CN104153849A - Tail gas and noise processing mechanism - Google Patents
Tail gas and noise processing mechanism Download PDFInfo
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- CN104153849A CN104153849A CN201410099827.2A CN201410099827A CN104153849A CN 104153849 A CN104153849 A CN 104153849A CN 201410099827 A CN201410099827 A CN 201410099827A CN 104153849 A CN104153849 A CN 104153849A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 16
- 230000009467 reduction Effects 0.000 claims abstract description 61
- 230000030279 gene silencing Effects 0.000 claims description 32
- 239000011148 porous material Substances 0.000 claims description 28
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 14
- 229920000742 Cotton Polymers 0.000 claims description 7
- 238000005192 partition Methods 0.000 abstract 4
- 238000009423 ventilation Methods 0.000 abstract 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000012216 screening Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 4
- 230000006378 damage 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
- 230000008859 change 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
- 230000003584 silencer Effects 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
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Exhaust Silencers (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a tail gas and noise processing mechanism which comprises a cylinder body. A noise reduction cavity is formed in the cylinder body, the two ends of the cylinder body are provided with an air inlet and an air outlet respectively, two partition plates and two baffles are sequentially arranged in the noise reduction cavity in the direction of an air outlet, the upper portions of the two partition plates are communicated with the lower portions of the two baffles through connecting pipes, the lower portions of the partition plates are provided with a plurality of through holes, the upper portions of the baffles are provided with a plurality of air holes, a ventilation pipe is connected between the air outlet and an air inlet and penetrates through the partition plates and the baffles, and a pneumatic control valve is arranged on the connection position of the ventilation pipe and the air inlet. The tail gas and noise processing mechanism further comprises hollow noise reduction bulges which are arranged on the through holes in the direction back to the air inlet. When air flow across the air inlet is smaller, the air flow generates smaller noise accordingly, the pneumatic control valve is shut off directly, the airflow is discharged from the air outlet and through the ventilation pipe, and the service life of the noise reduction device is prolonged.
Description
Technical field
The present invention relates to a kind of baffler, specifically refer to a kind of tail gas noise treatment mechanism.
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.Yet when general baffler production and processing, dissipative muffler and the reactive muffler mainly applied on the market at present, can only to high frequency or the noise of medium and low frequency, process 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; And not obvious to the treatment effect of noise at general single baffler filter opening, and then have influence on the efficiency of whole noise reduction operation.
Summary of the invention
The object of the present invention is to provide a kind of tail gas noise treatment mechanism, 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:
A kind of tail gas noise treatment mechanism, 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 a plurality of through holes, the top of baffle plate is provided with a plurality of pores, between described air outlet and suction port, be also connected with breathing pipe, described breathing pipe runs through demarcation strip and baffle plate, at breathing pipe and suction port joint, be provided with pneumatic control valve, the noise reduction projection that also comprises hollow, described noise reduction projection is arranged on through hole and is positioned at away from suction port direction.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, when throughput surpasses 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 by air outlet, discharged, 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, reduced residual fraction air-flow to the impact of baffler inside or corrosion, reduced 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, reduced the residual possibility of air-flow in silencing cavity, the working life that is conducive to improve baffler; Be arranged on the noise reduction projection of hollow on through hole, can carry out noise reduction processing to the noise being filtered by through hole, the sudden change that air-flow produces airflow volume in the noise reduction projection of being flowed through by through hole time, there is certain expansion in air-flow, in gas expansion self with energy just reduce gradually, and then increase the present invention at the treatment effect of the noise reduction operation of first stage.
Described noise reduction projection comprises taper round platform, and has spiral chute on taper round platform inwall.The taper round platform of hollow is arranged on through hole, the diameter of taper round platform increases gradually, and the minimum diameter of taper round platform is identical with through-hole diameter, therefore air-flow is after entering through hole, can directly in taper round platform, repeatedly expand, the corresponding minimizing of the kinetic energy of air-flow self meeting in inflation process each time, the spiral chute having on inwall can accelerate the minimizing of air-flow kinetic energy in inflation process, and then reduce pressure, speed and the density that air-flow passes through, reach the object that noise reduction is processed.
The aperture of described through hole is greater than the diameter of pore.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 when 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 people's interference and injury; The aperture of through hole is greater than the aperture of pore, and both self intrinsic frequency is different, can successively to the sound wave of different frequency, eliminate, and guarantees that after airflow passes the present invention, peace and quiet are harmlessly discharged.
Diameter away from the pore on the baffle plate of air outlet is greater than the diameter near the pore on the baffle plate of air outlet.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, twice screening through second stage noise reduction operation, can thoroughly guarantee that the noise in air-flow is completely eliminated.
Also comprise the silencing cotton that is arranged at cylinder inboard wall.Noise in air-flow is completely by after 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, guarantees that in air-flow, noise is eliminated completely.
The present invention compared with prior art, has following advantage and beneficial effect:
1, a kind of tail gas noise treatment of the present invention mechanism, 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, reduced the residual possibility of air-flow in silencing cavity, the working life that is conducive to improve baffler; Be arranged on the noise reduction projection of hollow on through hole, can carry out noise reduction processing to the noise being filtered by through hole, the sudden change that air-flow produces airflow volume in the noise reduction projection of being flowed through by through hole time, there is certain expansion in air-flow, in gas expansion self with energy just reduce gradually, and then increase the present invention at the treatment effect of the noise reduction operation of first stage;
2, a kind of tail gas noise treatment of the present invention mechanism, 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, twice screening through second stage noise reduction operation, can thoroughly guarantee that the noise in air-flow is completely eliminated.
