EP0492384B1 - Buse pour un dispositif et procédé de pulvérisation à grande vitesse de la flamme - Google Patents

Buse pour un dispositif et procédé de pulvérisation à grande vitesse de la flamme Download PDF

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Publication number
EP0492384B1
EP0492384B1 EP91121679A EP91121679A EP0492384B1 EP 0492384 B1 EP0492384 B1 EP 0492384B1 EP 91121679 A EP91121679 A EP 91121679A EP 91121679 A EP91121679 A EP 91121679A EP 0492384 B1 EP0492384 B1 EP 0492384B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
cooling
gas
region
ambient air
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.)
Expired - Lifetime
Application number
EP91121679A
Other languages
German (de)
English (en)
Other versions
EP0492384A1 (fr
Inventor
Götz Matthäus
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.)
OSU-MASCHINENBAU GmbH
Original Assignee
OSU-MASCHINENBAU GmbH
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 OSU-MASCHINENBAU GmbH filed Critical OSU-MASCHINENBAU GmbH
Publication of EP0492384A1 publication Critical patent/EP0492384A1/fr
Application granted granted Critical
Publication of EP0492384B1 publication Critical patent/EP0492384B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/20—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion
    • B05B7/201—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/78—Cooling burner parts

Definitions

  • the invention is directed to a nozzle for a device for high-speed flame spraying of metallic, metallic-carbide and / or oxide-ceramic materials, the nozzle being equipped with a spray medium supply, a gas mixture supply with a combustion chamber and a cooled acceleration area, and a corresponding method.
  • Nozzles for high-speed flame spraying are known in different designs, the common feature of the known nozzles being that they have water-cooled acceleration or stabilization areas.
  • DE-A-39 03 887 and European patent applications EP-A-0 049 915, EP-A-0 135 826, EP-A-0 249 790 and EP-A- are examples of a large number of such solutions.
  • a disadvantage of these solutions is that the energy absorbed by the cooling water is lost to the process.
  • the cooling water can generally not be used for other purposes, ie a fluid is moved here that is only and exclusively used for cooling.
  • GB-A-733 401 shows a nozzle which requires an additional source of compressed air and in particular melts plastics.
  • the object of the invention is to provide a solution with which the temperature of the flame can be adjusted, the temperature-regulating fluid being able to be used directly in high-speed flame spraying.
  • the nozzle has a burner nozzle, the acceleration region following the burner nozzle mouth downstream, and in that at least part of the cooling of the acceleration region cooling gas channels and / or annular spaces for ambient air as Cooling gas with injection openings for sucking the cooling gas into the interior of the nozzle are provided.
  • this object is achieved according to the invention in that, in order to optimize the temperature and / or speed of the spray flame for cooling at least part of the acceleration area, ambient air is used in the nozzle and is fed to the flame spray area, the ambient air being drawn directly into the interior of the nozzle via injection openings becomes.
  • Another possibility with the nozzle according to the invention or with the method according to the invention is to leave the flame hot by adding the ambient air, but to slow the flow if it is not drawn directly into the interior or is only partially drawn.
  • the nozzles can be equipped with cooling channels in which additional cooling fins are provided.
  • the gas flow can also be selected so that it has a comparatively long flow path from the outside inwards in a meandering shape to the inside of the nozzle in order to absorb a large amount of heat.
  • cooling air there can be several inflow areas into the interior of the flow channel of the nozzle for cooling air, it also being possible to provide cooling ring channels which widen in a cascade fashion towards the tip, but which are provided with separate gas feeds and which extend up to Increase the tip to derive the gas volumes.
  • cooling gases are introduced as jacket gases at the end of the nozzle and only a part is drawn into the interior of the nozzle in the area of the ignition or combustion chamber.
  • FIGS. 1-7 all those parts are provided with the same reference numbers which are functionally the same, possibly supplemented by lower case letters for better identification.
  • the nozzle generally designated 1
  • the acceleration range 4 ends at the actual nozzle mouth, which is denoted by 5 in the example according to FIG. 1.
  • the acceleration area 4 is surrounded by an approximately cylindrical component 6, which partially surrounds the nozzle head 2 with its inner truncated cone in FIG. 1 and is surrounded on the outside by two coupling sleeves 7 and 8 such that, as shown, a flow channel is formed.
  • suction bores 11 are provided distributed around the circumference.
  • a nozzle flow assumed from left to right in FIG. 1 is generated, which is indicated by a large number of small arrows 12.
  • the outer wall of the acceleration area surrounding cylindrical part 6 can also be equipped with cooling fins 14, which the sucked air sweeps past and thus can increase the cooling.
  • FIG. 2 A modified exemplary embodiment is shown in FIG. 2, the component surrounding the acceleration region 4a being formed with two shells and bearing the reference numerals 6a and 6b there.
  • the essentially cylindrical element 6a carries the suction openings 11, while the likewise substantially cylindrical element 6b carries further suction openings 11a in such a way that the surroundings of cooling air can be sucked in in two stages.
  • FIG. 3 shows a somewhat different design in this respect, in which the element 6c leaves a suction ring gap 11c open, the suction openings for ambient air lying outside the cooling channels 9c are designated 11b in FIG. 3.
  • FIG. 4 shows another type of construction, which serves in particular to provide, for example, ambient air as the enveloping gas of the nozzle denoted by 1c, annular cooling channels 9d and 9e being arranged in cascade behind one another and each increasing in diameter.
  • the nozzle body 6d can be designed as a built-in part, corresponding ones lying against inner walls ring seals are shown and designated 15.
  • FIGS. 2 and 3 which is not shown in more detail in FIG. 4.
  • the nozzle 1c can also be used as a cascade injector, in such a way that different fuel gases can be mixed in through the suction openings 17 or 17 'or else different fuel gases with cooling gas, the front ring opening 16 also being replaceable by a plurality of outlet bores 16 distributed around the circumference '.
  • cooling channels 9f with a meandering cross section, with this construction having comparatively small injection bores 11f and a front annular outlet opening 16a by means of which the cooling gas can be supplied as jacket gas.
  • FIGS. 4 and 5 show that here cooling gas cannot only be supplied from the environment, but e.g. compressed air can also be added.
  • FIGS. 6 and 7 show design options for the nozzles 1e and 1f, in the case of those in the region of the nozzle body 2 or 2f the ambient air cooling is provided while parts of the acceleration range 4e or 4f have, for example, water cooling, the cooling channels of which are designated here as 17 or 17a and 18.

