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WO1999035378A1 - Silencieux - Google Patents

Silencieux Download PDF

Info

Publication number
WO1999035378A1
WO1999035378A1 PCT/DK1998/000588 DK9800588W WO9935378A1 WO 1999035378 A1 WO1999035378 A1 WO 1999035378A1 DK 9800588 W DK9800588 W DK 9800588W WO 9935378 A1 WO9935378 A1 WO 9935378A1
Authority
WO
WIPO (PCT)
Prior art keywords
silencing
diffuser
silencing elements
elements
downstream
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.)
Ceased
Application number
PCT/DK1998/000588
Other languages
English (en)
Inventor
Svend Frederiksen
D. W. Bingham
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.)
Silentor Notox AS
Original Assignee
Silentor Notox AS
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 Silentor Notox AS filed Critical Silentor Notox AS
Priority to EP98963397A priority Critical patent/EP1060328B1/fr
Priority to AT98963397T priority patent/ATE224003T1/de
Priority to DE69807942T priority patent/DE69807942T2/de
Priority to AU18696/99A priority patent/AU1869699A/en
Publication of WO1999035378A1 publication Critical patent/WO1999035378A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing 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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • 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
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
    • 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
    • F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
    • F01N2470/30—Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction

Definitions

  • silencers to be installed immediately upstream of heat recovery boilers, catalysers, filters, or other apparatuses in a piping system. Such apparatuses add to the horizontal space requirement of the system. At the same time, they are usually designed with rather large transverse dimensions. In such cases, short and wide silencers are called for. In addition, many boilers and other air- or gas-treatment equipment, etc., require an even flow distribution across their inlet in order to function effectively.
  • each subflow throughflow s its own silencing element.
  • a whole series of silencer apparatuses of different sizes can be derived from, e.g., modulized silencing elements manufactured in a limited number of standardised sizes.
  • the assembly of silencing elements can be designed in such a way that the various elements support each other mechanically.
  • moderate plate thickness and moderately advanced materials can be selected. All these factors will tend to reduce manufacturing costs.
  • Plenum chamber 4 is contained within an end cap 19 and a casing 20, which is made up of four curved parts, for the purpose of minimising shell noise transmitted through the casing.
  • curved parts 21 have been fitted onto the plane outer sides of silencer elements 6a, b, c, d, f , g, h, and i.
  • thermal insulation (not shown) will be fitted onto the entire casing of the apparatus.
  • each silencer element 6a ... f has been made as a separate unit with its own casing 13.
  • a downstream apparatus (boiler etc.), 12 is placed downstream of the silencing element assembly, which contributes to an even inflow distribution to apparatus 12, here via plenum chamber 5.
  • two cavities, 22 and 23 exist in the centre, between silencing elements, and outside the elements. Both cavities are closed at the left end by division wall 24, so that there is no flow within the cavities, and so that cavities are acoustically isolated at the left end. At the other end the cavities communicate acoustically with plenum chamber 5, via a perforated plate 25.
  • This increased flow-dynamic efficiency can be utilised either for gaining gas turbine shaft work or for selecting rather narrow total flow area within pipes of silencer elements, retaining a pressure drop across the unit which is equal to the pressure drop 25 across a conventional silencer. In this way, especially low-frequent sound attenuation can be enhanced.
  • fig. 7 shows the inlet part of a fourth embodiment according to the invention, being a variation of the third embodiment.
  • a chamber 4 has been fitted onto 30 inlet diffuser 1 5, to communicate acoustically with the pipe /duct system prior to gas entering silencing elements 6a ... .
  • This communication is achieved by providing guide plate 27 with apertures 28.
  • Chamber 4, which is not throughflowed, is filled with sound absorptive material, Abs.
  • space outside diffuser 15 is utilised for sound attenuation, both high- and low-frequent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Pipe Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

L'invention se rapporte à un dispositif d'atténuation du bruit qui est traversé par un gaz et qui est disposé à l'intérieur d'une conduite ou d'un tuyau, le flux de gaz traversant l'appareil étant, au niveau d'un ou de plusieurs étages, divisé en au moins trois flux secondaires sensiblement parallèles, chacun de ces flux secondaires traversant un élément d'atténuation du bruit (6a...) amenant une atténuation du bruit par réflexion assurée par des changements d'aire de section transversale. Lesdits éléments d'atténuation du bruit sont disposés les uns à côté des autres au sein d'une enveloppe externe, 80 % au moins du volume d'air à l'intérieur de ladite enveloppe étant constitué d'air, de gaz et/ou de matières solides, et au moins une partie principale dudit volume remplissant des fonctions d'atténuation du bruit. Les flux secondaires fusionnent en aval desdits éléments d'atténuation du bruit, soit au sein même de l'appareil soit plus en aval dans la conduite ou le tuyau.
PCT/DK1998/000588 1997-12-30 1998-12-30 Silencieux Ceased WO1999035378A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98963397A EP1060328B1 (fr) 1997-12-30 1998-12-30 Silencieux
AT98963397T ATE224003T1 (de) 1997-12-30 1998-12-30 Schalldämpfer
DE69807942T DE69807942T2 (de) 1997-12-30 1998-12-30 Schalldämpfer
AU18696/99A AU1869699A (en) 1997-12-30 1998-12-30 A silencer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK155997 1997-12-30
DK1559/97 1997-12-30

Publications (1)

Publication Number Publication Date
WO1999035378A1 true WO1999035378A1 (fr) 1999-07-15

