch den Befestigungsabschnitt (23) eines Halteelementes (22, 54) ausgebildeten Kühlluftpassage (34, 55) zu mindestens einer Oberseite (28) und/oder Seitenfläche (38, 39) des Befestigungsabschnitts (23) geleitet wird und der Kühlluft hierbei mittels der Kühlluftpassage (34, 55) eine Strömungsrichtung aufgeprägt wird, welche eine Prallkühlung des Hitzeschildsteines vermeidet.A method of cooling the support structure (43) of a heat shield (42, 64) comprising a number of heat shield bricks releasably attachable to the support structure, the heat shield bricks being secured to the support structure (43) by support members (22, 54),
characterized in that cooling air from the support structure (43) along a through the mounting portion (23) of a holding element (22, 54) formed cooling air passage (34, 55) to at least one upper side (28) and / or side surface (38, 39) of the mounting portion (23) is passed and the cooling air is here by means of the cooling air passage (34, 55) imprinted a flow direction, which is an impingement cooling of the heat shield stone avoids.
dadurch gekennzeichnet, dass die Kühlluft bei Austritt aus der Kühlluftpassage (34, 55) auf mindestens einen Bereich der Tragstruktur (43) gerichtet ist, an welchem ein Befestigungsabschnitt (23) eines Halteelementes (22, 54) befestigt ist.Method according to claim 11,
characterized in that the cooling air is directed at exit from the cooling air passage (34, 55) on at least a portion of the support structure (43) to which a mounting portion (23) of a holding element (22, 54) is attached.
dadurch gekennzeichnet, dass die entlang der Kühlluftpassage (34, 55) strömende Kühlluft auf einen Nutrand einer Befestigungs-Nut gerichtet ist.Method according to claim 12,
characterized in that the cooling air flowing along the cooling air passage (34, 55) is directed to a groove edge of a fixing groove.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12185430.1A EP2711633A1 (en) | 2012-09-21 | 2012-09-21 | Holder element for holding a heat shield and method for cooling the support structure of a heat shield |
CN201380048880.3A CN104769362B (en) | 2012-09-21 | 2013-09-17 | For keeping the holding element of heat screen block and for the method cooling down the supporting structure of heat screen |
RU2015114793A RU2634992C2 (en) | 2012-09-21 | 2013-09-17 | Retaining element for retaining brick of heat shield and method of cooling bearing structure of heat shield |
KR1020157006869A KR20150058230A (en) | 2012-09-21 | 2013-09-17 | Retaining element for retaining a heat shield block and method for cooling the supporting structure of a heat shield |
US14/430,156 US9657948B2 (en) | 2012-09-21 | 2013-09-17 | Retaining element for retaining a heat shield tile and method for cooling the supporting structure of a heat shield |
PCT/EP2013/069271 WO2014044673A2 (en) | 2012-09-21 | 2013-09-17 | Retaining element for retaining a heat shield block and method for cooling the supporting structure of a heat shield |
EP13762847.5A EP2898269B1 (en) | 2012-09-21 | 2013-09-17 | Retaining element for retaining a heat shield block and method for cooling the supporting structure of a heat shield |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12185430.1A EP2711633A1 (en) | 2012-09-21 | 2012-09-21 | Holder element for holding a heat shield and method for cooling the support structure of a heat shield |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2711633A1 true EP2711633A1 (en) | 2014-03-26 |
Family
ID=46963539
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12185430.1A Withdrawn EP2711633A1 (en) | 2012-09-21 | 2012-09-21 | Holder element for holding a heat shield and method for cooling the support structure of a heat shield |
EP13762847.5A Not-in-force EP2898269B1 (en) | 2012-09-21 | 2013-09-17 | Retaining element for retaining a heat shield block and method for cooling the supporting structure of a heat shield |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13762847.5A Not-in-force EP2898269B1 (en) | 2012-09-21 | 2013-09-17 | Retaining element for retaining a heat shield block and method for cooling the supporting structure of a heat shield |
Country Status (6)
Country | Link |
---|---|
US (1) | US9657948B2 (en) |
EP (2) | EP2711633A1 (en) |
KR (1) | KR20150058230A (en) |
CN (1) | CN104769362B (en) |
RU (1) | RU2634992C2 (en) |
WO (1) | WO2014044673A2 (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 (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015023576A1 (en) * | 2013-08-15 | 2015-02-19 | United Technologies Corporation | Protective panel and frame therefor |
DE102014206018A1 (en) * | 2014-03-31 | 2015-10-01 | Siemens Aktiengesellschaft | Gas turbine plant |
CN109724110B (en) * | 2018-12-07 | 2020-06-30 | 西安航天动力研究所 | Booster installation supporting structure with assembly compensation function |
DE102019200593A1 (en) * | 2019-01-17 | 2020-07-23 | Siemens Aktiengesellschaft | Combustion chamber |
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2012
- 2012-09-21 EP EP12185430.1A patent/EP2711633A1/en not_active Withdrawn
-
2013
- 2013-09-17 RU RU2015114793A patent/RU2634992C2/en not_active IP Right Cessation
- 2013-09-17 KR KR1020157006869A patent/KR20150058230A/en not_active Application Discontinuation
- 2013-09-17 EP EP13762847.5A patent/EP2898269B1/en not_active Not-in-force
- 2013-09-17 CN CN201380048880.3A patent/CN104769362B/en not_active Expired - Fee Related
- 2013-09-17 WO PCT/EP2013/069271 patent/WO2014044673A2/en active Application Filing
- 2013-09-17 US US14/430,156 patent/US9657948B2/en not_active Expired - Fee Related
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US20040074188A1 (en) * | 2002-10-18 | 2004-04-22 | Beck David Herbert | Clapboard siding installation clip and method of installing clapboard siding |
EP1489245A1 (en) * | 2003-06-19 | 2004-12-22 | Megadar S.r.l. | Sheet metal covering system for roofs and the like |
US20060255549A1 (en) * | 2003-10-02 | 2006-11-16 | Amos Peter G | High temperature seal and methods of use |
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Also Published As
Publication number | Publication date |
---|---|
EP2898269B1 (en) | 2016-11-30 |
US9657948B2 (en) | 2017-05-23 |
KR20150058230A (en) | 2015-05-28 |
RU2015114793A (en) | 2016-11-10 |
CN104769362A (en) | 2015-07-08 |
CN104769362B (en) | 2016-10-26 |
RU2634992C2 (en) | 2017-11-08 |
WO2014044673A3 (en) | 2014-05-22 |
WO2014044673A2 (en) | 2014-03-27 |
EP2898269A2 (en) | 2015-07-29 |
US20150247640A1 (en) | 2015-09-03 |
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