CN203130215U - Sound attenuation tube of auxiliary muffler - Google Patents
Sound attenuation tube of auxiliary muffler Download PDFInfo
- Publication number
- CN203130215U CN203130215U CN 201320071625 CN201320071625U CN203130215U CN 203130215 U CN203130215 U CN 203130215U CN 201320071625 CN201320071625 CN 201320071625 CN 201320071625 U CN201320071625 U CN 201320071625U CN 203130215 U CN203130215 U CN 203130215U
- Authority
- CN
- China
- Prior art keywords
- sound attenuation
- noise
- auxiliary muffler
- tube
- attenuation tube
- 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 a sound attenuation tube of an auxiliary muffler. The sound attenuation tube comprises sound attenuation holes arranged in a shell. The sound attenuation holes are long-bar-shaped holes. The sound attenuation tube of the auxiliary muffler has the advantages of being simple in structure, stable in airflow, not capable of producing agitation, reduced in turbulence noise and better in noise reducing effect.
Description
Technical field
The novel automobile exhaust system technical field that relates to of this adaptation especially relates to secondary acoustic wave filter structure.
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 subjected 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 bigger when frequency was 220Hz and 400Hz, and the whole high-frequency noise of motor is all very big, needs to adopt baffler to eliminate the noise.Consult Fig. 1, be a kind of unfolded drawing of secondary silencing apparatus hush pipe, be evenly distributed with circular sound attenuation hole 2 at hush tube housing 1, by sound attenuation hole 2 exhaust is sprayed in hush tube 1, jet frequency spectrum moves towards high frequency direction, and reduction can be listened composition, reduces the injury to personnel.But adopt this structure, the easy disorder of air-flow is agitated, and causes turbulence noise, and noise reduction is limited.
Summary of the invention
The purpose of this utility model provide a kind of can steady air flow and the hush tube of the secondary silencing apparatus of excellent noise reduction effect.
Technical solution of the present utility model is: a kind of hush tube of secondary silencing apparatus, comprise the sound attenuation hole that is arranged on the housing, and described sound attenuation hole is the long strip hole.
The shape of sound attenuation hole changes long strip into by circle, and under the identical situation of perforated area, the length that has prolonged opening area is equivalent to the expanssion type silencing apparatus, air-flow can not produced agitate, thereby reduce turbulence noise, effectively raises the effect of noise reduction.
The punching rate of described housing is 37.1%.Adopt this punching rate can increase the expansion cavity volume, be conducive to increase the noise elimination bandwidth, effectively reduce the medium and low frequency noise.
The utility model has the advantages that: simple in structure, air-flow is steady, can not produce and agitate, and turbulence noise reduces, and noise reduction is better.
Description of drawings
Accompanying drawing 1 is the unfolded drawing of hush tube in the prior art;
Accompanying drawing 2 is the unfolded drawing of hush tube among the utility model embodiment;
1, housing, 2, sound attenuation hole.
Embodiment
Embodiment:
Consult Fig. 2, be a kind of hush tube unfolded drawing of secondary silencing apparatus, it comprises housing 1 and sound attenuation hole 2, and wherein sound attenuation hole 2 is the long strip hole, and the punching rate of housing 1 is 37.1%.
In the present embodiment, sound attenuation hole 2 is offered 160 altogether, is equivalent to the expanssion type silencing apparatus, on the housing 1 not the aperture portion branch be equivalent to insert pipe, be conducive to increase the noise elimination bandwidth and reduce and agitate generation, thereby reduce turbulence noise, noise reduction is better.
Above-listed detailed description is specifying at one of the utility model possible embodiments, this embodiment is not in order to limit 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 (2)
1. the hush tube of a secondary silencing apparatus comprises the sound attenuation hole that is arranged on the housing, it is characterized in that: described sound attenuation hole is the long strip hole.
2. the hush tube of a kind of secondary silencing apparatus according to claim 1, it is characterized in that: the punching rate of described housing is 37.1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071625 CN203130215U (en) | 2012-10-16 | 2013-02-16 | Sound attenuation tube of auxiliary muffler |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220529232.2 | 2012-10-16 | ||
| CN201220529232 | 2012-10-16 | ||
| CN 201320071625 CN203130215U (en) | 2012-10-16 | 2013-02-16 | Sound attenuation tube of auxiliary muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203130215U true CN203130215U (en) | 2013-08-14 |
Family
ID=48938205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320071625 Expired - Fee Related CN203130215U (en) | 2012-10-16 | 2013-02-16 | Sound attenuation tube of auxiliary muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203130215U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402005A (en) * | 2015-12-18 | 2016-03-16 | 力帆实业(集团)股份有限公司 | Gas exhausting system and pre-muffler thereof |
-
2013
- 2013-02-16 CN CN 201320071625 patent/CN203130215U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402005A (en) * | 2015-12-18 | 2016-03-16 | 力帆实业(集团)股份有限公司 | Gas exhausting system and pre-muffler thereof |
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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: 20130814 Termination date: 20170216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |