GB1431662A - Methods of separating acoustic energy from a flowing fluid and exhaust mufflers using same - Google Patents

Methods of separating acoustic energy from a flowing fluid and exhaust mufflers using same

Info

Publication number
GB1431662A
GB1431662A GB1971173A GB1971173A GB1431662A GB 1431662 A GB1431662 A GB 1431662A GB 1971173 A GB1971173 A GB 1971173A GB 1971173 A GB1971173 A GB 1971173A GB 1431662 A GB1431662 A GB 1431662A
Authority
GB
United Kingdom
Prior art keywords
duct
acoustic energy
diaphragms
chamber
holes
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
Application number
GB1971173A
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.)
Donaldson Co Inc
Original Assignee
Donaldson Co Inc
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 Donaldson Co Inc filed Critical Donaldson Co Inc
Publication of GB1431662A publication Critical patent/GB1431662A/en
Expired 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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers

Abstract

1431662 Silencing gaseous flow DONALDSON CO Inc 25 April 1973 [28 April 1972] 19711/73 Heading F1B [Also in Divisions H3-5] Acoustic energy of a predetermined wavelength in a fluid-flow in a duct 17 is coupled into a chamber 19 through holes 20 or diaphragms, in the separating wall, of a size and spacing such that the phase of a wave is shifted , the wave travels in the same direction in the chamber and substantially no acoustic energy of the wave returns the holes or diaphragms during coupling. The centres of the holes or diaphragms are spaced apart along the duct by, an odd multiple of one-quarter of the predetermined wavelength. The chamber 19 may contain acoustic energy absorbing material 21, e.g. fibreglass. Several chambers 19 may be coupled to the duct 17 along its length, each for a particular wavelength. The chamber 19 may be formed by a duct connected to the duct 17 for fluid-flow from the downstream end of one to the upstream end of the other, Fig. 4 (not shown), or as a duct open at one end but closed at the other, Fig. 5 (not shown), to provide partial or complete acoustic reflection. The sizes of the holes 20 or diaphragms may be calculated or determined experimentally, one example being given in the Specification. The coupling arrangements may be used for silencing internal combustion engine intake or exhaust systems and be combination with other types of silencing.
GB1971173A 1972-04-28 1973-04-25 Methods of separating acoustic energy from a flowing fluid and exhaust mufflers using same Expired GB1431662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24867672A 1972-04-28 1972-04-28

Publications (1)

Publication Number Publication Date
GB1431662A true GB1431662A (en) 1976-04-14

Family

ID=22940179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1971173A Expired GB1431662A (en) 1972-04-28 1973-04-25 Methods of separating acoustic energy from a flowing fluid and exhaust mufflers using same

Country Status (9)

Country Link
US (1) US3776364A (en)
JP (1) JPS4941738A (en)
AU (1) AU472372B2 (en)
CA (1) CA981130A (en)
DE (1) DE2321649C2 (en)
FR (1) FR2182463A5 (en)
GB (1) GB1431662A (en)
IT (1) IT998103B (en)
SU (1) SU576972A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122256A (en) * 1982-05-14 1984-01-11 Bahco Ventilation Ab Silencing in ventilation ducts

