EP1212535A1 - Dispositif a produire du vide - Google Patents

Dispositif a produire du vide

Info

Publication number
EP1212535A1
EP1212535A1 EP01957838A EP01957838A EP1212535A1 EP 1212535 A1 EP1212535 A1 EP 1212535A1 EP 01957838 A EP01957838 A EP 01957838A EP 01957838 A EP01957838 A EP 01957838A EP 1212535 A1 EP1212535 A1 EP 1212535A1
Authority
EP
European Patent Office
Prior art keywords
suction
connection
vacuum generator
valve
housing
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
EP01957838A
Other languages
German (de)
English (en)
Other versions
EP1212535B1 (fr
Inventor
Jürgen Schnatterer
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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
Application filed by Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP1212535A1 publication Critical patent/EP1212535A1/fr
Application granted granted Critical
Publication of EP1212535B1 publication Critical patent/EP1212535B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F04F5/461—Adjustable nozzles

Definitions

  • the invention relates to a vacuum generator device that works according to the so-called ejector principle and is used to generate a vacuum in a space, for example, limited by a suction cup or by a suction plate, for handling objects and to specifically reduce the vacuum if necessary by an overpressure pulse.
  • a vacuum generator device known from German utility model 29903330 has a housing with inlet and suction connections arranged on opposite inlet and suction sides, wherein a suction nozzle device, which is interposed between the connections and oriented in the transverse direction, is accommodated in the housing, one on the suction connection Can cause suction.
  • a pressure accumulator In suction operation, a pressure accumulator is filled which can supply an overpressure pulse for ventilating the space to be evacuated, a valve arranged in extension of the suction nozzle device being used to control the overpressure pulse, which valve is designed as part of an air saving device.
  • the known device has a relatively voluminous structure. It is therefore the object of the present invention to create a vacuum generator device which can be realized with considerably more compact dimensions in order to favor an installation in a confined space.
  • a vacuum generator device with a housing, which on one inlet side is used to feed a fluid pressure medium Has inlet connection and on a suction side opposite the inlet side has a suction connection which can be connected or connected to a room to be evacuated, with an arranged in the housing, which extends in the same direction as an imaginary linear connecting line extending between the inlet connection and the suction connection, the rectified as well as the inlet connection oriented inlet opening is connected to the inlet connection and its suction opening is connected to the suction connection, and its outlet opening is connected to an outlet which is located on an outlet side of the housing oriented transversely to the imaginary connecting line and at the same time transverse to the longitudinal extension of the suction nozzle device, and with one in the housing alongside the suction nozzle device with the same orientation as this arranged elongated overpressure pulse device for generating a fluidic overpressure pulse ulses for the space to be evacuated, which contains a shuttle valve combined with a pressure accumulator, which has
  • the inlet connection and the suction connection lie opposite one another on opposite sides of the housing, the suction nozzle device and the pressure pulse device having the same orientation as an imaginary connecting line connecting the inlet connection and the suction connection being accommodated alongside one another in the housing. Since the correspondingly positioned overpressure pulse device also contains the pressure accumulator, external devices can be used
  • the vacuum generator device is characterized by a very rapid vacuum reduction in the space to be evacuated, if necessary, since the excess pressure building up in the pressure accumulator when the pressure medium supply is interrupted due to the resulting change in the pressure conditions can cause the changeover valve to switch over automatically, so that previously stored pressure medium can flow to the suction connection and cause a short-term build-up of pressure in the room to be evacuated.
  • this overpressure impulse can represent a ejection impulse, which results in a quasi-sudden detachment of an object that was still adhering to it.
  • the inlet connection and the suction connection are expediently placed on the inlet or suction side in such a way that their longitudinal axes coincide and lie on the imaginary connecting line.
  • the space-saving arrangement of a plurality of vacuum generator devices next to one another is favored if the housing has an elongated shape, the inlet side and the suction side being formed by the two end faces of the housing and the outlet side being formed by a laterally oriented longitudinal side of the housing.
