CN201218126Y - Engine exhaust wide-band silencer - Google Patents

Engine exhaust wide-band silencer Download PDF

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Publication number
CN201218126Y
CN201218126Y CNU2008200636089U CN200820063608U CN201218126Y CN 201218126 Y CN201218126 Y CN 201218126Y CN U2008200636089 U CNU2008200636089 U CN U2008200636089U CN 200820063608 U CN200820063608 U CN 200820063608U CN 201218126 Y CN201218126 Y CN 201218126Y
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CN
China
Prior art keywords
noise
cylindrical shell
insulating layer
sound absorption
absorbing
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 - Lifetime
Application number
CNU2008200636089U
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Chinese (zh)
Inventor
贾荷香
冯筱莉
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.)
Positive ascension environment Polytron Technologies Inc
Original Assignee
SICHUAN ZHENGSHENG ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
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 SICHUAN ZHENGSHENG ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD filed Critical SICHUAN ZHENGSHENG ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Priority to CNU2008200636089U priority Critical patent/CN201218126Y/en
Application granted granted Critical
Publication of CN201218126Y publication Critical patent/CN201218126Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a noise lowering and eliminating device used in the engine vent in petroleum and natural gas booster station, CNG gas station, and engineering power equipment, the device is a cylinder formed by an outer noise-insulating layer and an inner noise-absorbing layer, an air inlet pipe is arranged at the lower end of the cylinder, a vent is arranged at the upper end of the cylinder, a plurality of relatively closed noise-absorbing cavities are orderly arranged inside the cylinder from bottom to top, adjacent noise-absorbing cavities are communicated through insert tubes, a resistance silencer is arranged on the vent, among the noise-absorbing cavities, at least the cylinder corresponding to the longest noise-absorbing cavity is a solid structure formed by an outer noise-insulating layer and an inner noise-absorbing layer, other cylinders corresponding to the rest cavities are provided with resonant cavities between the outer noise-insulating layers and the inner noise-absorbing layers, the noise lowering and eliminating device can well implement multifrequency noise elimination.

Description

Engine exhaust wideband silencing apparatus
Technical field
The utility model relates to a kind of denoising device, specifically relates to a kind of denoising device that can carry out the wideband noise elimination, and the noise reduction that is mainly used in the engine exhaust port in petroleum gas booster station, CNG gas station, the engineering power equipment is eliminated the noise.
Background technique
In the practice, during the motor operation, produce bigger noise in its exhaust ports, therefore, handle for the noise elimination of this noise source of engine exhaust port, be the emphasis that effectively reduces its noise pollution always.Chinese patent 01206363.0 discloses a kind of " natural gas engine air exhaust muffler device ", it is a tube structure that is made of outside Sound insulating layer and inner absorbent treatment, lower end at cylindrical shell is provided with suction tude, upper end at cylindrical shell is provided with relief opening, be disposed with several airtight relatively sound absorption cavitys from descending in inner barrel, be communicated with by insertion tube between the adjacent sound absorption cavity, be provided with dissipative muffler at relief opening.
But, the noise of engine exhaust port, have from the 20-4000 hertz, belong to the widescreen noise, during above-mentioned prior art can better be eliminated, low-frequency noise, for the high-frequency noise more than 1000 hertz certain noise reduction effect is arranged, but the noise reduction for the ultralow frequency noise below 31.5 hertz is also not obvious, this is because the processing of ultralow frequency noise is not NBS (GB3096-1993 " standard of environmental noise of urban area ", GB12348-1990 " factory circle of industrial enterprise noise standard ") content of Yao Qiuing, in production practices, usually ignored by people, but, the ultralow frequency noise is because wavelength is very long, often the form with vibration shows, and the starting of oscillation energy is big, easily produces resonance and with the amplification of tens of times of energy, harm to surrounding environment is bigger, therefore, design a kind of silencer that can carry out the wideband noise reduction, become the emphasis of current people's research.
The model utility content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art and a kind of device that can carry out effective noise reduction to broadband noise is provided.
The purpose of this utility model is achieved in that
A kind of engine exhaust wideband silencing apparatus, it is the cylindrical shell that is made of outside Sound insulating layer and inner absorbent treatment, lower end at cylindrical shell is provided with suction tude, upper end at cylindrical shell is provided with relief opening, be disposed with several airtight relatively sound absorption cavitys from descending in inner barrel, be communicated with by insertion tube between the adjacent sound absorption cavity, be provided with dissipative muffler at relief opening, in described several sound absorption cavitys, at least the pairing cylindrical shell of that sound absorption cavity that length is the longest is the solid construction that is made of outside Sound insulating layer and inner absorbent treatment, and the pairing cylindrical shell of all the other cavitys is provided with resonant cavity between its outside Sound insulating layer and inner absorbent treatment.
Further improvement of the utility model is that the length of described several sound absorption cavitys is from reducing successively down; Scheme is preferably, be the described sound absorption cavity that several are arranged from descending, the pairing cylindrical shell of sound absorption cavity bottom is the solid construction that is made of outside Sound insulating layer and inner absorbent treatment, and the cylindrical shell of all the other cavity correspondences is provided with resonant cavity between its outside Sound insulating layer and inner absorbent treatment; In order to strengthen the defening effect to low-frequency noise, better scheme is, the pairing cylindrical shell of sound absorption cavity bottom is the solid construction that is made of two layers of outer Sound insulating layer and the inner absorbent treatment of one deck.
Consider that suction tude place gas flow resistance is bigger, form turbulent flow easily, further improving is that several suction tude are distributed on the same circumference.
The utility model is provided with respectively for the ultralow frequency noise, and low, mid-frequency noise and high-frequency noise carry out the composite structure of sound absorption and insulation.Wherein, at the suction port end, consider that the suction port pneumatic noise is bigger, temperature is higher, the solid sound insulation sound absorption structure that Sound insulating layer that adopts and absorbent treatment form, ultralow frequency noise that can not only penetrating power is stronger are isolated effectively, also thermal insulation effectively, simultaneously, increase the length of sound absorption cavity, can effectively absorb the ultralow frequency noise, in addition, the gas expansion ratio that enters cavity is effectively increased, thereby increased sound deadening capacity; Consider the noise of motor a large amount of be distributed in frequency range low, intermediate frequency, the wavelength of high, medium and low audio-frequency noise is relatively slightly short simultaneously, require relatively low for sound insulation, sound absorption requires relatively more outstanding, so at the cylindrical shell middle part, consider to handle the comprehensive sound deadening capacity of each frequency range emphatically, adopt the structure of resonant cavity that forms between outside Sound insulating layer and the inner absorbent treatment, the absorbent treatment that cooperation is made of orifice plate and sound-absorbing material, form the resonance sound-absorbing structure of combined type, have more specific aim for the absorption of a large amount of noises; In addition, the main absorbing high-frequency noise of the dissipative muffler of exhaust port side.By this by ultralow frequency to low, intermediate frequency, arrive the reducing noise for combined structure of high frequency again, can carry out effective noise reduction process to the noise of wideband, simultaneously, also can be applicable to sound absorption, the working environment that noise insulation factor is bigger.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that A-A of the present utility model is to sectional view.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail; but protection domain of the present utility model has more than and is limited to these examples; such as; dissipative muffler can be selected any in pipe silencer, strip-type silencer, baffle plate type, the honeycomb for use, and the concrete formation of absorbent treatment and Sound insulating layer can be a structure known in those skilled in the art.
Embodiment 1: a kind of engine exhaust wideband silencing apparatus, it is the cylindrical shell 1 that is made of outside Sound insulating layer 2 and inner absorbent treatment 3, Sound insulating layer 2 is by steel plate, skeleton and sound insulating material constitute, absorbent treatment 3 is by steel plate with holes, skeleton and sound-absorbing material constitute, be provided with three in the lower end of cylindrical shell 1 and be distributed on suction tude 4 on the same circumference, be provided with relief opening 5 in the upper end of cylindrical shell 1, in cylindrical shell 1 inside from being disposed with down four airtight relatively sound absorption cavitys 6,7,8,9, be communicated with by insertion tube 10 between the adjacent sound absorption cavity, be provided with dissipative muffler 11 at relief opening 5, described four sound absorption cavitys 6,7,8,9 length, from reducing successively down, sound absorption cavity 6 pairing cylindrical shells 1 bottom are the solid constructions that is made of two layers of outer Sound insulating layer 2 and the inner absorbent treatment 3 of one deck, all the other cavitys 7 that absorb sound, 8, the cylindrical shell 1 of 9 correspondences is provided with resonant cavity 12 between its outside Sound insulating layer 2 and inner absorbent treatment 3.

Claims (4)

1, a kind of engine exhaust wideband silencing apparatus, it is the cylindrical shell that is made of outside Sound insulating layer and inner absorbent treatment, lower end at cylindrical shell is provided with suction tude, upper end at cylindrical shell is provided with relief opening, be disposed with several airtight relatively sound absorption cavitys from descending in inner barrel, be communicated with by insertion tube between the adjacent sound absorption cavity, be provided with dissipative muffler at relief opening, it is characterized in that in described several sound absorption cavitys, at least the pairing cylindrical shell of that sound absorption cavity that length is the longest is the solid construction that is made of outside Sound insulating layer and inner absorbent treatment, and the pairing cylindrical shell of all the other cavitys is provided with resonant cavity between its outside Sound insulating layer and inner absorbent treatment.
2, engine exhaust wideband silencing apparatus according to claim 1 is characterized in that the length of described several sound absorption cavitys, from reducing successively down.
3, engine exhaust wideband silencing apparatus according to claim 1 and 2, it is characterized in that the described sound absorption cavity that several are arranged from descending, the pairing cylindrical shell of sound absorption cavity bottom is the solid construction that is made of outside Sound insulating layer and inner absorbent treatment, and the cylindrical shell of all the other cavity correspondences is provided with resonant cavity between its outside Sound insulating layer and inner absorbent treatment.
4, the engine exhaust wideband silencing apparatus of stating according to claim 1 is characterized in that described suction tude is to constitute by being distributed on the same circumference several.
CNU2008200636089U 2008-05-30 2008-05-30 Engine exhaust wide-band silencer Expired - Lifetime CN201218126Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200636089U CN201218126Y (en) 2008-05-30 2008-05-30 Engine exhaust wide-band silencer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200636089U CN201218126Y (en) 2008-05-30 2008-05-30 Engine exhaust wide-band silencer

Publications (1)

Publication Number Publication Date
CN201218126Y true CN201218126Y (en) 2009-04-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008200636089U Expired - Lifetime CN201218126Y (en) 2008-05-30 2008-05-30 Engine exhaust wide-band silencer

Country Status (1)

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CN (1) CN201218126Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103249941A (en) * 2010-10-26 2013-08-14 韦巴斯托股份公司 Silencer device for a fluid line and heating unit having a silencer device
CN107170436A (en) * 2017-07-26 2017-09-15 安徽理工大学 A kind of collapsible resonance noise reduction method and set composite
CN107564507A (en) * 2017-10-11 2018-01-09 江苏声立方环保科技有限公司 High velocity air exhaust silencer
CN114607496A (en) * 2022-03-01 2022-06-10 正升环境科技股份有限公司 Broadband silencer with purification function

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103249941A (en) * 2010-10-26 2013-08-14 韦巴斯托股份公司 Silencer device for a fluid line and heating unit having a silencer device
CN103249941B (en) * 2010-10-26 2016-03-30 韦巴斯托股份公司 For silencer and the heating equipment with silencer of fluid circuit
CN107170436A (en) * 2017-07-26 2017-09-15 安徽理工大学 A kind of collapsible resonance noise reduction method and set composite
CN107564507A (en) * 2017-10-11 2018-01-09 江苏声立方环保科技有限公司 High velocity air exhaust silencer
CN114607496A (en) * 2022-03-01 2022-06-10 正升环境科技股份有限公司 Broadband silencer with purification function

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: Sichuan Zhengsheng Acoustic Technology Co., Ltd.

Assignor: Sichuan Zhengsheng Environmental Protection Technology Co.,Ltd.

Contract record no.: 2010510000070

Denomination of utility model: Engine exhaust wide-band silencer

Granted publication date: 20090408

License type: Exclusive License

Record date: 20100826

ASS Succession or assignment of patent right

Owner name: SICHUAN ZHENGSHENG ACOUSTIC TECHNOLOGY CO., LTD.

Free format text: FORMER OWNER: ZHENGSHENG ENVIRONMENT PROTECTION SCI. + TECH. CO., LTD., SICHUAN

Effective date: 20140227

COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 610041 CHENGDU, SICHUAN PROVINCE TO: 611130 CHENGDU, SICHUAN PROVINCE

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20140227

Address after: Wenjiang District 611130 of Sichuan city of Chengdu province Chengdu Strait science and Technology Industry Development Park Haike Road West No. 57

Patentee after: Sichuan Zhengsheng Acoustic Technology Co., Ltd.

Address before: 610041, Chengdu, Sichuan province Wenjiang District channel science and Technology Park 388 Taiwan Avenue 4 Building

Patentee before: Sichuan Zhengsheng Environmental Protection Technology Co.,Ltd.

CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: Wenjiang District 611130 of Sichuan city of Chengdu province Chengdu Strait science and Technology Industry Development Park Haike Road West No. 57

Patentee after: Positive ascension environment Polytron Technologies Inc

Address before: Wenjiang District 611130 of Sichuan city of Chengdu province Chengdu Strait science and Technology Industry Development Park Haike Road West No. 57

Patentee before: Sichuan Zhengsheng Acoustic Technology Co., Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20090408