CN106014545B - A kind of engine muffler - Google Patents

A kind of engine muffler Download PDF

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Publication number
CN106014545B
CN106014545B CN201610507562.4A CN201610507562A CN106014545B CN 106014545 B CN106014545 B CN 106014545B CN 201610507562 A CN201610507562 A CN 201610507562A CN 106014545 B CN106014545 B CN 106014545B
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China
Prior art keywords
chamber
partition
micro
hole
wall
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CN201610507562.4A
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Chinese (zh)
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CN106014545A (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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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/082Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/089Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2310/00Selection of sound absorbing or insulating material
    • F01N2310/02Mineral wool, e.g. glass wool, rock wool, asbestos or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2310/00Selection of sound absorbing or insulating material
    • F01N2310/10Plastic foam
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/02Tubes being perforated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00Structure, disposition or shape of gas-chambers
    • F01N2490/08Two or more expansion chambers in series separated by apertured walls only

Abstract

The invention discloses a kind of engine Novel mufflers, including cavity, shell, inner wall, glass fibre cotton, air inlet pipe, damp orifice plate, first chamber, first partition, central partition plate, second chamber, gas-guide tube, microperforated panel, wave crest sound-absorbing sponge, second partition, third chamber, porous expanded pearlite rock stratum, obturator-type foam layer, porous asbestos cement laminates, escape pipe, micro through-hole and miniature aperture, the cavity includes shell and inner wall, the inside cavity includes damping orifice plate, first partition, second partition, first chamber, second chamber and third chamber, the engine changes the unicity for the noise reduction theory and method that existing muffling device is taken with Novel muffler, collect resistive noise reduction, resistant noise-reducing, the advantage of microperforated panel noise reduction and aperture noise reduction is in one, the low frequency in noise can effectively be absorbed , intermediate frequency, high frequency and hyperfrequency sound wave, reduce the pollution that noise generates to greatest extent, protect human health.

Description

A kind of engine muffler
Technical field
The present invention relates to muffler field, specially a kind of engine Novel muffler.
Background technique
Silencer is mounted on the airflow channel of air powered equipment or in air inlet system and exhaust system, reduces the device of noise, It is the very noisy for absorbing exhaust gas and generating that it, which is acted on, and to eliminate, reduce the influence of Noise upon Environment, existing silencer type is very It is more, but there is no too big variations for the structure and working principle of these mufflers itself, and often can not effectively remove each in noise The sound wave of frequency range causes absorbing sound and lowering noise effect unobvious, in consideration of it, it is proposed that a kind of engine Novel muffler.
Summary of the invention
It is mentioned above in the background art to solve the purpose of the present invention is to provide a kind of engine Novel muffler Problem.
To achieve the above object, the invention provides the following technical scheme: a kind of engine Novel muffler, including chamber Body, shell, inner wall, glass fibre cotton, air inlet pipe, damping orifice plate, first chamber, first partition, central partition plate, second chamber, Gas-guide tube, microperforated panel, wave crest sound-absorbing sponge, second partition, third chamber, porous expanded pearlite rock stratum, obturator-type foam plastic The bed of material, porous asbestos cement laminates, escape pipe, micro through-hole and miniature aperture, the cavity include shell and inner wall, described outer Glass fibre cotton is filled between shell and inner wall, cavity left end position is equipped with air inlet pipe, is equipped on the right side of the air inlet pipe Damp orifice plate, the damping orifice plate far from air inlet pipe side equipped with first partition, the first partition middle position to cavity most Right side inner wall middle position is equipped with one piece of central partition plate, and the first partition is equipped with second partition, institute far from damping orifice plate side It states first partition and second partition and cavity is successively divided into first chamber, second chamber and third chamber from left to right, it is described Second chamber and third chamber are divide into upper part and lower part by central partition plate, and middle position is equipped with and leads in the second chamber upper half Tracheae, gas-guide tube side surrounding are equipped with microperforated panel, wave crest sound-absorbing sponge are filled between the microperforated panel and inner wall, Porous expanded pearlite rock stratum, obturator-type foam layer and porous asbestos cement laminates are equipped in the third chamber upper half, The cavity right end is equipped with escape pipe.
Preferably, the inner wall surface is equipped with the micro-interstices and hole of several connection glass fibre cottons, penetrates to absorb The acoustic wave energy entered.
Preferably, several micro through-holes are provided on the damping orifice plate, and micro through-hole is in matrix form on damping orifice plate Arrangement.
Preferably, several micro through-holes are provided on the gas-guide tube, and micro through-hole is in matrix arrangement on gas-guide tube.
Preferably, the microperforated panel is the proof gold metal thin plate that thickness is less than 1mm, is provided on microperforated panel several miniature Aperture, the aperture of these miniature apertures is respectively less than mm, and miniature aperture is in matrix arrangement on microperforated panel.
Preferably, several micro through-holes are provided on the second partition, and micro through-hole is in matrix form on second partition Arrangement.
Preferably, the microperforated panel and wave crest sound-absorbing sponge respectively set one group in second chamber top and the bottom, and every group equal It is distributed around gas-guide tube.
Preferably, the porous expanded pearlite rock stratum, obturator-type foam layer and porous asbestos cement laminates are in third Chamber top and the bottom are respectively provided with four groups, and every group of linear transverse is arranged as three, are followed successively by porous expanded perlite from left to right Layer, obturator-type foam layer and porous asbestos cement laminates, four groups are arranged in tetragonal symmetry up and down respectively, and fixed On inner wall and central partition plate.
Compared with prior art, the beneficial effects of the present invention are: exhaust gas enters cavity from air inlet pipe, sound wave first with inner wall Contact, inner wall surface are equipped with the micro-interstices and hole of numerous connection glass fibre cottons, and a part of sound can be in the hole of porous material It rubs in gap and is converted to thermal energy consumption and dissipates, tentatively reduce the medium-high frequency noise in air-flow, this is the original using resistive noise reduction Reason, then exhaust gas enters first chamber across damping orifice plate, and gas sprays after entering micro through-hole, air-flow can be made because of quilt in this way It compresses and leads to the abrupt change of cross-section, the middle low frequency noise in air-flow can be made to weaken, this is the principle using resistant noise-reducing, and air-flow is from the One chamber enters gas-guide tube, then in the micro through-hole of gas-guide tube it is spouting, this process using aperture noise reduction original Reason, makes the frequency of jet noise shift to high frequency and hyperfrequency, subsequently enters microperforated panel, the miniature aperture on microperforated panel is to gas The absorption of noise is flowed using micropunch noise reduction principle, has good sound-absorbing effect to pneumatic noise, air-flow is through microperforated panel Into wave crest sound-absorbing sponge, wave crest sound-absorbing sponge effectively absorbs the high frequency noise in air-flow, subsequently enters third chamber, Porous expanded pearlite rock stratum, obturator-type foam layer and the porous asbestos cement laminates set gradually in third chamber can be distinguished Further absorption processing is carried out to medium-high frequency, intermediate frequency and the low frequency noise in air-flow, is finally handled through multilayer sound-deadening and noise-reducing Air-flow is discharged from escape pipe, which changes the noise reduction theory and method that existing muffling device is taken with Novel muffler Unicity, integrate the advantage of resistive noise reduction, resistant noise-reducing, microperforated panel noise reduction and aperture noise reduction, can effectively absorb and make an uproar Low frequency, intermediate frequency, high frequency and hyperfrequency sound wave in sound reduce the pollution that noise generates to greatest extent, protect human health.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention;
Fig. 2 is second chamber side view;
Fig. 3 is third chamber side view;
In figure: cavity 1, shell 2, inner wall 3, glass fibre cotton 4, air inlet pipe 5, damping orifice plate 6, first chamber 7, first every Plate 8, central partition plate 9, second chamber 10, gas-guide tube 11, microperforated panel 12, wave crest sound-absorbing sponge 13, second partition 14, third chamber It is room 15, porous expanded pearlite rock stratum 16, obturator-type foam layer 17, porous asbestos cement laminates 18, escape pipe 19, miniature logical Hole 20 and miniature aperture 21.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Fig. 1-3 is please referred to, the present invention provides a kind of technical solution: a kind of engine Novel muffler, including cavity 1, Shell 2, inner wall 3, glass fibre cotton 4, air inlet pipe 5, damping orifice plate 6, first chamber 7, first partition 8, central partition plate 9, second Chamber 10, gas-guide tube 11, microperforated panel 12, wave crest sound-absorbing sponge 13, second partition 14, third 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 inner wall 3, and glass fibre cotton 4 is filled between shell 2 and inner wall 3, and 3 surface of inner wall is equipped with several connections The micro-interstices and hole of glass fibre cotton 4, to absorb the acoustic wave energy of injection, 1 left end position of cavity is equipped with air inlet pipe 5, it is equipped with damping orifice plate 6 on the right side of air inlet pipe 5, damps and is provided with several micro through-holes 20 on orifice plate 6, and micro through-hole 20 is in damping hole It is in matrix arrangement on plate 6, damping orifice plate 6 is equipped with first partition 8,8 middle position of first partition to chamber far from 5 side of air inlet pipe 1 rightmost side inner wall of body, 3 middle position be equipped with one piece of central partition plate 9, first partition 8 far from damping 6 side of orifice plate be equipped with second every Plate 14 is provided with several micro through-holes 20 on second partition 14, and micro through-hole 20 is in matrix arrangement on second partition 14, the Cavity 1 is successively divided into first chamber 7, second chamber 10 and third chamber 15 by one partition 8 and second partition 14 from left to right, Second chamber 10 and third chamber 15 are divide into upper part and lower part by central partition plate 9, and interposition installs in 10 upper half of second chamber There is gas-guide tube 11, several micro through-holes 20 be provided on gas-guide tube 11, and micro through-hole 20 is in matrix arrangement on gas-guide tube 11, Gas-guide tube is equipped with microperforated panel 12 around 11 side, and microperforated panel 12 is the proof gold metal thin plate that thickness is less than 1mm, in microperforated panel Several miniature apertures 21 are provided on 12, the aperture of these miniature apertures 21 is respectively less than 1mm, and miniature aperture 21 is in microperforated panel 12 Upper is in matrix arrangement, and wave crest sound-absorbing sponge 13, microperforated panel 12 and wave crest sound-absorbing are filled between microperforated panel 12 and inner wall 3 Sponge 13 respectively sets one group in 10 top and the bottom of second chamber, and every group surrounds the distribution of gas-guide tube 11,15 upper half of third chamber It is interior to be equipped with porous expanded pearlite rock stratum 16, 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 respectively provided with four in 15 top and the bottom of third chamber Group, every group of linear transverse are arranged as three, are followed successively by porous expanded pearlite rock stratum 16, obturator-type foam layer 17 from left to right With porous asbestos cement laminates 18, four groups are arranged in tetragonal symmetry up and down respectively, and are each attached to inner wall 3 and central partition plate On 9,1 right end of cavity is equipped with escape pipe 19.
Working principle: exhaust gas enters cavity 1 from air inlet pipe 5, and sound wave is contacted with inner wall 3 first, and 3 surface of inner wall is equipped with several The micro-interstices and hole of glass fibre cotton 4 are connected to, a part of sound can rub in the hole of porous material and be converted to thermal energy It dissipates, tentatively reduces the medium-high frequency noise in air-flow, this is the principle using resistive noise reduction, and then exhaust gas passes through damping hole Plate 6 enters first chamber 7, and gas sprays after entering micro through-hole 20, air-flow can be made to cause section to be dashed forward because being compressed in this way Become, the middle low frequency noise in air-flow can be made to weaken, this is the principle using resistant noise-reducing, and air-flow enters air guide from first chamber 7 Pipe 11, then it is inner spouting from the micro through-hole 20 of gas-guide tube 11, this process makes jet using the principle of aperture noise reduction The frequency of noise shifts to high frequency and hyperfrequency, subsequently enters microperforated panel 12, and the miniature aperture 21 on microperforated panel 12 is to air-flow The absorption of noise has good sound-absorbing effect using micropunch noise reduction principle, to pneumatic noise, and air-flow is through microperforated panel 12 Into wave crest sound-absorbing sponge 13, wave crest sound-absorbing sponge 13 effectively absorbs the high frequency noise in air-flow, subsequently enters third Chamber 15, porous expanded pearlite rock stratum 16, obturator-type foam layer 17 and the porous asbestos set gradually in third chamber 15 Cement laminates 18 can carry out further absorption processing to medium-high frequency, intermediate frequency and the low frequency noise in air-flow respectively, final through more The air-flow of layer sound-deadening and noise-reducing processing is discharged from escape pipe 19.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (6)

1. a kind of engine muffler, including cavity (1), shell (2), inner wall (3), glass fibre cotton (4), air inlet pipe (5), Damping orifice plate (6), first partition (8), central partition plate (9), second chamber (10), gas-guide tube (11), micro- is worn at first chamber (7) Orifice plate (12), wave crest sound-absorbing sponge (13), second partition (14), third chamber (15), porous expanded pearlite rock stratum (16), closed pore Type foam layer (17), porous asbestos cement laminates (18), escape pipe (19), micro through-hole (20) and miniature aperture (21), It is characterized by: the cavity (1) includes shell (2) and inner wall (3), inner wall (3) surface is equipped with several connection glass fibers The micro-interstices and hole of vinylon and cotton blend (4) are filled between the shell (2) and inner wall (3) to absorb the acoustic wave energy of injection Glass fibre cotton (4), cavity (1) the left end position are equipped with air inlet pipe (5), and damping hole is equipped on the right side of the air inlet pipe (5) Plate (6) is provided with several micro through-holes (20) on the damping orifice plate (6), and micro through-hole (20) is in square in damping orifice plate (6) Configuration arrangement;The damping orifice plate (6) is equipped with first partition (8) far from air inlet pipe (5) side, and the first partition (8) is intermediate Position is equipped with one piece of central partition plate (9) to cavity (1) rightmost side inner wall (3) middle position, and the first partition (8) is far from damping Orifice plate (6) side be equipped with second partition (14), the first partition (8) and second partition (14) by cavity (1) from left to right according to Secondary to be divided into first chamber (7), second chamber (10) and third chamber (15), the central partition plate (9) is by second chamber (10) It being divide into upper part and lower part with third chamber (15), middle position is equipped with gas-guide tube (11) in second chamber (10) upper half, Microperforated panel (12) are equipped with around beside the gas-guide tube (11), wave is filled between the microperforated panel (12) and inner wall (3) Peak sound-absorbing sponge (13) is equipped with porous expanded pearlite rock stratum (16), obturator-type foam plastic in third chamber (15) upper half The bed of material (17) and porous asbestos cement laminates (18), cavity (1) right end are equipped with escape pipe (19).
2. a kind of engine muffler according to claim 1, it is characterised in that: the gas-guide tube (11) if on be provided with Dry micro through-hole (20), and micro through-hole (20) is in matrix arrangement on gas-guide tube (11).
3. a kind of engine muffler according to claim 1, it is characterised in that: the microperforated panel (12) is thickness Proof gold metal thin plate less than 1mm is provided with several miniature apertures (21) on microperforated panel (12), the hole of these miniature apertures (21) Diameter is respectively less than 1mm, and miniature aperture (21) is in matrix arrangement on microperforated panel (12).
4. a kind of engine muffler according to claim 1, it is characterised in that: be provided on the second partition (14) Several micro through-holes (20), and micro through-hole (20) is in matrix arrangement on second partition (14).
5. a kind of engine muffler according to claim 1, it is characterised in that: the microperforated panel (12) and wave crest Sound-absorbing sponge (13) respectively sets one group in second chamber (10) top and the bottom, and every group surrounds gas-guide tube (11) distribution.
6. a kind of engine muffler according to claim 1, it is characterised in that: the porous expanded pearlite rock stratum (16), obturator-type foam layer (17) and porous asbestos cement laminates (18) are respectively provided in third chamber (15) top and the bottom Four groups, every group of linear transverse is arranged as three, is followed successively by porous expanded pearlite rock stratum (16), obturator-type foamed plastics from left to right Layer (17) and porous asbestos cement laminates (18), four groups are arranged in tetragonal symmetry up and down respectively, and are each attached to inner wall (3) On central partition plate (9).
CN201610507562.4A 2016-06-30 2016-06-30 A kind of engine muffler Active CN106014545B (en)

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Application Number Priority Date Filing Date Title
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CN106014545B true CN106014545B (en) 2019-09-24

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Families Citing this family (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
CN110242816B (en) * 2019-06-24 2021-04-02 中国空气动力研究与发展中心低速空气动力研究所 Silencer device for eliminating discrete high-frequency squeaking
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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Publication number Priority date Publication date Assignee Title
RU2056508C1 (en) * 1993-01-12 1996-03-20 Могилевский технологический институт Internal combustion engine silencer
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

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Publication number Priority date Publication date Assignee Title
KR200371655Y1 (en) * 2004-10-12 2005-01-03 이흥우 A silencer for vehicle

Patent Citations (5)

* 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
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

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