CN1474041A - Multiple independent serial silencers - Google Patents
Multiple independent serial silencers Download PDFInfo
- Publication number
- CN1474041A CN1474041A CNA021363935A CN02136393A CN1474041A CN 1474041 A CN1474041 A CN 1474041A CN A021363935 A CNA021363935 A CN A021363935A CN 02136393 A CN02136393 A CN 02136393A CN 1474041 A CN1474041 A CN 1474041A
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- China
- Prior art keywords
- independently
- series connection
- cavity
- dividing plate
- bafflers
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- Exhaust Silencers (AREA)
Abstract
The present invention discloses silencer for the exhaust unit of engine. The silencer consists of casing, cavities, air admission pipe, air exhaust pipe and vortex filters. Inside the casing, there are cavities at two ends, cavities and vortex filters separated via partition board with small hole communicated with the vortex pipe inside the filter. Of the silencer, several independent silencer units are connected serially, and while the independent silencer units are installed, the U-shaped partition board is toward the air admission pipe while the planar partition board is toward the air exhaust pipe. Inside the cavities, there is sound absorbing material set near the casing. The present invention can lower the noise of the engine, and reduce the back pressure and power loss of the engine, and has simple structure and high silencing effect.
Description
Technical field
The present invention relates to the silencer for gas flow or the venting gas appliance that belong to the automobile internal motor, particularly have two or more independently muffler assemblies of series connection.
Background technique
At present both at home and abroad engine exhaust baffler kind, model are various, but divide from working principle, can be divided into anti-altogether formula and resonant two classes mostly.Altogether anti-formula class muffler is difficult to solve to inserting loss when having relatively high expectations, and motor produces high back pressure simultaneously, thereby increases the contradiction of oil consumption and power loss.Though resonant muffler can overcome the problem that produces high back pressure, when requiring to improve baffler insertion loss, must increase the volume of resonant chamber, this has just brought restriction to the design of product.Chinese patent CN2069925U for example, this is a kind of resonant muffler, is made up of suction tude, outlet pipe, shell etc., is equiped with several spherical hollow spaces in the shell, each spherical hollow space is connected with each other logical by vortex tube.Be laid with several small sircle holes on half area of each spherical hollow space.The shortcoming of this silencing apparatus is bigger to the exhaust back pressure of motor, and is big to engine power loss, and volume is big too.
Summary of the invention
The purpose of this invention is to provide a kind of volume little, noise can be decayed significantly, can reduce simultaneously the engine exhaust back pressure, reduce the engine power loss, and can dismantle the filter exhaust baffler of being convenient to clean.
The objective of the invention is to realize in the following manner, in the shell of baffler of the present invention, a plurality of independently eddy current wave filter are in series, and each wave filter is by dividing plate, vortex tube, and the U-shaped dividing plate is formed.On the dividing plate and U-shaped dividing plate of each eddy current wave filter, distributing about 9 macropores and a plurality of aperture, the welding of each macropore and vortex tube, dividing plate and U-shaped dividing plate have finally been formed an eddy current wave filter by the welding of vortex tube.After above-mentioned such Togo had independently the baffler series connection, be contained in the housing of baffler.Have a plurality of independently cavity, suction tude, outlet pipe 5, the exhaust cover plates 12 of the baffler of series connection of the present invention have been formed.Two ends are cavity in the housing, and the centre separates with dividing plate, the throttle chamber that is crisscross arranged successively, cavity, and cavity is filled with getter material near housing section.
Of the present invention have a plurality of independently the series connection bafflers, because having a plurality of independently eddy current wave filter is in series, and, silencing apparatus is a demountable structure, therefore manufacturing process is good, and volume is little, and noise can be decayed significantly, while can be reduced engine exhaust back pressure, the loss of minimizing engine power, the advantage of being convenient to clean.
Description of drawings
Fig. 1 be the present invention have a plurality of independently the series connection bafflers always scheme.
Fig. 2 is an eddy current wave filter assembly of the present invention.
Fig. 3 is the large and small pore size distribution figure on the eddy current wave filter flat board of the present invention.
Among the figure, the 1st, suction tude, the 2nd, cavity, the 3rd, eddy current wave filter, the 4th, sound-absorbing material, the 5th, outlet pipe, the 6th, vortex tube, 7 dividing plates, the 8th, U-shaped dividing plate, the 9th, macropore, the 10th, aperture, the 11st, rivet, the 12nd, exhaust cover plate.
Embodiment
Structure and function to invention is described in detail with reference to the accompanying drawings: with reference to accompanying drawing 1, and the present invention be crisscross arranged successively cavity 2, eddy current wave filter 3, exhaust partition 12, exhaust partition 12 is by rivet 11 and silencer casing riveted joint of the present invention.Have large and small hole on the dividing plate 7, cavity is filled with sound absorbing material 4 near housing section.The eddy current wave filter is made up of the parallel vortex tube 8 of 8 on two dividing plates 7 and U-shaped dividing plate that places.But vortex tube 8 embeddings or be welded on the macropore of dividing plate 7, and communicate with macropore.
