CN202659309U - Automobile exhaust muffler - Google Patents
Automobile exhaust muffler Download PDFInfo
- Publication number
- CN202659309U CN202659309U CN 201220346372 CN201220346372U CN202659309U CN 202659309 U CN202659309 U CN 202659309U CN 201220346372 CN201220346372 CN 201220346372 CN 201220346372 U CN201220346372 U CN 201220346372U CN 202659309 U CN202659309 U CN 202659309U
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- CN
- China
- Prior art keywords
- dividing plate
- noise
- automobile exhaust
- exhaust muffler
- partition plate
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- 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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- Exhaust Silencers (AREA)
Abstract
The utility model discloses an automobile exhaust muffler and belongs to the technical field of structure improvement of the automobile exhaust muffler. The automobile exhaust muffler comprises a partition plate 1, a partition plate 2 and a partition plate 3 which are sequentially arranged at intervals; two perforated pipes are connected between the partition plate 1 and the partition plate 2; two ends of the two perforated pipes extend to the outer sides of the partition plate 1 and the partition plate 2; a plurality of uniformly distributed perforating holes 1 are arranged on the wall bodies of the perforated pipes between the partition plate 1 and the partition plate 2, and a plurality of uniformly distributed perforating holes 2 are arranged on the partition plate 3. The automobile exhaust muffler disclosed by the utility model is simple in structure and good in silencing effect.
Description
Technical field
The utility model 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, noise hazard scope expanding day, the development of the progress of social modernization and automotive industry and transportation is so that the owning amount of domestic automobile grows with each passing day.Reform and opening-up is over 20 years, and along with the development in city and the progressively improvement of 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 healthy impact are also more and more received publicity.2000, by 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, only had 15.4% urban sound environmental quality better.
Noise pollution is mainly manifested in 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 affects people's normal rest etc., is exposed to for a long time in the strong noise environment, easily makes the people deafness 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 refers to the harm that nervous system, digestive system, respiratory system of noise remote-effects people etc. produces.The harm of noise on human body is mainly manifested in following three aspects:
(1) to the damage of the sense of hearing: a large amount of investigation and studies have shown that, if being among the strong noise environment for a long time, people do not take effective protective measures will cause gradually deafness.Only has noise level below 80 decibels, the unlikely deafness of guarantee people long-term work.
(2) affect people's physiological health: a large amount of cardiopathic development and deterioration and noise have close contacting, and noise can cause the nervous reaction of human body, and adrenaline is increased, thereby cause that alteration in heart rate and blood pressure raise.
(3) affect people's psychology: noise is had the fidgets the people, produces sense of fatigue, affect 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.
World Main Auto big country shows showing great attention to and increasingly strict control problem of noise pollution one after another such as the U.S., Japan, European Union, Korea S etc.Britain has just worked out as far back as nineteen sixty and has prevented Noise Method, and the Noise Prevention and Treatment regulations have also been worked out in the cities such as USA New York, Chicago, Los Angeles in succession.China is the corresponding noise standard of having worked out also, and standard basically per 5 years the revision once, to satisfy people to the raising of 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 for the legislations for noise of automobile.
According to statistics, urban traffic noise is topmost noise source in the current urban environment noise, accounts for the 50%-75% of whole environmental noise power.Therefore the control key of city noise pollution is to control urban traffic noise.And the main noise source of urban traffic noise is 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 Sources 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 diesel engine when work produces is mainly by combustion noise, and mechanical noise and aerodynamic noise form, and wherein the exhaust sound in the aerodynamic noise is the most outstanding, reduce exhaust sound the simplest the most effective also be that most important method is to adopt exhaust silencer.In order to eliminate as much as possible exhaust sound, must design high performance silencing apparatus.
Summary of the invention
The purpose of this utility model provides the good automobile exhaust muffler of a kind of soundproof effect.
For achieving the above object, the technological scheme that the utility model adopts is:
A kind of automobile exhaust muffler comprises successively spaced 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; Perforated pipe wall body between dividing plate one and dividing plate two offers several equally distributed perforation one simultaneously, offers several equally distributed perforation two on the dividing plate three.
As the further setting of such scheme, the external diameter of described perforated pipe is 85mm.
The diameter of the perforation two on the described dividing plate three is 3mm.
The quantity of perforation two is 77 on the described 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.
The utility model exhaust silencer, simple in structure, soundproof effect good.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model automobile exhaust muffler comprises successively equidistant 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; Perforated pipe 8 wall bodies between dividing plate 1 and dividing plate 26 offer several equally distributed perforation 1 simultaneously, 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 as follows in the utility model: sound enters cavity 1 from suction tude, then transmits by perforated pipe 8, and a part is directly delivered in the cavity 3, and another part is delivered in the cavity 2 by the perforation 1 above the perforated pipe 8.Then, the sound in the cavity 3 is delivered in the cavity 4 by the perforation 2 10 above the dividing plate 37, discharges by 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 soundproof effect of sound; And the use of perforated pipe 8 and dividing plate 37 is better for the soundproof effect of the high band of sound.
Compare with existing structure, the utility model is divided into four cavitys with original three cavitys, studies show that, during the cavity of given volume, the number of cavities that is divided into suitably increases, and is conducive to the overall noise elimination of silencing apparatus; Because the quantity of perforation increases, therefore, sound is when transmitting by perforation, and the energy of loss is larger, and is especially more outstanding on the high frequency acoustic characteristics.Existing structure is directly opened two macropores at dividing plate, this spline structure is so that sound is directly delivered to air outlet side, and the utility model after improving structure so that sound in silencing apparatus, fully transmit eliminate the noise after, sound is more thoroughly consumed, therefore the soundproof effect of high and low frequency is better.
Through evidence, the utility model 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 only is 20dB in the noise elimination maximum value of this frequency range.The utility model 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 utility model 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 substantially all below 25dB.By upper analysis, soundproof effect of the present utility model is significantly improved.
Above-described embodiment only is used for explaining inventive concept of the present utility model, but not to the restriction of the utility model rights protection, allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should fall into protection domain of the present utility model.
Claims (7)
1. an automobile exhaust muffler is characterized in that: comprise successively spaced 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; Perforated pipe wall body between dividing plate one and dividing plate two offers several equally distributed perforation one simultaneously, offers several equally distributed perforation two on the dividing plate three.
2. automobile exhaust muffler as claimed in claim 1, it is characterized in that: the external diameter of described perforated pipe is 85mm.
3. automobile exhaust muffler as claimed in claim 1, it is characterized in that: the diameter of the perforation two on the described 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 described dividing plate three.
5. automobile exhaust muffler as claimed in claim 1, it 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, it 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 |
|---|---|---|---|
| CN 201220346372 CN202659309U (en) | 2012-07-18 | 2012-07-18 | Automobile exhaust muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220346372 CN202659309U (en) | 2012-07-18 | 2012-07-18 | Automobile exhaust muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659309U true CN202659309U (en) | 2013-01-09 |
Family
ID=47454218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220346372 Expired - Fee Related CN202659309U (en) | 2012-07-18 | 2012-07-18 | Automobile exhaust muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202659309U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748095A (en) * | 2012-07-18 | 2012-10-24 | 绍兴文理学院 | Exhaust silencer for automobile |
-
2012
- 2012-07-18 CN CN 201220346372 patent/CN202659309U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748095A (en) * | 2012-07-18 | 2012-10-24 | 绍兴文理学院 | Exhaust silencer for automobile |
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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: 20130109 Termination date: 20150718 |
|
| EXPY | Termination of patent right or utility model |