3, a kind of tail gas noise treatment of the present invention mechanism, noise in air-flow is completely by after 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, guarantee that in air-flow, noise is eliminated completely.
Accompanying drawing explanation
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;
Fig. 2 is the structural representation of noise reduction projection;
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, 13-taper round platform, 14-spiral chute.
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 depicted in figs. 1 and 2, a kind of tail gas noise treatment of the present invention mechanism, 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, in described silencing cavity 2, interior along air outlet, 4 directions are 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 a plurality of through holes 8, the top of baffle plate 6 is provided with a plurality of 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, in breathing pipe 10 and suction port 3 joints, be provided with pneumatic control valve 11, the noise reduction projection that also comprises hollow, described noise reduction projection is arranged on through hole 8 and is positioned at away from suction port 3 directions, described noise reduction projection comprises taper round platform 13, and has spiral chute 14 on taper round platform 13 inwalls, the aperture of described through hole 8 is greater than the diameter of pore 9, diameter away from the pore 9 on the baffle plate 6 of air outlet 4 is greater than the diameter near 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, when throughput surpasses 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 could pass through the space that through hole 8 arrives between second demarcation strip 5 and baffle plate 6, 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 by air outlet 4, discharged, near the sound wave of the minority frequency of remainder pore 9 natural frequencys could pass through pore 9 and arrive air outlet 4, 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, reduced residual fraction air-flow to the impact of baffler inside or corrosion, reduced 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 4 to discharge through air outlet,
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 when 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 people's interference and injury; The aperture of through hole 8 is greater than the aperture of pore 9, and both self intrinsic frequency is different, can successively to the sound wave of different frequency, eliminate, and guarantees 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, connecting tube 7 mouths of pipe are over against the position of pore 9, 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, increased the efficiency of pore 9 screening sound waves; 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, twice screening through second stage noise reduction operation, can thoroughly guarantee that the noise in air-flow is completely eliminated; The taper round platform 13 of hollow is arranged on through hole 8, the diameter of taper round platform 13 increases gradually, and the minimum diameter of taper round platform 13 is identical with through hole 8 diameters, therefore air-flow is after entering through hole 8, can directly in taper round platform 13, repeatedly expand, the corresponding minimizing of the kinetic energy of air-flow self meeting in inflation process each time, the spiral chute 14 having on inwall can accelerate the minimizing of air-flow kinetic energy in inflation process, and then reduce pressure, speed and the density that air-flow passes through, reach the object that noise reduction is processed.
Noise in air-flow is completely by after 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, guarantees 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 modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a tail gas noise treatment mechanism, 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, the top of (7) two demarcation strips of connecting tube (5), connecting tube (7) runs through the bottom of two baffle plates (6), the bottom of demarcation strip (5) is provided with a plurality of through holes (8), the top of baffle plate (6) is provided with a plurality of 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), in breathing pipe (10) and suction port (3) joint, be provided with pneumatic control valve (11), the noise reduction projection that also comprises hollow, described noise reduction projection is arranged on through hole (8) above and is positioned at away from suction port (3) direction.
2. a kind of tail gas noise treatment according to claim 1 mechanism, is characterized in that: described noise reduction projection comprises taper round platform (13), and have spiral chute (14) on taper round platform (13) inwall.
3. a kind of tail gas noise treatment according to claim 1 mechanism, is characterized in that: the aperture of described through hole (8) is greater than the diameter of pore (9).
4. a kind of tail gas noise treatment according to claim 1 mechanism, is characterized in that: the diameter away from the pore (9) on the baffle plate (6) of air outlet (4) is greater than the diameter near the pore (9) on the baffle plate (6) of air outlet (4).
5. according to a kind of tail gas noise treatment mechanism 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 |
|---|---|---|---|
| CN201410099827.2A CN104153849B (en) | 2014-03-18 | 2014-03-18 | A kind of exhaust noise processing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099827.2A CN104153849B (en) | 2014-03-18 | 2014-03-18 | A kind of exhaust noise processing mechanism |
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| Publication Number | Publication Date |
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| CN104153849A true CN104153849A (en) | 2014-11-19 |
| CN104153849B CN104153849B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410099827.2A Active CN104153849B (en) | 2014-03-18 | 2014-03-18 | A kind of exhaust noise processing mechanism |
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| CN (1) | CN104153849B (en) |
Cited By (3)
| 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 |
| CN106555638A (en) * | 2015-09-25 | 2017-04-05 | 石家庄博鼎机电设备有限公司 | A kind of iris type casing muffler |
| CN107503924A (en) * | 2017-08-15 | 2017-12-22 | 深圳市合精密泵业科技有限公司 | A kind of piezoelectricity air pump |
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| CN202531258U (en) * | 2012-03-01 | 2012-11-14 | 大足县宏润通机配件厂 | Engine silencer |
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2014
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| CN88210188U (en) * | 1988-02-13 | 1988-11-09 | 白尚玉 | Multi-function car muffler |
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| EP1627997A1 (en) * | 2004-08-16 | 2006-02-22 | J. Eberspächer GmbH & Co. KG | Muffler and manufacturing method. |
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Cited By (3)
| 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 |
| CN106555638A (en) * | 2015-09-25 | 2017-04-05 | 石家庄博鼎机电设备有限公司 | A kind of iris type casing muffler |
| CN107503924A (en) * | 2017-08-15 | 2017-12-22 | 深圳市合精密泵业科技有限公司 | A kind of piezoelectricity air pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104153849B (en) | 2016-09-07 |
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