EP0043566A1 - Ejector device - Google Patents

Ejector device Download PDF

Info

Publication number
EP0043566A1
EP0043566A1 EP81105170A EP81105170A EP0043566A1 EP 0043566 A1 EP0043566 A1 EP 0043566A1 EP 81105170 A EP81105170 A EP 81105170A EP 81105170 A EP81105170 A EP 81105170A EP 0043566 A1 EP0043566 A1 EP 0043566A1
Authority
EP
European Patent Office
Prior art keywords
ejector device
sections
another
walls
ejector
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
EP81105170A
Other languages
German (de)
French (fr)
Other versions
EP0043566B1 (en
Inventor
Jürgen Volkmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Successione Testamentaria thilo Volkmann
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6106489&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0043566(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to AT81105170T priority Critical patent/ATE7244T1/en
Publication of EP0043566A1 publication Critical patent/EP0043566A1/en
Application granted granted Critical
Publication of EP0043566B1 publication Critical patent/EP0043566B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
    • F04F5/22—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type

Definitions

  • the invention relates to an ejector device which consists of at least two ejectors formed by a corresponding number of axially successive jet nozzles of increasing size within a common elongate housing, which is divided by transverse walls containing the jet nozzles into chambers separated from one another by check valves.
  • Ejector devices of this type in which the nozzles located between the first and the last nozzle are both driving and catching nozzles, are known in principle.
  • their use has hitherto been restricted to the generation of negative pressure for pumping empty containers and the like, with first all chambers except the chambers following the last nozzle being connected to the container and ensuring the extraction of relatively large amounts of air which by gradually closing the check valves with increasing vacuum, until the end only the ejector formed by the first two jet nozzles generates the final vacuum.
  • the design of such ejector devices is associated with considerable effort and requires a largely individual adaptation to the individual application.
  • the invention is therefore based on the object of creating an ejector device of the type mentioned which, while taking advantage of the economic advantages of mass production, allows easy adaptation to a wide variety of applications without any special processing effort and thereby increases the possible uses of the ejector device.
  • the housing in the modular system consists of a plurality of sections which adjoin one another in the longitudinal direction and can be combined with one another as desired and which each contain at most one transverse wall.
  • the invention is based on the consideration that the number of successive ejectors is different for different applications, and creates in the way of the modular system the possibility of an individual compilation of modular elements designed as sections for an ejector device corresponding to the respective intended use.
  • the combination of sections that can be combined with one another in any order enables the individual sections to be produced in large numbers without restricting the possible combinations.
  • the production costs are thereby reduced, and the appropriate ejector device can be individually assembled in a very short time from a limited number of prefabricated sections.
  • the sections can be assembled in different ways.
  • the sections are held together by common connecting means such as continuous tie rods.
  • special connecting means can also be provided for connecting two adjacent sections.
  • the housing has a circular cross section and the sections are provided with a screw thread.
  • the sections can then be screwed together directly.
  • the individual sections can each consist of a transverse wall and an adjoining jacket wall.
  • the distance between the nozzles is determined by the length of the jacket wall sections.
  • a special design feature of the invention provides that the transverse walls on the one hand and the jacket walls of the chambers on the other hand form separate sections. For this measure, it is sufficient to provide only the sections forming the peripheral walls of the chambers in different lengths in order to be able to take any nozzle spacing into account.
  • each transverse wall can contain a jet nozzle, preferably inserted in the middle, or several jet nozzles in any distribution, if only Corresponding transverse walls with matching nozzle distribution are available for each nozzle size. It is of course also possible to provide the transverse walls with a corresponding number and distribution of bores from case to case, in which the nozzles are only subsequently inserted in a suitable manner.
  • the nozzles can also be formed directly in the transverse walls by appropriately shaped bores.
  • another advantageous embodiment of the invention provides that, in addition to at least one jet nozzle, the transverse walls each contain one or more through-openings provided with check valves, which at the beginning of the generation of negative pressure allow large amounts of air to be extracted with the aid of all nozzles located one behind the other and then automatically with increasing negative pressure chamber off, the negative pressure due to the increasing nozzle ize g is limited.
  • Yet another design feature of the invention provides that the sections in the area of the jacket walls of the chambers are provided with connection openings into which hose connections, valves or sealing plugs can be screwed.
  • a section for forming a pressure chamber following the last jet nozzle is pot-shaped and provided with one or more front and / or radial blow-out openings.
  • the blow-out openings can be provided with a thread for screwing in connection nipples or sealing plugs, and finally the cup-shaped section can contain an insert for sound insulation.
  • a transverse wall containing the first nozzle has at least one additional opening for connecting a pressure accumulator via a shuttle valve which can be charged via the latter from a pressure medium source feeding the ejector device.
  • the ejector device according to the invention enables a wide variety of uses and thus offers a multitude of advantages over the known ejector devices with several ejectors.
  • the ejector device according to the invention can be used in a known manner for vacuum generation by means of a pressurized gas, for example compressed air, the extracted gas being a multiple of the amount of propellant gas due to the series connection of several ejectors.
  • a pressurized gas for example compressed air
  • the extracted gas being a multiple of the amount of propellant gas due to the series connection of several ejectors.
  • the ejector device according to the invention also enables the simultaneous generation of overpressure and underpressure, as is required, for example, for the mechanical movement of sheets of paper in printers.
  • this requirement could only be met with the aid of electric vacuum pumps, which are subject to wear and tear and require considerable effort for maintenance and elimination of wear, and also require sealing oil with comparatively large dimensions and a high noise level.
  • the special arrangement of the additional opening in the transverse wall containing the first nozzle for connecting a pressure accumulator via a shuttle valve also enables the vacuum and abrupt pressure to be suddenly abolished in such applications when the propellant gas is switched off, in that case the shuttle valve automatically switches over and so far connecting chamber under vacuum, to which the suction devices of the machine are connected, connects to the pressure accumulator. The sucked Textilbö g s are thereby released instantly.
  • gases can also be mixed in a simple manner, a pressurized first gas being used as the propellant gas and further gases being sucked into the intermediate chambers between the individual jet nozzles and being mixed with one another in the process.
  • the mixing of gases with liquids and / or powdered or granulated solid substances is also possible in the same way.
  • the ejector according to the invention enables with minimum expenditure of energy to multiply the amount of gas used as the propellant with a corresponding reduction in its pressure.
  • a blow-off amount of gas eight times the minimum that results, for example, at cascade connection of five ejectors of the propellant used g asmenge with a corresponding reduction of the pressure is .
  • 1 - 5 are five jet nozzles increasing in size in the order of the designation numbers referred to, which in the example form a single nozzle set located in the central axis of the ejector device. Instead, it is also possible to provide a plurality of such nozzle sets with a plurality of nozzles of the same size lying next to one another or on a circle, the nozzles arranged in parallel being in turn axially aligned with one another.
  • the jet nozzles 1 - 5 are inserted into receiving bores within transverse walls 6 - 10 by pressing, gluing or screwing ; sets or can also be part of these walls.
  • the construction A provides that the transverse walls, as in the example the transverse wall 10, each form a section and are received by a recess delimited by a shoulder within a section 11 forming the jacket wall of a subsequent chamber, in which they are held by a are held and sealed further jacket wall section 12, which is provided with an external thread and is screwed into the subsequent jacket wall section 11 provided with an internal thread within the recess.
  • This construction is particularly suitable in the event that the transverse wall contains a plurality of eccentric nozzles (not shown) which must be aligned with one another from transverse wall to transverse wall.
  • Construction B provides that the transverse walls, as in the example the walls 6-9, connect in one piece to a jacket section and thereby form a cohesive segment with the ends of the inner and outer threads which are directly adjacent to the adjacent one Section can be screwed on. It is obvious that this construction can only be used in conjunction with a central jet nozzle.
  • the chambers 13 - 16 created by the segment construction described above between the individual jet nozzles are connected to one another by bores 17-2o in the transverse walls, which have check valves 21-24 which close as soon as the negative pressure in one chamber becomes greater than in the subsequent chamber.
  • the last chamber 25 is under pressure during operation.
  • the individual chambers 13-16 contain radial connection openings 26-29, which are provided with threads and, depending on the intended use, enable the attachment of connecting nipples or sealing plugs.
  • the segment 11 which is cup-shaped and has a radial connection openings 3o a and an axial connection opening 3o b, in which connection nipples or plugs 31 a and 31 b can be used.
  • the first transverse wall 6 contains a pressure distribution chamber 32 in front of the jet nozzle 1 or possibly several such jet nozzles used therein, to which a connecting nipple 34 inserted into a bore 33 leads for the supply of the propellant gas to the ejector device.
  • the chamber 13 located between the first and second jet nozzles 1 and 2 is also connected via a connection opening 35 in the transverse wall 6 to the one connection of a shuttle valve 36, the other connection of which is connected to the propellant gas supply line leading to the connection nipple 34 and to the third one Connection is a pressure accumulator 37.
  • This arrangement ensures that when the propellant gas supply to the nozzle 1 is switched off via the connecting nipple 34, the negative pressure in the chamber 13 immediately breaks down as a result of the changeover valve 36 being switched over, and instead an excess pressure builds up in the chamber 13 from the pressure accumulator 37.
  • a regulator 38 in the propellant gas supply line enables the pressure and quantity of the propellant gas to be regulated continuously.
  • a muffler 39 projecting into the last chamber 25 can be arranged on the segment 11.

