EP3031531B1 - Liquid jet nozzle closure - Google Patents

Liquid jet nozzle closure Download PDF

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Publication number
EP3031531B1
EP3031531B1 EP15198624.7A EP15198624A EP3031531B1 EP 3031531 B1 EP3031531 B1 EP 3031531B1 EP 15198624 A EP15198624 A EP 15198624A EP 3031531 B1 EP3031531 B1 EP 3031531B1
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EP
European Patent Office
Prior art keywords
jet
housing
passage
guide sleeve
sleeve
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EP15198624.7A
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German (de)
French (fr)
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EP3031531A1 (en
Inventor
Willem Frederik Boode
Antonie Bijma
Richard Pauwels
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Aebi Schmidt Nederland BV
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Aebi Schmidt Nederland BV
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Priority to PL15198624T priority Critical patent/PL3031531T3/en
Publication of EP3031531A1 publication Critical patent/EP3031531A1/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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve

Definitions

  • jet nozzles serve to form a liquid jet. This is particularly indicated when the liquid from the nozzle to a target has relatively large distance to bridge, which typically goes hand in hand with the requirement of a relatively strong limitation of the spatial distribution (ie bundling) of the liquid leaving the nozzle.
  • liquid jet nozzles On a defined liquid flow rate matched liquid jet nozzles are known in various designs and in practical use.
  • the above-mentioned, generic liquid jet nozzles were designed with feed-controlled variable passage cross-section. These have - as liquid jet shut-off nozzles - in addition to a closure function by the passage cross-section is completely closed when the pre-pressure falls below a predetermined value, which for example, the unwanted emptying of supply lines is prevented.
  • a predetermined value which for example, the unwanted emptying of supply lines is prevented.
  • the GB 760972 discloses a spray nozzle, which is intended to effect even at relatively low pressures, a distribution of very fine droplets or a mist within a spray cone.
  • the nozzle is equipped with a vortex chamber, which is connected upstream of an annular Zerstäubigerblende.
  • the nozzle can be switched to a second operating mode in which a beam formation takes place. In this mode, the liquid flows around a Pelton beam shaped body and occurs at the downstream end portion into an axially adjustable tube which in the second mode of operation obstructs the flow path to the atomizer nozzle whereas in the first mode of operation (spray nozzle) it abuts against and obstructs the flow path thereabout. The amount of fluid flowing through one or the other flow path is adjusted manually.
  • the EP 2127755 A1 discloses an integrated valve having a flow guide, as it is in particular a nozzle vorzunch.
  • an element which can be displaced in a housing comprise a closure body and a flow straightener downstream of the flow direction. The element is acted upon by means of a spring such that the closure body is biased against a sealing seat.
  • the present invention has been made in the light of the above-mentioned prior art, to provide a liquid jet nozzle of the type mentioned, which is characterized by improved performance.
  • the aim is to improve the beam forming behavior.
  • a guide sleeve is provided with a relation to the cross section of the pre-pressure chamber lower, aligned for passage of the throttle sleeve passage.
  • liquid-jet sealing nozzles according to the invention superior to those known generic jet nozzles in which, as determined by the inventors, there is a disturbance of the jet formation associated with the installation position.
  • known generic liquid jet shutter nozzles in practice show the desired result with sufficient reliability only in certain mounting positions, especially in that the beam forming behavior is more than satisfactory in more or less downwardly directed beam direction, but in an installation situation in which the exit direction of As the jet of liquid becomes increasingly shallower, significantly worsened, this prior art drawback does not occur with liquid jet closure nozzles according to the present invention. These deliver consistently good jet formation results regardless of the installation situation.
  • a guide sleeve according to the present invention is present (only) if the passage of the guide sleeve is at least as long as thick.
  • the (cross) section of the admission pressure chamber is not (only) the annular surface of the throttle sleeve exposed to the admission pressure, but rather the (entire) cross section bounded by the housing, including the cross-sectional area occupied by internals such as in particular the jetform body ,
  • the cross-section (the cross-sectional area) of the passage of the guide sleeve is preferably 0.3 to 0.5 times the value of the cross-sectional area of the pre-pressure space, which - in the case of round contours - has a diameter ratio of the passage of the guide sleeve to the pre-compression space between about 0.55 and 0 , 7 corresponds.
  • the diameter of the passage of the guide sleeve is preferably 1.0 to 1.5 times, more preferably 1.1 to 1.3 times the value of the diameter of the passage of the throttle sleeve.
  • the guide sleeve is preferably placed so that its distance from the throttle sleeve, when it rests against the beam forming body, is not greater than 1.5 times the value of the diameter of the passage of the throttle sleeve. Particularly preferably, that distance is not greater than 1.2 times the value of the diameter of the passage of the throttle sleeve.
  • the throttle sleeve preferably extends to the outlet opening of the housing. It is, in other words, preferably on the housing adjacent to the latter Beam exit opening provided. This is favorable for a particularly compact construction.
  • the jet shaped body is received in a stationary manner in the housing.
  • it may be inseparably connected to the housing, e.g. be integrally molded with this.
  • guide sleeve is preferably a separate component inserted into the housing. Between the guide sleeve and the actual housing an annular space is preferably carried out, in which a spring means for the throttle sleeve forming coil spring is partially received. This allows a particularly compact design of the liquid jet closure nozzle.
  • the guide sleeve can also form an integral part of the housing.
  • liquid inlet be disposed opposite the jet exit orifice, i. the liquid jet shutter nozzles is flowed through in its longitudinal direction.
  • a diameter for example, that of the housing or the passages of throttle sleeve and guide sleeve reference is taken, then this is to be understood in a shape deviating from a circular shape, line or contour of the average diameter. This is determined as the diameter of a circle which has the same area as the shape, line or contour deviating from a circular shape.
  • the substantially tubular housing 1 has a liquid inlet 4 and a jet outlet opening 5. The latter is opposite to the liquid inlet 4, so that the housing is flowed through in its longitudinal direction.
  • the jet shaped body 2 is arranged in a stationary manner in the housing 1 between the liquid inlet 5 and the jet outlet opening 5. It is supported on the housing 1 (in a pre-pressure chamber 6 of the housing 1 communicating with the liquid inlet 4) by way of a plurality of ribs 8 in such a way that flow around the jet shaped body 2 is possible.
  • the jet shaped body 2 has a conically tapered blind hole 9 on the inflow side and a conical region 10 on the outflow side with a tip 11 pointing in the direction of the jet outlet opening 5 of the housing 1. Between the cone region 10 of the jet shaped body 2 and the tubular housing 1, there is an annular space 12 with a cross-sectional area which increases in the direction of flow D.
  • throttle sleeve 3 is (in the longitudinal direction of the housing 1) relative to the housing 1 (and thus also the fixed thereto arranged jet-shaped body 2) displaceable, so that it forms a throttle slide.
  • the throttle sleeve 3 has a central passage 13 which cooperates with the cone region 10 of the jet shaped body 2 in the sense that it defines an annular passage cross-section 14 together with it.
  • the surface of the annular passage cross section 14 is variable; it depends on the (axial) position of the throttle sleeve 3 relative to the jet shaped body 2.
  • the throttle sleeve 3 has an annular piston section 15. This is sealingly performed in the communicating with the liquid inlet 4 pre-pressure chamber 6 of the housing 1, wherein the exposed to the form, the liquid inlet 4 facing surface is designed as a flow guide 17 in the manner of a Torusabitess arched.
  • the throttle sleeve 3 is more or less against the force of a spring device 18, which by a supported on a support ring 19 coil spring 20th is formed and the throttle sleeve 3 biased against the flow direction of the jet shaped body 2, moved in the direction of the jet outlet opening 5.
  • the area of the annular passage cross-section 14 formed between the jet shaped body 2 and the throttle sleeve 3 can be adjusted via the admission pressure predetermined in the admission pressure chamber.
  • a guide sleeve 21 is provided on the housing 1. This has a passage 13 of the throttle sleeve 3 aligned passage 22 and is connected by means of a molded-on collar 23 with the support ring 19.
  • the inner diameter of the guide sleeve 21 is considerably smaller than the inner diameter of the housing 1 in the region of the pre-pressure space 6, i.
  • the diameter of the annular piston portion 15 of the throttle sleeve 3 is about 16mm
  • the diameter of the passage 13 of the throttle sleeve 3 about 8mm
  • the diameter of the passage 22 of the guide sleeve 21 is about 10mm.
  • the wall thickness of the guide sleeve 21 is dimensioned such that an annular space 24 is formed between the guide sleeve 21 and the housing 1. In this, the coil spring 20 is partially received.
  • the annular space 24 is via (not shown) bores which pass through the wall of the housing 1, vented, may also run through the respective holes in the annulus 24 accumulated liquid.
  • the axial length of the guide sleeve 21 is dimensioned so that the maximum axial distance of the throttle sleeve 3 from the guide sleeve 21, i. the axial distance between the throttle sleeve 3 and the guide sleeve 21 is approximately 8 mm when the passage cross-section 14 is completely closed and thus approximately corresponds to the diameter of the passage 13 of the throttle sleeve 3.
  • the guide sleeve 21 forms a stop for the throttle sleeve 3 for their displacement in the direction of the outlet opening 5 (at maximum admission pressure in the pre-pressure space 16).
  • the guide sleeve 21 is an integral part of the housing 1.
  • the spring 20 is supported on the end face of the guide sleeve 21 forming step from; it protrudes into a formed between the housing 1 and the throttle sleeve 3 annulus.
  • the jet shaped body 2 forms here a separate component.
  • the ribs 8 are inserted (from the inflow side) into corresponding grooves of the housing 1.
  • An inserted into a corresponding recess of the housing 1 circlip 25 secures the jet shaped body. 2

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Description

Die vorliegende Erfindung betrifft eine Flüssigkeitsstrahl-Verschlussdüse. Insbesondere betrifft die vorliegende Erfindung eine - für unterschiedliche Flüssigkeitsdurchsätze geeignete - Flüssigkeitsstrahl-Verschlussdüse mit vordruckgesteuert veränderbarem Durchtrittsquerschnitt, umfassend

  • ein Gehäuse mit einem Flüssigkeitseintritt und einer Strahlaustrittsöffnung,
  • einen in dem Gehäuse zwischen dem Flüssigkeitseintritt und der Strahlaustrittsöffnung angeordneten umströmbaren Strahlformkörper, welcher einen Konusbereich mit in Richtung auf die Strahlaustrittsöffnung des Gehäuses weisender Spitze aufweist,
  • und eine relativ zu dem Gehäuse und dem Strahlformkörper verschiebbare, mittels einer Federeinrichtung gegen die Umströmungsrichtung des Strahlformkörpers vorgespannte Drosselhülse, welche einen in einem mit dem Flüssigkeitseintritt kommunizierenden Vordruckraum des Gehäuses geführten Ringkolbenabschnitt und einen mit dem Konusbereich des Strahlformkörpers zusammenwirkenden, gemeinsam mit diesem den ringförmigen Durchtrittsquerschnitt definierenden Durchgang aufweist.
The present invention relates to a liquid jet closure nozzle. In particular, the present invention relates to a - suitable for different fluid flow rates - liquid jet closure nozzle with pressure controlled variable passage cross-section, comprising
  • a housing with a liquid inlet and a jet outlet opening,
  • a flow-around shaped spray body arranged in the housing between the liquid inlet and the jet outlet opening and having a cone region with a tip pointing in the direction of the jet outlet opening of the housing,
  • and a relative to the housing and the jet body displaceable, biased by a spring means against the Umströmungsrichtung of the jet shaped body throttle sleeve, which cooperates in a communicating with the liquid inlet inlet pressure space of the housing annular piston portion and cooperating with the cone portion of the jet molding body, together with the annular passage cross-section having defining passage.

Anders als Sprühdüsen, die bestimmungsgemäß die Bildung feiner Tröpfchen bzw. eines Flüssigkeitsnebels bezwecken, dienen Strahldüsen der Bildung eines Flüssigkeitsstrahls. Dies ist insbesondere dann angezeigt, wenn die Flüssigkeit von der Düse zu einem Ziel eine vergleichsweise große Distanz zu überbrücken hat, was typischerweise Hand in Hand geht mit dem Erfordernis einer relativ starken Begrenzung der räumlichen Verbreitung (d.h. Bündelung) der die Düse verlassenden Flüssigkeit.Unlike spray nozzles intended for the formation of fine droplets or a liquid mist, jet nozzles serve to form a liquid jet. This is particularly indicated when the liquid from the nozzle to a target has relatively large distance to bridge, which typically goes hand in hand with the requirement of a relatively strong limitation of the spatial distribution (ie bundling) of the liquid leaving the nozzle.

Auf einen definierten Flüssigkeitsdurchsatz abgestimmte Flüssigkeits-Strahldüsen sind in verschiedenen Ausführungen bekannt und im praktischen Gebrauch. Um auch bei im nennenswerten Maß unterschiedlichen Flüssigkeitsdurchsätzen eine vergleichsweise präzise Strahlbildung zu erreichen, wurden die eingangs angegebenen, gattungsgemäßen Flüssigkeits-Strahldüsen mit vordruckgesteuert veränderbarem Durchtrittsquerschnitt konzipiert. Diese verfügen - als Flüssigkeitsstrahl-Verschlussdüsen - zusätzlich über eine Verschlussfunktion, indem der Durchtrittsquerschnitt vollständig verschlossen wird, wenn der Vordruck einen vorgegebenen Wert unterschreitet, wodurch beispielsweise die ungewollte Entleerung von Zuführleitungen verhindert wird. Allerdings ist bei diesen Flüssigkeitsstrahl-Verschlussdüsen in der Praxis immer wieder eine Störung der Strahlbildung zu beobachten.On a defined liquid flow rate matched liquid jet nozzles are known in various designs and in practical use. In order to achieve a comparatively precise jet formation even at significantly different liquid throughputs, the above-mentioned, generic liquid jet nozzles were designed with feed-controlled variable passage cross-section. These have - as liquid jet shut-off nozzles - in addition to a closure function by the passage cross-section is completely closed when the pre-pressure falls below a predetermined value, which for example, the unwanted emptying of supply lines is prevented. However, with these liquid-jet shut-off nozzles, in practice a disturbance of the jet formation can be observed again and again.

Die GB 760972 offenbart eine Sprühdüse, die bereits bei vergleichsweise geringen Drücken eine Verteilung feinster Tröpfchen bzw. eines Nebels innerhalb eines Sprühkegels bewirken soll. Hierzu ist die Düse mit einer Wirbelkammer ausgestattet, welche einer ringförmigen Zerstäuberblende vorgeschaltet ist. Die Düse ist in einen zweiten Betriebsmodus umstellbar, in dem eine Strahlbildung erfolgt. In diesem Modus umströmt die Flüssigkeit einen Pelton-Strahlformkörper und tritt an dessen stromabwärtigen Endbereich in ein axial verstellbares Rohr ein, welches in dem zweiten Betriebsmodus den Strömungsweg zu der Zerstäuberdüse versperrt, wohingegen es in dem ersten Betriebsmodus (Sprühdüse) an dem Strahlformkörper anliegt und den Strömungsweg um diesen herum versperrt. Die Menge der den einen oder den anderen Strömungsweg durchströmenden Flüssigkeit wird von Hand eingestellt.The GB 760972 discloses a spray nozzle, which is intended to effect even at relatively low pressures, a distribution of very fine droplets or a mist within a spray cone. For this purpose, the nozzle is equipped with a vortex chamber, which is connected upstream of an annular Zerstäubigerblende. The nozzle can be switched to a second operating mode in which a beam formation takes place. In this mode, the liquid flows around a Pelton beam shaped body and occurs at the downstream end portion into an axially adjustable tube which in the second mode of operation obstructs the flow path to the atomizer nozzle whereas in the first mode of operation (spray nozzle) it abuts against and obstructs the flow path thereabout. The amount of fluid flowing through one or the other flow path is adjusted manually.

Die EP 2127755 A1 offenbart eine ein integriertes Ventil aufweisende Strömungsführung, wie sie insbesondere einer Düse vorzuschalten ist. Um die - auf eine Vergleichmäßigung der Strömung gerichtete - Wirkung der Strömungsführung zu verbessern wird vorgeschlagen, dass ein in einem Gehäuse verschiebbares Element einen Verschlusskörper sowie einen (in Strömungsrichtung nachgeschalteten) Strömungsbegradiger umfasst. Das Element ist mittels einer Feder dergestalt beaufschlagt, dass der Verschlusskörper gegen einen Dichtsitz vorgespannt ist.The EP 2127755 A1 discloses an integrated valve having a flow guide, as it is in particular a nozzle vorzuschalten. In order to improve the effect of the flow guidance, which is aimed at equalizing the flow, it is proposed that an element which can be displaced in a housing comprise a closure body and a flow straightener downstream of the flow direction. The element is acted upon by means of a spring such that the closure body is biased against a sealing seat.

Die vorliegende Erfindung hat sich im Lichte des vorstehend dargelegten Standes der Technik zur Aufgabe gemacht, eine Flüssigkeitsstrahl-Verschlussdüse der eingangs angegebenen Art bereitzustellen, die sich durch eine verbesserte Leistungsfähigkeit auszeichnet. Insbesondere wird angestrebt, das Strahlbildungsverhalten zu verbessern.The present invention has been made in the light of the above-mentioned prior art, to provide a liquid jet nozzle of the type mentioned, which is characterized by improved performance. In particular, the aim is to improve the beam forming behavior.

Gelöst wird diese Aufgabenstellung gemäß der vorliegenden Erfindung, indem bei einer Flüssigkeitsstrahl-Verschlussdüse der gattungsgemäßen Art abströmseitig des Strahlformkörpers und der Drosselhülse an dem Gehäuse eine Leithülse mit einem gegenüber dem Querschnitt des Vordruckraumes geringeren, zum Durchgang der Drosselhülse fluchtenden Durchgang vorgesehen ist. Die erfindungsgemäßen Flüssigkeitsstrahl-Verschlussdüsen erweisen sich insbesondere hinsichtlich unterschiedlicher Einbausituationen im entscheidenden Maß toleranter ist als bekannte gattungsgemäße Flüssigkeitsstrahl-Verschlussdüsen, was die Qualität der Strahlbildung betrifft. Insbesondere lassen sich mit erfindungsgemäßen Flüssigkeitsstrahl-Verschlussdüsen auch bei Einbausituationen mit flacher, d.h. nur geringfügig oder gar nicht geneigter Strahlrichtung sehr gute Strahlbildungsergebnisse erzielen. Dies macht die erfindungsgemäßen Flüssigkeitsstrahl-Verschlussdüsen solchen bekannten gattungsgemäßen Strahldüsen überlegen, bei denen, wie dies durch die Erfinder ermittelt wurde, eine mit der Einbaulage im Zusammenhang stehende Störung der Strahlbildung existiert. Während nämlich bekannte gattungsgemäße Flüssigkeitsstrahl-Verschlussdüsen in der Praxis das angestrebte Ergebnis mit hinreichender Zuverlässigkeit nur bei bestimmten Einbaulagen zeigen, insbesondere indem das Strahlbildungsverhalten bei mehr oder weniger nach unten gerichteter Strahlrichtung zwar durchaus befriedigend ist, sich aber bei einer Einbausituation, bei der die Austrittsrichtung des Flüssigkeitsstrahls zunehmend flacher wird, signifikant verschlechtert, tritt dieser Nachteil des Standes der Technik bei erfindungsgemäßen Flüssigkeitsstrahl-Verschlussdüsen nicht auf. Diese liefern gleichbleibend gute Strahlbildungsergebnisse unabhängig von der Einbausituation.This object is achieved according to the present invention, by at a liquid jet closure nozzle of the generic type downstream of the jet shaped body and the throttle sleeve on the housing a guide sleeve is provided with a relation to the cross section of the pre-pressure chamber lower, aligned for passage of the throttle sleeve passage. The liquid jet closure nozzles according to the invention prove to be decisively more tolerant, in particular with regard to different installation situations, than known generic liquid jet closure nozzles, which relates to the quality of the jet formation. In particular, can be very good with liquid jet shutter nozzles according to the invention even in installation situations with flat, ie only slightly or not inclined beam direction Achieve beamforming results. This makes the liquid-jet sealing nozzles according to the invention superior to those known generic jet nozzles in which, as determined by the inventors, there is a disturbance of the jet formation associated with the installation position. While known generic liquid jet shutter nozzles in practice show the desired result with sufficient reliability only in certain mounting positions, especially in that the beam forming behavior is more than satisfactory in more or less downwardly directed beam direction, but in an installation situation in which the exit direction of As the jet of liquid becomes increasingly shallower, significantly worsened, this prior art drawback does not occur with liquid jet closure nozzles according to the present invention. These deliver consistently good jet formation results regardless of the installation situation.

Dieses Ergebnis lässt sich dadurch erklären, dass die Strahlbildung beeinträchtigende Flüssigkeitsansammlungen innerhalb des Gehäuses stromabwärts der Drosselhülse durch strömungstechnische Effekte unterbunden werden. Dort ggf. vorhandene Flüssigkeit wird durch den die Drosselhülse verlassenden Flüssigkeitsstrahl mitgerissen, vergleichbar zu der für eine Wasserstrahlpumpe geltenden Situation.This result can be explained by the fact that the jet-forming fluid accumulations are prevented within the housing downstream of the throttle sleeve by fluidic effects. There possibly existing liquid is entrained by the fluid jet leaving the throttle sleeve, comparable to the current situation for a water jet pump.

Im Sinne der vorstehenden Definition der Erfindung wird für die Leithülse, damit sie die erfindungsgemäß ausgenutzte Wirkung hat, eine Mindesterstreckung in axialer Richtung verlangt dergestalt, dass die axiale Länge der Leithülse mindestens ebenso groß ist wie der Durchmesser ihres Durchgangs. Oder mit anderen Worten: Eine Leithülse im Sinne der vorliegenden Erfindung liegt (nur) dann vor, wenn der Durchgang der Leithülse mindestens ebenso lang ist wie dick. Zur Vermeidung von Missverständnissen wird überdies darauf hingewiesen, dass als Querschnitt des Vordruckraumes nicht (nur) die dem Vordruck ausgesetzte Ringfläche der Drosselhülse anzusehen ist, sondern vielmehr der (gesamte) von dem Gehäuse umgrenzte Querschnitt, einschließlich der von Einbauten wie insbesondere dem Strahlformkörper eingenommenen Querschnittsfläche.In the sense of the above definition of the invention is for the guide sleeve, so that it has the inventively exploited effect, a minimum extension in the axial direction required such that the axial Length of the guide sleeve is at least as large as the diameter of its passage. In other words, a guide sleeve according to the present invention is present (only) if the passage of the guide sleeve is at least as long as thick. In order to avoid any misunderstandings, it should also be pointed out that the (cross) section of the admission pressure chamber is not (only) the annular surface of the throttle sleeve exposed to the admission pressure, but rather the (entire) cross section bounded by the housing, including the cross-sectional area occupied by internals such as in particular the jetform body ,

Der Querschnitt (die Querschnittsfläche) des Durchgangs der Leithülse beträgt bevorzugt den 0,3- bis 0,5-fachen Wert der Querschnittsfläche des Vordruckraumes, was - bei runden Konturen - einem Durchmesserverhältnis des Durchgangs der Leithülse zum Vordruckraumes zwischen etwa 0,55 und 0,7 entspricht. Der Durchmesser des Durchgangs der Leithülse beträgt bevorzugt den 1,0- bis 1,5-fachen, besonders bevorzugt den 1,1- bis 1,3-fachen Wert des Durchmessers des Durchgangs der Drosselhülse. Die Leithülse ist dabei bevorzugt so platziert, dass ihr Abstand zu der Drosselhülse, wenn diese an dem Strahlbildungskörper anliegt, nicht größer ist als der 1,5-fache Wert des Durchmessers des Durchgangs der Drosselhülse. Besonders bevorzugt ist jener Abstand nicht größer als der 1,2-fache Wert des Durchmessers des Durchgangs der Drosselhülse.The cross-section (the cross-sectional area) of the passage of the guide sleeve is preferably 0.3 to 0.5 times the value of the cross-sectional area of the pre-pressure space, which - in the case of round contours - has a diameter ratio of the passage of the guide sleeve to the pre-compression space between about 0.55 and 0 , 7 corresponds. The diameter of the passage of the guide sleeve is preferably 1.0 to 1.5 times, more preferably 1.1 to 1.3 times the value of the diameter of the passage of the throttle sleeve. The guide sleeve is preferably placed so that its distance from the throttle sleeve, when it rests against the beam forming body, is not greater than 1.5 times the value of the diameter of the passage of the throttle sleeve. Particularly preferably, that distance is not greater than 1.2 times the value of the diameter of the passage of the throttle sleeve.

Die Drosselhülse erstreckt sich bevorzugt bis zur Austrittsöffnung des Gehäuses. Sie ist, mit anderen Worten, bevorzugt an dem Gehäuse angrenzend an dessen Strahlaustrittsöffnung vorgesehen. Dies ist günstig für einen besonders kompakten Aufbau.The throttle sleeve preferably extends to the outlet opening of the housing. It is, in other words, preferably on the housing adjacent to the latter Beam exit opening provided. This is favorable for a particularly compact construction.

Eine andere bevorzugte Weiterbildung der Erfindung zeichnet sich dadurch aus, dass der Strahlformkörper ortsfest in dem Gehäuse aufgenommen ist. Er kann dabei insbesondere untrennbar mit dem Gehäuse verbunden, z.B. einstückig mit diesem geformt sein. In diesem Fall ist Leithülse bevorzugt ein in das Gehäuse eingesetztes gesondertes Bauteil. Zwischen der Leithülse und dem eigentlichen Gehäuse ist dabei bevorzugt ein Ringraum ausgeführt, in welchem eine die Federeinrichtung für die Drosselhülse bildende Schraubenfeder teilweise aufgenommen ist. Dies gestattet eine besonders kompakte Ausführung der Flüssigkeitsstrahl-Verschlussdüse.Another preferred embodiment of the invention is characterized in that the jet shaped body is received in a stationary manner in the housing. In particular, it may be inseparably connected to the housing, e.g. be integrally molded with this. In this case, guide sleeve is preferably a separate component inserted into the housing. Between the guide sleeve and the actual housing an annular space is preferably carried out, in which a spring means for the throttle sleeve forming coil spring is partially received. This allows a particularly compact design of the liquid jet closure nozzle.

Insbesondere dann, wenn der Strahlformkörper nicht einstückig mit dem Gehäuse geformt ist, kann die Leithülse allerdings auch einen integralen Bestandteil des Gehäuses bilden.In particular, when the jet-shaped body is not integrally formed with the housing, however, the guide sleeve can also form an integral part of the housing.

Während die vorliegende Erfindung sich für verschiedene grundsätzliche Bauweisen von vordruckgesteuerten Flüssigkeitsstrahl-Verschlussdüsen gattungsgemäßer Art eignet, so ist doch besonders bevorzugt, wenn der Flüssigkeitseintritt der Strahlaustrittsöffnung gegenüberliegend angeordnet, d.h. die Flüssigkeitsstrahl-Verschlussdüsen in ihrer Längsrichtung durchströmt ist.While the present invention lends itself to various basic constructions of pre-pressurized liquid jet closure nozzles of the generic type, it is particularly preferred that the liquid inlet be disposed opposite the jet exit orifice, i. the liquid jet shutter nozzles is flowed through in its longitudinal direction.

Soweit vorstehend (und in den Ansprüchen) auf einen "Durchmesser" (beispielsweise den des Gehäuses oder den der Durchgänge von Drosselhülse und Leithülse) Bezug genommen wird, so ist hierunter bei einem von einer Kreisform abweichenden Gestalt, Linie bzw. Kontur der mittlere Durchmesser zu verstehen. Dieser bestimmt sich als der Durchmesser eines Kreises, welcher die gleiche Fläche hat wie die von einer Kreisform abweichende Gestalt, Linie bzw. Kontur.As far as above (and in the claims) to a "diameter" (for example, that of the housing or the passages of throttle sleeve and guide sleeve) reference is taken, then this is to be understood in a shape deviating from a circular shape, line or contour of the average diameter. This is determined as the diameter of a circle which has the same area as the shape, line or contour deviating from a circular shape.

