CN104165083A - Noise reduction device of exhaust pipe - Google Patents
Noise reduction device of exhaust pipe Download PDFInfo
- Publication number
- CN104165083A CN104165083A CN201410099821.5A CN201410099821A CN104165083A CN 104165083 A CN104165083 A CN 104165083A CN 201410099821 A CN201410099821 A CN 201410099821A CN 104165083 A CN104165083 A CN 104165083A
- Authority
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- China
- Prior art keywords
- air
- noise reduction
- flow
- air outlet
- baffle plate
- 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.)
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Links
- 230000009467 reduction Effects 0.000 title abstract description 44
- 239000011148 porous material Substances 0.000 claims description 34
- 230000030279 gene silencing Effects 0.000 claims description 32
- 230000003584 silencer Effects 0.000 claims description 15
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 14
- 229920000742 Cotton Polymers 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract 4
- 238000009423 ventilation Methods 0.000 abstract 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000012216 screening Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a noise reduction device of an exhaust pipe. The noise reduction device of the exhaust pipe comprises a barrel. A noise reduction cavity is formed in the barrel. The two ends of the barrel are provided with an air inlet and an air outlet respectively. Two partition plates and two baffles are installed in the noise reduction cavity sequentially in the direction of the air outlet. A connection pipe penetrates through the upper portions of the two partition plates and penetrates through the lower portions of the two baffles. The lower portion of each partition plate is provided with a plurality of through holes. A plurality of air holes are formed in the upper portion of each baffle. A ventilation pipe is connected between the air outlet and the air inlet and penetrates through the partition plates and the baffles. A pneumatic control valve is arranged at the connecting position between the ventilation pipe and the air inlet. When the flow of air flowing in from the air inlet is small, noise generated by air flow correspondingly is low, the pneumatic control valve is closed directly, the air flow is directly exhausted from the ventilation pipe via the air outlet, the possibility of residual air flow in the noise reduction cavity is decreased, and the service life of the noise reduction device can be prolonged.
Description
Technical field
The present invention relates to a kind of baffler, specifically refer to the silencer of outlet pipe.
Background technique
In urban environment, traffic noise is the pollution sources that radiation is the strongest, impact is the widest.In motor vehicle noise, exhaust sound is one of main noise sound source, and its reduction is mainly by exhaust silencer being installed, must being produced a very large impact motor after fixing a silencer; The power loss of general silencing apparatus, 3% ~ 8%, allows larger power loss when sound deadening capacity is larger; The silencing apparatus of coupling low-powered engine more requires lower power loss.
The car owning amount of China is increasing, and people are no longer only the traffic tool to the requirement of automobile, more require the energy-conserving and environment-protective of car, attractive in appearance and comfortable.The traffic noise of motor vehicle is main sources of urban road noise, will be constantly strict for the legislations for noise of automobile.But in the time of general baffler production and processing, dissipative muffler and the reactive muffler mainly applied on the market at present, can only process high frequency or the noise of medium and low frequency individually, Applicable scope is wideless, and with regard to dissipative muffler: at high temperature, water vapour and sound-absorbing material is had in the gas of corrosive action, the working life of silencing apparatus is short, to low-frequency noise weak effect; Maximum drawback is exactly that silencing apparatus power loss is excessive.
Summary of the invention
The object of the present invention is to provide the silencer of outlet pipe, reduce the infringement of air-flow to baffler, reduce the loss power of silencing apparatus.