Abstract

Bei einer Ejektorvorrichtung, bestehend aus mindestens zwei von einer entsprechenden Anzahl axial aufeinanderfolgender Strahldüsen (1-5) zunehmender Grösse gebildeten Ejektoren innerhalb eines gemeinsamen langgestreckten Gehäuses, das von die Strahldüsen (1-5) enthaltenden Querwänden in durch Rückschlagventile (21-24) voneinander getrennten Kammern (13-16, 25) unterteilt ist, besteht das Gehäuse im Baukastensystem aus mehreren in Längsrichtung aneinander anschliessenden und beliebig miteinander kombinierbaren Sektionen (6-11), die jeweils höchstens eine Querwand enthaten.In an ejector device consisting of at least two ejectors formed by a corresponding number of axially successive jet nozzles (1-5) of increasing size within a common elongated housing, the transverse walls containing the jet nozzles (1-5) in one another by check valves (21-24) is divided into separate chambers (13-16, 25), the housing in the modular system consists of several sections (6-11) which adjoin one another in the longitudinal direction and can be combined with one another as desired, each of which contained at most one transverse wall.

Description

Die Erfindung betrifft eine Ejektorvorrichtung, die aus mindestens zwei von einer entsprechenden Anzahl axial aufeinanderfolgender Strahldüsen zunehmender Größe gebildeten Ejektoren innerhalb eines gemeinsamen langgestreckten Gehäuses besteht, das von die Strahldüsen enthaltenden Querwänden in durch Rückschlagventile voneinander getrennte Kammern unterteilt ist.The invention relates to an ejector device which consists of at least two ejectors formed by a corresponding number of axially successive jet nozzles of increasing size within a common elongate housing, which is divided by transverse walls containing the jet nozzles into chambers separated from one another by check valves.

Ejektorvorrichtungen dieser Art, bei denen die zwischen der ersten und der letzten Düse gelegenen Düsen Treib- und Fangdüsen zugleich sind, sind grundsätzlich bekannt. Ihre Verwendung beschränkt sich jedoch bisher praktisch nur auf die Erzeugung von Unterdruck zum Leerpumpen von Gefäßen und dergleichen, wobei zunächst alle Kammern mit Ausnahme der auf die letzte Düse folgenden Kammern mit dem Gefäß in Verbindunq stehen und für die Absaugung verhältnismäßig großer Luftmengen zu sorgen, die durch das aufeinanderfolgende Schließen der Rückschlagventile mit zunehmendem Vakuum stufenweise verringert werden, bis zum Schluß nur noch der von den ersten beiden Strahldüsen gebildete Ejektor das endgültige Vakuum erzeugt. Darüber hinaus ist die konstruktive Ausgestaltung derartiger Ejektorvorrichtungen mit erheblichem Aufwand verbunden und verlangt eine weitgehend individuelle Anpassung an den einzelnen Anwendungsfall.Ejector devices of this type, in which the nozzles located between the first and the last nozzle are both driving and catching nozzles, are known in principle. However, their use has hitherto been restricted to the generation of negative pressure for pumping empty containers and the like, with first all chambers except the chambers following the last nozzle being connected to the container and ensuring the extraction of relatively large amounts of air which by gradually closing the check valves with increasing vacuum, until the end only the ejector formed by the first two jet nozzles generates the final vacuum. In addition, the design of such ejector devices is associated with considerable effort and requires a largely individual adaptation to the individual application.

Zur Vereinfachung und Standardisierung wenigstens des Gehäuses derartiger Ejektorvorrichtungen ist es auch bereits bekannt (DE-OS 24 57 36o), das Ejektorgehäuse aus einem querliegenden Strangprofil herzustellen, das je nach seiner Länge unterschiedlich breite Ejektorgehäuse für eine beliebige Anzahl paralleler Sätze von aufeinanderfolgenden Strahldüsen ergibt, das nachträglich mit entsprechenden Bohrungen zum Einsetzen der Düsen versehen wird. Die Anzahl der aufeinanderfolgenden Kammern und damit die Anzahl der hintereinanderliegenen Ejektoren ist jedoch unveränderlich, und alle Kammern münden über seitliche öffnungen mit darin eingesetzten Rückschlagventilen in eine gemeinsame Ansaugkammer, an welche ein leerzupumpendes Gefäß oder eine sonstige mit Vakuum zu betreibende Einrichtung angeschlossen werden kann.To simplify and standardize at least the housing of such ejector devices, it is also already known (DE-OS 24 57 36o) to produce the ejector housing from a transverse extruded profile which, depending on its length, gives ejector housings of different widths for any number of parallel sets of successive jet nozzles, which is subsequently provided with appropriate holes for inserting the nozzles. However, the number of successive chambers and thus the number of ejectors lying one behind the other cannot be changed, and all chambers open out through side openings with a setback inserted therein valves in a common suction chamber, to which an empty pumping vessel or another device to be operated with vacuum can be connected.

Die Einsatzmöglichkeit der bekannten Ejektorvorrichtung mit als Strangprofil ausgebildetem Gehäuse ist deshalb trotz der beliebigen Anzahl paralleler Düsensätze begrenzt, und die Anpassung an den jeweiligen Anwendungsfall mit unterschiedlicher Anzahl und Auswahl der Strahldüsen führt zu einem erheblichen Bearbeitungsaufwand, der die Vorteile des Strangprofils wieder zunichte macht.The possible use of the known ejector device with a housing designed as an extruded profile is therefore limited in spite of the arbitrary number of parallel nozzle sets, and the adaptation to the respective application with a different number and selection of the jet nozzles leads to a considerable amount of processing work which negates the advantages of the extruded profile.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Ejektorvorrichtung der eingangs genannten Art zu schaffen, die unter Ausnützung der wirtschaftlichen Vorteile der Massenherstellung dennoch ohne besonderen Bearbeitungsaufwand eine leichte Anpassung an die verschiedensten Anwendungsfälle gestattet und dadurch die Anwendungsmöglichkeiten der Ejektorvorrichtung vergrößert.The invention is therefore based on the object of creating an ejector device of the type mentioned which, while taking advantage of the economic advantages of mass production, allows easy adaptation to a wide variety of applications without any special processing effort and thereby increases the possible uses of the ejector device.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das Gehäuse im Baukastensystem aus mehreren in Längsrichtung aneinander anschließenden und beliebig miteinander kombinierbaren Sektionen besteht, die jeweils höchstens eine Querwand enthalten. Die Erfindung geht dabei von der Überlegung aus, das die Anzahl der aufeinanderfolgenden Ejektoren für verschiedene Anwendungsfälle unterschiedlich ist, und schafft im Wege des Baukastensystems die Möglichkeit zu einer individuellen Zusammenstellung von als Sektionen ausgebildeten Baukastenelementen zu einer dem jeweiligen Verwendungszweck entsprechenden Ejektorvorrichtung. Die Zusammensetzung aus in beliebiger Folge miteinander kombinierbaren Sektionen ermöglicht die Herstellung der einzelnen Sektionen in großen Stückzahlen, ohne die Kombinationsmöglichkeiten zu beschränken. Die Herstellungskosten werden dadurch gesenkt, und die jeweils passende Ejektorvorrichtung läßt sich in kürzester Zeit aus einer beschränkten Anzahl vorgefertigter Sektionen individuell zusammenstellen.According to the invention, this object is achieved in that the housing in the modular system consists of a plurality of sections which adjoin one another in the longitudinal direction and can be combined with one another as desired and which each contain at most one transverse wall. The invention is based on the consideration that the number of successive ejectors is different for different applications, and creates in the way of the modular system the possibility of an individual compilation of modular elements designed as sections for an ejector device corresponding to the respective intended use. The combination of sections that can be combined with one another in any order enables the individual sections to be produced in large numbers without restricting the possible combinations. The production costs are thereby reduced, and the appropriate ejector device can be individually assembled in a very short time from a limited number of prefabricated sections.

Der Zusammenbau der Sektionen kann auf unterschiedlichem Wege erfolgen. Nach einem ersten Merkmal zur vorteilhaften Ausgestaltung sind hierzu die Sektionen durch gemeinsame Verbindungsmittel wie beispielsweise durchgehende Zuganker zusammengehalten. Nach einer alternativen Ausgestaltung können aber auch für die Verbindung zweier benachbarter Sektionen besondere Verbindungsmittel vorgesehen sein. In diesem Falle ist es besonders zweckmäßig, wenn das Gehäuse Kreisquerschnitt aufweist und die Sektionen mit Schraubgewinde versehen sind. Die Sektionen können dann unmittelbar miteinander verschraubt sein. Es ist aber ebenso im Rahmen einer weiteren vorteilhaften Ausgestaltung der Erfindung möglich, die Sektionen durch Überwurfmuttern gegeneinander zu verspannen, was insbesondere dann von Vorteil ist, wenn die Querwände mehrere exzentrisch angeordnete Düsen enthalten, die axial zueinander ausgerichtet sein müssen und demgemäß ein unmittelbares Verschrauben der Sektionen gegeneinander nicht zulassen.The sections can be assembled in different ways. According to a first characteristic of the advantageous embodiment, the sections are held together by common connecting means such as continuous tie rods. According to an alternative embodiment, special connecting means can also be provided for connecting two adjacent sections. In this case, it is particularly expedient if the housing has a circular cross section and the sections are provided with a screw thread. The sections can then be screwed together directly. However, it is also possible within the scope of a further advantageous embodiment of the invention to brace the sections against one another by means of union nuts, which is particularly advantageous if the transverse walls contain a plurality of eccentrically arranged nozzles which have to be aligned axially with respect to one another and accordingly screw directly on Do not allow sections against each other.

Im Rahmen der Erfindung können die einzelnen Sektionen aus jeweils einer Querwand und einer daran anschließenden Mantelwand bestehen. Der Abstand der Düsen ist hierbei jedoch durch die Länge der Mantelwandabschnitte festgelegt. Um diese Beschränkung zu vermeiden, ohne hierzu die Anzahl der mit Strahldüsen versehenen Sektionen zu vervielfachen, sieht ein besonderes Ausgestaltungsmerkmal der Erfindung vor, daß die Querwände einerseits und die Mantelwände der Kammern andererseits voneinander getrennte Sektionen bilden. Für diese Maßnahme genügt es, lediglich die die Umfangswände der Kammern bildenden Sektionen in unterschiedlichen Längen bereit zu stellen, um beliebige Düsenabstände berücksichtigen zu können.In the context of the invention, the individual sections can each consist of a transverse wall and an adjoining jacket wall. However, the distance between the nozzles is determined by the length of the jacket wall sections. In order to avoid this limitation without multiplying the number of sections provided with jet nozzles, a special design feature of the invention provides that the transverse walls on the one hand and the jacket walls of the chambers on the other hand form separate sections. For this measure, it is sufficient to provide only the sections forming the peripheral walls of the chambers in different lengths in order to be able to take any nozzle spacing into account.

Wie bereits erwähnt, kann jede Querwand eine, vorzugsweise in ihrer Mitte eingesetzte Strahldüse'öder auch mehrere Strahldüsen in beliebiger Verteilung enthalten, sofern nur für jede Düsengröße entsprechende Querwände mit übereinstimmender Düsenverteilung bereitgehalten werden. Es ist natürlich auch möglich, die Querwände von Fall zu Fall mit einer entsprechenden Anzahl und Verteilung von Bohrungen zu versehen, in welche die Düsen erst nachträglich auf geeignete Weise eingesetzt werden. Auch können die Düsen unmittelbar in den Querwänden durch entsprechend geformte Bohrungen ausgebildet sein.As already mentioned, each transverse wall can contain a jet nozzle, preferably inserted in the middle, or several jet nozzles in any distribution, if only Corresponding transverse walls with matching nozzle distribution are available for each nozzle size. It is of course also possible to provide the transverse walls with a corresponding number and distribution of bores from case to case, in which the nozzles are only subsequently inserted in a suitable manner. The nozzles can also be formed directly in the transverse walls by appropriately shaped bores.

