CN202866947U - Main silencer of automobile exhaust pipe - Google Patents
Main silencer of automobile exhaust pipe Download PDFInfo
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- CN202866947U CN202866947U CN 201220528825 CN201220528825U CN202866947U CN 202866947 U CN202866947 U CN 202866947U CN 201220528825 CN201220528825 CN 201220528825 CN 201220528825 U CN201220528825 U CN 201220528825U CN 202866947 U CN202866947 U CN 202866947U
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Abstract
The utility model discloses a main silencer of an automobile exhaust pipe. The main silencer of the automobile exhaust pipe comprises a first silencer pipe and a second silencer pipe, wherein the first silencer pipe and the second silencer pipe are respectively provided with gas inlet ends and gas exhaust ends. Along the direction from the gas inlet ends to the gas exhaust ends, the first silencer pipe is divided into a first chamber section, a second chamber section and a third chamber section in sequence, and the second silencer pipe is divided into a first chamber portion, a second chamber portion and a third chamber portion in sequence. Two elliptical holes are formed in the first chamber section, a first through hole area is arranged on the front half section of the second chamber section, and the length of the first through hole area is one third of that of the second chamber section. Six circular holes are formed in the front half section of the second chamber portion, and a second through hole area is arranged on the rear half section of the second chamber portion, wherein the length of the second through hole area is one second of that of the second chamber portion, and a third through hole area is arranged on the front half section of the third chamber portion, wherein the length of the third through hole area is two thirds of that of the third chamber portion. The main silencer of the automobile exhaust pipe improves the inserting loss of an exhaust system, effectively enlarges the volume of an expansion chamber, improves the using ratio of sound-absorbing cotton, and effectively reduces low and medium frequency noise and high-frequency noise.
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 insertion loss is little, 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 insertion loss greatly and the main baffler of the automobile exhaust pipe that the Middle and low frequency noise eradicating efficacy is good.
Technical solution of the present utility model is: a kind of main baffler of automobile exhaust pipe, comprise the first hush pipe and the second hush pipe that have respectively inlet end and exhaust end, along inlet end to the exhaust end direction, the first hush pipe is divided into the first cavity section in turn, the second cavity section and the 3rd cavity section, the second hush pipe is divided into the first cavity section in turn, the second cavity section and the 3rd cavity section, be provided with two elliptical apertures in described the first cavity section, be provided with the first through hole area of 1/3 that length accounts for the second cavity segment length in the first half section of the second cavity section, first half section in the second cavity section is provided with six circular holes, second half section is provided with the second through hole area of 1/2 that length accounts for the second chamber body length, is provided with 2/3 the third through-hole district that length accounts for the 3rd chamber body length in the first half section of the 3rd cavity section.
The negligible amounts of elliptical aperture and circular hole, can increase the insertion loss of the first cavity section and the second cavity section, improve exhaust resistance, the first through hole area, the second through hole area and the third through-hole district that increase can increase the expansion cavity volume, effectively reduce Middle and low frequency noise, improve on the whole the eradicating efficacy of low-frequency noise.
Outside described the second through hole area and third through-hole district, fill acoustical cotton.Effectively the absorbing high-frequency noise further improves the noise reduction of exhaust.
The through hole that to be provided with 128 diameters in described the first through hole area be 3.5mm.In described the second through hole area and third through-hole district, supply to be provided with the second through hole that 336 diameters are 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: improved the insertion loss of vent systems, effectively increased the expansion cavity volume, improved the utilization ratio of acoustical cotton, effectively reduced Middle and low frequency noise and high-frequency noise.
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 diagram among the utility model embodiment;
1, housing, 2, front cover, 3, rear end cover, 4, the first hush pipe, 41, the first cavity section, 42, the second cavity section, 43, the 3rd cavity section, 5, the second hush pipe, 51, the first cavity section, 52, the second cavity section, 53, the 3rd cavity section, 6, the first cavity, 7, the second cavity, 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, elliptical aperture, 19, circular hole, 20, the first through hole area, 21, the second through hole area, 22, the third through-hole district.
