CN204175364U - A kind of circular automobile exhaust gas Sound Attenuator - Google Patents
A kind of circular automobile exhaust gas Sound Attenuator Download PDFInfo
- Publication number
- CN204175364U CN204175364U CN201420560658.3U CN201420560658U CN204175364U CN 204175364 U CN204175364 U CN 204175364U CN 201420560658 U CN201420560658 U CN 201420560658U CN 204175364 U CN204175364 U CN 204175364U
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- dividing plate
- anger
- giving vent
- diffusing tube
- cylinder body
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Abstract
The utility model discloses a kind of circular automobile exhaust gas Sound Attenuator, it is characterized in that, front cover and rear end cover is occluding with respectively at the two ends of circular cylinder body, front dividing plate and rear bulkhead are by the internal layout of circular cylinder body, air inlet expanding duct is located at the top between front cover and front dividing plate, catalyst converter is located between front dividing plate and rear bulkhead, and the intermediate portion between rear end cover and rear bulkhead is provided with diffusing tube of giving vent to anger, between the outer wall and the inwall of circular cylinder body of diffusing tube of giving vent to anger, be filled with glass fibre.By above setting, the utility model maintains the effective advantage of centering, low frequency silencing noise, and air-flow is by repeatedly turning to the noise elimination to high frequency, engine supercharger whistle is well eliminated, low-frequency noise is well solved, and diffusing tube pipe of giving vent to anger adopts straight tube structure, also eliminate a part of exhaust sound while the exhaust back pressure of whole system is reduced, in actual entrucking uses, obtain good effect.
Description
Technical field
The utility model belongs to a kind of engine exhaust Sound Attenuator, particularly relates to a kind of for reducing engine exhaust noise and the circular automobile exhaust gas Sound Attenuator reducing whole system exhaust back pressure.
Background technique
At present, existing engine exhaust Sound Attenuator mainly adopts the resistance exhaust silencer structure of pipeline section expansion and cross-sectional constriction, utilize sound wave in the change of abrupt change of cross-section place due to acoustic reactance, be directed at a part of sound wave and go back to sound source reflects, thus reach the object of noise elimination.The low-frequency silencing noise of this resistance exhaust noise silencing case centering has certain effect.Due to the perforation pipeline section good to high frequency noise soundproof effect of employing and the negligible amounts of perforated plate, and the inner resistive sound-absorbing material that layout is not good to high frequency noise acoustically effective, it is undesirable to the soundproof effect of high frequency noise, and the relatively unreasonable exhaust back pressure that causes of structural design is higher.
Model utility content
The purpose of this utility model is to provide a kind of in whole frequency range, the impedance composite automobile exhaust gas Sound Attenuator that especially low-frequency range soundproof effect is good.
To achieve these goals, the utility model is occluding with front cover and rear end cover respectively at the two ends of circular cylinder body, front dividing plate and rear bulkhead are by the internal layout of circular cylinder body, multiple round vent is provided with in the bottom of described front dividing plate, the intermediate portion of dividing plate is provided with diffusing tube mounting hole of giving vent to anger in the rear, multiple long strip vent is located at the surrounding of diffusing tube mounting hole of giving vent to anger, air inlet expanding duct is located at the top between front cover and front dividing plate, the outer end opening of described air inlet expanding duct, the other end is closed by front dividing plate, catalyst converter is located between front dividing plate and rear bulkhead, intermediate portion between rear end cover and rear bulkhead is provided with diffusing tube of giving vent to anger, the outer end opening of described diffusing tube of giving vent to anger, the other end is closed, glass fibre is filled with between the outer wall and the inwall of circular cylinder body of diffusing tube of giving vent to anger.
By above setting, the utility model maintains the effective advantage of centering, low frequency silencing noise, and air-flow is by repeatedly turning to the noise elimination to high frequency, engine supercharger whistle is well eliminated, low-frequency noise is well solved, and diffusing tube pipe of giving vent to anger adopts straight tube structure, also eliminate a part of exhaust sound while the exhaust back pressure of whole system is reduced, in actual entrucking uses, obtain good effect.
Accompanying drawing explanation
Now by reference to the accompanying drawings the utility model is described further.
Fig. 1 is the utility model structural representation.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
In figure: 1, circular cylinder body, 2, front cover, 3, rear end cover, 4, front dividing plate, 5, rear bulkhead, 6, round vent, 7, diffusing tube mounting hole of giving vent to anger, 8, long strip vent, 9, catalyst converter, 10, diffusing tube of giving vent to anger, 11, glass fibre, 12, air inlet expanding duct.
