EP0884456A2 - Silencieux - Google Patents

Silencieux Download PDF

Info

Publication number
EP0884456A2
EP0884456A2 EP98110063A EP98110063A EP0884456A2 EP 0884456 A2 EP0884456 A2 EP 0884456A2 EP 98110063 A EP98110063 A EP 98110063A EP 98110063 A EP98110063 A EP 98110063A EP 0884456 A2 EP0884456 A2 EP 0884456A2
Authority
EP
European Patent Office
Prior art keywords
hollow body
silencer according
tubular hollow
thickness
jacket
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.)
Withdrawn
Application number
EP98110063A
Other languages
German (de)
English (en)
Other versions
EP0884456A3 (fr
Inventor
Jean-Claude Philippron
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.)
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP0884456A2 publication Critical patent/EP0884456A2/fr
Publication of EP0884456A3 publication Critical patent/EP0884456A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/16—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with exhaust gas flow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials

Definitions

  • the present invention relates to a silencer for the guns of blasting systems, such as sandblasting systems, shot blasting systems or dry ice blasting systems.
  • a particle-shaped one becomes available Material, such as sand or ice particles, and then greatly accelerated thrown out through an outlet nozzle, usually on a hand gun.
  • the acceleration can preferably by means of a rapidly flowing gas Air.
  • the exiting material is then transferred to a workpiece by the respective user or a work surface, such as a wall, to work on.
  • a work surface such as a wall
  • At the processing is usually a cleaning or the removal of one Surface layer on the workpiece or the work surface.
  • a suitable dry ice blasting system also cleaning a sensitive one Facade wall of graffiti smears, because such processes do not have an abrasive effect.
  • Sensitive technical devices can also be used in production systems can be cleaned easily in this way. Beyond exist other diverse areas of application of these systems.
  • noise barriers made of sound-absorbing material can be used that are built around the individual systems. These soundproof walls have the disadvantage, however, that they are the actual operator of the respective Do not protect the machine itself and make it irreparable to avoid it health damage if only this noise protection measure is used continue to wear sound insulation directly on the ears. On the other hand these measures also do not achieve the damping that occurs with a such an enormous noise development would be desirable.
  • silencers have already been developed for blasting systems that require a reduction allow the sound pressure level.
  • Air Liquide GmbH, Düsseldorf, for example developed such a sound absorber its noise reduction effect is based on its special geometric shape.
  • Silencers can reduce the noise level by around 9 dB (A). In many cases, however, this is still not sufficient, for example with a typical noise level of 112 dB (A) on the gun of a blasting system this is only a reduction to about 103 dB (A), whatever still corresponds to a very considerable noise development.
  • Helmholtz resonators are known in the art of sound attenuation, in those that air standing in a hole (or slot) by the sound waves is excited to vibrate. On these swinging in the hole reveal A connected air cavity acts as a spring.
  • Such a type of lining is from the German utility model DE 19 82 739 U1, as well as from German published application DE 195 17 364 A1 known.
  • the lining with conventionally known sound insulation materials e.g. seaweed, cork, grass fibers, mineral wool
  • sound-absorbing materials e.g. cotton wool, Felt, wood fiber elements
  • a muffler which is a tubular Hollow body for the passage of a medium inside with outlets, preferably holes or slots, and a the tubular hollow body comprehensive jacket with behind the respective outlets of the tubular hollow body arranged, mutually and externally closed cavities
  • a fiber-reinforced plastic where as fibers all fibers which are technically suitable for reinforcement, such as glass fibers, Carbon fibers, aramid fibers or Kevlar fibers can be used can and the fiber-reinforced plastic additionally balls, preferably Contains glass balls, which in a particularly preferred embodiment are designed as hollow spheres according to the present invention.
