EP0492384A1 - Nozzle for device and method for high-speed flame spraying - Google Patents
Nozzle for device and method for high-speed flame spraying Download PDFInfo
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- EP0492384A1 EP0492384A1 EP91121679A EP91121679A EP0492384A1 EP 0492384 A1 EP0492384 A1 EP 0492384A1 EP 91121679 A EP91121679 A EP 91121679A EP 91121679 A EP91121679 A EP 91121679A EP 0492384 A1 EP0492384 A1 EP 0492384A1
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- Prior art keywords
- cooling
- nozzle
- gas
- acceleration
- region
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- 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-carabid and / or oxide-ceramic materials, the nozzle being equipped with a spray medium supply, a gas mixture supply with combustion chamber and a cooled acceleration area, and a corresponding method.
- Nozzles for high-speed flame spraying are known in different designs, with the known nozzles having in common that they have water-cooled acceleration or stabilization areas.
- DE 39 03 887-A1 and European patent applications EP 0 049 915-A1, EP 0 135 826-A1, EP 0 249 790-A2 and EP 0 361 709-A1 are examples of a large number of such solutions.
- the disadvantage of this solution is that the energy absorbed by the cooling water is lost to the process. Also, the cooling water cannot usually be used for other purposes, i.e. a fluid is moved here, which is used only and exclusively for cooling.
- the object of the invention is to provide a solution with the temperature of the flame is adjustable, the temperature-regulating fluid being able to be used directly in high-speed flame spraying.
- this object is achieved according to the invention in that gas cooling 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 for at least part of the cooling of the acceleration area.
- 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 a part of the acceleration region, ambient air is used in the nozzle and is fed to the flame spray region.
- Another possibility with the nozzle according to the invention or with the procedure 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 regions 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.
- part of the cooling gases is introduced as jacket gases at the end of the nozzle and only a part is drawn into the interior of the nozzle in the region 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 is used 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 FIG.
- 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 '.
- FIG. 5 shows cooling channels 9f with a cross-sectional meandering design, 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, too, cooling gas cannot necessarily be supplied from the environment, but e.g. can be given as compressed air.
- FIGS. 6 and 7 show design options for the nozzles 1e and 1f, in which the ambient air cooling is provided in the region of the nozzle body 2 and 2f, while parts of the acceleration range 4e or 4f have, for example, water cooling, which are designated by the cooling channels here with 17 or 17a and 18.
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Abstract
Description
Die Erfindung richtet sich auf eine Düse für eine Vorrichtung zum Hochgeschwindigkeitsflammenspritzen von metallischen, metallisch-carabidischen und/oder oxidkeramischen Werkstoffen, wobei die Düse mit einer Spritzmedienzufuhr, einer Gasgemischzufuhr mit Brennkammer und einem gekühlten Beschleunigungsbereich ausgerüstet ist, sowie auf ein entsprechendes Verfahren.The invention is directed to a nozzle for a device for high-speed flame spraying of metallic, metallic-carabid and / or oxide-ceramic materials, the nozzle being equipped with a spray medium supply, a gas mixture supply with combustion chamber and a cooled acceleration area, and a corresponding method.
Düsen zum Hochgeschwindigkeitsflammenspritzen sind in unterschiedlichen Gestaltungen bekannt, wobei den bekannten Düsen gemeinsam ist, daß diese wassergekühlten Beschleunigungs- bzw. Stabilisierungsbereiche aufweisen. Als Beispiel für eine Vielzahl derartiger Lösungen seien hier angeben die DE 39 03 887-A1 sowie die europäischen Patentanmeldungen EP 0 049 915-A1, EP 0 135 826-A1, EP 0 249 790-A2 und EP 0 361 709-A1. Nachteilig an dieser Lösung ist, daß die vom Kühlwasser aufgenommene Energie dem Prozeß verloren geht. Auch kann das Kühlwasser zu sonstigen Zwecken in der Regel nicht eingesetzt werden, d.h. hier wird ein Fluid bewegt, das nur und ausschließlich zur Kühlung herangezogen wird.Nozzles for high-speed flame spraying are known in different designs, with the known nozzles having in common that they have water-cooled acceleration or stabilization areas. DE 39 03 887-A1 and European patent applications EP 0 049 915-A1, EP 0 135 826-A1, EP 0 249 790-A2 and EP 0 361 709-A1 are examples of a large number of such solutions. The disadvantage of this solution is that the energy absorbed by the cooling water is lost to the process. Also, the cooling water cannot usually be used for other purposes, i.e. a fluid is moved here, which is used only and exclusively for cooling.
