CN2436655Y - Wide-frequency multi-section silencer - Google Patents
Wide-frequency multi-section silencer Download PDFInfo
- Publication number
- CN2436655Y CN2436655Y CN 00229169 CN00229169U CN2436655Y CN 2436655 Y CN2436655 Y CN 2436655Y CN 00229169 CN00229169 CN 00229169 CN 00229169 U CN00229169 U CN 00229169U CN 2436655 Y CN2436655 Y CN 2436655Y
- Authority
- CN
- China
- Prior art keywords
- expansion chamber
- length
- frequency
- interpolation
- interpolation pipe
- 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
Links
Images
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
The utility model relates to a wide-frequency multi-section silencer which comprises orderly arranged a series of expansion chambers, wherein, the first expansion chamber is communicated with a sound source by using inner inserted pipes; all the sections of expansion chambers are connected by using the inner inserted pipes. In order to improve the silencing effect of low-frequency noise and widen the range of silencing frequency, micropore layers are arranged among the casings of the expansion chambers and the inner inserted pipes. The utility model has the advantages of wide silencing frequency, small resistant consumption, good aerodynamic characteristics, etc.
Description
The utility model relates to a kind of wideband more piece silencing apparatus, is applicable to the air-flow or the exhausting silencer of industries such as chemical industry, metallurgy, electric power.
The 220th～221 page of " noise control theory " book that BJ Universithy of Polytech Press publishes in 8 moonlights of nineteen ninety discloses a kind of more piece resistance energy silencing apparatus, its objective is in order to eliminate the existing many frequencies of passing through of single-stage silencing apparatus, promptly the frequency of noise elimination of back one joint expansion chamber just last joint pass through frequency, its formation comprises: a series of expansion chamber of Bu Zhiing successively, the 1st expansion chamber is led to sound source with interpolation pipe, and each saves between the expansion chamber and links with interpolation pipe.Problem is: the frequency of noise elimination scope is narrower, is difficult to eliminate middle and high audio-frequency noise.
The purpose of this utility model is to provide a kind of wideband more piece silencing apparatus, and it can widen the frequency of noise elimination scope on the basis of the noise elimination effect of improving low-frequency noise.
The technological scheme that realizes the utility model purpose is when comprising aforementioned formation, and its improvements are to be provided with microporous layers between expansion chamber housing and interpolation pipe, the length L of the 1st expansion chamber
1Length L for 1/4, the 2 expansion chamber of wavelength X
2Be L
1The length L of the/2, the 3rd expansion chamber
3Be L
2/ 2, the length L of n expansion chamber
nBe L
N-1/ 2, the interpolation length of each expansion chamber interpolation pipe entry end is L
n/ 2, the interpolation length of outlet end is L
n/ 4.
And, the punching rate of microporous layers can for this aspect long-pending 1～2.5%, the aperture is 0.8～1.2mm.
And interpolation pipe can be distributed with aperture, and the aperture is 9～14mm, and punching rate is 28～35% of perforation pipeline section area.
And the end that saves expansion chamber at n can be connected with a micro silencer device.
In this formation, owing between expansion chamber housing and interpolation pipe, be provided with microporous layers, by resistance and microperforated panel noise-cancelling theory as can be known, this composite structure can not only further improve the noise elimination effect of low-frequency noise, and centering, high-frequency noise also have good noise elimination effect.The results showed that this silencing apparatus has frequency of noise elimination, and wide (63～8000HZ), resistance is decreased little and had good noise elimination and aerodynamic characteristics.
The utility model is described in further detail below with reference to accompanying drawing.
Fig. 1 is the integrally-built sectional view of signal the utility model.
Fig. 2 is the cross-sectional view along Figure 1A-A place.
Fig. 3 is that enlarged view is launched in the part of microporous layers.
See figures.1.and.2, this silencing apparatus comprises that a series of expansion chamber 2, the first expansion chamber 2 of layout are led to sound source with interpolation pipe 1 successively, and each saves between the expansion chamber 2 and links with interpolation pipe 1.
Theoretically, can be provided with a series of expansion chamber 2, but, after having measured the relevant physical parameter of noise, 2～6 joints can be set generally according to engineering practice.
In order to improve the noise elimination effect of low-frequency noise and to widen the frequency of noise elimination scope, between expansion chamber 2 housings 3 and interpolation pipe 4, be provided with microporous layers 5 (see figure 3)s, promptly be to have in the joint expansion chamber 2 to be provided with microporous layers 5 at least, and 1 or 2 layer of microporous layers 5 can be arranged.
The punching rate of described microporous layers 5 can for this aspect long-pending 1～2.5%, the aperture is 0.8～1.2mm.
The part that interpolation pipe 1 is positioned at expansion chamber 2 can be distributed with aperture 4, and the aperture is 9～14mm, and punching rate is 28～35% of perforation pipeline section area.Described perforation pipeline section can be the total length that interpolation pipe 1 is positioned at expansion chamber 2, also can be the part of total length.
In order to make each joint expansion chamber 2 have the frequency of noise elimination of maximum and the frequency of passing through that this frequency just in time is last joint expansion chamber 2, suggestion: the length L of the 1st expansion chamber 2
1Length L for 1/4, the 2 expansion chamber 2 of wavelength X
2Be L
1The length L of the/2, the 3rd expansion chamber 2
3Be L
2/ 2, the length of n expansion chamber 2 is L
N-1/ 2, the interpolation length of each expansion chamber 2 interpolation pipes 1 entry end 8 is L
n/ 2, the interpolation length of outlet end 9 is L
n/ 4.
In order to strengthen noise elimination effect, and eliminate middle and high audio-frequency noise, can connect a micro silencer device 6 at the end of n joint expansion chamber 2 to low-frequency noise.This device has shell 10 and microporous layers 7, and the punching rate of microporous layers 7 and aperture and can be provided with 1 or 2 layer of microporous layers 7 as hereinbefore.
Claims (4)
1, a kind of wideband more piece silencing apparatus, comprise: a series of expansion chamber [2] of Bu Zhiing successively, the 1st expansion chamber [2] is led to sound source with interpolation pipe [1], each saves between the expansion chamber [2] and links with interpolation pipe [1], it is characterized in that: between expansion chamber [2] housing [3] and interpolation pipe [1], be provided with microporous layers [5], the length L of the 1st expansion chamber [2]
11/4, the 2 expansion chamber [2] and length L for wavelength X
2Be L
1The length L of the/2, the 3rd expansion chamber [2]
3Be L
2/ 2, n expansion chamber [2] and length L
nBe L
N-1/ 2, the interpolation length of each expansion chamber [2] interpolation pipe [1] entry end [8] is L
n/ 2, the interpolation length of outlet end [9] is L
n/ 4.
2, silencing apparatus according to claim 1 is characterized in that: the punching rate of microporous layers [5] is 0.8～1.2mm for 1～2.5% long-pending aperture of this aspect.
3, silencing apparatus according to claim 2 is characterized in that: interpolation pipe [1] is distributed with aperture [4], and the aperture is 9～14mm, and punching rate is 28～35% of perforation pipeline section area.
4, silencing apparatus according to claim 1 is characterized in that: the end in n joint expansion chamber [2] is connected with a micro silencer device [6].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00229169 CN2436655Y (en) | 2000-01-28 | 2000-01-28 | Wide-frequency multi-section silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00229169 CN2436655Y (en) | 2000-01-28 | 2000-01-28 | Wide-frequency multi-section silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2436655Y true CN2436655Y (en) | 2001-06-27 |
Family
ID=33592517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00229169 Expired - Lifetime CN2436655Y (en) | 2000-01-28 | 2000-01-28 | Wide-frequency multi-section silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2436655Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230408A (en) * | 2011-06-27 | 2011-11-02 | 胡洪霞 | Mixed silencer |
| CN102575539A (en) * | 2009-09-24 | 2012-07-11 | 丰田自动车株式会社 | Exhaust pipe part and exhaust device for internal combustion engine |
| CN103104559A (en) * | 2011-11-14 | 2013-05-15 | 湖北双剑鼓风机制造有限公司 | Blowing self-cleaning type micropore silencer |
-
2000
- 2000-01-28 CN CN 00229169 patent/CN2436655Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575539A (en) * | 2009-09-24 | 2012-07-11 | 丰田自动车株式会社 | Exhaust pipe part and exhaust device for internal combustion engine |
| CN102575539B (en) * | 2009-09-24 | 2014-12-31 | 丰田自动车株式会社 | Exhaust pipe part and exhaust device for internal combustion engine |
| CN102230408A (en) * | 2011-06-27 | 2011-11-02 | 胡洪霞 | Mixed silencer |
| CN103104559A (en) * | 2011-11-14 | 2013-05-15 | 湖北双剑鼓风机制造有限公司 | Blowing self-cleaning type micropore silencer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204165212U (en) | A kind of multisection type full rate section air conditioner muffler | |
| CN2436655Y (en) | Wide-frequency multi-section silencer | |
| CA2267628A1 (en) | Gas flow silencer | |
| CN105509292A (en) | Active ventilation muffler | |
| CN107120165B (en) | Double exhaust pipe muffler | |
| CN113153817A (en) | Ventilating duct comprehensive noise reduction and elimination structure | |
| WO2005056151A3 (en) | Bacteriostatic fluid filter | |
| CN204716335U (en) | A kind of silencing apparatus for the exhaust of small displacement compact type | |
| CN2406094Y (en) | Silencing valute for micro-hole cavity | |
| CN201916202U (en) | Compressor muffler device and compressor having same | |
| CN210919234U (en) | Vehicle silencer | |
| CN201502421U (en) | Anti-noise structure for motor of diesel generator | |
| CN2531110Y (en) | Impedance composite exhaust silencer for engine | |
| CN201461033U (en) | Special air exhaust silencer for eliminating high-frequency whistle of engine | |
| CN201232578Y (en) | Engine silencer front noise deadener for automobile engine | |
| CN107100825A (en) | A kind of Multistage muffler | |
| CN2668863Y (en) | Gas or steam dispersion special-efficient silencer | |
| CN204646365U (en) | A kind of multistage impedance composite muffler | |
| CN212360340U (en) | Noise elimination structure and ventilation silencer | |
| CN208225505U (en) | A kind of micro- punching plate benging silencer | |
| CN2523957Y (en) | Four chamber exhaust silencer of engine | |
| CN2816367Y (en) | IC engine exhausting silencer for automobile | |
| CN200978813Y (en) | Cross flow fan for air conditioner | |
| CN207132482U (en) | A kind of silencer of decomposable asymmetric choice net ozone gas | |
| CN2682211Y (en) | Silencer for perforated pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20010627 |
|
| DD01 | Delivery of document by public notice |
Addressee: Wang Fayuan Document name: Notification of Expiration of Patent Right Duration |