CN102011635A - Dual audio muffling exhaust pipe - Google Patents
Dual audio muffling exhaust pipe Download PDFInfo
- Publication number
- CN102011635A CN102011635A CN201010583147XA CN201010583147A CN102011635A CN 102011635 A CN102011635 A CN 102011635A CN 201010583147X A CN201010583147X A CN 201010583147XA CN 201010583147 A CN201010583147 A CN 201010583147A CN 102011635 A CN102011635 A CN 102011635A
- Authority
- CN
- China
- Prior art keywords
- antithesis
- muffling
- acoustic chamber
- exhaust pipe
- audio
- 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.)
- Granted
Links
- 230000009977 dual effect Effects 0.000 title abstract 7
- 230000005236 sound signal Effects 0.000 claims abstract description 11
- 230000030279 gene silencing Effects 0.000 claims description 21
- 230000008030 elimination Effects 0.000 claims description 9
- 238000003379 elimination reaction Methods 0.000 claims description 9
- 239000011358 absorbing material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
Images
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention relates to a muffling exhaust pipe, in particular to a dual audio muffling exhaust pipe which belongs to the field of muffling devices of internal combustion type engines. An exhaust port of the muffling exhaust pipe is hermetically connected with a primary sound conducting cavity, the muffling exhaust pipe is provided with an audio sensor, the other end of the primary sound conducting cavity is hermetically connected with a dual muffling cavity, a loudspeaker is mounted behind the dual muffling cavity, signals of the audio sensor pass through a signal amplifier, a dual audio signal generator and a power amplifier and are connected to the loudspeaker, the intersection of the primary sound conducting cavity and the dual muffling cavity is sequentially connected with a secondary sound conducting cavity and a secondary muffler, and an exhaust pipe is connected beside the wall of the second sound conducting cavity. The muffling exhaust pipe is simple in structure and can lead the muffling effect to be excellent by adopting the dual audio muffling way; furthermore, the exhaust back pressure is low, so that the muffling exhaust pipe has great market prospects.
Description
Technical field
The present invention relates to a kind of noise reduction outlet pipe, special antithesis audio frequency noise elimination outlet pipe belongs to the silencer field of internal combustion engine.
Background technique
Automobile noise reduction outlet pipe is a very matured product, its basic structure and working principle did not almost change in decades, the erasure effect of existing automobile noise reduction outlet pipe does not just almost have too big raising yet, new low price and being reported in relevant patent and the technical paper of well behaved noise reduction outlet pipe is actually rare.
Summary of the invention
The purpose of this invention is to provide a kind of antithesis audio frequency noise elimination outlet pipe, it is simple in structure, and exhaust back pressure is low, good muffling effect.
Solving the scheme that technical problem of the present invention adopts is: be tightly connected main acoustic chamber and audio sensor is set of relief opening, the main acoustic chamber the other end antithesis silencing cavity that is tightly connected, after the antithesis silencing cavity loudspeaker are installed, the signal of audio sensor is received loudspeaker through signal amplifier, antithesis audio signal generator and power amplifier, main acoustic chamber is connected time acoustic chamber and time baffler successively with antithesis silencing cavity intersection, the other tracheae that runs in of inferior acoustic chamber wall.
Described main acoustic chamber and antithesis silencing cavity adopt the Megaphone of symmetry, and Megaphone is also adopted in inferior acoustic chamber, is provided with the multi-disc dividing plate in the inferior baffler, inserts sound absorbing material in the dividing plate.
The ring-type thermal baffle is equipped with in main acoustic chamber and antithesis silencing cavity connecting part at this noise elimination outlet pipe, and the Megaphone in main acoustic chamber, antithesis silencing cavity and inferior acoustic chamber all adopts the vacuum sandwich outer wall.
During engine operation, internal combustion engine air vent scavenges, and has also constituted a noise source simultaneously.Audio sensor is installed in the relief opening position, give signal amplifier with the audio signal transmission of relief opening, audio signal transmission after amplifying is given the antithesis audio signal generator, this audio signal is anti-phase, be that audio frequency phase moves 180 °, constitute the antithesis audio signal, this audio signal is amplified the supply loudspeaker through power amplifier, and the sonic wave amplitude that loudspeaker are sounded is consistent with relief opening.Because horn-like main acoustic chamber and antithesis silencing cavity shape, structure and size are identical, the sound wave on both sides is propagated relatively, and in the process of propagating, because Megaphone adopts the laminated vacuum structure, sound wave is difficult to appear.Sound wave converges at the ring-type thermal baffle and has offset major part, and the remaining gentle stream of sound wave enters in time acoustic chamber.Here, utilized the different physical property of sound wave with air-flow, air-flow is when changing the flow direction, and sound wave still propagates into forward in time baffler.Sound absorbing material in the baffler is with most residual acoustic waves power absorption, after the outlet pipe eliminating.Owing to the engine exhaust air-flow and without the antithesis silencing cavity, add the setting of thermal baffle, make that the temperature of loudspeaker can be too not high, guaranteed loudspeaker energy proper functioning, and the antithesis silencing cavity can not produce carbon distribution.
