WO2010142510A1 - Heat shield element arrangement comprising screw threading means and method for installing a heat shield element - Google Patents

Heat shield element arrangement comprising screw threading means and method for installing a heat shield element Download PDF

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Publication number
WO2010142510A1
WO2010142510A1 PCT/EP2010/056649 EP2010056649W WO2010142510A1 WO 2010142510 A1 WO2010142510 A1 WO 2010142510A1 EP 2010056649 W EP2010056649 W EP 2010056649W WO 2010142510 A1 WO2010142510 A1 WO 2010142510A1
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WO
WIPO (PCT)
Prior art keywords
heat shield
shield element
support structure
element arrangement
screw
Prior art date
Application number
PCT/EP2010/056649
Other languages
German (de)
French (fr)
Inventor
Andreas Böttcher
Andre Kluge
Marco Link
Wilhelm Scheidtmann
Gerhard Simon
Thomas-Dieter Tenrahm
Marc Tertilt
Sabine Tüschen
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to RU2011153264/06A priority Critical patent/RU2516713C2/en
Priority to EP10721767.1A priority patent/EP2440851B1/en
Priority to ES10721767.1T priority patent/ES2527174T3/en
Priority to CN201080025610.7A priority patent/CN102460022B/en
Publication of WO2010142510A1 publication Critical patent/WO2010142510A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/007—Continuous combustion chambers using liquid or gaseous fuel constructed mainly of ceramic components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/04—Supports for linings

Definitions

  • the invention relates to a heat shield element arrangement comprising a heat shield element, a screw threading means, a method for mounting the heat shield element in a heat shield element arrangement and a use of the heat shield element arrangement with the features mentioned in the preambles of each independent claims.
  • Heat shields of turbine engines such as gas turbines and turbine engines, as used in power-generating power plants and in larger aircraft, have correspondingly large shielded by heat shields surfaces in the interior of the combustion chambers. Because of the thermal expansion and large dimensions, the shield must be composed of a plurality of individual ceramic heat shield elements spaced apart from one another with sufficient clearance. This gap offers the heat shield elements sufficient space for thermal expansion. However, since the gap also allows direct contact of the hot combustion gases with the support structure carrying the heat shield, a cooling fluid in the form of cooling air is blown through cooling passages as an effective countermeasure through the gaps in the direction of the combustion chamber. This cooling air is also used to specifically blow on the metallic brackets and thus to cool, with which the ceramic heat shield elements (CHS, Ceramic Heat Shields) are clamped to the support structure.
  • CHS Ceramic Heat Shields
  • brackets As simple and as one piece, a construction is known in which these brackets on the one hand in the circulating in the support structure and parallel IeI trained mounting grooves are engaged insertable, and on the other hand clamped with formed gripping portions in the formed in lateral edges of the ceramic heat shield elements Halteruten.
  • the heat shield elements are successively inserted with the holders in the grooves of the support structure, wherein the trailing elements obstruct the previously positioned in their positions.
  • a circular series of heat shield elements can be formed in a combustion chamber of a gas turbine.
  • the last remaining heat shield element can no longer be mounted in this way because the mutually present adjacent heat shield elements block a tangentially directed assembly movement.
  • a last heat shield element is referred to as a dummy plate or dummy. Consequently, solutions are used with screws for attaching the last heat shield element, which allow mounting of the heat shield element in the direction of the surface normal of the support structure.
  • a known screw connection uses four screws which engage in recesses formed in lateral edges of the heat shield element (see FIGS. 1 and 2).
  • This solution is disadvantaged in that the assembly requires a handling problem.
  • the handling of the four screws enforces, for example, the use of fixatives such as adhesive or tape, which are not reliable, so that the screws can be lost and must be found before commissioning due to high risk of damage to a turbine.
  • the overhead mounting is difficult because the screws can tilt by the fixation with tape and thus can not be inserted into the holes provided. Since this is the last heat shield, the screws can not be positioned by hand, but must be threaded into the holes using an Allen key - without sight. In particular, it is difficult to thread the fastening screws into the corresponding threaded bores of the support structure.
  • EP 1 701 095 A1 and EP 0 558 540 B1 describe, by way of example, a heat shield as described above with the described advantages and problems.
  • the heat shield elements are referred to in the art as stones and retaining elements holding them stone holder and recessed in the side edges of the heat shield elements grooves as pockets.
  • the object of the present invention is to make the mounting of a heat shield element, in particular a cap stone or a dummy, safe and uncomplicated in the direction of the surface normal of the support structure of a heat shield constructed from a large number of heat shield elements.
  • the invention according to a first aspect of a heat shield element assembly with a
  • Heat shield element in particular with a dummy, for a plurality of adjacent to a support structure arranged heat shield elements having heat shield.
  • the heat shield element in particular the dummy, is fastened to the support structure by means of at least one fastening screw in a screwing means provided in the support structure, for example in the form of at least one threaded nut.
  • the fastening means provided in the support structure is equipped with a funnel-shaped ffereneinfädelkar, in which the respective fastening screw can be inserted and pushed.
  • the screwing means has at least one resilient element, in particular a disc spring packet which, in order to compensate for the thermal expansion of the impact zeschildiatas serves.
  • the funnel-shaped ffereneinfädelstoff is fixed to a disk spring packet non-positively.
  • the funnel-shaped ffereneinfädelstoff is positively secured in a recess of the support structure.
  • the support structure may have at least one stone holder groove and in particular two stone holder grooves per row of heat shield element elements.
  • a particularly advantageous embodiment is obtained when the recess in the support structure with the Steinhalternut is identical. In this case, no special recess must be provided so that manufacturing costs can be saved.
  • the non-positive connection of the funnel-shaped ffereneinfädelffens is carried out by welding or press fit or integral with the screw or the support structure.
  • the welding is furthermore preferably carried out by spot welding, seam welding, electrical, by gas flame or friction / ultrasound.
  • the object of the invention is achieved by a ffereneinfädelkar for the heat shield element arrangement according to a preferred embodiment described above.
  • the ffereneinfädelkar is preferably formed by at least one inclined to the longitudinal axis of the fastening screw sliding surface, wherein the sliding surface is tapered to the diameter of the screwing means.
  • the object according to the invention is furthermore achieved by a method for mounting a heat shield element arrangement according to an embodiment described above. This is preferably achieved in that
  • the heat shield element which may in particular be a dummy, is brought in a position perpendicular to the support structure to its mounting position between adjacent heat shield elements on the support structure, and
  • the fastening screws are previously attached to the heat shield element.
  • the object according to the invention is also achieved by a use of the heat shield element arrangement according to a previously described preferred embodiment for forming a heat shield, in particular a capstone or a dummy of the heat shield, an internal combustion engine, in particular a turbine.
  • FIG. 1 shows a partial cross-sectional view through a known heat shield element assembly
  • Figure 2 is a partial perspective view of the known heat shield element of Fig.l.
  • FIG. 3 is a cross-sectional view of a Hitzeschildelernentan inch invention.
  • FIGS. 1 and 2 show a partial cross-sectional view through a known heat shield element arrangement 1.
  • the heat shield elements 3 or so-called bricks are fastened to the support structure 30 by means of a total of four screw connections.
  • they are keystones or dummies of a heat element shield.
  • lateral recesses or pockets 5 are formed with lateral recesses 6, in which the screw shaft 15 and screw head 13 are inserted laterally.
  • a pressure distributor or disc 14 is arranged, which distributes the pressure over a larger area and thus protects the ceramic body of the heat shield element 3.
  • a heat shield element 3 with all four attached screws 15 and pressure distributors 14 must now be mounted vertically on the support structure 30 according to the prior art, and the four screw shafts 15 must be threaded into the four correspondingly arranged in the support structure 30 screw holes. Because the screws inserted laterally in the pockets 5 can easily fall out, they are previously fixed in their positions with an adhesive or adhesive tape. When threading, however, this adhesive connection is easily lost and the screws can either fall out or be tilted and therefore no longer meet in the screw holes of the support structure 30th
  • the cooling is carried out, for example, as a ventilation via channels and ventilation lines 25.
  • the mounting groove or Steinhalternut 40 of the support structure 30 or special channels formed in the support structure serve.
  • the screw 15 is also screwed into a spring plate package 19 to allow thermal movement of the heat shield element.
  • the spring plate package 19 is installed in a package sleeve 20 which is closed by a fixing plate 22.
  • This fixing disc 22 prevents the disc spring and the threaded nut 21 from falling out when the screw 15 has not yet been inserted.
  • the threaded nut 21 is also secured in the package sleeve 20 against rotation, so that the fastening screw 15 can be screwed into it.
  • the threading of the fastening screws 15 represents a handling problem when in particular four fastening screws 15 have to be threaded.
  • FIG. 3 shows a partial cross-sectional view of a heat shield element arrangement 1 according to the invention.
  • the heat shield element 3 is located immediately before being vertically lowered with its fastening screw 15 and pressure distributor 14 inserted laterally into the pocket 5 into its position on the support structure 30.
  • a funnel-shaped screw threading means 33 is arranged on the disc spring assembly 19 serving as a screwing means 19.
  • the ffereneinfädelstoff 33 has a preferably circumferentially formed inclined sliding surface 35 which corresponds to the diameter of the screw Bungsstoffs 19, here the puncture in the plate spring package 19, rejuvenated.
  • the ffereneinfädelkar 33 is preferably formed here as a metallic funnel and inserted into a formed in the package sleeve 20 of the plate spring package 19 snug fit.
  • the fixation of the screw threading means 33 in the interference fit may be carried out in a known manner of fastening, such as spot welding, seam welding, friction welding, ultrasonic welding, interference fit, etc.
  • the screw threading means 33 may also be made integral with the package sleeve 20.
  • the screw threading means 33 can also be formed in the support structure 30.
  • the ffereneinfädelkar 33 is preferably arranged in the Steinhalternut 40 or another in the support structure 30 specially formed recess having a sufficient height h.
  • the screw threading means 33 according to the invention does not project from the support structure 30 and consequently does not interfere with the heat shield element arrangement 1.
  • the end of the fastening screw 15 is detected during assembly by the wider diameter of the funnel-shaped sterenein- threading means 33 and slides on the sliding surface 35 in the through hole of the screwing, d. H. in this case, the plate spring package 19th
  • the Steinhalternut 40 can, as described under Figure 1, continue to be used for introducing the cooling air, wherein the cooling air can flow around the ffereneinfädelstoff 33 due to the spacing to the walls of Steinhalternut 40 sufficiently well.
  • a ventilation duct 25 can also be used for this purpose.

Abstract

Heat shield element arrangement (1), comprising a heat shield element (3) for a heat shield having a plurality of heat shield elements arranged adjacently on a support structure (30), wherein the heat shield element (3) is attached to the support structure (30) by means of at least one fastening screw (15) in a screw means provided in the support structure (30) and wherein the support structure (30) per heat shield element row has at least two parallel stone holder grooves (40). It is provided that the screw means provided in the support structure (30) is equipped with a funnel-shaped screw threading means (33), into which the respective fastening screw (15) can be introduced and passed through.

