CN102748095A - Exhaust silencer for automobile - Google Patents
Exhaust silencer for automobile Download PDFInfo
- Publication number
- CN102748095A CN102748095A CN2012102474268A CN201210247426A CN102748095A CN 102748095 A CN102748095 A CN 102748095A CN 2012102474268 A CN2012102474268 A CN 2012102474268A CN 201210247426 A CN201210247426 A CN 201210247426A CN 102748095 A CN102748095 A CN 102748095A
- Authority
- CN
- China
- Prior art keywords
- dividing plate
- noise
- partition plate
- automobile
- exhaust muffler
- 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.)
- Pending
Links
Landscapes
- Exhaust Silencers (AREA)
Abstract
The invention discloses an exhaust silencer for an automobile, and belongs to the technical field of structural improvement of exhaust silencers for automobiles. The exhaust silencer for the automobile comprises a first partition plate, a second partition plate and a third partition plate which are sequentially arranged at intervals; two perforated pipes are connected between the first partition plate and the second partition plate, and two ends of each of the two perforated pipes extend to the outer sides of the first partition plate and the second partition plate; and a plurality of first perforated holes which are uniformly distributed are arranged on the walls of the perforated pipes positioned between the first partition plate and the second partition plate, and a plurality of second perforated holes which are uniformly distributed are arranged on the third partition plate. The exhaust silencer for the automobile is simple in structure and good in silencing effect.
Description
Technical field
The present invention discloses a kind of automobile exhaust muffler, belongs to the technical field of automobile exhaust muffler architecture advances.
Background technique
Along with the raising of industrialization degree, the noise hazard scope enlarges day by day, and the development of the progress of social modernization and automotive industry and transportation makes the owning amount of domestic automobile grow with each passing day.Reform and opening-up is over 20 years, and along with the progressively improvement of development of city and road infrastructure, the various types of vehicles quantity in city sharply rises, and traffic noise pollution is more and more serious, and people's work and health affected are also more and more received publicity.2000, through the road traffic noise in 214 cities is monitored discovery, 8.9% municipal pollution was heavier, and 22.4% city belongs to intermediate pollution, and 53.3% city belongs to slight pollution, had only 15.4% city sound environment quality better.
Noise pollution mainly shows the sense of hearing and the non-sense of hearing two aspects to people's harm.Very noisy hinders the normal talk of people and influences people's normal rest etc., is exposed to for a long time in the strong noise environment, is prone to make the people deafness to occur, these harm that all to be noise contributions cause in people's the sense of hearing; The aspect of the non-sense of hearing then is meant the harm that nervous system, digestive system, respiratory system of noise remote-effects people etc. produced.The harm of noise on human body mainly shows following three aspects:
(1) to the damage of the sense of hearing: a large amount of investigation and research proof, if being among the strong noise environment for a long time, people do not take effective protective measures will cause deafness gradually.Have only noise level below 80 decibels, could the unlikely deafness of guarantor's long-term work.
(2) influence people's physiological health: a large amount of cardiopathic development and deterioration and noise have close getting in touch, and noise can cause the nervous reaction of human body, and adrenaline is increased, thereby cause alteration in heart rate and blood pressure rising.
(3) influence people's psychology: noise is had the fidgets the people, produces sense of fatigue, influence energy and concentrates and working efficiency, owing to the masking effect of noise, often makes the people be difficult for discovering danger signal, thereby causes the accident again.
The main automobile superpower in the world shows showing great attention to and strict day by day control the noise pollution problem one after another like the U.S., Japan, European Union, Korea S etc.Britain has just worked out as far back as nineteen sixty and has prevented the noise method, and the Noise Prevention and Treatment regulations have also been worked out in cities such as USA New York, Chicago, Los Angeles in succession.China is also corresponding to have worked out noise standard, and standard revision in per basically 5 years once, to satisfy the raising of people to environmental requirement.
The car owning amount of China is increasing, and people no longer only are the traffic tool to the requirement of automobile, more require the energy-conserving and environment-protective of car, and are attractive in appearance and comfortable.The traffic noise of motor vehicle is main sources of urban road noise, will be constantly strict to the legislations for noise of automobile.
According to statistics, urban traffic noise is a topmost noise source in the current urban environment noise, accounts for the 50%-75% of entire environment noise energy.Therefore the control key of city noise pollution is to control urban traffic noise.And the main noise source of urban traffic noise is an automobile noise at present, thereby the key of solution city noise pollution is the noise control to automobile.
In the automobile noise, exhaust sound is the main noise source of automobile and motor thereof, and its noise is the high 10-15dB of ratio engine total noise of centrifuge (except the exhaust sound) often.The noise that produces during diesel engine work is mainly by combustion noise, and mechanical noise and aerodynamic noise are formed, and wherein the exhaust sound in the aerodynamic noise is the most outstanding, and reducing exhaust sound the most also is that most important method is to adopt exhaust silencer.In order to eliminate exhaust sound as much as possible, must design high performance silencing apparatus.
Summary of the invention
The purpose of this invention is to provide a kind of effective automobile exhaust muffler of eliminating the noise.
For achieving the above object, the technological scheme that the present invention adopted is:
A kind of automobile exhaust muffler comprises spaced successively dividing plate one, dividing plate two, dividing plate three; Be connected with two perforated pipes between dividing plate one and the dividing plate two, and the two ends of two perforated pipes all extend to the outside of dividing plate one and dividing plate two; Simultaneously on the perforated pipe wall body between dividing plate one and the dividing plate two, offer several equally distributed perforation one, offer several equally distributed perforation two on the dividing plate three.
As the further setting of such scheme, the external diameter of said perforated pipe is 85mm.
The diameter of the perforation two on the said dividing plate three is 3mm.
The quantity of perforation two is 77 on the said dividing plate three.
Described dividing plate one, dividing plate two, dividing plate three are circular dividing plate, be positioned on the same axis between dividing plate one, dividing plate two, the dividing plate three, and size are identical.
Equidistantly be spaced between described dividing plate one, dividing plate two, the dividing plate three.
Described two perforated pipes are evenly distributed between dividing plate one and the dividing plate two.
Exhaust silencer of the present invention, simple in structure, eliminate the noise effective.
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
As shown in Figure 1, automobile exhaust muffler of the present invention comprises equidistant successively spaced dividing plate 1, dividing plate 26, dividing plate 37.Be connected with two perforated pipes 8 between dividing plate 1 and the dividing plate 26, and the two ends of two perforated pipes 8 all extend to the respective outer of dividing plate 1 and dividing plate 26; Simultaneously on perforated pipe 8 wall bodies between dividing plate 1 and the dividing plate 26, offer several equally distributed perforation 1, offer several equally distributed perforation 2 10 on the dividing plate 37.
Wherein, the external diameter of perforated pipe 8 is 85mm.The diameter of the perforation 2 10 on the dividing plate 37 is 3mm, and quantity is 77.
Dividing plate 1, dividing plate 26, dividing plate 37 are circular dividing plate, be positioned on the same axis between dividing plate 1, dividing plate 26, the dividing plate 37, and size are identical.Two perforated pipes 8 are evenly distributed between dividing plate 1 and the dividing plate 26.
The propagation process of sound is following among the present invention: sound gets into cavity 1 from suction tude, transmits through perforated pipe 8 then, and a part is directly delivered in the cavity 3, and another part is delivered in the cavity 2 through the perforation 1 above the perforated pipe 8.Then, the sound in the cavity 3 is delivered in the cavity 4 through the perforation 2 10 above the dividing plate 37, discharges through the steam outlet pipe of silencing apparatus at last.In the process of transmitting, the unexpected variation of volume is mainly better for the low-frequency range noise elimination effect of sound; And the use of perforated pipe 8 and dividing plate 37 is better for the noise elimination effect of the high band of sound.
Compare with existing structure, the present invention is divided into four cavitys with original three cavitys, and research shows, during the cavity of given volume, the number of cavities that is divided into suitably increases, and helps the overall noise elimination of silencing apparatus; Because the quantity of perforation increases, therefore, sound is when transmitting through perforation, and the energy of loss is bigger, and is especially more outstanding on the high frequency acoustic characteristics.Existing structure is directly opened two macropores on dividing plate; This spline structure makes sound be directly delivered to air outlet side; And the structure after the present invention's improvement makes sound in silencing apparatus, fully transmit after the noise elimination, and sound obtains consuming more completely, so the noise elimination better effects if of high and low frequency.
Through evidence, the present invention is in the 500-800Hz low-frequency range, and the level of on average eliminating the noise is more than 20dB, and maximum noise elimination value reaches 67dB, and the silencing apparatus of existing structure is merely 20dB in the noise elimination maximum value of this frequency range.The present invention is in the 1800-2400Hz frequency range, and the level of on average eliminating the noise is more than 30dB, and maximum noise elimination value reaches 80dB, and the silencing apparatus of existing structure in the noise elimination maximum value of this frequency range less than 35dB.The present invention is in 2700-3800Hz medium-high frequency section, and the level of on average eliminating the noise is more than 20dB, and maximum noise elimination value reaches 50dB, and the silencing apparatus of existing structure in the noise elimination of this frequency range basically all below 25dB.By last analysis, noise elimination effect of the present invention is significantly improved.
The foregoing description only is used to the inventive concept of the present invention of explaining, but not to the qualification of rights protection of the present invention, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should fall into protection scope of the present invention.
Claims (7)
1. automobile exhaust muffler is characterized in that: comprise spaced successively dividing plate one, dividing plate two, dividing plate three; Be connected with two perforated pipes between dividing plate one and the dividing plate two, and the two ends of two perforated pipes all extend to the outside of dividing plate one and dividing plate two; Simultaneously on the perforated pipe wall body between dividing plate one and the dividing plate two, offer several equally distributed perforation one, offer several equally distributed perforation two on the dividing plate three.
2. automobile exhaust muffler as claimed in claim 1 is characterized in that: the external diameter of said perforated pipe is 85mm.
3. automobile exhaust muffler as claimed in claim 1 is characterized in that: the diameter of the perforation two on the said dividing plate three is 3mm.
4. automobile exhaust muffler as claimed in claim 1 is characterized in that: the quantity of perforation two is 77 on the said dividing plate three.
5. automobile exhaust muffler as claimed in claim 1 is characterized in that: described dividing plate one, dividing plate two, dividing plate three are circular dividing plate, be positioned on the same axis between dividing plate one, dividing plate two, the dividing plate three, and size are identical.
6. automobile exhaust muffler as claimed in claim 5 is characterized in that: equidistantly be spaced between described dividing plate one, dividing plate two, the dividing plate three.
7. automobile exhaust muffler as claimed in claim 1 is characterized in that: described two perforated pipes are evenly distributed between dividing plate one and the dividing plate two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102474268A CN102748095A (en) | 2012-07-18 | 2012-07-18 | Exhaust silencer for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102474268A CN102748095A (en) | 2012-07-18 | 2012-07-18 | Exhaust silencer for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102748095A true CN102748095A (en) | 2012-10-24 |
Family
ID=47028545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102474268A Pending CN102748095A (en) | 2012-07-18 | 2012-07-18 | Exhaust silencer for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102748095A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB534568A (en) * | 1939-05-01 | 1941-03-10 | Burgess Battery Co | Improvements in or relating to silencing devices for flowing, pulsating gases |
| US6241044B1 (en) * | 1999-02-05 | 2001-06-05 | Komatsu Ltd. | Exhaust silencer and communicating pipe thereof |
| CN201184226Y (en) * | 2008-04-14 | 2009-01-21 | 贾永康 | Automobile energy-saving silencer |
| CN201714459U (en) * | 2010-05-28 | 2011-01-19 | 浙江大学 | Automobile exhaust silencer |
| CN102392717A (en) * | 2011-10-25 | 2012-03-28 | 湛江市华夏消声器有限公司 | Automobile silencer with five chambers |
| CN202659309U (en) * | 2012-07-18 | 2013-01-09 | 绍兴文理学院 | Automobile exhaust muffler |
-
2012
- 2012-07-18 CN CN2012102474268A patent/CN102748095A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB534568A (en) * | 1939-05-01 | 1941-03-10 | Burgess Battery Co | Improvements in or relating to silencing devices for flowing, pulsating gases |
| US6241044B1 (en) * | 1999-02-05 | 2001-06-05 | Komatsu Ltd. | Exhaust silencer and communicating pipe thereof |
| CN201184226Y (en) * | 2008-04-14 | 2009-01-21 | 贾永康 | Automobile energy-saving silencer |
| CN201714459U (en) * | 2010-05-28 | 2011-01-19 | 浙江大学 | Automobile exhaust silencer |
| CN102392717A (en) * | 2011-10-25 | 2012-03-28 | 湛江市华夏消声器有限公司 | Automobile silencer with five chambers |
| CN202659309U (en) * | 2012-07-18 | 2013-01-09 | 绍兴文理学院 | Automobile exhaust muffler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201714459U (en) | Automobile exhaust silencer | |
| CN204082265U (en) | A kind of exhaust silencer | |
| CN203655385U (en) | Silencer for engine exhaust system | |
| CN203962104U (en) | A kind of outlet pipe baffler | |
| CN204060859U (en) | A kind of exhaust silencer and automobile | |
| CN102278183B (en) | Diesel engine exhaust silencer of composite structure | |
| CN202659309U (en) | Automobile exhaust muffler | |
| CN202659310U (en) | Exhaust silencer | |
| CN210948839U (en) | Combined automobile silencing exhaust pipe structure | |
| CN102748095A (en) | Exhaust silencer for automobile | |
| CN202659308U (en) | Automobile exhaust muffler | |
| CN102748094A (en) | Exhaust silencer for automobile | |
| CN206681825U (en) | A kind of Exhaust Muffler of Car system | |
| CN102758666A (en) | Exhaust muffler | |
| CN212454576U (en) | Automobile muffler capable of reducing noise for multiple times | |
| CN202117737U (en) | Exhaust silencer for high-capacity automobile | |
| CN211549805U (en) | Impedance composite silencer | |
| CN204552887U (en) | A kind of porous jet-type silencing apparatus | |
| CN202811011U (en) | Main muffler with no sound-absorbing cotton | |
| CN204041182U (en) | The secondary silencing apparatus of motor car engine | |
| CN206299431U (en) | A kind of automobile tail gas noise elimination device | |
| CN203321650U (en) | Transverse flow perforated pipe silencer structure with choked flow barrier | |
| CN202417653U (en) | Silencer for automobile | |
| CN102392717A (en) | Automobile silencer with five chambers | |
| CN202789047U (en) | Back-stage muffler for auto vent-pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121024 |