CN201749667U - Beam-cavity resonant silencer - Google Patents
Beam-cavity resonant silencer Download PDFInfo
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- CN201749667U CN201749667U CN2010201381915U CN201020138191U CN201749667U CN 201749667 U CN201749667 U CN 201749667U CN 2010201381915 U CN2010201381915 U CN 2010201381915U CN 201020138191 U CN201020138191 U CN 201020138191U CN 201749667 U CN201749667 U CN 201749667U
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- sound absorption
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- cotton
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Abstract
A beam-cavity resonant silencer comprises a flange, an outer frame plate, a micro-seam perforation plate, an tubular orifice plate, a beam cavity and sound absorption cotton, wherein the two ends of the tubular orifice plate are respectively connected with a flange interface, a layer of sound absorption cotton covers the outer side of the orifice plate, and the beam cavity covers the outer side of the sound absorption cotton and comprises the micro-seam perforation plate, pipe bundles, the outer frame plate and an endplate; and the micro-seam perforation plate encompasses the outer side of the sound absorption cotton, a pipe bundle is respectively connected to each pipe fitting on the outer side of the micro-seam perforation plate, the outer frame plate is arranged on the outer side of the beam cavity, and the end plate is covered with the outer frame plate, the micro-seam perforation plate and the two ends of the sound absorption cotton. The utility model has the benefits that a compound resonance sound absorption structure of a flexible pipe bundle micro-seam perforation plate is applied to the beam-cavity resonant silencer, and the pipe bundle perforation plate resonance sound absorption structure, a micro-seam sound absorption structure and multi-porous fiber sound absorption material are combined, thereby increasing the sound absorption coefficient and sound absorption resistance of the compound sound absorption structure and widening the sound absorption frequency band thereof.
Description
Technical field
The utility model relates to a kind of bundle chamber resonance exhaust silencer, is mainly used in the pipe silencer in the central air conditioning industry, is a kind of model muffler in this field.
Background technology
Air is the media of sound transmission, sound wave is propagated in air, the air of viscous damping produces friction by small space the time, acoustic energy is transformed into heat energy, if at small space rear design one enclosed cavity, when sound wave vibrates (resonance) repeatedly in cavity, will make more acoustic energy change heat energy into, make acoustic attenuation, play the effect of noise elimination.Porous fibrous material can reduce the reflection of sound wave, also is a kind of version of noise elimination.Based on these architectural characteristics, people have designed various noise elimination products and have been applied to every field.
Sound suppressor roughly is divided three classes at present: resistance formula sound suppressor, anti-formula sound suppressor and impedance complex formula sound suppressor generally are used for into exhaust duct.Wherein:
A, resistance formula sound suppressor: the sound absorption principle that filling porous fiber acoustic absorbant utilizes the acoustic energy dissipation to absorb behind the inwall orifice plate reaches the purpose of noise elimination.Be characterized in that cost simple in structure is low, be applicable to the elimination high frequency noise.
B, anti-formula sound suppressor: inwall is laid microwell plate, and the microwell plate back is a resonant cavity, and sound wave enters resonant cavity by micropore, and sound wave is consumed energy in the process of vibration, reaches the purpose of noise elimination.Characteristics: cost resistivity formula sound suppressor height is applicable to the intermediate frequency noise reduction.
C, impedance complex formula sound suppressor: gather the design feature of above two kinds of sound suppressors, suitable frequency range belongs to the wideband noise-reducing silencer also than broad.
Because the various sound suppressors that design is at present used are perplexing the insider to all undesirable this difficult problem of the noise reduction of low-frequency noise always.The suburbs, city has disturbed residents into a pair of implacable contradiction with incity transformer station of power plant noise, the one side city will be developed power consumption and increase sharply, noise effect resident's studying and living on the other hand, low-frequency noise particularly, the long transmission distance penetration power is strong, influence people's rest greatly the dead of night, live in for a long time and can cause insomnia in such environment; Neurasthenia; Diseases such as melancholia, especially even more serious to old man baby pregnant woman's healthy influence.
