CN201884108U - Two-level muffling exhaust pipe - Google Patents
Two-level muffling exhaust pipe Download PDFInfo
- Publication number
- CN201884108U CN201884108U CN2010206534334U CN201020653433U CN201884108U CN 201884108 U CN201884108 U CN 201884108U CN 2010206534334 U CN2010206534334 U CN 2010206534334U CN 201020653433 U CN201020653433 U CN 201020653433U CN 201884108 U CN201884108 U CN 201884108U
- Authority
- CN
- China
- Prior art keywords
- acoustic chamber
- main
- exhaust pipe
- muffling
- baffler
- 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
Links
- 239000011358 absorbing material Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000011229 interlayer Substances 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 5
- 239000010410 layer Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
Images
Abstract
The utility model relates to a muffling exhaust pipe, in particular to a two-level muffling exhaust pipe, belonging to the field of a muffling device of an internal-combustion engine. The muffling exhaust pipe is characterized in that a main sound transmission chamber is hermetically connected at the rear of the exhaust pipe; a main muffler is hermetically connected at the rear of the main sound transmission chamber; and each sound transmission chamber adopts a horn-shaped interlayer vacuum structure. A muffler adopts a clapboard structure, and the bottom layer of the muffler is lined with a muffling material. The main sound transmission chamber is communicated with an auxiliary sound transmission chamber that is communicated with the exhaust pipe. The two-level muffling exhaust pipe is simple in structure, good in muffling effect, extremely low in cost and good in market prospect.
Description
Technical field
The utility model relates to a kind of noise reduction outlet pipe, particularly two-stage noise reduction outlet pipe, belongs to the silencer field of internal combustion engine.
Background technique
Traffic noise be one of noise source in the urban environment noise, and the automobile exhaust noise is the main noise source of car noise by producing in the motor-driven vehicle going process, also is the emphasis of urban environment noise control.
For reducing exhaust noise, Motor Vehicle generally adopts the noise reduction outlet pipe, automobile noise reduction outlet pipe is one and matured product, its basic structure and working principle decades almost do not change, and now are badly in need of the better noise reduction outlet pipe of erasure effect of a kind of novel structure, cheap and general noise reduction product.
Summary of the invention
In view of this, the purpose of this utility model provides the better noise reduction outlet pipe of erasure effect of a kind of novel structure, cheap and general noise reduction product.
For achieving the above object, the utility model provides following technological scheme: the outlet pipe main acoustic chamber that is tightly connected, behind main acoustic chamber, be tightly connected over against the main baffler of exhaust pipe mouth, the other time acoustic chamber that connects of main acoustic chamber sidewall, behind inferior acoustic chamber, be tightly connected time baffler, the other tracheae that runs in of inferior acoustic chamber sidewall.
Described main acoustic chamber and time acoustic chamber are that horn-like shape and sidewall are the laminated vacuum structure.
All be provided with the multi-disc dividing plate in described baffler and the main baffler, in dividing plate bottom slit, be lined with sound absorbing material.
Concrete working procedure of the present utility model and beneficial effect: engine operation when internal-combustion engine vent-pipe scavenges, has also constituted a noise source simultaneously.Sound wave is propagated forward, and in the process of propagating, because the laminated vacuum structure is adopted in the acoustic chamber, sound wave is difficult to appear the acoustic chamber.Utilized the different physical property of sound wave with air-flow simultaneously, air-flow is when changing the flow direction, and sound wave still propagates into forward in the main muffler, absorbs most acoustic wave energies.In air-flow enters into time acoustic chamber, also have acoustic wave segment to enter into time acoustic chamber, the inferior baffler that is connected is absorbed.Off-gas flows enters outlet pipe at last, discharges through outlet pipe.The present invention is simple in structure, and erasure effect is good, can add multistage baffler as the case may be, and cost is extremely low, has good market prospects.
Description of drawings
Fig. 1 looks generalized section for the utility model master.
In Fig. 1, outlet pipe 1, interlayer 2, main acoustic chamber 3, inferior acoustic chamber 4, inferior baffler 5, main baffler 6, outlet pipe 7.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
When internal-combustion engine vent-pipe 1 scavenges, also constituted a noise source simultaneously.The outlet pipe 1 horn-like main acoustic chamber 3 that is tightly connected, main baffler 6 is tightly connected behind 3 dead asterns, main acoustic chamber, the other again acoustic chamber 4 that connects trumpet-shaped time of horn-like main acoustic chamber 3 sidewalls, the dead astern in inferior acoustic chamber 4 also is sealedly connected with time baffler 5, the inferior acoustic chamber 4 sidewalls tracheae 9 that runs in.The sidewall in main acoustic chamber 3 and time acoustic chamber 4 is the laminated vacuum structure, can prevent better that sound from spreading out of.All be provided with the multi-disc dividing plate in inferior baffler 5 and the main baffler 6, in dividing plate bottom slit, be lined with sound absorbing material.
Claims (3)
1. two-stage noise reduction outlet pipe, it is characterized in that: the outlet pipe main acoustic chamber that is tightly connected is tightly connected over against the main baffler of exhaust pipe mouth the other time acoustic chamber that connects of main acoustic chamber sidewall behind main acoustic chamber, behind inferior acoustic chamber, be tightly connected time baffler, the other tracheae that runs in of inferior acoustic chamber sidewall.
2. by the described two-stage noise reduction of claim 1 outlet pipe, it is characterized in that: main acoustic chamber and time acoustic chamber are that horn-like shape and sidewall are the laminated vacuum structure.
3. by the described two-stage noise reduction of claim 2 outlet pipe, it is characterized in that: all be provided with the multi-disc dividing plate in inferior baffler and the main baffler, in dividing plate bottom slit, be lined with sound absorbing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206534334U CN201884108U (en) | 2010-12-12 | 2010-12-12 | Two-level muffling exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206534334U CN201884108U (en) | 2010-12-12 | 2010-12-12 | Two-level muffling exhaust pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201884108U true CN201884108U (en) | 2011-06-29 |
Family
ID=44181648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206534334U Expired - Fee Related CN201884108U (en) | 2010-12-12 | 2010-12-12 | Two-level muffling exhaust pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201884108U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011636A (en) * | 2010-12-12 | 2011-04-13 | 昆明理工大学 | Two-stage noise reduction exhaust pipe |
-
2010
- 2010-12-12 CN CN2010206534334U patent/CN201884108U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011636A (en) * | 2010-12-12 | 2011-04-13 | 昆明理工大学 | Two-stage noise reduction exhaust pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20121212 |