EP3309456A1 - Écran thermique avec carreau et support - Google Patents

Écran thermique avec carreau et support Download PDF

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Publication number
EP3309456A1
EP3309456A1 EP16193629.9A EP16193629A EP3309456A1 EP 3309456 A1 EP3309456 A1 EP 3309456A1 EP 16193629 A EP16193629 A EP 16193629A EP 3309456 A1 EP3309456 A1 EP 3309456A1
Authority
EP
European Patent Office
Prior art keywords
fastening
heat shield
tile
edge
carrier element
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.)
Withdrawn
Application number
EP16193629.9A
Other languages
German (de)
English (en)
Inventor
Andreas Böttcher
Tobias Krieger
Patrick Lapp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP16193629.9A priority Critical patent/EP3309456A1/fr
Priority to PCT/EP2017/073075 priority patent/WO2018068980A1/fr
Publication of EP3309456A1 publication Critical patent/EP3309456A1/fr
Withdrawn legal-status Critical Current

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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
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
    • F23R3/60—Support structures; Attaching or mounting means

Definitions

  • the invention relates to a heat shield element comprising a ceramic tile element and a metallic support element for use in a heat shield of a combustion chamber.
  • a heat shield element which has a ceramic heat shield plate on the lying to the combustion chamber interior hot side and on the opposite side facing away from the combustion chamber inside a metallic support plate. It is provided that the carrier plate can be fixed by means of a fastening bolt in a support structure of the combustion chamber.
  • the attachment of the heat shield plate to the support plate by means of so-called stone holder. These are inserted for attachment to the support plate in existing therein extending in the plane of the support plate receiving grooves.
  • the stone holder are fixed in a direction perpendicular to the plane of the heat shield element.
  • For attachment to the heat shield plate has this on two opposite sides laterally outwardly opening retaining grooves.
  • a double-angled hook which engages in the retaining groove of the heat shield plate.
  • the heat shield plate is placed on the support plate and then the stone holder can be inserted into the grooves in the support plate from opposite sides, wherein at the same time engage the hooks in the outwardly opening retaining groove on the heat shield plate.
  • a disadvantage of the previous embodiment is that the assembly of the heat shield element with the plurality of stone holders is not without problems.
  • a stone holder dissolves again before mounting the heat shield element in the combustion chamber, i. slipping out of the retaining groove, thus complicating or preventing assembly.
  • Another disadvantage is, in particular when replacing metallic heat shield elements, that the stone holder attack the outside of the ceramic heat shield plate and thus protection of the stone holder on the side of the heat shield element protection against an inadmissible load by the hot gases in the combustion chamber is required.
  • the object of the present invention is therefore to realize an improved embodiment of a heat shield element with a combination of a ceramic tile element and a metallic support element.
  • the generic heat shield element is initially intended to form a heat shield of a combustion chamber.
  • the heat shield element comprises on the one hand a tile element and on the other hand a carrier element.
  • the tile element consists here, at least in majority, of a ceramic material, so that a higher temperature resistance is achieved. Which material this is exactly, is initially irrelevant.
  • the tile element here has a wall extending along the heat shield with a hot side facing the combustion chamber and an opposite cold side and along a side edge of the wall a first edge portion and at the opposite end of the wall along the side edge a second edge portion. It is provided that in each case at least one fastening receptacle is present in the region of the edge sections, i.
  • the carrier element is at least majority, advantageously completely made of a metallic material. In this way, in particular, it is achieved that a higher tensile strength and breaking strength is achieved in the carrier element. From which material exactly the carrier element is made, again is irrelevant in the first place. Furthermore, it is provided that a fastening means is used, by means of which the carrier element and thus the heat shield element can be fixed in the combustion chamber.
  • the carrier element is arranged on the cold side of the tile element and in this case is connected by means of fastening projections with the tile element.
  • the carrier element in each case has at least one first fastening projection for arrangement on the first fastening receptacle and a second fastening projection for arrangement on the second fastening receptacle.
  • first fastening projections for arrangement on the first fastening receptacle
  • second fastening projection for arrangement on the second fastening receptacle.
  • at least two first fastening projections and at least two second fastening projections are used. How the fastening projections are in turn attached to the carrier element, initially irrelevant.
  • the fastening projections are integrally formed by the carrier element.
  • the carrier element contrary to the embodiment in the prior art is not a subsequent attachment of stone holders for connecting the tile element with the support member but rather is made possible by an advantageous design of the support member with existing mounting projections a direct attachment of the support member on the tile element for use in the combustion chamber.
  • the assembly of the heat shield element is simplified and to which a loss of stone holders in the assembly of the heat shield element in the combustion chamber is no longer possible.
  • the tile element can be produced analogously to generic heat shield tiles and thus consist of a similar material. However, it is particularly advantageous if the tile element is designed as a fiber-reinforced ceramic. These so-called CMC materials offer, in contrast to a regular ceramic without fiber content, a higher thermal shock and breaking strength.
  • the carrier element has at least one fastening bore, particularly preferably in the middle in the wall, wherein a fastening bolt with a fastening head is used as fastening means. It is provided that the fastening bolt penetrates the mounting hole in the carrier element and the fastening head is positioned between the tile element and the carrier element.
  • the fixing hole has a diameter equal to or larger than the fixing bolt and smaller than the diameter of the mounting head. In this way, on the one hand, it is achieved that the fastening means can furthermore be optimally protected by the tile element in the best possible manner against the high temperature prevailing in the combustion chamber and, moreover, a loss of the fastening bolt can be prevented.
  • the installation of the heat shield element in the combustion chamber can take place in different ways, wherein in one embodiment it may be provided, for example, that a screw is screwed into the carrier element from a rear side of the support structure of the combustion chamber, wherein a threaded bore in the carrier element forms the attachment means.
  • a screw can also be used a bayonet solution.
  • At least one through hole aligned with the fastening hole is present on the tile element. This has a diameter smaller than the fastening means. It is advantageous if the through hole is sufficiently large, so that a tool for the fastening means can pass through the through hole and thus is made larger than a drive in the mounting head. This will undiminished ensures that the fastener is not lost as a fastening bolt through the arrangement of the mounting head between the support element and tile element and a fastening of the fastening bolt by attaching a tool from the combustion chamber inside is possible.
  • the fastening means is provided with a cooling air duct in a particularly preferred manner.
  • the cooling air duct has an inlet opening below the carrier element, ie on the side of the carrier element pointing away from the tiling element. At least one is opposite to provide outlet opening in the region between the support element and the tile element. This can be provided in a simple and advantageous manner, the outlet opening in the mounting head, for example. In the drive.
  • a sheet such as a steel sheet, is used for the production. This can be lasered, for example, whereby subsequently the fastening projections and the fastening bore are reworked as required.
  • the tile element in a particularly preferred manner on a peripheral edge surrounding the support laterally.
  • the carrier element is protected by the lateral edge of the tile element as well as when hot gas penetrates into a gap between two heat shield elements.
  • the surrounding edge here comprises the first edge section and the opposite second edge section.
  • first edge section and the second edge section each extend at least in sections beyond the carrier element.
  • an advantageous protection of the carrier element by the tile element can be achieved.
  • this circumferential edge extends beyond the carrier element on the side facing away from the combustion chamber interior side up to a rear contact surface.
  • the contact surface can in this case be both flat and have a three-dimensional shape. Particularly advantageous is the approximation of the contact surface to the respective support structure on which the heat shield element is to be mounted.
  • the embodiments of the fastening receptacles are initially irrelevant, provided that the attachment of the support member is possible with the integrally comprehensive mounting projections.
  • the fastening receptacles can open both to the opposite side, as it is also possible, analogous to the generic version, the fastener receptacles on the respective edge portion assigning opening perform.
  • first and / or second attachment receptacle is located directly in the first or in the second edge section. It is necessary that the fastening receptacles each open to the opposite edge portion. Thus, the first and / or second attachment receptacle on the cold side of the center of the tile element is accessible.
  • fastening receptacles are two alternatives available, it being provided in a first alternative that the first and / or second attachment receptacle penetrates the first and the second edge portion. This simplifies both the realization of the fastening receptacle in the edge portion and also the transmission of the forces occurring from the support element on the tile element can be better ensured over the edge portion.
  • first edge section and / or the second edge section at least in the region of the first or second fastening receptacle, particularly advantageously completely, closed.
  • This embodiment favors protection from possible hot gas in a gap between two heat shield elements.
  • first or the second Edge portion has a sufficient strength, so that the fastening receptacles in the respective edge portion can be introduced to the inside opening.
  • the attachment receptacle surrounding a thickening extending to the opposite side can be provided on the edge section.
  • first fastening receptacle or the second fastening receptacle starting from the first or the second fastening projection fastened therein, forms a free space pointing toward the hot side.
  • a corresponding free space is available in the first fastening receptacle and the second fastening receptacle. This space advantageously allows easy mounting of the support element on the tile element.
  • the support member in an inclined position obliquely with the first (or vice versa with the second) mounting projections in the corresponding enlarged by the free space first (or vice versa second) mounting receptacle are inserted, wherein in the following a pivoting of the support member to the cold side and a pushing back with Filling the opposite second fastening projections in the second fastening receptacle (or conversely, the first fastening projections in the first fastening receptacle) is possible.
  • the tiling element to provide an opening to the inside longitudinal groove on the first and second edge portion
  • the first and second Edge portion a plurality of each spaced first and second fastening receptacles are present, in each of which corresponding first and second fastening projections engage.
  • the fastening receptacles on the first edge portion and the second fastening receptacles on the second edge portion respectively be carried out the same way. Accordingly, the first fastening projections on the first edge portion and the second fastening projections on the second edge portion can each be made similar.
  • the at least two fastening projections on the first edge section and the at least two second fastening projections on the second edge section in arrangement on at least two first fastening receptacles on the first edge section and two second fastening receptacles on the second edge section enable an advantageous load transfer from the carrier element to the tile element.
  • An unintentional release of the carrier element from the tile element can be achieved in a simple manner already by the mounting of the heat shield element in the combustion chamber.
  • a displacement of the tile element relative to the carrier element can be made more difficult on the one hand by clamping the tile element on the support structure and on the other hand by the arrangement of adjacent heat shield elements.
  • it is advantageous to use a fixation which makes the displacement between the support element relative to the tile element at least difficult or particularly advantageous completely prevented.
  • a locking pin is used.
  • the tile element has a locking receptacle extending from the cold side.
  • the carrier element likewise has a locking receptacle which is arranged in alignment with the position of the arresting receptacle in the tile element.
  • an elastic locking spring is used for fixing.
  • the tile element has a locking bearing on which the locking spring comes to rest in the mounted state.
  • the arrangement of the locking spring on the carrier element can be done in different ways, wherein it is provided in a first embodiment that the locking spring is mounted on the carrier element. Likewise, it is conceivable to deform a portion of the support member such that it forms the locking spring.
  • a first detent contour surrounding the fastening bore is present on the carrier element on the side facing the tiling element, the fastening means having a second detent contour complementary to the first detent contour.
  • a heat shield element By realizing a heat shield element according to the invention, the realization of a heat shield according to the invention is made possible by the use of a corresponding heat shield element according to the invention.
  • a plurality of spring devices are installed in the support structure or are attached to the rear, on each of which a fastening means of the respective heat shield element engages. In this way it can be ensured that the support of the heat shield element is ensured on the support structure during vibrations.
  • first edge portion and the second edge portion at least partially rest under tension on the support structure. It when the peripheral edge of the tile element rests on the support structure is particularly advantageous.
  • FIG. 1 is a heat shield element 01 in a perspective view from below, ie on the bottom 34 and cold side 14, sketched in half section.
  • the tile element 11 arranged on the side facing the combustion chamber interior and the support element 31 fastened below the tile element 11 can be seen.
  • the fastening of the support element 31 in the combustion chamber and thus of the heat shield element 01 takes place by means of the fastening means 41 in the form of a fastening bolt.
  • the tile element 11 has a hot side 13 (concealed in this view) on the side facing the combustion chamber interior and, opposite, a cold side 14.
  • the hot side 13 and cold side 14 are formed by the wall 12 of the tiling element 11 extending along the heat shield of the combustion chamber.
  • An edge 21, which comprises a first edge section 26 and an opposite second edge section 27, is located peripherally on the side edges of the wall 12. In this case, the peripheral edge 21 extends to a rear contact surface 25 and has an edge outer surface 23 adjacent to the hot side and an edge inner surface 24 adjoining the cold side 14.
  • the carrier element 31 extends parallel to the substantially planar tiled element 11 and can be produced, for example, from a laser-cut metal sheet.
  • the carrier element 31 has an upper side 33 facing the cold side 14 of the tiling element 11 (hidden in this view) and lying opposite one another a bottom 34. It is provided that a free distance between the top 33 and the cold side 14 is present, so that an immediate heat transfer from the tile element 11 is prevented on the support member 31.
  • the carrier element 31 can be mounted in the combustion chamber by means of a fastening means 41.
  • the fastening means 41 in the form of a fastening bolt penetrates a fastening bore 35 in the carrier element 31, wherein a fastening head 42 is located between the carrier element 31 and the tile element 11.
  • connection according to the invention between the tile element 11 and the carrier element 31 is achieved by the integral arrangement of first attachment projections 36 on the carrier element 31 on the first edge section 26 6 and the arrangement of second attachment projections 37 on the second edge section 27, wherein the attachment projections 36, 37 in the respective Mounting receivers 16, 17 engage.
  • FIG. 2 shows again the FIG. 2 the tile element 11 from the execution FIG. 1
  • FIG. 1 In a perspective view with a view of the hot side 13 of the tile element 11. It can be seen in turn the substantially planar shape of the wall 12 of the tile element 11 and the surrounding edge 21 with the first edge portion 26, 26 in which the first mounting receptacles 16 are located. Centered in the tile element 11 is a through hole 15 for attachment of a tool on the fastening means 41st
  • FIG. 3 shows the support member 31 in a perspective view with a view of the top 33. It can be seen the planar shape of the support member 31 with the centrally located mounting hole 35 for attachment of the fastener 41. Surrounding the fastening bore 35 is a detent contour 38, which serves to secure the position of the fastening means 41. Furthermore, the arrangement of a locking receptacle 39 as a bore parallel to the mounting hole 35 is essential. The integral arrangement of the first fastening projections 36 on the first edge section 26 and the second fastening projections 37 on the second edge section 27 is essential.
  • FIG. 4 shows for this purpose the fastening means 41 for execution FIG. 1 , Evident is in a perspective view and in half section, the execution of the fastening bolt with a mounting head 42, which 42 also has a latching contour 48 on the underside. Centered on top is a drive for attaching a tool. To prevent overheating of the fastening means, in particular due to the existing in the tile element 11 through hole 15, this has a cooling air channel 43 which 43 extends with an inlet opening below the support member 31 to an opening in the drive in the region between the support member 31 and tile element 11 ,
  • FIG. 5 shows this again the embodiment FIG. 1 on average in mounting on a support structure 03 of the combustion chamber, wherein the FIG. 6 the presentation FIG. 5 sketched in exploded view.
  • Surrounding the circumferential edge 21 is located on one side with the first edge portion 26 and opposite the second edge portion 27.
  • the first mounting receptacles 16 and the second edge portion 27, the second mounting receptacles 17 are arranged.
  • the through holes 16, 17 penetrate the respective edge portions 26, 27 from the edge outer surface 23 to the edge inner surface 24. Furthermore, the through hole 15 and a locking receptacle 19 on the cold side 14 of the tile element 11 for attaching the locking pin 51.
  • the attachment 41st is listed in the form of a mounting bolt with a mounting head 42, which 42 has on the underside a latching contour 48 for securing the position of the fastening means 41 when mounted in the combustion chamber.
  • the fastening means 41 is in this case penetrated by a cooling air channel 43, which 43 extends from the underside of the support structure 03 of the combustion chamber into the region between the support element 31 and the tile element 11, in this case into the drive.
  • the substantially planar support element 31 has the upper side 33 facing the cold side 14 of the tile element 11 and an underside 34 opposite it. In the middle is the mounting hole 35 for attachment of the fastener 41 with surrounding locking contour 38. Consistent with the position of the locking receptacle 19 in the tile element 11 is the locking receptacle 39 in the support member 31st
  • first attachment projection 36 of the support element 31 within the first attachment receptacle 16 of the first edge portion 26 is opposite.
  • Opposite is the second attachment projection 37 of the support member 31 in the second attachment receptacle 17 of the second edge portion 27.
  • the first fastening receptacle 16 has a free space beyond the size of the first fastening projection 36, which allows mounting of the support element 31 on the tile element 11.
  • the support member 31 are inserted in a slightly inclined position, first with the first mounting projection 36 in the first mounting receptacle 16, wherein by subsequent pivoting up of the support member 31 parallel to the tile element 11th an insertion of the second fastening projections 37 in the second fastening receptacles 17 can take place.
  • the locking pin 51 is inserted, which 51 is secured by the attachment of the heat shield element 01 on the support structure 03 against loss.
  • FIG. 7 an alternative embodiment for a heat shield element 51 in section is analogous FIG. 5 sketched, whereby analogous to the previous example in FIG. 8 an exploded view of the tile element 61 used here and the support member 81 is sketched.
  • the fastening receptacles 66 on the first edge portion 67 and the second fastening receptacles 76 on the second edge portion 77 do not penetrate the respective edge portion 76, 77. Rather, the fastening receivers 66, 67 extend from the respective edge section 76, 77 to the inside and thus penetrate only the peripheral edge surface 24.
  • the support element 81 analogous to the previous embodiment first fastening projections 86 and opposite second fastening projections 87.
  • the carrier element 81 is first inserted in an inclined position in an enlarged first mounting receptacle 66, wherein by subsequent pivoting of the support member 81 to the tile element 61 and a pushing back in the opposite direction inserting the second mounting projections 87 in the second attachment receptacles 67 takes place.
  • an alternative locking option for securing the position of the support member 81 on the tile element 61 is outlined.
  • a locking bearing 69 is provided extending from the cold side. This 69 serves as an abutment for an elastic locking spring 89, which 89 formed integrally with the support member 81 in this embodiment is.
  • the locking spring 89 is mounted on the carrier element 81.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Connection Of Plates (AREA)
EP16193629.9A 2016-10-13 2016-10-13 Écran thermique avec carreau et support Withdrawn EP3309456A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16193629.9A EP3309456A1 (fr) 2016-10-13 2016-10-13 Écran thermique avec carreau et support
PCT/EP2017/073075 WO2018068980A1 (fr) 2016-10-13 2017-09-14 Élément d'écran thermique à carreau et support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16193629.9A EP3309456A1 (fr) 2016-10-13 2016-10-13 Écran thermique avec carreau et support

Publications (1)

Publication Number Publication Date
EP3309456A1 true EP3309456A1 (fr) 2018-04-18

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ID=57184304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16193629.9A Withdrawn EP3309456A1 (fr) 2016-10-13 2016-10-13 Écran thermique avec carreau et support

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EP (1) EP3309456A1 (fr)
WO (1) WO2018068980A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019200593A1 (de) * 2019-01-17 2020-07-23 Siemens Aktiengesellschaft Brennkammer
DE102019219845A1 (de) * 2019-12-17 2021-06-17 Siemens Aktiengesellschaft Hitzeschildkachel für eine Brennkammer sowie Brennkammer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1128131A1 (fr) * 2000-02-23 2001-08-29 Siemens Aktiengesellschaft Bouclier thermique, chambre de combustion et turbine à gaz
EP1533574A1 (fr) * 2003-11-24 2005-05-25 Siemens Aktiengesellschaft Chambre de combustion pour turbine à gaz avec des éléments de revêtement et procédé pour appliquer ou enlever ces éléments
EP1715248A1 (fr) * 2005-04-19 2006-10-25 Siemens Aktiengesellschaft Élément de fixation et portion correspondante d'un bouclier thermique ainsi que chambre de combustion munie d'un tel bouclier
EP2270395A1 (fr) * 2009-06-09 2011-01-05 Siemens Aktiengesellschaft Agencement d'élément de bouclier thermique et procédé de montage d'un élément de bouclier thermique
EP2728255A1 (fr) * 2012-10-31 2014-05-07 Alstom Technology Ltd Agencement de segment de gaz chaud
EP2409083B1 (fr) 2009-03-17 2015-07-29 Siemens Aktiengesellschaft Élément de protection thermique d'un bouclier thermique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7278820B2 (en) * 2005-10-04 2007-10-09 Siemens Power Generation, Inc. Ring seal system with reduced cooling requirements

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1128131A1 (fr) * 2000-02-23 2001-08-29 Siemens Aktiengesellschaft Bouclier thermique, chambre de combustion et turbine à gaz
EP1533574A1 (fr) * 2003-11-24 2005-05-25 Siemens Aktiengesellschaft Chambre de combustion pour turbine à gaz avec des éléments de revêtement et procédé pour appliquer ou enlever ces éléments
EP1715248A1 (fr) * 2005-04-19 2006-10-25 Siemens Aktiengesellschaft Élément de fixation et portion correspondante d'un bouclier thermique ainsi que chambre de combustion munie d'un tel bouclier
EP2409083B1 (fr) 2009-03-17 2015-07-29 Siemens Aktiengesellschaft Élément de protection thermique d'un bouclier thermique
EP2270395A1 (fr) * 2009-06-09 2011-01-05 Siemens Aktiengesellschaft Agencement d'élément de bouclier thermique et procédé de montage d'un élément de bouclier thermique
EP2728255A1 (fr) * 2012-10-31 2014-05-07 Alstom Technology Ltd Agencement de segment de gaz chaud

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