Embodiment
Embodiment:
Consult Fig. 2, main baffler for a kind of automobile exhaust pipe, comprise the housing 1 that is provided with front cover 2 and rear end cover 3, be stratified and set on the first hush pipe 4 and the second hush pipe 5 in the housing 1 up and down, be provided with the front dividing plate 9 and the rear bulkhead 10 that its inner chamber are separated into the first cavity 6, the second cavity 7 and the 3rd cavity 8 in its middle shell 1.The inlet end 11 of the first hush pipe 4 and 1 outer connection of housing, exhaust end 12 is positioned at the 3rd cavity 8,12 directions along inlet end 11 to exhaust end, the first hush pipe 4 is divided into the first cavity section 41, the second cavity section 42 and the 3rd cavity section 43 in turn.The inlet end 13 of the second hush pipe 5 is positioned at the first cavity 6, exhaust end 14 and 1 outer connection of housing, and 14 directions along inlet end 13 to exhaust end, the second hush pipe 5 is divided into the first cavity section 51, the second cavity section 52 and the 3rd cavity section 53.Be provided with two elliptical apertures 18 in the first cavity section 41, be provided with the first through hole area 20 of 1/3 that length accounts for the second cavity section 42 length in the first half section of the second cavity section 42, first half section in the second cavity section 52 is provided with six circular holes 19, second half section is provided with the second through hole area 21 of 1/2 that length accounts for the second cavity section 52 length, is provided with 2/3 the third through-hole district 22 that length accounts for the 3rd cavity section 53 length in the first half section of the 3rd cavity section 53.At the second through hole area 21 and third through-hole district 22 outer filling acoustical cottons 17.
In the present embodiment, the through hole 15 that to be provided with 128 diameters in the first through hole area 20 be 3.5mm.Be provided with the second through hole 16 that 336 diameters are 3.5mm at the second through hole area 21 and the 22 interior confessions of third through-hole district.
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 (4)
1. the main baffler of an automobile exhaust pipe, comprise the first hush pipe and the second hush pipe that have respectively inlet end and exhaust end, along inlet end to the exhaust end direction, the first hush pipe is divided into the first cavity section in turn, the second cavity section and the 3rd cavity section, the second hush pipe is divided into the first cavity section in turn, the second cavity section and the 3rd cavity section, it is characterized in that: be provided with two elliptical apertures in described the first cavity section, be provided with the first through hole area of 1/3 that length accounts for the second cavity segment length in the first half section of the second cavity section, first half section in the second cavity section is provided with six circular holes, second half section is provided with the second through hole area of 1/2 that length accounts for the second chamber body length, is provided with 2/3 the third through-hole district that length accounts for the 3rd chamber body length in the first half section of the 3rd cavity section.
2. the main baffler of a kind of automobile exhaust pipe according to claim 1 is characterized in that: fill acoustical cotton outside described the second through hole area and third through-hole district.
3. the main baffler of a kind of automobile exhaust pipe according to claim 1 and 2 is characterized in that: the through hole that to be provided with 128 diameters in described the first through hole area be 3.5mm.
4. the main baffler of a kind of automobile exhaust pipe according to claim 1 and 2 is characterized in that: be provided with altogether the second through hole that 336 diameters are 3.5mm in described the second through hole area and third through-hole district.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528825 CN202866947U (en) | 2012-10-16 | 2012-10-16 | Main silencer of automobile exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528825 CN202866947U (en) | 2012-10-16 | 2012-10-16 | Main silencer of automobile exhaust pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202866947U true CN202866947U (en) | 2013-04-10 |
Family
ID=48033671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220528825 Expired - Fee Related CN202866947U (en) | 2012-10-16 | 2012-10-16 | Main silencer of automobile exhaust pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202866947U (en) |
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2012
- 2012-10-16 CN CN 201220528825 patent/CN202866947U/en not_active Expired - Fee Related
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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: 20130410 Termination date: 20161016 |
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| CF01 | Termination of patent right due to non-payment of annual fee |