EP1131562B1 - Pompe a ejecteur a etages multiples - Google Patents

Pompe a ejecteur a etages multiples Download PDF

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Publication number
EP1131562B1
EP1131562B1 EP00962511A EP00962511A EP1131562B1 EP 1131562 B1 EP1131562 B1 EP 1131562B1 EP 00962511 A EP00962511 A EP 00962511A EP 00962511 A EP00962511 A EP 00962511A EP 1131562 B1 EP1131562 B1 EP 1131562B1
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EP
European Patent Office
Prior art keywords
nozzle
bore
pump according
ejector pump
nozzles
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.)
Expired - Lifetime
Application number
EP00962511A
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German (de)
English (en)
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EP1131562A1 (fr
Inventor
Thilo Volkmann
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Individual
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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
    • F04F5/48—Control
    • F04F5/52—Control of evacuating pumps
    • 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
    • F04F5/46—Arrangements of nozzles
    • F04F5/467—Arrangements of nozzles with a plurality of nozzles arranged in series

Definitions

  • the invention relates to a multi-stage ejector with the features of Preamble of claim 1.
  • the housing kit-like composed of individual parts.
  • Each kit carries in a transverse wall passing through a housing interior one of the nozzles. If registerede ejectors are to be realized, this wall can also several Carry nozzles in juxtaposition.
  • the finished pump is created. Here is the onset of the nozzles, z. In the Ways of gluing or even the one-piece integration of the nozzle in the partition comparatively easy. However, arise between the housing parts many sealing surfaces. The possibilities for compact design are very restricted.
  • Such an ejector is u. a. from DE-C1-44 91 977, Figures 7 to 9, known.
  • ejector pumps in which a Stranggußprofil with inner Partitions is used and the nozzles across the profile axis through graduated Holes are used in the individual partitions.
  • the predominant Part of the nozzles is located in the two sides of the partitions Cavities which serve the gas distribution. Although omitted the aforementioned many sealing surfaces, but is the fitting and sealing of the nozzles difficult. Besides, compactness of such ejectors is not essential better than the aforementioned modular pumps.
  • the multistage is the one-piece, axially aligned nozzle body by sections larger Inside diameter connected to a suction port.
  • This type of nozzle preparation requires on the one hand very complex forming steps in the area undercut Zones.
  • only a cylindrical or conical Course of the successive nozzle cross sections feasible.
  • the compressed gas supply and the suction chamber are housed in flanged components, which using a variety of filigree seals with the the one-piece nozzle housing body connected by screws become.
  • the compressed gas connection and the suction gas connection are in one Side surface arranged parallel to the nozzle channel within the walls flanged housing parts. These gas connections are perpendicular to the Nozzle axis continued.
  • the variety of additional sealing surfaces in the flanged area Housing parts make this ejector susceptible to leakage. This Risk is due to U-shaped running along the nozzle assembly, closed Side walls of the housing body only slightly mitigated.
  • the invention is based on the problem, a generic Multi-stage ejector pump in compact design with replaceable nozzles and high efficiency.
  • a multi-stage ejector with the features of claim 1.
  • the ejector nozzle system of a set consists of individual nozzles and nozzle spacers, wherein the spacers leave the suction gas inlet gap between adjacent nozzles.
  • the nozzles are inserted one behind the other in the nozzle receiving shaft.
  • each individual nozzle has at least two axially spaced support elements to their non-tilting or tilting support against the shaft wall.
  • the spacers can - in principle - z. B. in the form of stages in the nozzle receiving shaft be provided on the housing element. Preferred according to the invention, because easier to produce and easier to the desired nozzle arrangement However, they are separate or, preferably, one-piece - preferred eccentric - provided on the nozzles and in each of the two Cases inserted into the nozzle receiving shaft. A particularly high efficiency the ejector pump is reached when the spacers are only made of slender noses or similar projections on a Düsenstimende are. It is preferred to provide only a single such spacer. A preferred arrangement of the one or more nose-shaped Spacer is chosen so that between two adjacent nozzles the Spacers are arranged in flow-poorer peripheral zones of the nozzles, z. B. on the gas inlet side opposite the nozzle side.
  • an ejector is a parallel to the nozzle receiving shaft for the compressed gas supply extending bore (pressure gas bore) provided.
  • Their axis forms, more preferably, with the axis of the nozzle receiving shaft and the Suction gas hole - ie with the suction gas well - essentially a plane.
  • a flat cubic block made of light metal can be used as the housing element or plastic can be realized by drilling both from the solid as can also be produced by injection molding.
  • the parallel arrangement of Nozzle receiving shaft with the suction gas shaft and / or the compressed gas bore (Gas duct) in a single housing block is - independent of the features of claim 1 - of independent inventive significance.
  • control valves for switching on and off the vacuum function and / or for the active blowing off of a sucked part, d. H. for the purpose of collapsing of the vacuum are used in receiving bores, the latter can run at right angles through the pressure gas bore and into the Extend nozzle receiving shaft into it. That way, despite the Presence of such control valves a very short length of Ejektorblocks allows.
  • the control valves are reciprocable within valve sleeves.
  • the valve sleeves are by means of O-rings in the control valve holes used and by a bolted to the Ejektorblock valve plate in her Axial direction clamped.
  • the valve plate takes in a known manner electromagnetic Pilot or servo valves on which a fluidic connection establish or interrupt between compressed gas and control valve and thereby open or close the control valves pneumatically.
  • Multi-stage ejector pumps according to the invention can be used for generating vacuum z. B. for handling applications (sheet metal transport in press lines for body parts, Pick-and-place applications in plastic injection molding and the like) be used. They are extremely compact and lightweight and can easily integrate functions such as electrical control of vacuum on and off switching and / or blowing off as well Monitoring the vacuum level.
  • From Figure 1 is a cuboid in its basic form, as a housing element 10th serving ejector block of drilled solid aluminum recognizable.
  • a housing element 10th serving ejector block of drilled solid aluminum recognizable.
  • the housing element 10 designed as a four-fold stepped bore Nozzle receiving shaft 14, which has a merely offset from axially, transverse bores 30C, 32C, 16C and 16D interrupted Has shaft wall 14A and which in the same end wall 10C of the Ejectorblocks as the pressure gas bore 12 opens and (just) just before the opposite Ejector block end wall 10D ends blind.
  • a third, as a suction chamber serving suction gas bore 16 or suction gas well is simple configured and extends in the same plane as the pressure gas bore 12th and the nozzle receiving well 14, but with oppositely disposed Mouth and blind end, the mouth as Sauggaseinlrawö réelle 16 A serves.
  • a three-piece ejector-nozzle system 18 used sealingly. This consists of a compressed gas nozzle 18A and a first and a second diffuser 18B and 18C. All three individual nozzles are on at least each two axially spaced apart locations against tilting Shaft wall of the nozzle receiving shaft 14 supported. This is predominantly done through O-ring seals 20 (the O-rings were for clarity omitted; only the o-ring grooves are shown) and a light one Snug fit of the compressed gas nozzle 18A at the bottom of the hole. Through multiple gradations 18D, 18E, 18F, and 18G may wear the nozzles 18A through 18C into the nozzle receiving well with low wear 14 are inserted.
  • the nozzles are coaxial with each other arranged and internally biconical with optimized cross-sectional profile shaped; they therefore have cross-sectional zones at both ends.
  • the diffusers 18B and 18C are integral associated with them and eccentrically arranged finger-shaped spacers 22A and 22B ( Figure 2). These form slim extensions a location of the circumference in the area of the Düsenstim preparation. They disturb the suction gas inlet at the suction gas inlet gap 24A and 24B between adjacent nozzles almost not at all, because they are in the less flowy, from the suction chambers 26AB distant zones are arranged. In the one shown in Figures 1 and 2 Use position of the individual nozzles support the spacers 22A, 22B on the adjacent Düsenstimwand 18 A 'and 18 B' from.
  • the nozzles 18A to 18C are connected to the housing member 10 by a side end bolted terminal plate 28 secured and by means of the spacers 22A, 22B axially braced against each other or held in position.
  • the connection plate 28 has threaded bores 28A, 28B for a compressed gas connection and an exhaust connection on.
  • control valves 30, 32 are with O-rings 20 in stepped valve receiving bores 30C and 32C inserted. These valve receiving bores extend from an upper side wall 10A of the housing element 10, starting out into the nozzle receiving shaft 14 inside.
  • the control valves consist of a transversely perforated Guide sleeve 30A or 32A and a valve stem 308 or 32B with actuator piston 30E or 32E.
  • the valve tappets 30B, 32B and the adjusting pistons 30E, 32E (initially) separate components, so that they, their different Diameter, from opposite sides into the guide sleeve 30A, 32A can be used.
  • valve stem 30B, 32B is in a central bore 30E ', 32E' of the actuating piston 30E, 32E for connecting the two parts, z. B. by screwing, insertable.
  • One on the side wall 10A of the housing member 10 sealingly under sufficient pressure applied valve plate 34 has two pairs of through holes 36A, 36B and 38A, 38B showing the interior of the pressurized gas bore 12 on the one hand and the valve tappets 30B and 32B on the other hand with electromagnetic Connect switching valves 36 and 38, respectively. These switching valves 36, 38 are electrically driven and give the fluid path in which they are installed are free or block it off.
  • the float of the valve lifters 30B and 32B thus takes place pneumatically according to the pending on the valve tappets Gas pressures with open or closed switching valve 36 or 38th Dies happens taking into account different piston surfaces on the top and the plunger side of the adjusting pistons 30E, 32E.
  • the control valve 30 is shown in its open position in FIG the compressed gas path, as indicated by flow arrows, the nozzles 18A, 18B and 18C flows through.
  • the control valve 32 is closed during this time, because a vacuum should be built up and held. Once sufficient vacuum is reached, the control valve 30 can be closed to save energy become.
  • the control valve 32 are opened.
  • there pressurized gas flows over within the housing member 10 extending, in the Drawing dashed lines channels 32D compressed gas to the suction port 40A a vacuum port block 40. This is on the end wall 10D of the housing member 10 tightly bolted and houses a vacuum monitoring switch 40B.
  • This space-saving arrangement of the control valves 30 and 32 is defined by through holes 30A ', 32A' of the guide sleeves 30A, 32A in the area the pressure gas bore 12 allows.
  • Saugkammem 26A and 26B are sealed by the in the suction gas inserted check valves 26 B and 26 C separated from each other and have the well-known effect of faster achievement of the desired vacuum and the higher effectiveness of compressed air or energy use.
  • the suction chambers 26A and 26B are with annular clearance in the region of the Sauggasseintrittsspalte 24A and 24B through transverse to the suction gas bore 16 extending Connecting openings 16 C and 16 D connected to the nozzle receiving shaft 14.
  • the switch valves 36 and 38 opposite Side wall 10B of the housing member 10 through a blind plug 16E and 16D lockable cross bore on.
  • a multi-stage ejector according to the invention thus consists of a core serving as Ejektorblock flat cuboid housing element 10 with three substantially mutually parallel bores 12, 14, 16 in the a direction of the housing element and at right angles in a second Direction of the housing member 10 extending connecting holes 30 C, 32C, 10C, 16D, wherein the bore mouths receiving forehead and Side walls 10A to 10D with connecting plates 28, 34, 40 sealing screwed or sealed with blind plugs 16D, 16E.
  • the switching valve 38 is closed and vented on the outlet side, so that the valve tappet 30B moves back to the closed position. If the reduction of the vacuum is actively supported be, so now the switching valve 36 is electromagnetic and thereby the control valve 32 is pneumatically opened so that compressed air to the vacuum port 40A arrives.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (15)

  1. Pompe à éjecteur à étages multiples, constituée
       d'au moins un élément de carter (10) avec au moins une ouverture d'entrée de gaz comprimé (12A) et avec au moins une ouverture d'entrée de gaz d'aspiration (16A) et avec au moins une ouverture d'évacuation des gaz d'échappement (14A) et
       d'au moins un agencement de buses (système de buses d'éjection 18) avec au moins deux buses (buse de gaz comprimé 18A et diffuseurs 18B, 18C) disposées à l'intérieur de l'élément de carter (10) coaxialement l'une derrière l'autre et espacées axialement l'une de l'autre, avec au moins une ouverture d'entrée de gaz comprimé (24C), avec au moins une fente d'entrée de gaz d'aspiration (24A, 24B) entre des buses avoisinantes et une ouverture de sortie des gaz d'échappement, où
       l'élément de carter présente un puits de réception des buses (14) réalisé par exemple comme alésage, avec une paroi de puits sensiblement continue et au moins respectivement un perçage de paroi (ouvertures de liaison 16C, 16D) par étage d'éjecteur pour l'entrée de gaz d'aspiration dans la fente d'entrée de gaz d'aspiration (24A, 24B) et
       les buses (18A, 18B, 18C) sont munies sur leur pourtour extérieur d'au moins une garniture d'étanchéité (20) s'étendant tout autour, où le système de buses d'éjection (18) est poussé axialement dans le puits de réception (14) des buses,
       caractérisée    en ce que le système de buses d'éjection (18) est constitué d'un jeu de buses individuelles (18A, 18B, 18C) et de pièces d'écartement de buses,
    en ce que les buses (18A, 18B, 18C) présentent sur leur pourtour extérieur à chaque fois des éléments d'appui espacés axialement en vue d'un appui sans basculement ou pauvre en basculement par rapport à la paroi de puits et peuvent être poussées dans le puits de réception de buses (14) et
    en ce qu'il est prévu au moins un moyen de serrage, comme une plaque de connexion (28) pour la mise en tension axiale ou bien le maintien en position des buses individuelles (18A, 18B, 18C) et des pièces d'écartement de buses.
  2. Pompe à éjecteur selon la revendication 1, caractérisée en ce que les pièces d'écartement (22A, 22B) des buses, en laissant subsister les fentes d'entrée de gaz d'aspiration (24A, 24B) entre les extrémités frontales des buses sont insérées entre les buses avoisinantes (18A, 18B ; 18B, 18C) et peuvent être poussées dans le puits de réception de buses.
  3. Pompe à éjecteur selon la revendication 2, caractérisée en ce que les pièces d'écartement (22A, 22B) sont réalisées comme ergots élancés ou comme saillies similaires à une extrémité frontale de buse.
  4. Pompe à éjecteur selon la revendication 2 ou 3, caractérisée en ce qu'une seule pièce d'écartement (22A, 22B) est disposée dans une zone pauvre en écoulement de la zone périphérique des buses, donc d'une manière excentrique.
  5. Pompe à éjecteur selon l'une des revendications 1 à 4, caractérisée en ce que des enceintes d'aspiration (26A, 26B) sont prévues dans un perçage de gaz d'aspiration (16) disposé sensiblement parallèlement au puits de réception de buses (14).
  6. Pompe à éjecteur selon la revendication 5, caractérisée par des clapets anti-retour (26C, 26D) pouvant être poussés de manière étanche dans le perçage de gaz d'aspiration (16).
  7. Pompe à éjecteur selon l'une des revendications 1 à 6, caractérisée en ce que le puits de réception de buses (14) et/ou le perçage de gaz d'aspiration (16) sont réalisés comme perçages étagés quant à leur diamètre.
  8. Pompe à éjecteur selon l'une des revendications 1 à 7, caractérisée en ce que les buses (18A, 18B, 18C) et/ou les clapets anti-retour (26C, 26D) peuvent être poussés depuis un seul côté dans un perçage borgne (puits de réception de buses 14 et/ou perçage de gaz d'aspiration 16).
  9. Pompe à éjecteur selon l'une des revendications 1 à 8, caractérisée par un perçage de gaz comprimé (12) s'étendant sensiblement parallèlement au puits de réception de buses (14).
  10. Pompe à éjecteur selon l'une des revendications 1 à 9, caractérisée en ce que l'élément de boítier (10) est réalisé comme bloc cubique plat en métal léger ou en matériau synthétique.
  11. Pompe à éjecteur selon l'une des revendications 1 à 10, caractérisée en ce qu'il est prévu, à peu près à angle droit au puits de réception de buses (14), au moins un perçage de liaison vers le perçage de gaz comprimé (12) et/ou le perçage de gaz d'aspiration (16).
  12. Pompe à éjecteur selon la revendication 11, caractérisée en ce qu'au moins une vanne de commande (30, 32) est disposée dans un perçage de réception de vanne (30C) reliant le perçage de gaz comprimé (12) et le puits de réception de buses (14) et commande l'écoulement du gaz comprimé à travers l'ouverture de liaison.
  13. Pompe à éjecteur selon la revendication 12, caractérisée en ce que la vanne de commande (30 ; 32) présente une douille de guidage de vanné (30A ; 32A) percée au voisinage du perçage de gaz comprimé (12).
  14. Pompe à éjecteur selon la revendication 12 ou 13, caractérisée en ce que le perçage de gaz comprimé présente au moins un conduit de dérivation commandé par une vanne de commutation (36 ; 38) entre l'intérieur du perçage et la vanne de commande (30 ; 32) pour l'actionnement pneumatique de celle-ci.
  15. Pompe à éjecteur selon la revendication 14, caractérisée en ce que la vanne de commande (30 ; 32) présente un piston de positionnement à effet double (30E ; 32E) avec des faces de piston différentes des deux côtés.
EP00962511A 1999-09-20 2000-09-20 Pompe a ejecteur a etages multiples Expired - Lifetime EP1131562B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29916531U 1999-09-20
DE29916531U DE29916531U1 (de) 1999-09-20 1999-09-20 Ejektorpumpe
PCT/EP2000/009208 WO2001021961A1 (fr) 1999-09-20 2000-09-20 Pompe a ejecteur a etages multiples

Publications (2)

Publication Number Publication Date
EP1131562A1 EP1131562A1 (fr) 2001-09-12
EP1131562B1 true EP1131562B1 (fr) 2005-06-08

Family

ID=8079167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00962511A Expired - Lifetime EP1131562B1 (fr) 1999-09-20 2000-09-20 Pompe a ejecteur a etages multiples

Country Status (4)

Country Link
US (1) US6582199B1 (fr)
EP (1) EP1131562B1 (fr)
DE (2) DE29916531U1 (fr)
WO (1) WO2001021961A1 (fr)

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JP4132897B2 (ja) * 2002-03-19 2008-08-13 株式会社日本ピスコ 真空発生装置
DE10308420A1 (de) * 2003-02-27 2004-09-09 Leybold Vakuum Gmbh Testgaslecksuchgerät
FR2852364B1 (fr) * 2003-03-11 2006-07-21 Dispositif d'aspiration pneumatique
KR100629994B1 (ko) * 2005-12-30 2006-10-02 한국뉴매틱(주) 진공 이젝터 펌프
DE102008024434A1 (de) * 2008-05-20 2009-11-26 Fleissner Gmbh Vorrichtung zur Beaufschlagung von flächigem Material mittels unter Druck stehenden Medien
EP2331829B1 (fr) * 2008-09-09 2018-05-09 Dresser-Rand Company Bloc éjecteur supersonique
DE102009047085A1 (de) 2009-11-24 2011-06-01 J. Schmalz Gmbh Druckluftbetriebener Unterdruckerzeuger
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
JP6575013B2 (ja) 2012-12-21 2019-09-18 ピアブ・アクチエボラグ 楕円形の末広がりセクションを有する真空エジェクタノズル
GB2509182A (en) 2012-12-21 2014-06-25 Xerex Ab Vacuum ejector with multi-nozzle drive stage and booster
US9328702B2 (en) 2013-10-24 2016-05-03 Ford Global Technologies, Llc Multiple tap aspirator
US9297341B2 (en) 2014-01-20 2016-03-29 Ford Global Technologies, Llc Multiple tap aspirator with leak passage
KR101424959B1 (ko) 2014-04-08 2014-08-01 한국뉴매틱(주) 진공펌프
DE102014209427B4 (de) * 2014-05-19 2016-12-22 Aft Automotive Gmbh & Co. Kg Unterdruckpumpenanordnung sowie Verfahren zum Herstellen einer Unterdruckpumpenanordnung
DE102014008226A1 (de) * 2014-06-11 2015-12-17 Bilsing Automation Gmbh Vakuumerzeuger nach dem Ejektorprinzip
SE539775C2 (sv) * 2014-06-23 2017-11-28 Onishi Teknik Ab Flerstegs vakuumejektor
GB201418117D0 (en) 2014-10-13 2014-11-26 Xerex Ab Handling device for foodstuff
US10794402B2 (en) 2017-10-31 2020-10-06 General Electric Company Ejector and a turbo-machine having an ejector
PL426033A1 (pl) 2018-06-22 2020-01-02 General Electric Company Płynowe pompy strumieniowe parowe, a także układy i sposoby porywania płynu przy użyciu płynowych pomp strumieniowych parowych
US11560905B2 (en) * 2019-12-13 2023-01-24 Goodrich Corporation Multistage aspirator for inflatable assemblies
KR102344214B1 (ko) 2021-05-18 2021-12-28 (주)브이텍 진공 이젝터 펌프

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DE19727158C2 (de) * 1997-06-26 2001-01-25 Festo Ag & Co Steuervorrichtung

Also Published As

Publication number Publication date
DE29916531U1 (de) 2001-02-08
WO2001021961A1 (fr) 2001-03-29
DE50010514D1 (de) 2005-07-14
EP1131562A1 (fr) 2001-09-12
US6582199B1 (en) 2003-06-24

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