  • the imaginary connecting line preferably coincides with the longitudinal axis of the housing or at least runs parallel to it.
  • suction nozzle device and the overpressure pulse device are arranged alongside one another along the longitudinal sides, parallel to one another.
  • Their overall lengths are expediently at least essentially match, and they are in particular at the same level with respect to the longitudinal direction of the housing.
  • the installation of the suction nozzle device and the overpressure pulse device is particularly simple if the associated components are accommodated in two receptacles of the housing which are arranged alongside one another.
  • One or both devices can be designed as cartridge-like units, which can expediently be inserted into associated receptacles of the housing from an opening at the front.
  • the inlet connection or the outlet connection are in particular equipped with plug-in connection devices which permit the connection of fluid lines in the context of a plug-in assembly.
  • a throttle device which can be variably adjusted with regard to the throttling intensity which is causing it can be interposed in the connection between the second valve opening of the shuttle valve and the suction connection.
  • the movable valve member is located between the two opposing valve openings, the second valve opening being formed by the mouth of a tubular body and being connected through the tubular body to the suction connection, and the pressure accumulator being by one Annular space enclosing tubular body is formed.
  • a pot-like structure of the valve member with a closed bottom and a running side wall forming an elastic sealing lip, the bottom serving as a closing part for the second valve opening and the sealing lip against the inner surface of the first valve opening is prestressed with the pressure accumulator transition space and thereby protrudes towards the pressure accumulator so that it can be bent inwards by the pressure medium flowing under operating pressure via the first valve opening and filling the pressure accumulator takes place past the valve member.
  • FIG. 1 shows a preferred embodiment of the vacuum generator device according to the invention in longitudinal section
  • Fig. 2 shows a detail of the vacuum generating device from Fig. 1 with a different switching position valve member of the shuttle valve and
  • the vacuum generator device 1 shown in the drawing has an elongated housing 2 with a preferably cuboidal outer contour.
  • the cross-sectional contour of the exemplary embodiment is rectangular, the section plane shown in FIG. 1 running parallel to the large-area side surfaces of the housing 2.
  • a round cross-sectional contour would also be possible with an externally cylindrical housing 2.
  • the longitudinal axis of the housing 2 is indicated by dash-dotted lines at 3.
  • An inlet connection 4 is provided on one of the axially oriented end faces of the housing 2, for which reason the end face in question is referred to as the inlet side 5.
  • the axially opposite end face of the housing 2 is equipped with a suction connection 6 and is therefore referred to as the suction side 7.
  • Each of the two connections 4, 6 is equipped with a plug connection device 8, which in each case permits a fluid-tight and preferably detachable connection of a further first or second fluid line 12, 13, which is only indicated in FIG. 3.
  • a connection of the inlet connection 4 to a pressure medium source P, which is in particular a compressed air source, can be established via the first fluid line 12.
  • the second fluid line 13 enables the connection of the suction connection 6 to a space 14 to be evacuated.
  • the latter is located inside a suction gripper 15, for example formed by a suction cup or a suction plate, of a vacuum handling device.
  • the suction gripper 15 can be attached with its open side to an object to be handled, after which the space 14 delimited on the one hand by the suction gripper 15 and on the other hand by the object in question can be evacuated by means of the vacuum generator device 1 in order to adhere the object to the vacuum Suction pad 15 to effect.
  • the object can now be lifted, transported and put down again, for example, by appropriate positioning of the suction gripper 15. To release the object, the previously evacuated space 14 is ventilated.
  • the suction effect required to evacuate the space 14 is generated by a suction nozzle device 16 integrated in the housing 2.
  • a suction nozzle device 16 integrated in the housing 2.
  • it has a elongated shape and is aligned such that its longitudinal axis 17 has the same direction as an imaginary connecting line 18 linearly connecting the inlet connection 4 to the suction connection 6.
  • the latter coincides with the longitudinal axis 3 of the housing 2, which at the same time is the longitudinal axis 22, 23 of the inlet connection 4 and the suction connection 6.