Im Folgenden wird die vorliegende Erfindung anhand zweier in der Zeichnung - jeweils in einem Axialschnitt - veranschaulichter bevorzugter Ausführungsbeispiele näher erläutert. Dabei zeigt

Fig. 1
ein erstes Ausführungsbeispiel und
Fig. 2
ein als Abwandlung des ersten Ausführungsbeispiels ausgeführtes zweites Ausführungsbeispiel.
In the following, the present invention with reference to two in the drawing - each in an axial section - illustrated preferred embodiments explained in more detail. It shows
Fig. 1
a first embodiment and
Fig. 2
a modified embodiment of the first embodiment executed second embodiment.

Die in Fig. 1 gezeigte Flüssigkeitsstrahl-Verschlussdüse mit vordruckgesteuert veränderbarem Durchtrittsquerschnitt umfasst als grundlegende Komponenten ein Gehäuse 1, einen Strahlformkörper 2 und eine Drosselhülse 3. Das im Wesentlichen rohrförmige Gehäuse 1 weist einen Flüssigkeitseintritt 4 und eine Strahlaustrittsöffnung 5 auf. Letztere liegt dem Flüssigkeitseintritt 4 gegenüber, so dass das Gehäuse in seiner Längsrichtung durchströmt ist.In the Fig. 1 As shown in FIG. 2, the fluid-jet closure nozzle with a flow cross-section which can be controlled by a pre-pressure comprises, as basic components, a housing 1, a jet shaped body 2 and a throttle sleeve 3. The substantially tubular housing 1 has a liquid inlet 4 and a jet outlet opening 5. The latter is opposite to the liquid inlet 4, so that the housing is flowed through in its longitudinal direction.

Der Strahlformkörper 2 ist zwischen dem Flüssigkeitseintritt 5 und der Strahlaustrittsöffnung 5 ortsfest in dem Gehäuse 1 angeordnet. Er stützt sich (in einem mit dem Flüssigkeitseintritt 4 kommunizierenden Vordruckraum 6 des Gehäuses 1) über eine Mehrzahl von Rippen 8 dergestalt an dem Gehäuse 1 ab, dass eine Umströmung des Strahlformkörpers 2 möglich ist. Der Strahlformkörper 2 weist anströmseitig ein sich konisch verjüngendes Sackloch 9 und abströmseitig einen Konusbereich 10 mit in Richtung auf die Strahlaustrittsöffnung 5 des Gehäuses 1 weisender Spitze 11 auf. Zwischen dem Konusbereich 10 des Strahlformkörpers 2 und dem rohrförmigen Gehäuse 1 besteht ein Ringraum 12 mit sich in Durchströmungsrichtung D vergrößernder Querschnittsfläche.The jet shaped body 2 is arranged in a stationary manner in the housing 1 between the liquid inlet 5 and the jet outlet opening 5. It is supported on the housing 1 (in a pre-pressure chamber 6 of the housing 1 communicating with the liquid inlet 4) by way of a plurality of ribs 8 in such a way that flow around the jet shaped body 2 is possible. The jet shaped body 2 has a conically tapered blind hole 9 on the inflow side and a conical region 10 on the outflow side with a tip 11 pointing in the direction of the jet outlet opening 5 of the housing 1. Between the cone region 10 of the jet shaped body 2 and the tubular housing 1, there is an annular space 12 with a cross-sectional area which increases in the direction of flow D.

Die weiterhin in dem Gehäuse 1 aufgenommene Drosselhülse 3 ist (in Längsrichtung des Gehäuses 1) relativ zu dem Gehäuse 1 (und somit auch dem ortsfest zu diesem angeordneten Strahlformkörper 2) verschiebbar, so dass sie einen Drosselschieber bildet. Die Drosselhülse 3weist einen zentralen Durchgang 13 auf, welcher mit dem Konusbereich 10 des Strahlformkörpers 2 in dem Sinne zusammenwirkt, dass er gemeinsam mit diesem einen ringförmigen Durchtrittsquerschnitt 14 definiert. Die Fläche des ringförmigen Durchtrittsquerschnitts 14 ist veränderbar; sie hängt von der (axialen) Stellung der Drosselhülse 3 relativ zum Strahlformkörper 2 ab.The further accommodated in the housing 1 throttle sleeve 3 is (in the longitudinal direction of the housing 1) relative to the housing 1 (and thus also the fixed thereto arranged jet-shaped body 2) displaceable, so that it forms a throttle slide. The throttle sleeve 3 has a central passage 13 which cooperates with the cone region 10 of the jet shaped body 2 in the sense that it defines an annular passage cross-section 14 together with it. The surface of the annular passage cross section 14 is variable; it depends on the (axial) position of the throttle sleeve 3 relative to the jet shaped body 2.

