EP1470864A2 - Two-fluid spray nozzle - Google Patents

Two-fluid spray nozzle Download PDF

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Publication number
EP1470864A2
EP1470864A2 EP04006996A EP04006996A EP1470864A2 EP 1470864 A2 EP1470864 A2 EP 1470864A2 EP 04006996 A EP04006996 A EP 04006996A EP 04006996 A EP04006996 A EP 04006996A EP 1470864 A2 EP1470864 A2 EP 1470864A2
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EP
European Patent Office
Prior art keywords
zweistoffsprühdüse
displacement body
liquid
tear
mixing chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04006996A
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German (de)
French (fr)
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EP1470864B1 (en
EP1470864A3 (en
Inventor
Emmerich Bauer
Reinhard Gaa
Dieter Kelz
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Lechler GmbH
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Lechler GmbH
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Priority to PL04006996T priority Critical patent/PL1470864T3/en
Publication of EP1470864A2 publication Critical patent/EP1470864A2/en
Publication of EP1470864A3 publication Critical patent/EP1470864A3/en
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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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0892—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
    • B05B7/0466—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber with means for deflecting the central liquid flow towards the peripheral gas flow

Definitions

  • the invention relates to a Zweistoffsprühdüse with one in a housing arranged in front of an outlet opening mixing chamber, in the supply channels for a liquid and a gaseous medium open and in the an impact body is provided on which the liquid jet impinges.
  • a Zweistoffsprühdüse of the type mentioned is from the DE 31 31 070 C2 discloses where to place in a mixing chamber an impact table has arranged, which is opposite to an inlet opening for the liquid.
  • the impact surface of the impact table is perpendicular to the axis the liquid jet and in alignment with the feed axis of the gaseous Mediums arranged in the middle of a mixing chamber.
  • the on the Impact impinging liquid jet therefore bursts in the mixing chamber on and is carried along by the compressed air, in the further course of the mixing chamber if possible evenly distributed and then by one on the axis of the feed opening discharged for the compressed air outlet opening.
  • the invention is based on the object in a two-component spray nozzle of the type mentioned a homogeneous mixture as possible between liquid and gaseous phase to achieve the known Zweistoffsprühdüsen not readily and only by mixing chamber arrangements is achievable, the relatively much space to have.
  • the invention is to solve this problem in a two-component spray nozzle of the type mentioned above in that the impact body as a coaxial with the liquid jet aligned, in the flow direction up to a tear-off widening displacement body with a directed against the flow of liquid tip formed is, and that the supply channels for the gaseous medium in the the widening portion of the displacement body surrounding part of Open mixing chamber.
  • the impact body as a coaxial with the liquid jet aligned, in the flow direction up to a tear-off widening displacement body with a directed against the flow of liquid tip formed is, and that the supply channels for the gaseous medium in the the widening portion of the displacement body surrounding part of Open mixing chamber.
  • the supply channels for the gaseous Open the medium in the direction of flow before the tear-off edge and they can be approximately parallel to the flow direction of the liquid jet run, which has the advantage that the supply channels for both Media can be led to a common connection point and not, as in the prior art two-component spray nozzles perpendicular to each other and a relatively large space requirement to have.
  • the inner wall of the mixing chamber run approximately parallel to the contour of the displacement body, so that the air to be mixed with the liquid closely to the displacement body and can be guided to the tear-off edge where the mixture takes place with the liquid film ring.
  • the displacement body may be formed as a pyramid. In simple way, but it can also be designed as a cone whose Axis coincides with the axis of the liquid supply. In Advantageous embodiment, it is also possible, the displacement body form as a double cone, which extends in the flow direction up to Tear edge extended and then rejuvenated. This embodiment together with the corresponding narrowing inner wall of the Mixing chamber the possibility of the outlet or the outlet openings at different places in the area behind the tear-off edge. It is also given the mixing range, the by the embodiment according to the invention, however, not too big Flow length required.
