EP0434980A2 - Device for spraying liquid or solid materials, preferably melted metals - Google Patents
Device for spraying liquid or solid materials, preferably melted metals Download PDFInfo
- Publication number
- EP0434980A2 EP0434980A2 EP90122347A EP90122347A EP0434980A2 EP 0434980 A2 EP0434980 A2 EP 0434980A2 EP 90122347 A EP90122347 A EP 90122347A EP 90122347 A EP90122347 A EP 90122347A EP 0434980 A2 EP0434980 A2 EP 0434980A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- atomizing
- nozzles
- fluid
- jet
- fluid jet
- 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
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 5
- 239000002184 metal Substances 0.000 title claims abstract description 5
- 239000011344 liquid material Substances 0.000 title abstract 2
- 239000011343 solid material Substances 0.000 title abstract 2
- 150000002739 metals Chemical class 0.000 title 1
- 238000005507 spraying Methods 0.000 title 1
- 239000012530 fluid Substances 0.000 claims abstract description 51
- 238000002604 ultrasonography Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 5
- 230000000295 complement effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- 210000001015 abdomen Anatomy 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- QGQFOJGMPGJJGG-UHFFFAOYSA-K [B+3].[O-]N=O.[O-]N=O.[O-]N=O Chemical group [B+3].[O-]N=O.[O-]N=O.[O-]N=O QGQFOJGMPGJJGG-UHFFFAOYSA-K 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- -1 steam Substances 0.000 description 1
- XOUPWBJVJFQSLK-UHFFFAOYSA-J titanium(4+);tetranitrite Chemical compound [Ti+4].[O-]N=O.[O-]N=O.[O-]N=O.[O-]N=O XOUPWBJVJFQSLK-UHFFFAOYSA-J 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
Definitions
- the invention relates to a device for atomizing at least one jet of a liquid or solid substance, preferably molten metal, according to the preamble of patent claim 1.
- the invention is based on a known device (EP-A1 0 308 933), in which the radiating sonotrode surfaces are arranged in the tapered section of a nozzle, through which an inert or reaction gas is introduced into the ultrasound field between the sonotrode surfaces. This gas flow promotes the atomization process and allows targeted particle transport out of the atomization area.
- the combustion air can be blown radially through slot or ring nozzles into the pressure bellies or nodes of the standing wave of an ultrasonic field which is generated between a sonotrode and a reflector.
- the invention has for its object to design the device of the type described in such a way that the atomization throughput is significantly increased and the atomization process can be better regulated.
- the atomizing fluid jet which is usually liquid
- the additional fluid which is usually gaseous
- the throughput of additional fluid through the nozzles can be set separately from the atomizing fluid.
- a plurality of atomizing and additional fluid jets are preferably introduced.
- the throughput of atomizing fluid should not exceed an upper limit, since the jet then breaks through in the atomizing area and reduces the atomizing power.
- additional fluid streams are introduced into the atomization areas in the pressure node simultaneously and in addition to the actual atomizing fluid jet, the atomizing fluid mass throughput can be increased significantly.
- Liquids in particular melts
- solid substances minerals, powders, foams
- Gas, steam, mist, liquid, powder or the like can be used as the additional fluid.
- FIG. 1 shows the device known from EP-A 0 308 933, in which an ultrasound standing field 3 with pressure nodes and pressure bellies is generated between two sonotrodes 1 and 2.
- the openings of melting crucibles 4 open into the node areas, from which one or more jets of melt emerge and are atomized in the ultrasound field of a gas passed between the sonotrode surfaces 5, 6.
- the sonotrode 2 belongs to an ultrasonic oscillator 10, which is shown in FIG. 2, which has a booster 11 and a converter 12.
- a housing 15 surrounding the converter 12 and the booster 11 is fastened in a pressure-tight manner.
- the housing 15 is arranged via a sleeve 17, which is also provided with seals 16, in an outer housing 18 which forms the passage through a wall 19 which separates the outer space 20 from the pressure space 21, in which the atomization is carried out.
- the cable 22 is introduced into the converter 12 via the housing 18.
- the housing 15 can be adjusted axially via an adjusting device 23.
- FIG. 3 shows an end view of the sonotrode surface 5 of the sonotrode 1.
- the atomizing fluid nozzles 25 there are several individual additional fluid nozzles 26 which are connected to pressure medium sources (not shown).
- the nozzles 25 and 26 are directed radially and offset on the circumference. Fluid flows are directed via the nozzles 25, 26 specifically onto the longitudinal axis 7 of the oscillator arrangement.
- the introduction into the pressure node areas of the ultrasound field is preferably carried out, as can also be seen from FIG. 5.
- the nozzles are arranged alternately, so that in addition to an atomizing fluid jet from the nozzle 25, an additional fluid jet emerges from the nozzle 26.
- FIG. 4 shows ring nozzles 28 in which the atomizing fluid jet emerges from a central opening 29 and the additional fluid jet emerges from an annular opening 30 which surrounds the central nozzle in an annular manner. All of these nozzles are each directed into a pressure node area of the standing wave.
- FIG. 5 shows the arrangement of several such individual or ring nozzles 25, 26, 28 shown in FIG. 3 or 4 for introducing atomizing and additional fluid flows into the individual pressure node areas of the standing shaft.
- a plurality of nozzles 25, 26, 28 are again provided for each pressure node area, as shown in FIG. 3 or 4.
- FIG. 6 shows a flat nozzle 35 with inlets 36 for atomizing fluid and inlets 37 for additional gas.
- the additional gas jet enters the atomizing area of the ultrasonic wave in a targeted manner on both sides of the atomizing gas jet emerging in the center.
- FIG. 7 shows the end view 5 of a rectangular sonotrode 1, for which the flat nozzle 35 is particularly suitable.
- the atomizing performance can also be increased with such a large-area sonotrode.
- FIG. 8 shows the arrangement in which a plurality of nozzles 25, 26 or ring nozzles 28 arranged in rows next to one another are provided in the ultrasound field generated by a large-area, rectangular sonotrode 1, each of which is arranged in the planes of the pressure node areas.
- FIG. 9 shows a further measure to improve the atomization performance.
- the sonotrode surfaces 5 and 6 are concave, so that the energy in the node of the ultrasonic standing wave is focused and thus the acoustic pressure is increased.
- the sonotrode radiation surfaces can also be coated in order to reduce wettability. This can be done, for example, by vapor deposition of boron nitrite, titanium nitrite or by chrome plating or anodizing, etc.
Landscapes
- Special Spraying Apparatus (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Zerstäuben mindestens eines Strahls eines flüssigen oder festen Stoffes, vorzugsweise geschmolzenen Metalls nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for atomizing at least one jet of a liquid or solid substance, preferably molten metal, according to the preamble of
Die Erfindung geht von einer bekannten Vorrichtung aus (EP-A1 0 308 933), bei der die abstrahlenden Sonotrodenflächen im Verjüngungsabschnitt einer Düse angeordnet sind, durch die ein Inert- oder Reaktionsgas in das Ultraschallfeld zwischen den Sonotrodenflächen eingeleitet wird. Dieser Gasstrom fördert den Zerstäubungsprozeß und erlaubt einen gezielten Partikeltransport aus dem Zerstäubungsbereich heraus.The invention is based on a known device (EP-A1 0 308 933), in which the radiating sonotrode surfaces are arranged in the tapered section of a nozzle, through which an inert or reaction gas is introduced into the ultrasound field between the sonotrode surfaces. This gas flow promotes the atomization process and allows targeted particle transport out of the atomization area.
Bei einer bekannten Vorrichtung (DE-C2 28 42 232) zum Zerstäuben von Kohlestaub für Heizungszwecke kann die Verbrennungsluft radial durch Schlitz- oder Ringdüsen in die Druckbäuche oder Knoten der stehenden Welle eines Ultraschallfeldes eingeblasen werden, das zwischen einer Sonotrode und einem Reflektor erzeugt wird.In a known device (DE-C2 28 42 232) for atomizing coal dust for heating purposes, the combustion air can be blown radially through slot or ring nozzles into the pressure bellies or nodes of the standing wave of an ultrasonic field which is generated between a sonotrode and a reflector.
Demgegenüber liegt der Erfindung die Aufgabe zugrunde, die Vorrichtung der eingangs geschilderten Art so auszubilden, daß der Zerstäubungsdurchsatz deutlich erhöht wird und der Zerstäubungsprozeß besser geregelt werden kann.In contrast, the invention has for its object to design the device of the type described in such a way that the atomization throughput is significantly increased and the atomization process can be better regulated.
Die genannte Aufgabe ist erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst.The stated object is achieved according to the invention by the features of
Erfindungsgemäß werden nicht nur der Zerstäubungsfluidstrahl, der im Regelfall flüssig ist, sondern auch das im Regelfall gasförmige Zusatzfluid über Düsen gezielt in die Druckknotenbereiche der stehenden Ultraschallwelle eingebracht. Der Durchsatz an Zusatzfluid durch die Düsen ist getrennt zum Zerstäubungsfluid einstellbar. Vorzugsweise werden mehrere Zerstäubungs- und Zusatzfluidstrahlen eingeleitet. Der Durchsatz an Zerstäubungsfluid soll einen oberen Grenzwert nicht überschreiten, da der Strahl dann im Zerstäubungsbereich durchschlägt und die Zerstäubungsleistung verkleinert. Wenn aber Zusatzfluidströme gleichzeitig und zusätzlich zum eigentlichen Zerstäubungsfluidstrahl in die Zerstäubungsbereiche im Druckknoten eingeleitet werden, so läßt sich der Zerstäubungs-Fluidmassendurchsatz wesentlich erhöhen. Dies läßt sich auf eine lokale Erhöhung der Gasdichte (Staudruck) im Zerstäubungsbereich der Druckknoten sowie durch die Turbulenzerhöhung im Zerstäubungsbereich infolge der gezielten Zusatzfluidmassenstromeinbringung zurückführen. Durch die gezielte und lokal eingegrenzte Einbringung der Zerstäubungsfluid-/Zusatzfluidströme wird eine Zweiphasen-Zerstäubung erzielt. Im Zerstäubungsbereich erfolgt zusätzlich zur Ultraschalleinwirkung ein Impulsübertrag von Seiten des unterstützenden Zusatzgases und damit eine wesentliche Leistungsverbesserung des Zerstäubungsprozesses. Ferner ergibt sich eine Verschiebung des Tropfengrößenspektrums bei der Zerstäubung zu kleineren Tropfen hin. Ferner ist die Regelmöglichkeit des Zerstäubungsprozesses durch Veränderung des Zusatzgasstromes verbessert. Im Zerstäubungsbereich wird eine größere Kühlwirkung und damit höhere Abkühlgeschwindigkeit erzielt und es erfolgt ein gezielter Partikeltransport aus dem Zerstäubungsbereich heraus.According to the invention, not only the atomizing fluid jet, which is usually liquid, but also the additional fluid, which is usually gaseous, are introduced into the pressure node areas of the standing ultrasonic wave in a targeted manner. The throughput of additional fluid through the nozzles can be set separately from the atomizing fluid. A plurality of atomizing and additional fluid jets are preferably introduced. The throughput of atomizing fluid should not exceed an upper limit, since the jet then breaks through in the atomizing area and reduces the atomizing power. However, if additional fluid streams are introduced into the atomization areas in the pressure node simultaneously and in addition to the actual atomizing fluid jet, the atomizing fluid mass throughput can be increased significantly. This can be attributed to a local increase in the gas density (dynamic pressure) in the atomization area of the pressure nodes and to the increase in turbulence in the atomization area as a result of the targeted introduction of additional fluid mass flow. A two-phase atomization is achieved through the targeted and locally limited introduction of the atomizing fluid / additional fluid streams. In the atomization area, in addition to the effect of ultrasound, there is a pulse transmission on the part of the supporting additional gas and thus a significant improvement in the performance of the atomization process. There is also a shift in the droplet size spectrum during atomization towards smaller droplets. Furthermore, the control possibility of the atomization process is improved by changing the additional gas flow. A greater cooling effect and thus a higher cooling rate are achieved in the atomization area and there is a targeted transport of particles out of the atomization area.
Als Zerstäubungsfluid können Flüssigkeiten (insbesondere Schmelzen) und feste Stoffe (Minerale, Pulver, Schäume) Verwendung finden.Als Zusatzfluid kann Gas, Dampf, Nebel, Flüssigkeit, Pulver oder dergleichen Verwendung finden.Liquids (in particular melts) and solid substances (minerals, powders, foams) can be used as the atomizing fluid. Gas, steam, mist, liquid, powder or the like can be used as the additional fluid.
Vorteilhafte Weiterbildungen sind in den Unteransprüchen gekennzeichnet.Advantageous further developments are characterized in the subclaims.
Ausführungsbeispiele der Erfindung sind nachstehend anhand der Zeichnung näher erläutert. Es zeigen:
- Fig. 1
- eine Seitenansicht einer Vorrichtung zum Zer stäuben einer Schmelze in wenigstens drei Tiegeldüsen in drei Druckknotenbereichen
- Fig. 2
- einen Schnitt durch einen der Ultraschall schwinger,
- Fig. 3
- eine Anordnung mit in einem Druckknotenbereich liegenden Einzeldüsen zum Einleiten von Zerstäubungsfluid und Zusatzfluid,
- Fig. 4
- eine Anordnung mit in einem Druckknotenbereich liegenden Ringdüsen für Zerstäubungsfluid und Zusatzfluid,
- Fig. 5
- eine Seitenansicht der
Figur 4, - Fig. 6
- eine Seitenansicht mit einer Flachdüse in einem Drucknotenbereich
- Fig. 7
- eine Stirnansicht der Anordnung in Fig. 6
- Fig. 8
- eine Stirnansicht einer Düsenanordnung nach Fig. 3 oder Fig. 4 für eine rechteckige Sonotrode und
- Fig. 9
- eine Seitenansicht mit konkaven Sonotroden.
- Fig. 1
- a side view of a device for Zer dusting a melt in at least three crucible nozzles in three pressure node areas
- Fig. 2
- a section through one of the ultrasonic transducers,
- Fig. 3
- an arrangement with individual nozzles located in a pressure node area for introducing atomizing fluid and additional fluid,
- Fig. 4
- an arrangement with ring nozzles for atomizing fluid and additional fluid located in a pressure node area,
- Fig. 5
- 3 shows a side view of FIG. 4,
- Fig. 6
- a side view with a flat nozzle in a printing area
- Fig. 7
- 6 shows an end view of the arrangement in FIG. 6
- Fig. 8
- an end view of a nozzle arrangement according to Fig. 3 or Fig. 4 for a rectangular sonotrode and
- Fig. 9
- a side view with concave sonotrodes.
Figur 1 zeigt die aus der EP-A 0 308 933 bekannte Vorrichtung, bei der zwischen zwei Sonotroden 1 und 2 ein Ultraschall-Stehfeld 3 mit Druckknoten und Druckbäuchen erzeugt wird. In die Knotenbereiche münden die Öffnungen von Schmelztiegeln 4, aus denen je ein oder mehrere Strahlen Schmelze austreten und in dem Ultraschallfeld eines zwischen den Sonotrodenflächen 5, 6 durchgeleiteten Gases zerstäubt werden.FIG. 1 shows the device known from EP-A 0 308 933, in which an
Die Sonotrode 2 gehört zu einem Ultraschallschwinger 10, der in Fig. 2 dargestellt ist, der einen Booster 11 und einen Konverter 12 aufweist. An einer Knotenstelle 14 des Boosters 11 ist ein den Konverter 12 und den Booster 11 umschließendes Gehäuse 15 druckdicht befestigt. Das Gehäuse 15 ist über eine ebenfalls mit Dichtungen 16 versehene Hülse 17 in einem Außengehäuse 18 angeordnet, das die Durchführung durch eine Wandung 19 bildet, die den Außenraum 20 vom Druckraum 21 trennt, in dem die Zerstäubung vorgenommen wird. Über das Gehäuse 18 erfolgt die Einführung des Kabels 22 an den Konverter 12. Das Gehäuse 15 ist über eine Verstelleinrichtung 23 axial einstellbar.The
In Figur 3 ist eine Stirnansicht der Sonotrodenfläche 5 der Sonotrode 1 dargestellt. Neben den Zerstäubungsfluid-Düsen 25 finden sich mehrere einzelne Zusatzfluid-Düsen 26, die an nicht dargestellte Druckmittelquellen für angeschlossen sind. Die Düsen 25 und 26 sind radial gerichtet und am Umfang versetzt angeordnet. Über die Düsen 25, 26 werden Fluidströme gezielt auf die Längsachse 7 der Schwingeranordnung geleitet. Vorzugsweise erfolgt die Einleitung in die Druckknotenbereiche des Ultraschallfeldes, wie dies auch aus Figur 5 hervorgeht. In Figur 3 sind die Düsen abwechselnd angeordnet, so daß jeweils neben einem Zerstäubungsfluidstrahl aus der Düse 25 ein Zusatzfluidstrahl aus der Düse 26 austritt. Durch die dargestellte kombinierte Düsenanordnung, die über den Umfang der Sonotrodenanordnung fortgesetzt werden kann läßt sich der Fluidmassendurchsatz wesentlich erhöhen und damit die Zerstäubungsleistung vergrößern.FIG. 3 shows an end view of the
In Figur 4 sind Ringdüsen 28 dargestellt, bei denen der Zerstäubungsfluidstrahl aus einer zentralen Öffnung 29 und der Zusatzfluidstrahl aus einer ringförmigen Öffnung 30 austritt, welche die mittige Düse ringförmig umschließt. Alle diese Düsen sind in jeweils einen Druckknotenbereich der Stehwelle gerichtet.FIG. 4 shows
Figur 5 zeigt die Anordnung mehrerer solcher in Figur 3 oder 4 dargestellten Einzel- oder Ringdüsen 25,26,28 zum Einleiten von Zerstäubungs- und Zusatzfluidströmen in die einzelnen Druckknotenbereiche der Stehwelle. Für jeden Druckknotenbereich sind wiederum mehrere Düsen 25,26,28 vorgesehen, wie in Figur 3 oder 4 dargestellt ist.FIG. 5 shows the arrangement of several such individual or
In Figur 6 ist eine Flachdüse 35 mit Einleitungen 36 für Zerstäubungsfluid und Einleitungen 37 für Zusatzgas dargestellt. Der Zusatzgasstrahl tritt beidseitig des mittig austretenden Zerstäubungsgasstrahls gezielt in den Zerstäubungsbereich der Ultraschallwelle ein.FIG. 6 shows a
Figur 7 zeigt die Stirnansicht 5 einer rechteckigen Sonotrode 1, für die die Flachdüse 35 besonders geeignet ist. Mit einer derartigen großflächigen Sonotrode läßt sich ebenfalls die Zerstäubungsleistung steigern. Dies trifft auch bei der Anordnung in Figur 8 zu, bei der in das von einer großflächigen, rechteckigen Sonotrode 1 erzeugte Ultraschallfeld mehrere in Reihen nebeneinander angeordnete Düsen 25, 26 beziehungsweise Ringdüsen 28 vorgesehen sind, die jeweils in den Ebenen der Druckknotenbereiche angeordnet sind.FIG. 7 shows the
Alle dargestellten Anordnungen können auch in einem Druckbehälter untergebracht werden, in dem eine Verdichtung der eingeleiteten Gasströme erfolgt, so daß die Energieübertragung in dem verdichteten Medium vergroßert wird.All of the arrangements shown can also be accommodated in a pressure vessel in which a compression of the introduced gas flows takes place so that the energy transfer in the compressed medium is increased.
