EP2160542B1 - Fixation en trois points d'électrodes d'allumage d'un brûleur - Google Patents

Fixation en trois points d'électrodes d'allumage d'un brûleur Download PDF

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Publication number
EP2160542B1
EP2160542B1 EP08785889A EP08785889A EP2160542B1 EP 2160542 B1 EP2160542 B1 EP 2160542B1 EP 08785889 A EP08785889 A EP 08785889A EP 08785889 A EP08785889 A EP 08785889A EP 2160542 B1 EP2160542 B1 EP 2160542B1
Authority
EP
European Patent Office
Prior art keywords
burner
ignition electrodes
ignition
holder
accordance
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.)
Active
Application number
EP08785889A
Other languages
German (de)
English (en)
Other versions
EP2160542A1 (fr
Inventor
Christian Hohmann
Andre Kluge
Roland Liebe
Elmar Pfeiffer
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 EP08785889A priority Critical patent/EP2160542B1/fr
Publication of EP2160542A1 publication Critical patent/EP2160542A1/fr
Application granted granted Critical
Publication of EP2160542B1 publication Critical patent/EP2160542B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/008—Structurally associated with fluid-fuel burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/006—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2207/00—Ignition devices associated with burner

Definitions

  • the so-called burner On the side facing away from the turbine of the combustion chamber is typically the so-called burner. This serves to ignite the fuel or the fuel-air mixture and is equipped for this purpose with ignition electrodes.
  • the fuel and air are injected through openings of the burner into the combustion chamber.
  • the ignition electrodes are arranged in the vicinity of these openings and ignite the passing gas there.
  • a spark is generated by applying an ignition voltage between two ignition electrodes. This spark is present during the entire ignition duration. In order to achieve an optimal spark, the exact observance of a certain distance of the tips of the ignition electrodes is required.
  • the ignition electrodes are often attached by means of a clamp on the outer surface of the burner.
  • the ignition electrodes are clamped in the clamp with the aid of a centrally located between the ignition electrodes screw.
  • the contact surfaces of the ignition electrodes are at their full extent on the clamp, which may for example have a round cross-section of.
  • the ignition electrodes are usually encased with a ceramic.
  • the ceramic sheath serves the electrical insulation of the ignition electrodes and thus reduces their thermal expansion.
  • Such an attachment is from the Scriptures DE 9 211 464 U known. Fluctuations in the surface quality of the ceramic and inaccuracies in the shape and position of the clamp can cause the ignition electrodes can not be properly attached.
  • the attachment is either too tight or too loose. In the case of too strong attachment, the thermal expansion of the ignition electrode is prevented and in the case of loose fastening occur unwanted vibrations of the ignition electrodes.
  • the burner according to the invention comprises two ignition electrodes and a holder, wherein the holder is arranged on the outer surface of the burner.
  • the burner is characterized in that the ignition electrodes are held at three points of their circumference by the holder in a fixed position.
  • This three-point fixation which may also be a three-line fixation because of the axial extent of the holder, a statically optimal fixation is ensured.
  • the three fixing points or the three fixing lines can optimally be distributed over the circumference of the ignition electrodes such that the angles between them are 120 °.
  • each ignition electrode may have a ceramic jacket.
  • the ceramic jacket serves to electrically insulate the ignition electrode.
  • the holder according to the invention with a three-point fixation offers the advantage that it can easily compensate for possible deviations in the surface quality of the ceramic without this impairing the static fixation of the ignition electrodes.
  • the ignition electrodes can each be mounted radially resiliently in the holder.
  • This can be realized in particular in that the holder comprises at least one radially resilient clamp.
  • the radial suspension allows the Compensation of vibrations, which increases the life of the ignition electrode.
  • the three-point fixation according to the invention makes it possible to compensate for possible dimensional inaccuracies in clamp production.
  • the holder comprises a support bracket and a fixing clamp.
  • the three-point fixation according to the invention can be achieved in that the support bracket and the fixing clamp are configured and arranged relative to each other, that each ignition electrode at one point of its circumference through the support bracket and at two other points of its circumference through the fixing clamp held in a fixed position.
  • the fixing clamp is further configured so that it allows a spring action and beyond by their clamping force allows the necessary for the compensation of the thermal expansion axial displacement.
  • FIG. 1 shows a burner 3 for a gas turbine with a flange 5, a burner support in the form of a tube 37, a Swirler 38, which is also called Axialgitter, and a nozzle 39 which surrounds the Swirler 38 concentrically. Furthermore, the burner ignition electrodes 4 and a holder 2.
  • the holder 2 comprises a clamp 7 and a screw 10.
  • the tube 37 is adjacent to a flange 5. Both elements are slightly eccentric to each other.
  • the ignition electrodes 4 are fixed with a holder 2.
  • the ignition electrodes 4 are substantially parallel to each other.
  • air is supplied to the swirler 38 and swirled by the blades of the swirler 38.
  • the swirler 38 is supplied with fuel through the interior of the tube 37.