Aufgabe der Erfindung ist die Schaffung einer Lösung, mit der die Temperatur der Flamme einstellbar ist, wobei das temperaturregelnde Fluid unmittelbar beim Hochgeschwindigkeitsflammenspritzen eingesetzt werden kann.The object of the invention is to provide a solution with the temperature of the flame is adjustable, the temperature-regulating fluid being able to be used directly in high-speed flame spraying.
Mit einer Düse der eingangs bezeichneten Art wird diese Aufgabe gemäß der Erfindung dadurch gelöst, daß wenigstens für einen Teil der Kühlung des Beschleunigungsbereiches Gaskühlkanäle und/oder Ringräume für Umgebungsluft als Kühlgas mit Injektionsöffnungen zum Ansaugen des Kühlgases in das Innere der Düse vorgesehen sind.With a nozzle of the type described above, this object is achieved according to the invention in that gas cooling 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 for at least part of the cooling of the acceleration area.
Verfahrensmäßig wird diese Aufgabe gemäß der Erfindung dadurch gelöst, daß zur Optimierung der Temperatur und/oder Geschwindigkeit der Spritzflamme zur Kühlung wenigstens eines Teiles des Beschleunigungsbereiches Umgebungsluft der Düse eingesetzt und dem Flammenspritzbereich zugeführt wird.In procedural terms, 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 a part of the acceleration region, ambient air is used in the nozzle and is fed to the flame spray region.
Mit der erfindungsgemäßen Verfahrensweise bzw. der erfindungsgemäßen Düse läßt sich mit einfachen Mitteln eine sehr vielfältige Einflußnahme auf das Flammenspritzen ermöglichen. So besteht bei kurzen Düsen die Möglichkeit auf eine Wasserkühlung gänzlich zu verzichten. Die Kühlluft wird von der Düse in das Innere gesaugt und steht daher mit ihrer gesamten Energie unmittelbar dem Flammenspritzen zur Verfügung, d.h. die einzusetzende Energie kann reduziert werden. Umgekehrt kann bei Aufrechterhaltung der gleichen Energie durch die Kühlung die Geschwindigkeit des Gasstromes durch die angesogene Kühlluft vergrößert werden.With the procedure according to the invention or the nozzle according to the invention, a very diverse influence on flame spraying can be made possible with simple means. In the case of short nozzles, there is no need for water cooling. The cooling air is sucked into the interior of the nozzle and is therefore immediately available with its entire energy for flame spraying, ie the energy to be used can be reduced. Conversely, while maintaining the same energy the speed of the gas flow through the sucked cooling air can be increased by the cooling.
Eine andere Möglichkeit besteht mit der erfindungsgemäßen Düse bzw. mit der erfindungsgemäßen Verfahrensweise darin, die Flamme heiß zu belassen durch das Hinzufügen der Umgebungsluft, aber die Strömung zu verlangsamen, wenn sie nicht unmittelbar in das Innere eingesogen oder nur teilweise angesogen wird.Another possibility with the nozzle according to the invention or with the procedure 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.
Weitere vorteilhafte Ausgestaltungen sowohl der Düse als auch der erfindungsgemäßen Verfahrensweise ergeben sich aus den Unteransprüchen.Further advantageous embodiments of both the nozzle and the procedure according to the invention result from the subclaims.
Die Düsen können dabei mit Kühlkanälen ausgerüstet sein, in denen zusätzliche Kühlrippen vorgesehen sind. Die Gasführung kann auch so gewählt werden, daß sie von außen nach innen querschnittlich meanderförmig einen vergleichsweise langen Strömungsweg bis in das Innere der Düse zur Verfügung hat, um eine große Menge an Wärme aufzunehmen.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.
Es können mehrere Einströmungsbereiche in das Innere des Strömungskanales der Düse für Kühlluft vorgesehen sein, wobei es auch möglich ist, Kühlringkanäle vorzusehen, die sich kaskadenartig zur Spitze hin erweitern, allerdings mit getrennten Gaszuführungen versehen sind und die sich bis zur Spitze hin vergrößern, um die Gasvolumina ableiten zu können.There can be several inflow regions 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.
Zweckmäßig kann es auch sein, wenn ein Teil der Kühlgase als Mantelgase am Ende der Düse aufgegeben wird und nur ein Teil im Bereich der Zünd- bzw. Brennkammer in das Innere der Düse eingesogen wird.It can also be expedient if part of the cooling gases is introduced as jacket gases at the end of the nozzle and only a part is drawn into the interior of the nozzle in the region of the ignition or combustion chamber.
Je nach Betriebsart kann es sinnvoll sein, sich nicht nur auf das Ansaugverhalten zu verlassen, sondern gezielt zusätzlich als Kühlluft Preßluft aufzugeben, wie dies die Erfindung ebenfalls vorsieht.Depending on the operating mode, it can make sense not only to rely on the intake behavior, but also to specifically supply compressed air as cooling air, as is also provided by the invention.
Die Erfindung ist nachstehend anhand der Zeichnung beispielsweise näher erläutert. Diese zeigt jeweils im Schnitt in den Fig. 1 - 7 einen Querschnitt durch unterschiedliche Düsenformen nach der Erfindung.The invention is explained below with reference to the drawing, for example. 1-7 each shows a cross section through different nozzle shapes according to the invention.
In der nachfolgenden Beschreibung der Fig. 1 - 7 werden alle diejenigen Teile mit den identischen Bezugsziffern versehen, die funktionsmäßig gleich sind, ggf. zur besseren Identifizierung ergänzt durch Kleinbuchstaben.In the following description of 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.
Zunächst sei am Beispiel der Fig. 1 der grundsätzliche Aufbau einer Düse nach der Erfindung beschrieben. Die allgemein mit 1 bezeichnete Düse weist einen Düsenkopf 2 auf, wobei in Strömungsrichtung stromabwärts, d.h. in Fig. 1 nach rechts, dem mit 3 bezeichneten Brennerdüsenmund ein Beschleunigungs- bzw. Bündelungsbereich 4 folgt. Der Beschleunigungsbereich 4 endet am eigentlichen Düsenmund, der im Beispiel nach Fig. 1 mit 5 bezeichnet ist.First, the basic structure of a nozzle according to the invention will be described using the example of FIG. 1. The nozzle, generally designated 1, has a
Der Beschleunigungsbereich 4 ist von einem etwa zylindrischen Bauteil 6 umgeben, das mit seiner in Fig. 1 kegelstumpfförmig ausgebildeten Innenbohrung teilweise den Düsenkopf 2 umgibt und außen von zwei Überwurfhülsen 7 bzw. 8 derart umgeben ist, daß sich, wie dargestellt, ein Strömungskanal bildet. Am äußeren inneren, mit 10 bezeichneten Ende der Düse 2, sind am Umfang verteilt Ansaugbohrungen 11 vorgesehen.The acceleration area 4 is surrounded by an approximately cylindrical component 6, which partially surrounds the
Bei Betrieb der Düse 1 wird eine in Fig. 1 von links nach rechts angenommene Düsenströmung erzeugt, die mit einer Vielzahl von kleinen Pfeilen 12 angedeutet ist. Damit wird in dem Beschleunigungsbereich 4 ein Unterdruck erzeugt, derart, daß über die ringförmigen Gaskühlkanäle 9 von außen Umgebungsluft durch die Injektionsöffnungen bzw. Ansaugöffnungen 11 angesogen wird, der Verlauf der Umgebungsluftströmung ist ebenfalls durch kleine Pfeile wiedergegeben, im Bereich der Ansaugung ist einer der Pfeile mit 13 bezeichnet.During operation of the nozzle 1, a nozzle flow assumed from left to right in FIG. 1 is generated, which is indicated by a large number of
Dargestellt ist in Fig. 1 noch, daß die Außenwand des den Beschleunigungsbereich umgebenden zylindrischen Teiles 6 zusätzlich mit Kühlrippen 14 ausgestattet sein kann, an denen die angesogene Luft vorbeistreicht und damit die Kühlung erhöhen kann.It is shown in Fig. 1 that 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.