Figur 9 zeigt eine weitere Maßnahme zur Verbesserung der Zerstäubungsleistung. Die Sonotrodenflächen 5 beziehungsweise 6 sind konkav ausgeführt, so daß die Energie im Knoten der Ultraschall-Stehwelle fokussiert und damit der Schallwechseldruck erhöht wird. Außerdem lassen sich die Sonotroden-Abstrahlflächen beschichten, um die Benetzbarkeit zu mindern. Dies kann beispielsweise durch Aufdampfen von BorNitrit, Titan-Nitrit oder durch Verchromen oder Eloxieren etc. erfolgen.FIG. 9 shows a further measure to improve the atomization performance. The sonotrode surfaces 5 and 6 are concave, so that the energy in the node of the ultrasonic standing wave is focused and thus the acoustic pressure is increased. The sonotrode radiation surfaces can also be coated in order to reduce wettability. This can be done, for example, by vapor deposition of boron nitrite, titanium nitrite or by chrome plating or anodizing, etc.
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3993178 | 1989-11-27 | ||
DE3939178A DE3939178A1 (en) | 1989-11-27 | 1989-11-27 | DEVICE FOR SPRAYING LIQUID AND SOLID MATERIALS, PREFERABLY MELTED METALS |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0434980A2 true EP0434980A2 (en) | 1991-07-03 |
EP0434980A3 EP0434980A3 (en) | 1991-12-04 |
EP0434980B1 EP0434980B1 (en) | 1995-05-31 |
Family
ID=6394275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90122347A Expired - Lifetime EP0434980B1 (en) | 1989-11-27 | 1990-11-22 | Device for spraying liquid or solid materials, preferably melted metals |
Country Status (5)
Country | Link |
---|---|
US (1) | US5122047A (en) |
EP (1) | EP0434980B1 (en) |
JP (1) | JPH03242257A (en) |
AT (1) | ATE123239T1 (en) |
DE (2) | DE3939178A1 (en) |
Cited By (1)
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WO1993021353A1 (en) * | 1992-04-10 | 1993-10-28 | Sprayforming Developments Limited | Vibrating ring motor for feeding particular substances |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5176874A (en) * | 1991-11-05 | 1993-01-05 | General Electric Company | Controlled process for the production of a spray of atomized metal droplets |
US5794861A (en) * | 1995-10-05 | 1998-08-18 | D & R Recyclers, Inc. | Process and apparatus for separating components of fragmented vehicle tires |
DE10245324A1 (en) * | 2002-09-27 | 2004-04-08 | Abb Patent Gmbh | Method for atomizing paint coating materials, using an ultrasonic generator and reflector with a paint delivery tube having a deflector to prevent paint drops moving up the tube |
DE10245326A1 (en) * | 2002-09-27 | 2004-04-08 | Abb Patent Gmbh | A method for atomizing paint coating materials has an ultrasonic generator and reflector setting up standing waves maximized at the center |
DE10252437A1 (en) * | 2002-11-12 | 2004-05-27 | Abb Patent Gmbh | Ultrasonic standing wave atomizer appliance for coating components e.g. in the motor vehicle industry has paint feeder with paint discharge pipe sections in area of selected maximum of sound particle velocity of vertical ultrasonic field |
JP2004290877A (en) * | 2003-03-27 | 2004-10-21 | Toyota Motor Corp | Rotation atomizing coating apparatus |
DE10327429A1 (en) * | 2003-06-18 | 2005-01-05 | Abb Patent Gmbh | Ultrasonic stationary wave atomizer for generating varnish spray for painting workpiece, has varnish nozzle with varnish disk positioned in space formed between sonotrode and reflector, atomizing varnish from the nozzle |
