EP3134682A1 - Burner assembly - Google Patents

Burner assembly

Info

Publication number
EP3134682A1
EP3134682A1 EP15788377.8A EP15788377A EP3134682A1 EP 3134682 A1 EP3134682 A1 EP 3134682A1 EP 15788377 A EP15788377 A EP 15788377A EP 3134682 A1 EP3134682 A1 EP 3134682A1
Authority
EP
European Patent Office
Prior art keywords
end plate
burner assembly
recess
radially
annular space
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.)
Granted
Application number
EP15788377.8A
Other languages
German (de)
French (fr)
Other versions
EP3134682B1 (en
Inventor
Olga Deiss
Thomas Grieb
Patrick Lapp
Jens Kleinfeld
Matthias CHLEBOWSKI
Fabian SANDER
Christian Beck
Andreas Böttcher
Patrick Ronald Flohr
Thomas Hauser
Simon Purschke
Günther WALZ
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
Publication of EP3134682A1 publication Critical patent/EP3134682A1/en
Application granted granted Critical
Publication of EP3134682B1 publication Critical patent/EP3134682B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing 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
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
    • 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
    • F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
    • F23R3/04—Air inlet arrangements
    • F23R3/10—Air inlet arrangements for primary air
    • 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
    • F23R2900/03043—Convection cooled combustion chamber walls with means for guiding the cooling air flow

Definitions

  • Burner arrangement The invention relates to a burner arrangement, in particular for a gas turbine plant.
  • the object of the invention is to provide said device wei ⁇ terzuentwickeln so forth, even at higher temperature requirements and temperature gradients clearly a high component life is ensured.
  • the invention solves this problem by providing that in such a burner arrangement with a combustion chamber, a plurality of merging into the combustion chamber mixing channels in which initiated during normal operation combustion air and fuel introduced mixed ⁇ who, the mixing channels formed by mixing tubes are axially extending through an annular space defined between a tubular outer wall, a tubular inner wall spaced radially from the outer wall, an upstream annular face plate, and a downstream annular face plate is, wherein the end plates are provided with through holes which receive and / or continue the mixing tubes and both radially inwardly and radially outwardly extending in the direction of the annulus peripheral edge, provided in the downstream annular end plate axial holes in the edge, which are substantially parallel to a normal of the face plate of
  • Annulus extending forth into the end plate and that at least one branching off from the axial bore opening for the removal of cooling air is provided.
  • cooling air can be transported in thermally stressed areas of the burner in a simple manner in order to reduce the temperature during operation or to ensure a more homogeneous temperature distribution there. This measure reduces temperature-induced stresses in the material and extends the life of the component.
  • the at least one opening opens into a chamber or a cooling air pocket which is open towards the annular space.
  • the highest thermal loads of the face plate are found in its radially outer and radially inner edges. It is therefore advantageous if holes are arranged in these areas.
  • the opening opens into an elongated recess which extends from the combustion chamber upstream in the edge of the end plate. stretches.
  • this component is made more flexible at heavily loaded areas and can thus respond better to thermal expansion without the voltage values becoming too great. It is particularly advantageous ⁇ way, therefore, when the recess is disposed radially inside the inner edge, because there the voltage values of the component are the highest. Rinsing with air from the bores serves to avoid dead zones in the well where the hot air stops.
  • the face plate continues to seal against the combustion chamber, it is advantageous if the length of the recess is smaller than the height of the edge.
  • the base of the depression has a cross-sectional profile of the set circle, oval, ellipse, so that sources of increased material tensions, such as e.g. Edges, to be avoided.
  • the openings of two holes open into a depression in such a way that opposite sides of the depression can be cooled by impingement cooling.
  • further openings are arranged in the direction of the annular space in the depression.
  • the further openings can be used as resonator openings.
  • ECM electrochemical erosion
  • EDM spark erosion
  • SLM selective laser melting
  • FIG. 1 shows a schematic sectional view of a burner arrangement
  • FIG. 2 shows an end plate with axial bores in the edge
  • FIG. 3 shows a detailed view of the front plate
  • FIG. 4 shows a further detail view of the front plate
  • FIG. 5 shows a sectional view of the bores in the front plate
  • FIG. 6 shows a front plate with elongated depressions
  • FIG. 7 shows a representation of the internal structures of a front plate
  • Figure 8 is a sectional view of the elongated recess
  • FIG 9 is a view along the axis of the recess.
  • the figures show a burner assembly 1 according to an embodiment of the present invention or components thereof.
  • the burner assembly 1 of Figure 1 comprises a
  • Combustion chamber 2 a centrally arranged pilot burner 23, a mixing tube assembly 24 with a plurality of mixing tubes 6, which form mixing channels 3, the coins ⁇ in the combustion chamber 2, the ⁇ a plurality of Brennstoffinj 25, which up to a suitable position in the mixing tubes. 6 protrude, and a mounting plate 26 which receives the mixing tube assembly 24 and serves to fasten the burner assembly 1 to a machine housing, not shown.
