CN204663627U - Be applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination - Google Patents
Be applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination Download PDFInfo
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- CN204663627U CN204663627U CN201520194156.8U CN201520194156U CN204663627U CN 204663627 U CN204663627 U CN 204663627U CN 201520194156 U CN201520194156 U CN 201520194156U CN 204663627 U CN204663627 U CN 204663627U
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Abstract
The utility model discloses the combined impedance silencing apparatus that applicable middle and high, low frequency is eliminated the noise, comprise cylindrical shell, it is characterized in that: in described cylindrical shell, be provided with sound absorption conical pipe, between the inwall of the outside of sound absorption conical pipe to cylindrical shell, be provided with encapsulant layer; The flow outlet of sound absorption conical pipe to cylindrical shell outlet port along between for noise elimination expansion chamber; Sound absorption conical pipe air flow inlet to cylindrical shell ingress port along between be air-flow direct current room.This silencing apparatus, owing to have employed the sound absorption conical pipe be combined with expansion chamber of eliminating the noise, air-flow path extremely exports by entrance the cross section passed through and reduces gradually, and airspeed slowly changes, so reduce air-flow to the impact of sound-absorbing material; The grading structure in cross section is less than the local resistance loss of mutation structure loss, effectively can increase the sound deadening capacity of medium, high frequency; Air-flow flows into noise elimination expansion chamber from the osculum end of sound absorption conical pipe, thus in can effectively increasing, the sound deadening capacity of low frequency.And structure is simple, cost is low, easy cleaning maintenance.
Description
Technical field
The utility model relates to a kind of improvement of impedance muffler, specifically one can not only increase medium, high frequency can increase simultaneously in, low frequency sound deadening capacity, and that air-flow is little to sound material impact, local resistance loss is little, structure is simple, cost of production is low is applicable middle and high, the combined impedance silencing apparatus of low frequency noise elimination.
Background technique
Along with the innovation of the reform in education, teacher's tissue enters on-the-spot teaching in factory and has become ordinary affair, by this teaching practice, find the fast development of the modern industry, noise pollution is more and more serious, and noise has become a kind of public hazards, therefore, just silencing apparatus must be adopted to eliminate to this noise.Silencing apparatus a kind ofly allows air-flow pass through and make the device of noise attentuation, is arranged in the pipeline that air-flow passes through or enters on row, gas port, effectively can reduce air power noise.Through looking through a great amount of information, know and often use dissipative muffler and reactive muffler at present, dissipative muffler is the sound absorption utilizing sound-absorbing material, can effectively reduce medium, high frequency noise; Reactive muffler is during the sudden change in air-flow path cross section reduces, low frequency noise; For the broadband noise covering basic, normal, high frequency band, common solution is combinationally used dissipative muffler and reactive muffler, forms the impedance composite muffler with wideband soundproof effect.But existing impedance composite muffler complex structure, processing and maintenance difficulty are large, and cost of production is high.
Summary of the invention
The purpose of this utility model be to provide one can not only increase medium, high frequency can increase simultaneously in, low frequency sound deadening capacity, and that air-flow is little to sound material impact, local resistance loss is little, structure is simple, easily processing and maintenance, cost of production are low is applicable middle and high, the combined impedance silencing apparatus of low frequency noise elimination.
In order to reach above object, the technological scheme that the utility model adopts is: this is applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination, comprise cylindrical shell, it is characterized in that: in described cylindrical shell, be provided with sound absorption conical pipe, between the inwall of the outside of sound absorption conical pipe to cylindrical shell, be provided with encapsulant layer; The flow outlet of described sound absorption conical pipe to cylindrical shell outlet port along between be noise elimination expansion chamber; The air flow inlet of described sound absorption conical pipe to cylindrical shell ingress port along between be air-flow direct current room.
The utility model is also implemented by following measure: described sound absorption conical pipe is provided with 5, the wherein axis of 1 and the dead in line of cylindrical shell, other 4 symmetrical weeks of being distributed in cylindrical shell, the direction of 5 sound absorption conical pipes is identical, the big opening end of sound absorption conical pipe is air flow inlet, osculum end is flow outlet, and the diameter of flow outlet is 1/3 of air flow inlet diameter.
Described sound absorption conical pipe is that sound-absorbing material makes, as glass fibre cotton, polyurethane etc.; The wall thickness of sound absorption conical pipe can require setting according to actual sound deadening capacity; Described encapsulant layer can select the material that price is lower, as plastic foam material, can reduce cost of production like this
The beneficial effects of the utility model are: this is applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination, owing to have employed sound absorption conical pipe, and be combined with noise elimination expansion chamber, so, air-flow path extremely exports by entrance the cross section passed through and reduces gradually, airspeed can be made slowly to change, thus reduce air-flow to the impact of sound-absorbing material; Meanwhile, the grading structure in cross section is less than the local resistance loss of mutation structure loss, effectively can increase the sound deadening capacity of medium, high frequency; Air-flow flows into noise elimination expansion chamber from the osculum end of sound absorption conical pipe, thus in can effectively increasing, the sound deadening capacity of low frequency.And structure is simple, cost is low, easy cleaning maintenance, and the requirement of wide band sound deadening capacity can be met.
Accompanying drawing explanation
Fig. 1 is structure air flow inlet end schematic side view of the present utility model.
Fig. 2 is structure airflow outlet end schematic side view of the present utility model.
Fig. 3 is that structure of the present utility model is along Figure 1A-A cross-sectional schematic.
In figure: 1, cylindrical shell; 2, absorb sound conical pipe; 21, air flow inlet; 22, flow outlet; 3, encapsulant layer; 4, noise elimination expansion chamber; 5, air-flow direct current room.
Embodiment
The utility model is made with reference to Fig. 1, Fig. 2, Fig. 3.This is applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination, comprise cylindrical shell 1, it is characterized in that: in described cylindrical shell 1, be provided with sound absorption conical pipe 2, encapsulant layer 3 is provided with between the inwall of the outside of sound absorption conical pipe 2 to cylindrical shell 1, sound absorption conical pipe 2 and cylindrical shell 1 are fixed as one, form dissipative muffler by sound absorption conical pipe 2, be mainly used in increasing medium, high frequency sound deadening capacity; The outlet port of flow outlet 22 to the cylindrical shell 1 of described sound absorption conical pipe 2 along between be noise elimination expansion chamber 4, form reactive muffler, in being mainly used in increasing, low frequency sound deadening capacity; Be air-flow direct current room 5 between the ingress port edge of air flow inlet 21 to the cylindrical shell 1 of described sound absorption conical pipe 2.
As improvement of the present utility model: described sound absorption conical pipe 2 is provided with 5, the wherein axis of 1 and the dead in line of cylindrical shell 1, other 4 symmetrical weeks of being distributed in cylindrical shell 1, the direction of 5 sound absorption conical pipes 2 is identical, the big opening end of sound absorption conical pipe 2 is air flow inlet 21, osculum end is flow outlet 22, and the diameter of flow outlet 22 is 1/3 of air flow inlet 21 diameter.Like this, the cross section that air-flow path is passed through by air flow inlet 21 to flow outlet 22 reduces gradually, and airspeed can be made slowly to change, thus reduces air-flow to the impact of sound-absorbing material; Meanwhile, the grading structure in cross section is less than the local resistance loss of mutation structure loss, effectively can increase the sound deadening capacity of medium, high frequency.Because air-flow flows into noise elimination expansion chamber 4 from the flow outlet 22 of sound absorption conical pipe 2, thus in can effectively increasing, the sound deadening capacity of low frequency.
Described sound absorption conical pipe 2 is sound-absorbing material making, as glass fibre cotton, polyurethane etc.; The wall thickness of sound absorption conical pipe 2 can require setting according to actual sound deadening capacity; Described encapsulant layer 3 can select the material that price is lower, as plastic foam material, can reduce cost of production like this.
Claims (2)
1. be applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination, comprise cylindrical shell (1), it is characterized in that: in described cylindrical shell (1), be provided with sound absorption conical pipe (2), between the inwall of outside to cylindrical shell (1) of sound absorption conical pipe (2), be provided with encapsulant layer (3); The flow outlet (22) of described sound absorption conical pipe (2) to cylindrical shell (1) outlet port along between be noise elimination expansion chamber (4); The air flow inlet (21) of described sound absorption conical pipe (2) to cylindrical shell (1) ingress port along between be air-flow direct current room (5).
2. the combined impedance silencing apparatus being applicable to middle and high, low frequency and eliminating the noise according to claim 1, it is characterized in that: described sound absorption conical pipe (2) is provided with 5, the wherein axis of 1 and the dead in line of cylindrical shell (1), other 4 symmetrical weeks of being distributed in cylindrical shell (1), the direction of 5 sound absorption conical pipes (2) is identical, and the diameter of flow outlet (22) is 1/3 of air flow inlet (21) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520194156.8U CN204663627U (en) | 2015-04-02 | 2015-04-02 | Be applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520194156.8U CN204663627U (en) | 2015-04-02 | 2015-04-02 | Be applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination |
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|---|---|
| CN204663627U true CN204663627U (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520194156.8U Expired - Fee Related CN204663627U (en) | 2015-04-02 | 2015-04-02 | Be applicable to combined impedance silencing apparatus that is middle and high, low frequency noise elimination |
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| CN (1) | CN204663627U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105620697A (en) * | 2016-01-22 | 2016-06-01 | 中国人民解放军海军工程大学 | Multilayer material combined cavity anechoic tile |
| CN106486108A (en) * | 2016-12-13 | 2017-03-08 | 长沙奥邦环保实业有限公司 | Vortex type silencer |
| CN106782485A (en) * | 2016-11-18 | 2017-05-31 | 宁德市银通发电设备有限公司 | A kind of impedance composite muffler |
| CN108005756A (en) * | 2017-12-31 | 2018-05-08 | 重庆固发机械制造有限责任公司 | A kind of muffler ASSY |
| CN109236753A (en) * | 2018-11-20 | 2019-01-18 | 攀枝花川特风机有限公司 | A kind of filter and sound damper |
| WO2022001831A1 (en) * | 2020-06-29 | 2022-01-06 | 中兴通讯股份有限公司 | Silencing unit, and honeycomb muffler |
-
2015
- 2015-04-02 CN CN201520194156.8U patent/CN204663627U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105620697A (en) * | 2016-01-22 | 2016-06-01 | 中国人民解放军海军工程大学 | Multilayer material combined cavity anechoic tile |
| CN106782485A (en) * | 2016-11-18 | 2017-05-31 | 宁德市银通发电设备有限公司 | A kind of impedance composite muffler |
| CN106782485B (en) * | 2016-11-18 | 2021-04-20 | 宁德市银通发电设备有限公司 | Impedance composite muffler |
| CN106486108A (en) * | 2016-12-13 | 2017-03-08 | 长沙奥邦环保实业有限公司 | Vortex type silencer |
| CN108005756A (en) * | 2017-12-31 | 2018-05-08 | 重庆固发机械制造有限责任公司 | A kind of muffler ASSY |
| CN109236753A (en) * | 2018-11-20 | 2019-01-18 | 攀枝花川特风机有限公司 | A kind of filter and sound damper |
| WO2022001831A1 (en) * | 2020-06-29 | 2022-01-06 | 中兴通讯股份有限公司 | Silencing unit, and honeycomb muffler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160402 |
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| CF01 | Termination of patent right due to non-payment of annual fee |