CN201074537Y - Silencer - Google Patents
Silencer Download PDFInfo
- Publication number
- CN201074537Y CN201074537Y CNU2007200811914U CN200720081191U CN201074537Y CN 201074537 Y CN201074537 Y CN 201074537Y CN U2007200811914 U CNU2007200811914 U CN U2007200811914U CN 200720081191 U CN200720081191 U CN 200720081191U CN 201074537 Y CN201074537 Y CN 201074537Y
- Authority
- CN
- China
- Prior art keywords
- noise elimination
- noise
- elimination cavity
- reducing
- cavity
- 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
- 230000003584 silencer Effects 0.000 title 1
- 230000008030 elimination Effects 0.000 claims description 51
- 238000003379 elimination reaction Methods 0.000 claims description 51
- 230000030279 gene silencing Effects 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 4
- 208000002925 dental caries Diseases 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- Exhaust Silencers (AREA)
Abstract
A dissipative muffler relates to a noise-reducing means, in particular to a dissipative muffler for diesel engines, which comprises a main noise-reducing cavity (2), a plurality of auxiliary noise-reducing cavities (3) and a casing (5), wherein the main noise-reducing cavity (2) and the auxiliary noise-reducing cavities (3) are all elliptical-ball shaped, which are located in the inner portion of the casing (5). The auxiliary cavities are distributed around the main noise-reducing cavity (2), an inlet pipe (1) is connected on the main noise-reducing cavity (2), the main noise-reducing cavity (2) and the auxiliary cavities are mutually connected through an outlet pipe, an air gate (4) on the auxiliary noise-reducing cavity is communicated with a sound insulating board (5) on the inner walls of a casing (7), and an exhaust vent (6) is arranged on the casing (5). The utility model has the advantages of simple structure, easy making, low cost and favorable noise-reducing effect.
Description
Technical field
The utility model relates to a kind of silencing equipment, particularly a kind of gas silencing apparatus that is used for internal-combustion engine.
Background technique
In the prior art, the silencing apparatus that is connected on the internal-combustion engine generally comprises housing, housing one end is a suction port, the other end is in the air outlet, the centre is provided with expansion chamber, is used for to the waste gas step-down of discharging, usually, from suction port one air inlet pipeline inwardly is set, be distributed with a plurality of holes at Qi Bishang, when air-flow is discharged from Kong Zhongxiang, significantly expand, realize step-down, simultaneously, between expansion chamber and outlet tail piece import, dividing plate is set, to reduce the transmission of sound, in order to improve acoustic attenuation performance, can consider to prolong the length of tail pipe.Because the method that said structure adopts is because of impacting and the isolation of sound is carried out in expansion after sounding, and is difficult to the noise elimination effect that reaches desirable.
The model utility content
The purpose of this utility model provides a kind of silencing apparatus.The utility model has solved the unfavorable problem of existing silencing apparatus noise elimination effect.
Silencing apparatus of the present utility model, comprise main noise elimination cavity 2, secondary noise elimination cavity 3 and housing 7, main noise elimination cavity 2 and secondary noise elimination cavity 3 are oval spherical, main noise elimination cavity 2 and secondary noise elimination cavity 3 are positioned at housing 7 inside, secondary noise elimination cavity 3 be distributed in main noise elimination cavity 2 around, be connected with suction tude 1 on the main noise elimination cavity 2, link to each other by a steam outlet pipe between main noise elimination cavity 2 and each secondary noise elimination cavity 3, air outlet hole 4 on the secondary noise elimination cavity 3 leads to the insulation board 5 on housing 7 inwalls, and housing 7 is provided with exhaust port 6.
The utility model noise-cancelling theory explanation: the utility model silencing apparatus has main noise elimination cavity 2 and secondary noise elimination cavity 3, and insulation board 5 is arranged in the housing 7.Because sound is to propagate with the form of ripple in air.When running into obstacle, just sound wave will be reflected.And in ellipsoid, its reflection will gather focus Q, reaches to offset and reaches noise elimination owing to direction makes it energy on the contrary again.When the sound flow ipe, make waste and old gas band residual sound through repeatedly noise elimination and enter main muffler. when sound is delivered in the main ellipse, gather focus Q and make it to weaken through reflection.And waste gas vent from the side flows away, flow in the secondary ellipse after, in secondary ellipse, pass through oval noise elimination once more.Waste gas then flows away through vent, makes it to reach further noise elimination.After flowing out vent, pass through energy offset once more.Reach the purpose of noise elimination, after the waste gas that flows out and sound pass through soundproof material once more, and eliminate sound.Waste gas arrives shell through soundproof material at last. and under the effect of circular hole formula exhaust port, waste gas is discharged thereby isolate sound. therefore also reach the purpose of final noise elimination.