Description

Beschreibungdescription
Hitzeschildelementanordnung mit Schraubeneinfädelmittel und Verfahren zur Montage eines HitzeschildelementesHeat shield element assembly with screw threading means and method of assembling a heat shield element
Die Erfindung betrifft eine Hitzeschildelementanordnung mit einem Hitzeschildelement, ein Schraubeneinfädelmittel, ein Verfahren zur Montage des Hitzeschildelementes in einer Hitzeschildelementanordnung und eine Verwendung der Hitzeschild- elementanordnung mit den in den Oberbegriffen jeweiliger unabhängiger Ansprüche genannten Merkmalen.The invention relates to a heat shield element arrangement comprising a heat shield element, a screw threading means, a method for mounting the heat shield element in a heat shield element arrangement and a use of the heat shield element arrangement with the features mentioned in the preambles of each independent claims.
In vielen technischen Anwendungen werden leistungsfähige keramische Hitzeschilde verwendet, um Temperaturen zwischen 1000 und 1600 Grad Celsius zu widerstehen. Insbesondere dieIn many technical applications, powerful ceramic heat shields are used to withstand temperatures between 1000 and 1600 degrees Celsius. especially the
Hitzeschilde von Turbinenmaschinen wie Gasturbinen und Turbinentriebwerken, wie sie in stromerzeugenden Kraftwerken und in größeren Flugzeugen Verwendung finden, weisen entsprechend große durch Hitzeschilde abzuschirmende Flächen im Inneren der Brennkammern auf. Wegen der thermischen Ausdehnung und wegen großer Abmessungen muss der Schild aus einer Vielzahl einzelner aus Keramik hergestellter Hitzeschildelemente zusammengesetzt werden, die voneinander mit einem ausreichenden Spalt beabstandet sind. Dieser Spalt bietet den Hitzeschild- elementen ausreichenden Raum für die thermische Ausdehnung. Da jedoch der Spalt auch einen direkten Kontakt der heißen Verbrennungsgase mit der den Hitzeschild tragenden Tragstruktur ermöglicht, wird als eine effektive Gegenmaßnahme durch die Spalte in Richtung der Brennkammer ein Kühlfluid in Form von Kühlluft über Kühlkanäle eingeblasen. Diese Kühlluft wird ferner dazu verwendet, gezielt die metallischen Halterungen anzublasen und somit zu kühlen, mit welchen die keramischen Hitzeschildelemente (CHS, Ceramic Heat Shields) an der Tragstruktur verklammert sind.Heat shields of turbine engines, such as gas turbines and turbine engines, as used in power-generating power plants and in larger aircraft, have correspondingly large shielded by heat shields surfaces in the interior of the combustion chambers. Because of the thermal expansion and large dimensions, the shield must be composed of a plurality of individual ceramic heat shield elements spaced apart from one another with sufficient clearance. This gap offers the heat shield elements sufficient space for thermal expansion. However, since the gap also allows direct contact of the hot combustion gases with the support structure carrying the heat shield, a cooling fluid in the form of cooling air is blown through cooling passages as an effective countermeasure through the gaps in the direction of the combustion chamber. This cooling air is also used to specifically blow on the metallic brackets and thus to cool, with which the ceramic heat shield elements (CHS, Ceramic Heat Shields) are clamped to the support structure.
Um die Halterungen möglichst einfach und einteilig auszuführen, ist eine Bauweise bekannt, bei der diese Halterungen einerseits in die in der Tragstruktur kreisumlaufend und paral- IeI ausgebildete Montage-Nuten eingreifend einschiebbar sind, und andererseits mit ausgebildeten Greifabschnitten in die in seitlichen Kanten der keramischen Hitzeschildelemente ausgebildete Halternuten verklammert werden. Die Hitzeschildele- mente werden nacheinander mit den Haltern in die Nuten der Tragstruktur eingeschoben, wobei die nachkommenden Elemente die vorher positionierten in ihren Positionen versperren. Auf diese Weise kann beispielsweise eine kreisumlaufende Reihe von Hitzeschildelementen in einer Brennkammer einer Gasturbi- ne gebildet werden.To make the brackets as simple and as one piece, a construction is known in which these brackets on the one hand in the circulating in the support structure and parallel IeI trained mounting grooves are engaged insertable, and on the other hand clamped with formed gripping portions in the formed in lateral edges of the ceramic heat shield elements Halteruten. The heat shield elements are successively inserted with the holders in the grooves of the support structure, wherein the trailing elements obstruct the previously positioned in their positions. In this way, for example, a circular series of heat shield elements can be formed in a combustion chamber of a gas turbine.
Das letzte verbleibende Hitzeschildelement kann jedoch nicht mehr auf diese Weise montiert werden, weil die beiderseits vorhandenen benachbarten Hitzeschildelemente eine tangential gerichtete Montagebewegung blockieren. Oft wird ein derartiges letzes Hitzeschildelement als ein Attrappenplatte oder Attrappe bezeichnet. Folglich werden zum Anbringen des letzten Hitzeschildelementes Lösungen mit Verschraubungen angewendet, die eine Montage des Hitzeschildelementes in Richtung der Flächennormalen der Tragstruktur ermöglichen.However, the last remaining heat shield element can no longer be mounted in this way because the mutually present adjacent heat shield elements block a tangentially directed assembly movement. Often, such a last heat shield element is referred to as a dummy plate or dummy. Consequently, solutions are used with screws for attaching the last heat shield element, which allow mounting of the heat shield element in the direction of the surface normal of the support structure.
Eine bekannte Verschraubung benutzt hierzu vier Schrauben, die in die in seitlichen Kanten des Hitzeschildelementes hierfür ausgebildete Aussparungen eingreifen (siehe Figuren 1 und 2) . Diese Lösung ist dadurch benachteiligt, dass die Montage ein Handhabungsproblem bedingt. Die Handhabung der vier Schrauben erzwingt beispielsweise die Verwendung von Fixiermitteln wie Verklebung oder Klebeband, die nicht zuverlässig sind, wodurch die Schrauben verloren gehen können und wegen hoher Beschädigungsgefahr einer Turbine unbedingt vor Inbetriebnahme gefunden werden müssen. Ferner ist die Über-Kopf- Montage ist schwierig, da die Schrauben durch die Fixierung per Klebeband verkippen können und somit nicht in die vorgesehenen Bohrungen eingeführt werden kann. Da es sich um das letzte Hitzeschild handelt, können die Schrauben nicht per Hand positioniert werden, sondern müssen per Inbus - ohne Sicht - in die Bohrungen eingefädelt werden. Es ist insbesondere schwierig, die Befestigungsschrauben in die entsprechenden Gewindebohrungen der Tragstruktur einzufädeln .For this purpose, a known screw connection uses four screws which engage in recesses formed in lateral edges of the heat shield element (see FIGS. 1 and 2). This solution is disadvantaged in that the assembly requires a handling problem. The handling of the four screws enforces, for example, the use of fixatives such as adhesive or tape, which are not reliable, so that the screws can be lost and must be found before commissioning due to high risk of damage to a turbine. Furthermore, the overhead mounting is difficult because the screws can tilt by the fixation with tape and thus can not be inserted into the holes provided. Since this is the last heat shield, the screws can not be positioned by hand, but must be threaded into the holes using an Allen key - without sight. In particular, it is difficult to thread the fastening screws into the corresponding threaded bores of the support structure.
EP 1 701 095 Al und EP 0 558 540 Bl beschreiben beispielhaft einen wie oben genant ausgeführten Hitzeschild mit den geschilderten Vorteilen und Problemen. Die Hitzeschildelemente werden in der Fachwelt auch als Steine und die sie haltenden Halteelemente Steinhalter und die in den Seitenkanten der Hitzeschildelemente ausgesparte Nuten als Taschen bezeichnet.EP 1 701 095 A1 and EP 0 558 540 B1 describe, by way of example, a heat shield as described above with the described advantages and problems. The heat shield elements are referred to in the art as stones and retaining elements holding them stone holder and recessed in the side edges of the heat shield elements grooves as pockets.
Die vorliegende Erfindung macht es sich zur Aufgabe, die Montage eines Hitzeschildelementes, insbesondere eines Schlusssteines oder einer Attrappe, in Richtung der Flächennormalen der Tragstruktur eines aus einer Vielzahl von Hitzeschildelementen aufgebauten Hitzeschildes sicher und unkompliziert zu gestalten .The object of the present invention is to make the mounting of a heat shield element, in particular a cap stone or a dummy, safe and uncomplicated in the direction of the surface normal of the support structure of a heat shield constructed from a large number of heat shield elements.
Zur Lösung dieser Aufgabe geht die Erfindung nach einem ers- ten Aspekt von einer Hitzeschildelementanordnung mit einemTo achieve this object, the invention according to a first aspect of a heat shield element assembly with a
Hitzeschildelement, insbesondere mit einer Attrappe, für einen eine Vielzahl benachbart an einer Tragstruktur angeordneter Hitzeschildelemente aufweisenden Hitzeschild aus. Dabei ist das Hitzeschildelement, insbesondere die Attrappe, an der Tragstruktur mithilfe wenigstens einer Befestigungsschraube in einem in der Tragstruktur vorgesehenen Verschraubungsmit- tel, beispielsweise in Form wenigstens einer Gewindemutter, befestigt .Heat shield element, in particular with a dummy, for a plurality of adjacent to a support structure arranged heat shield elements having heat shield. In this case, the heat shield element, in particular the dummy, is fastened to the support structure by means of at least one fastening screw in a screwing means provided in the support structure, for example in the form of at least one threaded nut.
Erfindungsgemäß ist es vorgesehen, dass das in der Tragstruktur vorgesehene Verschraubungsmittel mit einem trichterförmigen Schraubeneinfädelmittel ausgestattet ist, in welches die jeweilige Befestigungsschraube einführbar und durchsteckbar ist .According to the invention, it is provided that the fastening means provided in the support structure is equipped with a funnel-shaped Schraubeneinfädelmittel, in which the respective fastening screw can be inserted and pushed.
Von Vorteil ist es, wenn das Verschraubungsmittel wenigstens ein federndes Element aufweist, insbesondere ein Tellerfederpaket, das zum Ausgleich der thermischen Ausdehnung des Hit- zeschildelementes dient. Vorzugsweise ist das trichterförmige Schraubeneinfädelmittel an einem Tellerfederpaket kraftschlüssig befestigt.It is advantageous if the screwing means has at least one resilient element, in particular a disc spring packet which, in order to compensate for the thermal expansion of the impact zeschildelementes serves. Preferably, the funnel-shaped Schraubeneinfädelmittel is fixed to a disk spring packet non-positively.
In einer weiteren bevorzugten Ausgestaltung der vorliegenden Erfindung ist das trichterförmige Schraubeneinfädelmittel in einer Aussparung der Tragstruktur kraftschlüssig befestigt. Die Tragstruktur kann pro Hitzeschildelementreihe wenigstens eine Steinhalternut und insbesondere zwei Steinhalternuten aufweisen. Eine besonders vorteilhafte Ausgestaltung ergibt sich, wenn die Aussparung in der Tragstruktur mit der Steinhalternut identisch ist. In diesem Fall muss keine spezielle Aussparung vorgesehen werden, sodass Herstellkosten eingespart werden.In a further preferred embodiment of the present invention, the funnel-shaped Schraubeneinfädelmittel is positively secured in a recess of the support structure. The support structure may have at least one stone holder groove and in particular two stone holder grooves per row of heat shield element elements. A particularly advantageous embodiment is obtained when the recess in the support structure with the Steinhalternut is identical. In this case, no special recess must be provided so that manufacturing costs can be saved.
Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung ist die kraftschlüssige Verbindung des trichterförmigen Schraubeneinfädelmittels per Verschweißung oder Presssitz oder einstückig mit dem Verschraubungsmittel oder der Trag- struktur ausgeführt.According to a further preferred embodiment of the invention, the non-positive connection of the funnel-shaped Schraubeneinfädelmittels is carried out by welding or press fit or integral with the screw or the support structure.
Die Verschweißung ist ferner bevorzugt per Punktverschwei- ßung, Nahtverschweißung, elektrisch, durch Gasflamme oder Reibung/Ultraschall ausgeführt.The welding is furthermore preferably carried out by spot welding, seam welding, electrical, by gas flame or friction / ultrasound.
Nach einem weiteren Aspekt ist die erfindungsgemäße Aufgabe durch ein Schraubeneinfädelmittel für die Hitzeschildelementanordnung nach einer vorhergehend beschriebenen bevorzugten Ausgestaltung gelöst.According to another aspect, the object of the invention is achieved by a Schraubeneinfädelmittel for the heat shield element arrangement according to a preferred embodiment described above.
Das Schraubeneinfädelmittel ist vorzugsweise durch wenigstens eine zur Längsachse der Befestigungsschraube geneigt angeordnete Gleitfläche gebildet, wobei die Gleitfläche sich zum Durchmesser des Verschraubungsmittels verjungt.The Schraubeneinfädelmittel is preferably formed by at least one inclined to the longitudinal axis of the fastening screw sliding surface, wherein the sliding surface is tapered to the diameter of the screwing means.
Die erfindungsgemäße Aufgabe wird ferner mit einem Verfahren zur Montage einer Hitzeschildelementanordnung nach einer vorhergehend beschriebenen Ausgestaltung gelöst. Dies wird vorzugsweise dadurch erreicht, dassThe object according to the invention is furthermore achieved by a method for mounting a heat shield element arrangement according to an embodiment described above. This is preferably achieved in that
- das Hitzeschildelement, das insbesondere eine Attrappe sein kann, in einer senkrechten zur Tragstruktur Montagebewegung an seine zwischen benachbarten Hitzeschildelementen auf der Tragstruktur vorgesehene Position gebracht wird, undthe heat shield element, which may in particular be a dummy, is brought in a position perpendicular to the support structure to its mounting position between adjacent heat shield elements on the support structure, and
- die Befestigungsschrauben in jeweiliges trichterförmiges Schraubeneinfädelmittel eingefädelt und in das in der Tragstruktur vorgesehene Verschraubungsmittel eingeschraubt wer- den.- The fastening screws are threaded into respective funnel-shaped Schraubeneinfädelmittel and screwed into the provided in the support structure bolting means are the.
Gemäß einer weiteren bevorzugten Ausgestaltung des erfindungsgemäßen Montageverfahrens werden die Befestigungsschrauben vorher an dem Hitzeschildelement angebaut.According to a further preferred embodiment of the mounting method according to the invention, the fastening screws are previously attached to the heat shield element.
Bei Verwendung einer Hitzeschildelementanordnung mit federnden Steinhaltern werden diese federnden Steinhalter mit oder ohne Befestigungsschrauben vorher an dem Hitzeschildelement angebaut bzw. befestigt.When using a heat shield element arrangement with resilient stone holders, these resilient stone holders are previously attached or attached to the heat shield element with or without fastening screws.
Die erfindungsgemäße Aufgabe wird ferner auch durch eine Verwendung der Hitzeschildelementanordnung nach einer vorhergehend beschriebenen bevorzugten Ausgestaltung zum Ausbilden eines Hitzeschildes, insbesondere eines Schlusssteines oder einer Attrappe des Hitzeschildes, einer Brennkraftmaschine, insbesondere einer Turbine, gelöst.The object according to the invention is also achieved by a use of the heat shield element arrangement according to a previously described preferred embodiment for forming a heat shield, in particular a capstone or a dummy of the heat shield, an internal combustion engine, in particular a turbine.
Die Erfindung wird nachfolgend in Ausführungsbeispielen anhand der zugehörigen Zeichnungen erläutert. Es zeigen:The invention will be explained below in embodiments with reference to the accompanying drawings. Show it:
Figur 1 eine Teilquerschnittsansicht durch eine bekannte Hitzeschildelernentanordnung,FIG. 1 shows a partial cross-sectional view through a known heat shield element assembly;
Figur 2 eine perspektivische Teilansicht auf das bekannte Hitzeschildelement aus Fig.l, undFigure 2 is a partial perspective view of the known heat shield element of Fig.l, and
Figur 3 eine Querschnittsansicht einer erfindungsgemäßen Hitzeschildelernentanordnung . Figuren 1 und 2 zeigen eine Teilquerschnittsansicht durch eine bekannte Hitzeschildelementanordnung 1.Figure 3 is a cross-sectional view of a Hitzeschildelernentanordnung invention. FIGS. 1 and 2 show a partial cross-sectional view through a known heat shield element arrangement 1.
Bei der bekannten Hitzeschildelementanordnung 1 werden die Hitzeschildelemente 3 oder sogenannte Steine mithilfe von insgesamt vier Verschraubungen an der Tragstruktur 30 befestigt. Es handelt sich insbesondere um Schlusssteine oder Attrappen eines Hitzeelementschildes.In the known heat shield element arrangement 1, the heat shield elements 3 or so-called bricks are fastened to the support structure 30 by means of a total of four screw connections. In particular, they are keystones or dummies of a heat element shield.
In den seitlichen Kanten des Hitzeschildelementes 3 sind Vertiefungen oder Taschen 5 mit seitlichen Aussparungen 6 gebildet, in welchen der Schraubenschaft 15 und Schraubenkopf 13 seitlich einlegbar sind. Unter dem Schraubenkopf 13 ist ein Druckverteiler oder Scheibe 14 angeordnet, die den Druck auf eine größere Fläche verteilt und so den keramischen Körper des Hitzeschildelementes 3 schont.In the lateral edges of the heat shield element 3 recesses or pockets 5 are formed with lateral recesses 6, in which the screw shaft 15 and screw head 13 are inserted laterally. Under the screw head 13, a pressure distributor or disc 14 is arranged, which distributes the pressure over a larger area and thus protects the ceramic body of the heat shield element 3.
Ein Hitzeschildelement 3 mit allen vier angebrachten Schrau- ben 15 und Druckverteilern 14 muss nach Stand der Technik nun senkrecht auf die Tragstruktur 30 montiert werden, und die vier Schraubenschäfte 15 müssen in die vier entsprechend in der Tragstruktur 30 angeordnete Schraubenbohrungen eingefädelt werden. Weil die seitlich in die Taschen 5 eingelegte Schrauben leicht herausfallen können, werden sie mit einem Klebstoff oder Klebestreifen vorher in ihren Positionen fixiert. Beim Einfädeln jedoch geht diese Klebeverbindung leicht verloren und die Schrauben können entweder herausfallen oder verkantet werden und treffen deshalb nicht mehr in die Schraubenbohrungen der Tragstruktur 30.A heat shield element 3 with all four attached screws 15 and pressure distributors 14 must now be mounted vertically on the support structure 30 according to the prior art, and the four screw shafts 15 must be threaded into the four correspondingly arranged in the support structure 30 screw holes. Because the screws inserted laterally in the pockets 5 can easily fall out, they are previously fixed in their positions with an adhesive or adhesive tape. When threading, however, this adhesive connection is easily lost and the screws can either fall out or be tilted and therefore no longer meet in the screw holes of the support structure 30th
Weil die Schrauben aus der Tragstruktur relativ hoch herausragen, werden sie durch zwischen den benachbarten Hitzeschildelementen 3 vorhandene Spalte von den heißen Gasen an- geströmt und erreichen hohe Temperaturen, wodurch eine Kühlung erforderlich wird. Die Kühlung ist beispielsweise als eine Belüftung über Kanäle und Belüftungsleitungen 25 ausgeführt. Als Kühlkanal kann die Montagenut oder Steinhalternut 40 der Tragstruktur 30 oder spezielle in der Tragstruktur gebildete Kanäle dienen.Because the screws protrude relatively high from the support structure, they are flown by the hot gases between the adjacent heat shield elements 3 and reach high temperatures, whereby cooling is required. The cooling is carried out, for example, as a ventilation via channels and ventilation lines 25. As a cooling channel, the mounting groove or Steinhalternut 40 of the support structure 30 or special channels formed in the support structure serve.
Weil bei dieser Montageart die thermische Ausdehnung des ke- ramischen Hitzeschildelementes 3 und der metallischen Schraube 15 erheblich und unterschiedlich ist, ist die Schraube 15 außerdem in einem Federtellerpaket 19 verschraubt, um eine thermische Bewegung des Hitzeschildelementes zu ermöglichen. Das Federtellerpaket 19 ist in einer Pakethülse 20 verbaut, die von einer Fixierscheibe 22 verschlossen ist. Diese Fixierscheibe 22 verhindert das Herausfallen der Tellerfeder und der Gewindemutter 21, wenn die Schraube 15 noch nicht eingesetzt ist. Die Gewindemutter 21 ist außerdem in der Pakethülse 20 gegen eine Verdrehung gesichert, sodass die Be- festigungsschraube 15 in sie eingeschraubt werden kann.Because in this type of mounting the thermal expansion of the ceramic heat shield element 3 and the metallic screw 15 is significant and different, the screw 15 is also screwed into a spring plate package 19 to allow thermal movement of the heat shield element. The spring plate package 19 is installed in a package sleeve 20 which is closed by a fixing plate 22. This fixing disc 22 prevents the disc spring and the threaded nut 21 from falling out when the screw 15 has not yet been inserted. The threaded nut 21 is also secured in the package sleeve 20 against rotation, so that the fastening screw 15 can be screwed into it.
Das Einfädeln der Befestigungsschrauben 15 stellt ein Handhabungsproblem dar, wenn insbesondere vier Befestigungsschrauben 15 eingefädelt werden müssen.The threading of the fastening screws 15 represents a handling problem when in particular four fastening screws 15 have to be threaded.
Diese bekannte Anordnung ist somit konstruktionsbedingt schwierig in der Handhabung bei der Montage, sodass mitunter zwei Personen erforderlich sein können.This known arrangement is thus structurally difficult to handle during assembly, so sometimes two people may be required.
Figur 3 zeigt eine Teil-Querschnittsansicht einer erfindungsgemäßen Hitzeschildelementanordnung 1.FIG. 3 shows a partial cross-sectional view of a heat shield element arrangement 1 according to the invention.
Das Hitzeschildelement 3 befindet sich unmittelbar davor, mit der seitlich in die Tasche 5 eingelegten Befestigungsschraube 15 und Druckverteiler 14 in seine Position auf der Tragstruktur 30 senkrecht abgesenkt zu werden.The heat shield element 3 is located immediately before being vertically lowered with its fastening screw 15 and pressure distributor 14 inserted laterally into the pocket 5 into its position on the support structure 30.
Erfindungsgemäß ist an dem als Verschraubungsmittel 19 dienenden Tellerfederpaket 19 ein trichterförmiges Schraubenein- fädelmittel 33 angeordnet. Das Schraubeneinfädelmittel 33 weist eine vorzugsweise umlaufend ausgebildete geneigte Gleitfläche 35 auf, die sich zum Durchmesser des Verschrau- bungsmittels 19, hier der Durchbohrung im Tellerfederpaket 19, verjungt.According to the invention, a funnel-shaped screw threading means 33 is arranged on the disc spring assembly 19 serving as a screwing means 19. The Schraubeneinfädelmittel 33 has a preferably circumferentially formed inclined sliding surface 35 which corresponds to the diameter of the screw Bungsmittels 19, here the puncture in the plate spring package 19, rejuvenated.
Das Schraubeneinfädelmittel 33 ist hierbei vorzugsweise als metallischer Trichter ausgebildet und in einen in der Pakethülse 20 des Tellerfederpakets 19 ausgebildeten Passsitz eingesetzt. Die Fixierung des Schraubeneinfädelmittels 33 in dem Passsitz kann nach einer bekannten Befestigungsart ausgeführt werden, wie Punktschweißen, Nahtschweißen, Reibungsschweißen, Ultraschallschweißen, Presssitz usw. In einer anderen Ausgestaltung kann das Schraubeneinfädelmittel 33 auch einstückig mit der Pakethülse 20 ausgeführt werden. In einer noch weiter entwickelten Ausgestaltung kann das Schraubeneinfädelmittel 33 auch in der Tragstruktur 30 ausgeformt sein.The Schraubeneinfädelmittel 33 is preferably formed here as a metallic funnel and inserted into a formed in the package sleeve 20 of the plate spring package 19 snug fit. The fixation of the screw threading means 33 in the interference fit may be carried out in a known manner of fastening, such as spot welding, seam welding, friction welding, ultrasonic welding, interference fit, etc. In another embodiment, the screw threading means 33 may also be made integral with the package sleeve 20. In a further developed embodiment, the screw threading means 33 can also be formed in the support structure 30.
Das Schraubeneinfädelmittel 33 wird vorzugsweise in der Steinhalternut 40 oder einer anderen in der Tragstruktur 30 speziell ausgebildeten Aussparung angeordnet, die eine ausreichende Höhe h aufweist. Dadurch ragt das erfindungsgemäße Schraubeneinfädelmittel 33 nicht von der Tragstruktur 30 hervor und stört folglich nicht in der Hitzeschildelementanordnung 1.The Schraubeneinfädelmittel 33 is preferably arranged in the Steinhalternut 40 or another in the support structure 30 specially formed recess having a sufficient height h. As a result, the screw threading means 33 according to the invention does not project from the support structure 30 and consequently does not interfere with the heat shield element arrangement 1.
Das Ende der Befestigungsschraube 15 wird bei der Montage von dem breiteren Durchmesser des trichterförmigen Schraubenein- fädelmittels 33 erfasst und gleitet an der Gleitfläche 35 in die Durchbohrung des Verschraubungsmittels, d. h. in diesem Fall des Tellerfederpaketes 19.The end of the fastening screw 15 is detected during assembly by the wider diameter of the funnel-shaped Schraubenein- threading means 33 and slides on the sliding surface 35 in the through hole of the screwing, d. H. in this case, the plate spring package 19th
Die Steinhalternut 40 kann, wie unter Figur 1 beschrieben, weiterhin zum Einleiten der Kühlluft verwendet werden, wobei die Kühlluft das Schraubeneinfädelmittel 33 aufgrund der Beabstandung zu den Wandungen der Steinhalternut 40 ausreichend gut umströmen kann. Eine Belüftungsleitung 25 kann hierzu ebenso verwendet werden. The Steinhalternut 40 can, as described under Figure 1, continue to be used for introducing the cooling air, wherein the cooling air can flow around the Schraubeneinfädelmittel 33 due to the spacing to the walls of Steinhalternut 40 sufficiently well. A ventilation duct 25 can also be used for this purpose.