Object of the present invention is achieved through the following technical solutions:
The silencer of outlet pipe, comprise cylindrical shell, in described cylindrical shell, be provided with silencing cavity, the two ends of cylindrical shell are respectively arranged with suction port and air outlet, in described silencing cavity, along air outlet direction, two demarcation strips and baffle plate are installed successively, connecting tube runs through the top of two demarcation strips, connecting tube runs through the bottom of two baffle plates, the bottom of demarcation strip is provided with multiple through holes, the top of baffle plate is provided with multiple pores, between described air outlet and suction port, be also connected with breathing pipe, described breathing pipe runs through demarcation strip and baffle plate, be provided with pneumatic control valve at breathing pipe and suction port joint.Traditional silencing apparatus in use, no matter throughput size, air-flow all can pass to carry out noise reduction processing in baffler internal structure, and a small amount of impurity or the corrosive deposit that are blended in air-flow can rest on baffler inside for a long time, can cause certain damage to its internal structure, reduce the power of baffler, when the present invention uses, air-flow is passed in breathing pipe by suction port, the pneumatic control valve that is arranged on suction port place can be controlled according to the size of throughput the flow direction of air-flow, in the time that throughput exceedes certain limit, pneumatic control valve is opened, air-flow is directly entered in the space that first demarcation strip and silencing cavity wall form by suction port, most air-flow enters into the space between second demarcation strip and baffle plate by connecting tube, the air-flow of remainder carries out noise reduction processing to it step by step by the through hole on two demarcation strips, the air-flow being passed into by suction port place enters in larger space environment suddenly in less space environment, only have near the sound wave of the minority frequency of through hole natural frequency to arrive the space between second demarcation strip and baffle plate by through hole, the sound wave of minority frequency can not pass through through hole in addition, can only constantly reflect in the common space forming of demarcation strip and silencing cavity end, until air-flow momentum disappears, complete the noise reduction operation of first stage,
After the noise reduction operation of first stage, the overall momentum of air-flow has been consumed major part, continue to start the noise reduction operation of second stage, and the noise reduction mode of first stage and the noise reduction mode of second stage are similar, the air-flow major part significantly being weakened enters in two connecting tubes between baffle plate, finally discharged by air outlet, near the sound wave of the minority frequency of remainder pore natural frequency could arrive air outlet by pore, the sound wave of minority frequency can not pass through pore in addition, can only constantly reflect in the common space forming of second baffle plate and silencing cavity the other end end, until air-flow momentum disappears, complete the noise reduction operation of second stage, finally reach good noise reduction object, and the part of the air-flow residue minute quantity of process silencing cavity remains in silencing cavity fast, reduce impact or the corrosion of residual fraction air-flow to baffler inside, reduce the loss power of silencing apparatus,
And when the throughput that be flowed into by suction port hour, the noise of the corresponding generation of air-flow is less, and pneumatic control valve directly cuts out, and air-flow directly has breathing pipe to discharge through air outlet, reduce the residual possibility of air-flow in silencing cavity, the working life that is conducive to improve baffler.
Be greater than the diameter near the pore on the baffle plate of air outlet away from the diameter of the pore on the baffle plate of air outlet.Through hole mainly plays the effect of the noise sound wave of screening through hole natural frequency in first stage noise reduction operation, pore is the effect of playing the noise sound wave of screening pore natural frequency in second stage noise reduction operation, after first stage noise reduction operation finishes, enter into the air-flow of second stage noise reduction operation in the time of air passing hole, the frequency spectrum of noise will be shifted to high frequency or ultra-high frequency, audible sound composition in frequency spectrum is obviously reduced, thereby reduce interference and injury to people; The aperture of through hole is greater than the aperture of pore, and both self intrinsic frequency difference can successively be eliminated the sound wave of different frequency, ensures that after airflow passes the present invention, peace and quiet are harmlessly discharged.
The connecting tube mouth of pipe between described demarcation strip is just to pore position.Air-flow major part through first stage noise reduction operation is passed in the spatial joint clearance between the second demarcation strip and first baffle plate by the connecting tube mouth of pipe, the connecting tube mouth of pipe is the position to pore just, the air-flow that makes Rapid Flow cross connecting tube is directly screened by pore, and the connecting tube that remaining air-flow is connected by baffle plate bottom is again discharged, increase the efficiency of pore screening sound wave.
The diameter of described pore is successively decreased along air outlet direction.Second stage noise reduction operation is the final processing to noise sound wave in air-flow, aperture on second baffle plate to suction port to air outlet direction is less than the aperture of first baffle plate, make air-flow be graded again processing, through twice screening of second stage noise reduction operation, can thoroughly ensure that the noise in air-flow is completely eliminated.
Also comprise the silencing cotton that is arranged at cylinder inboard wall.After the noise in air-flow is completely by first stage and second stage noise reduction operation, the sound wave of low and medium frequency is thoroughly processed, remaining high frequency sound wave is absorbed by the numerous spaces on silencing cotton, after constantly transmitting and absorbing, ensures that in air-flow, noise is eliminated completely.
The present invention compared with prior art, has following advantage and beneficial effect:
1, the silencer of outlet pipe of the present invention, when the throughput being flowed into by suction port hour, the noise of the corresponding generation of air-flow is less, pneumatic control valve directly cuts out, air-flow directly has breathing pipe to discharge through air outlet, reduce the residual possibility of air-flow in silencing cavity, the working life that is conducive to improve baffler;
2, the silencer of outlet pipe of the present invention, second stage noise reduction operation is the final processing to noise sound wave in air-flow, aperture on second baffle plate to suction port to air outlet direction is less than the aperture of first baffle plate, make air-flow be graded again processing, through twice screening of second stage noise reduction operation, can thoroughly ensure that the noise in air-flow is completely eliminated.
3, the silencer of outlet pipe of the present invention, after the noise in air-flow is completely by first stage and second stage noise reduction operation, the sound wave of low and medium frequency is thoroughly processed, remaining high frequency sound wave is absorbed by the numerous spaces on silencing cotton, after constantly transmitting and absorbing, ensure that in air-flow, noise is eliminated completely.
Brief description of the drawings
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms the application's a part, does not form the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is structural representation of the present invention;
Mark and corresponding component title in accompanying drawing:
1-cylindrical shell, 2-silencing cavity, 3-suction port, 4-air outlet, 5-demarcation strip, 6-baffle plate, 7-connecting tube, 8-through hole, 9-pore, 10-breathing pipe, 11-pneumatic control valve, 12-silencing cotton.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and exemplary embodiment of the present invention and explanation thereof are only for explaining the present invention, not as a limitation of the invention.
Embodiment 1
As shown in Figure 1, the silencer of outlet pipe of the present invention, comprise cylindrical shell 1, in described cylindrical shell 1, be provided with silencing cavity 2, the two ends of cylindrical shell 1 are respectively arranged with suction port 3 and air outlet 4, along air outlet 4 directions, two demarcation strips 5 and baffle plate 6 are installed successively described silencing cavity 2 is interior, connecting tube 7 runs through the top of two demarcation strips 5, connecting tube 7 runs through the bottom of two baffle plates 6, the bottom of demarcation strip 5 is provided with multiple through holes 8, the top of baffle plate 6 is provided with multiple pores 9, between described air outlet 4 and suction port 3, be also connected with breathing pipe 10, described breathing pipe 10 runs through demarcation strip 5 and baffle plate 6, be provided with pneumatic control valve 11 in breathing pipe 10 and suction port 3 joints, the aperture of described through hole 8 is greater than the diameter of pore 9, connecting tube 7 mouths of pipe between described demarcation strip 5, just to pore 9 positions, are greater than the diameter near the pore 9 on the baffle plate 6 of air outlet 4 away from the diameter of the pore 9 on the baffle plate 6 of air outlet 4, also comprise the silencing cotton 12 that is arranged at cylindrical shell 1 inwall.
When the present invention uses, air-flow is passed in breathing pipe 10 by suction port 3, the pneumatic control valve 11 that is arranged on suction port 3 places can be controlled according to the size of throughput the flow direction of air-flow, in the time that throughput exceedes certain limit, 11 of pneumatic control valves are opened, air-flow is directly entered in the space that first demarcation strip 5 and silencing cavity 2 walls form by suction port 3, most air-flow enters into the space between second demarcation strip 5 and baffle plate 6 by connecting tube 7, the air-flow of remainder carries out noise reduction processing to it step by step by the through hole 8 on two demarcation strips 5, the air-flow being passed into by suction port 3 places enters in larger space environment suddenly in less space environment, only have near the sound wave of the minority frequency of through hole 8 natural frequencys to arrive the space between second demarcation strip 5 and baffle plate 6 by through hole 8, the sound wave of minority frequency can not pass through through hole 8 in addition, can only constantly reflect in the common space forming in demarcation strip 5 and silencing cavity 2 ends, until air-flow momentum disappears, complete the noise reduction operation of first stage,
After the noise reduction operation of first stage, the overall momentum of air-flow has been consumed major part, continue to start the noise reduction operation of second stage, and the noise reduction mode of first stage and the noise reduction mode of second stage are similar, the air-flow major part significantly being weakened enters in two connecting tubes 7 between baffle plate 6, finally discharged by air outlet 4, near the sound wave of the minority frequency of remainder pore 9 natural frequencys could arrive air outlet 4 by pore 9, the sound wave of minority frequency can not pass through pore 9 in addition, can only constantly reflect in the common space forming in second baffle plate 6 and silencing cavity 2 the other end ends, until air-flow momentum disappears, complete the noise reduction operation of second stage, finally reach good noise reduction object, and the part of the air-flow residue minute quantity of process silencing cavity 2 remains in silencing cavity 2 fast, reduce impact or the corrosion of residual fraction air-flow to baffler inside, reduce the loss power of silencing apparatus, and when the throughput that be flowed into by suction port 3 hour, the noise of the corresponding generation of air-flow is less, pneumatic control valve 11 directly cuts out, air-flow directly has breathing pipe 10 to discharge through air outlet 4.
Through hole 8 mainly plays the effect of the noise sound wave of screening through hole 8 natural frequencys in first stage noise reduction operation, pore 9 is the effect of playing the noise sound wave of screening pore 9 natural frequencys in second stage noise reduction operation, after first stage noise reduction operation finishes, enter into the air-flow of second stage noise reduction operation in the time of air passing hole 9, the frequency spectrum of noise will be shifted to high frequency or ultra-high frequency, audible sound composition in frequency spectrum is obviously reduced, thereby reduce interference and injury to people; The aperture of through hole 8 is greater than the aperture of pore 9, and both self intrinsic frequency difference can successively be eliminated the sound wave of different frequency, ensures that after airflow passes the present invention, peace and quiet are harmlessly discharged; Air-flow major part through first stage noise reduction operation is passed in the spatial joint clearance between the second demarcation strip 5 and first baffle plate 6 by connecting tube 7 mouths of pipe, the just position to pore 9 of connecting tube 7 mouths of pipe, the air-flow that makes Rapid Flow cross connecting tube 7 is directly screened by pore 9, and the connecting tube 7 that remaining air-flow is connected by baffle plate 6 bottoms is again discharged, increase the efficiency that pore 9 screens sound wave; Second stage noise reduction operation is the final processing to noise sound wave in air-flow, aperture on second baffle plate 6 to suction port 3 to air outlet 4 directions is less than the aperture of first baffle plate 6, make air-flow be graded again processing, through twice screening of second stage noise reduction operation, can thoroughly ensure that the noise in air-flow is completely eliminated.
After the noise in air-flow is completely by first stage and second stage noise reduction operation, the sound wave of low and medium frequency is thoroughly processed, remaining high frequency sound wave is absorbed by the numerous spaces on silencing cotton 12, after constantly transmitting and absorbing, ensures that in air-flow, noise is eliminated completely.
Above-described embodiment; object of the present invention, technological scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. the silencer of outlet pipe, comprise cylindrical shell (1), in described cylindrical shell (1), be provided with silencing cavity (2), the two ends of cylindrical shell (1) are respectively arranged with suction port (3) and air outlet (4), it is characterized in that: in described silencing cavity (2), along air outlet, (4) direction is provided with two demarcation strips (5) and baffle plate (6) successively, connecting tube (7) runs through the top of two demarcation strips (5), connecting tube (7) runs through the bottom of two baffle plates (6), the bottom of demarcation strip (5) is provided with multiple through holes (8), the top of baffle plate (6) is provided with multiple pores (9), between described air outlet (4) and suction port (3), be also connected with breathing pipe (10), described breathing pipe (10) runs through demarcation strip (5) and baffle plate (6), be provided with pneumatic control valve (11) in breathing pipe (10) and suction port (3) joint.
2. the silencer of outlet pipe according to claim 1, is characterized in that: the aperture of described through hole (8) is greater than the diameter of pore (9).
3. the silencer of outlet pipe according to claim 1, is characterized in that: connecting tube (7) mouth of pipe between described demarcation strip (5) is just to pore (9) position.
4. the silencer of outlet pipe according to claim 2, is characterized in that: be greater than the diameter near the pore (9) on the baffle plate (6) of air outlet (4) away from the diameter of the pore (9) on the baffle plate (6) of air outlet (4).
5. according to the silencer of the outlet pipe described in claim 1 ~ 4 any one, it is characterized in that: also comprise the silencing cotton (12) that is arranged at cylindrical shell (1) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099821.5A CN104165083B (en) | 2014-03-18 | 2014-03-18 | Noise reduction device of exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099821.5A CN104165083B (en) | 2014-03-18 | 2014-03-18 | Noise reduction device of exhaust pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104165083A true CN104165083A (en) | 2014-11-26 |
| CN104165083B CN104165083B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410099821.5A Active CN104165083B (en) | 2014-03-18 | 2014-03-18 | Noise reduction device of exhaust pipe |
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| CN (1) | CN104165083B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847449A (en) * | 2015-04-13 | 2015-08-19 | 成都陵川特种工业有限责任公司 | Noise weakening processing method for exhaust gas emission pipe |
| CN104863681A (en) * | 2015-04-13 | 2015-08-26 | 成都陵川特种工业有限责任公司 | Exhaust pipe silencing method |
| WO2018107866A1 (en) * | 2016-12-15 | 2018-06-21 | 詹志光 | Titanium alloy muffler duct |
| CN110552756A (en) * | 2018-05-30 | 2019-12-10 | 上海天纳克排气系统有限公司 | Silencing bag |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5984045A (en) * | 1997-02-14 | 1999-11-16 | Nissan Motor Co., Ltd. | Engine exhaust noise suppressor |
| CN101372909A (en) * | 2007-08-21 | 2009-02-25 | 比亚迪股份有限公司 | Silencer for automobile |
| US20090145689A1 (en) * | 2007-12-07 | 2009-06-11 | Hyundai Motor Company | Muffler of vehicle and exhaust apparatus using the same |
| CN203189093U (en) * | 2013-03-27 | 2013-09-11 | 杨悟英 | Silencer |
| CN203452880U (en) * | 2013-07-25 | 2014-02-26 | 成都陵川特种工业有限责任公司 | Automobile noise reduction drum |
| CN203742737U (en) * | 2014-03-18 | 2014-07-30 | 成都陵川常友汽车部件制造有限公司 | Silencing structure of exhaust pipe |
-
2014
- 2014-03-18 CN CN201410099821.5A patent/CN104165083B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5984045A (en) * | 1997-02-14 | 1999-11-16 | Nissan Motor Co., Ltd. | Engine exhaust noise suppressor |
| CN101372909A (en) * | 2007-08-21 | 2009-02-25 | 比亚迪股份有限公司 | Silencer for automobile |
| US20090145689A1 (en) * | 2007-12-07 | 2009-06-11 | Hyundai Motor Company | Muffler of vehicle and exhaust apparatus using the same |
| CN203189093U (en) * | 2013-03-27 | 2013-09-11 | 杨悟英 | Silencer |
| CN203452880U (en) * | 2013-07-25 | 2014-02-26 | 成都陵川特种工业有限责任公司 | Automobile noise reduction drum |
| CN203742737U (en) * | 2014-03-18 | 2014-07-30 | 成都陵川常友汽车部件制造有限公司 | Silencing structure of exhaust pipe |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847449A (en) * | 2015-04-13 | 2015-08-19 | 成都陵川特种工业有限责任公司 | Noise weakening processing method for exhaust gas emission pipe |
| CN104863681A (en) * | 2015-04-13 | 2015-08-26 | 成都陵川特种工业有限责任公司 | Exhaust pipe silencing method |
| WO2018107866A1 (en) * | 2016-12-15 | 2018-06-21 | 詹志光 | Titanium alloy muffler duct |
| CN110552756A (en) * | 2018-05-30 | 2019-12-10 | 上海天纳克排气系统有限公司 | Silencing bag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104165083B (en) | 2017-01-18 |
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