The utlity model has simple in structure, be convenient to make, cost is low, the effective advantage of eliminating the noise.
Description of drawings
Fig. 1 is the utility model embodiment one a sectional view,
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and with illustrated embodiments the utility model is done detailed explanation.
The silencing apparatus of present embodiment, comprise main noise elimination cavity 2, secondary noise elimination cavity 3 and housing 7, main noise elimination cavity 2 and secondary noise elimination cavity 3 are oval spherical, main noise elimination cavity 2 and secondary noise elimination cavity 3 are positioned at housing 7 inside, secondary noise elimination cavity 3 be distributed in main noise elimination cavity 2 around, be connected with suction tude 1 on the main noise elimination cavity 2, link to each other by a steam outlet pipe between main noise elimination cavity 2 and each secondary noise elimination cavity 3, air outlet hole 4 on the secondary noise elimination cavity 3 leads to the insulation board 5 on housing 7 inwalls, and housing 7 is provided with exhaust port 6.
When the waste and old gas of combustion in IC engine flows into along with import; The sound of the gas of in-cylinder combustion blast also flows into thereupon. because the airflow line that connects is oval and adopts confocal.Oval inner as long as the sound that sends from a focus will converge to another focus.This is because sound is along rectilinear propagation.After entering pipeline, sound is in divergent state.When it ran into tube wall, it will backspace.Because angle is different, always converges to focus when it reflects, and their opposite sign but equal magnitude.Thereby reach the noise elimination effect.In the suction tude of silencing apparatus, its confocal is: the focus Q1 of first oval focus Q2, second ellipse, circulation mode like this is up to main muffler.In the process of this transmission, reach primary noise elimination. pass through same noise elimination when arriving secondary silencing apparatus once more.Also pass to other several silencing apparatuss simultaneously respectively. in the meantime through twice noise elimination.After noise elimination for the third time, the gas that its is discharged is eliminated the noise once more. again through once soundproof material.When last discharge, adopt circular hole formula tap hole, further eliminated sound wherein.
Claims (1)
1. silencing apparatus, it is characterized in that: comprise a main noise elimination cavity (2), several secondary noise elimination cavitys (3) and a housing (5), main noise elimination cavity (2) and secondary noise elimination cavity (3) are oval spherical, main noise elimination cavity (2) and secondary noise elimination cavity (3) are positioned at housing (5) inside, secondary noise elimination cavity (3) be distributed in main noise elimination cavity (2) around, be connected with suction tude (1) on the main noise elimination cavity (2), link to each other by a steam outlet pipe between main noise elimination cavity (2) and each secondary noise elimination cavity (3), air outlet hole (4) on the secondary noise elimination cavity (3) leads to the insulation board (5) on housing (7) inwall, and housing (5) is provided with exhaust port (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200811914U CN201074537Y (en) | 2007-09-24 | 2007-09-24 | Silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200811914U CN201074537Y (en) | 2007-09-24 | 2007-09-24 | Silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201074537Y true CN201074537Y (en) | 2008-06-18 |
Family
ID=39519800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200811914U Expired - Fee Related CN201074537Y (en) | 2007-09-24 | 2007-09-24 | Silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201074537Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833948A (en) * | 2010-04-14 | 2010-09-15 | 南通杰西电器有限公司 | Dual muffler |
| CN102444447A (en) * | 2011-12-21 | 2012-05-09 | 北京航空航天大学 | Spherical-hemispherical multi-cavity silencer |
| CN105888801A (en) * | 2016-05-16 | 2016-08-24 | 北京汽车股份有限公司 | Exhaust device used for vehicles |
-
2007
- 2007-09-24 CN CNU2007200811914U patent/CN201074537Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833948A (en) * | 2010-04-14 | 2010-09-15 | 南通杰西电器有限公司 | Dual muffler |
| CN101833948B (en) * | 2010-04-14 | 2011-08-17 | 南通杰西电器有限公司 | Dual muffler |
| CN102444447A (en) * | 2011-12-21 | 2012-05-09 | 北京航空航天大学 | Spherical-hemispherical multi-cavity silencer |
| CN105888801A (en) * | 2016-05-16 | 2016-08-24 | 北京汽车股份有限公司 | Exhaust device used for vehicles |
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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: 20080618 |