  • the expansion angle of the Enlarge cone in the area of the tear-off edge so that a circumferential Edge forms the largest diameter.
  • the outlet opening several behind the region of the tear-off edge of the displacement body arranged exit holes consist whose number, position and Exit angle depending on the desired spray angle and Spray jet is selectable.
  • the effect of the invention is crucial the distribution of the liquid supplied in a thinner and thinner Liquid film and its mixing with the in the field of Tearing edge of the displacement body supplied air.
  • the single drawing shows a nozzle head 1, in unspecified described Way with a connecting thread 2 to a dot-dash line indicated pipe 3 can be attached, which with supply channels for a liquid Medium and is provided for a gaseous medium.
  • the nozzle head 1 consists of the already mentioned connection part 3 with the Connecting thread 2 and from one to a thread 4 of the connection part 3 screwed cap part 5, on its inside with a Impact body is provided in the form of a displacement body 6, which is connected by a screw 7 with the cap 5, or pressed becomes.
  • the displacement body 6 consists of a rotationally symmetrical Bicone, the tip 8 facing away from the cap 5 Cone part 9 on the axis 10 of the nozzle head 1 and a central Zu Industriesbohrung 11 is located, the liquid to be sprayed in mind of the arrow 12 is supplied under pressure.
  • the cone part 9 then goes into an annular truncated cone portion 13 over, the slope opposite the axis 10 is flatter and merges into a cylindrical ring 21, the at its periphery forms a tear-off edge 15, from which the cone part 14 tapers down into the cap 5 in.
  • annular mixing chamber 16 in which through the Connecting part 3 through feed holes 17 for the gaseous medium lead, in the sense of arrows 18 through the dash-dotted tube or otherwise supplied.
  • the inner walls of the mixing chamber 16 run approximately parallel to the contour of the displacement body 6th
  • feed bores 17 are approximately parallel to the Feed bore 11 extend for the liquid and in a range of Mixing chamber 16 open, which is still in front of the tear-off edge 15.
  • exit holes are behind the tear-off 19 provided evenly on the circumference of the cap. 5 are distributed.
  • the exit angle of these holes 19, measured to Axis 10 of the nozzle head 1, may be selected differently. This also applies to the number of holes 19 and their radial distance from the central axis 10. It would also be possible, for example, the Close the outlet openings closer to the axis 10 and the exit angle to change, as indicated by the axis 20.
  • the entering in the direction of arrow 12 liquid enters as a full jet the mixing chamber 16 and strikes the top 8 of the cone. 9 on.
  • the liquid is thereby evenly on the surface of the 9 cone distributed and the thickness of the resulting liquid film decreases with increasing diameter of the cone 9.
  • the liquid film is deflected in a direction that almost perpendicular to the feed direction of the bores 17. The liquid film is therefore due to the incoming gaseous medium in entrained the mixing chamber, evenly distributed to fine droplets and then as sprays through the openings 19 to the outside guided.
  • the mode of action of the fine distribution of the liquid is based on this in the supplied air on the division of a liquid jet in an annular liquid film, which is particularly effective Way is taken by transversely incident air jets. As can be seen, the space requirement of such a spray head relatively low.
  • the displacement body is a rotationally symmetrical Cone shown. It is also possible, however, a pyramidal Provide displacement body, which also starting from a distribution tip divides the liquid into a film, which is then removed from the infused gaseous medium is divided.

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  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Abstract

A two component spray head which produces a fine mist of even consistency has the liquid (12) ducted onto a tapering thrust element (9) set with narrow upper end facing the fluid flow. The liquid is split into a widening tapering film which breaks into droplets at a central belt (15) around the thrust element. Gas is ducted (18) to mix with the droplets at the breaker edge of the belt to produce the fine mist which is expelled via jets (19) spaced about the spray head. The tapering thrust element has a tapering lower section (14) which is secured in the top of the spray head.

Description

Die Erfindung betrifft eine Zweistoffsprühdüse mit einer in einem Gehäuse vor einer Austrittsöffnung angeordneten Mischkammer, in die Zufuhrkanäle für ein flüssiges und ein gasförmiges Medium münden und in der ein Prallkörper vorgesehen ist, auf den der Flüssigkeitsstrahl auftrifft.The invention relates to a Zweistoffsprühdüse with one in a housing arranged in front of an outlet opening mixing chamber, in the supply channels for a liquid and a gaseous medium open and in the an impact body is provided on which the liquid jet impinges.