Darüber hinaus sieht eine andere vorteilhafte Ausgestaltung der Erfindung vor, daß die Querwände außer jeweils mindestens einer Strahldüse eine oder mehrere mit Rückschlagventilen versehene Durchgangsöffnungen enthalten, die zu Beginn der Unterdruckerzeugung die Absaugung großer Luftmengen mit Hilfe aller hintereinanderliegenden Düsen gestatten und dann selbsttätig mit zunehmendem Unterdruck diejenigen Kammer abschalten, deren Unterdruck aufgrund der zunehmenden Düsengröße beschränkt ist.In addition, another advantageous embodiment of the invention provides that, in addition to at least one jet nozzle, the transverse walls each contain one or more through-openings provided with check valves, which at the beginning of the generation of negative pressure allow large amounts of air to be extracted with the aid of all nozzles located one behind the other and then automatically with increasing negative pressure chamber off, the negative pressure due to the increasing nozzle ize g is limited.

Noch ein weiteres Ausgestaltungsmerkmal der Erfindung sieht vor, daß die Sektionen im Bereich der Mantelwände der Kammern mit Anschlußöffnungen versehen werden, in welche Schlauchanschlüsse, Ventile oder Verschlußpfropfen einschraubbar sind.Yet another design feature of the invention provides that the sections in the area of the jacket walls of the chambers are provided with connection openings into which hose connections, valves or sealing plugs can be screwed.

Nach noch einem weiteren Ausgestaltungsmerkmal der Erfindung ist eine Sektion zur Bildung einer auf die letzte Strahldüse folgenden Druckkammer topfförmig ausgebildet und mit einer oder mehreren stirnseitigen und/oder radialen Ausblasöffnungen versehen. Die Ausblasöffnungen können mit Gewinde zum Einschrauben von Anschlußnippeln oder Verschlußstopfen versehen sein, und es kann schließlich die topfförmige Sektion einen Einsatz zur Schalldämmung enthalten.According to yet another design feature of the invention, a section for forming a pressure chamber following the last jet nozzle is pot-shaped and provided with one or more front and / or radial blow-out openings. The blow-out openings can be provided with a thread for screwing in connection nipples or sealing plugs, and finally the cup-shaped section can contain an insert for sound insulation.

Schließlich besteht ein letztes Merkmal zur vorteilhaften Ausgestaltung der Erfindung darin, daß eine die erste Düse enthaltende Querwand mindesten eine zusätzliche öffnung zum Anschluß eines Druckspeichers über ein Wechselventil aufweist, der über letzteres von einer die Ejektorvorrichtung speisenden Druckmittelquelle aufladbar ist.Finally, a last feature of the advantageous embodiment of the invention is that a transverse wall containing the first nozzle has at least one additional opening for connecting a pressure accumulator via a shuttle valve which can be charged via the latter from a pressure medium source feeding the ejector device.

Die erfindungsgemäße Ejektorvorrichtung ermöglicht den unterschiedlichsten Einsatz und bietet damit gegenüber den bekannten Ejektorvorrichtungen mit mehreren Ejektoren eine Vielzahl von Vorteilen.The ejector device according to the invention enables a wide variety of uses and thus offers a multitude of advantages over the known ejector devices with several ejectors.

So läßt sich die erfindungsgemäße Ejektorvorrichtung in bekannter Weise zur Vakuumerzeugung mittels eines unter Überdruck stehenden Treibgases, zum Beispiel Druckluft einsetzen, wobei das abgesaugte Gas infolge der Hintereinanderschaltung von mehreren Ejektoren ein Vielfaches von der Menge des Treibgases ist. Dadurch wird.im Vergleich zu gewöhnlichen Ejektoren, die aus nur einer Treibdüse und einer Fangdüse bestehen, eine erhebliche Energieeinsparung erzielt, und gegenüber der bekannten Ejektorvorrichtung mit aus Strangprofil hergestelltem Gehäuse läßt sich die Anzahl der hintereinanderliegenden Ejektoren im einzelnen Anwendungsfall entsprechend frei wählen.Thus, the ejector device according to the invention can be used in a known manner for vacuum generation by means of a pressurized gas, for example compressed air, the extracted gas being a multiple of the amount of propellant gas due to the series connection of several ejectors. As a result, compared to conventional ejectors, which consist of only one driving nozzle and one catching nozzle, considerable energy savings are achieved, and compared to the known ejector device with a housing made of extruded profile, the number of successive ejectors can be freely selected in the individual application.

Die erfindungsgemäße Ejektorvorrichtung ermöglicht ferner die gleichzeitige Erzeugung von Überdruck und Unterdruck wie dies beispielsweise für das maschinelle Bewegen von Papierbögen in Druckereien gefordert wird. Diese Forderung konnte bisher nur mit Hilfe elektrischer Vakuumpumpen erfüllt werden, welche verschleißbehaftet sind und beträchtlichen Aufwand zur Wartung und Verschleißbeseitigung erfordern und außerdem bei vergleichsweise großen Abmessungen und hohem Geräuschpegel Dichtöl benötigen. Die besondere Anordnung der zusätzlichen öffnung in der die erste Düse enthaltenden Querwand zum Anschluß eines Druckspeichers über ein Wechselventil ermöglicht in derartigen Anwendungsfällen außerdem eine schlagartige Aufhebung des Unterdrucks und Erzeugung von Überdruck bei der Abschaltung des Treibgases, indem das Wechselventil hierbei von selbst umstellt und die bisher unter Vakuum stehende anschließende Kammer, an welche die Saugeinrichtungen der Maschine angeschlossen sind, mit dem Druckspeicher verbindet. Die angesaugten Papierbögen werden dadurch augenblicklich freigegeben.The ejector device according to the invention also enables the simultaneous generation of overpressure and underpressure, as is required, for example, for the mechanical movement of sheets of paper in printers. Until now, this requirement could only be met with the aid of electric vacuum pumps, which are subject to wear and tear and require considerable effort for maintenance and elimination of wear, and also require sealing oil with comparatively large dimensions and a high noise level. The special arrangement of the additional opening in the transverse wall containing the first nozzle for connecting a pressure accumulator via a shuttle valve also enables the vacuum and abrupt pressure to be suddenly abolished in such applications when the propellant gas is switched off, in that case the shuttle valve automatically switches over and so far connecting chamber under vacuum, to which the suction devices of the machine are connected, connects to the pressure accumulator. The sucked Papierbö g s are thereby released instantly.

Mit der erfindungsgemäßen Ejektorvorrichtung lassen sich ferner auf einfachem Wege mehrere Gase mischen, wobei ein unter Druck stehendes erstes Gas als Treibgas verwendet wird und zwischen den einzelnen Strahldüsen weitere Gase in die dazwischengelegenen Kammern gesaugt und dabei miteinander vermischt werden. Auf gleichem Wege ist auch die Vermischung von Gasen mit Flüssigkeiten und/oder pulverisierten oder granulierten festen Stoffen möglich.With the ejector device according to the invention, several gases can also be mixed in a simple manner, a pressurized first gas being used as the propellant gas and further gases being sucked into the intermediate chambers between the individual jet nozzles and being mixed with one another in the process. The mixing of gases with liquids and / or powdered or granulated solid substances is also possible in the same way.

