CN202659308U - Automobile exhaust muffler - Google Patents
Automobile exhaust muffler Download PDFInfo
- Publication number
- CN202659308U CN202659308U CN 201220346310 CN201220346310U CN202659308U CN 202659308 U CN202659308 U CN 202659308U CN 201220346310 CN201220346310 CN 201220346310 CN 201220346310 U CN201220346310 U CN 201220346310U CN 202659308 U CN202659308 U CN 202659308U
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- CN
- China
- Prior art keywords
- dividing plate
- noise
- automobile exhaust
- spacer plate
- 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.)
- 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 improvements of automobile exhaust mufflers. The automobile exhaust muffler comprises a first spacer plate and a second spacer plate which are arranged at intervals, wherein two perforated pipes are connected between the first spacer plate and the second spacer plate, and two ends of the two perforated pipes extend to the outer sides of the first spacer plate and the second spacer plate; a plurality of uniformly distributed through holes are formed in wall bodies of the perforated pipes which are positioned between the first spacer plate and the second spacer plate; and two uniformly distributed first through holes are formed in the first spacer plate, and two uniformly distributed second through holes are formed in the second spacer plate. The automobile exhaust muffler is simple in structure and has a good muffling 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 a kind of simple in structure, automobile exhaust muffler that soundproof effect is good.
For achieving the above object, the technological scheme that the utility model adopts is:
A kind of automobile exhaust muffler comprises spaced dividing plate one, dividing plate two; 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; Offer two equally distributed through holes one on the dividing plate one, offer two equally distributed through holes two on the dividing plate two.
As the further setting of such scheme, the external diameter of described perforated pipe is 85mm.
The diameter of described perforation is 3mm.
Described dividing plate one, dividing plate two are circular dividing plate.
A kind of exhaust silencer of the utility model, 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, a kind of automobile exhaust muffler of the utility model comprises spaced dividing plate 1, dividing plate 26; Be connected with two perforated pipes 4 between dividing plate 1 and the dividing plate 26, and the two ends of two perforated pipes 4 all extend to the outside of dividing plate 1 and dividing plate 26; Perforated pipe 4 wall bodies between dividing plate 1 and dividing plate 26 offer several equally distributed perforation 7; Offer two equally distributed through holes 1 on the dividing plate 1, offer two equally distributed through holes 29 on the dividing plate 26.
Wherein, the external diameter of perforated pipe 4 is 85mm.The diameter of perforation 7 is 3mm.Dividing plate 1, dividing plate 26 are circular dividing plate.
The propagation process of sound is as follows in the utility model: sound enters cavity 1 from suction tude, then a part directly is delivered to the cavity 3 from two perforated pipes 4, a part is delivered in the cavity 2 by the perforation 7 on the perforated pipe 4, remainder enters in the cavity 3 by through hole 1, through hole 29 successively, discharges by the steam outlet pipe of silencing apparatus at last.The sound HFS can be effectively eliminated in perforation 7 on the perforated pipe 4; And each two through hole on two dividing plates are because the unexpected variation of both sides sectional area, and sound reflects in middle cavity, thereby reduces passing through of sound, and this mainly reduces the low frequency part of sound.The use of two kinds of structures, thus in the whole interval of high frequency, can both play certain soundproof effect at low frequency.
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 (4)
1. an automobile exhaust muffler is characterized in that: comprise spaced dividing plate one, dividing plate two; 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; Offer two equally distributed through holes one on the dividing plate one, offer two equally distributed through holes two on the dividing plate two.
2. a kind of automobile exhaust muffler as claimed in claim 1, it is characterized in that: the external diameter of described perforated pipe is 85mm.
3. a kind of automobile exhaust muffler as claimed in claim 1, it is characterized in that: the diameter of described perforation is 3mm.
4. a kind of automobile exhaust muffler as claimed in claim 1, it is characterized in that: described dividing plate one, dividing plate two are circular dividing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220346310 CN202659308U (en) | 2012-07-18 | 2012-07-18 | Automobile exhaust muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220346310 CN202659308U (en) | 2012-07-18 | 2012-07-18 | Automobile exhaust muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659308U true CN202659308U (en) | 2013-01-09 |
Family
ID=47454217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220346310 Expired - Fee Related CN202659308U (en) | 2012-07-18 | 2012-07-18 | Automobile exhaust muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202659308U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748094A (en) * | 2012-07-18 | 2012-10-24 | 绍兴文理学院 | Exhaust silencer for automobile |
-
2012
- 2012-07-18 CN CN 201220346310 patent/CN202659308U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748094A (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 |