CN106014545A - Novel silencer for engine - Google Patents

Novel silencer for engine Download PDF

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Publication number
CN106014545A
CN106014545A CN201610507562.4A CN201610507562A CN106014545A CN 106014545 A CN106014545 A CN 106014545A CN 201610507562 A CN201610507562 A CN 201610507562A CN 106014545 A CN106014545 A CN 106014545A
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CN
China
Prior art keywords
cavity
chamber
micro
partition
plate
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Granted
Application number
CN201610507562.4A
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Chinese (zh)
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CN106014545B (en
Inventor
田子正
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Quanzhou Industrial Co Ltd
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Quanzhou Industrial Co Ltd
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Priority to CN201610507562.4A priority Critical patent/CN106014545B/en
Publication of CN106014545A publication Critical patent/CN106014545A/en
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Publication of CN106014545B publication Critical patent/CN106014545B/en
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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
    • F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • 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
    • F01N1/08—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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/10—Plastic foam
    • 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
    • F01N2470/02—Tubes being perforated
    • 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
    • F01N2490/08—Two or more expansion chambers in series separated by apertured walls only

Abstract

The invention discloses a novel silencer for an engine. The novel silencer comprises a cavity, an outer shell, an inner wall, glass fiber cotton, an air inlet pipe, a damping hole plate, a first cavity, a first partition, a center partition, a second cavity, an air guiding pipe, a micro perforated plate, wave crest sound absorption sponge, a second partition, a third cavity, a porous expansion perlite layer, a closed hole type foam plastic layer, a porous asbestos cement plate layer, an air outlet pipe, micro through holes and micro small holes. The cavity comprises the outer shell and the inner wall. The cavity is internally provided with the damping hole plate, the first partition, the second partition, the first cavity, the second cavity and the third cavity. According to the novel silencer for the engine, simplicity of the noise reduction theory and method adopted by existing noise reduction equipment is changed, the beneficial effects of damping noise reduction, resistance noise reduction, micro perforated plate noise reduction and small hole noise reduction are integrated, the low frequency sound wave, the intermediate frequency sound wave, the high frequency sound wave and the ultrahigh frequency sound wave in noise can be effectively absorbed, pollution caused by noise is reduced to the maximum degree, and the health of the human body is protected.

Description

A kind of electromotor Novel muffler
Technical field
The present invention relates to deafener field, be specially a kind of electromotor Novel muffler.
Background technology
Acoustic filter is mounted on the gas channel of air powered equipment or in air inlet system and exhaust system, reduce the device of noise, its effect is to absorb the very noisy that waste gas produces, to eliminate, to reduce the impact of Noise upon Environment, existing acoustic filter kind is a lot, but the structure and working principle of these deafeners self does not has the biggest change, and often cannot effectively remove the sound wave of each frequency range in noise, cause absorbing sound and lowering noise DeGrain, in consideration of it, it is proposed that a kind of electromotor Novel muffler.
Summary of the invention
It is an object of the invention to provide a kind of electromotor Novel muffler, with the problem solving to propose in above-mentioned background technology.
nullFor achieving the above object，The present invention provides following technical scheme: a kind of electromotor Novel muffler，Including cavity、Shell、Inwall、Glass fibre cotton、Air inlet pipe、Damping orifice plate、First chamber、First dividing plate、Central partition plate、Second chamber、Airway、Microperforated panel、Crest sound-absorbing sponge、Second partition、3rd chamber、Porous expanded pearlite rock stratum、Obturator-type foam layer、Porous asbestos cement laminates、Escape pipe、Micro through-hole and miniature aperture，Described cavity includes shell and inwall，It is filled with glass fibre cotton between described shell and inwall，Described cavity high order end position is provided with air inlet pipe，Damping orifice plate it is provided with on the right side of described air inlet pipe，Described damping orifice plate is provided with the first dividing plate away from air inlet pipe side，Described first dividing plate centre position is provided with one piece of central partition plate to inwall centre position, the cavity rightmost side，Described first dividing plate is provided with second partition away from damping orifice plate side，Cavity is divided into the first chamber by described first dividing plate and second partition the most successively、Second chamber and the 3rd chamber，Second chamber and the 3rd chamber are divided into upper and lower two parts by described central partition plate，In the described second chamber first half, centre position is provided with airway，Described airway side is provided around microperforated panel，Crest sound-absorbing sponge it is filled with between described microperforated panel and inwall，It is provided with porous expanded pearlite rock stratum in the described 3rd chamber first half、Obturator-type foam layer and porous asbestos cement laminates，Described cavity low order end is provided with escape pipe.
Preferably, described inner wall surface is provided with micro-interstices and the hole of some connection glass fibre cottons, in order to absorb the acoustic wave energy injected.
Preferably, described damping orifice plate has some micro through-holes, and micro through-hole is damping on orifice plate in matrix arrangement.
Preferably, described airway has some micro through-holes, and micro through-hole on airway in matrix arrangement.
Preferably, described microperforated panel is the simple metal thin plate that thickness is less than 1mm, has some miniature apertures on microperforated panel, and the aperture of these miniature apertures is respectively less than mm, and miniature aperture on microperforated panel in matrix arrangement.
Preferably, described second partition has some micro through-holes, and micro through-hole on second partition in matrix arrangement.
Preferably, described microperforated panel and crest sound-absorbing sponge respectively set one group in the second chamber top and the bottom, and often group is all distributed around airway.
Preferably, described porous expanded pearlite rock stratum, obturator-type foam layer and porous asbestos cement laminates are all respectively provided with four groups in the 3rd chamber top and the bottom, often group linear transverse is arranged as three, it is followed successively by porous expanded pearlite rock stratum, obturator-type foam layer and porous asbestos cement laminates from left to right, four groups arrange at tetragonal symmetry up and down respectively, and are each attached on inwall and central partition plate.
nullCompared with prior art，The invention has the beneficial effects as follows: waste gas enters cavity from air inlet pipe，Sound wave first with contact internal walls，Inner wall surface is provided with micro-interstices and the hole of numerous connection glass fibre cotton，A part of acoustic energy rubs in the hole of porous material and changes into thermal energy consumption and dissipate，Tentatively reduce the medium-high frequency noise in air-flow，This is the principle utilizing resistive noise reduction，Then waste gas enters the first chamber through damping orifice plate，Gas sprays after entering micro through-hole，Air-flow so can be made to be caused the abrupt change of cross-section because compressing，The medium and low frequency slowed noise in air-flow can be made，This is the principle utilizing resistant noise-reducing，Air-flow enters airway from the first chamber，Spouting from the micro through-hole of airway again，This process uses the principle of aperture noise reduction，The frequency making jet noise shifts to high frequency and hyperfrequency，Subsequently enter microperforated panel，Miniature aperture on microperforated panel uses micropunch noise reduction principle to the absorption of pneumatic noise，Pneumatic noise is had good sound-absorbing effect，Air-flow enters crest sound-absorbing sponge through microperforated panel，High frequency noise in air-flow is effectively absorbed crest by sound-absorbing sponge，Subsequently enter the 3rd chamber，The porous expanded pearlite rock stratum set gradually in 3rd chamber、Obturator-type foam layer and porous asbestos cement laminates can be respectively to the medium-high frequencies in air-flow、Intermediate frequency and low frequency noise carry out further absorption process，The air-flow finally processed through multilamellar sound-deadening and noise-reducing is discharged from escape pipe，This electromotor Novel muffler changes the theoretical unicity with method of noise reduction that existing muffling device is taked，Collect resistive noise reduction、Resistant noise-reducing、The advantage of microperforated panel noise reduction and aperture noise reduction is in one，Can effectively absorb the low frequency in noise、Intermediate frequency、High frequency and hyperfrequency sound wave，Reduce the pollution that noise produces to greatest extent，Protection health.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the second chamber side view；
Fig. 3 is the 3rd chamber side view；
In figure: cavity 1, shell 2, inwall 3, glass fibre cotton 4, air inlet pipe 5, damping orifice plate the 6, first chamber the 7, first dividing plate 8, central partition plate the 9, second chamber 10, airway 11, microperforated panel 12, crest sound-absorbing sponge 13, second partition the 14, the 3rd chamber 15, porous expanded pearlite rock stratum 16, obturator-type foam layer 17, porous asbestos cement laminates 18, escape pipe 19, micro through-hole 20 and miniature aperture 21.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
nullRefer to Fig. 1-3，The present invention provides a kind of technical scheme: a kind of electromotor Novel muffler，Including cavity 1、Shell 2、Inwall 3、Glass fibre cotton 4、Air inlet pipe 5、Damping orifice plate 6、First chamber 7、First dividing plate 8、Central partition plate 9、Second chamber 10、Airway 11、Microperforated panel 12、Crest sound-absorbing sponge 13、Second partition 14、3rd chamber 15、Porous expanded pearlite rock stratum 16、Obturator-type foam layer 17、Porous asbestos cement laminates 18、Escape pipe 19、Micro through-hole 20 and miniature aperture 21，Cavity 1 includes shell 2 and inwall 3，Glass fibre cotton 4 it is filled with between shell 2 and inwall 3，Inwall 3 surface is provided with micro-interstices and the hole of some connection glass fibre cottons 4，In order to absorb the acoustic wave energy injected，Cavity 1 high order end position is provided with air inlet pipe 5，Damping orifice plate 6 it is provided with on the right side of air inlet pipe 5，Some micro through-holes 20 are had on damping orifice plate 6，And micro through-hole 20 is damping on orifice plate 6 in matrix arrangement，Damping orifice plate 6 is provided with the first dividing plate 8 away from air inlet pipe 5 side，First dividing plate 8 centre position is provided with one piece of central partition plate 9 to inwall 3 centre position, cavity 1 rightmost side，First dividing plate 8 is provided with second partition 14 away from damping orifice plate 6 side，Some micro through-holes 20 are had on second partition 14，And micro through-hole 20 on second partition 14 in matrix arrangement，Cavity 1 is divided into the first chamber 7 by the first dividing plate 8 and second partition 14 the most successively、Second chamber 10 and the 3rd chamber 15，Second chamber 10 and the 3rd chamber 15 are divided into upper and lower two parts by central partition plate 9，In second chamber 10 first half, centre position is provided with airway 11，Some micro through-holes 20 are had on airway 11，And micro through-hole 20 on airway 11 in matrix arrangement，Airway 11 side is provided around microperforated panel 12，Microperforated panel 12 is less than the simple metal thin plate of 1mm for thickness，Microperforated panel 12 has some miniature apertures 21，The aperture of these miniature apertures 21 is respectively less than 1mm，And miniature aperture 21 on microperforated panel 12 in matrix arrangement，Crest sound-absorbing sponge 13 it is filled with between microperforated panel 12 and inwall 3，Microperforated panel 12 and crest sound-absorbing sponge 13 respectively set one group in the second chamber 10 top and the bottom，Often group is all distributed around airway 11，It is provided with porous expanded pearlite rock stratum 16 in 3rd chamber 15 first half、Obturator-type foam layer 17 and porous asbestos cement laminates 18，Porous expanded pearlite rock stratum 16、Obturator-type foam layer 17 and porous asbestos cement laminates 18 are all respectively provided with four groups in the 3rd chamber 15 top and the bottom，Often group linear transverse is arranged as three，It is followed successively by porous expanded pearlite rock stratum 16 from left to right、Obturator-type foam layer 17 and porous asbestos cement laminates 18，Four groups are arranged at tetragonal symmetry up and down respectively，And be each attached on inwall 3 and central partition plate 9，Cavity 1 low order end is provided with escape pipe 19.
nullOperation principle: waste gas enters cavity 1 from air inlet pipe 5，First sound wave contacts with inwall 3，Inwall 3 surface is provided with micro-interstices and the hole of some connection glass fibre cottons 4，A part of acoustic energy rubs in the hole of porous material and changes into thermal energy consumption and dissipate，Tentatively reduce the medium-high frequency noise in air-flow，This is the principle utilizing resistive noise reduction，Then waste gas enters the first chamber 7 through damping orifice plate 6，Gas sprays after entering micro through-hole 20，Air-flow so can be made to be caused the abrupt change of cross-section because compressing，The medium and low frequency slowed noise in air-flow can be made，This is the principle utilizing resistant noise-reducing，Air-flow enters airway 11 from the first chamber 7，Inner spouting from the micro through-hole 20 of airway 11 again，This process uses the principle of aperture noise reduction，The frequency making jet noise shifts to high frequency and hyperfrequency，Subsequently enter microperforated panel 12，Miniature aperture 21 on microperforated panel 12 uses micropunch noise reduction principle to the absorption of pneumatic noise，Pneumatic noise is had good sound-absorbing effect，Air-flow enters crest sound-absorbing sponge 13 through microperforated panel 12，High frequency noise in air-flow is effectively absorbed by crest sound-absorbing sponge 13，Subsequently enter the 3rd chamber 15，The porous expanded pearlite rock stratum 16 set gradually in 3rd chamber 15、Obturator-type foam layer 17 and porous asbestos cement laminates 18 can be respectively to the medium-high frequencies in air-flow、Intermediate frequency and low frequency noise carry out further absorption process，The air-flow finally processed through multilamellar sound-deadening and noise-reducing is discharged from escape pipe 19.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, being appreciated that and these embodiments can carry out multiple change without departing from the principles and spirit of the present invention, revise, replace and modification, the scope of the present invention be defined by the appended.

Claims (8)

  1. null1. an electromotor Novel muffler，Including cavity (1)、Shell (2)、Inwall (3)、Glass fibre cotton (4)、Air inlet pipe (5)、Damping orifice plate (6)、First chamber (7)、First dividing plate (8)、Central partition plate (9)、Second chamber (10)、Airway (11)、Microperforated panel (12)、Crest sound-absorbing sponge (13)、Second partition (14)、3rd chamber (15)、Porous expanded pearlite rock stratum (16)、Obturator-type foam layer (17)、Porous asbestos cement laminates (18)、Escape pipe (19)、Micro through-hole (20) and miniature aperture (21)，It is characterized in that: described cavity (1) includes shell (2) and inwall (3)，Glass fibre cotton (4) it is filled with between described shell (2) and inwall (3)，Described cavity (1) high order end position is provided with air inlet pipe (5)，Described air inlet pipe (5) right side is provided with damping orifice plate (6)，Described damping orifice plate (6) is provided with the first dividing plate (8) away from air inlet pipe (5) side，Described first dividing plate (8) centre position is provided with one piece of central partition plate (9) to inwall (3) centre position, cavity (1) rightmost side，Described first dividing plate (8) is provided with second partition (14) away from damping orifice plate (6) side，Cavity (1) is divided into the first chamber (7) by described first dividing plate (8) and second partition (14) the most successively、Second chamber (10) and the 3rd chamber (15)，Second chamber (10) and the 3rd chamber (15) are divided into upper and lower two parts by described central partition plate (9)，In described second chamber (10) first half, centre position is provided with airway (11)，Described airway (11) side is provided around microperforated panel (12)，Crest sound-absorbing sponge (13) it is filled with between described microperforated panel (12) and inwall (3)，It is provided with porous expanded pearlite rock stratum (16) in described 3rd chamber (15) first half、Obturator-type foam layer (17) and porous asbestos cement laminates (18)，Described cavity (1) low order end is provided with escape pipe (19).
  2. A kind of electromotor Novel muffler the most according to claim 1, it is characterised in that: described inwall (3) surface is provided with micro-interstices and the hole of some connection glass fibre cottons (4), in order to absorb the acoustic wave energy injected.
  3. A kind of electromotor Novel muffler the most according to claim 1, it is characterised in that: have some micro through-holes (20) on described damping orifice plate (6), and micro through-hole (20) is damping on orifice plate (6) in matrix arrangement.
  4. A kind of electromotor Novel muffler the most according to claim 1, it is characterised in that: have some micro through-holes (20) on described airway (11), and micro through-hole (20) on airway (11) in matrix arrangement.
  5. A kind of electromotor Novel muffler the most according to claim 1, it is characterized in that: described microperforated panel (12) is the simple metal thin plate that thickness is less than 1mm, microperforated panel (12) has some miniature apertures (21), the aperture of these miniature apertures (21) is respectively less than 1mm, and miniature aperture (21) on microperforated panel (12) in matrix arrangement.
  6. A kind of electromotor Novel muffler the most according to claim 1, it is characterised in that: have some micro through-holes (20) on described second partition (14), and micro through-hole (20) on second partition (14) in matrix arrangement.
  7. A kind of electromotor Novel muffler the most according to claim 1, it is characterised in that: described microperforated panel (12) and crest sound-absorbing sponge (13) respectively set one group in the second chamber (10) top and the bottom, and often group is all distributed around airway (11).
  8. A kind of electromotor Novel muffler the most according to claim 1, it is characterized in that: described porous expanded pearlite rock stratum (16), obturator-type foam layer (17) and porous asbestos cement laminates (18) are all respectively provided with four groups in the 3rd chamber (15) top and the bottom, often group linear transverse is arranged as three, it is followed successively by porous expanded pearlite rock stratum (16), obturator-type foam layer (17) and porous asbestos cement laminates (18) from left to right, four groups arrange at tetragonal symmetry up and down respectively, and are each attached on inwall (3) and central partition plate (9).
CN201610507562.4A 2016-06-30 2016-06-30 A kind of engine muffler Active CN106014545B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610507562.4A CN106014545B (en) 2016-06-30 2016-06-30 A kind of engine muffler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610507562.4A CN106014545B (en) 2016-06-30 2016-06-30 A kind of engine muffler

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CN106014545A true CN106014545A (en) 2016-10-12
CN106014545B CN106014545B (en) 2019-09-24

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107476852A (en) * 2017-09-21 2017-12-15 杨春花 A kind of muffler structure
TWI646255B (en) * 2018-04-19 2019-01-01 大葉大學 Vehicle exhaust pipe and sound insulation method thereof
CN110242816A (en) * 2019-06-24 2019-09-17 空气动力学国家重点实验室 A kind of muffler for eliminating discrete high frequency howling
CN110665594A (en) * 2019-09-13 2020-01-10 兰杰 Cement grinding equipment with noise suppression function and enhanced grinding efficiency

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2056508C1 (en) * 1993-01-12 1996-03-20 Могилевский технологический институт Internal combustion engine silencer
WO2006041256A1 (en) * 2004-10-12 2006-04-20 Hwung-Woo Lee A silencer for vehicle
CN103982271A (en) * 2014-05-28 2014-08-13 成都陵川特种工业有限责任公司 Balancing silencer
CN204436529U (en) * 2015-01-14 2015-07-01 福建省键欣电力设备制造有限公司 A kind of diesel generating set smoke-ejecting pipe silencing apparatus
CN204476515U (en) * 2014-12-18 2015-07-15 重庆博沃发动机配件制造有限公司 The silencing apparatus of diesel locomotive power locomotive
CN205689271U (en) * 2016-06-30 2016-11-16 泉州市知产茂业工业设计有限公司 A kind of electromotor Novel muffler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2056508C1 (en) * 1993-01-12 1996-03-20 Могилевский технологический институт Internal combustion engine silencer
WO2006041256A1 (en) * 2004-10-12 2006-04-20 Hwung-Woo Lee A silencer for vehicle
CN103982271A (en) * 2014-05-28 2014-08-13 成都陵川特种工业有限责任公司 Balancing silencer
CN204476515U (en) * 2014-12-18 2015-07-15 重庆博沃发动机配件制造有限公司 The silencing apparatus of diesel locomotive power locomotive
CN204436529U (en) * 2015-01-14 2015-07-01 福建省键欣电力设备制造有限公司 A kind of diesel generating set smoke-ejecting pipe silencing apparatus
CN205689271U (en) * 2016-06-30 2016-11-16 泉州市知产茂业工业设计有限公司 A kind of electromotor Novel muffler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107476852A (en) * 2017-09-21 2017-12-15 杨春花 A kind of muffler structure
TWI646255B (en) * 2018-04-19 2019-01-01 大葉大學 Vehicle exhaust pipe and sound insulation method thereof
CN110242816A (en) * 2019-06-24 2019-09-17 空气动力学国家重点实验室 A kind of muffler for eliminating discrete high frequency howling
CN110665594A (en) * 2019-09-13 2020-01-10 兰杰 Cement grinding equipment with noise suppression function and enhanced grinding efficiency

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