Je nachdem,wieviel Düsen an jeder Querwand vorgesehen sind, lassen sich Mehrfach-Ejektorvorrichtungen mit unterschiedlicher Leistung unter Verwendung einer verhältnismäßig geringen Anzahl verschiedener Einzelelemente zusammenstellen.Depending on how many nozzles are provided on each transverse wall, multiple ejector devices with different performance can be put together using a relatively small number of different individual elements.

Schließlich ermöglicht die erfindungsgemäße Ejektorvorrichtung mit geringstem Energieaufwand eine Vervielfachung der als Treibgas verwendeten Gasmenge bei entsprechender Verminderung ihres Drucks. So ergibt sich beispielsweise bei Hintereinanderschaltung von fünf Ejektoren eine Ausblasmenge an Gas, die mindestens das achtfache der verwendeten Treibgasmenge bei entsprechender Herabsetzung des Druckes beträgt.Finally, the ejector according to the invention enables with minimum expenditure of energy to multiply the amount of gas used as the propellant with a corresponding reduction in its pressure. Thus, a blow-off amount of gas eight times the minimum that results, for example, at cascade connection of five ejectors of the propellant used g asmenge with a corresponding reduction of the pressure is .

Die Erfindung wird nachstehend in Verbindung mit der Zeichnung näher erläutert, die einen Axialschnitt durch eine mehrstufige Ejektorvorrichtung gemäß der Erfindung zeigt, bei welcher die einzelnen Sektionen teilweise (Konstruktion A) mittelbar und teilweise (Konstruktion B) unmittelbar miteinander verschraubt sind.The invention is explained in more detail below in connection with the drawing, which shows an axial section through a multi-stage ejector device according to the invention, in which the individual sections are partially (construction A) indirectly and partly (construction B) directly screwed together.

In der Zeichnung sind mit 1 - 5 fünf in ihrer Größe in der Reihenfolge der Bezeichnungsziffern zunehmende Strahldüsen bezeichnet, die im Beispielsfall einen einzigen, in der Mittelachse der Ejektorvorrichtung gelegenen Düsensatz bilden. Statt- dessen können auch mehrere solche Düsensätze mit mehreren nebeneinander oder auf einem Kreis liegenden, jeweils gleich großen Düsen vorgesehen sein, wobei die parallel angeordneten Düsen wiederum satzweise axial zueinander ausgerichtet sind.In the drawing, 1 - 5 are five jet nozzles increasing in size in the order of the designation numbers referred to, which in the example form a single nozzle set located in the central axis of the ejector device. Instead, it is also possible to provide a plurality of such nozzle sets with a plurality of nozzles of the same size lying next to one another or on a circle, the nozzles arranged in parallel being in turn axially aligned with one another.

Die Strahldüsen 1 - 5 sind in Aufnahmebohrungen innerhalb von Querwänden 6 - 1o durch Pressen, Kleben oder Schrauben einge- ; setzt oder können auch Bestandteil dieser Wände sein.The jet nozzles 1 - 5 are inserted into receiving bores within transverse walls 6 - 10 by pressing, gluing or screwing ; sets or can also be part of these walls.

Die Konstruktion A sieht vor, daß die Querwände, wie im Beispielsfall die Querwand 10, für sich jeweils eine Sektion bilden und von einer durch eine Schulter begrenzten Ausdrehung innerhalb einer die Mantelwand einer darauf folgenden Kammer bildenden Sektion 11 aufgenommen werden, in welcher sie durch eine weitere Mantelwandsektion 12 gehalten und abgedichtet sind, die mit Außengewinde versehen und in die mit Innengewinde innerhalb der Ausdrehung versehene darauffolgende Mantelwandsektion 11 eingeschraubt ist. Diese Kontruktion ist besonders für den Fall geeignet, daß die Querwand mehrere (nicht gezeigte) exzentrische Düsen enthält, die von Querwand zu Querwand zueinander ausgerichtet sein müssen.The construction A provides that the transverse walls, as in the example the transverse wall 10, each form a section and are received by a recess delimited by a shoulder within a section 11 forming the jacket wall of a subsequent chamber, in which they are held by a are held and sealed further jacket wall section 12, which is provided with an external thread and is screwed into the subsequent jacket wall section 11 provided with an internal thread within the recess. This construction is particularly suitable in the event that the transverse wall contains a plurality of eccentric nozzles (not shown) which must be aligned with one another from transverse wall to transverse wall.

Die Konstruktion B sieht demgegenüber vor, daß die Querwände, wie im Beispielsfall die Wände 6 - 9 einstückig an je einen Mantelabschnitt anschließen und dadurch mit diesem ein zusammenhängendes Segment bilden, das mit Hilfe von Innen- bzw. Außengewinden an seinen Enden unmittelbar an die benachbarte Sektion angeschraubt werden kann. Es leuchtet ein, daß diese Kontruktion nur in Verbindung mit einer zentrischen Strahldüse verwendbar ist.Construction B, on the other hand, provides that the transverse walls, as in the example the walls 6-9, connect in one piece to a jacket section and thereby form a cohesive segment with the ends of the inner and outer threads which are directly adjacent to the adjacent one Section can be screwed on. It is obvious that this construction can only be used in conjunction with a central jet nozzle.

Die durch die vorstehend beschriebene Segmentbauweise entstehenden Kammern 13 - 16 zwischen den einzelnen Strahldüsen sind durch Bohrungen 17 - 2o in den Querwänden miteinander verbunden, welche Rückschlagklappen 21 - 24 aufweisen, die schließen, sobald der Unterdruck in einer Kammer größer als in der nachfolgenden Kammer wird. Die letzte Kammer 25 steht demgegenüber im Betrieb unter Überdruck.The chambers 13 - 16 created by the segment construction described above between the individual jet nozzles are connected to one another by bores 17-2o in the transverse walls, which have check valves 21-24 which close as soon as the negative pressure in one chamber becomes greater than in the subsequent chamber. In contrast, the last chamber 25 is under pressure during operation.

Die einzelnen Kammern 13 - 16 enthalten radiale Anschlußöffnungen 26 - 29, die mit Gewinde versehen sind und je nach Verwendungszweck die Anbringung von Anschlußnippeln oder Verschlußstopfen ermöglichen.In ähnlicher Weise ist das die Vorrichtung abschließende und hierzu topfförmig ausgebildete Segment 11 mit radialen Anschlußöffnungen 3o a und einer axialen Anschlußöffnung 3o b versehen, in welche Anschlußnippel oder Verschlußstopfen 31 a bzw. 31 b einsetzbar sind.The individual chambers 13-16 contain radial connection openings 26-29, which are provided with threads and, depending on the intended use, enable the attachment of connecting nipples or sealing plugs. Similarly, the segment 11, which is cup-shaped and has a radial connection openings 3o a and an axial connection opening 3o b, in which connection nipples or plugs 31 a and 31 b can be used.