Family

ID=8106064

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1998/000588 Ceased WO1999035378A1 (fr) 1997-12-30 1998-12-30 Silencieux

Country Status (5)

Country Link
EP (1) EP1060328B1 (fr)
AT (1) ATE224003T1 (fr)
AU (1) AU1869699A (fr)
DE (1) DE69807942T2 (fr)
WO (1) WO1999035378A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001042631A1 (fr) * 1999-12-09 2001-06-14 Abb Ab Systeme d'echappement
EP1184543A3 (fr) * 2000-08-30 2004-01-07 J. Eberspächer GmbH & Co. KG Système de purification de gaz d'échappement pour véhicules à moteurs, en particulier véhicules utilitaires Diesel
WO2004079169A1 (fr) * 2003-03-05 2004-09-16 Chris-Invest A/S Silencieux pour systemes d'echappement de moteurs a combustion et procede d'entretien du systeme d'echappement
NL1026879C2 (nl) * 2004-08-19 2006-02-21 Aarding Thermal Acoustics B V Geluiddemper, profieldeel en werkwijze voor het vervaardigen van een paneel.
WO2008065361A1 (fr) * 2006-12-01 2008-06-05 Robert Bosch Gmbh Baffle acoustique thermique
WO2010109219A1 (fr) * 2009-03-23 2010-09-30 Vortex Performance Exhausts Limited Filtre d'échappement amélioré
GB2487320A (en) * 2009-03-23 2012-07-18 Vortex Performance Exhausts Ltd Exhaust filter with accelerator tubes
CN104952440A (zh) * 2015-06-30 2015-09-30 成都普创通信技术股份有限公司 阵列式消声器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075316A (en) * 1933-11-21 1937-03-30 Carl Theodor Setterberg Silencer for internal combustion engines
US4105089A (en) * 1975-11-24 1978-08-08 Judd Frederick V H Flow distributor for gas turbine silencers
US4392549A (en) * 1981-03-10 1983-07-12 Instytut Chemii Nieorganicznej Boiler noise suppressor
EP0131350A2 (fr) * 1983-03-17 1985-01-16 Chillcotts Limited Silencieux d'échappement
WO1996032572A1 (fr) * 1995-04-11 1996-10-17 Vølund Danstoker A/S Echangeur de chaleur combine a un dispositif amortisseur de bruit
US5578277A (en) * 1994-06-24 1996-11-26 Caterpillar Inc. Modular catalytic converter and muffler for internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075316A (en) * 1933-11-21 1937-03-30 Carl Theodor Setterberg Silencer for internal combustion engines
US4105089A (en) * 1975-11-24 1978-08-08 Judd Frederick V H Flow distributor for gas turbine silencers
US4392549A (en) * 1981-03-10 1983-07-12 Instytut Chemii Nieorganicznej Boiler noise suppressor
EP0131350A2 (fr) * 1983-03-17 1985-01-16 Chillcotts Limited Silencieux d'échappement
US5578277A (en) * 1994-06-24 1996-11-26 Caterpillar Inc. Modular catalytic converter and muffler for internal combustion engine
WO1996032572A1 (fr) * 1995-04-11 1996-10-17 Vølund Danstoker A/S Echangeur de chaleur combine a un dispositif amortisseur de bruit

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001042631A1 (fr) * 1999-12-09 2001-06-14 Abb Ab Systeme d'echappement
EP1184543A3 (fr) * 2000-08-30 2004-01-07 J. Eberspächer GmbH & Co. KG Système de purification de gaz d'échappement pour véhicules à moteurs, en particulier véhicules utilitaires Diesel
WO2004079169A1 (fr) * 2003-03-05 2004-09-16 Chris-Invest A/S Silencieux pour systemes d'echappement de moteurs a combustion et procede d'entretien du systeme d'echappement
NL1026879C2 (nl) * 2004-08-19 2006-02-21 Aarding Thermal Acoustics B V Geluiddemper, profieldeel en werkwijze voor het vervaardigen van een paneel.
EP1628004A1 (fr) * 2004-08-19 2006-02-22 Aarding Thermal Acoustics B.V. Silencieux, élément de profil et procédé de fabrication d'une interpale
WO2008065361A1 (fr) * 2006-12-01 2008-06-05 Robert Bosch Gmbh Baffle acoustique thermique
WO2010109219A1 (fr) * 2009-03-23 2010-09-30 Vortex Performance Exhausts Limited Filtre d'échappement amélioré
GB2487320A (en) * 2009-03-23 2012-07-18 Vortex Performance Exhausts Ltd Exhaust filter with accelerator tubes
GB2487320B (en) * 2009-03-23 2013-09-25 Vortex Performance Exhausts Ltd An improved exhaust filter
US8627921B2 (en) 2009-03-23 2014-01-14 Barry Mead Exhaust filter
CN104952440A (zh) * 2015-06-30 2015-09-30 成都普创通信技术股份有限公司 阵列式消声器
CN104952440B (zh) * 2015-06-30 2019-01-11 成都普创通信技术股份有限公司 阵列式消声器

Also Published As

Publication number Publication date
EP1060328A1 (fr) 2000-12-20
AU1869699A (en) 1999-07-26
ATE224003T1 (de) 2002-09-15
EP1060328B1 (fr) 2002-09-11
DE69807942D1 (de) 2002-10-17
DE69807942T2 (de) 2003-04-30

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