Bei solchen Zweistoffsprühdüsen mit innerer Mischung wird in der Regel die Gasmenge fein verteilt in einen Flüssigkeitsstrahl eingeleitet und das entstandene mehr oder weniger homogene Gemisch wird über die verengte Austrittsöffnung ausgeleitet.In such Zweistoffsprühdüsen with internal mixture is usually the amount of gas finely distributed introduced into a liquid jet and the resulting more or less homogeneous mixture is over the narrowed Outlet outlet.

Eine Zweistoffsprühdüse der eingangs genannten Art ist dabei aus der DE 31 31 070 C2 bekannt, wo man in einer Mischkammer einen Pralltisch angeordnet hat, der einer Eintrittsöffnung für die Flüssigkeit gegenüberliegt. Die Auftrefffläche des Pralltisches ist dabei senkrecht zur Achse des Flüssigkeitsstrahls und fluchtend zur Zuführachse des gasförmigen Mediums in der Mitte einer Mischkammer angeordnet. Der auf den Pralltisch auftreffende Flüssigkeitsstrahl platzt daher in der Mischkammer auf und wird von der senkrecht dazu geführten Druckluft mitgenommen, im weiteren Verlauf der Mischkammer nach Möglichkeit gleichmäßig verteilt und dann durch eine auf der Achse der Zufuhröffnung für die Druckluft liegende Austrittsöffnung abgegeben.A Zweistoffsprühdüse of the type mentioned is from the DE 31 31 070 C2 discloses where to place in a mixing chamber an impact table has arranged, which is opposite to an inlet opening for the liquid. The impact surface of the impact table is perpendicular to the axis the liquid jet and in alignment with the feed axis of the gaseous Mediums arranged in the middle of a mixing chamber. The on the Impact impinging liquid jet therefore bursts in the mixing chamber on and is carried along by the compressed air, in the further course of the mixing chamber if possible evenly distributed and then by one on the axis of the feed opening discharged for the compressed air outlet opening.

Bei einer anderen Bauart nach der DE-OS 22 52 218 trifft der Flüssigkeitsstrahl am Ende einer Mischkammer auf einen Prallteller auf und wird mit Luft gemischt, die tangential in die vor dem Prallteller liegende Mischkammer eingeleitet wird. Das so durch Verwirbelung erzeugte Gemisch tritt dann in einen Ringkanal hinter dem Prallteller ein und wird an einer Austrittsöffnung abgegeben, der ein zweiter Prallteller nachgeschaltet ist.In another type according to DE-OS 22 52 218 hits the liquid jet at the end of a mixing chamber on a baffle plate and is mixed with air, which is tangential in the front of the baffle plate Mixing chamber is initiated. The so generated by turbulence Mixture then enters an annular channel behind the baffle plate and becomes delivered at an outlet opening, followed by a second baffle plate is.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Zweistoffsprühdüse der eingangs genannten Art eine möglichst homogene Mischung zwischen flüssiger und gasförmiger Phase zu erreichen, die bei bekannten Zweistoffsprühdüsen nicht ohne weiteres und auch nur durch Mischkammeranordnungen erreichbar ist, die verhältnismäßig viel Platzbedarf haben.The invention is based on the object in a two-component spray nozzle of the type mentioned a homogeneous mixture as possible between liquid and gaseous phase to achieve the known Zweistoffsprühdüsen not readily and only by mixing chamber arrangements is achievable, the relatively much space to have.