DE10327431A1 (en) * | 2003-06-18 | 2005-01-05 | Abb Patent Gmbh | Ultrasonic standing-wave atomizer |
DE10327430A1 (en) | 2003-06-18 | 2005-01-05 | Abb Patent Gmbh | Ultrasonic standing-wave atomizer |
US8893992B2 (en) * | 2012-04-19 | 2014-11-25 | General Electric Company | System and method for pulverizing a substance |
CN109622980A (en) * | 2019-01-28 | 2019-04-16 | 哈尔滨工业大学 | A kind of contactless powder by atomization device and method of molten metal ultrasonic standing wave |
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EP0308600A1 (en) * | 1987-09-25 | 1989-03-29 | Battelle-Institut e.V. | Apparatus for the ultrasonic atomization of a fluid |
EP0361396A1 (en) * | 1988-09-27 | 1990-04-04 | Europäische Atomgemeinschaft (Euratom) | Process and apparatus for preparing an amorphous powder of a ceramic or metallic material |
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US3274642A (en) * | 1965-05-12 | 1966-09-27 | Armour & Co | Apparatus for prilling ammonium nitrate |
GB1272229A (en) * | 1968-11-27 | 1972-04-26 | British Iron Steel Research | Improvements in and relating to the treatment of molten material |
US4153201A (en) * | 1976-11-08 | 1979-05-08 | Sono-Tek Corporation | Transducer assembly, ultrasonic atomizer and fuel burner |
DE2842232C2 (en) * | 1978-09-28 | 1985-04-18 | Battelle-Institut E.V., 6000 Frankfurt | Method and device for atomizing liquids, suspensions and emulsions, agglomerated dusts or powders and mixtures thereof |
CA1159356A (en) * | 1979-10-25 | 1983-12-27 | Kurt Skoog | Method and device for producing microdroplets of fluid |
DE3108481A1 (en) * | 1980-04-17 | 1982-02-04 | Hauni-Werke Körber & Co KG, 2050 Hamburg | Device for applying softener liquid onto a moving web of fabric |
DE3407059A1 (en) * | 1984-02-27 | 1985-08-29 | Siemens AG, 1000 Berlin und 8000 München | Process for the production of reacted raw materials for electroceramics |
DE3713253A1 (en) * | 1986-07-23 | 1988-02-04 | Bosch Gmbh Robert | ULTRASONIC SPRAYER |
DE3735787A1 (en) * | 1987-09-22 | 1989-03-30 | Stiftung Inst Fuer Werkstoffte | METHOD AND DEVICE FOR SPRAYING AT LEAST ONE JET OF A LIQUID, PREFERABLY MOLTED METAL |
-
1989
- 1989-11-27 DE DE3939178A patent/DE3939178A1/en not_active Withdrawn
-
1990
- 1990-11-22 EP EP90122347A patent/EP0434980B1/en not_active Expired - Lifetime
- 1990-11-22 AT AT90122347T patent/ATE123239T1/en not_active IP Right Cessation
- 1990-11-22 DE DE59009180T patent/DE59009180D1/en not_active Expired - Fee Related
- 1990-11-26 JP JP2318148A patent/JPH03242257A/en active Pending
- 1990-11-27 US US07/618,678 patent/US5122047A/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0308600A1 (en) * | 1987-09-25 | 1989-03-29 | Battelle-Institut e.V. | Apparatus for the ultrasonic atomization of a fluid |
EP0361396A1 (en) * | 1988-09-27 | 1990-04-04 | Europäische Atomgemeinschaft (Euratom) | Process and apparatus for preparing an amorphous powder of a ceramic or metallic material |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993021353A1 (en) * | 1992-04-10 | 1993-10-28 | Sprayforming Developments Limited | Vibrating ring motor for feeding particular substances |
Also Published As
Publication number | Publication date |
---|---|
EP0434980A3 (en) | 1991-12-04 |
JPH03242257A (en) | 1991-10-29 |
DE59009180D1 (en) | 1995-07-06 |
ATE123239T1 (en) | 1995-06-15 |
US5122047A (en) | 1992-06-16 |
EP0434980B1 (en) | 1995-05-31 |
DE3939178A1 (en) | 1991-05-29 |
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