Landscapes

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

Claims (11)

  1. Tuyère (1) pour un dispositif de projection de métaux fondus ou de pistolage à la flamme à haute vitesse de matériaux métalliques, métallo-carbures et/ou de céramiques oxydées, la tuyère étant équipée d'une amenée de l'agent de projection, d'une amenée de mélange gazeux avec une chambre de combustion et une zone d'accélération refroidie (4),
    caractérisée en ce que
    la tuyère (1) comporte une tuyère de brûleur (2), la zone d'accélération (4) étant située en aval de l'embouchure de la tuyère de brûleur (3), et en ce qu'au moins pour une partie du refroidissement de la zone d'accélération (4) sont prévus des canaux de refroidissement de gaz (9) et/ou des chambres circulaires pour l'air environnant en tant que gaz de refroidissement avec des ouvertures d'injection (11) pour l'aspiration du gaz de refroidissement à l'intérieur de la tuyère (1).
  2. Tuyère selon la revendication 1,
    caractérisée en ce que
    des nervures de refroidissement (14) sont prévues dans la zone d'écoulement (9) du gaz de refroidissement.
  3. Tuyère selon la revendication 1 ou 2,
    caractérisée en ce que
    les ouvertures d'injection ou d'aspiration (11, 11a) dirigées vers l'intérieur de la tuyère (la) pour les gaz de refroidissement sont disposées à des niveaux de tuyère différents.
  4. Tuyère selon l'une des revendications précédentes,
    caractérisée en ce que
    les canaux de refroidissement des gaz ont une configuration sensiblement en méandres transversalement (9f).
  5. Tuyère selon l'une des revendications précédentes,
    caractérisée en ce que
    dans la zone du bec de tuyère (5) est prévue une ouverture circulaire (16) pour la sortie du gaz de refroidissement, en forme d'enveloppe.
  6. Tuyère selon l'une des revendications précédentes,
    caractérisée en ce qu'
    une zone partielle du tronçon de la tuyère d'accélération (4e, 4f) est dotée d'un refroidissement de liquide (17, 18).
  7. Tuyère selon la revendication 1,
    caractérisée en ce que
    pour le refroidissement sont prévus des canaux circulaires en cascade s'élargissant en direction de la pointe avec des amenées de gaz séparées.
  8. Tuyère selon l'une des revendications précédentes,
    caractérisée en ce que
    la tuyère est conçue sous forme d'injecteur en cascade (Fig.4) avec une pluralité d'amenée pour le gaz de combustion, le gaz de refroidissement et/ou les gaz de combustion de différentes compositions, ce en quoi dans la zone de bec de tuyère (5a) sont prévus des alésages de sortie répartis sur la périphérie (16') ou sur une ouverture circulaire (16).
  9. Dispositif pour la projection de métaux fondus ou le pistolage à la flamme haute vitesse faisant appel à des zones d'accélération refroidies de tuyère de projection,
    caractérisé en ce que
    pour optimiser la température et/ou la vitesse de la flamme de pulvérisation pour le refroidissement d'au moins une partie de la zone d'accélération on utilise l'air environnant de la tuyère et on l'amène à la zone de projection de flamme, l'air ambiant étant aspiré dans les ouvertures d'injection directement à l'intérieur de la tuyère.
  10. Procédé selon la revendication 9,
    caractérisé en ce qu'
    au moins une partie de l'air ambiant est distribué par les ouvertures circulaires dans la zone du bec de tuyère comme gaz d'enveloppe.
  11. Procédé selon la revendication 9,
    caractérisé en ce qu'
    en tant qu'air de refroidissement on utilise de plus de l'air comprimé.
EP91121679A 1990-12-22 1991-12-18 Buse pour un dispositif et procédé de pulvérisation à grande vitesse de la flamme Expired - Lifetime EP0492384B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4041623 1990-12-22
DE4041623A DE4041623A1 (de) 1990-12-22 1990-12-22 Duese fuer eine vorrichtung und ein verfahren zum hochgeschwindigkeitsflammenspritzen