Claims

Patentansprüche claims
1. Hitzeschildelementanordnung (1) mit einem Hitzeschildelement (3) für einen eine Vielzahl benachbart an einer Trag- struktur (30) angeordneter Hitzeschildelemente aufweisenden Hitzeschild, wobei das Hitzeschildelement (3) an der Tragstruktur (30) mithilfe wenigstens einer Befestigungsschraube (15) in einem in der Tragstruktur (30) vorgesehenen Ver- schraubungsmittel (19) befestigt ist, dadurch gekennzeichnet, dass das in der Tragstruktur (30) vorgesehene Verschraubungsmittel (19) mit einem trichterförmigen Schraubeneinfädelmittel (33) ausgestattet ist, in welches die jeweilige Befestigungsschraube (15) einführbar und durchsteckbar ist.A heat shield element arrangement (1) comprising a heat shield element (3) for a heat shield having a plurality of heat shield elements arranged adjacent to a support structure (30), the heat shield element (3) being fastened to the support structure (30) by means of at least one fastening screw (15) a fastening means (19) provided in the support structure (30), characterized in that the screwing means (19) provided in the support structure (30) is provided with a funnel-shaped screw threading means (33) into which the respective fastening screw (15 ) is insertable and pluggable.
2. Hitzeschildelementanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das trichterförmige Schraubeneinfädelmittel (33) an einem Tellerfederpaket (19, 20) kraftschlüssig befestigt ist.2. heat shield element arrangement according to claim 1, characterized in that the funnel-shaped Schraubeneinfädelmittel (33) on a disc spring assembly (19, 20) is fixed non-positively.
3. Hitzeschildelementanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das trichterförmige Schraubeneinfädelmittel (33) in einer Aussparung (40) der Tragstruktur (30) kraftschlüssig befes- tigt ist.3. heat shield element arrangement according to claim 1, characterized in that the funnel-shaped Schraubeneinfädelmittel (33) in a recess (40) of the support structure (30) is frictionally fortified.
4. Hitzeschildelementanordnung nach Anspruch 3, dadurch gekennzeichnet, dass die Tragstruktur (30) je Hitzeschildreihe wenigstens eine Hitzeschildelementhalternut (40) aufweist und die Aussparung (40) in der Tragstruktur (30) mit der Hitzeschildelementhalternut (40) identisch ist.4. heat shield element arrangement according to claim 3, characterized in that the support structure (30) per Hitzeschildreihe at least one Hitzeschildelementhalternut (40) and the recess (40) in the support structure (30) with the Hitzeschildelementhalternut (40) is identical.
5. Hitzeschildelementanordnung nach Anspruch 2, 3 oder 4, dadurch gekennzeichnet, dass die kraftschlüssige Verbindung des trichterförmigen Schraubeneinfädelmittels (33) per Verschweißung oder Presssitz oder einstückig mit dem Verschraubungsmittel (19, 20) oder der Tragstruktur (30) ausgeführt ist.5. heat shield element arrangement according to claim 2, 3 or 4, characterized in that the frictional connection of the funnel-shaped Schraubeneinfädelmittels (33) by welding or press fit or is integral with the screw means (19, 20) or the support structure (30) is executed.
6. Hitzeschildelementanordnung nach Anspruch 5, dadurch gekennzeichnet, dass die Verschweißung per Punktverschweißung, Nahtverschweißung, elektrisch, durch Gasflamme oder Reibung/Ultraschall ausgeführt ist.6. heat shield element arrangement according to claim 5, characterized in that the welding is carried out by spot welding, seam welding, electrically, by gas flame or friction / ultrasound.
7. Hitzeschildelementanordnung nach einem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das Verschraubungsmittel (19, 20) eine Gewindemutter (21) aufweist .7. heat shield element arrangement according to any preceding claim, characterized in that the screwing means (19, 20) has a threaded nut (21).
8. Hitzeschildelementanordnung nach Anspruch 7, dadurch gekennzeichnet, dass das Verschraubungsmittel (19, 20) wenigstens ein federndes Element (19) aufweist, insbesondere ein Tellerfederpaket (19), das zum Ausgleich der thermischen Ausdehnung des Hitzeschildelementes (3) dient.8. heat shield element arrangement according to claim 7, characterized in that the screw means (19, 20) comprises at least one resilient element (19), in particular a cup spring assembly (19) which serves to compensate for the thermal expansion of the heat shield element (3).
9. Schraubeneinfädelmittel (33) für die Hitzeschildelementanordnung nach einem vorhergehenden Anspruch.9. Schraubeneinfädelmittel (33) for the heat shield element arrangement according to any preceding claim.
10. Schraubeneinfädelmittel (33) nach einem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das Schraubeneinfädelmittel (33) durch wenigstens eine zur Längsachse der Befestigungsschraube (15) geneigt angeordnete Gleitfläche (35) gebildet ist, wobei die Gleitfläche (35) sich zum Durchmesser des Verschraubungsmittels (19) verjungt.10. Schraubeneinfädelmittel (33) according to any preceding claim, characterized in that the Schraubeneinfädelmittel (33) by at least one longitudinal axis of the fastening screw (15) inclined sliding surface (35) is formed, wherein the sliding surface (35) to the diameter of the Verschraubungsmittels (19) rejuvenated.
11. Verfahren zur Montage einer Hitzeschildelementanordnung (1) nach einem vorhergehenden Anspruch, dadurch gekennzeichnet, dass11. A method for assembling a heat shield element arrangement (1) according to any preceding claim, characterized in that
- das Hitzeschildelement (3) in einer senkrechten zur Tragstruktur (30) Montagebewegung an seine zwischen benachbarten Hitzeschildelementen auf der Tragstruktur vorgesehene Position gebracht wird, und- The heat shield element (3) in a vertical to the support structure (30) assembly movement to its between adjacent Heat shield elements placed on the support structure provided position, and
- die Befestigungsschrauben (15) in jeweiliges trichterförmiges Schraubeneinfädelmittel (33) eingefädelt und in das in der Tragstruktur (30) vorgesehene Verschraubungs- mittel (19, 22) eingeschraubt werden.- Threaded the fastening screws (15) in respective funnel-shaped Schraubeneinfädelmittel (33) and in the provided in the support structure (30) Verschraubungs- means (19, 22) are screwed.
12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass die Befestigungsschrauben (15) vorher an dem Hitzeschildelement (3) angebaut werden.12. The method according to claim 11, characterized in that the fastening screws (15) are previously attached to the heat shield element (3).
13. Verwendung der Hitzeschildelementanordnung (1) nach einem vorhergehenden Anspruch zum Ausbilden eines Hitzeschildes, insbesondere eines Schlusssteines oder Attrappensteines (3) des Hitzeschildes, einer Brennkraftmaschine, insbesondere einer Turbine. 13. Use of the heat shield element arrangement (1) according to any preceding claim for forming a heat shield, in particular a capstone or dummy stone (3) of the heat shield, an internal combustion engine, in particular a turbine.
PCT/EP2010/056649 2009-06-09 2010-05-14 Heat shield element arrangement comprising screw threading means and method for installing a heat shield element WO2010142510A1 (en)

Priority Applications (4)

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RU2011153264/06A RU2516713C2 (en) 2009-06-09 2010-05-14 System of heat-shielding screen with elements for insertion of screws and method to install element of heat-shielding screen
EP10721767.1A EP2440851B1 (en) 2009-06-09 2010-05-14 Heat shield element assembly with screw guiding means and method for installing same
ES10721767.1T ES2527174T3 (en) 2009-06-09 2010-05-14 Thermal screen element arrangement with screw guide means and procedure for mounting a thermal screen element
CN201080025610.7A CN102460022B (en) 2009-06-09 2010-05-14 Heat shield element arrangement comprising screw threading means and method for installing a heat shield element

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EP09162244A EP2261564A1 (en) 2009-06-09 2009-06-09 Heat shield element assembly with screw guiding means and method for installing same

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DE102014204472A1 (en) * 2014-03-11 2015-09-17 Rolls-Royce Deutschland Ltd & Co Kg Combustor shingle of a gas turbine
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EP2711634A1 (en) * 2012-09-21 2014-03-26 Siemens Aktiengesellschaft Heat shield with a support structure and method for cooling the support structure
DE102012022199A1 (en) 2012-11-13 2014-05-28 Rolls-Royce Deutschland Ltd & Co Kg Combustor shingle of a gas turbine
ITUB20155786A1 (en) * 2015-11-23 2017-05-23 Leonardo Mattoni FIXING DEVICE BETWEEN TWO PARTS WITH SPRING DRAFT
RU209216U1 (en) * 2021-08-30 2022-02-07 Антон Владимирович Новиков HEAT SHIELD FOR GAS TURBINE COMBUSTION CHAMBER
RU209161U1 (en) * 2021-12-01 2022-02-03 Антон Владимирович Новиков HEAT SHIELD FOR GAS TURBINE COMBUSTION CHAMBER
CN116291871B (en) * 2023-05-16 2023-07-21 北京航空航天大学 Low-constraint high-damping connection structure between afterburner heat shield and casing

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EP2440851A1 (en) 2012-04-18
RU2011153264A (en) 2013-07-20
ES2527174T3 (en) 2015-01-21
CN102460022A (en) 2012-05-16
EP2440851B1 (en) 2014-11-26
CN102460022B (en) 2015-05-06
EP2261564A1 (en) 2010-12-15

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