CN204716343U - Impedance complex formula rear muffler - Google Patents
Impedance complex formula rear muffler Download PDFInfo
- Publication number
- CN204716343U CN204716343U CN201520211563.5U CN201520211563U CN204716343U CN 204716343 U CN204716343 U CN 204716343U CN 201520211563 U CN201520211563 U CN 201520211563U CN 204716343 U CN204716343 U CN 204716343U
- Authority
- CN
- China
- Prior art keywords
- cavity
- tube
- communicated
- pipe
- preposition
- 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
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a kind of impedance complex formula rear muffler, its supplying tube, by collateral branch's pipe and the second cavity connects, reaches resonant silencing effect, and resonant silencing frequency is determined by the length of collateral branch's pipe and caliber, and this kind of mode can obtain lower resonant frequency; And resistive noise reduction is carried out before and after the resonant silencing effect of supplying tube, improve the second order low-frequency noise of exhaust sound significantly.
Description
Technical field
The utility model relates to a kind of auto-parts technical field, and more particularly, it relates to a kind of impedance complex formula rear muffler.
Background technique
Silencing apparatus is as the critical component reducing automobile engine to exhaust noise, and it carrys out stress release treatment by reducing, decaying exhaust gas pulses pressure.
Silencing apparatus can be divided into front hush tube and rear hush tube; Usually in having started, front hush pipe and rear hush pipe are used in combination.
Disclose a kind of existing rear hush pipe structure in FIG, it comprises the supplying tube 01 be placed in shell, and supplying tube one end is communicated with outside, and the other end is successively by exporting outside to after U-tube 02 and output tube 03; Between shell and aforesaid all pipelines, be filled with acoustical cotton, U-tube 02 and output tube 03 offer aperture group and is used for and silencing cotton cooperation formation impedance composite baffler, its erasure effect is not fine.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of impedance complex formula rear muffler that significantly can improve the second order low-frequency noise of tail gas.
For achieving the above object, the utility model provides following technological scheme:
A kind of impedance complex formula rear muffler, comprises shell,
Described shell forms the first cavity, the second cavity and the 3rd cavity that connect successively by dividing plate, be all filled with silencing cotton in described first cavity and the second cavity;
Described first cavity is built-in with preposition pipe and rearmounted pipe, and described second cavity is built-in with supplying tube and output tube, and described 3rd cavity is built-in with U-tube;
Described first cavity offers inlet hole and air outlet hole, and described inlet hole is successively by being communicated to described air outlet hole after preposition pipe, supplying tube, U-tube, output tube and rearmounted pipe;
Wherein, one end of described preposition pipe is communicated to inlet hole, and the other end is closed, and on its tube wall, be provided with preposition hole group;
And one end of described supplying tube is communicated to the tube wall of preposition pipe, and the other end is communicated to U-shaped hole, and is communicated to the second cavity at its tube wall by collateral branch's pipe;
And described U-tube is communicated to output tube relative to the other end of supplying tube, and on its tube wall, be provided with U-shaped hole group;
And described output tube is communicated with air outlet hole relative to the other end of U-tube by rearmounted pipe, and is provided with noise-reducing structure on its tube wall.
Preferably, described second cavity comprises left cavity and right cavity, and described collateral branch's pipe one end is communicated to the tube wall of supplying tube, and the other end is communicated to right cavity through after left cavity.
Preferably, described noise-reducing structure comprises silencing board and delivery outlet group, the sidewall of described silencing board and described output tube forms resistive sealed cavity, and the internal duct of described output tube is communicated to resistive sealed cavity by delivery outlet group, is filled with silencing cotton in described resistive sealed cavity
Compared with prior art, supplying tube of the present utility model, by collateral branch's pipe and the second cavity connects, reaches resonant silencing effect, and resonant silencing frequency is determined by the length of collateral branch's pipe and caliber, and this kind of mode can obtain lower resonant frequency; And resistive noise reduction is carried out before and after the resonant silencing effect of supplying tube, improve the second order low-frequency noise of exhaust sound significantly.
Accompanying drawing explanation
Fig. 1 is a kind of existing rear hush pipe structural drawing;
Fig. 2 is the cut-away view of the utility model impedance complex formula rear muffler embodiment.
Accompanying drawing marks: 1, the first cavity; 2, the second cavity; 21, left cavity; 22, right cavity; 3, the 3rd cavity; 4, preposition pipe; 41, preposition hole group; 5, supplying tube; 51, collateral branch's pipe; 6, U-tube; 61, U-shaped hole group; 7, output tube; 71, delivery outlet group; 72, silencing board; 73, resistive sealed cavity.
Embodiment
With reference to Fig. 2, the utility model impedance complex formula rear muffler embodiment is described further.
Present embodiment discloses a kind of impedance complex formula rear muffler, it comprises shell, and shell forms the first cavity 1, second cavity 2 and the 3rd cavity 3 by two pieces of dividing plates; Meanwhile, in the first cavity 1 and the 3rd cavity 3, be all filled with silencing cotton, the silencing cotton of the present embodiment selects terylene needled felt as stuffing.
First cavity 1 offers inlet hole, and the one end being positioned at the preposition pipe 4 of the first cavity 1 inside is connected with inlet hole, and the other end shutoff is got up, and on its tube wall, offer preposition hole group 41; Moreover what the supplying tube 5 being positioned at the second cavity 2 sealed is communicated with on the tube wall of preposition pipe 4 through after dividing plate.
So, by above-mentioned design, the preposition hole group 41 of the present embodiment forms the first resistive noise-reducing structure with the silencing cotton being positioned at the first cavity 1, namely after the waste gas entered by inlet hole enters to the acoustical cotton of the first cavity 1 by preposition hole group 41, high frequency noise in waste gas can rub in the gap of silencing cotton, convert its acoustic energy to heat energy and consume, reaching the object of elimination waste gas medium-high frequency noise; Again the waste gas of elimination high frequency noise is fed through in supplying tube 5.
The supplying tube 5 of the present embodiment is communicated in the second cavity 2 by collateral branch's pipe 51; So, collateral branch's pipe 51 and the second cavity 2 form resonance silencing cavity; After the waste gas entering supplying tube 5 enters to the second cavity 2 by collateral branch's pipe 51, air column in sound wave in waste gas and the second cavity 2 produces and vibrates, during vibration and the interior wall friction of the second cavity 2 make a part of acoustic energy convert thermal energy consumption to fall, there is reflection and interference phenomenon in acoustic energy simultaneously, cause its sound energy attenuation, reach the object eliminating acoustic energy.Because in air column and waste gas, the resonant frequency of sound wave is lower, therefore the resonance silencing cavity of the present embodiment is mainly in order to eliminate the low frequency noise in waste gas.
In addition, the second cavity 2 of this enforcement is divided into left cavity 21 and right cavity 22 by dividing plate, and one end of collateral branch's pipe 51 is communicated to right cavity 22, and the other end is communicated to supplying tube 5 through left cavity 21; So, being positioned at length and its caliber of left cavity 21 by changing collateral branch's pipe 51, can regulating resonance noise reduction frequency.
The U-tube 6 that the present embodiment is arranged in the 3rd cavity 3 is communicated with supplying tube 5, enters in U-tube 6 by the waste gas of supplying tube 5; The U-shaped hole group 61 be opened on U-tube 6 tube wall forms the second resistive noise-reducing structure with the acoustical cotton being arranged in the 3rd cavity 3; It acts on consistent with first of this enforcement the resistive noise-reducing structure, then do not elaborate herein; And select the main purpose of U-tube 6 to be to reduce the drag losses of supplying tube 5 and output tube 7 UNICOM herein.
In addition, the output tube 7 of the present embodiment is communicated with air outlet hole relative to the other end of U-tube 6 by rearmounted pipe, and is provided with noise-reducing structure on its tube wall; So, after waste gas is by aforesaid first resistive noise-reducing structure, resonance silencing cavity and the second resistive noise-reducing structure, its high and low frequency has obtained effective filtering all; Then noise-reducing structure herein can select its concrete structure according to high and low frequency noise remaining in the waste gas noise in fact obtained, so that it is more flexible to remove noise, effect is more comprehensive.
Preferably, the noise-reducing structure of this enforcement comprises silencing board 72 and delivery outlet group 71, silencing board 72 forms resistive sealed cavity 73 with the sidewall of output tube 7, and the internal duct of output tube 7 is communicated to resistive sealed cavity 73 by delivery outlet group 71, is filled with silencing cotton in resistive sealed cavity 73; Above-mentioned resistive sealed cavity 73, delivery outlet group 71 and silencing cotton constitute in fact the 3rd resistive noise-reducing structure, with the height in removal waste gas further, intermediate frequency noise.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1.
a kind of impedance complex formula rear muffler, comprises shell, it is characterized in that,
Described shell forms the first cavity, the second cavity and the 3rd cavity that connect successively by dividing plate, be all filled with silencing cotton in described first cavity and the second cavity;
Described first cavity is built-in with preposition pipe and rearmounted pipe, and described second cavity is built-in with supplying tube and output tube, and described 3rd cavity is built-in with U-tube;
Described first cavity offers inlet hole and air outlet hole, and described inlet hole is successively by being communicated to described air outlet hole after preposition pipe, supplying tube, U-tube, output tube and rearmounted pipe;
Wherein, one end of described preposition pipe is communicated to inlet hole, and the other end is closed, and on its tube wall, be provided with preposition hole group;
And one end of described supplying tube is communicated to the tube wall of preposition pipe, and the other end is communicated to U-shaped hole, and its tube wall is communicated to the second cavity by collateral branch's pipe;
And described U-tube is communicated to output tube relative to the other end of supplying tube, and on its tube wall, be provided with U-shaped hole group;
And described output tube is communicated with air outlet hole relative to the other end of U-tube by rearmounted pipe, and is provided with noise-reducing structure on its tube wall.
2.
impedance complex formula rear muffler according to claim 1, it is characterized in that, described second cavity comprises left cavity and right cavity, described collateral branch's pipe one end is communicated to the tube wall of supplying tube, and the other end is communicated to right cavity through after left cavity.
3.
impedance complex formula rear muffler according to claim 1, it is characterized in that, described noise-reducing structure comprises silencing board and delivery outlet group, the sidewall of described silencing board and described output tube forms resistive sealed cavity, the internal duct of described output tube is communicated to resistive sealed cavity by delivery outlet group, is filled with silencing cotton in described resistive sealed cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520211563.5U CN204716343U (en) | 2015-04-09 | 2015-04-09 | Impedance complex formula rear muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520211563.5U CN204716343U (en) | 2015-04-09 | 2015-04-09 | Impedance complex formula rear muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204716343U true CN204716343U (en) | 2015-10-21 |
Family
ID=54315346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520211563.5U Expired - Fee Related CN204716343U (en) | 2015-04-09 | 2015-04-09 | Impedance complex formula rear muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204716343U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888775A (en) * | 2016-05-31 | 2016-08-24 | 清华大学苏州汽车研究院（相城） | Automobile exhausting silencer |
-
2015
- 2015-04-09 CN CN201520211563.5U patent/CN204716343U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888775A (en) * | 2016-05-31 | 2016-08-24 | 清华大学苏州汽车研究院（相城） | Automobile exhausting silencer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201367931Y (en) | Impedance composite high-efficient engine muffler | |
| CN204163804U (en) | Automobile exhaust pipe baffler | |
| CN106468197A (en) | A kind of wideband noise-reducing silencer | |
| CN205559018U (en) | Vehicle vent -pipe muffler | |
| CN204729151U (en) | A kind of automotive muffler | |
| CN204716343U (en) | Impedance complex formula rear muffler | |
| CN204716335U (en) | A kind of silencing apparatus for the exhaust of small displacement compact type | |
| CN201934169U (en) | Exhaust silencer of diesel engine | |
| CN204371592U (en) | Natural gas compressor silencer and there is the natural gas compressor of this silencer | |
| CN204716332U (en) | Impedance composite muffler | |
| CN202348376U (en) | Mesh-shaped inner cylinder silencer | |
| CN201818348U (en) | Hydraulic muffler for excavator | |
| CN204716347U (en) | Five chamber reactive mufflers | |
| CN204716339U (en) | The silencing apparatus of compact type exhaust | |
| CN204691874U (en) | Novel automobile exhaust pipe | |
| CN203067061U (en) | Gasoline engine exhaust silencer | |
| CN206917701U (en) | Exhaust silencer and gas extraction system | |
| CN204783176U (en) | Light truck muffler | |
| CN204716336U (en) | Shift frequency baffler | |
| CN202209198U (en) | Silencer with built-in air inlet tube | |
| CN204436545U (en) | Light truck muffler for internal combustion engine | |
| CN204716363U (en) | After silencer | |
| CN205154328U (en) | A silencer for taking two exhaust structure of T engine | |
| CN208885364U (en) | A kind of high-efficient noise-reducing muffler | |
| CN203476442U (en) | Horizontally-mounted silencer |
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: 20151021 Termination date: 20170409 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |