CN202811011U - Main muffler with no sound-absorbing cotton - Google Patents
Main muffler with no sound-absorbing cotton Download PDFInfo
- Publication number
- CN202811011U CN202811011U CN 201220528921 CN201220528921U CN202811011U CN 202811011 U CN202811011 U CN 202811011U CN 201220528921 CN201220528921 CN 201220528921 CN 201220528921 U CN201220528921 U CN 201220528921U CN 202811011 U CN202811011 U CN 202811011U
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- cavity
- sound
- absorbing
- hush pipe
- hole
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- Expired - Fee Related
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Abstract
The utility model discloses a main muffler with no sound-absorbing cotton. The main muffler with no sound-absorbing cotton comprises a shell body, first sound-absorbing tubes and second sound-absorbing tubes, wherein the interior of the shell body is divided into a first cavity body, a second cavity body and a third cavity body. A plurality of first through holes are evenly distributed in the first sound-absorbing tube in the second cavity body, a plurality of second through holes are evenly distributed in the second sound-absorbing tube in the second cavity body, and a plurality of third through holes are evenly distributed in the second sound-absorbing tube in the third cavity body. The main muffler with no sound-absorbing cotton has the advantages that a resonant cavity is formed through sound-absorbing tubes and inner cavities in the shell body, low and medium frequency noise is effectively eliminated, no sound-absorbing cotton is needed, and the sound-absorbing effect is good.
Description
Technical field
The utility model relates to the automobile exhaust pipe technical field.
Background technique
Automobile is city main noise pollution sources, and the exhaust sound of motor is again the main source of automobile noise.Noise problem will be subject to more attention after emission problem at present, and the correlated noise mandatory standard was implemented already, and progressively strict trend is arranged.
The low frequency noise of motor car engine under rated speed is the most outstanding, and peak value was larger when frequency was 220Hz and 400Hz, and the whole high-frequency noise of motor is all very large, needs to adopt baffler to eliminate the noise.Consult Fig. 1, be main muffler structure common in the prior art, comprise the housing 1 that is provided with front cover 2 and rear end cover 3, be stratified and set on up and down the first hush pipe 4 and the second hush pipe 5 in the housing 1, be provided with in its middle shell 1 its inner chamber is separated into the first cavity 6, the front dividing plate 9 of the second cavity 7 and the 3rd cavity 8 and rear bulkhead 10, the inlet end 11 of the first hush pipe 4 and 1 outer connection of housing, exhaust end 12 passes front cover 2 in turn, extend in the 3rd cavity 8 behind front dividing plate 9 and the rear bulkhead 10, the inlet end 13 of the second hush pipe 5 is positioned at the first cavity 6, exhaust end 14 passes front dividing plate 9 in turn, behind rear bulkhead 10 and the rear end cover 3 with 1 outer connection of housing, in the first cavity 6 and the second cavity 7 in the first hush tube 4 be respectively equipped with through hole 15, the second hush pipe 5 in the second cavity 7 and the 3rd cavity 8 is provided with the second through hole 16, at the second through hole 16 outer laying acoustical cottons 17.Adopt the main baffler of this structure, its expansion cavity volume is not enough, and the utilization ratio of acoustical cotton is not high, causes noise reduction not good, and especially the low frequency noise reduction is bad, needs badly and is improved.
Summary of the invention
The purpose of this utility model provides a kind of main baffler without acoustical cotton that can effectively eliminate Middle and low frequency noise.
Technical solution of the present utility model is: a kind of main baffler without acoustical cotton, comprise that inside is separated into the housing of the first cavity, the second cavity and the 3rd cavity, the first hush pipe and the second hush pipe, evenly lay several through holes on described the first hush pipe in described the second cavity, evenly lay several second through holes on the second hush pipe in described the second cavity, evenly lay several third through-holes on the second hush pipe in described the 3rd cavity.
Evenly lay through hole and the second through hole on the first hush pipe in the second cavity and the second hush pipe, increased the percent opening on two hush pipes, be arranged on third through-hole in the 3rd cavity and further increased percent opening on the second hush pipe, thereby make the first hush pipe and the second hush pipe and the second cavity form resonant cavity, effectively eliminated Middle and low frequency noise.
The volume of described the second cavity accounts for 60% of described housing cavity volume.Further increased the volume of resonant cavity, better to the eradicating efficacy of Middle and low frequency noise.
The diameter of described through hole, the second through hole and third through-hole is 3.5mm.Jet frequency spectrum is moved towards high frequency direction, and reduction can be listened composition, reduces the injury to personnel.
The utility model has the advantages that: form resonant cavity by hush pipe and housing inner chamber, effectively eliminate Middle and low frequency noise, need not silencing cotton, soundproof effect is better.
Description of drawings
Accompanying drawing 1 is the structural representation of main baffler in the prior art;
Accompanying drawing 2 is the main muffler structure schematic representation among the utility model embodiment;
1, housing, 2, front cover, 3, rear end cover, 4, the first hush pipe, the 5, second hush pipe, the 6, first cavity, 7, the second cavity, the 8, the 3rd cavity, 9, front dividing plate, 10, rear bulkhead, 11, inlet end, 12, exhaust end, 13, inlet end, 14, exhaust end, 15, through hole, 16, the second through hole, 17, acoustical cotton, 18, third through-hole.
Embodiment
Embodiment:
Consult Fig. 2, a kind of main baffler without acoustical cotton, comprise the housing 1 that is provided with front cover 2 and rear end cover 3, be stratified and set on up and down the first hush pipe 4 and the second hush pipe 5 in the housing 1, be provided with in its middle shell 1 its inner chamber is separated into the first cavity 6, the front dividing plate 9 of the second cavity 7 and the 3rd cavity 8 and rear bulkhead 10, the inlet end 11 of the first hush pipe 4 and 1 outer connection of housing, exhaust end 12 passes front cover 2 in turn, extend in the 3rd cavity 8 behind front dividing plate 9 and the rear bulkhead 10, the inlet end 13 of the second hush pipe 5 is positioned at the first cavity 6, exhaust end 14 passes front dividing plate 9 in turn, behind rear bulkhead 10 and the rear end cover 3 with 1 outer connection of housing, evenly lay several through holes 15 on the first hush pipe 4 in the second cavity 7, evenly lay several second through holes 16 on the second hush pipe 5 in the second cavity 7, evenly lay several third through-holes 18 on the second hush pipe 5 in the 3rd cavity 8.
In the present embodiment, the volume of the second cavity 7 accounts for 60% of housing 1 cavity volume, the diameter of through hole 15, the second through hole 16 and third through-hole 18 is 3.5mm, and wherein through hole 15 quantity on the first hush pipe 4 are 260, and the quantity of the second through hole 16 on the second hush pipe 5 is 260.
Above-listed detailed description is specifying for one of the utility model possible embodiments, this embodiment limits claim of the present utility model, allly do not break away from the equivalence that the utility model does and implement or change, all should be contained in the claim of this case.
Claims (3)
1. main baffler without acoustical cotton, comprise that inside is separated into the housing of the first cavity, the second cavity and the 3rd cavity, the first hush pipe and the second hush pipe, it is characterized in that: evenly lay several through holes on described the first hush pipe in described the second cavity, evenly lay several second through holes on the second hush pipe in described the second cavity, evenly lay several third through-holes on the second hush pipe in described the 3rd cavity.
2. the main baffler without acoustical cotton according to claim 1, it is characterized in that: the volume of described the second cavity accounts for 60% of described housing cavity volume.
3. the main baffler without acoustical cotton according to claim 1 and 2, it is characterized in that: the diameter of described through hole, the second through hole and third through-hole is 3.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528921 CN202811011U (en) | 2012-10-16 | 2012-10-16 | Main muffler with no sound-absorbing cotton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528921 CN202811011U (en) | 2012-10-16 | 2012-10-16 | Main muffler with no sound-absorbing cotton |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202811011U true CN202811011U (en) | 2013-03-20 |
Family
ID=47869907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220528921 Expired - Fee Related CN202811011U (en) | 2012-10-16 | 2012-10-16 | Main muffler with no sound-absorbing cotton |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202811011U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003322A (en) * | 2015-07-24 | 2015-10-28 | 苏州鸿锦利气体设备有限公司 | Silencer of nitrogen making machine |
| CN112412576A (en) * | 2020-11-02 | 2021-02-26 | 柚皮(重庆)科技有限公司 | Silencer for vehicle noise, vibration and sound vibration roughness test |
-
2012
- 2012-10-16 CN CN 201220528921 patent/CN202811011U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003322A (en) * | 2015-07-24 | 2015-10-28 | 苏州鸿锦利气体设备有限公司 | Silencer of nitrogen making machine |
| CN112412576A (en) * | 2020-11-02 | 2021-02-26 | 柚皮(重庆)科技有限公司 | Silencer for vehicle noise, vibration and sound vibration roughness test |
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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: 20130320 Termination date: 20161016 |