Embodiment
As Fig. 1, 2, shown in 3, the utility model is occluding with front cover 2 and rear end cover 3 respectively at the two ends of circular cylinder body 1, front dividing plate 4 and rear bulkhead 5 are by the internal layout of circular cylinder body 1, multiple round vent 6 is provided with in the bottom of described front dividing plate 4, the intermediate portion of dividing plate 5 is provided with diffusing tube mounting hole 7 of giving vent to anger in the rear, multiple long strip vent 8 is located at the surrounding of diffusing tube mounting hole 7 of giving vent to anger, air inlet expanding duct 12 is located at the top between front cover 2 and front dividing plate 4, the outer end opening of described air inlet expanding duct 12, the other end is closed by front dividing plate 4, catalyst converter 9 is located between front dividing plate 4 and rear bulkhead 5, intermediate portion between rear end cover 3 and rear bulkhead 5 is provided with diffusing tube 10 of giving vent to anger, the outer end opening of described diffusing tube 10 of giving vent to anger, the other end is closed, glass fibre 11 is filled with between the outer wall and the inwall of circular cylinder body 1 of diffusing tube 10 of giving vent to anger.By above setting, from engine exhaust pipe discharge noise enter air inlet expanding duct 12 of the present utility model, through the iris action of air inlet expanding duct 12 and front dividing plate 4, by the vent on air inlet expanding duct 12, realize one-level expansion, eliminate the basic, normal, high audio-frequency noise of part, the transformation in noise direction simultaneously and the vibration friction at little vent, eliminate part high-frequency noise.The round vent 6 of noise more in the past on dividing plate 4 enters catalyst converter 9, realize second level expansion, eliminate that part is low, mid-frequency noise again, noise enters in glass fibre 11 from the long strip vent 8 of catalyst converter 9 through rear bulkhead 5 again, realize three grades of expansions, eliminate the basic, normal, high audio-frequency noise of part again, the aperture of last noise on diffusing tube 10 of giving vent to anger enters diffusing tube 10 of giving vent to anger and discharges.
Claims (1)
1. a circular automobile exhaust gas Sound Attenuator, it is characterized in that: be occluding with front cover and rear end cover respectively at the two ends of circular cylinder body, front dividing plate and rear bulkhead are by the internal layout of circular cylinder body, multiple round vent is provided with in the bottom of described front dividing plate, the intermediate portion of dividing plate is provided with diffusing tube mounting hole of giving vent to anger in the rear, multiple long strip vent is located at the surrounding of diffusing tube mounting hole of giving vent to anger, air inlet expanding duct is located at the top between front cover and front dividing plate, the outer end opening of described air inlet expanding duct, the other end is closed by front dividing plate, catalyst converter is located between front dividing plate and rear bulkhead, intermediate portion between rear end cover and rear bulkhead is provided with diffusing tube of giving vent to anger, the outer end opening of described diffusing tube of giving vent to anger, the other end is closed, glass fibre is filled with between the outer wall and the inwall of circular cylinder body of diffusing tube of giving vent to anger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420560658.3U CN204175364U (en) | 2014-09-27 | 2014-09-27 | A kind of circular automobile exhaust gas Sound Attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420560658.3U CN204175364U (en) | 2014-09-27 | 2014-09-27 | A kind of circular automobile exhaust gas Sound Attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204175364U true CN204175364U (en) | 2015-02-25 |
Family
ID=52564181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420560658.3U Active CN204175364U (en) | 2014-09-27 | 2014-09-27 | A kind of circular automobile exhaust gas Sound Attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204175364U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492125A (en) * | 2017-12-19 | 2020-08-04 | 本田技研工业株式会社 | Muffler device |
-
2014
- 2014-09-27 CN CN201420560658.3U patent/CN204175364U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492125A (en) * | 2017-12-19 | 2020-08-04 | 本田技研工业株式会社 | Muffler device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170401 Address after: 262200 Shandong City, Weifang Province Zhucheng Lishan Road, No. 11 Patentee after: Shandong aytek environmental Polytron Technologies Inc Address before: 262200 Shandong city of Weifang Province Zhucheng Longdu City Industrial Park Patentee before: Zhucheng Haidewei Machine Co., Ltd. |