  • the latter at the same time reflect the mounting direction of the fluid lines 12, 13 to be connected and the flow direction of the pressure medium flowing through the relevant connection.
  • the suction nozzle device 16 has an inflow opening 24 which points in the same direction as the inlet connection 4 and is in constant communication with the inlet connection 4 via a first inflow channel 25a running inside the housing 2.
  • the inflow opening 24 is located at the front end region 26a of the suction nozzle device 16.
  • the suction nozzle device 16 further contains a suction opening 27 provided on the axially opposite rear end region 26b, which has the same orientation as the suction connection 6. It is connected to the suction connection 6 via a suction channel 28 running in the housing 2.
  • the suction nozzle device 16 also has an outflow opening 32 which is connected to an outlet 33 of the housing 2 which opens out to the outer surface of the housing 2 and thus leads to the atmosphere.
  • the corresponding outlet side 34 of the housing 2 is oriented transversely and preferably at right angles to the imaginary connecting line 18 and at the same time transversely to the longitudinal axis 17 of the suction nozzle device 16. In the exemplary embodiment, it is formed by a longitudinal side of the housing 2 which extends between the two end faces.
  • an overpressure pulse device 35 which also has an elongated shape, is accommodated alongside the same alignment as this. It enables a fluidic overpressure pulse to be generated as required for the space 14 to be evacuated.
  • the overall length of the overpressure pulse device 35 is expediently identical to that of the suction nozzle device 16.
  • the two devices 16, 35 are also at the same height.
  • the longitudinal axis 36 of the overpressure pulse device 35 preferably runs parallel to the longitudinal axis 17 of the suction nozzle device 16.
  • the overpressure pulse device 35 contains a shuttle valve 38 combined with a pressure accumulator 37.
  • a first valve opening 43 provided on the front end region 42a of the overpressure pulse device 35 facing the inlet side 5 is connected to the inlet port 4 via a second inflow channel 25b.
  • the two inflow channels 25a, 25b can at least partially coincide.
  • a second valve opening 44 of the shuttle valve 38 which is at a distance from the first valve opening 43 in the direction of the longitudinal axis 36, is connected to the suction port 6 via an impulse channel 45, which also runs inside the housing 2.
  • the impulse channel 45 and the suction channel 28 can also be formed at least partially by a common fluid channel.
  • transition space 46 Between the two valve openings 43, 44 there is an intermediate space, referred to as transition space 46, in which the valve member 47 of the shuttle valve 38 is located. This is sealed between an open position exposing the second valve opening 44 and a second valve opening 44. closing closed position movable.
  • the open position of the valve member 47 is shown in FIG. 1 and in solid lines in FIG. 3.
  • the closed position results from FIG. 2 and from the dash-dotted representation of FIG. 3.
  • the direction of movement of the valve member 47 coincides with the orientation of the longitudinal axis 36.
  • a third valve opening 48 of the shuttle valve 38 is connected to the pressure accumulator 37 integrated in the housing 2.
  • the third valve opening 48 is formed by the transition space 46.
  • the second valve opening 44 is from the front opening of a connection that runs parallel to the imaginary connecting line 18
  • Pipe body 52 formed, the pipe channel belongs to the impulse channel 45 and around which an annular space 53 extends, which forms the pressure accumulator 37.
  • the transition space 46 directly adjoins the annular space 53.
  • the boundary surfaces delimiting the annular space 53 and the transition space 46 and provided uniformly with reference number 54 expediently merge directly into one another.
  • the valve member 47 which is preferably used has an integrated non-return function. 1 and 2, it has a pot-like structure with a bottom 55 extending at right angles to the longitudinal axis 36 and a circumferential side wall projecting from the edge of the bottom in the direction of the pressure accumulator 37, which is designed as a radially elastically deformable sealing lip 56.
  • the sealing lip 56 bears against the associated boundary surface 54, a certain radial prestress also being expediently provided without fluidic pressurization.
  • a preferred operation of the vacuum generating device is explained below.
  • a pressure medium under operating pressure is fed through the inlet connection 4.
  • This feed can be brought about by a control valve 57, indicated by dash-dotted lines in FIG. 3, which is interposed in the connection between the pressure medium source and the inlet connection 4.
  • a control valve 57 designed as a 3 / way valve is indicated, which has two possible switching positions, whereby it either releases the connection between the pressure medium source P and the inlet port 4 or one
  • connection is interrupted while a connection is established between the inlet connection 4 and the atmosphere R.
  • a simpler 2/2-way valve for selectively releasing or interrupting the connection would be possible without simultaneous ventilation.
  • the pressure medium flows through the suction nozzle device 16, whereby it first passes through a jet nozzle channel 58, in which it is accelerated to supersonic, and then, after bridging a gap 59, enter a collecting nozzle channel 60 which leads to the outflow opening 32. From there, the pressure medium flows outside via the outlet 33.
  • the direction of flow of the pressure medium within the suction nozzle device 16 extends approximately parallel to the imaginary connecting line 18 up to the outflow opening 32.
  • the pressure medium is deflected to the side by a deflection wall 62 of the suction nozzle device 16, so that it ultimately transversely to the imaginary one Connection line 18 emerges from the housing 2.
  • the jet nozzle channel 58 forms, together with the collecting nozzle channel 60, an ejector device, which causes a suction effect in the intermediate space 59 through the pressure medium flowing through it. Since the intermediate space 59 communicates with the suction opening 27 via an internal connecting channel 63 of the suction nozzle device 16, the space 14 to be evacuated is suctioned off, in which an increasing vacuum is therefore gradually established.
  • the internal connecting channel 63 is guided along the side of the catching nozzle channel 60, which opens up a simple possibility of providing the inflow opening 24 and the suction opening 27 at mutually opposite end regions 26a, 26b of the suction nozzle device 16.
  • the pressure medium supplied acts on a first loading surface 64 of the valve member 47 formed by the base 55 and pointing away from both the second valve opening 44 and the pressure accumulator 37.
  • the latter is thus shifted into the closed position shown in FIG shuts off second valve opening 44.
  • the pressure medium causes the sealing lip 56 to bend radially inward, so that it is lifted off the associated boundary surface 54 according to FIG. 2 and the pressure medium can flow past the outer circumference of the valve member 47 into the annular space 53 of the pressure accumulator 37.
  • the pressure reservoir 37 is consequently filled with pressure medium until a reservoir corresponding to the actuating pressure is pressure is present.
  • the valve member 47 remains in the closed position.
  • a comparable overpressure pulse occurs when a control valve 57 without a venting function is used.
  • the pressure drop in the region of the first application surface 64 then results exclusively from the connection of the first valve opening 43 to the outlet 33 open to the atmosphere via the suction nozzle device 16.
  • the overpressure pulse can therefore also be referred to as a discharge pulse.
  • a throttling device 67 can be switched into the connection between the second valve opening 44 and the suction port 6, the throttling intensity being variably adjustable in order to reduce the intensity of the overpressure pulse or the speed to adjust the pressure build-up in the previously evacuated room 14 as required.
  • the vacuum generator device 1 has a particularly advantageous housing structure.
  • the housing 2 is divided at right angles to the longitudinal axis 3 and has a main part 68 and a cover part 69 which is firmly connected thereto by sealing, for example by ultrasound welding.
  • the two devices 16, 35 are completely accommodated in the main part 68, which is parallel to one another Receptacles 70, 71 which are open towards the cover part 69 and into which the components of the suction nozzle device 16 and the overpressure pulse device 35 were inserted before the cover part 69 was attached.
  • the suction nozzle device 16 has a cartridge-like structure and is inserted as a structural unit in the associated receptacle 70.
  • the outflow opening 32 communicates over a partial area of the receptacle 70 with the outlet 33, which here is formed by a partial opening in the peripheral wall delimiting the receptacle 70.
  • the overpressure pulse device 35 is designed in such a way that the boundary surfaces 54 directly from the
  • the tubular body 72 is part of an insert 74, which with a holding section 75 corresponding to the diameter of the receptacle 71 is inserted into the receptacle 71 in question, from which the tubular body 52 protrudes toward the inlet side 5.
  • the tubular body 52 is somewhat shorter than the receptacle 71, so that a distance remains between the end of the tubular body 52 and the attached cover part 69, which defines the transition space 46 into which the valve member 47 is inserted.
  • Both the suction nozzle device 16, which is designed as a structural unit, and the insert part 74 of the overpressure pulse device 35 are provided on the circumference with seals in order to ensure the necessary sealing to the housing 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

L'invention concerne un dispositif pour produire du vide, qui comporte un boîtier (2) avec un raccord d'admission (4) et un raccord d'aspiration (6) opposé. Le boîtier (2) contient un dispositif de tube de Venturi (16) et un dispositif d'impulsions de surpression (35) monté à côté le long dudit dispositif de tube de Venturi, avec le même alignement et servant à produire une impulsion de surpression fluidique pour l'espace dans lequel le vide doit être effectué. Le dispositif d'impulsions de surpression (35) contient une soupape à deux voies (38) combinée avec l'accumulateur de pression (37), soupape dont l'élément est piloté en fonction de la pression différentielle régnant à son niveau, de sorte que l'accumulateur de pression se trouve en communication fluidique soit avec le raccord d'entrée (4), soit avec le raccord d'aspiration (6).
EP01957838A 2000-07-07 2001-06-11 Dispositif a produire du vide Expired - Lifetime EP1212535B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20011839U 2000-07-07
DE20011839U DE20011839U1 (de) 2000-07-07 2000-07-07 Vakuumerzeugervorrichtung
PCT/EP2001/006563 WO2002004818A1 (fr) 2000-07-07 2001-06-11 Dispositif a produire du vide

Publications (2)

Publication Number Publication Date
EP1212535A1 true EP1212535A1 (fr) 2002-06-12
EP1212535B1 EP1212535B1 (fr) 2008-12-03

Family

ID=7943683

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01957838A Expired - Lifetime EP1212535B1 (fr) 2000-07-07 2001-06-11 Dispositif a produire du vide

Country Status (6)

Country Link
US (1) US6729852B2 (fr)
EP (1) EP1212535B1 (fr)
JP (1) JP2004502905A (fr)
AT (1) ATE416315T1 (fr)
DE (2) DE20011839U1 (fr)
WO (1) WO2002004818A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20115549U1 (de) 2001-09-21 2001-12-06 Festo Ag & Co Vakuumhandhabungsvorrichtung
DE102004047853A1 (de) * 2004-10-01 2006-04-20 Festo Ag & Co. Steuereinrichtung für wenigstens ein Saugelement
US7694520B2 (en) * 2005-03-09 2010-04-13 Fibonacci International Inc. Plasma-vortex engine and method of operation therefor
US7540309B2 (en) 2005-07-11 2009-06-02 Delaware Capital Formation, Inc. Auto-release vacuum device
SE530787C2 (sv) * 2007-01-16 2008-09-09 Xerex Ab Ejektoranordning med luftningsfunktion
DE102008005241A1 (de) 2008-01-19 2009-07-30 Festo Ag & Co. Kg Vakuumerzeugervorrichtung und Verfahren zum Betreiben derselben
CN102089528B (zh) * 2008-11-21 2015-01-14 费斯托股份有限两合公司 真空控制装置
US9108319B2 (en) * 2011-02-01 2015-08-18 Delaware Capital Formation, Inc. Electric suction cup
DE102014011327B4 (de) 2014-07-30 2016-08-04 Festo Ag & Co. Kg Vakuumerzeugervorrichtung
DE102015202603A1 (de) * 2015-02-12 2016-08-18 J. Schmalz Gmbh Unterdruckerzeugervorrichtung und Schlauchheber mit einer Unterdruckerzeugervorrichtung
KR101659517B1 (ko) 2016-03-15 2016-09-23 (주)브이텍 진공 펌프를 포함하는 진공 그리퍼 유닛
EP3236083B1 (fr) * 2016-04-21 2018-12-12 Piab Ab Dispositif éjecteur à vide
KR101699721B1 (ko) 2016-09-01 2017-02-13 (주)브이텍 진공 펌프 및 그 어레이
EP3427772B1 (fr) * 2017-07-10 2023-05-03 B. Braun Avitum AG Unité d'oxygénation avec une soupape de surpression
CN108273805B (zh) * 2018-04-09 2023-05-26 上汽大众汽车有限公司 涵道式真空发生器及其真空管体
KR102415295B1 (ko) * 2020-03-30 2022-06-30 황규건 진공 이젝터

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DE3818338A1 (de) 1988-05-30 1989-12-07 Schenck Ag Carl Dosiervorrichtung fuer die feindosierung von schuettgut
DE19512700A1 (de) 1995-04-07 1996-10-10 Teves Gmbh Alfred Strahlpumpe
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Also Published As

Publication number Publication date
US6729852B2 (en) 2004-05-04
US20020114705A1 (en) 2002-08-22
JP2004502905A (ja) 2004-01-29
DE20011839U1 (de) 2000-12-14
ATE416315T1 (de) 2008-12-15
WO2002004818A1 (fr) 2002-01-17
DE50114542D1 (de) 2009-01-15
EP1212535B1 (fr) 2008-12-03

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