CN201865724U - Sound damping device for air exhaust of automobile - Google Patents
Sound damping device for air exhaust of automobile Download PDFInfo
- Publication number
- CN201865724U CN201865724U CN2010206332436U CN201020633243U CN201865724U CN 201865724 U CN201865724 U CN 201865724U CN 2010206332436 U CN2010206332436 U CN 2010206332436U CN 201020633243 U CN201020633243 U CN 201020633243U CN 201865724 U CN201865724 U CN 201865724U
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- expansion chamber
- sound
- cylindrical shell
- suction tude
- cylinder body
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Abstract
The utility model relates to a sound damping device for the air exhaust of an automobile. The sound damping device for the air exhaust of the automobile comprises a cylinder body, wherein the cross section of the cylinder body is elliptical, both ends of the cylinder body are also sealed, the inside of the cylinder body is sequentially partitioned into four expansion chambers by three baffle plates, and an air inlet pipe sequentially penetrates through one sealed end of the cylinder body and the middle parts of the two previous expansion chambers; two sound-damping pipes are arranged in parallel with the air inlet pipe by a maximum distance and sequentially penetrate through the three previous expansion chambers; an air outlet pipe is arranged in a fourth expansion chamber and also penetrates out of the other sealed end of the cylinder body, and sound-damping holes are also distributed on the pipe wall of the air outlet pipe, which is positioned in the fourth expansion chamber; and communicating sound-damping small pipes are evenly arranged on the baffle plate between the two adjacent middle expansion chambers. By the utility model, high-speed pulsating airflow can be converted into low-speed stable airflow; therefore, a mutual counteraction technology for the phased difference of noise is generated for the airflow; and the sound damping device provided by the utility model has the advantages of novel structure, large sound-damping capacity, small air-exhaust resistance, low air-exhaust back pressure and small power loss ratio, lowers the noise and saves fuel oil.
Description
Technical field
The utility model relates to the NR noise reduction field, is specifically related to a kind of automobile exhaust silencer.
Background technique
The automobile that is travelling can send multiple noise, and the difference by their sounding source can be divided into pneumatic noise, combustion noise, metal impact friction and vibration noise etc.In the various noises of automobile, engine exhaust noise is a kind of extra high noise.Silencing apparatus is to stop sound transmission and a kind of device of allowing air communication to cross, is to eliminate or the important measures of control air power noise.In recent years, along with the raising that The automobile noise control is required, Design of Automobile's Exhaust Sunbber has progressively obtained attention, yet automobile exhaust muffler is a kind of comparatively complicated acoustic element, and should sound deadening capacity big, exhaust resistance be little again, and energy consumption is low.These indexs are conflicting.Address this problem, implementing design is the problem of a more complicated.Though some theoretical formula of the design aspect of silencing apparatus, but because of these formula result calculated and actual conditions differ bigger, do pre-estimation so remove the small part formula in the actual design, all the other nearly all do not use, and trial-and-error method commonly used is developed silencing apparatus by designing repeatedly, manufacture experimently, testing.This also is the subject matter that is faced in present many muffler design processes.Domestic the design of exhaust silencer and the research of acoustic characteristics are mostly also rested on the stage of fumbling, mainly rely on experience or external like product is copied; The acoustic attenuation performance of its exhaust silencer is difficult to the effect that reaches satisfied.The quality of Design of Automotive Exhaust Muffler then takes advantage of the travelling comfort and the power character (power, oil consumption, moment of torsion etc.) of seat that very big influence is arranged to environmental protection, automobile.
Design of Automobile's Exhaust Sunbber answers emphasis to consider following three aspects: 1. the sound deadening capacity of silencing apparatus can make ambient noise meet country's " industrial enterprise's noise sanitary standard "; 2. the conformability of silencing apparatus (drag losses is little, do not play dirt when anechoic frequency bandwidth, work, be not afraid of mist of oil, aqueous vapor, high temperature resistant, anti-high velocity air impact); 3. the structural behaviour of silencing apparatus (compact on the structure, volume is little, in light weight, intensity is high, installation is put just, cost is low, the life-span is long).
Summary of the invention
The technical problems to be solved in the utility model provides that a kind of sound deadening capacity is big, noise reduction, saving fuel oil, exhaust resistance is little, exhaust back pressure is low, power loss ratio is little automobile exhaust silencer.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of automobile exhaust silencer, comprise that cross section is oval and sealed at both ends cylindrical shell, suction tude, steam outlet pipe, two hush tubes, three dividing plates, be divided into first expansion chamber, second expansion chamber, the 3rd expansion chamber, the 4th expansion chamber by three baffle region successively in the described cylindrical shell, described suction tude is successively through the middle part of cylindrical shell one sealed end, first expansion chamber, second expansion chamber, and this suction tude is positioned on the tube wall of cylindrical shell and is laid with sound attenuation hole; Spacing and described suction tude with maximum between two hush tubes be arranged in parallel, and this two hush tube runs through first expansion chamber, second expansion chamber, the 3rd expansion chamber successively, and it is positioned on the tube wall of the 3rd expansion chamber and is laid with sound attenuation hole; Described steam outlet pipe is arranged in the 4th expansion chamber and passes another sealed end of described cylindrical shell, and it is positioned on the tube wall of the 4th expansion chamber and is laid with sound attenuation hole; On the dividing plate between second expansion chamber and the 3rd expansion chamber, evenly be provided with 2～6 noise elimination tubules that are communicated with this two Room.
Described noise elimination tubule is provided with the noise elimination aperture.
Described suction tude, the coaxial setting of steam outlet pipe.
The medial axis of described suction tude, steam outlet pipe, two hush tubes is positioned at same plane.
All be filled with sound-absorbing material in the inner walls of described cylindrical shell and the formed space of perforation half tone.
Described sound-absorbing material is ultra-fine temperature glass cotton.
The utlity model has actively useful effect:
1. become the optimization of airflow sectional area, the high speed pulse pneumatic is become the low speed steady air flow, make air-flow produce the noise phase difference and cancel out each other; When the high-temp waste gas of motor with at a high speed when outlet pipe enters silencing apparatus because the sectional area of silencing pot increases gradually, air-flow is expanded, flow velocity reduces, powerful microseismic noise is decayed.When air-flow continues to flow through each expansion chamber, because stopping of dividing plate, air-flow can only pass through from a sky of the throttling on the dividing plate and a tube core, so air-flow is compressed suddenly, be divided into many threads, after expanded suddenly again, so repeatedly the sudden change, the big high attenuation of acoustic energy quilt, thus play the effect that reduces exhaust sound.
2. the utility model novel structure, it is big to have a sound deadening capacity, reduces noise, saves fuel oil, the advantage that exhaust resistance is little, exhaust back pressure is low, power loss ratio is little.
Description of drawings
Fig. 1 is a kind of cross-sectional view of automobile exhaust silencer;
Fig. 2 is the A-A view of Fig. 1.
1 is steam outlet pipe among the figure, and 2,7 are respectively forward and backward sealing cover, and 3 is frame, 4,5,6 is dividing plate, 8 is suction tude, and 9,10 is hush tube, and 11 are the noise elimination tubule, 12 is first expansion chamber, 13 is second expansion chamber, and 14 is the 3rd expansion chamber, and 15 is the 4th expansion chamber, 16 is the superfine fibre cotton, and 17 is inner housing.
Embodiment
For technological means, character of innovation that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
1 one kinds of automobile exhaust silencer of embodiment, referring to Fig. 1, Fig. 2, comprise that cross section is that oval and sealed at both ends cylindrical shell is (by inner housing 17, frame 3 and superfine fibre cotton 16 constitutes), suction tude 8, steam outlet pipe 1, two hush tubes 9,10, three dividing plates 4,5,6, in the described noise elimination cylindrical shell successively by three baffle region 4,5,6 are divided into first expansion chamber 12, second expansion chamber 13, the 3rd expansion chamber 14, the 4th expansion chamber 15, suction tude 8 is sealing cover 7 behind the cylindrical shell successively, first expansion chamber 12, the middle part of second expansion chamber 13, and this suction tude 8 is positioned on the tube wall of cylindrical shell and is laid with sound attenuation hole; Spacing and suction tude 8 with maximum between two hush tubes 9,10 be arranged in parallel, this two hush tube 9,10 runs through first expansion chamber 12, second expansion chamber 13, the 3rd expansion chamber 14 respectively successively, and it is positioned on the tube wall of the 3rd expansion chamber 14 and is laid with sound attenuation hole; Steam outlet pipe 1 is arranged in the 4th expansion chamber 15 and passes sealing cover 2 before the cylindrical shell, and it is positioned on the tube wall of the 4th expansion chamber 15 and is laid with sound attenuation hole; On the dividing plate 5 between second expansion chamber 13 and the 3rd expansion chamber 14, evenly be provided with 6 noise elimination tubules 11 that are communicated with this two Room.The medial axis of suction tude 8, steam outlet pipe 1, two hush tubes 9,10 is positioned at same plane.
When this automobile exhaust silencer used, air-flow was entered by suction tude 8, circulated in first expansion chamber 12, second expansion chamber 13, the 3rd expansion chamber 14, the 4th expansion chamber 15, through 10,11 hush tubes and dividing plate sound attenuation hole, discharged by steam outlet pipe 1; Thereby sound wave carries out full range decay noise reduction sound in whole circulation of air flow process.This noise reduction silencer has novel structure, exhaust resistance is little, power loss is few advantage.
2 one kinds of automobile exhaust silencer of embodiment, substantially the same manner as Example 1, difference is: be filled with the sound-absorbing material industrial felt at inside and outside housing.
Claims (6)
1. automobile exhaust silencer, comprise that cross section is oval and sealed at both ends cylindrical shell, suction tude, steam outlet pipe, two hush tubes, three dividing plates, it is characterized in that, be divided into first expansion chamber, second expansion chamber, the 3rd expansion chamber, the 4th expansion chamber by three baffle region successively in the described cylindrical shell, described suction tude is successively through the middle part of cylindrical shell one sealed end, first expansion chamber, second expansion chamber, and this suction tude is positioned on the tube wall of cylindrical shell and is laid with sound attenuation hole; Spacing and described suction tude with maximum between two hush tubes be arranged in parallel, and this two hush tube runs through first expansion chamber, second expansion chamber, the 3rd expansion chamber successively, and it is positioned on the tube wall of the 3rd expansion chamber and is laid with sound attenuation hole; Described steam outlet pipe is arranged in the 4th expansion chamber and passes another sealed end of described cylindrical shell, and it is positioned on the tube wall of the 4th expansion chamber and is laid with sound attenuation hole; On the dividing plate between second expansion chamber and the 3rd expansion chamber, evenly be provided with 2～6 noise elimination tubules that are communicated with this two Room.
2. according to the described automobile exhaust silencer of claim 1, it is characterized in that described noise elimination tubule is provided with the noise elimination aperture.
3. according to the described automobile exhaust silencer of claim 1, it is characterized in that described suction tude, the coaxial setting of steam outlet pipe.
4. according to the described automobile exhaust silencer of claim 1, it is characterized in that the medial axis of described suction tude, steam outlet pipe, two hush tubes is positioned at same plane.
5. according to the described automobile exhaust silencer of claim 1, it is characterized in that, all be filled with sound-absorbing material in the space that the inner walls of described cylindrical shell and perforation half tone form.
6. according to the described automobile exhaust silencer of claim 5, it is characterized in that described sound-absorbing material is a super glass wool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206332436U CN201865724U (en) | 2010-11-30 | 2010-11-30 | Sound damping device for air exhaust of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206332436U CN201865724U (en) | 2010-11-30 | 2010-11-30 | Sound damping device for air exhaust of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201865724U true CN201865724U (en) | 2011-06-15 |
Family
ID=44136881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206332436U Expired - Fee Related CN201865724U (en) | 2010-11-30 | 2010-11-30 | Sound damping device for air exhaust of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201865724U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518499A (en) * | 2011-11-29 | 2012-06-27 | 中国商用飞机有限责任公司 | Silencer |
| CN103438323A (en) * | 2013-08-30 | 2013-12-11 | 西安交通大学 | L-type impact air flow attenuator |
| CN105715420A (en) * | 2016-03-08 | 2016-06-29 | 广东康菱动力科技有限公司 | Intake and exhaust system of gas engine |
-
2010
- 2010-11-30 CN CN2010206332436U patent/CN201865724U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518499A (en) * | 2011-11-29 | 2012-06-27 | 中国商用飞机有限责任公司 | Silencer |
| CN103438323A (en) * | 2013-08-30 | 2013-12-11 | 西安交通大学 | L-type impact air flow attenuator |
| CN103438323B (en) * | 2013-08-30 | 2015-07-01 | 西安交通大学 | L-type impact air flow attenuator |
| CN105715420A (en) * | 2016-03-08 | 2016-06-29 | 广东康菱动力科技有限公司 | Intake and exhaust system of gas engine |
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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: 20110615 Termination date: 20141130 |
|
| EXPY | Termination of patent right or utility model |