  • the fuel is ignited by a spark, which is formed between the two ignition electrodes 4.
  • a flame is formed which is carried into the combustion chamber (not shown) and burns the air-fuel mixture.
  • the resulting high pressure hot gas is supplied to the turbine.
  • FIG. 2 shows the section of the in the FIG. 1 shown burner 3, in which the holder 2 is located. You can see in FIG. 2 a part of the tube 37, two ignition electrodes 4 and the holder 2, which fixes the ignition electrodes 4 to the tube 37.
  • the ignition electrodes 4 are provided with a ceramic sheath 6 in the region in which the holder 2 is located. They are essentially parallel to one another.
  • the holder 2 consists of a clamp 7 which is fastened by means of a screw 10 to the tube 37.
  • the direction of rotation of the screw 10 is indicated by an arrow 12.
  • the rotation of the clamp 7 is indicated by arrows 13.
  • the twisting of the clamp 7 can lead to bending or twisting of the ignition electrodes 4. This is indicated by arrows 18.
  • the bending or twisting of the ignition electrodes 4 can lead to a change in the distance between the ignition electrodes 4 and possibly also to a breakage of the ignition electrodes 4. This is avoided by a burner according to the invention.
  • FIG. 4 shows the holder according to the invention in a sectional view along the radial direction of the tube 37. It can be seen in FIG. 4 the part of the tube 37 in which the holder 2 is located. It can be seen the two clamps, which form a flat support bracket 8 and a curved fixing clamp 9, which are fixed by means of spacers 15 and screws 10 to the tube 37. Between the support bracket 8 and the fixing clamp 9 two ignition electrodes 4 are fixed parallel to each other. The ignition electrodes 4 have in the region of the holder 2 on a ceramic sheath 6.
  • the support bracket 8 is located between the tube 37 and the ignition electrodes 4 and their ceramic sheath 6. On the flat support bracket 8 are the ignition electrodes 4 on each support point 1 on. At the support bracket 8 opposite side of the ignition electrodes 4 is the fixing clamp 9, which fixes the ignition electrodes 4 at a certain distance from each other.
  • the fixing clamp 9 has bulges in each case in the region of an ignition electrode, which, however, do not have a circular cross-sectional profile but an approximately sinusoidal cross-sectional profile. As a result, they do not lie with the entire bulge at the respective ignition electrode 4, but only at two points 1, as in FIG. 4 can be seen. Other than sinusoidal cross sections of the bulges, such as triangular cross-sectional profiles would lead to the same result.
  • the ignition electrodes 4 are mounted between the support bracket 8 and the fixing clamp 9 in such a way that they contact the support bracket 8 at two points or lines, their circumference, the fixing clamp 9 and at a third point or a third line ,
  • These fixing points 1 of a ignition electrode 4 are preferably offset at their circumference at an angle of 120 ° to each other. Other angles of the fixing points 1 to each other are possible as long as a static fixation of the ignition electrodes 4 is ensured.
  • the fixing clamp 9 is characterized in the present embodiment in that it has a total of resilient properties.
  • the spring effect is characterized by an arrow 14, which indicates the possible movement of the fixing clamp 9 in the radial direction.
  • an axial displacement of the ignition electrodes 4 is ensured. This is indicated by an arrow 11 ( FIG. 3 ).
  • the axial displaceability allows compensation of the thermal expansion of the ignition electrodes 4 as a result of the heat generated during operation of the burner.
  • each ignition electrode 4 is supported by the support bracket 8 and the fixing clamp 9 radially resiliently in the holder. This allows a compensation of the radial thermal expansion of the ignition electrodes 4 occurring as a result of the heat and a recording of possibly occurring oscillations of the ignition electrodes 4.
  • only the fixing clamp 9 is designed to be radially resilient.
  • the support bracket 8 and the fixing clamp 9 are screwed by means of two screws 10 to the tube 37.
  • the screws 10 are arranged so that the ignition electrodes 4 are located between them.
  • the use of two screws 10 prevents the fixation clamp 9 and / or the support clamp 8 from twisting when fastening the fixation clamp 9 and the support clamp 8 to the tube 37.
  • more than two screws can be used.
  • FIG. 6 the holder 2 according to the invention is shown in a sectional view. You can see the two ignition electrodes 4, which are surrounded by a ceramic sheath 6 and rest on the support bracket 8. The ignition electrodes 4 are held in place by the fixing clamp 9 from above. The screws 10 used for fastening are located in the middle between the two ignition electrodes 4.
  • the fixing clamp 9 is bent in the region of the ignition electrodes 4 in such a way that it touches the ignition electrodes 4 at two points 1 of the circumference of the ignition electrodes 4.
  • the fixing clamp 9 has resilient properties in the region of its bends. The possible in consequence of the suspension movement of the fixing clamp 9 is exemplified by arrows 14. Due to the suspension of the fixing clamp 9, natural vibrations of the ignition electrodes 4 can be absorbed by the fixing clamp 9.
  • the holder 2 described in this embodiment has the same advantages as the holder 2 described in the first embodiment.
  • the resilient three-point fixation according to the invention enables a stable attachment of ignition electrodes to the outside of a burner, which permits axial and radial expansions and absorbs vibrations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Gas Burners (AREA)
  • Spark Plugs (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Claims (11)