Weiterhin weist die Drosselhülse 3 einen Ringkolbenabschnitt 15 auf. Dieser ist dichtend in dem mit dem Flüssigkeitseintritt 4 kommunizierenden Vordruckraum 6 des Gehäuses 1 geführt, wobei die dem Vordruck ausgesetzte, dem Flüssigkeitseintritt 4 zugewandte Fläche als Strömungsleitfläche 17 nach Art eines Torusabschnitts gewölbt ausgeführt ist. Je nach dem in dem Vordruckraum 6 bestehenden Vordruck wird die Drosselhülse 3 mehr oder weniger weit gegen die Kraft einer Federeinrichtung 18, welche durch eine sich an einem Stützring 19 abstützenden Schraubenfeder 20 gebildet ist und die Drosselhülse 3 gegen die Umströmungsrichtung des Strahlformkörpers 2 vorgespannt, in Richtung auf die Strahlaustrittsöffnung 5 verschoben. Auf diese Weise lässt sich über den in dem Vordruckraum vorgegebenen Vordruck die Fläche des zwischen dem Strahlformkörper 2 und der Drosselhülse 3 gebildeten ringförmigen Durchtrittsquerschnitts 14 verstellen.Furthermore, the throttle sleeve 3 has an annular piston section 15. This is sealingly performed in the communicating with the liquid inlet 4 pre-pressure chamber 6 of the housing 1, wherein the exposed to the form, the liquid inlet 4 facing surface is designed as a flow guide 17 in the manner of a Torusabschnitts arched. Depending on the existing in the pre-pressure chamber 6 form the throttle sleeve 3 is more or less against the force of a spring device 18, which by a supported on a support ring 19 coil spring 20th is formed and the throttle sleeve 3 biased against the flow direction of the jet shaped body 2, moved in the direction of the jet outlet opening 5. In this way, the area of the annular passage cross-section 14 formed between the jet shaped body 2 and the throttle sleeve 3 can be adjusted via the admission pressure predetermined in the admission pressure chamber.

Abströmseitig des Strahlformkörpers 2 und der Drosselhülse 3 ist an dem Gehäuse 1 eine Leithülse 21 vorgesehen. Diese weist einen zum Durchgang 13 der Drosselhülse 3 fluchtenden Durchgang 22 auf und ist mittels eines an ihr angeformten Kragens 23 mit dem Stützring 19 verbunden. Der Innendurchmesser der Leithülse 21 ist erheblich geringer als der Innendurchmesser des Gehäuses 1 im Bereich des Vordruckraumes 6, d.h. des Außendurchmessers des Ringkolbenabschnitts 15 der Drosselhülse 3. Bei dem gezeigten Ausführungsbeispiel beträgt der Durchmesser des Ringkolbenabschnitts 15 der Drosselhülse 3 ca. 16mm, der Durchmesser des Durchgangs 13 der Drosselhülse 3 ca. 8mm und der Durchmesser des Durchgangs 22 der Leithülse 21 ca. 10mm.Downstream of the jet shaped body 2 and the throttle sleeve 3, a guide sleeve 21 is provided on the housing 1. This has a passage 13 of the throttle sleeve 3 aligned passage 22 and is connected by means of a molded-on collar 23 with the support ring 19. The inner diameter of the guide sleeve 21 is considerably smaller than the inner diameter of the housing 1 in the region of the pre-pressure space 6, i. In the embodiment shown, the diameter of the annular piston portion 15 of the throttle sleeve 3 is about 16mm, the diameter of the passage 13 of the throttle sleeve 3 about 8mm and the diameter of the passage 22 of the guide sleeve 21 is about 10mm.

Die Wandstärke der Leithülse 21 ist so bemessen, dass zwischen der Leithülse 21 und dem Gehäuse 1 ein Ringraum 24 gebildet ist. In diesem ist die Schraubenfeder 20 (teilweise) aufgenommen. Der Ringraum 24 ist über (nicht gezeigte) Bohrungen, welche die Wand des Gehäuses 1 durchsetzen, belüftet, wobei durch die betreffenden Bohrungen auch ggf. in dem Ringraum 24 angesammelte Flüssigkeit ablaufen kann.The wall thickness of the guide sleeve 21 is dimensioned such that an annular space 24 is formed between the guide sleeve 21 and the housing 1. In this, the coil spring 20 is partially received. The annular space 24 is via (not shown) bores which pass through the wall of the housing 1, vented, may also run through the respective holes in the annulus 24 accumulated liquid.

Die axiale Länge der Leithülse 21 ist so bemessen, dass maximale axiale Abstand der Drosselhülse 3 von der Leithülse 21, d.h. der bei vollständig geschlossenem Durchtrittsquerschnitt 14 bestehende axiale Abstand der Drosselhülse 3 von der Leithülse 21 etwa 8mm beträgt und somit etwa dem Durchmesser des Durchgangs 13 der Drosselhülse 3 entspricht. Die Leithülse 21 bildet dabei einen Anschlag für die Drosselhülse 3 für deren Verschiebung in Richtung auf die Austrittsöffnung 5 (bei maximalem Vordruck in dem Vordruckraum 16).The axial length of the guide sleeve 21 is dimensioned so that the maximum axial distance of the throttle sleeve 3 from the guide sleeve 21, i. the axial distance between the throttle sleeve 3 and the guide sleeve 21 is approximately 8 mm when the passage cross-section 14 is completely closed and thus approximately corresponds to the diameter of the passage 13 of the throttle sleeve 3. The guide sleeve 21 forms a stop for the throttle sleeve 3 for their displacement in the direction of the outlet opening 5 (at maximum admission pressure in the pre-pressure space 16).

Bei der in Fig. 2 veranschaulichten Abwandlung ist die Leithülse 21 integraler Bestandteil des Gehäuses 1. Die Feder 20 stützt sich an der Stirnseite der die Leithülse 21 bildenden Stufe ab; sie ragt in einen zwischen dem Gehäuse 1 und der Drosselhülse 3 ausgebildeten Ringraum hinein. Der Strahlformkörper 2 bildet hier ein gesondertes Bauteil. Die Rippen 8 sind (von der Zuströmseite her) in korrespondierende Nuten des Gehäuses 1 eingesetzt. Ein in eine korrespondierende Ausnehmung des Gehäuses 1 eingesetzter Sicherungsring 25 sichert den Strahlformkörper 2.At the in Fig. 2 illustrated modification, the guide sleeve 21 is an integral part of the housing 1. The spring 20 is supported on the end face of the guide sleeve 21 forming step from; it protrudes into a formed between the housing 1 and the throttle sleeve 3 annulus. The jet shaped body 2 forms here a separate component. The ribs 8 are inserted (from the inflow side) into corresponding grooves of the housing 1. An inserted into a corresponding recess of the housing 1 circlip 25 secures the jet shaped body. 2

Im Übrigen gelten für die in Fig. 2 veranschaulichte Abwandlung die Erläuterungen der Fig. 1, auf die zur Vermeidung von Wiederholungen verwiesen wird.Incidentally, apply to the in Fig. 2 illustrated variation the explanations of Fig. 1 referenced to avoid repetition.

Claims (10)

  1. Liquid jet shut-off nozzle having a pre-pressure-controlled variable passage cross-section (14) comprising
    - a housing (1) having a liquid inlet (4) and a jet outlet opening (5),
    - a jet shaping body (2) around which flow can take place, arranged in the housing (1) between the liquid inlet (4) and the jet outlet opening (2), which jet shaping body (2) has a conical region (10) with a tip (11) pointing in the direction of the jet outlet opening (5) of the housing (1),
    - and a throttle sleeve (3) pre-tensioned by means of a spring device (18) towards the flow-around direction of the jet shaping body (2), which is displaceable relative to the housing (1) and the jet shaping body (2), which has an annular piston portion (15) guided in a pre-pressure chamber (6) of the housing which communicates with the liquid inlet (4) and a passage (13) which cooperates with the conical region (11) of the jet shaping body (2) and which together with this defines the annular passage cross-section (14),
    characterized in that on the downstream side of the jet shaping body (2) and the throttle sleeve (3), a guide sleeve (21) having a passage (22) which is smaller compared with the cross-section of the pre-pressure chamber (6) and in alignment to the passage (13) of the throttle sleeve (3) is provided on the housing (1).
  2. The liquid jet shut-off nozzle according to claim 1, characterized in that the cross-section of the passage (22) of the guide sleeve (21) is at least as large as the cross-section of the passage (13) of the throttle sleeve (3).
  3. The liquid jet shut-off nozzle according to claim 2, characterized in that the cross-section of the passage (22) of the guide sleeve (21) is greater than the cross-section of the passage (22) of the throttle sleeve (3).
  4. The liquid jet shut-off nozzle according to one of claims 1 to 3, characterized in that the maximum axial distance of the throttle sleeve (3) from the guide sleeve (21) is not greater than the average diameter of the passage (22) of the guide sleeve (21).
  5. The liquid jet shut-off nozzle according to one of claims 1 to 4, characterized in that the maximum axial distance of the throttle sleeve (3) from the guide sleeve (21) is not greater than the average diameter of the passage (13) of the throttle sleeve (3).
  6. The liquid jet shut-off nozzle according to one of claims 1 to 5, characterized in that the liquid inlet (4) is arranged opposite the jet outlet opening (5).
  7. The liquid jet shut-off nozzle according to one of claims 1 to 6, characterized in that the jet shaping body (2) is accommodated fixedly in the housing (1).
  8. The liquid jet shut-off nozzle according to claim 7, characterized in that the jet shaping body (2) is connected undetachably to the housing (1), wherein the guide sleeve (21) forms a separate component inserted in the housing (1).
  9. The liquid jet shut-off nozzle according to claim 8, characterized in that the spring device (18) comprises a helical spring (20) which is partially accommodated in an annular space (24) formed between the guide sleeve (21) and the housing (1).
  10. The liquid jet shut-off nozzle according to one of claims 1 to 6, characterized in that the guide sleeve (21) forms an integral component of the housing (1).
EP15198624.7A 2014-12-09 2015-12-09 Liquid jet nozzle closure Active EP3031531B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15198624T PL3031531T3 (en) 2014-12-09 2015-12-09 Liquid jet nozzle closure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014018130.8A DE102014018130A1 (en) 2014-12-09 2014-12-09 Liquid jet shut-off

Publications (2)

Publication Number Publication Date
EP3031531A1 EP3031531A1 (en) 2016-06-15
EP3031531B1 true EP3031531B1 (en) 2019-10-23

Family

ID=54843736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15198624.7A Active EP3031531B1 (en) 2014-12-09 2015-12-09 Liquid jet nozzle closure

Country Status (5)

Country Link
EP (1) EP3031531B1 (en)
DE (1) DE102014018130A1 (en)
DK (1) DK3031531T3 (en)
ES (1) ES2759234T3 (en)
PL (1) PL3031531T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016123994A1 (en) 2016-12-09 2018-06-14 Aebi Schmidt Nederland Bv liquid jet nozzle
DE102016123993B4 (en) 2016-12-09 2021-12-30 Aebi Schmidt Nederland Bv Liquid jet shut-off nozzle
CN114321735A (en) * 2020-09-30 2022-04-12 华为技术有限公司 Bidirectional automatic turn-off device and liquid cooling system
CN113864563B (en) * 2021-10-15 2023-05-16 西安西热节能技术有限公司 Working medium converging device and method for adjusting local flow velocity of pipeline

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB760972A (en) * 1953-03-27 1956-11-07 Josef Cornel Breinl Improvements in and relating to spray nozzles
US3684192A (en) * 1970-06-22 1972-08-15 Fire Task Force Innovations In Constant pressure, variable flow nozzle
JP2003159549A (en) * 2001-09-12 2003-06-03 Ikeuchi:Kk Spray nozzle
EP2127755A1 (en) * 2008-05-12 2009-12-02 Pnr Italia S.R.L. Flow guide with integrated valve
US8146617B2 (en) * 2009-07-07 2012-04-03 Wen Yi Lin Check valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DK3031531T3 (en) 2020-01-13
ES2759234T3 (en) 2020-05-08
PL3031531T3 (en) 2020-04-30
DE102014018130A1 (en) 2016-06-09
EP3031531A1 (en) 2016-06-15

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