CN207776932U - A kind of coaxial impedance complex muffler - Google Patents
A kind of coaxial impedance complex muffler Download PDFInfo
- Publication number
- CN207776932U CN207776932U CN201820144693.5U CN201820144693U CN207776932U CN 207776932 U CN207776932 U CN 207776932U CN 201820144693 U CN201820144693 U CN 201820144693U CN 207776932 U CN207776932 U CN 207776932U
- Authority
- CN
- China
- Prior art keywords
- noise
- resonant cavity
- pipe
- expansion chambers
- communicated
- 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 abstract description 8
- 239000000463 material Substances 0.000 claims description 10
- 239000005030 aluminium foil Substances 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 5
- 239000002657 fibrous material Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000005192 partition Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003584 silencer Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a kind of coaxial impedance complex muffler, enter pipe including noise, expansion chambers, first resonant cavity, second resonant cavity and noise outlet pipe, noise is communicated in the noise by the exhaust pipe of automobile and enters pipe, the noise enters pipe and is communicated in the expansion chambers, the expansion chambers are communicated in first resonant cavity, first resonant cavity is communicated in second resonant cavity, second resonant cavity is communicated in the noise outlet pipe, the noise enters pipe and the caliber of the noise outlet pipe is identical as the caliber of the exhaust pipe of the automobile, the inner wall of the expansion chambers adheres to vibration-absorbing material layer, the outer diameter of the expansion chambers is more than the outer diameter that the noise enters pipe.The coaxial impedance complex muffler organically combines resistance noise reduction structure and reactive muffling structure, can effectively in noise high-frequency noise and low-frequency noise be filtered；The impedance composite muffler is simple in structure, can effectively reduce the exhaust resistance of automobile exhaust pipe.
Description
Technical field
The utility model belongs to automobile silencing technical field, and in particular to a kind of coaxial impedance complex muffler.
Background technology
Silencer is divided into dissipative muffler and reactive muffler, and dissipative muffler is using sound wave in porous sound-absorbing material
Or propagated in sound absorption structure, it is dissipated due to friction converts acoustic energy to thermal energy, the noise along pipe transmmision is made to decline with distance
Subtract, to reach noise elimination purpose, such silencer has a good noise elimination effect to high-frequency noises, and low frequency acoustic attenuation performance compared with
Difference, reactive muffler are that production passes through at the mutation of pipeline section or side connects resonant cavity etc. and causes impedance during acoustic propagation
Change and generates the reflection of acoustic energy, interference, it is main to achieve the purpose that noise elimination to reduce the acoustic energy from silencer to external radiation
To be suitable for reducing low frequency and the noise of middle low-frequency range.The great advantage of reactive muffler is to be without the use of sound-absorbing porous material, because
This is better than dissipative muffler in high temperature resistant, moisture resistant, condition larger to flow velocity, that cleaning is more demanding.
The patent document that Chinese Patent Application No. is 201410122321.9 discloses a kind of automotive muffler, including cylinder
Body, be equipped in the cylinder stationary barrier and with the spaced main partition board of the stationary barrier, the stationary barrier and institute
It states cylinder and constitutes rear chamber, the main partition board constitutes front chamber with the cylinder；The cylinder end face is equipped with and the fixation
The escape pipe of partition board connection, other end are equipped with the air inlet pipe being connect with the main partition board；It is characterized in that, the main partition board is
Active clapboard；The escape pipe peripheral side is corresponded on the stationary barrier corresponds to institute equipped with first through hole, on the active clapboard
It states air inlet pipe peripheral side and is equipped with the first through hole, be located at the side of the side wall and air inlet pipe of the escape pipe of the inner barrel
The second through-hole is equipped on wall；The air inlet pipe includes the main connecting tube being fixedly connected with the active clapboard, and described second is logical
Hole is located in the main connecting tube；The partial threads that the main connecting tube is located at outside the cylinder are connected with secondary connecting tube, described
Secondary connecting tube is tightly connected with the exhaust pipe；The pair connecting tube can be rotated in the exhaust pipe to drive the main company
Movement is taken over, to drive the active clapboard to be moved in the cylinder, to change the ante-chamber building volume size.
A kind of automotive muffler is disclosed in the prior art, and above-mentioned automotive muffler exists such as in the actual course of work
Lower technical problem：
Apparatus structure is complicated, increases the resistance of automobile tracheae exhaust；It is undesirable to the processing of low-frequency noise.
Based on the prior art there are technical problem as above, the present inventor combines production and research and development experience for many years, proposes
A kind of coaxial impedance complex muffler.
Utility model content
The utility model provides a kind of coaxial impedance complex muffler, and the coaxial impedance complex muffler is organic
Resistance noise reduction structure and reactive muffling structure are combined, can effectively in noise high-frequency noise and low-frequency noise carried out
Filter；The impedance composite muffler is simple in structure, can effectively reduce the exhaust resistance of automobile exhaust pipe.
The utility model adopts the following technical solution：
A kind of coaxial impedance complex muffler, including noise enter pipe, expansion chambers, the first resonant cavity, the second resonant cavity
With noise outlet pipe, noise is communicated in the noise by the exhaust pipe of automobile and enters pipe, the noise enter pipe be communicated in it is described
Expansion chambers, the expansion chambers are communicated in first resonant cavity, and first resonant cavity is communicated in second resonant cavity, described
Second resonant cavity is communicated in the noise outlet pipe, the noise enter the caliber of pipe and the noise outlet pipe with the automobile
The caliber of exhaust pipe is identical, and the inner wall of the expansion chambers adheres to vibration-absorbing material layer, and the outer diameter of the expansion chambers is more than the noise
Into the outer diameter of pipe.
Further, first resonant cavity is annular housing, and the inner wall of first resonant cavity is funnel-shaped structure
The big opening end of noisy channel, the funnel-shaped structure is communicated in the expansion chambers, and the small open end of the funnel-shaped structure connects
Second resonant cavity is passed through, several micropores are offered on the surface of first resonant cavity, wherein first resonant cavity
Outer diameter is identical as the outer diameter of the expansion chambers.
Further, the outer diameter of second resonant cavity is identical as the outer diameter of the first resonant cavity, second resonance
The inner wall of chamber adheres to vibration-absorbing material layer.
Further, the material of first resonant cavity is aluminium foil, and several different rule are placed on the surface of the aluminium foil
The micropore of lattice, the aperture of the micropore is in 0.5-1mm.
Further, it is sound-absorbing porous material that the noise, which enters pipe and the pipe wall material of the noise outlet pipe,.
Further, the material of the expansion chamber interior walls is organic fibrous material.
Compared with prior art, the beneficial effects of the utility model are：
Coaxial impedance complex muffler described in the utility model enters pipe, expansion chambers, by being equipped with noise
One resonant cavity, the second resonant cavity and noise outlet pipe enable the coaxial impedance complex muffler effectively in noise
High-frequency noise and low-frequency noise are filtered.
Description of the drawings
Fig. 1 is the schematic diagram of coaxial impedance complex muffler described in the utility model.
Wherein, reference numeral is as follows：
1- noises enter pipe, 2- expansion chambers, the first resonant cavities of 3-, the second resonant cavities of 4-, 5- noise outlet pipes.
Specific implementation mode
In the following with reference to the drawings and specific embodiments, the utility model is further described.