  • the mixing tube assembly 24 includes a tubular outer wall 8, a radially spaced from the outer wall 8 arranged tubular inner wall 9, an upstream ring ⁇ shaped end plate 10 and a downstream end plate 11, defining an annular space 7 through which the mixing tubes 6 in the axial Extend direction.
  • the end plate 11 has a both radially inward and radially outward in the direction of the annular space 7 extending peripheral edge 13, 14. Further, the mixing tube assembly 24 includes an annular partition plate 27.
  • the upstream face plate 10 includes a
  • the passage openings 12 define in the present case two bolt holes with mutually different bolt circle diameters, wherein the passage openings 12 of the first bolt circle and the through holes 12 of the second bolt circle are offset in the radial direction from each other. Furthermore, the end plate 10 has a multiplicity of numbers of air channels, not shown in FIG. 1, which extend in the axial direction and are distributed over the annular surface of the front plate 10.
  • the partition plate 27 is analogous to the face plate 10 provided with through ⁇ holes 28 which are aligned with the through holes 12 of the end plate 10 in the axial direction. Further, the partition plate 27 is provided with a plurality of scavenging air channels 29 distributed over the annular surface of the partition plate 27.
  • the downstream arranged face plate 11 comprises analogous to the end plate 10 and the partition plate 27 through holes 12 which are aligned axially with the through holes 12 of the end plate 10 and the through holes 28 of the partition plate 27. Furthermore, axially extending in the front plate 11 de air ducts 30 formed, which connect the annular space 7 with the combustion chamber 2 fluidly.
  • a fuel 5 and combustion air 4 flow through the jet nozzles, i. the mixing tubes 6, and arrive as a fuel-air mixture in the combustion chamber. 2
  • Figure 2 shows the downstream annular end ⁇ plate 11 with through holes 12 and axial holes 15 in the edge 13, 14 both radially inward and radially outward.
  • the bores 15 extend substantially parallel to a normal of the end plate 11 from the annular space 7 into the end plate 11. It can be seen in FIG. 3 that at least one opening 16 branched off from the axial bore 15 is provided for the removal of cooling air 17.
  • FIG. 4 shows how a plurality of bores 15 open into the chamber 18.
  • Figure 5 shows the same again at a different angle and in section.
  • the chambers 18 or cooling air pockets may consist of a combination of holes and cutouts or be made by other manufacturing processes.
  • the placement of the STEL len high temperature at the inner cylindrical surface and the outer cylindrical surface of the end plate lead to a Besse ⁇ ren temperature distribution and thus lower temperature-induced stresses.
  • FIG. 6 shows an embodiment of the invention with elongate depressions 19 which extend from the combustion chamber 2 upstream in the edge 13 of the end plate 11.
  • the depressions are arranged radially inward in the inner edge 13. Its length is smaller than the height of the edge 13th
  • FIG. 7 shows the structures in the interior of the edge 13 of the end plate 11.
  • two holes 15 are assigned to a recess 19.
  • the holes 15 have openings 16 for the removal of cooling air 17.
  • the recess holes 16 and the channels 31 are arranged so that ge ⁇ genüberode sides of the recess 21 may be cooled by Prallküh- lung 19th
  • FIG. 7 also shows that the base 20 of the depression 19 has a cross-sectional profile of the set circle, oval, ellipse. Furthermore, it can be seen in FIG. 7 that further openings 22 are arranged in the direction of the annular space 7 in the depression 19.
  • FIG. 8 shows a view of the same exemplary embodiment with a section through a depression 19. It shows the round base 20 of the recess 19 and the channels 31 which open into the depression 19 coming from the openings 16 of the bores 15, as well as further openings 22 starting from the depressions 19, starting in the annular space 7.
  • Figure 9 shows the view from the combustion chamber side on the edge 13 in a recess along its longitudinal axis. One recognizes the outlets of the channels 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

The invention relates to a burner assembly (1) comprising a combustion chamber (2), a plurality of mixing ducts (3) leading into the combustion chamber (2), in which mixing ducts, during intended operation, introduced combustion air (4) and introduced fuel (5) are mixed, wherein the mixing ducts (3) are formed by mixing tubes (6) which extend axially through an annular space (7) that is defined between a tubular outer wall (8), a tubular inner wall (9) arranged radially at a distance from the outer wall (8), a ring-shaped end plate (10) arranged upstream and a ring-shaped end plate (11) arranged downstream, wherein the end plates (10, 11) are provided with through-openings (12), which accommodate and/or extend the mixing tubes (6), and said end plates have, both radially inside and radially outside, a circumferential edge (13, 14) extending in the direction of the annular space (7), wherein axial bores (15) are provided in the edge (13, 14) of the ring-shaped end plate (11) arranged downstream, which axial bores extend, substantially parallel to a normal of the end plate (11), from the annual space (7) into the end plate (11), and wherein at least one opening (16) for removing cooling air (17) is provided, said opening branching from the axial bore (15).

Description

Beschreibung description
Brenneranordnung Die Erfindung betrifft eine Brenneranordnung, insbesondere für eine Gasturbinenanlage. Burner arrangement The invention relates to a burner arrangement, in particular for a gas turbine plant.
Im Zuge der Weiterentwicklung von Gasturbinen kommt es zu immer höheren Turbineneintrittstemperaturen, um gesteigerte Leistung und einen höheren Wirkungsgrad zu erreichen. Hierzu müssen u.a. entsprechende Brenner bereitgestellt werden. In the course of the further development of gas turbines, there are always higher turbine inlet temperatures in order to achieve increased performance and higher efficiency. For this purpose u.a. corresponding burners are provided.
Diese Brenner sollen auch im Hinblick auf Fertigung und Service höchsten Anforderungen genügen, weshalb u.a. auch hohe Anforderungen hinsichtlich der Lebensdauer bestehen. Insbesondere Komponenten, welche hohen Temperaturen bzw. Temperaturgradienten ausgesetzt sind, wie beispielsweise die der Brennkammer zugewandte Stirnplatte eines Brenners, erfahren im Betrieb hohe lokale Spannungen, welche u.a. zum Abplatzen keramischer Beschichtungen und somit zu frühem Bauteilversagen führen. These burners are also in terms of manufacturing and service meet the highest standards, which is why u.a. There are also high life requirements. In particular, components which are exposed to high temperatures or temperature gradients, such as the combustion chamber facing end plate of a burner experienced in operation high local voltages, which u.a. lead to flaking of ceramic coatings and thus to early component failure.
Aufgabe der Erfindung ist es, die genannte Vorrichtung wei¬ terzuentwickeln, so dass auch bei höheren Anforderungen hin- sichtlich Temperatur und Temperaturgradienten eine hohe Bauteillebensdauer gewährleistet ist. The object of the invention is to provide said device wei ¬ terzuentwickeln so forth, even at higher temperature requirements and temperature gradients clearly a high component life is ensured.
Die Erfindung löst diese Aufgabe, indem sie vorsieht, dass bei einer derartigen Brenneranordnung mit einer Brennkammer, einer Vielzahl von in die Brennkammer mündenden Mischkanälen, in denen während des bestimmungsgemäßen Betriebs eingeleitete Verbrennungsluft und eingeleiteter Brennstoff gemischt wer¬ den, wobei die Mischkanäle durch Mischrohre gebildet sind, die sich axial durch einen Ringraum erstrecken, der zwischen einer rohrförmigen Außenwand, einer radial von der Außenwand beabstandet angeordneten rohrförmigen Innenwand, einer stromaufwärts angeordneten ringförmigen Stirnplatte und einer stromabwärts angeordneten ringförmigen Stirnplatte definiert ist, wobei die Stirnplatten mit Durchgangsöffnungen versehen sind, welche die Mischrohre aufnehmen und/oder fortsetzen und sowohl radial innen als auch radial außen einen sich in Richtung des Ringraums erstreckenden umlaufenden Rand aufweisen, in der stromabwärts angeordneten ringförmigen Stirnplatte axiale Bohrungen im Rand vorgesehen sind, die sich im Wesentlichen parallel zu einer Normalen der Stirnplatte vom The invention solves this problem by providing that in such a burner arrangement with a combustion chamber, a plurality of merging into the combustion chamber mixing channels in which initiated during normal operation combustion air and fuel introduced mixed ¬ who, the mixing channels formed by mixing tubes are axially extending through an annular space defined between a tubular outer wall, a tubular inner wall spaced radially from the outer wall, an upstream annular face plate, and a downstream annular face plate is, wherein the end plates are provided with through holes which receive and / or continue the mixing tubes and both radially inwardly and radially outwardly extending in the direction of the annulus peripheral edge, provided in the downstream annular end plate axial holes in the edge, which are substantially parallel to a normal of the face plate of
Ringraum her in die Stirnplatte hinein erstrecken und dass mindestens eine von der axialen Bohrung abzweigende Öffnung zur Abfuhr von Kühlluft vorgesehen ist. Annulus extending forth into the end plate and that at least one branching off from the axial bore opening for the removal of cooling air is provided.
Dadurch lässt sich auf einfache Weise Kühlluft in thermisch belastete Bereiche des Brenners transportieren, um dort die Temperatur im Betrieb zu verringern bzw. für eine homogenere Temperaturverteilung zu sorgen. Diese Maßnahme verringert temperaturinduzierte Spannungen im Material und verlängert die Lebensdauer des Bauteils. As a result, cooling air can be transported in thermally stressed areas of the burner in a simple manner in order to reduce the temperature during operation or to ensure a more homogeneous temperature distribution there. This measure reduces temperature-induced stresses in the material and extends the life of the component.
In einer vorteilhaften Ausführungsform mündet die mindestens eine Öffnung in eine Kammer oder eine Kühllufttasche, welche zum Ringraum hin geöffnet ist. Infolge dieser Kammern oder Kühllufttaschen ist die Materialanhäufung im brennkammernahen Bereich verringert. Ferner ergibt sich eine homogenere Tempe¬ raturverteilung. Damit können die temperaturinduzierten Span- nungen deutlich verringert werden. In an advantageous embodiment, the at least one opening opens into a chamber or a cooling air pocket which is open towards the annular space. As a result of these chambers or cooling air pockets, the accumulation of material in the combustion chamber near area is reduced. Furthermore, it provides a homogeneous Tempe ¬ raturverteilung. Thus, the temperature-induced voltages can be significantly reduced.
Zweckmäßigerweise münden mehrere Bohrungen in die Kammer bzw. Kühllufttasche. Somit lässt sich der Kühleffekt in der Kammer bzw. der Kühllufttasche maximieren. Conveniently, several holes open into the chamber or cooling air pocket. Thus, the cooling effect in the chamber or the cooling air pocket can be maximized.
Typischerweise finden sich die höchsten thermischen Belastungen der Stirnplatte in ihrem radial äußeren und ihrem radial inneren Rand. Es ist daher vorteilhaft, wenn Bohrungen in diesen Bereichen angeordnet sind. Typically, the highest thermal loads of the face plate are found in its radially outer and radially inner edges. It is therefore advantageous if holes are arranged in these areas.
In einer weiteren vorteilhaften Ausführungsform der Erfindung mündet die Öffnung in eine längliche Vertiefung, die sich von der Brennkammer aus stromaufwärts im Rand der Stirnplatte er- streckt. Durch das Einbringen von Entlastungsschlitzen in thermisch beanspruchte Bereiche wird diese Komponente an hochbelasteten Stellen flexibler gemacht und kann so besser auf thermische Ausdehnungen reagieren, ohne dass die Span- nungswerte zu groß werden. Es ist daher besonders vorteil¬ haft, wenn die Vertiefung radial innen im inneren Rand angeordnet ist, weil dort die Spannungswerte des Bauteils am höchsten sind. Das Spülen mit Luft aus den Bohrungen dient der Vermeidung von Totgebieten in der Vertiefung, in denen die heiße Luft stehen bleibt. In a further advantageous embodiment of the invention, the opening opens into an elongated recess which extends from the combustion chamber upstream in the edge of the end plate. stretches. By introducing relief slots into areas subject to thermal stress, this component is made more flexible at heavily loaded areas and can thus respond better to thermal expansion without the voltage values becoming too great. It is particularly advantageous ¬ way, therefore, when the recess is disposed radially inside the inner edge, because there the voltage values of the component are the highest. Rinsing with air from the bores serves to avoid dead zones in the well where the hot air stops.
Damit die Stirnplatte weiterhin gegen die Brennkammer abdichtet, ist es zweckmäßig, wenn die Länge der Vertiefung kleiner als die Höhe des Randes ist. Thus, the face plate continues to seal against the combustion chamber, it is advantageous if the length of the recess is smaller than the height of the edge.
Ferner ist es im Hinblick darauf, dass mit diesen Maßnahmen Spannungen im Material verringert werden sollen sinnvoll, wenn der Grund der Vertiefung ein Querschnittsprofil aus der Menge Kreis, Oval, Ellipse aufweist, so dass Quellen für er- höhte Materialspannungen, wie z.B. Kanten, vermieden werden. Furthermore, in view of the fact that these measures are intended to reduce stresses in the material, it makes sense if the base of the depression has a cross-sectional profile of the set circle, oval, ellipse, so that sources of increased material tensions, such as e.g. Edges, to be avoided.
Vorteilhafter Weise münden die Öffnungen zweier Bohrungen derart in eine Vertiefung, dass gegenüberliegende Seiten der Vertiefung durch Prallkühlung gekühlt werden können. Advantageously, the openings of two holes open into a depression in such a way that opposite sides of the depression can be cooled by impingement cooling.
Schließlich ist es vorteilhaft, wenn in der Vertiefung weitere Öffnungen in Richtung des Ringraums angeordnet sind. Die weiteren Öffnungen können als Resonatoröffnungen verwendet werden. Durch diese zusätzlichen Resonatoren kann die Anzahl evtl. bereits vorhandener Resonatorbohrungen an der brenner- seitigen Stirnplatte verringert werden, wodurch der Abstand zwischen den Resonatorbohrungen vergrößert und somit die Spannungen zwischen den Resonatorbohrungen verringert werden. Die Fertigung derartiger Stirnplatten ist mit elektrochemischem Abtragen (ECM) , Funkenerodieren (EDM) und selektivem Laserschmelzen (SLM) möglich. Die genannten Ausführungsformen der Erfindung führen sowohl einzeln als auch in Kombination zur Reduzierung von Spannungsspitzen und somit zu einer erhöhten Lebensdauer der Stirnplatte. Durch die Kühlung mit Kühlluft an den Stellen hoher Temperaturbelastung wärmt sich die Stirnplatte bei transienten Vorgängen gleichmäßiger auf und auch im stationären Betrieb erfolgt eine homogenere Temperaturverteilung. Dies führt bei gleichen thermischen Bedingungen zu geringeren Temperaturbelastungen. Somit ermöglichen sie eine signifikan- te Lebenszeitverlängerung der Stirnplatte bei gleichen thermischen Randbedingungen. Somit vergrößert sich der Regelbereich im Betrieb und es ergeben auch im Hinblick auf Werkstoffe und Beschichtungen kostengünstigere Alternativen. Die Erfindung wird beispielhaft anhand der Zeichnungen näher erläutert. Es zeigen schematisch und nicht maßstäblich: Finally, it is advantageous if further openings are arranged in the direction of the annular space in the depression. The further openings can be used as resonator openings. By means of these additional resonators, the number of possibly existing resonator bores on the burner-side end plate can be reduced, whereby the distance between the resonator bores is increased and thus the voltages between the resonator bores are reduced. The production of such end plates is possible with electrochemical erosion (ECM), spark erosion (EDM) and selective laser melting (SLM). The mentioned embodiments of the invention lead, both individually and in combination, to the reduction of voltage peaks and thus to an increased service life of the front plate. By cooling with cooling air at the points of high temperature load, the face plate heats up evenly during transient processes and even in stationary operation, a more homogeneous temperature distribution. This leads to lower temperature loads under the same thermal conditions. Thus, they allow a significant lifetime extension of the face plate under the same thermal boundary conditions. Thus, the control range increases during operation and there are also cheaper alternatives with regard to materials and coatings. The invention will be explained in more detail by way of example with reference to the drawings. Shown schematically and not to scale:
Figur 1 eine schematische Schnittansicht einer Brenneran¬ ordnung, FIG. 1 shows a schematic sectional view of a burner arrangement ,
Figur 2 eine Stirnplatte mit axialen Bohrungen im Rand, FIG. 2 shows an end plate with axial bores in the edge,
Figur 3 eine Detailansicht der Stirnplatte,  FIG. 3 shows a detailed view of the front plate,
Figur 4 eine weitere Detailansicht der Stirnplatte,  FIG. 4 shows a further detail view of the front plate,
Figur 5 eine Schnittansicht der Bohrungen in der Stirnplatte, FIG. 5 shows a sectional view of the bores in the front plate,
Figur 6 eine Stirnplatte mit länglichen Vertiefungen, FIG. 6 shows a front plate with elongated depressions,
Figur 7 eine Darstellung der inneren Strukturen einer Stirnplatte, FIG. 7 shows a representation of the internal structures of a front plate,
Figur 8 eine Schnittansicht der länglichen Vertiefung und Figure 8 is a sectional view of the elongated recess and
Figur 9 eine Ansicht entlang der Achse der Vertiefung. Die Figuren zeigen eine Brenneranordnung 1 gemäß einer Ausführungsform der vorliegenden Erfindung bzw. Komponenten derselben. Die Brenneranordnung 1 der Figur 1 umfasst eine Figure 9 is a view along the axis of the recess. The figures show a burner assembly 1 according to an embodiment of the present invention or components thereof. The burner assembly 1 of Figure 1 comprises a
Brennkammer 2, einen zentral angeordneten Pilotbrenner 23, eine Mischrohranordnung 24 mit einer Vielzahl von Mischrohren 6, welche Mischkanäle 3 bilden, die in die Brennkammer 2 mün¬ den, eine Vielzahl von Brennstoffinj ektoren 25, die bis zu einer geeigneten Position in die Mischrohre 6 ragen, und eine Montageplatte 26, welche die Mischrohranordnung 24 aufnimmt und dazu dient, die Brenneranordnung 1 an einem nicht näher dargestellten Maschinengehäuse zu befestigen. Combustion chamber 2, a centrally arranged pilot burner 23, a mixing tube assembly 24 with a plurality of mixing tubes 6, which form mixing channels 3, the coins ¬ in the combustion chamber 2, the ¬ a plurality of Brennstoffinj 25, which up to a suitable position in the mixing tubes. 6 protrude, and a mounting plate 26 which receives the mixing tube assembly 24 and serves to fasten the burner assembly 1 to a machine housing, not shown.
Die Mischrohranordnung 24 umfasst eine rohrförmige Außenwand 8, eine radial von der Außenwand 8 beabstandet angeordnete rohrförmige Innenwand 9, eine stromaufwärts angeordnete ring¬ förmige Stirnplatte 10 und eine stromabwärts angeordnete Stirnplatte 11, die einen Ringraum 7 definieren, durch den sich die Mischrohre 6 in axialer Richtung erstrecken. The mixing tube assembly 24 includes a tubular outer wall 8, a radially spaced from the outer wall 8 arranged tubular inner wall 9, an upstream ring ¬ shaped end plate 10 and a downstream end plate 11, defining an annular space 7 through which the mixing tubes 6 in the axial Extend direction.
