CN102691549A - Impedance combined type silencer - Google Patents
Impedance combined type silencer Download PDFInfo
- Publication number
- CN102691549A CN102691549A CN2011100713838A CN201110071383A CN102691549A CN 102691549 A CN102691549 A CN 102691549A CN 2011100713838 A CN2011100713838 A CN 2011100713838A CN 201110071383 A CN201110071383 A CN 201110071383A CN 102691549 A CN102691549 A CN 102691549A
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- housing
- cavity
- jet device
- silencing apparatus
- micropore jet
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Abstract
The invention discloses an impedance combined type silencer comprising a shell (1), wherein the shell (1) is of a cavity structure with a sound absorption layer (2) on the inner wall; a cavity at the lower part of the shell (1) is internally provided with a small hole jetting device (3) and a throttle pressure reduction device (4); the small hole jetting device (3) is positioned in the middle of the shell (1) and one cavity is formed between the small hole jetting device (3) and shell (1); the throttle pressure reduction device (4) is positioned in the middle of the small hole jetting device (3) and one cavity is formed between the throttle pressure reduction device (4) and the small hole jetting device (3); the lower end of the throttle pressure reduction device (4) is provided with an air inlet (5) communicated with external; a cavity at the upper part of the shell (1) is internally provided with a tubular honeycomb type sound absorption body (6); the upper part of the sound absorption body (6) is provided with an air outlet (7); and the lower part of the sound absorption body (6) is provided with a pored shelf (8). The impedance combined type silencer is compact in structure and has an excellent silencing effect on low to high frequency noise, thus being suitable to popularization and use.
Description
Technical field
The present invention relates to a kind of silencing apparatus, a kind of specifically impedance complex formula silencing apparatus.
Background technique
Silencing apparatus is a kind of a kind of parts that stop sound transmission and allow air communication to cross; Be the important measures of eliminating air power noise; Silencing apparatus generally is installed on the air-flow path of aerodynamic force equipment or the device of the reduction noise in the inlet and exhaust system; And can stop the propagation of sound wave, allow passing through of air-flow, be the effective tool of control noise.A lot of single dissipative muffler or reactive mufflers are arranged in the market.Dissipative muffler is a sound absorption of utilizing muffler material or sound absorption structure, makes along the noise of pipe transmmision to decay with distance, thereby reaches the purpose of noise elimination, and this silencing apparatus has good noise elimination effect to high-frequency noise, but relatively poor to the low frequency acoustic attenuation performance; And reactive muffler; Be that unexpected expansion (or shrink) or side by means of pipeline section connects resonant cavity; Make along the sound wave of some frequency of pipe transmmision and reflect away to the source of students direction in sudden change place; Thereby reach the noise elimination purpose, it relatively is applicable to eliminates the Low Medium Frequency noise, and relatively poor to high-frequency noise noise elimination effect.So independent employing is resistive or reactive muffler can not reach desirable noise elimination effect, thereby environment is produced certain noise pollution.
Summary of the invention
The objective of the invention is defective, a kind of simple in structure, effective impedance complex formula silencing apparatus of eliminating the noise is provided to existing technology.
The objective of the invention is to solve through following technological scheme:
A kind of impedance complex formula silencing apparatus; Comprise housing; Described housing is the cavity body structure that inwall is provided with absorbent treatment, is provided with micropore jet device and throttling dropping equipment in the lower part of frame chamber, described micropore jet device the middle part of housing and and housing between form a cavity; Described throttling dropping equipment the middle part of micropore jet device and and the micropore jet device between form a cavity, the lower end of throttling dropping equipment is provided with the suction port that is in communication with the outside; Be provided with the honeycomb sound absorbent of tubulose in the upper chamber of said housing, the top of honeycomb sound absorbent is provided with the air outlet, and the bottom of honeycomb sound absorbent is provided with poroid shelf.
The top of said housing is provided with rainhat, and rainhat links to each other with housing through the support that is fixed on the housing top; The inside of said rainhat is provided with the back taper sound absorbent.