  • the balls can have a diameter between 0.5 mm and 1.5 mm, preferably 0.5 - 0.8 mm.
  • their diameter is preferably 0.1 mm to 0.5 mm.
  • the hollow spheres can also be coated with a sound-absorbing gas, preferably with Sulfur hexafluoride.
  • the proportion of balls in the fiber-reinforced plastic is preferably between 75% by volume and 95% by volume, here one embodiment with around 85% by volume the special preference applies.
  • the outer end of the hollow body shell is used in silencers according to the present invention preferably made of a fiber-reinforced plastic educated.
  • a further jacket made of lead can be provided, which is outside the Hollow body jacket is arranged.
  • This can have a thickness of 0.5 mm to 2 mm, preferably 1 mm.
  • Another rubber jacket can also be provided, which is also outside of the hollow body shell is arranged. This rubber coat can do it 0.5 min to 1 mm, preferably 0.8 mm thick.
  • the wall of the tubular hollow body is preferably made of PVC.
  • the thickness of its wall is in a preferred embodiment present invention 0.8 mm to 2 mm, in a particularly preferred embodiment 1.2 mm.
  • Another particularly preferred embodiment of the present invention is characterized in that the wall of the tubular hollow body PVC is made and outside of the hollow body shell another one Sheath made of lead and then another one surrounding it Rubber jacket is present.
  • the thickness of the wall of the tubular hollow body is preferably between 0.8 mm and 2 mm, that of the further lead jacket 0.5 mm to 2 mm and that of the rubber jacket 0.5 mm to 1 mm.
  • the present invention makes it possible to use blasting systems even at locations use that cannot be shielded separately, such as outdoors, without causing unreasonable noise pollution.
  • a major advantage of the present invention is thus that it is capable of the field of application of blasting technology, in particular dry ice blasting technology to expand considerably since use cases are now also in question come, so far due to the high noise pollution from the blasting systems were excluded.
  • Fig. 1 shows a schematic representation of a silencer according to the present invention in longitudinal section.
  • the tubular hollow body 1 can be seen, through which a jet medium, preferably dry ice particles 2 , which is indicated here in points, flows.
  • the wall 3 of the tube 1 is made of PVC.
  • the tube 1 has fine slits 4 through which the sound rays 5 from the PVC tube 1 , as shown by the arrow 12 , can reach the cavities 6 with the cavity thickness 13 lying behind them. Here they are both absorbed and reflected.
  • the partitions 7 are made of a fiber-reinforced, preferably glass-fiber-reinforced plastic (GRP), namely a polyester matrix (polyester composite) with fibers, which also contains about 85% by volume of glass balls 8 .
  • GRP glass-fiber-reinforced plastic
  • the outer end 9 of this, the PVC tube 1 with the slots 4 surrounding the hollow body jacket is made as a layer (jacket) made of glass fiber reinforced plastic (GRP), also a polyester matrix (polyester composite) with glass fibers, in which no balls 8 are contained.
  • This outer end 9 of the cavity body jacket is now surrounded by a lead jacket 10 , which in turn is encased by another jacket made of rubber 11 .
  • polyester instead of polyester, of course, anyone can use it as a composite Suitable plastics occur, such as polyurethane or all thermosetting Plastics containing components. Of course, this applies to everyone Embodiments of the present invention.
  • the PVC pipe 3 carries about 90% reflection, the partition walls 7 made of GRP material with about 85% by volume glass beads with an approx. 75% absorption, the outer end 9 of the hollow body jacket made of GRP with about 10% Absorption and about 10% reflection, the lead jacket 10 with about 95% reflection and the outer jacket made of rubber 11 with about 30% absorption contribute to the overall damping result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP98110063A 1997-06-13 1998-06-03 Silencieux Withdrawn EP0884456A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997125003 DE19725003A1 (de) 1997-06-13 1997-06-13 Schalldämpfer und Schalldämmstoff
DE19725003 1997-06-13