Die erste Querwand 6 enthält vor der darin eingesetzten Strahldüse 1 bzw. ggf. mehreren solchen Strahldüsen eine Druckverteilungskammer 32, zu der ein in eine Bohrung 33 eingesetzter Anschlußnippel34 für die zufuhr des Treibgases der Ejektorvorrichtung führt.The first transverse wall 6 contains a pressure distribution chamber 32 in front of the jet nozzle 1 or possibly several such jet nozzles used therein, to which a connecting nipple 34 inserted into a bore 33 leads for the supply of the propellant gas to the ejector device.

Die zwischen der ersten und der zweiten Strahldüse 1 bzw. 2 gelegene Kammer 13 ist ferner über eine Anschlußöffnung 35 in der Querwand 6 mit dem einen Anschluß eines Wechselventils 36 verbunden, dessen anderer Anschluß an die zum Anschlußnippel 34 führende Treibgaszuleitung angeschlossen ist und an dessen drittem Anschluß ein Druckspeicher 37 liegt. Mit dieser Anordnung wird erreicht, daß bei der Abschaltung der Treibgaszufuhr zur Düse 1 über den Anschlußnippel 34 der Unterdruck in der Kammer 13 infolge Umschaltung des Wechselventils 36 sofort zusammenbricht und stattdessen sich in der Kammer 13 ein Überdruck aus dem Druckspeicher 37 aufbaut. Eine an die Anschlußöffnung 28 der Kammer 13 angeschlossene Saugeinrichtung, mit der beispielsweise Papierbögen transportiert werden, wird deshalb den angesaugten Bogen sofort freigeben, wobei der entstehende Überdruck verhindert, daß der Bogen an der Sauqeinrichtung durch reine Adhäsion haften bleibt. Ein Regler 38 in der Treibgas-Zufuhrleitung ermöglicht eine stufenlose Regelung von Druck und Menge des Treibgases.The chamber 13 located between the first and second jet nozzles 1 and 2 is also connected via a connection opening 35 in the transverse wall 6 to the one connection of a shuttle valve 36, the other connection of which is connected to the propellant gas supply line leading to the connection nipple 34 and to the third one Connection is a pressure accumulator 37. This arrangement ensures that when the propellant gas supply to the nozzle 1 is switched off via the connecting nipple 34, the negative pressure in the chamber 13 immediately breaks down as a result of the changeover valve 36 being switched over, and instead an excess pressure builds up in the chamber 13 from the pressure accumulator 37. A suction device connected to the connection opening 28 of the chamber 13, with which, for example, sheets of paper are transported, will therefore immediately release the sucked-in sheet, the resulting excess pressure preventing the sheet from seq device sticks through pure adhesion. A regulator 38 in the propellant gas supply line enables the pressure and quantity of the propellant gas to be regulated continuously.

An dem Segment 11 kann, wie schematisch angedeutet, ein in die letzte Kammer 25 ragender Schalldämpfer 39 angeordnet sein.As indicated schematically, a muffler 39 projecting into the last chamber 25 can be arranged on the segment 11.

Claims (15)

•• 1. Ejektorvorrichtung, bestehend aus mindestens zwei von einer entsprechenden Anzahl axial aufeinander folgender Strahldüsen zunehmender Größe gebildeten Ejektoren innerhalb eines gemeinsamen langgestreckten Gehäuses, das von die Strahldüsen enthaltenden Querwänden in durch Rückschlagventile voneinander getrennte Kammern unterteilt ist, dadurch gekennzeichnet , daß das Gehäuse im Baukastensystem aus mehreren in Längsrichtung aneinander anschließenden und beliebig miteinander kombinierbaren Sektionen (6 - 11) besteht, die jeweils höchstens eine Querwand enthalten.1. ejector device, consisting of at least two ejectors formed by a corresponding number of axially successive jet nozzles of increasing size within a common elongated housing which is divided by the jet nozzles-containing transverse walls into chambers separated from one another by check valves, characterized in that the housing consists of a modular system there are a plurality of sections (6 - 11) which adjoin one another in the longitudinal direction and can be combined with one another as desired, each of which contains at most one transverse wall. 2. Ejektorvorrichtung nach Anspruch 1, dadurch gekennzeichnet , daß die Sektionen ( 6 - 11 ) durch gemeinsame Verbindungsmittel zusammengehalten sind.2. Ejector device according to claim 1, characterized in that the sections (6 - 11) are held together by common connecting means. 3. Ejektorvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß für die Verbindung zweier benachbarter Sektionen (6 - 11) besondere Verbindungsmittel vorgesehen sind.3. Ejector device according to claim 1, characterized in that special connecting means are provided for the connection of two adjacent sections (6 - 11). 4. Ejektorvorrichtung nach Anspruch 3, dadurch gekennzeichnet , daß das Gehäuse Kreisquerschnitt aufweist und die Sektionen (6 - 11) mit Schraubgewinde versehen sind.4. Ejector device according to claim 3, characterized in that the housing has a circular cross section and the sections (6 - 11) are provided with screw threads. 5. Ejektorvorrichtung nach Anspruch 4, dadurch gekennzeichnet , daß die Sektionen (6-11) unmittelbar miteinander verschraubt sind.5. Ejector device according to claim 4, characterized in that the sections (6-11) are screwed together directly. 6. Ejektorvorrichtung nach Anspruch 4, dadurch gekennzeichnet , daß die Sektionen (6 - 11) durch Überwurfmuttern gegeneinander verspannt sind.6. ejector device according to claim 4, characterized in that the sections (6 - 11) are braced against one another by union nuts. 7. Ejektorvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Querwände (10) einerseits und die Mantelwände (12) andererseits voneinander getrennte Sektionen bilden.7. Ejector device according to one of the preceding claims, characterized in that the transverse walls (1 0 ) on the one hand and the jacket walls (12) on the other hand form separate sections. 8. Ejektorvorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die die Umfangswände (12) der Kammern (16) bildenden Sektionen dem gewünschten Düsenabstand entsprechend unterschiedlich lang ausgebildet sind.8. Ejector device according to claim 7, characterized in that the sections forming the peripheral walls (12) of the chambers (16) are of different lengths corresponding to the desired nozzle spacing. 9. Ejektorvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß die Querwände außer jeweils mindestens einer Strahldüse (1 - 5) ein oder mehrere mit Rückschlagventilen (21 - 24) versehene Durchgangsöffnungen (17 - 20) enthalten.9. Ejector device according to one of the preceding claims, characterized in that the transverse walls contain in addition to at least one jet nozzle (1 - 5) one or more through-openings (17 - 2 0 ) provided with check valves (21 - 24). 10. Ejektorvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß die Sektionen (7, 8, 9, 12) im Bereich der Mantelwände der Kammern (13 - 16) mit Anschlußöffnungen (26 - 29) versehen sind.1 0 . Ejector device according to one of the preceding claims, characterized in that the sections (7, 8, 9, 12) are provided with connection openings (26-29) in the region of the jacket walls of the chambers (13-16). 11. Ejektorvorrichtung nach Anspruch 10, dadurch gekennzeichnet , daß in die Anschlußöffnungen (26 - 29) Schlauchanschlüsse, Ventile oder Verschlußpfropfen einschraubbar sind.11. Ejector device according to claim 1 0 , characterized in that in the connection openings (26 - 29) hose connections, valves or plugs can be screwed. 12. Ejektorvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß eine Sektion (11) zur Bildung der Druckkammer topfförmig ausgebildet und mit einem oder mehreren stirnseitigen und/ oder radialen Ausblasöffnungen (3oa, 3ob) versehen ist.12. Ejector device according to one of the preceding claims, characterized in that a section (11) for forming the pressure chamber is cup-shaped and is provided with one or more end-face and / or radial blow-out openings (3oa, 3ob). 13. Ejektorvorrichtung nach Anspruch 12, dadurch gekennzeichnet , daß die Ausblasöffnungen (3o a, 3o b) mit Gewinde zum Einschrauben von Anschlußnippeln (31 a, 31 b) oder Verschlußpfropfen versehen sind.13. Ejector device according to claim 12, characterized in that the blow-out openings (3o a, 3o b) are provided with a thread for screwing in connection nipples (31 a, 31 b) or sealing plugs. 14. Ejektorvorrichtung nach Anspruch 12 oder 13, dadurch gekennzeichnet , daß die topfförmige Sektion (11) einen Einsatz (25) zur Schalldämmung enthält.14. Ejector device according to claim 12 or 13, characterized in that the cup-shaped section (11) contains an insert (25) for sound insulation.
EP81105170A 1980-07-05 1981-07-03 Ejector device Expired EP0043566B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105170T ATE7244T1 (en) 1980-07-05 1981-07-03 EJECTOR DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3025525 1980-07-05
DE19803025525 DE3025525A1 (en) 1980-07-05 1980-07-05 EJECTOR DEVICE