Described micropore jet device is a cavity structure, and the cavity wall of micropore jet device is provided with the spray orifice that the aperture is not more than 1.5mm.
Described throttling dropping equipment is a cavity structure, and the cavity wall of throttling dropping equipment is provided with restricting orifice.
The internal diameter of tube body of said honeycomb sound absorbent is identical with the pore size of dividing plate.
Be provided with absorbent treatment between the described honeycomb sound absorbent.
The cavity bottom that forms between said housing and the micropore jet device is provided with drain opening.
The present invention compares existing technology has following advantage:
Integrated use of the present invention throttling step-down noise elimination, micropore jet eliminate the noise and the resistance noise reduction principle, with triplicity, compact overall structure, the noise elimination scope is big, and the noise from the low frequency to the high frequency is all had good noise elimination effect.
Spray orifice diameter in the micropore jet device of the present invention is not more than 1.5mm, makes in the micropore jet stage, just can obtain the sound deadening capacity of 22.2dB.
The honeycomb sound absorbent that the present invention adopts has increased the area of contact of sound wave and sound-absorbing material, thereby has increased absorption.
The rainhat that top of the present invention is provided with not only can be obtained certain sound deadening capacity, can make air-flow in silencing apparatus, discharge smoothly again, reduces resistance.
The present invention is simple in structure, good muffling effect, suitable promoting the use of.
Description of drawings
Accompanying drawing 1 is the structural representation of invention.
Wherein: 1-housing; 2-absorbent treatment; 3-micropore jet device; 4-throttling dropping equipment; 5-suction port; 6-honeycomb sound absorbent; 7-air outlet; 8-dividing plate; 9-rainhat; 10-support; 11-back taper sound absorbent; 12-spray orifice; 13-restricting orifice; 14-drain opening.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
As shown in Figure 1: a kind of impedance complex formula silencing apparatus; Comprise housing 1; Housing 1 is provided with the cavity body structure of absorbent treatment 2 for inwall; In the lower chamber of housing 1, be provided with micropore jet device 3 and throttling dropping equipment 4, wherein micropore jet device 3 the middle part of housing 1 and and housing 1 between form a cavity, the cavity bottom of formation is provided with drain opening 14 between housing 1 and micropore jet device 3; Micropore jet device 3 also is a cavity structure, on the cavity wall of micropore jet device 3, is provided with the spray orifice 12 that the aperture is not more than 1.5mm; Throttling dropping equipment 4 the middle part of micropore jet device 3 and and micropore jet device 2 between form a cavity; Throttling dropping equipment 4 also is a cavity structure; The cavity wall of throttling dropping equipment 4 is provided with multilayer restricting orifice 13, and the lower end of throttling dropping equipment 4 is provided with the suction port 5 that is in communication with the outside.In the upper chamber of housing 1, also be provided with the honeycomb sound absorbent 6 of tubulose, be provided with absorbent treatment 2 between the honeycomb sound absorbent 6; The top of honeycomb sound absorbent 6 is provided with air outlet 7, and the bottom of honeycomb sound absorbent 6 is provided with poroid shelf 8, and the internal diameter of tube body of honeycomb sound absorbent 6 is identical with the pore size of dividing plate 8.Be provided with rainhat 9 at the top of housing 1 in addition, rainhat 9 links to each other with housing 1 through the support 10 that is fixed on housing 1 top; The inside of said rainhat 9 is provided with back taper sound absorbent 11.