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946558A (en) * 1973-08-06 1976-03-30 Beekhuis Jr William H Exhaust system and method
JPS5095632A (en) * 1973-12-25 1975-07-30
JPS526808U (en) * 1975-07-02 1977-01-18
JPS55130581A (en) * 1979-03-30 1980-10-09 Sharp Kk Display system
JPS57139624U (en) * 1981-02-27 1982-09-01
JPS6146169Y2 (en) * 1981-02-27 1986-12-25
FR2543342B1 (en) * 1983-03-21 1986-10-17 Centre Techn Ind Mecanique ANECHICAL NOISE ATTENUATING DEVICE FOR LIQUID PIPES AND METHOD AND CIRCUIT USING THE SAME TO MEASURE THE ENERGY EMITTED BY HYDRAULIC EQUIPMENT
IT206464Z2 (en) * 1986-02-27 1987-08-10 Alfa Romeo Spa EXHAUST SYSTEM FOR A C.I. ENGINE
US5123501A (en) * 1988-10-21 1992-06-23 Donaldson Company, Inc. In-line constricted sound-attenuating system
SE510530C2 (en) * 1993-03-05 1999-05-31 Volvo Ab Device for sound attenuation in a duct system
DE19612572A1 (en) * 1996-03-29 1997-10-02 Fraunhofer Ges Forschung Cleanable silencer for low frequencies
AU2599599A (en) 1998-02-13 1999-08-30 Donaldson Company Inc. Mufflers for use with engine retarders; and methods
US6082487A (en) * 1998-02-13 2000-07-04 Donaldson Company, Inc. Mufflers for use with engine retarders; and methods
US6148519A (en) * 1998-09-18 2000-11-21 Donaldson Company, Inc. Apparatus for installing a packing material in a muffler assembly; and methods thereof
US6332511B1 (en) 1999-12-07 2001-12-25 Burgess-Manning, Inc. Silencer assembly having single strand fiberglass acoustic pack material
US7174707B2 (en) * 2000-06-09 2007-02-13 Volvo Lastvagnar Ab Regeneration of a filter by the use of a tone generator
DE102004006647B4 (en) * 2003-02-14 2015-02-26 IfTA Ingenieurbüro für Thermoakustik GmbH Method and device for discharging exhaust gas
US20090007912A1 (en) * 2004-04-05 2009-01-08 Breas Medical Ab Ventilator for Supplying Breathable Gas to a Patient, and a Noise Reduction Method for Said Ventilator
FR2878894B1 (en) * 2004-12-08 2010-12-17 Faurecia Sys Echappement EXHAUST VOLUME
DE102006008941A1 (en) * 2006-02-23 2007-08-30 J. Eberspächer GmbH & Co. KG Silencer for an exhaust system
DE102006024839A1 (en) * 2006-05-24 2007-11-29 Seleon Gmbh Feed unit and conveying process
US20100051379A1 (en) * 2008-09-02 2010-03-04 Charles Graves Enhanced Exhaust System
DE102011009966B4 (en) * 2011-02-01 2021-05-20 IfTA Ingenieurbüro für Thermoakustik GmbH Combustion system with cultivation
US8393437B2 (en) * 2011-02-15 2013-03-12 Westinghouse Electric Company Llc Noise and vibration mitigation system for nuclear reactors employing an acoustic side branch resonator
CN103696828A (en) * 2014-01-04 2014-04-02 诸城市海得威机械有限公司 High-frequency noise eliminating silencer for engineering vehicle
GB2528950A (en) * 2014-08-06 2016-02-10 Aaf Ltd Sound suppression apparatus
US9618151B2 (en) 2015-02-26 2017-04-11 Adriaan DeVilliers Compact modular low resistance broadband acoustic silencer
DE102015214709A1 (en) * 2015-07-31 2017-02-02 Mahle International Gmbh Flow channel and ventilation, heating or air conditioning
CN109899132A (en) * 2017-12-11 2019-06-18 郑州宇通客车股份有限公司 Exhaust pipe preprocessor and vehicle

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1054690A (en) * 1900-01-01
US1638309A (en) * 1922-04-13 1927-08-09 Thomas S Kemble Muffler construction
US1949667A (en) * 1932-05-07 1934-03-06 Transiskus Theodore Exhaust silencer
US2297046A (en) * 1939-08-25 1942-09-29 Maxim Silencer Co Means for preventing shock excitation of acoustic conduits or chambers
GB602859A (en) * 1946-04-24 1948-06-03 Cecil Gordon Vokes Improvements in silencers
US2871452A (en) * 1953-04-23 1959-01-27 Hewlett Packard Co Broad band waveguide directional coupler
US2820203A (en) * 1954-03-18 1958-01-14 Sperry Rand Corp Directional couplers
GB789784A (en) * 1955-04-18 1958-01-29 Applic Ind Commerciales Et Imm Improvements in and relating to exhaust silencers
US3113635A (en) * 1959-03-31 1963-12-10 Bolt Beranek & Newman Apparatus for silencing vibrational energy
US3212603A (en) * 1963-10-24 1965-10-19 Walker Mfg Co Muffler with tuned silencing chambers
US3263772A (en) * 1964-06-17 1966-08-02 Arvin Ind Inc Sound attenuating gas conduit with one-quarter wave-length side branch chambers
US3289786A (en) * 1965-05-17 1966-12-06 Walker Mfg Co Muffler with return bend tuning passage
US3289785A (en) * 1965-10-04 1966-12-06 Walker Mfg Co Silencer with outer housing contacting inner conduit to define resonance chambers
US3382948A (en) * 1965-10-13 1968-05-14 Walker Mfg Co Mufflers with side branch tuning chambers
GB1180218A (en) * 1966-08-02 1970-02-04 Marconi Co Ltd Improvements in or relating to Dispersive Devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122256A (en) * 1982-05-14 1984-01-11 Bahco Ventilation Ab Silencing in ventilation ducts

Also Published As

Publication number Publication date
SU576972A3 (en) 1977-10-15
AU5459773A (en) 1974-10-17
FR2182463A5 (en) 1973-12-07
DE2321649A1 (en) 1973-11-15
JPS4941738A (en) 1974-04-19
CA981130A (en) 1976-01-06
AU472372B2 (en) 1976-05-20
US3776364A (en) 1973-12-04
IT998103B (en) 1976-01-20
DE2321649C2 (en) 1981-09-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee