EP0243559A1 - Schalldämpfer für Gasstrom - Google Patents

Schalldämpfer für Gasstrom Download PDF

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Publication number
EP0243559A1
EP0243559A1 EP86401886A EP86401886A EP0243559A1 EP 0243559 A1 EP0243559 A1 EP 0243559A1 EP 86401886 A EP86401886 A EP 86401886A EP 86401886 A EP86401886 A EP 86401886A EP 0243559 A1 EP0243559 A1 EP 0243559A1
Authority
EP
European Patent Office
Prior art keywords
ferrule
envelope
gas
chamber
muffler according
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.)
Granted
Application number
EP86401886A
Other languages
English (en)
French (fr)
Other versions
EP0243559B1 (de
Inventor
Jean-Paul Boet
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.)
Sa Andre Boet SA
Original Assignee
Sa Andre Boet SA
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 Sa Andre Boet SA filed Critical Sa Andre Boet SA
Priority to AT86401886T priority Critical patent/ATE54721T1/de
Publication of EP0243559A1 publication Critical patent/EP0243559A1/de
Application granted granted Critical
Publication of EP0243559B1 publication Critical patent/EP0243559B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • 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
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled

Definitions

  • the present invention relates to silencers for gas streams comprising means for attenuating the noises caused by the expansion of the gases.
  • the latter consists mainly of a manifold connected to the engine and a silencer connected on the one hand, to this manifold and on the other hand, to an exhaust manifold.
  • the muffler and especially the silencer prevent gases from being released into the atmosphere with such physical criteria.
  • the muffler is the predominant element in which the gases relax and cool during their journey inside while maintaining an acceptable external noise level, despite the relaxation of these gases.
  • the known silencers consist of an elongated casing provided with an inlet orifice and a gas outlet orifice, which are respectively provided at its ends and to which are connected on the one hand, the manifold and on the other hand, the exhaust manifold.
  • One or more tubes, most often pierced with radial orifices, are arranged in the envelope and can also be surrounded by a fibrous coating thus lowering the noise level.
  • the exhaust gas path is, despite everything, appreciably direct between the two ends of the envelope, which affects the noise attenuation efficiency since it is transferred directly from the inlet to the outlet of the silencer.
  • the use of such silencers reduces the power of the engine.
  • the present invention aims to overcome the above-mentioned drawbacks and relates to a silencer for gas stream, for example from a heat engine, turbine, compressor, etc ..., which optimizes the expansion of gases by optimizing its transfer function.
  • a silencer for gas stream for example from a heat engine, turbine, compressor, etc ..., which optimizes the expansion of gases by optimizing its transfer function.
  • the practical realization of such a silencer is mechanically very simple and inexpensive.
  • the silencer for gas stream comprising an elongated casing provided with an inlet orifice and a gas outlet orifice respectively provided at its ends and gas expansion means arranged at the interior of said envelope is remarkable in that said expansion means consist on the one hand, by a ferrule comprising a transverse partition dividing it into two chambers, one facing the gas inlet orifice and the other facing the gas outlet orifice, said ferrule providing a passage with the internal wall of said envelope and extending over most of the length of said envelope and on the other hand, at least on the side of the gas outlet, by a tube integral with said orifice and extending into said chamber opposite said ferrule.
  • the expansion means of the invention avoid the direct transfer of gases from the inlet to the outlet of the muffler and make it possible to greatly reduce the noise.
  • the envelope, the ferrule and the tubing are of the shape of revolution and are coaxial with one another.
  • the transverse partition separating the ferrule into two adjacent chambers, is arranged in a plane perpendicular to the axis of said ferrule.
  • the two rooms can have an identical volume.
  • the ferrule comprises, at least in the first chamber facing the gas inlet orifice, a plurality of radial perforations.
  • a fibrous coating can be arranged at least in the chamber of said shell facing the gas inlet orifice.
  • the ends of said ferrule may also have a conical or similar shape.
  • the axis of the ferrule can be offset from the axis of the envelope.
  • a heat engine 1 of the internal combustion type to which is connected an exhaust 2 consisting mainly of a manifold 3 connected to the exhaust ports of the engine, a silencer 4 and an exhaust manifold 5.
  • the passage of the gas stream from the engine 1 takes place through the various elements mentioned in the exhaust pipe 2.
  • the silencer 4 for the gas stream comprises a casing 7, of substantially elongated shape, provided with a gas inlet orifice 8 at one end 9 of the casing and a gas outlet orifice 10 at the other end 11 of the envelope.
  • the gas inlet port 8 receives one end 12 of the manifold manifold 3 and the gas outlet port 10 receives one end 15 of the exhaust manifold 5.
  • the gas stream flowing in the silencer 4 is shown symbolically by arrows 16.
  • these expansion means consist on the one hand, by a ferrule 18 held against the internal wall 19 of the casing 7 by means of fixing lugs 20 and on the other hand, by the end 15 of the exhaust manifold 5.
  • the ferrule 18 comprises a transverse partition 23 which divides the interior volume of this ferrule into two adjacent chambers 24 and 25.
  • the chamber 24 is a view of the gas inlet orifice 8 while the chamber 25 is opposite the gas outlet orifice 10.
  • a communication passage 27 is formed between the outer wall 28 of the shell 18 and the inner wall 19 of the casing 7 thus allowing the transfer and evacuation of the gases from the chamber 24 receiving the gases from the manifold, at the chamber 25 in communication with the gas outlet pipe.
  • the length L of the ferrule 18 extends over most of the length L1 of the casing 7.
  • the ferrule 18 and the casing 7 are of the shape of revolution and are coaxial around an axis 30. Similarly, the end 12 of the manifold and the end 15 of the tubing exhaust 5 are coaxial with this axis 30.
  • the ferrule 18 also comprises in the first chamber 24, radial perforations 31 which have the purpose of reducing natural frequencies due to the coupling of the two adjacent chambers.
  • the expansion means according to the invention also consist of the end 15 of the exhaust pipe 5 arranged projecting into the chamber 25 of the shell so that the face 34 of said end 15 faces the partition 23
  • the arrangement of the end 15 in the chamber 25 then has an additional impedance against the gases before their ejection into the atmosphere.
  • a small part of the gases also passes through the radial perforations 31 formed in the first chamber 24 of the shell.
  • the gases 16 then propagate towards the partition 23, then orient themselves towards the exhaust pipe 5, where they rush in until they are ejected into the atmosphere.
  • the acoustic level reached by the gases being further lowered by virtue of the end 15 protruding in the second chamber 25 since the end 15 increases the gas output impedance.
  • the noise level obtained at the outlet of the exhaust manifold then gives particularly satisfactory results.
  • the silencer of the invention based on the acoustic coupling between two chambers defined by the shell, makes it possible to obtain a significant acoustic attenuation of the noise.
  • this silencer can be summarized by the fact that its transfer function is that of a low-pass filter with two degrees of freedom, that is to say that all frequencies above its cutoff frequency are greatly attenuated and the frequencies below it are weakly attenuated.
  • FIG. 3 illustrates an alternative embodiment for which the ends 35 and 36 of the shell 18 have been modified. They come in a conical shape.
  • FIG. 4 illustrates another alternative embodiment for which the chamber 24 facing the orifice 8 of the gas inlet is covered with a fibrous coating 40 such as a mattress of mineral wool.
  • a fibrous coating 40 such as a mattress of mineral wool.
  • FIG. 5 illustrates an alternative embodiment, which consists in off-centering the shell 18 of the envelope 7.
  • the shell is integral with the envelope by means, for example, of a weld.
  • the new geometric axis 45 of the shell 18 is offset with respect to the axis 30 of the envelope.
  • Another variant shown in dotted lines in FIG. 3, consists in arranging the end 12 of the manifold of the manifold 3 projecting into the chamber 24, at a distance much more distant from the partition 23 than the distance separating the end 15 of the tubing 5 opposite the partition 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Compressor (AREA)
EP86401886A 1986-04-30 1986-08-27 Schalldämpfer für Gasstrom Expired - Lifetime EP0243559B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401886T ATE54721T1 (de) 1986-04-30 1986-08-27 Schalldaempfer fuer gasstrom.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8606304A FR2598176B1 (fr) 1986-04-30 1986-04-30 Silencieux pour courant gazeux
FR8606304 1986-04-30

Publications (2)

Publication Number Publication Date
EP0243559A1 true EP0243559A1 (de) 1987-11-04
EP0243559B1 EP0243559B1 (de) 1990-07-18

Family

ID=9334808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401886A Expired - Lifetime EP0243559B1 (de) 1986-04-30 1986-08-27 Schalldämpfer für Gasstrom

Country Status (5)

Country Link
EP (1) EP0243559B1 (de)
AT (1) ATE54721T1 (de)
DE (1) DE3672829D1 (de)
ES (1) ES2002833A6 (de)
FR (1) FR2598176B1 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355605A1 (de) * 1988-08-16 1990-02-28 JAWA, národni podnik Schalldämpfer für Auspuffanlagen
EP0359948A2 (de) * 1988-09-21 1990-03-28 WABCO Vermögensverwaltungs-GmbH Geräuschdämpfer
FR2713701A1 (fr) * 1993-12-14 1995-06-16 Boet Sa Andre Silencieux pour courant gazeux.
FR2713702A1 (fr) * 1993-12-14 1995-06-16 Boet Sa Andre Silencieux pour courant gazeux.
EP1442905A2 (de) * 2003-01-31 2004-08-04 J. Eberspächer GmbH & Co. KG Schalldämpfer für ein Heizgerät, insbesondere Fahrzeugheizgerät
GB2479787A (en) * 2010-04-23 2011-10-26 Exhausts Uk Ltd Exhaust silencer with acoustic reducer cup
EP2362076A3 (de) * 2010-02-18 2012-05-16 J. Eberspächer GmbH & Co. KG Schalldämpfer
EP3388678A1 (de) * 2017-04-10 2018-10-17 Gardner Denver Deutschland GmbH Pulsations-schalldämpfer für kompressoren
CN108926266A (zh) * 2017-05-27 2018-12-04 广东美的生活电器制造有限公司 消音盖、杯盖组件和食物料理机
US10816001B2 (en) 2017-04-10 2020-10-27 Gardner Denver Deutschland Gmbh Compressor system with internal air-water cooling
US11193489B2 (en) 2017-04-10 2021-12-07 Gardner Denver Deutschland Gmbh Method for controlling a rotary screw compressor
CN113994076A (zh) * 2019-06-19 2022-01-28 天纳克汽车经营有限公司 排气系统和消音器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE513629A (de) *
DE918062C (de) * 1948-12-31 1954-09-16 Leistritz Maschfabrik Paul Schalldaempfer mit aufeinanderfolgenden Kammern
FR1226438A (fr) * 1958-10-09 1960-07-11 Silencieux pour l'écoulement des fluides
US3651888A (en) * 1970-07-24 1972-03-28 Tenneco Inc Multi-pass muffler
US4220219A (en) * 1978-09-14 1980-09-02 Flugger Ray T Lightweight muffler and method for muffling noise

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE513629A (de) *
DE918062C (de) * 1948-12-31 1954-09-16 Leistritz Maschfabrik Paul Schalldaempfer mit aufeinanderfolgenden Kammern
FR1226438A (fr) * 1958-10-09 1960-07-11 Silencieux pour l'écoulement des fluides
US3651888A (en) * 1970-07-24 1972-03-28 Tenneco Inc Multi-pass muffler
US4220219A (en) * 1978-09-14 1980-09-02 Flugger Ray T Lightweight muffler and method for muffling noise

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355605A1 (de) * 1988-08-16 1990-02-28 JAWA, národni podnik Schalldämpfer für Auspuffanlagen
EP0359948A2 (de) * 1988-09-21 1990-03-28 WABCO Vermögensverwaltungs-GmbH Geräuschdämpfer
EP0359948A3 (de) * 1988-09-21 1992-02-12 WABCO Vermögensverwaltungs-GmbH Geräuschdämpfer
FR2713701A1 (fr) * 1993-12-14 1995-06-16 Boet Sa Andre Silencieux pour courant gazeux.
FR2713702A1 (fr) * 1993-12-14 1995-06-16 Boet Sa Andre Silencieux pour courant gazeux.
EP1442905A2 (de) * 2003-01-31 2004-08-04 J. Eberspächer GmbH & Co. KG Schalldämpfer für ein Heizgerät, insbesondere Fahrzeugheizgerät
EP1442905A3 (de) * 2003-01-31 2007-06-20 J. Eberspächer GmbH & Co. KG Schalldämpfer für ein Heizgerät, insbesondere Fahrzeugheizgerät
EP2362076A3 (de) * 2010-02-18 2012-05-16 J. Eberspächer GmbH & Co. KG Schalldämpfer
US8302732B2 (en) 2010-02-18 2012-11-06 J. Eberspaecher Gmbh & Co. Kg Silencer
GB2479787A (en) * 2010-04-23 2011-10-26 Exhausts Uk Ltd Exhaust silencer with acoustic reducer cup
EP3388678A1 (de) * 2017-04-10 2018-10-17 Gardner Denver Deutschland GmbH Pulsations-schalldämpfer für kompressoren
US10816001B2 (en) 2017-04-10 2020-10-27 Gardner Denver Deutschland Gmbh Compressor system with internal air-water cooling
US11067084B2 (en) 2017-04-10 2021-07-20 Gardner Denver Deutschland Gmbh Pulsation mufflers for compressors
US11193489B2 (en) 2017-04-10 2021-12-07 Gardner Denver Deutschland Gmbh Method for controlling a rotary screw compressor
US11686310B2 (en) 2017-04-10 2023-06-27 Gardner Denver Deutschland Gmbh Method for controlling a rotary screw compressor
US12092110B2 (en) 2017-04-10 2024-09-17 Gardner Denver Deutschland Gmbh Method for controlling a rotary screw compressor
CN108926266A (zh) * 2017-05-27 2018-12-04 广东美的生活电器制造有限公司 消音盖、杯盖组件和食物料理机
CN108926266B (zh) * 2017-05-27 2021-10-26 广东美的生活电器制造有限公司 消音盖、杯盖组件和食物料理机
CN113994076A (zh) * 2019-06-19 2022-01-28 天纳克汽车经营有限公司 排气系统和消音器

Also Published As

Publication number Publication date
FR2598176A1 (fr) 1987-11-06
DE3672829D1 (de) 1990-08-23
FR2598176B1 (fr) 1990-01-19
EP0243559B1 (de) 1990-07-18
ATE54721T1 (de) 1990-08-15
ES2002833A6 (es) 1988-10-01

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