During use; High pressure draught gets into throttling dropping equipments 4 from suction port 5, when high pressure draught during through multilayer restricting orifice 13, can change the pressure jump emptying into the pressure emptying again that lowers gradually; Make the airspeed in the baffler be controlled under the critical flow velocity unlikely generation shock wave noise; 3 suffered the staying of micropore jet device are pressed and are also reduced greatly after the throttling step-down simultaneously, make required wall thickness reduction.Air-flow through throttling dropping equipment 4 continues current from spray orifice 12; Experiment shows when the aperture of spray orifice 12 is not more than 4mm, to have the shift frequency effect, promptly since spray peak value and nozzle diameter be inversely proportional to; Therefore when nozzle diameter diminishes; The noise energy of spout radiation will be shifted to high frequency from low frequency, so low-frequency noise is lowered, high-frequency noise raises; The diameter of spray orifice 12 of the present invention is not more than 1.5mm, therefore can eliminate the medium and low frequency noise significantly.After air communication is crossed spray orifice 12; Get in the cavity of housing 1, because the inwall of housing 1 is provided with the absorbent treatment 2 that sound-absorbing material is made, therefore; Air-flow had just been eliminated the part high-frequency noise before resistive section of the honeycomb sound absorbent that gets into housing 1 top 6 compositions.After air-flow gets in the honeycomb sound absorbent 6 because honeycomb sound absorbent 6 and between the absorbent treatment 2 that is provided with increased the area of contact of sound wave and sound-absorbing material greatly, so can eliminate high-frequency noise significantly.In addition when through the air-flow of eliminating the noise from the air outlet 7 when discharging because the setting of rainhat 9, further eliminated remaining noise in the flow of process air, make noise elimination effect of the present invention further strengthen.
The technology that the present invention does not relate to all can realize through existing technology.
Claims (7)
1. impedance complex formula silencing apparatus; Comprise housing (1); It is characterized in that described housing (1) is provided with the cavity body structure of absorbent treatment (2) for inwall; Be provided with micropore jet device (3) and throttling dropping equipment (4) in the lower chamber of housing (1); Described micropore jet device (3) be positioned at housing (1) the middle part and and housing (1) between form a cavity, described throttling dropping equipment (4) be positioned at micropore jet device (3) the middle part and and micropore jet device (3) between form a cavity, the lower end of throttling dropping equipment (4) is provided with the suction port (5) that is in communication with the outside; Be provided with the honeycomb sound absorbent (6) of tubulose in the upper chamber of said housing (1), the top of honeycomb sound absorbent (6) is provided with air outlet (7), and the bottom of honeycomb sound absorbent (6) is provided with poroid shelf (8).
2. impedance complex formula silencing apparatus according to claim 1 is characterized in that the top of said housing (1) is provided with rainhat (9), and rainhat (9) links to each other with housing (1) through the support (10) that is fixed on housing (1) top; The inside of said rainhat (9) is provided with back taper sound absorbent (11).
3. impedance complex formula silencing apparatus according to claim 1 is characterized in that described micropore jet device (3) is a cavity structure, and the cavity wall of micropore jet device (3) is provided with the spray orifice (12) that the aperture is not more than 1.5mm.
4. impedance complex formula silencing apparatus according to claim 1 is characterized in that described throttling dropping equipment (4) is a cavity structure, and the cavity wall of throttling dropping equipment (4) is provided with restricting orifice (13).
5. impedance complex formula silencing apparatus according to claim 1 is characterized in that the internal diameter of tube body of said honeycomb sound absorbent (6) is identical with the pore size of dividing plate (8).
6. impedance complex formula silencing apparatus according to claim 1 is characterized in that being provided with between the described honeycomb sound absorbent (6) absorbent treatment (2).
7. impedance complex formula silencing apparatus according to claim 1 is characterized in that the cavity bottom that forms between said housing (1) and the micropore jet device (3) is provided with drain opening (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100713838A CN102691549A (en) | 2011-03-24 | 2011-03-24 | Impedance combined type silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100713838A CN102691549A (en) | 2011-03-24 | 2011-03-24 | Impedance combined type silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102691549A true CN102691549A (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100713838A Pending CN102691549A (en) | 2011-03-24 | 2011-03-24 | Impedance combined type silencer |
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| CN (1) | CN102691549A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987252A (en) * | 2015-02-10 | 2016-10-05 | 厦门嘉达声学技术有限公司 | Compound exhausting emptying silencer |
| CN106321194A (en) * | 2016-11-01 | 2017-01-11 | 四川三元环境治理股份有限公司 | Compound steam exhausting muffler |
| CN108561289A (en) * | 2018-03-06 | 2018-09-21 | 安徽朝祯环保科技有限公司 | A kind of exhaust silencer |
| CN109723926A (en) * | 2019-01-28 | 2019-05-07 | 西南石油大学 | A kind of combined type Gas Exhausting Muffle |
| CN109945005A (en) * | 2019-04-03 | 2019-06-28 | 西南石油大学 | A kind of gas air releasing silencer |
| CN113658574A (en) * | 2021-09-01 | 2021-11-16 | 江苏亚星波纹管有限公司 | Multifunctional environment-friendly energy-saving silencer |
| CN114459724A (en) * | 2022-04-14 | 2022-05-10 | 中国空气动力研究与发展中心高速空气动力研究所 | High-speed free jet wind tunnel noise control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2646393Y (en) * | 2003-08-27 | 2004-10-06 | 洛阳西苑车辆与动力检验所有限公司 | Four-chamber impedance composite type exhaust muffler of engine |
| CN2646392Y (en) * | 2003-08-27 | 2004-10-06 | 洛阳西苑车辆与动力检验所有限公司 | Tri-chamber impedance composite type exhaust muffler of engine |
| CN2668866Y (en) * | 2003-10-31 | 2005-01-05 | 哈尔滨工程大学 | Exhaust muffler for marine diesel engine |
| CN2685579Y (en) * | 2003-10-31 | 2005-03-16 | 哈尔滨工程大学 | Vertical double air-inlet exhaust sound-absorber for shipping diesel oil engine |
| CN201943779U (en) * | 2011-03-24 | 2011-08-24 | 宜兴市川泽环境工程有限公司 | Impedance compound silencer |
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2011
- 2011-03-24 CN CN2011100713838A patent/CN102691549A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2646393Y (en) * | 2003-08-27 | 2004-10-06 | 洛阳西苑车辆与动力检验所有限公司 | Four-chamber impedance composite type exhaust muffler of engine |
| CN2646392Y (en) * | 2003-08-27 | 2004-10-06 | 洛阳西苑车辆与动力检验所有限公司 | Tri-chamber impedance composite type exhaust muffler of engine |
| CN2668866Y (en) * | 2003-10-31 | 2005-01-05 | 哈尔滨工程大学 | Exhaust muffler for marine diesel engine |
| CN2685579Y (en) * | 2003-10-31 | 2005-03-16 | 哈尔滨工程大学 | Vertical double air-inlet exhaust sound-absorber for shipping diesel oil engine |
| CN201943779U (en) * | 2011-03-24 | 2011-08-24 | 宜兴市川泽环境工程有限公司 | Impedance compound silencer |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987252A (en) * | 2015-02-10 | 2016-10-05 | 厦门嘉达声学技术有限公司 | Compound exhausting emptying silencer |
| CN106321194A (en) * | 2016-11-01 | 2017-01-11 | 四川三元环境治理股份有限公司 | Compound steam exhausting muffler |
| CN108561289A (en) * | 2018-03-06 | 2018-09-21 | 安徽朝祯环保科技有限公司 | A kind of exhaust silencer |
| CN109723926A (en) * | 2019-01-28 | 2019-05-07 | 西南石油大学 | A kind of combined type Gas Exhausting Muffle |
| CN109945005A (en) * | 2019-04-03 | 2019-06-28 | 西南石油大学 | A kind of gas air releasing silencer |
| CN113658574A (en) * | 2021-09-01 | 2021-11-16 | 江苏亚星波纹管有限公司 | Multifunctional environment-friendly energy-saving silencer |
| CN114459724A (en) * | 2022-04-14 | 2022-05-10 | 中国空气动力研究与发展中心高速空气动力研究所 | High-speed free jet wind tunnel noise control device |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120926 |