Publications (2)

Publication Number Publication Date
EP0043566A1 true EP0043566A1 (en) 1982-01-13
EP0043566B1 EP0043566B1 (en) 1984-04-25

Family

ID=6106489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105170A Expired EP0043566B1 (en) 1980-07-05 1981-07-03 Ejector device

Country Status (5)

Country Link
US (1) US4466778A (en)
EP (1) EP0043566B1 (en)
JP (1) JPS5783699A (en)
AT (1) ATE7244T1 (en)
DE (1) DE3025525A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603839A1 (en) * 1985-02-08 1986-08-21 Dan Kiryat Greenberg METHOD FOR PRODUCING AN EJECTOR DEVICE
US4748826A (en) * 1984-08-24 1988-06-07 Michael Laumen Thermotechnik Ohg. Refrigerating or heat pump and jet pump for use therein
AU628595B2 (en) * 1989-07-10 1992-09-17 John Stanley Melbourne Improved vacuum pump device
KR20030077349A (en) * 2002-03-26 2003-10-01 삼조쎌텍 주식회사 Functional chewing gum containing isoflavone
CN105156787A (en) * 2015-08-12 2015-12-16 安徽亿能机械有限公司 Double-cavity pressurization connector

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE427954B (en) * 1979-06-15 1983-05-24 Piab Ab EJECTOR
IL70239A (en) * 1983-11-15 1988-03-31 Dan Greenberg Multichamber ejector
US4790054A (en) * 1985-07-12 1988-12-13 Nichols William O Multi-stage venturi ejector and method of manufacture thereof
US4759691A (en) * 1987-03-19 1988-07-26 Kroupa Larry G Compressed air driven vacuum pump assembly
DE3851481D1 (en) * 1987-06-29 1994-10-20 Volkmann Thilo Jet pump.
JPH0247618U (en) * 1988-09-24 1990-03-30
JP2878385B2 (en) * 1990-04-20 1999-04-05 エスエムシー株式会社 Ejector device
DE4032857C1 (en) * 1990-10-12 1992-01-23 Noell Gmbh, 8700 Wuerzburg, De Bendable grab unit for remote searching - has illumination member and flexible coating unit
JPH0467618U (en) * 1990-10-18 1992-06-16
US5228839A (en) * 1991-05-24 1993-07-20 Gast Manufacturing Corporation Multistage ejector pump
SE469291B (en) * 1991-10-31 1993-06-14 Piab Ab EJECTOR ARRANGEMENTS INCLUDING AT LEAST TWO PRESSURIZED EJECTORS AND PROCEDURAL PROVIDES THAT WITH A MINIMUM TWO PRESSURE AIRED EJECTORS ACHIEVES A DIFFERENT PREVENTION OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY OF A MINIMUM DIFFICULTY.
US5683227A (en) * 1993-03-31 1997-11-04 Smc Corporation Multistage ejector assembly
DE4430574C2 (en) * 1994-08-18 1996-07-18 Mannesmann Ag Jet pump with two supersonic nozzles
DE4432441A1 (en) * 1994-09-12 1996-03-14 Sellmaier Horst Mixing nozzle for first and second fluids
SE511716E5 (en) * 1998-03-20 2009-01-28 Piab Ab ejector
IL125791A (en) * 1998-08-13 2004-05-12 Dan Greenberg Vacuum pump
DE29916531U1 (en) * 1999-09-20 2001-02-08 Volkmann Thilo Ejector
DE20011839U1 (en) * 2000-07-07 2000-12-14 Festo Ag & Co Vacuum generator device
SE0201335L (en) * 2002-05-03 2003-03-25 Piab Ab Vacuum pump and ways to provide vacuum
KR100629994B1 (en) * 2005-12-30 2006-10-02 한국뉴매틱(주) Vacuum ejector pumps
KR100730323B1 (en) * 2007-03-15 2007-06-19 한국뉴매틱(주) Vacuum system using a filter cartridge
CN102203435B (en) * 2008-09-09 2014-09-10 迪傲公司 Supersonic ejector package
US20100150743A1 (en) * 2008-12-12 2010-06-17 Norgren Automotive, Inc. Single Line Venturi Apparatus
GB2509184A (en) 2012-12-21 2014-06-25 Xerex Ab Multi-stage vacuum ejector with moulded nozzle having integral valve elements
GB2509183A (en) 2012-12-21 2014-06-25 Xerex Ab Vacuum ejector with tripped diverging exit flow nozzle
GB2509182A (en) 2012-12-21 2014-06-25 Xerex Ab Vacuum ejector with multi-nozzle drive stage and booster
EP2935899B1 (en) * 2012-12-21 2021-12-08 Piab Aktiebolag Vacuum ejector nozzle with elliptical diverging section
KR101424959B1 (en) 2014-04-08 2014-08-01 한국뉴매틱(주) Vacuum pump
GB201418117D0 (en) 2014-10-13 2014-11-26 Xerex Ab Handling device for foodstuff
WO2017044627A1 (en) * 2015-09-08 2017-03-16 Berkshire Grey Inc. Systems and methods for providing dynamic vacuum pressure in an articulated arm end effector
KR101699721B1 (en) 2016-09-01 2017-02-13 (주)브이텍 Vacuum pump array thereof
CN107859658B (en) * 2017-10-27 2019-02-19 江苏大学 A kind of jetted self-priming system of adjustable aperture
CA3187653A1 (en) 2017-11-07 2019-05-16 Berkshire Grey Operating Company, Inc. Systems and methods for providing dynamic vacuum pressure at an end effector using a single vacuum source
WO2020145628A1 (en) * 2019-01-08 2020-07-16 이효길 Vacuum pump and vacuum separator comprising same
KR102194572B1 (en) * 2019-01-08 2020-12-23 이효길 Vacuum Pump