  1. Brûleur ( 3 ) comprenant deux électrodes ( 4 ) d'allumage et une fixation ( 2 ), la fixation ( 2 ) étant disposée sur la surface extérieure du brûleur ( 3 ),
    caractérisé en ce que
    les électrodes ( 4 ) d'allumage sont maintenues par la fixation ( 2 ) en une position fixée en respectivement trois points ( 1 ) de leur pourtour.
  2. Brûleur ( 3 ) suivant la revendication 1,
    caractérisé en ce que
    les trois points sont répartis sur le pourtour de l'électrode d'allumage de manière à former entre eux l'angle de 120°.
  3. Brûleur ( 3 ) suivant la revendication 1 ou 2,
    caractérisé en ce que
    les électrodes ( 4 ) d'allumage sont montées coulissantes axialement dans la fixation ( 2 ).
  4. Brûleur ( 3 ) suivant l'une des revendications 1 à 3,
    caractérisé en ce que
    chaque électrode ( 4 ) d'allumage a une gaine ( 6 ) en céramique.
  5. Brûleur ( 3 ) suivant l'une des revendications 1 à 4,
    caractérisé en ce que
    chaque électrode ( 4 ) d'allumage est montée de manière élastique radialement dans la fixation ( 2 ).
  6. Brûleur ( 3 ) suivant l'une des revendications 1 à 5,
    caractérisé en ce que
    la fixation ( 2 ) comprend au moins un collier ( 9 ) élastique radialement.
  7. Brûleur ( 3 ) suivant l'une des revendications 1 à 6,
    caractérisé en ce que
    la fixation ( 2 ) comprend un collier ( 8 ) d'appui et un collier ( 9 ) d'immobilisation.
  8. Brûleur ( 3 ) suivant la revendication 7,
    caractérisé en ce que
    le collier ( 8 ) d'appui et le collier ( 9 ) d'immobilisation sont conformés et disposés l'un par rapport à l'autre de manière à ce que chaque électrode ( 4 ) d'allumage soit maintenue en une position fixée en un point ( 1 ) de son pourtour par le collier ( 8 ) d'appui et en deux autres points ( 1 ) de son pourtour par le collier ( 9 ) d'immobilisation.
  9. Brûleur ( 3 ) suivant l'une des revendications 1 à 8,
    caractérisé en ce que
    la fixation ( 2 ) est fixée à la surface extérieure du brûleur ( 3 ) à l'aide d'au moins deux éléments de fixation.
  10. Brûleur ( 3 ) suivant la revendication 9,
    caractérisé en ce que
    les éléments de fixation sont des vis ( 10 ).
  11. Turbine à gaz comprenant un brûleur ( 3 ) suivant l'une des revendications 1 à 10.
EP08785889A 2007-07-03 2008-06-30 Fixation en trois points d'électrodes d'allumage d'un brûleur Active EP2160542B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08785889A EP2160542B1 (fr) 2007-07-03 2008-06-30 Fixation en trois points d'électrodes d'allumage d'un brûleur

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07013006A EP2012060A1 (fr) 2007-07-03 2007-07-03 Fixation à trois points d'électrodes d'allumage d'un brûleur
PCT/EP2008/058353 WO2009003973A1 (fr) 2007-07-03 2008-06-30 Fixation en trois points d'électrodes d'allumage d'un brûleur
EP08785889A EP2160542B1 (fr) 2007-07-03 2008-06-30 Fixation en trois points d'électrodes d'allumage d'un brûleur

Publications (2)

Publication Number Publication Date
EP2160542A1 EP2160542A1 (fr) 2010-03-10
EP2160542B1 true EP2160542B1 (fr) 2012-02-22

Family

ID=38926192

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07013006A Withdrawn EP2012060A1 (fr) 2007-07-03 2007-07-03 Fixation à trois points d'électrodes d'allumage d'un brûleur
EP08785889A Active EP2160542B1 (fr) 2007-07-03 2008-06-30 Fixation en trois points d'électrodes d'allumage d'un brûleur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07013006A Withdrawn EP2012060A1 (fr) 2007-07-03 2007-07-03 Fixation à trois points d'électrodes d'allumage d'un brûleur

Country Status (11)

Country Link
US (1) US8590285B2 (fr)
EP (2) EP2012060A1 (fr)
JP (1) JP4833354B2 (fr)
KR (1) KR101493248B1 (fr)
CN (1) CN101652608B (fr)
AT (1) ATE546693T1 (fr)
DK (1) DK2160542T3 (fr)
ES (1) ES2379138T3 (fr)
PT (1) PT2160542E (fr)
RU (1) RU2457399C2 (fr)
WO (1) WO2009003973A1 (fr)

Families Citing this family (7)

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KR20140091672A (ko) * 2011-10-17 2014-07-22 볼보 컨스트럭션 이큅먼트 에이비 건설기계의 유압배관 고정장치
GB201611801D0 (en) 2016-07-07 2016-08-17 Rolls Royce Plc A mounting bracket
DE102017210590B4 (de) 2017-06-23 2019-03-28 Convotherm Elektrogeräte GmbH Verbindungsvorrichtung für eine Elektrode
RU180424U1 (ru) * 2017-09-12 2018-06-13 Общество с ограниченной ответственностью "Газпром добыча Ноябрьск" Устройство для дистанционного розжига углеводородных газов на факеле
FR3077097B1 (fr) * 2018-01-22 2020-08-07 Safran Aircraft Engines Dispositif de refroidissement pour une turbine d'une turbomachine
US10364704B1 (en) * 2018-03-29 2019-07-30 Rohr, Inc. Positioning bodies relative to one another using spring element(s) and an elastomeric body
US11002153B2 (en) 2018-07-10 2021-05-11 Raytheon Technologies Corporation Balance bracket

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Also Published As

Publication number Publication date
JP2010532442A (ja) 2010-10-07
ES2379138T3 (es) 2012-04-23
EP2012060A1 (fr) 2009-01-07
ATE546693T1 (de) 2012-03-15
KR20100047240A (ko) 2010-05-07
PT2160542E (pt) 2012-03-09
RU2010103446A (ru) 2011-08-10
US8590285B2 (en) 2013-11-26
DK2160542T3 (da) 2012-06-18
CN101652608A (zh) 2010-02-17
CN101652608B (zh) 2011-09-21
EP2160542A1 (fr) 2010-03-10
US20100281848A1 (en) 2010-11-11
KR101493248B1 (ko) 2015-02-16
WO2009003973A1 (fr) 2009-01-08
RU2457399C2 (ru) 2012-07-27
JP4833354B2 (ja) 2011-12-07

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