Die Erfindung besteht zur Lösung dieser Aufgabe bei einer Zweistoffsprühdüse der eingangs genannten Art darin, dass der Prallkörper als ein koaxial zu dem Flüssigkeitsstrahl ausgerichteter, sich in Strömungsrichtung bis zu einer Abreißkante erweiternder Verdrängungskörper mit einer gegen die Strömung der Flüssigkeit gerichteten Spitze ausgebildet ist, und dass die Zufuhrkanäle für das gasförmige Medium in den den erweiternden Bereich des Verdrängungskörpers umgebenden Teil der Mischkammer münden. Durch diese Ausgestaltung wird die als Vollstrahl in die Mischkammer eintretende Flüssigkeit ausgehend von einer Verteilspitze in einen Flüssigkeitsfilm aufgeteilt, dessen Dicke mit wachsendem Durchmesser des Verdrängungskörpers abnimmt. Auf diesen relativ dünnen Flüssigkeitsfilm wird an der Abrisskante des Verdrängungskörpers das gasförmige Medium geleitet und zerteilt ihn im Inneren der Düse in feine Tropfen. Da bei dieser Art der Ausgestaltung der Flüssigkeitsfilm über den Umfang des Verdrängungskörpers verteilt gleichmäßig ausgebildet sein kann, wird auch eine weitgehend homogene Mischung mit der Luft erreicht, die im abgegebenen Sprühstrahl zu einem Tropfenspektrum großer Gleichmäßigkeit führt.The invention is to solve this problem in a two-component spray nozzle of the type mentioned above in that the impact body as a coaxial with the liquid jet aligned, in the flow direction up to a tear-off widening displacement body with a directed against the flow of liquid tip formed is, and that the supply channels for the gaseous medium in the the widening portion of the displacement body surrounding part of Open mixing chamber. By this configuration is as a full jet in the mixing chamber entering liquid starting from a Distributed tip in a liquid film, the thickness of which increases with Diameter of the displacement body decreases. On this relatively thin liquid film is at the trailing edge of the displacement body the gaseous medium passes and divides it inside the nozzle into fine drops. Since in this type of embodiment of the Liquid film distributed over the circumference of the displacement body can be uniform, is also a largely homogeneous Mixture with the air reached in the spray delivered to a drop spectrum of great uniformity.

In Weiterbildung der Erfindung können die Zufuhrkanäle für das gasförmige Medium in der Strömungsrichtung vor der Abreißkante münden und sie können in etwa parallel zur Strömungsrichtung des Flüssigkeitsstrahles verlaufen, was den Vorteil bringt, dass die Zufuhrkanäle für beide Medien zu einer gemeinsamen Anschlussstelle geführt werden können und nicht, wie bei Zweistoffsprühdüsen nach dem Stand der Technik senkrecht zueinander stehen und einen relativ großen Raumbedarf haben.In a further development of the invention, the supply channels for the gaseous Open the medium in the direction of flow before the tear-off edge and they can be approximately parallel to the flow direction of the liquid jet run, which has the advantage that the supply channels for both Media can be led to a common connection point and not, as in the prior art two-component spray nozzles perpendicular to each other and a relatively large space requirement to have.

In Ausgestaltung der Erfindung kann die Innenwand der Mischkammer in etwa parallel zu der Kontur des Verdrängungskörpers verlaufen, so dass die mit der Flüssigkeit zu mischende Luft eng an den Verdrängungskörper und an die Abreißkante geführt werden kann, wo die Mischung mit dem Flüssigkeitsfilmring erfolgt.In an embodiment of the invention, the inner wall of the mixing chamber run approximately parallel to the contour of the displacement body, so that the air to be mixed with the liquid closely to the displacement body and can be guided to the tear-off edge where the mixture takes place with the liquid film ring.

Der Verdrängungskörper kann als eine Pyramide ausgebildet sein. In einfacher Weise kann er aber auch als ein Kegel ausgebildet sein, dessen Achse mit der Achse der Flüssigkeitszuführung zusammenfällt. In vorteilhafter Ausgestaltung ist es auch möglich, den Verdrängungskörper als Doppelkegel auszubilden, der sich in Strömungsrichtung bis zur Abreißkante erweitert und dann wieder verjüngt. Diese Ausgestaltung gibt zusammen mit der entsprechend sich verengenden Innenwand der Mischkammer die Möglichkeit, die Austrittsöffnung oder die Austrittsöffnungen an verschiedenen Stellen im Bereich hinter der Abreißkante anzubringen. Es wird dadurch auch der Mischbereich vorgegeben, der durch die erfindungsgemäße Ausgestaltung allerdings keine allzu große Strömungslänge erforderlich macht.The displacement body may be formed as a pyramid. In simple way, but it can also be designed as a cone whose Axis coincides with the axis of the liquid supply. In Advantageous embodiment, it is also possible, the displacement body form as a double cone, which extends in the flow direction up to Tear edge extended and then rejuvenated. This embodiment together with the corresponding narrowing inner wall of the Mixing chamber the possibility of the outlet or the outlet openings at different places in the area behind the tear-off edge. It is also given the mixing range, the by the embodiment according to the invention, however, not too big Flow length required.