Embodiment 1
As shown in Figure 1, a kind of coaxial impedance complex muffler, including noise enter pipe 1, expansion chambers 2, the first resonant cavity
3, the second resonant cavity 4 and noise outlet pipe 5, noise are communicated in the noise by the exhaust pipe (not shown) of automobile and enter pipe 1,
The noise enters pipe 1 and is communicated in the expansion chambers 2, and the expansion chambers 2 are communicated in first resonant cavity 3, and described first is total
The chamber 3 that shakes is communicated in second resonant cavity 4, and second resonant cavity 4 is communicated in the noise outlet pipe 5, and the noise enters pipe 1
Identical as the caliber of the exhaust pipe of the automobile with the caliber of the noise outlet pipe 5, the inner wall of the expansion chambers 2 adheres to absorbing
The outer diameter of material layer (not shown), the expansion chambers 2 is more than the outer diameter that the noise enters pipe 1.
Wherein, the noise enters the pipe of the exhaust pipe of the caliber of pipe 1, the caliber of the noise outlet pipe 5 and the automobile
Diameter refers to internal diameter.
First resonant cavity 3 is annular housing, and the inner wall of first resonant cavity 3 is logical for the noise of funnel-shaped structure
The big opening end in road, the funnel-shaped structure is communicated in the expansion chambers 2, and the small open end of the funnel-shaped structure is communicated in institute
The second resonant cavity 4 is stated, several micropore (not shown) are offered on the surface of first resonant cavity 3, wherein described first is total
Shake chamber 3 outer diameter it is identical as the outer diameter of the expansion chambers 2.
The outer diameter of second resonant cavity 4 is identical as the outer diameter of first resonant cavity 3, second resonant cavity 4 it is interior
Wall adheres to vibration-absorbing material layer (not shown).
The material of first resonant cavity 3 is aluminium foil, and the micropore of several different sizes is placed on the surface of the aluminium foil,
The aperture of the micropore is in 0.5-1mm.
It is sound-absorbing porous material that the noise, which enters pipe 1 and the pipe wall material of the noise outlet pipe 5,.
The material of 2 inner wall of the expansion chambers is organic fibrous material.
The application process of coaxial impedance complex muffler described in the utility model is as follows：
Coaxial impedance complex muffler described in the utility model can be mounted on the discharge duct of bottom of car, in vapour
In the process of running, structural vibration noise and radiated noise of motor vehicle exhaust emission etc. will pass vehicle inside automobile exhaust pipeline
It broadcasts, when noise, which reaches the noise, enters pipe 1, noise will will be entered pipe 1 by noise in pipeline flow process and enter expansion
Room 2 is opened, due to the vibration-absorbing material that 2 inner wall of expansion chambers uses, noise enters pipe 1 and uses sound-absorbing porous material, the high frequency in noise
Noise is filtered, and then noise passes through inner wall for the first resonant cavity 3 of funnel-shaped structure, and aluminium foil is micro- on the first resonant cavity 3
Hole can absorb the energy of noise, achieve the purpose that reduce low frequency noise, next, noise is further by the second resonant cavity 4
Reduction noise.
The utility model is not limited to the above embodiment, without departing substantially from the utility model in essence content, this
Any deformation, improvement, the replacement that field technology personnel are contemplated that each fall within the scope of protection of the utility model.
Claims (6)
1. a kind of coaxial impedance complex muffler, including noise enter pipe, expansion chambers, the first resonant cavity, the second resonant cavity and
Noise outlet pipe, which is characterized in that noise is communicated in the noise by the exhaust pipe of automobile and enters pipe, and the noise enters Guan Lian
The expansion chambers are passed through, the expansion chambers are communicated in first resonant cavity, and it is total that first resonant cavity is communicated in described second
Shake chamber, and second resonant cavity is communicated in the noise outlet pipe, the noise enter the caliber of pipe and the noise outlet pipe with
The caliber of the exhaust pipe of the automobile is identical, and the inner wall of the expansion chambers adheres to vibration-absorbing material layer, and the outer diameter of the expansion chambers is big
Enter the outer diameter of pipe in the noise.
2. coaxial impedance complex muffler according to claim 1, which is characterized in that first resonant cavity is annular
Cavity, the inner wall of first resonant cavity are the noisy channel of funnel-shaped structure, the big opening end connection of the funnel-shaped structure
It is communicated in second resonant cavity, the table of first resonant cavity in the small open end of the expansion chambers, the funnel-shaped structure
Several micropores are offered on face, wherein the outer diameter of first resonant cavity is identical as the outer diameter of the expansion chambers.
3. coaxial impedance complex muffler according to claim 1, which is characterized in that the outer diameter of second resonant cavity
Identical as the outer diameter of the first resonant cavity, the inner wall of second resonant cavity adheres to vibration-absorbing material layer.
4. coaxial impedance complex muffler according to claim 2, which is characterized in that the material of first resonant cavity
For aluminium foil, the micropore of several different sizes is placed on the surface of the aluminium foil, the aperture of the micropore is in 0.5-1mm.
5. coaxial impedance complex muffler according to claim 1, which is characterized in that the noise enters pipe and described
The pipe wall material of noise outlet pipe is sound-absorbing porous material.
6. coaxial impedance complex muffler according to claim 1, which is characterized in that the material of the expansion chamber interior walls
For organic fibrous material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820144693.5U CN207776932U (en) | 2018-01-26 | 2018-01-26 | A kind of coaxial impedance complex muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820144693.5U CN207776932U (en) | 2018-01-26 | 2018-01-26 | A kind of coaxial impedance complex muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207776932U true CN207776932U (en) | 2018-08-28 |
Family
ID=63210784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820144693.5U Expired - Fee Related CN207776932U (en) | 2018-01-26 | 2018-01-26 | A kind of coaxial impedance complex muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207776932U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673648A (en) * | 2022-04-11 | 2022-06-28 | 芜湖欧宝机电有限公司 | Compressor silencer and manufacturing process thereof |
-
2018
- 2018-01-26 CN CN201820144693.5U patent/CN207776932U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673648A (en) * | 2022-04-11 | 2022-06-28 | 芜湖欧宝机电有限公司 | Compressor silencer and manufacturing process thereof |
| CN114673648B (en) * | 2022-04-11 | 2023-11-14 | 芜湖欧宝机电有限公司 | Compressor muffler and manufacturing process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2921306Y (en) | Impedance composite noise silencer | |
| CN106468197B (en) | A kind of wideband noise-reducing silencer | |
| CN105351037A (en) | Small-hole high-frequency noise eliminator | |
| CN205654400U (en) | Silencer | |
| CN206111279U (en) | Car premuffler structure | |
| CN207776932U (en) | A kind of coaxial impedance complex muffler | |
| CN208089373U (en) | A kind of eco-friendly car noise absorber | |
| CN106321193A (en) | Rear silencer of sedan | |
| CN204716362U (en) | Engineering machinery noise-reducing silencer | |
| CN205330766U (en) | Aperture high frequency silencer | |
| CN201818348U (en) | Hydraulic muffler for excavator | |
| CN201934169U (en) | Exhaust silencer of diesel engine | |
| CN206158820U (en) | Impedance combined silencer | |
| CN206487543U (en) | A kind of diesel-driven generator exhaust silencer system | |
| CN204082266U (en) | A kind of automobile sound absorber assembly | |
| CN206338099U (en) | A kind of wideband noise-reducing silencer | |
| CN204783176U (en) | Light truck muffler | |
| CN205225522U (en) | Engine and noise eliminator | |
| CN206617214U (en) | A kind of exhaust silencer of pair of tail pipe | |
| CN104329139A (en) | Silencer of motorcycle exhausting system | |
| CN207864025U (en) | A kind of silencer | |
| CN208431056U (en) | A kind of exhaust pipe with circuitous configuration | |
| CN208220865U (en) | A kind of multiple reflection double resonance composite muffler | |
| CN206267916U (en) | Automobile main muffler | |
| CN207686792U (en) | A kind of automobile-used impedance composite clampshell silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180828 |