Summary of the invention
The utility model aims to provide a kind of bundle chamber resonance exhaust silencer, to solve the problem of the noise elimination weak effect that prior art exists.
The technical solution of the utility model is: comprise flange, orifice plate, sound absorption cotton and bundle chamber, orifice plate two ends at tubulose respectively connect a flange-interface, coat one deck sound absorption in the outside of orifice plate cotton, coat the bundle chamber in the cotton outside of this sound absorption, this bundle chamber is made of slit perforated plate, tube bank, exterior deckle board and end plate, the slit perforated plate is coated on the cotton outside of described sound absorption, on this slit perforated plate, be covered with the slit that connects with its both sides, between this adjacent slit, be provided with through hole, be connected with tube bank in the outer end of this through hole; The outside in this bundle chamber is an exterior deckle board, and the two ends of this exterior deckle board, slit perforated plate and described sound absorption cotton all are coated in the end plate.
Described tube bank is connected with the through hole of described slit perforated plate is inner by pipe adapter; This tube bank adopts flexible plastics or rubber to make.
The beneficial effects of the utility model are: flexibility is restrained slit perforated plate composite resonance sound absorption structure applications in sound suppressor, the sound absorption principle that flexible tube bank slit perforated plate composite resonance sound absorption structure utilizes lumen coupled resonance and slit resonance and multiporous fiber acoustic absorbant acoustic energy to dissipate and absorb, tube bundle perforated plate resonance sound-absorbing structure and slit sound absorption structure, the triplicity of multiporous fiber acoustic absorbant are got up, not only obviously increase the acoustical absorption coefficient and the acoustic resistance of compound sound-absorption structural, also widened sound sucting band simultaneously.
Description of drawings
Fig. 1 is a perspective view of the present utility model;
Fig. 2 is the structural representation of an end among Fig. 1;
Fig. 3 is the A-A cut-open view of Fig. 2;
Fig. 4 is the enlarged drawing at B place among Fig. 3;
Fig. 5 is the partial schematic diagram of the utility model orifice plate one side;
Fig. 6 is the partial schematic diagram of the utility model slit perforated plate one side;
Fig. 7 is the C-C cut-open view of Fig. 6.
Description of reference numerals: 1, flange, 2, the sound suppressor urceolus, 3, the slit perforated plate, 31, slit, 4, orifice plate, 41, the sound absorption hole on the orifice plate, 5, the bundle chamber, 6, sound absorption is cotton, 7, end plate, 8, tube bank, 9, self-tapping screw, 10, pipe adapter, 11, through hole.
Embodiment
Referring to Fig. 1～Fig. 7, the utility model comprises flange 1, exterior deckle board 2, slit perforated plate 3, orifice plate 4, bundle chamber 5 and sound absorption cotton 6, orifice plate 4 two ends at tubulose respectively connect a flange-interface 1, coat one deck sound absorption cotton 6 in the outside of orifice plate 4, coat bundle chamber 5 in the outside of this sound absorption cotton 6, this bundle chamber 5 is one by slit perforated plate 3, tube bank 8, exterior deckle board 2 and end plate 7 constitute, slit perforated plate 3 is coated on the outside of described sound absorption cotton 6, on this slit perforated plate 3, be covered with the slit 31 that connects with its both sides, between this adjacent slit 31, be provided with through hole 11, at this through hole inner connection tube joint 10, connect tube bank 8 (entangle or bonding) in the outer end of pipe adapter 10.The outside in this bundle chamber 5 is exterior deckle boards 2, and the two ends of this exterior deckle board 2, slit perforated plate 3 and described sound absorption cotton 6 all are coated in the end plate 7.This end plate 7 is by bight 71 and interface portion 72 usefulness self-tapping screws 9 be formed by connecting (referring to Fig. 4).As can be seen from Figure 3, exterior deckle board 2, slit perforated plate 3 and end plate 7 constitute a sealed hollow, and this tube bank 8 is enclosed in this cavity.
On orifice plate 4, be covered with sound absorption hole 41.Tube bank 8 adopts flexible material (as flexible plastic tube or rubber tube) to make natural torsion.The material of slit perforated plate 3 is a sheet metal.
Bundle of the present utility model chamber 5 is flexible tube bank slit perforated plate composite resonance sound absorption structure, utilize the sound absorption principle of lumen coupled resonance and slit resonance, the two combines with tube bundle perforated plate resonance sound-absorbing structure and slit sound absorption structure, (increases acoustic resistance, strengthens sound absorption by pipe range and the Pipe bundle structure modulating action to resonance absorbing peak and sound sucting band; Increase acoustic mass, impel resonance absorbing peak to shift to low frequency; Sound sucting band is widened in modulation), thus acoustical absorption coefficient increased, particularly strengthen effective absorption of centering, low-frequency noise, utilize slit resonance to improve the medium-high frequency acoustically effective simultaneously, further widen the sound sucting band of tube bundle perforated plate resonance sound-absorbing structure.Experiment shows, because tube bank 8 is longer, can be dark much larger than the chamber in bundle chamber 5, the air column that participates in to-and-fro movement in the tube bank and be subjected in the more traditional perforation board resonance sound absorption structure aperture of air column of viscous damping wants many, it is big that acoustic resistance is wanted, not only its absorption coefficient is bigger than traditional perforation board resonance sound absorption structure, and its sound sucting band is also owing to the reason of lumen coupled resonance is wideer than traditional perforation board resonance sound absorption structure.Pipe range is most important for resonant sound-absorbing tube bundle type perforated-plate structure, when the flexible pipe beam tube reaches the trough that to a certain degree helps avoid the sound absorption of slit perforation board resonance sound absorption structure, impels absorption peak to move to low frequency, widens sound sucting band.Utilize the good characteristics of fiber acoustic absorbant medium-high frequency acoustically effective simultaneously, tube bundle perforated plate resonance sound-absorbing structure and slit sound absorption structure and the triplicity of fiber acoustic absorbant are got up, realize the broadband sound absorption of composite structure.
In noise elimination laboratory, labyrinth the utility model bundle chamber resonance exhaust silencer being implemented test (is installed in series the utility model bundle chamber resonance exhaust silencer at the exhaust duct of blower fan outlet, inner blower import noise in noise elimination laboratory, labyrinth is tested), test result shows: the fan noise of 93-97dBA is eliminated the noise through the utility model sound suppressor, and sound suppressor outlet noise has been reduced to test environment ground unrest 39-42dBA.Not only middle and high audio-frequency noise is decayed significantly, and low-frequency noise has also obtained effective control.
Claims (2)
1. restraint the chamber resonance exhaust silencer for one kind, it is characterized in that, comprise flange, orifice plate, sound absorption cotton and bundle chamber, orifice plate two ends at tubulose respectively connect a flange-interface, coat one deck sound absorption in the outside of orifice plate cotton, coat the bundle chamber in the cotton outside of this sound absorption, this bundle chamber is made of slit perforated plate, tube bank, exterior deckle board and end plate, the slit perforated plate is coated on the cotton outside of described sound absorption, on this slit perforated plate, be covered with the slit that connects with its both sides, between this adjacent slit, be provided with through hole, be connected with tube bank in the outer end of this through hole; The outside in this bundle chamber is an exterior deckle board, and the two ends of this exterior deckle board, slit perforated plate and described sound absorption cotton all are coated in the end plate.
2. bundle according to claim 1 chamber resonance exhaust silencer is characterized in that, described tube bank is connected with the through hole of described slit perforated plate is inner by pipe adapter; This tube bank adopts flexible plastics or rubber to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201381915U CN201749667U (en) | 2010-03-23 | 2010-03-23 | Beam-cavity resonant silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201381915U CN201749667U (en) | 2010-03-23 | 2010-03-23 | Beam-cavity resonant silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201749667U true CN201749667U (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201381915U Expired - Lifetime CN201749667U (en) | 2010-03-23 | 2010-03-23 | Beam-cavity resonant silencer |
Country Status (1)
| Country | Link |
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| CN (1) | CN201749667U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645011A (en) * | 2012-04-17 | 2012-08-22 | 广州铭铉净化设备科技有限公司 | Sinusoidal micropore plate muffler of air conditioning system |
| CN102954574A (en) * | 2011-08-19 | 2013-03-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Buffer and air conditioner with same |
| CN104165450A (en) * | 2014-06-09 | 2014-11-26 | 北京绿创声学工程设计研究院有限公司 | Power recovery type tubular muffler |
| CN108001478A (en) * | 2017-12-21 | 2018-05-08 | 中国铁路总公司 | A kind of composite muffler for the exhaust of hump yard car retarder clack box |
| CN108682411A (en) * | 2018-05-16 | 2018-10-19 | 南京大学 | A kind of broad band low frequency acoustic muffler |
| CN109036362A (en) * | 2018-06-19 | 2018-12-18 | 南京大学 | A kind of broad band low frequency acoustics sound absorber |
| CN110428800A (en) * | 2019-08-28 | 2019-11-08 | 宝钢空调（泰州）有限公司 | A kind of pre- insulation impedance composite muffler |
| CN113217475A (en) * | 2021-05-24 | 2021-08-06 | 武汉理工大学 | Noise reduction device of centrifugal compressor |
| CN113251233A (en) * | 2021-04-28 | 2021-08-13 | 北京理工大学 | Liquid pipeline sound attenuation system based on underwater wide and low frequency sound insulation metal-based metamaterial design |
| CN114486134A (en) * | 2021-12-17 | 2022-05-13 | 中国航发湖南动力机械研究所 | Vibration fatigue test radiation noise monitoring device |
-
2010
- 2010-03-23 CN CN2010201381915U patent/CN201749667U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954574A (en) * | 2011-08-19 | 2013-03-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Buffer and air conditioner with same |
| CN102645011A (en) * | 2012-04-17 | 2012-08-22 | 广州铭铉净化设备科技有限公司 | Sinusoidal micropore plate muffler of air conditioning system |
| CN104165450A (en) * | 2014-06-09 | 2014-11-26 | 北京绿创声学工程设计研究院有限公司 | Power recovery type tubular muffler |
| CN108001478A (en) * | 2017-12-21 | 2018-05-08 | 中国铁路总公司 | A kind of composite muffler for the exhaust of hump yard car retarder clack box |
| CN108682411A (en) * | 2018-05-16 | 2018-10-19 | 南京大学 | A kind of broad band low frequency acoustic muffler |
| CN109036362A (en) * | 2018-06-19 | 2018-12-18 | 南京大学 | A kind of broad band low frequency acoustics sound absorber |
| CN110428800A (en) * | 2019-08-28 | 2019-11-08 | 宝钢空调（泰州）有限公司 | A kind of pre- insulation impedance composite muffler |
| CN113251233A (en) * | 2021-04-28 | 2021-08-13 | 北京理工大学 | Liquid pipeline sound attenuation system based on underwater wide and low frequency sound insulation metal-based metamaterial design |
| CN113251233B (en) * | 2021-04-28 | 2022-07-19 | 北京理工大学 | Liquid pipeline sound attenuation system based on underwater wide and low frequency sound insulation metal-based metamaterial design |
| CN113217475A (en) * | 2021-05-24 | 2021-08-06 | 武汉理工大学 | Noise reduction device of centrifugal compressor |
| CN114486134A (en) * | 2021-12-17 | 2022-05-13 | 中国航发湖南动力机械研究所 | Vibration fatigue test radiation noise monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Liu Dongjie Document name: Notification to Go Through Formalities of Registration |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model patent |
Correction item: Patentee Correct: Beijing Jing'antiancheng Noise Control Technology Co., Ltd. False: Beijing JingAn Tiancheng Noise Control Technology Co., Ltd. Number: 07 Page: The title page Volume: 27 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Patentee Correct: Beijing Jing'antiancheng Noise Control Technology Co., Ltd. False: Beijing JingAn Tiancheng Noise Control Technology Co., Ltd. Number: 07 Volume: 27 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110216 |
|
| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Jing'antiancheng Noise Control Technology Co.,Ltd. Document name: Notification of Expiration of Patent Right Duration |
|
| DD01 | Delivery of document by public notice |