CN201943779U - Impedance compound silencer - Google Patents
Impedance compound silencer Download PDFInfo
- Publication number
- CN201943779U CN201943779U CN2011200796874U CN201120079687U CN201943779U CN 201943779 U CN201943779 U CN 201943779U CN 2011200796874 U CN2011200796874 U CN 2011200796874U CN 201120079687 U CN201120079687 U CN 201120079687U CN 201943779 U CN201943779 U CN 201943779U
- Authority
- CN
- China
- Prior art keywords
- cavity
- housing
- jet device
- silencing apparatus
- micropore jet
- 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 - Fee Related
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Abstract
The utility model discloses an impedance compound silencer, which comprises a casing (1). The casing (1) is a cavity structure with an inner wall provided with a sound absorption layer (2), a micropore injection device (3) and a throttling pressure-reducing device (4) are arranged inside a lower cavity of the casing (1), a cavity is formed between the casing (1) and the micropore injecting device (3) positioned in the middle of the casing (1), a cavity is formed between the micropore injecting device (3) and the throttling pressure-reducing device (4) arranged in the middle of the micropore injecting device (3), the low end of the throttling pressure-reducing device (4) is provided with an air inlet (5) communicated with the outside, an upper cavity of the casing (1) is provided with a tubular honeycomb sound absorber (6), the upper portion of the honeycomb sound absorber (6) is provided with an air outlet (7), and the lower portion of the honeycomb sound absorber (6) is provided with a cavernous shelf (8). The impedance compound silencer is compact in structure, can eliminate noises form low frequency to high frequency effectively, and is suitable for popularization and application.
Description
Technical field
The utility model 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, allowing passing through of air-flow, is 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 purpose of this utility model is the defective at prior art, and a kind of simple in structure, effective impedance complex formula silencing apparatus of eliminating the noise is provided.
The purpose of this utility model solves by the following technical programs:
A kind of impedance complex formula silencing apparatus, comprise housing, described housing is the cavity body structure that inwall is provided with absorbent treatment, be 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 described 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 described housing is provided with rainhat, and rainhat links to each other with housing by the support that is fixed on the housing top; The inside of described 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 described 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 described housing and the micropore jet device is provided with drain opening.
The utility model has following advantage compared to existing technology:
The utility model integrated use 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 utility model micropore jet device 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 utility model adopts has increased the area of contact of sound wave and sound-absorbing material, thereby has increased absorption.
The rainhat that the utility model top is provided with not only can be obtained certain sound deadening capacity, can make air-flow discharge smoothly in silencing apparatus again, reduces resistance.
The utility model is simple in structure, good muffling effect, suitable promoting the use of.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
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 utility model 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 that forms between housing 1 and micropore jet device 3 is provided with drain opening 14, micropore jet device 3 also is a cavity structure, is provided with the spray orifice 12 that the aperture is not more than 1.5mm on the cavity wall of micropore jet device 3; 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 by the support 10 that is fixed on housing 1 top; The inside of described rainhat 9 is provided with back taper sound absorbent 11.
During use, high pressure draught enters throttling dropping equipment 4 from suction port 5, when high pressure draught when the multilayer restricting orifice 13, the pressure jump emptying can be changed 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 by throttling dropping equipment 4 continues current from spray orifice 12, experiment shows, when being not more than 4mm, the aperture of spray orifice 12 has 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 utility model is not more than 1.5mm, therefore can eliminate the medium and low frequency noise significantly.After air communication is crossed spray orifice 12, enter 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 honeycomb sound absorbent 6 compositions that enter housing 1 top.After air-flow enters 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 utility model further strengthen.
The technology that the utility model does not relate to all can be realized by prior art.
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 described 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 described housing (1) is provided with rainhat (9), and rainhat (9) links to each other with housing (1) by the support (10) that is fixed on housing (1) top; The inside of described 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 described 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 described housing (1) and the micropore jet device (3) is provided with drain opening (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200796874U CN201943779U (en) | 2011-03-24 | 2011-03-24 | Impedance compound silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200796874U CN201943779U (en) | 2011-03-24 | 2011-03-24 | Impedance compound silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201943779U true CN201943779U (en) | 2011-08-24 |
Family
ID=44471128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200796874U Expired - Fee Related CN201943779U (en) | 2011-03-24 | 2011-03-24 | Impedance compound silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201943779U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606269A (en) * | 2012-04-16 | 2012-07-25 | 陈尔斌 | Impedance composite muffler |
| CN102691549A (en) * | 2011-03-24 | 2012-09-26 | 宜兴市川泽环境工程有限公司 | Impedance combined type silencer |
| CN102852594A (en) * | 2012-09-12 | 2013-01-02 | 昆山西马克动力机械有限公司 | Muffler |
| CN105469782A (en) * | 2015-12-19 | 2016-04-06 | 江西泰豪军工集团有限公司 | Powder metallurgy pipe diffusion silencer |
-
2011
- 2011-03-24 CN CN2011200796874U patent/CN201943779U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691549A (en) * | 2011-03-24 | 2012-09-26 | 宜兴市川泽环境工程有限公司 | Impedance combined type silencer |
| CN102606269A (en) * | 2012-04-16 | 2012-07-25 | 陈尔斌 | Impedance composite muffler |
| CN102606269B (en) * | 2012-04-16 | 2013-11-06 | 陈尔斌 | Impedance composite muffler |
| CN102852594A (en) * | 2012-09-12 | 2013-01-02 | 昆山西马克动力机械有限公司 | Muffler |
| CN105469782A (en) * | 2015-12-19 | 2016-04-06 | 江西泰豪军工集团有限公司 | Powder metallurgy pipe diffusion silencer |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20160324 |