EP3964753A1 - Joint d'étanchéité destiné à l'utilisation dans un élément pare-chaleur - Google Patents

Joint d'étanchéité destiné à l'utilisation dans un élément pare-chaleur Download PDF

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Publication number
EP3964753A1
EP3964753A1 EP20194800.7A EP20194800A EP3964753A1 EP 3964753 A1 EP3964753 A1 EP 3964753A1 EP 20194800 A EP20194800 A EP 20194800A EP 3964753 A1 EP3964753 A1 EP 3964753A1
Authority
EP
European Patent Office
Prior art keywords
seal
heat shield
groove
height
shield 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Withdrawn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
EP20194800.7A
Other languages
German (de)
English (en)
Inventor
Andreas Böttcher
Andre Kluge
Tobias Krieger
Kai-Uwe Schildmacher
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 Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
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 Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Priority to EP20194800.7A priority Critical patent/EP3964753A1/fr
Priority to CN202180056511.3A priority patent/CN116097038A/zh
Priority to EP21739593.8A priority patent/EP4146985A1/fr
Priority to PCT/EP2021/067641 priority patent/WO2022048809A1/fr
Publication of EP3964753A1 publication Critical patent/EP3964753A1/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Withdrawn legal-status Critical Current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
    • F23R3/002—Wall structures
    • 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
    • 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
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/00012—Details of sealing devices
    • 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
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/00017—Assembling combustion chamber liners or subparts

Definitions

  • the invention relates to a seal for use in a heat shield element of a combustion chamber, by means of which an uncontrolled flow of cooling air is to be prevented.
  • Heat shield elements are often used in combustion chambers, in particular in gas turbines.
  • both heat shield elements made of a ceramic material and of a metallic material are known.
  • the task is to equip the inside of the combustion chamber with a component that is as robust as possible and yet replaceable.
  • cooling of the heat shield elements by means of cooling air is generally used. The cooling air is fed to the underside of the heat shield elements, the aim being to prevent an uncontrolled flow between the heat shield elements into the combustion chamber.
  • seals are used, which are inserted into grooves on circumferential webs on the underside of the heat shield elements.
  • the seals have a rectangular cross section and essentially extend over the length or width of the heat shield elements.
  • the seal rests on a support structure and thus effects the seal.
  • a heat shield element has a hot side, which is directed towards the interior of a combustion chamber, and an opposite cold side, which is directed towards a supporting structure of the combustion chamber. Furthermore, the heat shield element has a sealing groove which extends in a longitudinal direction. It is irrelevant whether the longitudinal direction coincides with a longitudinal axis of the combustion chamber or runs transversely thereto. At least the seal is inserted in the seal groove as intended, and accordingly runs along the longitudinal direction and thus also has a hot side and an opposite cold side.
  • the surface of the seal on the hot side is referred to below as the groove surface.
  • the seal has a seal length from one end to the opposite end. The distance between the opposite side flanks forms the seal width. The distance from the groove surface to the contact surface defines the seal height.
  • the seal is provided with recesses. These are arranged on the cold side and extend along the longitudinal direction.
  • the recesses penetrate the seal starting from the contact surface in the direction of the hot side.
  • the recesses represent a material removal from the regular sealing profile between the two side flanks.
  • the seal can no longer rest on a support structure over the entire seal length.
  • the contact surface is understood to be the surface that would be present without the recesses, i.e. the entire surface on the cold side over the entire length of the seal.
  • a quasi-leaking seal is formed by the recesses, as a result of which there is no need to drill holes in the heat shield element. Now one could come up with the idea of forming the seal on the cold side unevenly and inappropriately to the supporting structure. However, it is then almost impossible to predict the cooling air flow. In contrast, with the targeted introduction of the recesses, it is possible to set a desired flow of cooling air.
  • the seal is preferably made of a metallic material.
  • the necessary temperature resistance as well as the longevity in the intended use can be achieved on a heat shield element while retaining the elastic properties.
  • a cost-effective production as well as an advantageous adjustment of the seal in the seal groove is achieved when the seal has a constant seal width.
  • the two side flanks thus run parallel to one another.
  • sealing groove runs in a straight line when the cold side is viewed from above, it is advantageous if the two side flanks are flat.
  • the cutouts extend along the longitudinal direction over a length of at least 0.1 times the length of the seal.
  • the existing gaps are considered when adding their individual lengths.
  • the recesses extend over a total of at least 20% of the length of the seal.
  • the cut-outs should not be too long, so that in total they extend over a maximum of 40% of the length of the seal. It is particularly advantageous here if the total length of the recesses is at most 0.3 times the length of the seal.
  • the recesses have a depth measured from the contact surface of at least 0.05 times the seal height at the same point. It is particularly advantageous if the depth of the recess is at least 10% of the height of the seal. In contrast, it is advantageous if the depth is a maximum of 40% of the seal height. It is particularly advantageous here if the depth of the recesses is at most 0.2 times the height of the seal.
  • a nominal height can be defined for the seal as the nominal distance from the groove surface to the contact surface. It is advantageous if the seal height largely corresponds to the nominal height. This is taken for granted if over at least 80% of the seal length, the seal height does not deviate more than 10% from the nominal height.
  • the sealing height is reduced towards the respective end on at least one end section, particularly preferably on both opposite end sections.
  • the seal height at the end of the seal should preferably be less than 50% of the nominal height.
  • the reduction in the seal height on the hot side is brought about by a corresponding approximation of the groove surface to the contact surface. It can be provided that the change in the seal height is effected in steps or by a bevel. However, an arcuate progression from the approximate nominal height to the reduced height at the end of the seal is advantageous.
  • At least one end section, particularly advantageously at both end sections, on the hot side is objected to by an elevation from the respective end is arranged.
  • a relatively small elevation is sufficient here, which enables a defined contact on the hot side.
  • the elevation relative to the adjacent groove surface is at least 0.01 times the nominal height, i.e. 1% of the nominal height, and at most 0.1 times the nominal height, i.e. 10% of the nominal height. In this way, with a uniformly shaped sealing groove, a targeted and thus defined support can be brought about by means of the elevations.
  • an indentation on the hot side is advantageously arranged at an end section at a distance from the end.
  • the recess has a depth of at least 5% and a maximum of 20% of the nominal height.
  • the Indentation can be used to provide longitudinal fixation of the seal. If there is a ridge on the same end portion, the depression is preferably between the end and the ridge.
  • the newly created seal according to the invention enables the realization of a new heat shield element according to the invention for use in a heat shield of a combustion chamber by using a seal as described above.
  • the heat shield includes a support structure on which several heat shield elements are mounted, with the contact surfaces of the respective seals resting on the support structure. This creates a free cooling air cross-section along the length of the recesses.
  • a complete contact of the contact surfaces of the respective seals on the support structure can advantageously be brought about by the seals being elastically deformed during assembly of the heat shield element.
  • the seal with the contact surface is shaped in such a way that the distance between the groove surface and the groove bottom in the area between the end sections is reduced by the installation compared to the stress-free position before the installation. This can be beneficial It must be ensured that the desired flow of cooling air can flow through the recesses without any significant additional leakage occurring.
  • a seal 11 according to the invention is sketched in a perspective view of the contact surface 14 .
  • the seal extends along a longitudinal direction from one end to the opposite end.
  • a curved shape can be seen, which results from the shape of the combustion chamber and thus of the heat shield element 01.
  • the narrow visible side with the arcuate shape is the contact surface 14.
  • the flat side flank 19 is visible transversely to this.
  • the seal height 21 decreases significantly towards the end.
  • an exemplary heat shield element 01 is outlined in a perspective view. Shown is the heat shield element 01 with the cold side 04, with the hot side 03 not being visible opposite. The hot side 03 faces the interior of the combustion chamber. It can also be seen that the heat shield element 01 has a circumferential web that extends from the hot side 03 to the cold side 04 . On two opposite side edges, the webs have a sealing groove 05 each extending in a longitudinal direction.
  • Seal 11 is also shown here - as in 1 shown - installed in the seal groove on the left side of the illustration.
  • the use of a corresponding seal with recesses is also provided.
  • a seal with recesses in a transverse web is used.
  • the seal 11 extends along a longitudinal direction and has an arcuate course.
  • Opposite is the contact surface 14, which 14 comes to rest on a support structure 09 when the heat shield element 01 is installed.
  • the distance from the useful surface 13 to the contact surface 14 forms the seal height 21. This is essentially constant except for the two end sections 15 and 16 and corresponds to a nominal height of the seal 11.
  • the two opposite side flanks 19 are flat here, so that the seal 01 has a constant seal width.
  • the recesses 12 can again be seen, which are arranged on the cold side 04 and, starting from the contact surface 14, extend in the direction of the hot side 03.
  • the recesses 12 have a depth 22 which corresponds to approximately 0.3 times the height 21 of the seal in this exemplary embodiment.
  • an embodiment with a slightly smaller depth than shown here is advantageous.
  • the different shape of the end sections 15 and 16 can also be seen.
  • the distance from the useful surface 13 to the contact surface 14 decreases towards the end, so that the height at the two opposite ends of the seal is approximately 0.3 times the nominal height - im Substantially corresponding to the seal height 21 in the course between the end portions 15, 16 - is reduced.
  • elevation 17 on each of the two end sections 15, 16.
  • the height of the elevation 17 compared to the adjacent groove surface 13 is selected to be relatively small.
  • the task of the elevations 17 is in particular to produce a defined support on a groove base 06 of the sealing groove 05.
  • FIG. 6 and 7 a detailed view of the heat shield element 01 with the seal 11 is shown in cross section.
  • the heat shield element 01 can be seen with the web shown here, which extends from the hot side to the cold side 04 and has the sealing groove 05 on the cold side 04 .
  • the seal 11 is located in the seal groove 05, with the recess 12 being located on the cold side 04.
  • the Figures 8-10 the arrangement of the seal 11 on the heat shield element 01 in a longitudinal section, ie along the longitudinal direction. How from the 8 As can be seen, the seal 11 is accommodated in the seal groove 05. The seal 11 with the two elevations 17, which 17 are located on the end sections 15 and 16, rests on the groove base 06 of the seal groove 05. In contrast, there is a free space between the end sections 15 and 16 between the groove surface 13 and the groove bottom 06.
  • the seal 11 is deformed - see 9 - with a reduction in the distance from the groove surface 13 to the groove bottom 06.
  • Essential for the invention are the recesses 12 in the seal 11, which 12 largely independent of the deformation of the heat shield element 01 ensures a controlled flow of cooling air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Gasket Seals (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP20194800.7A 2020-09-07 2020-09-07 Joint d'étanchéité destiné à l'utilisation dans un élément pare-chaleur Withdrawn EP3964753A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20194800.7A EP3964753A1 (fr) 2020-09-07 2020-09-07 Joint d'étanchéité destiné à l'utilisation dans un élément pare-chaleur
CN202180056511.3A CN116097038A (zh) 2020-09-07 2021-06-28 用于在热屏蔽元件中使用的密封件
EP21739593.8A EP4146985A1 (fr) 2020-09-07 2021-06-28 Joint destiné à être utilisé dans un élément de bouclier thermique
PCT/EP2021/067641 WO2022048809A1 (fr) 2020-09-07 2021-06-28 Joint destiné à être utilisé dans un élément de bouclier thermique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20194800.7A EP3964753A1 (fr) 2020-09-07 2020-09-07 Joint d'étanchéité destiné à l'utilisation dans un élément pare-chaleur

Publications (1)

Publication Number Publication Date
EP3964753A1 true EP3964753A1 (fr) 2022-03-09

Family

ID=72422125

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20194800.7A Withdrawn EP3964753A1 (fr) 2020-09-07 2020-09-07 Joint d'étanchéité destiné à l'utilisation dans un élément pare-chaleur
EP21739593.8A Pending EP4146985A1 (fr) 2020-09-07 2021-06-28 Joint destiné à être utilisé dans un élément de bouclier thermique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21739593.8A Pending EP4146985A1 (fr) 2020-09-07 2021-06-28 Joint destiné à être utilisé dans un élément de bouclier thermique

Country Status (3)

Country Link
EP (2) EP3964753A1 (fr)
CN (1) CN116097038A (fr)
WO (1) WO2022048809A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8479524B2 (en) * 2008-11-25 2013-07-09 Alstom Technology Ltd. Combustion chamber arrangement for operating a gas turbine
US20140144148A1 (en) * 2012-11-27 2014-05-29 United Technologies Corporation Cooled Combustor Seal
US20150354818A1 (en) * 2014-06-04 2015-12-10 Pratt & Whitney Canada Corp. Multiple ventilated rails for sealing of combustor heat shields

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2049840B1 (fr) * 2006-08-07 2018-04-11 Ansaldo Energia IP UK Limited Chambre de combustion d'une installation de combustion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8479524B2 (en) * 2008-11-25 2013-07-09 Alstom Technology Ltd. Combustion chamber arrangement for operating a gas turbine
US20140144148A1 (en) * 2012-11-27 2014-05-29 United Technologies Corporation Cooled Combustor Seal
US20150354818A1 (en) * 2014-06-04 2015-12-10 Pratt & Whitney Canada Corp. Multiple ventilated rails for sealing of combustor heat shields

Also Published As

Publication number Publication date
EP4146985A1 (fr) 2023-03-15
WO2022048809A1 (fr) 2022-03-10
CN116097038A (zh) 2023-05-09

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