In Fig. 2 ist ein abgewandeltes Ausführungsbeispiel dargestellt, wobei dort das den Beschleunigungsbereich 4a umgebende Bauteil zweischalig ausgebildet ist und dort die Bezugszeichen 6a und 6b trägt. Das im wesentlichen zylindrische Element 6a trägt die Ansaugöffnungen 11, während das ebenfalls im wesentlichen zylindrische Element 6b weitere Ansaugöffnungen 11a trägt, derart, daß die Umgebung von Kühlluft zweistufig angesaugt werden kann.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
Eine etwas andere Gestaltung zeigt diesbezüglich die Fig. 3, bei der das Element 6c einen Ansaugringspalt 11c freiläßt, die außerhalb der Kühlkanäle 9c liegenden Ansaugöffnungen für Umgebungsluft sind in Fig. 3 mit 11b bezeichnet.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.
In Fig. 4 ist eine andere Art der Konstruktion dargestellt, die insbesondere dazu dient, beispielsweise Umgebungsluft als Hüllgas der mit 1c bezeichneten Düse zur Verfügung zu stellen, wobei dort ringförmige Kühlkanäle 9d und 9e kaskadenartig hintereinander angeordnet sind und sich jeweils im Durchmesser vergrößern. Der Düsenkörper 6d kann als Einbauteil gestaltet sein, entsprechende, sich an Innenwände anlegende Ringdichtungen sind eingezeichnet und mit 15 bezeichnet. Vor dem mit 5a bezeichneten Düsenmund können noch weitere Elemente etwa nach den Fig. 2 und 3 vorgesehen sein, was in Fig. 4 nicht näher dargestellt ist.4 shows another type of construction, which is used 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. In front of the nozzle mouth designated 5a, further elements can be provided, for example according to FIGS. 2 and 3, which is not shown in FIG.
Die Düse 1c kann auch als Kaskadeninjektor eingesetzt werden, in der Weise, daß durch die Ansaugöffnungen 17 oder 17' unterschiedliche Brenngase zumischbar sind oder aber auch unterschiedliche Brenngase mit Kühlgas, wobei die vordere Ringöffnung 16 auch ersetzbar ist durch eine Mehrzahl am Umfang verteilte Austrittbohrungen 16'.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
Die Fig. 5 zeigt bei Anlauf querschnittlich meanderförmig gestaltete Kühlkanäle 9f, wobei bei dieser Konstruktion vergleichsweise kleine Injektionsbohrungen 11f vorgesehen sind und eine vordere ringförmige Austrittsöffnung 16a, mittels der das Kühlgas als Mantelgas zuführbar ist.FIG. 5 shows cooling channels 9f with a cross-sectional meandering design, 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.
Durch Pfeile 17 bzw. 17a in den Fig. 4 bzw. 5 ist dargestellt, daß hier auch Kühlgas nicht zwingend von der Umgebung zuführbar ist, sondern z.B. als Preßluft aufgegeben werden kann.