Publications (2)

Publication Number Publication Date
EP0884456A2 true EP0884456A2 (fr) 1998-12-16
EP0884456A3 EP0884456A3 (fr) 1999-06-16

Family

ID=7832372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98110063A Withdrawn EP0884456A3 (fr) 1997-06-13 1998-06-03 Silencieux

Country Status (2)

Country Link
EP (1) EP0884456A3 (fr)
DE (1) DE19725003A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006066540A1 (fr) * 2004-12-23 2006-06-29 Webasto Ag Amortisseur de bruits d'echappement pour un appareil de chauffage de vehicule a moteur
EP1873364A1 (fr) * 2006-06-29 2008-01-02 ABB Turbo Systems AG Silencieux
CN104005492A (zh) * 2014-05-16 2014-08-27 重庆大学 流砂型混合消能减震阻尼装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10102040A1 (de) * 2001-01-18 2002-07-25 Mahle Filtersysteme Gmbh Schalldämpfer
DE10339539A1 (de) * 2003-08-26 2005-03-31 Abb Turbo Systems Ag Schalldämpfer
DE202005007303U1 (de) * 2005-05-07 2006-09-07 Dolmar Gmbh Handgeführtes Arbeitsgerät mit Vakuumschalldämpfer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1982739U (de) * 1967-04-29 1968-04-04 Gewerk Eisenhuette Westfalia Schalldaempfer.
DE2537788C3 (de) * 1975-08-25 1980-04-10 Siemens Ag, 1000 Berlin Und 8000 Muenchen Ultraschallwandler
JPS61191196A (ja) * 1985-02-20 1986-08-25 Toshiba Corp スピ−カボツクス
FR2629864B1 (fr) * 1988-04-12 1991-03-01 Renault Silencieux pour moteur a explosion
FR2660787B1 (fr) * 1990-04-06 1996-06-21 Technologies Speciales Ingenie Ecran anechouide.
DE4228345A1 (de) * 1992-08-26 1993-03-11 Becker Wolf Juergen Univ Prof Ultraschall-wandler
DE19517364C2 (de) * 1995-05-11 2003-10-23 Johannes Ulrich Goertz Vorrichtung und Verfahren zur Füllung von Absorptionsschalldämpfern und ihre Verwendung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006066540A1 (fr) * 2004-12-23 2006-06-29 Webasto Ag Amortisseur de bruits d'echappement pour un appareil de chauffage de vehicule a moteur
EP1873364A1 (fr) * 2006-06-29 2008-01-02 ABB Turbo Systems AG Silencieux
CN104005492A (zh) * 2014-05-16 2014-08-27 重庆大学 流砂型混合消能减震阻尼装置
CN104005492B (zh) * 2014-05-16 2016-06-22 重庆大学 流砂型混合消能减震阻尼装置

Also Published As

Publication number Publication date
EP0884456A3 (fr) 1999-06-16
DE19725003A1 (de) 1998-12-17

Similar Documents

Publication Publication Date Title
DE2814717C3 (de) Schalldämpfende Vorrichtung zur Dämpfung des sich in einem Luftkanal ausbreitenden Geräuschs
DE3117368C2 (fr)
DE3107758C2 (fr)
DE2019416B2 (de) Schalldaempfer fuer stroemende gase
DE1288999B (de) Schalldaempfungseinrichtung fuer mit Schlagkolben arbeitende Bohr-werkzeuge oder Haemmer
DE2221374C2 (de) Pulverkraftbetriebenes Setzgerät
EP1503033B1 (fr) Appareil pour générer un courant d'air dans un dépoussiéreur isolé accoustiquement
DE3527923C2 (fr)
EP0884456A2 (fr) Silencieux
DE19535557A1 (de) Vorrichtung zum Reinigen einer Innenwandung einer Form mittels Trockeneis
DE2916873A1 (de) Vorrichtung zur geraeuschdaempfung an luftauslassoeffnungen
DE2422145A1 (de) Pneumatisch angetriebene, tragbare werkzeugmaschine
DE3544022C2 (fr)
DE69617096T2 (de) Schalldämpfer in Verbindung mit einerm Schraubenkompressor und Verwendung in einer Kokerei
DE10305405A1 (de) Schusshemmendes Verstärkungselement
DE3509946C2 (de) Dralldüsenvorrichtung für eine pneumatisch betriebene Spinnmaschine zur Herstellung von Faserbündelgarn
EP0050337A1 (fr) Dispositif d'amortissement des bruits pour installation à air comprimé
DE4023709A1 (de) Vorrichtung zur absorption von druckpulsationen
DE1185021B (de) Geraeuschdaempfer fuer stroemende Gase mit schallabsorbierenden Waenden
DE202010006419U1 (de) Breitbandig dämpfende Vorrichtung zur Schalldämpfung bei Industrieeinrichtungen, Großanlagen oder Maschinen
DE19600040A1 (de) Schalldämpferelement, insbesondere für einen Kulissenschalldämfper
DE4321662C2 (de) Explosions- und Brandschutz für Kraftstoffbehälter von Fahrzeugen
DE4224487A1 (de) Windkanal
DE202013006953U1 (de) Applikationsdüse für eine Strahlpistole zum Applizieren von Trockeneis
DE19841567C1 (de) Lüftungskanal mit Schalldämpfungselement

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

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 6F 01N 1/24 A, 6F 01N 1/04 B, 6F 01N 7/00 B

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19991219