Die Stirnplatte 11 weist einen sowohl radial innen als auch radial außen sich in Richtung des Ringraums 7 erstreckenden umlaufenden Rand 13, 14 auf. Ferner umfasst die Mischrohranordnung 24 eine ringförmige Trennplatte 27. Die stromaufwärts angeordnete Stirnplatte 10 umfasst eineThe end plate 11 has a both radially inward and radially outward in the direction of the annular space 7 extending peripheral edge 13, 14. Further, the mixing tube assembly 24 includes an annular partition plate 27. The upstream face plate 10 includes a
Vielzahl von Durchgangsöffnungen 12, welche die Mischrohre 6 aufnehmen und/oder fortsetzen. Die Durchgangsöffnungen 12 definieren vorliegend zwei Lochkreise mit voneinander verschie¬ denen Lochkreisdurchmessern, wobei die Durchgangsöffnungen 12 des ersten Lochkreises und die Durchgangsöffnungen 12 des zweiten Lochkreises in radialer Richtung versetzt zueinander angeordnet sind. Ferner weist die Stirnplatte 10 eine Viel¬ zahl von in der Figur 1 nicht gezeigten Luftkanälen auf, die sich in axialer Richtung erstrecken und über die Ringfläche der Stirnplatte 10 verteilt angeordnet sind. Variety of through holes 12 which receive the mixing tubes 6 and / or continue. The passage openings 12 define in the present case two bolt holes with mutually different bolt circle diameters, wherein the passage openings 12 of the first bolt circle and the through holes 12 of the second bolt circle are offset in the radial direction from each other. Furthermore, the end plate 10 has a multiplicity of numbers of air channels, not shown in FIG. 1, which extend in the axial direction and are distributed over the annular surface of the front plate 10.
Die Trennplatte 27 ist analog zur Stirnplatte 10 mit Durch¬ gangsöffnungen 28 versehen, die mit den Durchgangsöffnungen 12 der Stirnplatte 10 in axialer Richtung fluchten. Ferner ist die Trennplatte 27 mit einer Vielzahl von Spülluftkanälen 29 versehen, die verteilt über die Ringfläche der Trennplatte 27 angeordnet sind. The partition plate 27 is analogous to the face plate 10 provided with through ¬ holes 28 which are aligned with the through holes 12 of the end plate 10 in the axial direction. Further, the partition plate 27 is provided with a plurality of scavenging air channels 29 distributed over the annular surface of the partition plate 27.
Die stromabwärts angeordnete Stirnplatte 11 umfasst analog zu der Stirnplatte 10 und der Trennplatte 27 Durchgangsöffnungen 12, die axial mit den Durchgangsöffnungen 12 der Stirnplatte 10 und den Durchgangsöffnungen 28 der Trennplatte 27 fluchten. Ferner sind in der Stirnplatte 11 sich axial erstrecken- de Luftkanäle 30 ausgebildet, die den Ringraum 7 mit der Brennkammer 2 strömungstechnisch verbinden. The downstream arranged face plate 11 comprises analogous to the end plate 10 and the partition plate 27 through holes 12 which are aligned axially with the through holes 12 of the end plate 10 and the through holes 28 of the partition plate 27. Furthermore, axially extending in the front plate 11 de air ducts 30 formed, which connect the annular space 7 with the combustion chamber 2 fluidly.
Im Betrieb strömen ein Brennstoff 5 und Verbrennungsluft 4 durch die Strahldüsen, d.h. die Mischrohre 6, und gelangen als Brennstoff-Luft-Gemisch in die Brennkammer 2. In operation, a fuel 5 and combustion air 4 flow through the jet nozzles, i. the mixing tubes 6, and arrive as a fuel-air mixture in the combustion chamber. 2
Figur 2 zeigt die stromabwärts angeordnete ringförmige Stirn¬ platte 11 mit Durchgangsöffnungen 12 und axialen Bohrungen 15 im Rand 13, 14 sowohl radial innen als auch radial außen. Die Bohrungen 15 erstrecken sich im Wesentlichen parallel zu einer Normalen der Stirnplatte 11 vom Ringraum 7 her in die Stirnplatte 11 hinein. In Figur 3 ist zu sehen, dass mindestens eine von der axialen Bohrung 15 abzweigende Öffnung 16 zur Abfuhr von Kühlluft 17 vorgesehen ist. Figure 2 shows the downstream annular end ¬ plate 11 with through holes 12 and axial holes 15 in the edge 13, 14 both radially inward and radially outward. The bores 15 extend substantially parallel to a normal of the end plate 11 from the annular space 7 into the end plate 11. It can be seen in FIG. 3 that at least one opening 16 branched off from the axial bore 15 is provided for the removal of cooling air 17.
In Figur 4 ist zu sehen, wie mehrere Bohrungen 15 in die Kam- mer 18 münden. Figur 5 zeigt dasselbe noch einmal unter einem anderen Winkel und im Schnitt. Die Kammern 18 oder auch Kühllufttaschen können aus einer Kombination aus Bohrungen und Ausfräsungen bestehen oder durch andere Fertigungsverfahren hergestellt werden. Insbesondere die Platzierung an den Stel- len hoher Temperatur an der inneren Zylinderfläche und der äußeren Zylinderfläche der Stirnplatte führen zu einer besse¬ ren Temperaturverteilung und somit geringeren temperaturinduzierten Spannungen. Figur 6 zeigt eine Ausführungsform der Erfindung mit länglichen Vertiefungen 19, die sich von der Brennkammer 2 aus stromaufwärts im Rand 13 der Stirnplatte 11 erstrecken. Die Vertiefungen sind radial innen im inneren Rand 13 angeordnet. Ihre Länge ist kleiner als die Höhe des Randes 13. FIG. 4 shows how a plurality of bores 15 open into the chamber 18. Figure 5 shows the same again at a different angle and in section. The chambers 18 or cooling air pockets may consist of a combination of holes and cutouts or be made by other manufacturing processes. In particular, the placement of the STEL len high temperature at the inner cylindrical surface and the outer cylindrical surface of the end plate lead to a Besse ¬ ren temperature distribution and thus lower temperature-induced stresses. FIG. 6 shows an embodiment of the invention with elongate depressions 19 which extend from the combustion chamber 2 upstream in the edge 13 of the end plate 11. The depressions are arranged radially inward in the inner edge 13. Its length is smaller than the height of the edge 13th
In Figur 7 sind die Strukturen im Inneren des Rands 13 der Stirnplatte 11 gezeigt. Im Ausführungsbeispiel sind je zwei Bohrungen 15 einer Vertiefung 19 zugeordnet. Die Bohrungen 15 weisen Öffnungen 16 zur Abfuhr von Kühlluft 17 auf. Diese Kühlluft 17 strömt durch Kanäle 31 zur Vertiefung 19. Die Öffnungen 16 bzw. die Kanäle 31 sind so angeordnet, dass ge¬ genüberliegende Seiten 21 der Vertiefung 19 durch Prallküh- lung gekühlt werden können. Figur 7 zeigt auch, dass der Grund 20 der Vertiefung 19 ein Querschnittsprofil aus der Menge Kreis, Oval, Ellipse aufweist. Ferner ist in der Figur 7 zu sehen, dass in der Vertiefung 19 weitere Öffnungen 22 in Richtung des Ringraums 7 angeordnet sind. FIG. 7 shows the structures in the interior of the edge 13 of the end plate 11. In the exemplary embodiment, two holes 15 are assigned to a recess 19. The holes 15 have openings 16 for the removal of cooling air 17. This cooling air flow 17 through passages 31 to 19. The recess holes 16 and the channels 31 are arranged so that ge ¬ genüberliegende sides of the recess 21 may be cooled by Prallküh- lung 19th FIG. 7 also shows that the base 20 of the depression 19 has a cross-sectional profile of the set circle, oval, ellipse. Furthermore, it can be seen in FIG. 7 that further openings 22 are arranged in the direction of the annular space 7 in the depression 19.
Figur 8 zeigt eine Ansicht desselben Ausführungsbeispiels mit Schnitt durch eine Vertiefung 19. Darin erkennt man den runden Grund 20 der Vertiefung 19 sowie die Kanäle 31, die von den Öffnungen 16 der Bohrungen 15 kommend in die Vertiefung 19 münden, sowie weiteren Öffnungen 22, welche von den Vertiefungen 19 ausgehend in den Ringraum 7 münden. FIG. 8 shows a view of the same exemplary embodiment with a section through a depression 19. It shows the round base 20 of the recess 19 and the channels 31 which open into the depression 19 coming from the openings 16 of the bores 15, as well as further openings 22 starting from the depressions 19, starting in the annular space 7.
Figur 9 zeigt den Blick von der Brennkammerseite auf den Rand 13 in eine Vertiefung entlang ihrer Längsachse. Man erkennt die Auslässe der Kanäle 31. Figure 9 shows the view from the combustion chamber side on the edge 13 in a recess along its longitudinal axis. One recognizes the outlets of the channels 31.
Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele einge- schränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen . Although the invention has been further illustrated and described in detail by the preferred embodiment, the invention is not limited to the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims

Patentansprüche claims
1. Brenneranordnung (1) mit einer Brennkammer (2), einer Vielzahl von in die Brennkammer (2) mündenden Mischkanä- len (3) , in denen während des bestimmungsgemäßen Betriebs eingeleitete Verbrennungsluft (4) und eingeleiteter Brennstoff (5) gemischt werden, wobei die Mischkanäle (3) durch Mischrohre (6) gebildet sind, die sich axial durch einen Ringraum (7) erstrecken, der zwischen einer rohr- förmigen Außenwand (8), einer radial von der AußenwandA burner arrangement (1) having a combustion chamber (2), a multiplicity of mixing ducts (3) opening into the combustion chamber (2), in which combustion air (4) and fuel (5) introduced during normal operation are mixed, wherein the mixing channels (3) are formed by mixing tubes (6) extending axially through an annular space (7) formed between a tubular outer wall (8) and radially from the outer wall
(8) beabstandet angeordneten rohrförmigen Innenwand (9), einer stromaufwärts angeordneten ringförmigen Stirnplatte(8) spaced tubular inner wall (9), an upstream annular end plate
(10) und einer stromabwärts angeordneten ringförmigen Stirnplatte (11) definiert ist, wobei die Stirnplatten (10, 11) mit Durchgangsöffnungen (12) versehen sind, welche die Mischrohre (6) aufnehmen und/oder fortsetzen und sowohl radial innen als auch radial außen einen sich in Richtung des Ringraums (7) erstreckenden umlaufenden Rand (13, 14) aufweisen, dadurch gekennzeichnet, dass in der stromabwärts angeordneten ringförmigen Stirnplatte (11) axiale Bohrungen (15) im Rand (13, 14) vorgesehen sind, die sich im Wesentlichen parallel zu einer Normalen der Stirnplatte (11) vom Ringraum (7) her in die Stirnplatte(10) and a downstream annular end plate (11) is defined, wherein the end plates (10, 11) are provided with through holes (12) which receive and / or continue the mixing tubes (6) and both radially inward and radially outward a circumferential edge (13, 14) extending in the direction of the annular space (7), characterized in that axial bores (15) are provided in the edge (13, 14) in the downstream annular end plate (11) Substantially parallel to a normal of the end plate (11) from the annular space (7) forth in the face plate
(11) hinein erstrecken und dass mindestens eine von der axialen Bohrung (15) abzweigende Öffnung (16) zur Abfuhr von Kühlluft (17) vorgesehen ist. (11) extend into and that at least one of the axial bore (15) branching off opening (16) for discharging cooling air (17) is provided.
2. Brenneranordnung (1) nach Anspruch 1, wobei die mindestens eine Öffnung (16) in eine Kammer (18) mündet, welche zum Ringraum (7) hin geöffnet ist. 2. burner assembly (1) according to claim 1, wherein the at least one opening (16) opens into a chamber (18) which is open to the annular space (7).
3. Brenneranordnung (1) nach Anspruch 2, wobei mehrere Bohrungen (15) in die Kammer (18) münden. 3. burner assembly (1) according to claim 2, wherein a plurality of bores (15) open into the chamber (18).
4. Brenneranordnung (1) nach einem der vorhergehenden Ansprüche, wobei die Bohrungen (15) sowohl im radial äuße¬ ren als auch im radial inneren Rand (14, 13) der Stirnplatte (11) angeordnet sind. 4. burner assembly (1) according to one of the preceding claims, wherein the bores (15) both in the radially äuße ¬ ren and in the radially inner edge (14, 13) of the end plate (11) are arranged.
5. Brenneranordnung (1) nach Anspruch 1, wobei die Öffnung (15) in eine längliche Vertiefung (19) mündet, die sich von der Brennkammer (2) aus stromaufwärts im Rand (13) der Stirnplatte (11) erstreckt. 5. Burner assembly (1) according to claim 1, wherein the opening (15) opens into an elongated recess (19) extending from the combustion chamber (2) upstream in the edge (13) of the end plate (11).
6. Brenneranordnung (1) nach Anspruch 5, wobei die Vertiefung (19) radial innen im inneren Rand (13) angeordnet ist . 6. burner assembly (1) according to claim 5, wherein the recess (19) is arranged radially inwardly in the inner edge (13).
7. Brenneranordnung (1) nach einem der Ansprüche 5 oder 6, wobei die Länge der Vertiefung (19) kleiner als die Höhe des Randes (13) ist. 7. burner assembly (1) according to any one of claims 5 or 6, wherein the length of the recess (19) is smaller than the height of the edge (13).
8. Brenneranordnung (1) nach einem der Ansprüche 5 bis 7, wobei der Grund (20) der Vertiefung (19) ein Querschnittsprofil aus der Menge Kreis, Oval, Ellipse auf¬ weist. 8. burner assembly (1) according to one of claims 5 to 7, wherein the base (20) of the recess (19) has a cross-sectional profile of the set circle, oval, ellipse ¬ .
9. Brenneranordnung (1) nach einem der Ansprüche 5 bis 8, wobei die Öffnungen (16) zweier Bohrungen (15) derart in eine Vertiefung (19) münden, dass gegenüberliegende Sei¬ ten (21) der Vertiefung (19) durch Prallkühlung gekühlt werden können. 9. burner assembly (1) according to one of claims 5 to 8, wherein the openings (16) of two holes (15) open into a recess (19), that opposite Sei ¬ th (21) of the recess (19) cooled by impingement cooling can be.
10. Brenneranordnung (1) nach einem der Ansprüche 5 bis 9, wobei in der Vertiefung (19) weitere Öffnungen (22) in Richtung des Ringraums (7) angeordnet sind. 10. burner assembly (1) according to one of claims 5 to 9, wherein in the recess (19) further openings (22) in the direction of the annular space (7) are arranged.
EP15788377.8A 2014-11-03 2015-10-29 Burner assembly Active EP3134682B1 (en)

Applications Claiming Priority (2)

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DE102014222402 2014-11-03
PCT/EP2015/075053 WO2016071186A1 (en) 2014-11-03 2015-10-29 Burner assembly

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CN106461226B (en) 2019-06-28
RU2656177C1 (en) 2018-05-31
US20170227223A1 (en) 2017-08-10
WO2016071186A1 (en) 2016-05-12
EP3134682B1 (en) 2018-08-22
US10578305B2 (en) 2020-03-03
CN106461226A (en) 2017-02-22

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