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR361049A (en) * 1905-11-27 1906-05-14 Westinghouse Electric Corp Advanced diffuser system for ejector
US1423198A (en) * 1922-07-18 Vacuum jet and system of operating the same
FR933502A (en) * 1946-09-03 1948-04-23 Manufacturing process of ejectors and ejectors obtained by this process
US3784325A (en) * 1971-05-28 1974-01-08 Inst Cercetare Si Proiectare T Method of and apparatus for the gas-lift withdrawal of a liquid from a subterranean space
FR2253932A1 (en) * 1973-12-05 1975-07-04 Piab Ab
US4171016A (en) * 1977-12-19 1979-10-16 Kempton Edward A Water removal system for gas wells

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB339402A (en) * 1900-01-01
AT30001B (en) * 1905-12-07 1907-09-25 Westinghouse Sa Ejector for compressible liquids.
CH101872A (en) * 1921-12-12 1923-11-01 Eugene Caron Virgile A method and apparatus for the suction and compression of a gaseous fluid.
US2000762A (en) * 1933-10-26 1935-05-07 Gen Electric Fluid jet pump
FR842373A (en) * 1938-02-11 1939-06-12 Robinetterie S A J Soc D Multiple effect hydro-ejector
US2378425A (en) * 1938-02-22 1945-06-19 Murray Henry Lamont Ejector-condenser
US2211795A (en) * 1938-07-06 1940-08-20 Harry R Levy Attachment for internal combustion engines
US2275627A (en) * 1939-04-03 1942-03-10 Milford W Hartmann Pumping system
DE1071290B (en) * 1953-10-23
DE953280C (en) * 1954-04-08 1956-11-29 Carl Metz Feuerwehrgeraetefabr Multi-stage blasting device for venting pumps, containers, etc. like
US3445335A (en) * 1965-05-28 1969-05-20 Gen Electric Nuclear reactor system with jet pump flow means
DE1503706C3 (en) * 1965-06-19 1971-09-02 Siemens Ag JET SUCTION UNITS CONNECTED TO A VACUUM PUMP
SE427954B (en) * 1979-06-15 1983-05-24 Piab Ab EJECTOR

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1423198A (en) * 1922-07-18 Vacuum jet and system of operating the same
FR361049A (en) * 1905-11-27 1906-05-14 Westinghouse Electric Corp Advanced diffuser system for ejector
FR933502A (en) * 1946-09-03 1948-04-23 Manufacturing process of ejectors and ejectors obtained by this process
US3784325A (en) * 1971-05-28 1974-01-08 Inst Cercetare Si Proiectare T Method of and apparatus for the gas-lift withdrawal of a liquid from a subterranean space
FR2253932A1 (en) * 1973-12-05 1975-07-04 Piab Ab
US4171016A (en) * 1977-12-19 1979-10-16 Kempton Edward A Water removal system for gas wells

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748826A (en) * 1984-08-24 1988-06-07 Michael Laumen Thermotechnik Ohg. Refrigerating or heat pump and jet pump for use therein
DE3603839A1 (en) * 1985-02-08 1986-08-21 Dan Kiryat Greenberg METHOD FOR PRODUCING AN EJECTOR DEVICE
AU628595B2 (en) * 1989-07-10 1992-09-17 John Stanley Melbourne Improved vacuum pump device
KR20030077349A (en) * 2002-03-26 2003-10-01 삼조쎌텍 주식회사 Functional chewing gum containing isoflavone
CN105156787A (en) * 2015-08-12 2015-12-16 安徽亿能机械有限公司 Double-cavity pressurization connector

Also Published As

Publication number Publication date
JPS6329120B2 (en) 1988-06-10
US4466778A (en) 1984-08-21
JPS5783699A (en) 1982-05-25
DE3025525C2 (en) 1987-05-21
DE3025525A1 (en) 1982-01-28
ATE7244T1 (en) 1984-05-15
EP0043566B1 (en) 1984-04-25

Similar Documents

Publication Publication Date Title
EP0043566B1 (en) Ejector device
DE19755678B4 (en) pump device
DE102007059530A1 (en) vacuum suction
EP2084451B1 (en) Lubricant distributor
CH679237A5 (en)
DE1189704B (en) Method and device for degassing thermoplastic plastics in screw presses
DE60217187T2 (en) Compressed air supply unit with a compressor
DE102009031106A1 (en) Method for degassing a liquid
DE10061384B4 (en) Jet pump arrangement for generating vacuum and method for operating such a jet pump arrangement
CH657390A5 (en) METHOD FOR TRANSPORTING A THREAD BY MEANS OF A PRESSURE GAS.
DE102011115713A1 (en) Transfer drum for a machine for the production of products of the tobacco processing industry
WO2001025615A1 (en) High pressure fuel accumulator
DE4319017C2 (en) Swash plate compressor
DE60118342T2 (en) BAR FOR DELIVERING A MIXTURE FROM LIQUID AND CLEANING AGENT FOR AUTOMATIC CLEANING OF PRINTING MACHINE CYLINDERS
DE3933254A1 (en) PNEUMATIC, VACUUM-WORKING SYSTEM
DE3416041A1 (en) PROGRESSIVE DISTRIBUTOR FOR LUBRICANTS
DE1625894B1 (en) Arrangement for changing the amount of lubricant in a cyclically operating lubricant distributor
DE4241913A1 (en) Pressure controller for vehicle antilock braking circuit - incorporates switching valve circuit to give traction control function
EP0398078A2 (en) Compact piston vibrator
DE1920628A1 (en) Screw pump
EP1005615A1 (en) Multi-stage side channel pump
DE3147030C2 (en) Solenoid valve unit
DE19843695B4 (en) metering
DE2949520C2 (en) Device for the separation of gaseous and liquid components from thick sludge-like mixtures
EP0769474A2 (en) Double injector

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH FR GB IT SE

17P Request for examination filed

Effective date: 19811126

ITF It: translation for a ep patent filed

Owner name: DOTT. GIOVANNI LECCE & C.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT CH FR GB IT LI SE

REF Corresponds to:

Ref document number: 7244

Country of ref document: AT

Date of ref document: 19840515

Kind code of ref document: T

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

26 Opposition filed

Opponent name: WALTER SARSTEDT KUNSTSTOFF-SPRITZGUSSWERK

Effective date: 19841231

R26 Opposition filed (corrected)

Opponent name: BACHMANN, PETER W.

Effective date: 19841231

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

R26 Opposition filed (corrected)

Opponent name: BACHMANN, PETER W.

Effective date: 19841231

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19860315

ITTA It: last paid annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: THILO VOLKMANN

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

ITPR It: changes in ownership of a european patent

Owner name: SUCCESSIONE TESTAMENTARIA;THILO VOLKMANN

EAL Se: european patent in force in sweden

Ref document number: 81105170.5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19980723

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980724

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990731

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000718

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000721

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000821

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20010702

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 20010704

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Effective date: 20010702

EUG Se: european patent has lapsed

Ref document number: 81105170.5