Schließlich zeigen die Fig. 6 und 7 Gestaltungsmöglichkeiten der Düsen 1e und 1f, bei denen im Bereich des Düsenkörpers 2 bzw. 2f die Umgebungsluftkühlung vorgesehen ist, während Teile des Beschleunigungsbereiches 4e bzw. 4f beispielsweise eine Wasserkühlung aufweisen, was mit deren Kühlkanäle hier mit 17 bzw. 17a und 18 bezeichnet sind.Finally, FIGS. 6 and 7 show design options for the nozzles 1e and 1f, in which the ambient air cooling is provided in the region of the
Natürlich ist das beschriebene Ausführungsbeispiel der Erfindung noch in vielfacher Hinsicht abzuändern, ohne den Grundgedanken zu verlassen. So sei insbesondere darauf hingewiesen, daß die Erfindung nicht auf die dargestellten vereinfacht wiedergegebenen Düsenformen beschränkt ist. Die Art der Konstruktion ist dort nur angedeutet. Je nach Einsatz kann auch ein Wechsel zwischen Gas- und Flüssigkeitskühlung vorgenommen werden und dgl. mehr.Of course, the described embodiment of the invention can be modified in many ways without departing from the basic idea. It should be pointed out in particular that the invention is not limited to the nozzle shapes shown in simplified form. The type of construction is only hinted at there. Depending on the application, it is also possible to switch between gas and liquid cooling and the like.
Claims (12)
dadurch gekennzeichnet,
daß wenigstens für einen Teil der Kühlung des Beschleunigungsbereiches (4) Gaskühlkanäle (9) und/oder -ringräume für Umgebungsluft als Kühlgas mit Injektionsöffnungen (11) zum Ansaugen des Kühlgases in das Innere der Düse (1) vorgesehen sind.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 combustion chamber and a cooled acceleration area,
characterized,
that at least for part of the cooling of the acceleration area (4) gas cooling channels (9) and / or annular spaces for ambient air are provided as cooling gas with injection openings (11) for sucking the cooling gas into the interior of the nozzle (1).
dadurch gekennzeichnet,
daß im Strömungsbereich (9) des Kühlgases Kühlrippen (14) vorgesehen sind.Device according to claim 1,
characterized,
that cooling fins (14) are provided in the flow region (9) of the cooling gas.
dadurch gekennzeichnet,
daß die zum Inneren der Düse (1a) weisenden Ansaug- bzw. Injektionsöffnungen (11,11a) für Kühlgase in unterschiedlichen Düsenebenen vorgesehen sind.Device according to claim 1 or 2,
characterized,
that the suction or injection openings (11, 11a) facing the inside of the nozzle (1a) are provided for cooling gases in different nozzle levels.
dadurch gekennzeichnet,
daß die Gaskühlkanäle querschnittlich (9f) etwa meanderförmig ausgebildet sind.Device according to one of the preceding claims,
characterized,
that the gas cooling ducts are cross-sectionally (9f) approximately meandering.
dadurch gekennzeichnet,
daß im Düsenmundbereich (5) eine Ringöffnung (16) zum Austritt von als Mantel ausgebildetem Kühlgas vorgesehen ist.Device according to one of the preceding claims,
characterized,
that an annular opening (16) is provided in the nozzle mouth region (5) for the exit of cooling gas designed as a jacket.
dadurch gekennzeichnet,
daß ein Teilbereich der gekühlten Beschleunigungsdüsenstrecke (4e,4f) mit einer Flüssigkeitskühlung (17,18) ausgebildet ist.Device according to one of the preceding claims,
characterized,
that a portion of the cooled acceleration nozzle section (4e, 4f) is designed with liquid cooling (17, 18).
dadurch gekennzeichnet,
daß zur Kühlung kaskadenartig sich zur Spitze hin erweiternde Ringkanäle (9d,9e) mit getrennten Gaszuführungen vorgesehen sind.Device according to claim 1,
characterized,
that for cooling cascade-like ring channels (9d, 9e) are provided with separate gas feeds.
dadurch gekennzeichnet,
daß die Düse als Kaskadeninjektor (Fig. 4) ausgebildet ist mit einer Mehrzahl von Zuführungen für Brenngas, Kühlgas und/oder Brenngase unterschiedlicher Zusammensetzungen, wobei im Düsenmundbereich (5a) am Umfang verteilt Austrittsbohrungen (16') oder eine Ringöffnung (16) vorgesehen sind.Device according to one of the preceding claims,
characterized,
that the nozzle is designed as a cascade injector (Fig. 4) with a plurality of feeds for fuel gas, cooling gas and / or fuel gases of different compositions, wherein In the nozzle mouth region (5a), outlet bores (16 ') distributed around the circumference or an annular opening (16) are provided.
dadurch gekennzeichnet,
daß zur Optimierung der Temperatur und/oder Geschwindigkeit der Spritzflamme zur Kühlung wenigstens eines Teiles des Beschleunigungsbereiches Umgebungsluft der Düse eingesetzt und dem Flammspritzbereich zugeführt wird.Process for high-speed flame spraying using cooled acceleration areas of spray nozzles,
characterized,
that ambient air of the nozzle is used to optimize the temperature and / or speed of the spray flame for cooling at least part of the acceleration region and is supplied to the flame spray region.
dadurch gekennzeichnet,
daß die Umgebungsluft über Injektionsöffnungen unmittelbar in das Innere der Düse eingesogen wird.Method according to claim 9,
characterized,
that the ambient air is sucked directly into the interior of the nozzle via injection openings.
dadurch gekennzeichnet,
daß wenigstens ein Teil der Kühlgase über Ringöffnungen im Düsenmundbereich als Mantelgas aufgegeben wird.A method according to claim 9 or 10,
characterized,
that at least some of the cooling gases are added as jacket gas via ring openings in the nozzle mouth area.
dadurch gekennzeichnet,
daß zusätzlich Druckluft als Kühlluft eingesetzt wird.Method according to claim 9 or one of the following,
characterized,
that additional compressed air is used as cooling air.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4041623 | 1990-12-22 | ||
| DE4041623A DE4041623A1 (en) | 1990-12-22 | 1990-12-22 | NOZZLE FOR A DEVICE AND A METHOD FOR HIGH-SPEED FLAME SPRAYING |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0492384A1 true EP0492384A1 (en) | 1992-07-01 |
| EP0492384B1 EP0492384B1 (en) | 1995-05-31 |
Family
ID=6421326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91121679A Expired - Lifetime EP0492384B1 (en) | 1990-12-22 | 1991-12-18 | Nozzle for device and method for high-speed flame spraying |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0492384B1 (en) |
| AT (1) | ATE123238T1 (en) |
| DE (2) | DE4041623A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995022033A1 (en) * | 1994-02-10 | 1995-08-17 | Solar Turbines Incorporated | Injector having low tip temperature |
| EP1038988A2 (en) * | 1999-03-25 | 2000-09-27 | Mitsubishi Denki Kabushiki Kaisha | Vaporizing device for CVD apparatus |
| FR2928278A1 (en) * | 2008-03-04 | 2009-09-11 | Dominique Bayle | Powder coating product flame-spraying device for use in e.g. building site, has trolley to support powder-coated reservoir with powder suction unit and pistol, where mixture of powder with compressed air is realized at level of suction unit |
| US20110229649A1 (en) * | 2010-03-22 | 2011-09-22 | Baranovski Viatcheslav E | Supersonic material flame spray method and apparatus |
| DE102011052120A1 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Use of specially coated, powdery coating materials and coating methods using such coating materials |
| WO2013014214A2 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Coating method using special powdered coating materials and use of such coating materials |
| WO2013014213A2 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Methods for substrate coating and use of additive-containing powdered coating materials in such methods |
| DE102011052119A1 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Coating method of particle-containing powdery coating material used for automobile component, involves performing flame spraying, high-speed flame spraying, thermal plasma spraying and/or non-thermal plasma spraying method |
| US20150182989A1 (en) * | 2009-01-14 | 2015-07-02 | Resodyn Corporation | Flameless thermal spray system using flame heat source |
| EP2959992A1 (en) | 2014-06-26 | 2015-12-30 | Eckart GmbH | Method for producing a particulate-containing aerosol |
| CN115161584A (en) * | 2022-07-01 | 2022-10-11 | 国家电投集团江西水电检修安装工程有限公司 | Flame thermal spraying method and cavitation erosion resistant water turbine runner blade |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101365310B1 (en) * | 2006-08-14 | 2014-02-19 | 가부시키가이샤 나카야마 아몰퍼스 | Method and apparatus for forming amorphous coating film |
Citations (2)
| 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 (en) * | 1980-07-10 | 1983-02-22 | Leonard M. Barisoff | Blowpipe type of burner |
-
1990
- 1990-12-22 DE DE4041623A patent/DE4041623A1/en not_active Withdrawn
-
1991
- 1991-12-18 AT AT91121679T patent/ATE123238T1/en not_active IP Right Cessation
- 1991-12-18 EP EP91121679A patent/EP0492384B1/en not_active Expired - Lifetime
- 1991-12-18 DE DE59105625T patent/DE59105625D1/en not_active Expired - Fee Related
Patent Citations (2)
| 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 (en) * | 1980-07-10 | 1983-02-22 | Leonard M. Barisoff | Blowpipe type of burner |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995022033A1 (en) * | 1994-02-10 | 1995-08-17 | Solar Turbines Incorporated | Injector having low tip temperature |
| EP1038988A2 (en) * | 1999-03-25 | 2000-09-27 | Mitsubishi Denki Kabushiki Kaisha | Vaporizing device for CVD apparatus |
| EP1038988A3 (en) * | 1999-03-25 | 2003-01-29 | Mitsubishi Denki Kabushiki Kaisha | Vaporizing device for CVD apparatus |
| FR2928278A1 (en) * | 2008-03-04 | 2009-09-11 | Dominique Bayle | Powder coating product flame-spraying device for use in e.g. building site, has trolley to support powder-coated reservoir with powder suction unit and pistol, where mixture of powder with compressed air is realized at level of suction unit |
| US9533318B2 (en) | 2009-01-14 | 2017-01-03 | Resodyn Corporation | Flameless thermal spray system using flame heat source |
| US20150182989A1 (en) * | 2009-01-14 | 2015-07-02 | 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 |
| DE102011052119A1 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Coating method of particle-containing powdery coating material used for automobile component, involves performing flame spraying, high-speed flame spraying, thermal plasma spraying and/or non-thermal plasma spraying method |
| WO2013014213A2 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Methods for substrate coating and use of additive-containing powdered coating materials in such methods |
| DE102011052121A1 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Coating process using special powder coating materials and use of such coating materials |
| WO2013014211A2 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Use of specially coated powdered coating materials and coating methods using such coating materials |
| WO2013014214A2 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Coating method using special powdered coating materials and use of such coating materials |
| DE102011052120A1 (en) | 2011-07-25 | 2013-01-31 | Eckart Gmbh | Use of specially coated, powdery coating materials and coating methods using such coating materials |
| US9580787B2 (en) | 2011-07-25 | 2017-02-28 | Eckart Gmbh | Coating method using special powdered coating materials and use of such coating materials |
| EP2959992A1 (en) | 2014-06-26 | 2015-12-30 | Eckart GmbH | Method for producing a particulate-containing aerosol |
| CN115161584A (en) * | 2022-07-01 | 2022-10-11 | 国家电投集团江西水电检修安装工程有限公司 | Flame thermal spraying method and cavitation erosion resistant water turbine runner blade |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0492384B1 (en) | 1995-05-31 |
| DE4041623A1 (en) | 1992-06-25 |
| DE59105625D1 (en) | 1995-07-06 |
| ATE123238T1 (en) | 1995-06-15 |
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