In Ausgestaltung der Erfindung kann sich der Erweiterungswinkel des Kegels im Bereich der Abreißkante vergrößern, so dass ein umlaufender Rand den größten Durchmesser bildet. Durch diese Maßnahme findet eine Umlenkung des Flüssigkeitsfilmes in eine in etwa senkrecht zur zugeführten Luft verlaufende Ebene statt, die der Vermischung dienlich ist.In an embodiment of the invention, the expansion angle of the Enlarge cone in the area of the tear-off edge, so that a circumferential Edge forms the largest diameter. By this measure finds a deflection of the liquid film in an approximately perpendicular to the supplied Air plane instead, which is useful for mixing.

In Ausgestaltung der Erfindung kann schließlich die Austrittsöffnung aus mehreren hinter dem Bereich der Abreißkante des Verdrängungskörpers angeordneten Austrittsbohrungen bestehen, deren Anzahl, Lage und Austrittswinkel in Abhängigkeit vom gewünschten Sprühwinkel und Sprühstrahl wählbar ist. Für die Wirkung der Erfindung entscheidend ist die Verteilung der zugeführten Flüssigkeit in einen immer dünner werdenden Flüssigkeitsfilm und dessen Vermischung mit der im Bereich der Abreißkante des Verdrängungskörpers zugeführten Luft.In an embodiment of the invention, finally, the outlet opening several behind the region of the tear-off edge of the displacement body arranged exit holes consist whose number, position and Exit angle depending on the desired spray angle and Spray jet is selectable. For the effect of the invention is crucial the distribution of the liquid supplied in a thinner and thinner Liquid film and its mixing with the in the field of Tearing edge of the displacement body supplied air.

Die Erfindung ist in der Zeichnung anhand eines Ausführungsbeispiels dargestellt und wird im folgenden erläutert.The invention is illustrated in the drawing with reference to an embodiment and will be explained below.

Die einzige Zeichnung zeigt einen Düsenkopf 1, der in nicht näher beschriebener Weise mit einem Anschlussgewinde 2 an ein strichpunktiert angedeutetes Rohr 3 ansetzbar ist, das mit Zufuhrkanälen für ein flüssiges Medium und für ein gasförmiges Medium versehen ist. Der Düsenkopf 1 besteht dabei aus dem bereits erwähnten Anschlussteil 3 mit dem Anschlussgewinde 2 und aus einem auf ein Gewinde 4 des Anschlussteiles 3 aufgeschraubten Kappenteil 5, der auf seiner Innenseite mit einem Prallkörper in der Form eines Verdrängungskörpers 6 versehen ist, der durch eine Schraube 7 mit der Kappe 5 verbunden ist, oder eingepresst wird.The single drawing shows a nozzle head 1, in unspecified described Way with a connecting thread 2 to a dot-dash line indicated pipe 3 can be attached, which with supply channels for a liquid Medium and is provided for a gaseous medium. The nozzle head 1 consists of the already mentioned connection part 3 with the Connecting thread 2 and from one to a thread 4 of the connection part 3 screwed cap part 5, on its inside with a Impact body is provided in the form of a displacement body 6, which is connected by a screw 7 with the cap 5, or pressed becomes.

Der Verdrängungskörper 6 besteht dabei aus einem rotationssymmetrischen Doppelkegel, wobei die Spitze 8 des von der Kappe 5 abgewandten Kegelteiles 9 auf der Achse 10 des Düsenkopfes 1 und einer zentralen Zuführbohrung 11 liegt, der die zu versprühende Flüssigkeit im Sinn des Pfeiles 12 unter Druck zugeführt wird. Der Kegelteil 9 geht dann in einen ringförmigen Kegelstumpfteil 13 über, dessen Steigung gegenüber der Achse 10 flacher ist und der in einen zylindrischen Ring 21 übergeht, der an seinem Umfang eine Abreißkante 15 bildet, von der aus der Kegelteil 14 sich nach unten in die Kappe 5 herein verjüngt. Zwischen Kappe 5 und Anschlussteil 3 und dem doppelkegeligen Verdrängungskörper 6 entsteht eine ringförmige Mischkammer 16, in die durch den Anschlussteil 3 hindurch Zuführbohrungen 17 für das gasförmige Medium münden, das im Sinn der Pfeile 18 durch das strichpunktierte Rohr oder auf andere Weise zugeführt wird. Die Innenwände der Mischkammer 16 verlaufen dabei in etwa parallel zu der Kontur des Verdrängungskörpers 6.The displacement body 6 consists of a rotationally symmetrical Bicone, the tip 8 facing away from the cap 5 Cone part 9 on the axis 10 of the nozzle head 1 and a central Zuführbohrung 11 is located, the liquid to be sprayed in mind of the arrow 12 is supplied under pressure. The cone part 9 then goes into an annular truncated cone portion 13 over, the slope opposite the axis 10 is flatter and merges into a cylindrical ring 21, the at its periphery forms a tear-off edge 15, from which the cone part 14 tapers down into the cap 5 in. Between Cap 5 and connector part 3 and the double-cone displacement body 6, an annular mixing chamber 16, in which through the Connecting part 3 through feed holes 17 for the gaseous medium lead, in the sense of arrows 18 through the dash-dotted tube or otherwise supplied. The inner walls of the mixing chamber 16 run approximately parallel to the contour of the displacement body 6th

Es ist zu erkennen, dass die Zuführbohrungen 17 in etwa parallel zur Zuführbohrung 11 für die Flüssigkeit verlaufen und in einem Bereich der Mischkammer 16 münden, der noch vor der Abreißkante 15 liegt.It can be seen that the feed bores 17 are approximately parallel to the Feed bore 11 extend for the liquid and in a range of Mixing chamber 16 open, which is still in front of the tear-off edge 15.

In der Kappe 5 wiederum sind hinter der Abreißkante 15 Austrittsbohrungen 19 vorgesehen, die gleichmäßig auf dem Umfang der Kappe 5 verteilt sind. Der Austrittswinkel dieser Bohrungen 19, gemessen zur Achse 10 des Düsenkopfes 1, kann unterschiedlich gewählt sein. Dies gilt auch für die Anzahl der Bohrungen 19 und für ihren radialen Abstand von der zentralen Achse 10. Es wäre beispielsweise auch möglich, die Austrittsöffnungen näher an die Achse 10 heranzulegen und den Austrittswinkel zu ändern, wie das mit der Achse 20 angedeutet ist. In the cap 5, in turn, 15 exit holes are behind the tear-off 19 provided evenly on the circumference of the cap. 5 are distributed. The exit angle of these holes 19, measured to Axis 10 of the nozzle head 1, may be selected differently. This also applies to the number of holes 19 and their radial distance from the central axis 10. It would also be possible, for example, the Close the outlet openings closer to the axis 10 and the exit angle to change, as indicated by the axis 20.

Die Wirkungsweise des neuen Düsenkopfes ist wie folgt:The operation of the new nozzle head is as follows:

Die im Sinn des Pfeiles 12 eintretende Flüssigkeit tritt als Vollstrahl in die Mischkammer 16 ein und trifft dabei auf die Spitze 8 des Kegels 9 auf. Die Flüssigkeit wird dadurch gleichmäßig auf die Oberfläche des Kegels 9 verteilt und die Dicke des so entstehenden Flüssigkeitsfilmes nimmt mit zunehmendem Durchmesser des Kegels 9 ab. Im Bereich des Ringes 13 wird der Flüssigkeitsfilm in eine Richtung umgelenkt, die nahezu senkrecht zu der Zuführrichtung der Bohrungen 17 ist. Der Flüssigkeitsfilm wird daher von dem zuströmenden gasförmigen Medium in die Mischkammer hineingerissen, zu feinen Tröpfchen gleichmäßig verteilt und dann als Sprühstrahlen durch die Öffnungen 19 nach außen geführt. Dabei beruht die Wirkungsweise der feinen Verteilung der Flüssigkeit in der zugeführten Luft auf der Aufteilung eines Flüssigkeitsstrahles in einen ringförmigen Flüssigkeitsfilm, der in besonders wirkungsvoller Weise von quer dazu auftreffenden Luftstrahlen mitgenommen wird. Wie zu erkennen ist, ist der Raumbedarf eines so gestalteten Sprühkopfes verhältnismäßig gering.The entering in the direction of arrow 12 liquid enters as a full jet the mixing chamber 16 and strikes the top 8 of the cone. 9 on. The liquid is thereby evenly on the surface of the 9 cone distributed and the thickness of the resulting liquid film decreases with increasing diameter of the cone 9. In the area of Ringes 13, the liquid film is deflected in a direction that almost perpendicular to the feed direction of the bores 17. The liquid film is therefore due to the incoming gaseous medium in entrained the mixing chamber, evenly distributed to fine droplets and then as sprays through the openings 19 to the outside guided. The mode of action of the fine distribution of the liquid is based on this in the supplied air on the division of a liquid jet in an annular liquid film, which is particularly effective Way is taken by transversely incident air jets. As can be seen, the space requirement of such a spray head relatively low.

Im Ausführungsbeispiel ist als Verdrängungskörper ein rotationssymmetrischer Kegel gezeigt. Möglich ist es allerdings auch, einen pyramidenförmigen Verdrängungskörper vorzusehen, der ebenfalls ausgehend von einer Verteilspitze die Flüssigkeit in einen Film aufteilt, der dann vom zuströmenden gasförmigen Medium zerteilt wird.In the exemplary embodiment, the displacement body is a rotationally symmetrical Cone shown. It is also possible, however, a pyramidal Provide displacement body, which also starting from a distribution tip divides the liquid into a film, which is then removed from the infused gaseous medium is divided.

Claims (9)

Zweistoffsprühdüse mit einer in einem Gehäuse vor einer Austrittsöffnung angeordneten Mischkammer (16) in die Zufuhrkanäle (11, 17) für ein flüssiges und ein gasförmiges Medium münden und in der ein Prallkörper (6) vorgesehen ist, auf den der Flüssigkeitsstrahl auftrifft, dadurch gekennzeichnet, dass der Prallkörper als ein koaxial zu dem Flüssigkeitsstrahl ausgerichteter, sich in Strömungsrichtung bis zu einer Abreißkante (15) erweiternder Verdrängungskörper (6) mit einer gegen die Strömung der Flüssigkeit gerichteten Spitze (8) ausgebildet ist, und dass die Zufuhrkanäle (17) für das gasförmige Medium in den den erweiterten Bereich des Verdrängungskörpers (6) umgebenden Teil der Mischkammer (16) münden.Two-component spray nozzle with a mixing chamber (16) arranged in a housing in front of an outlet opening into the supply channels (11, 17) for a liquid and a gaseous medium and in which a baffle member (6) is provided on which the liquid jet impinges, characterized in that the baffle body is designed as a displacement body (6) aligned coaxially with the liquid jet and widening in the flow direction as far as a tear - off edge (15) with a tip (8) directed against the flow of the liquid, and in that the feed channels (17) for the gaseous medium in the extended portion of the displacement body (6) surrounding part of the mixing chamber (16) open. Zweistoffsprühdüse nach Anspruch 1, dadurch gekennzeichnet, dass die Zufuhrkanäle (17) für das gasförmige Medium in Strömungsrichtung vor der Abreißkante (15) münden.Zweistoffsprühdüse according to claim 1, characterized in that the supply channels (17) for the gaseous medium in the flow direction in front of the tear-off edge (15) open. Zweistoffsprühdüse nach Anspruch 1, dadurch gekennzeichnet, dass die Zufuhrkanäle (17) für das gasförmige Medium in etwa parallel zur Strömungsrichtung des Flüssigkeitsstrahles verlaufen.Zweistoffsprühdüse according to claim 1, characterized in that the supply channels (17) extend for the gaseous medium in approximately parallel to the flow direction of the liquid jet. Zweistoffsprühdüse nach Anspruch 1, dadurch gekennzeichnet, dass die Innenwand des Mischkammer (16) in etwa parallel zu der Kontur des Verdrängungskörpers (6) verläuft.Zweistoffsprühdüse according to claim 1, characterized in that the inner wall of the mixing chamber (16) extends approximately parallel to the contour of the displacement body (6). Zweistoffsprühdüse nach Anspruch 1, dadurch gekennzeichnet, dass der Verdrängungskörper (6) als eine Pyramide ausgebildet ist. Zweistoffsprühdüse according to claim 1, characterized in that the displacement body (6) is designed as a pyramid. Zweistoffsprühdüse nach Anspruch 1, dadurch gekennzeichnet, dass der Verdrängungskörper (6) als Kegel (9) ausgebildet ist.Zweistoffsprühdüse according to claim 1, characterized in that the displacement body (6) is designed as a cone (9). Zweistoffsprühdüse nach Anspruch 6, dadurch gekennzeichnet, dass der Verdrängungskörper (6) als Doppelkegel (9, 14) ausgebildet ist, der sich in Strömungsrichtung (12) bis zur Abreißkante (15) erweitert und dann wieder verjüngt.Zweistoffsprühdüse according to claim 6, characterized in that the displacement body (6) as a double cone (9, 14) is formed, which widens in the flow direction (12) to the tear-off edge (15) and then rejuvenated. Zweistoffsprühdüse nach Anspruch 1, dadurch gekennzeichnet, dass die Austrittsöffnung aus mehreren hinter dem Bereich der Abreißkante (15) des Verdrängungskörpers (6) angeordneten Austrittsbohrungen (19) besteht.Zweistoffsprühdüse according to claim 1, characterized in that the outlet opening consists of a plurality of behind the region of the tear-off edge (15) of the displacement body (6) arranged outlet bores (19). Zweistoffsprühdüse nach Anspruch 8, dadurch gekennzeichnet, dass die Lage, die Anzahl und der Austrittswinkel der Austrittsbohrungen (19, 20) in Abhängigkeit vom gewünschten Sprühwinkel und Sprühstrahl gewählt ist.Zweistoffsprühdüse according to claim 8, characterized in that the position, the number and the exit angle of the outlet bores (19, 20) is selected depending on the desired spray angle and spray.
EP04006996A 2003-04-24 2004-03-24 Two-fluid spray nozzle Expired - Lifetime EP1470864B1 (en)

Priority Applications (1)

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DE10319582 2003-04-24
DE10319582A DE10319582B4 (en) 2003-04-24 2003-04-24 Binary spray nozzle

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EP1470864A2 true EP1470864A2 (en) 2004-10-27
EP1470864A3 EP1470864A3 (en) 2006-06-14
EP1470864B1 EP1470864B1 (en) 2010-12-22

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US (1) US6969014B2 (en)
EP (1) EP1470864B1 (en)
JP (1) JP4754785B2 (en)
AT (1) ATE492349T1 (en)
DE (2) DE10319582B4 (en)
DK (1) DK1470864T3 (en)
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PL (1) PL1470864T3 (en)

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CN105269393A (en) * 2015-12-02 2016-01-27 四川明日宇航工业有限责任公司 Oil and gas mixed injection milling and lubricating system for high-strength steel aeronautic structure parts
CN105345592A (en) * 2015-12-02 2016-02-24 四川明日宇航工业有限责任公司 Oil and gas mixed spraying, milling and lubricating system for aluminum alloy aerospace structure members

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CN105689177A (en) 2010-04-02 2016-06-22 斯得-莱特工业有限责任公司 Air aspiration device
EP3015173B1 (en) 2014-10-29 2017-09-06 PNR Italia S.r.l. Internal mix air atomizing spray nozzle
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CN105345592A (en) * 2015-12-02 2016-02-24 四川明日宇航工业有限责任公司 Oil and gas mixed spraying, milling and lubricating system for aluminum alloy aerospace structure members
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Also Published As

Publication number Publication date
ATE492349T1 (en) 2011-01-15
DE10319582A1 (en) 2004-12-02
DE502004012015D1 (en) 2011-02-03
DK1470864T3 (en) 2011-04-11
ES2355821T3 (en) 2011-03-31
JP4754785B2 (en) 2011-08-24
PL1470864T3 (en) 2011-05-31
EP1470864B1 (en) 2010-12-22
DE10319582B4 (en) 2007-03-22
US6969014B2 (en) 2005-11-29
US20040262429A1 (en) 2004-12-30
JP2004322087A (en) 2004-11-18
EP1470864A3 (en) 2006-06-14

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