WO1999035378A1 - A silencer - Google Patents
A silencer Download PDFInfo
- 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
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 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.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98963397A EP1060328B1 (en) | 1997-12-30 | 1998-12-30 | A silencer |
AT98963397T ATE224003T1 (en) | 1997-12-30 | 1998-12-30 | SILENCER |
DE69807942T DE69807942T2 (en) | 1997-12-30 | 1998-12-30 | MUFFLER |
AU18696/99A AU1869699A (en) | 1997-12-30 | 1998-12-30 | A silencer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK1559/97 | 1997-12-30 | ||
DK155997 | 1997-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999035378A1 true WO1999035378A1 (en) | 1999-07-15 |
Family
ID=8106064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK1998/000588 WO1999035378A1 (en) | 1997-12-30 | 1998-12-30 | A silencer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1060328B1 (en) |
AT (1) | ATE224003T1 (en) |
AU (1) | AU1869699A (en) |
DE (1) | DE69807942T2 (en) |
WO (1) | WO1999035378A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001042631A1 (en) * | 1999-12-09 | 2001-06-14 | Abb Ab | Exhaust system |
EP1184543A2 (en) * | 2000-08-30 | 2002-03-06 | J. Eberspächer GmbH & Co. | Exhaust purification system for motor vehicles, particularly Diesel utility vehicles |
WO2004079169A1 (en) * | 2003-03-05 | 2004-09-16 | Chris-Invest A/S | A silencer for combustion engine exhaust systems and a method of servicing the exhaust system |
NL1026879C2 (en) * | 2004-08-19 | 2006-02-21 | Aarding Thermal Acoustics B V | Silencer, profile part and method for manufacturing a panel. |
WO2008065361A1 (en) * | 2006-12-01 | 2008-06-05 | Robert Bosch Gmbh | Thermal acoustic baffle |
WO2010109219A1 (en) * | 2009-03-23 | 2010-09-30 | Vortex Performance Exhausts Limited | An improved exhaust filter |
GB2487320A (en) * | 2009-03-23 | 2012-07-18 | Vortex Performance Exhausts Ltd | Exhaust filter with accelerator tubes |
CN104952440A (en) * | 2015-06-30 | 2015-09-30 | 成都普创通信技术股份有限公司 | Array muffler |
Citations (6)
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 (en) * | 1983-03-17 | 1985-01-16 | Chillcotts Limited | Exhaust silencer |
WO1996032572A1 (en) * | 1995-04-11 | 1996-10-17 | Vølund Danstoker A/S | A combined heat exchanger and silencer apparatus |
US5578277A (en) * | 1994-06-24 | 1996-11-26 | Caterpillar Inc. | Modular catalytic converter and muffler for internal combustion engine |
-
1998
- 1998-12-30 DE DE69807942T patent/DE69807942T2/en not_active Expired - Lifetime
- 1998-12-30 AT AT98963397T patent/ATE224003T1/en not_active IP Right Cessation
- 1998-12-30 AU AU18696/99A patent/AU1869699A/en not_active Abandoned
- 1998-12-30 WO PCT/DK1998/000588 patent/WO1999035378A1/en active IP Right Grant
- 1998-12-30 EP EP98963397A patent/EP1060328B1/en not_active Expired - Lifetime
Patent Citations (6)
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 (en) * | 1983-03-17 | 1985-01-16 | Chillcotts Limited | Exhaust silencer |
US5578277A (en) * | 1994-06-24 | 1996-11-26 | Caterpillar Inc. | Modular catalytic converter and muffler for internal combustion engine |
WO1996032572A1 (en) * | 1995-04-11 | 1996-10-17 | Vølund Danstoker A/S | A combined heat exchanger and silencer apparatus |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001042631A1 (en) * | 1999-12-09 | 2001-06-14 | Abb Ab | Exhaust system |
EP1184543A2 (en) * | 2000-08-30 | 2002-03-06 | J. Eberspächer GmbH & Co. | Exhaust purification system for motor vehicles, particularly Diesel utility vehicles |
EP1184543A3 (en) * | 2000-08-30 | 2004-01-07 | J. Eberspächer GmbH & Co. KG | Exhaust purification system for motor vehicles, particularly Diesel utility vehicles |
WO2004079169A1 (en) * | 2003-03-05 | 2004-09-16 | Chris-Invest A/S | A silencer for combustion engine exhaust systems and a method of servicing the exhaust system |
NL1026879C2 (en) * | 2004-08-19 | 2006-02-21 | Aarding Thermal Acoustics B V | Silencer, profile part and method for manufacturing a panel. |
EP1628004A1 (en) * | 2004-08-19 | 2006-02-22 | Aarding Thermal Acoustics B.V. | Sound damper, sectional component and method for the production of a splitter |
WO2008065361A1 (en) * | 2006-12-01 | 2008-06-05 | Robert Bosch Gmbh | Thermal acoustic baffle |
WO2010109219A1 (en) * | 2009-03-23 | 2010-09-30 | Vortex Performance Exhausts Limited | An improved exhaust filter |
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 (en) * | 2015-06-30 | 2015-09-30 | 成都普创通信技术股份有限公司 | Array muffler |
CN104952440B (en) * | 2015-06-30 | 2019-01-11 | 成都普创通信技术股份有限公司 | Array type silencer |
Also Published As
Publication number | Publication date |
---|---|
AU1869699A (en) | 1999-07-26 |
EP1060328A1 (en) | 2000-12-20 |
ATE224003T1 (en) | 2002-09-15 |
DE69807942D1 (en) | 2002-10-17 |
DE69807942T2 (en) | 2003-04-30 |
EP1060328B1 (en) | 2002-09-11 |
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