After sound absorbing material 4 imports first order cavity 2 into, promptly propagate forward from suction tude 1 when the noise of engine emission, reach eddy current wave filter 3 by dividing plate 7 along larger area cross section in the cavity.Learn the performance of wave filter 3 according to the eddy current sound, the sound wave that is lower than the minimum analog frequency of vortex tube in the noise is subjected to very big damping can not be passed through, thereby make the following sound wave of cutoff frequency when the end of the vortex tube 8 by eddy current wave filter 3, thereby sound can also be decayed owing to the transition of transfer impedance produces reflected wave.Aperture on the dividing plate 7 also has the function of noise attenuation.
Cavity 2 of the present invention is the sound-absorption coefficients that increase the baffler inwall near the effect of housing 1 partially filled sound absorbing material 4, with the sound energy of decaying better.The waste gas of engine emission enters this device from suction tude, it can successfully pass through the vortex tube 8 of cavity 2 and eddy current wave filter 3 point-blank successively along axis, the suffered resistance of waste gas current stabilization significantly reduces like this, thereby has reduced the motor high back pressure, has improved the operating mode of motor.
By design of the present invention, every grade of eddy current wave filter can make sound attenuation 15～20db.
The present invention can be according to motor dissimilar, the eddy current wave filter of different progression is selected in and the different requirements of discharging waste gas noise, and the radical of vortex tube, length.Of the present invention member adopts cold rolling thin slice to make through punch process, and sound absorbing material adopts the sound absorbing material commonly used with non-flame property.
Exhaust noise silencing of the present invention is effective, power loss is little.Through relevant measuring and calculating, the present invention can make baffler insert loss L1L up to more than the 50db, and power loss ratio LN% only is about 1.5%, far below 5%～7% of requirement promulgated by the ministries or commissions of the Central Government.The present invention is simple in structure, is the ideal product of engine exhaust noise reduction.
Claims (5)
1. have a plurality of independently bafflers of series connection, form by housing (13), cavity (2), suction tude (5), outlet pipe (6), it is characterized in that: two ends are that cavity (2), the middle dividing plate (7) of using separate in the housing, eddy current wave filter (3), cavity (2) successively are crisscross arranged, dividing plate has large and small hole on (7), and cavity is filled with sound-absorbing material (4) near housing section.
2. according to claim 1 have a plurality of independently the series connection bafflers, it is characterized in that: high-pass filter (3) places the breathing pipe (8) between two dividing plates (7) to form by parallel, breathing pipe (8) but embedding or be welded on the macropore of dividing plate (7) and communicate with macropore.
3. according to claim 2 have a plurality of independently bafflers of series connection, and it is characterized in that: sound-absorbing material (4) is for having the sound-absorbing material of non-flame property.
4. according to claim 3 have a plurality of independently bafflers of series connection, and it is characterized in that: a plurality of independently baffler U-shaped dividing plates of series connection are placed towards suction tude, and dividing plate is placed and is in series towards the outlet pipe direction.
5. according to claim 4 have a plurality of independently the series connection bafflers, it is characterized in that: each member of silencing apparatus adopts cold rolling thin slice to make through punch process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021363935A CN1474041A (en) | 2002-08-06 | 2002-08-06 | Multiple independent serial silencers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021363935A CN1474041A (en) | 2002-08-06 | 2002-08-06 | Multiple independent serial silencers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1474041A true CN1474041A (en) | 2004-02-11 |
Family
ID=34146444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021363935A Pending CN1474041A (en) | 2002-08-06 | 2002-08-06 | Multiple independent serial silencers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1474041A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010048794A1 (en) * | 2008-10-31 | 2010-05-06 | 李静 | A vehicle muffler with reducing exhaust gas |
| CN105444324A (en) * | 2015-12-11 | 2016-03-30 | 凯天环保科技股份有限公司 | Combined type air treatment unit |
| CN106677860A (en) * | 2017-03-22 | 2017-05-17 | 苏州亮磊知识产权运营有限公司 | Silencer for automobile exhaust pipe |
| CN108591016A (en) * | 2018-03-13 | 2018-09-28 | 北京化工大学 | A kind of multipurpose pulsation dampening of replaceable internals |
-
2002
- 2002-08-06 CN CNA021363935A patent/CN1474041A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010048794A1 (en) * | 2008-10-31 | 2010-05-06 | 李静 | A vehicle muffler with reducing exhaust gas |
| CN105444324A (en) * | 2015-12-11 | 2016-03-30 | 凯天环保科技股份有限公司 | Combined type air treatment unit |
| CN106677860A (en) * | 2017-03-22 | 2017-05-17 | 苏州亮磊知识产权运营有限公司 | Silencer for automobile exhaust pipe |
| CN108591016A (en) * | 2018-03-13 | 2018-09-28 | 北京化工大学 | A kind of multipurpose pulsation dampening of replaceable internals |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |