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EP2012060A1 - Fixation à trois points d'électrodes d'allumage d'un brûleur - Google Patents

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

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Publication number
EP2012060A1
EP2012060A1 EP07013006A EP07013006A EP2012060A1 EP 2012060 A1 EP2012060 A1 EP 2012060A1 EP 07013006 A EP07013006 A EP 07013006A EP 07013006 A EP07013006 A EP 07013006A EP 2012060 A1 EP2012060 A1 EP 2012060A1
Authority
EP
European Patent Office
Prior art keywords
burner
holder
ignition electrodes
ignition
electrodes
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Withdrawn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
EP07013006A
Other languages
German (de)
English (en)
Inventor
Christian Dr. Hohmann
Andre Kluge
Roland Dr. 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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to EP07013006A priority Critical patent/EP2012060A1/fr
Priority to EP08785889A priority patent/EP2160542B1/fr
Priority to JP2010513953A priority patent/JP4833354B2/ja
Priority to DK08785889.0T priority patent/DK2160542T3/da
Priority to KR1020107002211A priority patent/KR101493248B1/ko
Priority to AT08785889T priority patent/ATE546693T1/de
Priority to RU2010103446/06A priority patent/RU2457399C2/ru
Priority to PCT/EP2008/058353 priority patent/WO2009003973A1/fr
Priority to ES08785889T priority patent/ES2379138T3/es
Priority to CN2008800115898A priority patent/CN101652608B/zh
Priority to PT08785889T priority patent/PT2160542E/pt
Priority to US12/665,389 priority patent/US8590285B2/en
Publication of EP2012060A1 publication Critical patent/EP2012060A1/fr
Withdrawn legal-status Critical Current

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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 present invention relates to the attachment of ignition electrodes to a burner of a gas turbine.
  • An important component of a gas turbine is, among other things, the so-called combustion chamber, in which fuel is burned with the aid of an oxidizer.
  • the oxidizer is typically air. The resulting during combustion in the combustion chamber hot gas is forwarded to a turbine.
  • 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. 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 ignition electrodes are not arranged centrally between a so-called diagonal grid and a burner carrier, since the clamps used for the attachment of the ignition electrodes are often screwed to a cam, which has a certain height because of the minimum depth of engagement.
  • the distance to the diagonal grid is thus small and it can come to the spark skip in this area, provided that the distance at this point is smaller than at the so-called spark gap at which the spark is to be generated. The consequence of this is that the affected burner can no longer be fired directly.
  • 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 °.
  • the ignition electrodes can be axially displaceably mounted in the holder, which can be realized for example by a resilient configuration of the holder. Such an axial displacement of the ignition electrodes can be caused by a thermal expansion of the ignition electrodes. Due to the axially displaceable mounting axial thermal stresses in the ignition electrode can be avoided. At the same time, the ignition electrodes can be fixed radially securely, so that possible problems resulting from lack of distance fidelity of the ignition electrodes can be avoided.
  • 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 fixing 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 a point of its circumference by the support bracket and at two other points of its circumference by 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.
  • the use of only one support bracket and a fixing clamp for holding two ignition electrodes has the advantage that with the help of a very small number of components optimum attachment of the ignition electrodes is achieved. This arrangement also allows easy mounting and interchangeability of the ignition electrodes.
  • the holder according to the invention can be fastened in any way to the outer surface of the burner.
  • the holder is fastened by means of at least two fastening elements on the outer surface of the burner.
  • These fastening elements may in particular be releasable fastening means, for example screws.
  • the use of at least two fasteners, especially screws has the advantage that when fixing the fixing clamp is not rotated against the support bracket.
  • it does not come with the use of at least two fasteners to an uneven distributed holding force, as well as for bending the ignition electrodes. A bending of the ignition electrodes is undesirable because it can cause an enlargement of the spark gap and can result in the breakage of the ignition electrodes.
  • the burner according to the invention may in particular be the burner of a gas turbine.
  • the burner according to the invention can be reduced by the possible flat design of the holder according to the invention, the distance of the ignition electrodes to the burner carrier to which they are attached, compared to other known brackets.
  • the distance to a diagonal grid located near the burner is simultaneously increased and a sparkover to the diagonal grid is avoided.
  • a uniform spacing of the ignition electrodes to the diagonal grid and to the burner carrier is ensured by the holder according to the invention.
  • the possible by the holder according to the invention flat configuration of the same provides better protection of the ignition electrodes during installation and removal, since the distance is increased to the diagonal grid.
  • the burner according to the invention prevents misfiring in the diagonal grid. In addition, it reduces the risk of damage to the ignition electrodes during installation and removal of the same.
  • 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. 3 shows the holder according to the invention in a perspective view. You can see in FIG. 3 a section of the burner carrier or the tube 37, on which the holder 2 is located.
  • the holder 2 fixes two ignition electrodes 4 by means of two screws 10 and two clamps 8, 9 on the tube 37. In the region of the holder 2, the ignition electrodes 4 are provided with a ceramic sheath 6.
  • the ignition electrodes 4 are substantially parallel to each other.
  • 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 an ignition electrode 4 are preferably offset at the periphery thereof 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. 5 schematically shows a plan view of the inventive holder 2. It can be seen in the FIG. 5 two mutually parallel ignition electrodes, which are provided in the region of the holder 2 with a ceramic sheath 6.
  • the holder 2 comprises inter alia a fixing clamp 9 and two screws 10.
  • the screws 10 are arranged so that they are between the two Ignition electrodes 4 are located. Also in this case, a twisting of the fixing clamp 9 is prevented by means of the two screws 10. Basically, it is possible to use more than two screws for fixation.
  • 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)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Spark Plugs (AREA)
EP07013006A 2007-07-03 2007-07-03 Fixation à trois points d'électrodes d'allumage d'un brûleur Withdrawn EP2012060A1 (fr)

Priority Applications (12)

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
EP08785889A EP2160542B1 (fr) 2007-07-03 2008-06-30 Fixation en trois points d'électrodes d'allumage d'un brûleur
JP2010513953A JP4833354B2 (ja) 2007-07-03 2008-06-30 バーナの点火電極棒の三点支持固定装置
DK08785889.0T DK2160542T3 (da) 2007-07-03 2008-06-30 Trepunktsfastgøring af tændelektroder til en brænder
KR1020107002211A KR101493248B1 (ko) 2007-07-03 2008-06-30 버너의 점화 전극들에 대한 3개의 지점 고정 배열
AT08785889T ATE546693T1 (de) 2007-07-03 2008-06-30 Drei-punkt-fixierung von zündelektroden eines brenners
RU2010103446/06A RU2457399C2 (ru) 2007-07-03 2008-06-30 Фиксация в трех точках поджигающих электродов горелки
PCT/EP2008/058353 WO2009003973A1 (fr) 2007-07-03 2008-06-30 Fixation en trois points d'électrodes d'allumage d'un brûleur
ES08785889T ES2379138T3 (es) 2007-07-03 2008-06-30 Fijación de tres puntos para los electrodos de encendido de un quemador
CN2008800115898A CN101652608B (zh) 2007-07-03 2008-06-30 燃烧器的点火电极的三点定位装置
PT08785889T PT2160542E (pt) 2007-07-03 2008-06-30 Fixação em três pontos de elétrodos de ignição de um queimador
US12/665,389 US8590285B2 (en) 2007-07-03 2008-06-30 Three-point fixing arrangement of ignition electrodes of a burner

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP2012060A1 true EP2012060A1 (fr) 2009-01-07

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 After (1)

Application Number Title Priority Date Filing Date
EP08785889A Active EP2160542B1 (fr) 2007-07-03 2008-06-30 Fixation en 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10072583B2 (en) 2016-07-07 2018-09-11 Rolls-Royce Plc Mounting bracket
EP3594478A1 (fr) * 2018-07-10 2020-01-15 United Technologies Corporation Support d'équilibrage

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140091672A (ko) * 2011-10-17 2014-07-22 볼보 컨스트럭션 이큅먼트 에이비 건설기계의 유압배관 고정장치
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
US12163765B2 (en) * 2020-02-01 2024-12-10 Roughrider Arms LLC Spark ignition flamethrower

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GB1190924A (en) * 1967-06-28 1970-05-06 Radiation Ltd Ignition Device
US4136259A (en) * 1975-10-21 1979-01-23 Djeddah Jacques L Igniting electrodes and method for making same
EP0193838A2 (fr) * 1985-03-04 1986-09-10 Siemens Aktiengesellschaft Disposition de brûleur pour installations de combustion, en particulier pour chambres de combustion d'installations de turbines à gaz ainsi que procédé de sa mise en oeuvre
DE9211464U1 (de) * 1992-08-26 1992-11-26 MEKU Metallverarbeitungs-GmbH, 7735 Dauchingen Vorrichtung zur Halterung der Zündelektroden in einer Mischeinrichtung eines Brenners
EP0593816A1 (fr) * 1992-10-23 1994-04-27 Asea Brown Boveri Ag Brûleur avec dispositif d'allumage électrique
DE29520584U1 (de) * 1994-12-27 1996-02-15 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Elektrodenhalterung
EP1605206A1 (fr) * 2004-06-09 2005-12-14 Rauschert GmbH Technische Keramik und Kunststoff-Formteile Ensemble d'électrodes

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1190924A (en) * 1967-06-28 1970-05-06 Radiation Ltd Ignition Device
US4136259A (en) * 1975-10-21 1979-01-23 Djeddah Jacques L Igniting electrodes and method for making same
EP0193838A2 (fr) * 1985-03-04 1986-09-10 Siemens Aktiengesellschaft Disposition de brûleur pour installations de combustion, en particulier pour chambres de combustion d'installations de turbines à gaz ainsi que procédé de sa mise en oeuvre
DE9211464U1 (de) * 1992-08-26 1992-11-26 MEKU Metallverarbeitungs-GmbH, 7735 Dauchingen Vorrichtung zur Halterung der Zündelektroden in einer Mischeinrichtung eines Brenners
EP0593816A1 (fr) * 1992-10-23 1994-04-27 Asea Brown Boveri Ag Brûleur avec dispositif d'allumage électrique
DE29520584U1 (de) * 1994-12-27 1996-02-15 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Elektrodenhalterung
EP1605206A1 (fr) * 2004-06-09 2005-12-14 Rauschert GmbH Technische Keramik und Kunststoff-Formteile Ensemble d'électrodes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10072583B2 (en) 2016-07-07 2018-09-11 Rolls-Royce Plc Mounting bracket
EP3594478A1 (fr) * 2018-07-10 2020-01-15 United Technologies Corporation Support d'équilibrage
US11002153B2 (en) 2018-07-10 2021-05-11 Raytheon Technologies Corporation Balance bracket

Also Published As

Publication number Publication date
WO2009003973A1 (fr) 2009-01-08
EP2160542B1 (fr) 2012-02-22
US8590285B2 (en) 2013-11-26
KR20100047240A (ko) 2010-05-07
CN101652608A (zh) 2010-02-17
RU2457399C2 (ru) 2012-07-27
US20100281848A1 (en) 2010-11-11
CN101652608B (zh) 2011-09-21
ES2379138T3 (es) 2012-04-23
PT2160542E (pt) 2012-03-09
DK2160542T3 (da) 2012-06-18
ATE546693T1 (de) 2012-03-15
JP2010532442A (ja) 2010-10-07
JP4833354B2 (ja) 2011-12-07
EP2160542A1 (fr) 2010-03-10
KR101493248B1 (ko) 2015-02-16
RU2010103446A (ru) 2011-08-10

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