EP1348874B1 - Silencieux pour air comprimé - Google Patents

Silencieux pour air comprimé Download PDF

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Publication number
EP1348874B1
EP1348874B1 EP03005028A EP03005028A EP1348874B1 EP 1348874 B1 EP1348874 B1 EP 1348874B1 EP 03005028 A EP03005028 A EP 03005028A EP 03005028 A EP03005028 A EP 03005028A EP 1348874 B1 EP1348874 B1 EP 1348874B1
Authority
EP
European Patent Office
Prior art keywords
section
silencer
vacuum generator
generator device
compressed air
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 - Fee Related
Application number
EP03005028A
Other languages
German (de)
English (en)
Other versions
EP1348874A1 (fr
Inventor
Manfred Zindl
Yvonne Krehl
Markus Bretzler
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 EP1348874A1 publication Critical patent/EP1348874A1/fr
Application granted granted Critical
Publication of EP1348874B1 publication Critical patent/EP1348874B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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

Definitions

  • the invention relates to a vacuum generator device, with a compressed air silencer and this upstream Ejektor adopted for vacuum generation, wherein the Ejektor adopted a jet nozzle, to which a catching nozzle connects to the compressed air silencer with a rear attachment portion is connected, wherein to the attachment portion in the longitudinal direction Silencer section connects, which a Schalldämpf notion of porous Schalldämpfmaterial and has a in the longitudinal direction up to a front-side outflow opening continuous outflow channel has, within the Schalldämpfabiteses a tapering towards the discharge opening Has shape.
  • a vacuum generator device described in WO 00/50776 A1 this type contains a compressed air silencer, in connection with a vacuum generation Ejector device is used.
  • the silencer is with its rear attachment portion at the outlet opening the Ejektor adopted connected and used for Damping of the sound from the catching nozzle of the ejector device escaping compressed air.
  • the well-known compressed air silencer has a rear attachment section for fixing to the ejector device, which is followed by a muffling section, the one at Outer circumference covered Schalldämpfraj of porous Schalldämpfmaterial has.
  • a compressed air silencer penetrating outflow channel present on the front opens out with an outflow to the environment.
  • the outflow channel has a shape tapering towards the outflow opening.
  • the silencer body sits in a sleeve-like housing, through the it is covered on the outer circumference.
  • the well-known compressed air silencer has the advantage that it pollutes less quickly than one in the front Range of closed silencers. However, it turns out Loss of sound-absorbing effect.
  • a pneumatic drill or hammer out with a two-piece silencer is equipped.
  • a conical part made of porous Material exists at one inside with muffler rails provided housing of the muffler.
  • At the top has the cone-shaped Part about an opening.
  • Around the cone-shaped part is located around a space formed by a tubular housing, in which the air flows out, the pores of the cone-shaped Partly penetrates.
  • the Schalldämpfianu is formed on the outer circumference without cover, wherein its outer peripheral surface has an outflow surface for its Wall transverse to the longitudinal direction by flowing compressed air forms that extending in the attachment portion channel section the outflow channel steplessly in the silencer section extending channel section passes, and that the outflow diameter at the outflow opening of Outflow channel is greater than the smallest diameter of the Mud nozzle of the ejector device.
  • the compressed air can also be formed at the coverless Outlet of the Schalldämpf stresses emanate, so that the the front-side discharge opening exiting flow is reduced and caused by the free jet Volume is reduced.
  • the stepless channel course has this has the advantage that vortices are avoided the passage of compressed air through the wall of the Soundproofing could prevent or affect. It is therefore already achieved a high sound-absorbing effect at relatively small length dimensions.
  • the upstream Ejektor In conjunction with the upstream Ejektor founded special Advantages of the compressed air silencer, because its outlet diameter at the outlet is larger than the smallest diameter of the catching nozzle of the upstream ejector device.
  • the running in the attachment portion channel portion of the Outflow channel may have a constant cross-section and steplessly into the correspondingly formed inlet cross-section of the channel section running in the sound-damping section pass.
  • the channel wall can thereby in the transition area be slightly bent.
  • a design is considered particularly advantageous at the outflow channel over its entire length away a tapered to the discharge opening shape has and thus already rejuvenated in the attachment section. This results in a particularly effective Flow pattern.
  • the tapered shape can be especially through a conical channel course manufacturing technology very simple realize.
  • the fastening portion may have a fastening body, the deviating from a material of the Schalldämpfianus Material exists, the two bodies, for example firmly connected by welding or gluing are.
  • a particularly advantageous design is the Compressed air silencer a one-piece component, the consistently consists of the porous Schalldämpfmaterial. As has been shown falls in the channel design according to the invention the structural mechanical load in the longitudinal direction the compressed air silencer is relatively low, so that even with the mentioned one-piece design the required Strength values are achieved and thus a considerable Reduction of manufacturing costs is possible.
  • the Schalldämpfmaterial may, for example, to Sintered bronze, sintered brass, polyethylene sintered material, stainless steel sintered material or another suitable sintered material act.
  • the Schalldämpfianu can outside, for example, circular cylindrical be designed. It has proved to be particularly advantageous However, proven when the Schalldämpfianumpfianu outside a has a tapered shape according to the outflow channel, so that he expediently over its length away one has constant wall thickness. This way results despite the conical shape of the discharge channel in the wall the Schalldämpf analysess no significant gain the flow resistance to the outflow, so that the exiting through the discharge flow and thus the outflow noise is further reduced.
  • the drawing shows a reference numeral in its entirety 1 designated vacuum generating device. This contains one Ejektor owned 2, with a compressed air silencer. 3 the design of the invention is equipped.
  • the ejector device 2 has a housing 4, which has a Blasting nozzle 5 and an adjoining catching nozzle 6 has or defines.
  • the jet nozzle 5 has a feed opening 7, at the operation of the vacuum generating device 1 compressed air under atmospheric pressure is fed.
  • the catching nozzle 6 closes at. Between the outlet opening of the jet nozzle 5 and the Inlet opening of the catching nozzle 6 is an intermediate space, which defines a suction chamber 8, which via a channel is connected to a suction opening 12.
  • the at the feed opening. 7 fed compressed air when flowing through the jet nozzle 5 accelerates and calls when crossing into the catching nozzle 6 in the suction 8 shows a negative pressure.
  • it is one with a suction cup or a suction plate equipped suction pads.
  • the fed Compressed air is combined with the extracted air by widening to the outlet opening 13 towards Mouthpiece 6 blown through to the atmosphere.
  • Compressed air silencer 3 By connected to the outlet opening 13 of the catching nozzle 6 Compressed air silencer 3 is the Ausströmge Hursch compressed air to an acceptable level.
  • the compressed air silencer 3 is an elongated, slender Component with a rear attachment portion 15, on which connects in the longitudinal direction of a Schalldämpfabites 16. With the attachment portion 15 of the compressed air silencer 3 in the region of the outlet opening 13 on the housing 4 of the ejector device 2 attached.
  • the attachment portion has 15 via a trained as an external thread fastening thread 17, with which he is in a corresponding internal thread is screwed to the outlet opening 13. If necessary sealing measures can be provided, for example Sealing or adhesive.
  • the silencing section 16 is in both embodiments exclusively from a Schalldämpfmaschine 18 of porous Schalldämpfmaterial.
  • Schalldämpfmaterial recommends a sintered material, for example sintered bronze, sintered brass, Polyethylene sintered material or stainless steel sintered material. Fine and finest pores or spaces in this Material allows passage of compressed air sufficiently high pressure gradient.
  • the compressed air silencer 3 is in the longitudinal direction of a Outflow channel 22 traversed linearly. With its back opens he to the free end face of the attachment portion 15th With its opposite end it leads to the attachment section 15 axially opposite front of Schalldämpf stressess 18, wherein this mouth as a discharge opening 23 is designated.
  • the discharge channel 22 has at least within the Schalldämpfabiteses 16 a tapering towards the discharge opening 23 Shape.
  • This tapered shape results suitably from a conically tapered Longitudinal course.
  • the cross-section decrease is preferably continuous or evenly.
  • the Schalldämpfianus 18 is not covered on its outer circumference. As a result, its transverse to the longitudinal direction forms Outer peripheral surface an outflow surface 24, at which the Wall 25 of the Schalldämpf stressess 18 transverse to the longitudinal direction and escaping around in particular radially flowing through compressed air can (see flow arrows 26).
  • the outflow opening 23 When passing the compressed air through the compressed air silencer 3 enter parts of the compressed air as a free jet the outflow opening 23, while other parts according to the Flow arrows 26 pass through the sleeve-like wall 25 and exit at the outflow surface 24.
  • the outflow surface 24 extends over the entire length and the entire outer circumference the Schalldämpf stressess 18 away.
  • Stepless transition without step-like extension or Narrowing ensures an undisturbed flow without turbulence in the transition area, which controls the entry of compressed air in could affect the wall of Schalldämpf stresses 18.
  • the attachment portion 15 of a mounting body 32 the a material other than the one firmly attached to it Schalldämpfianu 18.
  • the mounting body 32 may, for example made of plastic or metal.
  • the tapered channel course the outflow 22 on the lying in the Schalldämpfève 18 Restrict second channel section 28.
  • the fastening body 32 extending first channel portion 27 throughout a constant Cross section, wherein this cross section of the inlet cross section of the second channel section 28 corresponds. from that results in the transition area only slightly kinking Wall course of the outflow 22, based on the flow conditions hardly adversely affects.
  • FIG. 2 will nevertheless be optimal viewed, in which the tapered channel course extends over the entire length of the outflow 22 away.
  • the largest channel cross section is located here expediently at the in the region of the end face of the attachment portion 15 lying inflow opening 23 'of the outflow channel 22, the smallest channel cross-section at the outflow opening 23rd
  • the consistently tapering channel profile of the outflow channel 22 can be realized particularly advantageous if the Compressed air silencer in one piece from porous silencer material is made, as in the embodiment according to Fig. 2 is the case.
  • the attachment section 15 from the Schalldämpfmaterial the Schalldämpfabiteses 16 so that elaborate multi-component manufacturing process unnecessary.
  • the compressed air silencers 3 are in principle for all uses suitable where the sound of escaping compressed air should be reduced. You could, for example, related used with valves or pneumatic drives become. Particularly advantageous proves their use in combination with an ejector device 2, wherein Here the advantageous possibility exists, the geometry of the Compressed air muffler 3 optimally to the design of Ejektor worn 2 adapt.
  • a particularly good sound attenuation is achieved when the present at the discharge port 23 discharge diameter D A of the outflow 22 is as small as possible, but always larger than the smallest diameter D K of the catching nozzle 6 of the ejector. 2
  • the compressed air silencer 3 has expediently total a rod or bar-shaped figure.
  • the cross-sectional contour on the outer circumference is expediently circular.
  • Fig. 1 shows an embodiment of the compressed air silencer 3, in which the Schalldämpfianu 18 outside overall has a circular cylindrical shape. In connection with him concentrically penetrating, tapered outflow channel 22, this leads to the outflow opening 23 towards an enlarging Wall thickness of the wall 25 of the Schalldämpfianus 18. This can cause the flow resistance for the wall 25 flowing through the compressed air to the front the Schalldämpfianus 18 increases. Therefore, expediently a design comparable to that shown in Fig. 2 Art preferred, in which the Schalldämpfsammlung 18 outside a according to the discharge channel 22 to the front has a rejuvenating shape.
  • the wall thickness of the Schalldämpf stresses 18 in the front area are kept relatively low. It exists in particular the advantageous possibility, the Schalldämpfianu 18 over its entire length a constant To give wall thickness so that it is in the radial direction is flowed through uniformly and optimal efficiency established. Conveniently, the Schalldämpfmaschine 18 outside a conically tapered shape.

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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)
  • Exhaust Silencers (AREA)

Claims (11)

  1. Dispositif d'obtention du vide, comprenant un amortisseur de bruit d'air comprimé (3) et un agencement d'éjection placé en amont de celui-ci pour l'obtention du vide, dans lequel l'agencement d'éjection (2) comprend un ajutage d'éjection (5) suivi d'un ajutage d'arrêt (6) auquel l'amortisseur de bruit d'air comprimé (3) est raccordé par une section de fixation arrière (15), la section de fixation (15) étant suivie dans la direction longitudinale d'une section amortissant le bruit (16) qui présente un corps amortissant le bruit (18) en matériau poreux amortissant le bruit et dispose d'un canal d'évacuation (22) traversant dans la direction longitudinale jusqu'à un orifice d'évacuation avant (23), le canal ayant à l'intérieur de la section amortissant le bruit (16) une forme se rétrécissant en direction de l'orifice d'évacuation (23), caractérisé en ce que le corps amortissant le bruit (18) est réalisé sans couverture sur sa circonférence extérieure, sa surface circonférentielle extérieure formant une surface d'évacuation (24) pour l'air comprimé passant à travers sa paroi (25) transversalement à la direction longitudinale, en ce que la section de canal (27), s'étendant dans la section de fixation (15), du canal d'évacuation (22) passe progressivement à la section de canal (28) s'étendant dans la section amortissant le bruit (16), et en ce que le diamètre d'évacuation (DA) au niveau de l'orifice d'évacuation (23) du canal d'évacuation (22) est supérieur au plus petit diamètre (DK) de l'ajutage d'arrêt (6) de l'agencement d'éjection (2).
  2. Dispositif d'obtention du vide selon la revendication 1, caractérisé en ce que la section de canal (27), s'étendant dans la section de fixation (15), du canal d'évacuation (22) présente une section transversale constante, cette section transversale correspondant à une section transversale d'entrée de la section de canal (28) s'étendant dans la section amortissant le bruit (16).
  3. Dispositif d'obtention du vide selon la revendication 1, caractérisé en ce que le canal d'évacuation (22) présente sur toute sa longueur une forme se rétrécissant en direction de l'orifice d'évacuation (23).
  4. Dispositif d'obtention du vide selon l'une des revendications 1 à 3, caractérisé en ce que la forme se rétrécissant du canal d'évacuation (22) est une forme conique.
  5. Dispositif d'obtention du vide selon l'une des revendications 1 à 4, caractérisé en ce que la section de fixation (15) présente un corps de fixation (32) composé d'un matériau différent du matériau du corps amortissant le bruit (18), le corps de fixation étant raccordé rigidement au corps amortissant le bruit (18), de façon avantageuse par un raccordement soudé ou collé.
  6. Dispositif d'obtention du vide selon l'une des revendications 1 à 4, caractérisé par une construction d'une seule pièce de l'amortisseur de bruit d'air comprimé en matériau poreux amortissant le bruit.
  7. Dispositif d'obtention du vide selon l'une des revendications 1 à 6, caractérisé en ce que la section de fixation (15) dispose d'un filetage de fixation (17) réalisé comme un filetage extérieur.
  8. Dispositif d'obtention du vide selon l'une des revendications 1 à 7, caractérisé en ce que le matériau poreux amortissant le bruit est du bronze fritté, du laiton fritté, un matériau fritté à base de polyéthylène ou un matériau fritté à base d'acier spécial.
  9. Dispositif d'obtention du vide selon l'une des revendications 1 à 8, caractérisé en ce que le corps amortissant le bruit (18) présente extérieurement une forme cylindrique à base circulaire.
  10. Dispositif d'obtention du vide selon l'une des revendications 1 à 8, caractérisé en ce que le corps amortissant le bruit (18) présente extérieurement une forme se rétrécissant en correspondance avec le canal d'évacuation (22), en particulier de telle sorte qu'il possède sur sa longueur une épaisseur de paroi constante.
  11. Dispositif d'obtention du vide selon la revendication 10, caractérisé en ce que le corps amortissant le bruit (18) présente extérieurement une forme se rétrécissant de façon conique.
EP03005028A 2002-03-30 2003-03-06 Silencieux pour air comprimé Expired - Fee Related EP1348874B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20205068U DE20205068U1 (de) 2002-03-30 2002-03-30 Druckluft-Schalldämpfer
DE20205068U 2002-03-30

Publications (2)

Publication Number Publication Date
EP1348874A1 EP1348874A1 (fr) 2003-10-01
EP1348874B1 true EP1348874B1 (fr) 2005-07-20

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EP03005028A Expired - Fee Related EP1348874B1 (fr) 2002-03-30 2003-03-06 Silencieux pour air comprimé

Country Status (3)

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US (1) US6899198B2 (fr)
EP (1) EP1348874B1 (fr)
DE (2) DE20205068U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012015504A1 (de) 2012-08-03 2014-02-06 Festo Ag & Co. Kg Bauteil mit Einschraubabschnitt und damit ausgestattete Baugruppe
DE202014102969U1 (de) 2013-07-11 2014-10-22 Robert Meyer Druckluftschalldämpfer

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DE10343439A1 (de) * 2003-09-12 2005-04-14 DAS-Dünnschicht Anlagen Systeme GmbH Dresden Einlasselement an einer Entsorgungseinrichtung für Schadstoffe enthaltende Prozessabgase
JP2005163619A (ja) * 2003-12-02 2005-06-23 Smc Corp 真空発生用ユニット
US7267297B2 (en) * 2004-09-02 2007-09-11 The Boeing Company Integrated axially varying engine muffler, and associated methods and systems
US7549509B2 (en) * 2005-04-21 2009-06-23 Ingersoll-Rand Company Double throat pulsation dampener for a compressor
US7905321B2 (en) * 2007-02-12 2011-03-15 Ballard Iii Ebbin C Inserts for engine exhaust systems
DE102007011455A1 (de) 2007-03-09 2008-09-11 Festo Ag & Co. Druckluft-Schalldämpfer für pneumatische Anwendungen
KR20100055236A (ko) * 2008-11-17 2010-05-26 삼성전자주식회사 반도체 소자 테스트 장치 및 이를 사용한 반도체 소자 테스트 방법
DE102011018932B4 (de) 2011-04-28 2018-07-12 Multivac Sepp Haggenmüller Se & Co. Kg Schalldämpfvorrichtung und Verpackungsmaschine mit einer solchen Schalldämpfvorrichtung
DE102018209751A1 (de) 2018-06-18 2019-12-19 Festo Ag & Co. Kg Druckluft-Schalldämpfer und damit ausgestattetes Druckluftgerät
DE102019109128A1 (de) * 2019-04-08 2020-10-08 Homag Gmbh Vorrichtung und Verfahren zum Beschichten von Werkstücken
DE102019130610B3 (de) * 2019-11-13 2021-01-21 Nidec Gpm Gmbh Schalldämpfungsvorrichtung für Vakuumpumpen
CN111351272A (zh) * 2020-03-19 2020-06-30 青岛海尔空调器有限总公司 喷射器及空气调节装置

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SE513991C2 (sv) * 1999-02-26 2000-12-11 Piab Ab Filter för en vakuumpump av ejektortyp med ljuddämpare
US6158546A (en) * 1999-06-25 2000-12-12 Tenneco Automotive Inc. Straight through muffler with conically-ended output passage
US6220387B1 (en) * 1999-10-21 2001-04-24 Mathew S. Hoppes Exhaust muffler
RU2179225C2 (ru) * 1999-12-29 2002-02-10 Буртолик Борис Иванович Глушитель шума пневматических перфораторов
DE10009164C1 (de) 2000-02-26 2001-07-19 Festo Ag & Co Mehrzahl von Vakuumerzeugereinheiten
DE10027873C1 (de) 2000-06-06 2002-02-07 Festo Ag & Co Pneumatische Drucksteuereinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012015504A1 (de) 2012-08-03 2014-02-06 Festo Ag & Co. Kg Bauteil mit Einschraubabschnitt und damit ausgestattete Baugruppe
DE102012015504B4 (de) * 2012-08-03 2021-06-24 Festo Se & Co. Kg Bauteil mit Einschraubabschnitt und damit ausgestattete Baugruppe
DE202014102969U1 (de) 2013-07-11 2014-10-22 Robert Meyer Druckluftschalldämpfer

Also Published As

Publication number Publication date
DE20205068U1 (de) 2002-08-29
US6899198B2 (en) 2005-05-31
DE50300783D1 (de) 2005-08-25
EP1348874A1 (fr) 2003-10-01
US20030183447A1 (en) 2003-10-02

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