Publications (2)

Publication Number Publication Date
EP0492384A1 EP0492384A1 (fr) 1992-07-01
EP0492384B1 true EP0492384B1 (fr) 1995-05-31

Family

ID=6421326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121679A Expired - Lifetime EP0492384B1 (fr) 1990-12-22 1991-12-18 Buse pour un dispositif et procédé de pulvérisation à grande vitesse de la flamme

Country Status (3)

Country Link
EP (1) EP0492384B1 (fr)
AT (1) ATE123238T1 (fr)
DE (2) DE4041623A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5467926A (en) * 1994-02-10 1995-11-21 Solar Turbines Incorporated Injector having low tip temperature
JP3823591B2 (ja) * 1999-03-25 2006-09-20 三菱電機株式会社 Ｃｖｄ原料用気化装置およびこれを用いたｃｖｄ装置
EP2060652B1 (fr) * 2006-08-14 2013-11-27 Nakayama Amorphous Co., Ltd. Procédé et dispositif de formage de film de revêtement amorphe
FR2928278A1 (fr) * 2008-03-04 2009-09-11 Dominique Bayle Dispositif mobile et transportable pour la projection d'un revetement
US8857733B1 (en) 2009-01-14 2014-10-14 Resodyn Corporation Flameless thermal spray system using flame heat source
US20110229649A1 (en) * 2010-03-22 2011-09-22 Baranovski Viatcheslav E Supersonic material flame spray method and apparatus
KR20140061422A (ko) 2011-07-25 2014-05-21 엑카르트 게엠베하 기판 코팅 방법 및 이러한 방법에서 첨가제 함유 분말 코팅 물질의 용도
DE102011052119A1 (de) 2011-07-25 2013-01-31 Eckart Gmbh Verfahren zur Substratbeschichtung und Verwendung additivversehener, pulverförmiger Beschichtungsmaterialien in derartigen Verfahren
DE102011052121A1 (de) 2011-07-25 2013-01-31 Eckart Gmbh Beschichtungsverfahren nutzend spezielle pulverförmige Beschichtungsmaterialien und Verwendung derartiger Beschichtungsmaterialien
DE102011052120A1 (de) 2011-07-25 2013-01-31 Eckart Gmbh Verwendung speziell belegter, pulverförmiger Beschichtungsmaterialien und Beschichtungsverfahren unter Einsatz derartiger Beschichtungsmaterialien
EP2959992A1 (fr) 2014-06-26 2015-12-30 Eckart GmbH Procédé de fabrication d'un aérosol contenant des particules
CN115161584B (zh) * 2022-07-01 2023-04-28 国家电投集团江西水电检修安装工程有限公司 一种火焰热喷涂方法及耐空蚀水轮机转轮叶片

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB733401A (en) * 1950-09-20 1955-07-13 Rheem Mfg Co Improvements in flame spray apparatus, particularly for spraying with a fusible material
CA1141650A (fr) * 1980-07-10 1983-02-22 Leonard M. Barisoff Bruleur a tube de soufflage

Also Published As

Publication number Publication date
EP0492384A1 (fr) 1992-07-01
DE59105625D1 (de) 1995-07-06
DE4041623A1 (de) 1992-06-25
ATE123238T1 (de) 1995-06-15

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