The invention has the beneficial effects as follows: this noise elimination outlet pipe simple in structure, the mode that adopts the antithesis audio frequency to eliminate the noise makes erasure effect splendid, and exhaust back pressure is low, has good market prospects.
Description of drawings
Fig. 1 is the main generalized section of looking of the present invention.
In Fig. 1, relief opening 1, interlayer outer wall 2, main acoustic chamber 3, thermal baffle 4, inferior acoustic chamber 5, inferior baffler 6, antithesis silencing cavity 7, outlet pipe 8, audio sensor 9, signal amplifier 10, antithesis audio signal generator 11, loudspeaker 12, power amplifier 13.
Embodiment
Referring to Fig. 1, the relief opening 1 main acoustic chamber 3 that is tightly connected, and relief opening 1 also is provided with audio sensor 9, main acoustic chamber 3 the other ends and antithesis silencing cavity 7 are tightly connected, loudspeaker 12 are installed in antithesis silencing cavity 7 backs, the signal of audio sensor 9 is delivered to loudspeaker 12 after signal amplifier 10, antithesis audio signal generator 11 and power amplifier 13 are handled.Be connected acoustic chamber 5 in main acoustic chamber 3 one time with the intersection of antithesis silencing cavity 7, connect time baffler 6 behind the inferior acoustic chamber 5, the other tracheae 8 that runs in of the barrel in inferior acoustic chamber 5.Main acoustic chamber 3 and antithesis silencing cavity 7 adopt the Megaphone of symmetry, and Megaphone is also adopted in inferior acoustic chamber 5, and these several sections Megaphones all adopt the vacuum sandwich outer wall 2 of sound insulation.Be provided with the multi-disc dividing plate in the inferior baffler 5, inserted sound absorbing material in the dividing plate.The ring-type thermal baffle is equipped with in main acoustic chamber 3 and antithesis silencing cavity 7 connecting parts at this noise elimination outlet pipe, can prevent that the temperature of loudspeaker 12 is too high.
Claims (3)
1. antithesis audio frequency noise elimination outlet pipe, it is characterized in that: be tightly connected main acoustic chamber and audio sensor is set of relief opening, the main acoustic chamber the other end antithesis silencing cavity that is tightly connected, after the antithesis silencing cavity loudspeaker are installed, the signal of audio sensor is received loudspeaker through signal amplifier, antithesis audio signal generator and power amplifier, main acoustic chamber is connected time acoustic chamber and time baffler successively with antithesis silencing cavity intersection, the other tracheae that runs in of inferior acoustic chamber wall.
2. by the described antithesis audio frequency of claim 1 noise elimination outlet pipe, it is characterized in that: main acoustic chamber and antithesis silencing cavity adopt the Megaphone of symmetry, and Megaphone is also adopted in inferior acoustic chamber, is provided with the multi-disc dividing plate in the inferior baffler, inserts sound absorbing material in the dividing plate.
3. by claim 1 or 2 described antithesis audio frequency noise elimination outlet pipes, it is characterized in that: in main acoustic chamber and antithesis silencing cavity connecting part the ring-type thermal baffle is housed, the Megaphone in main acoustic chamber, antithesis silencing cavity and inferior acoustic chamber all adopts the vacuum sandwich outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010583147XA CN102011635B (en) | 2010-12-12 | 2010-12-12 | Dual audio muffling exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010583147XA CN102011635B (en) | 2010-12-12 | 2010-12-12 | Dual audio muffling exhaust pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102011635A true CN102011635A (en) | 2011-04-13 |
| CN102011635B CN102011635B (en) | 2012-10-31 |
Family
ID=43841944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010583147XA Expired - Fee Related CN102011635B (en) | 2010-12-12 | 2010-12-12 | Dual audio muffling exhaust pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102011635B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794879A (en) * | 2020-06-28 | 2020-10-20 | 潍坊新力蒙水产技术有限公司 | High-pressure gas fuel vacuum sectional air inlet pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05196225A (en) * | 1992-01-17 | 1993-08-06 | Hitachi Zosen Corp | Silencer for exhaust air duct |
| JPH0850490A (en) * | 1994-08-05 | 1996-02-20 | Kubota Corp | Active wave decreasing device |
| GB2362115A (en) * | 2000-05-12 | 2001-11-14 | Ford Global Tech Inc | Removal of particles from ic engine exhaust gas using sound |
| DE102006053855A1 (en) * | 2006-11-14 | 2008-05-15 | Benteler Automobiltechnik Gmbh | Active shock wave heterodyne e.g. exhaust gas silencer, for e.g. sound and oscillating path analysis, has pilot shock wave producer arranged between shock wave source and sensor at path, and coupled with control device |
| CN201884104U (en) * | 2010-12-12 | 2011-06-29 | 昆明理工大学 | Dual audio muffling exhaust pipe |
-
2010
- 2010-12-12 CN CN201010583147XA patent/CN102011635B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05196225A (en) * | 1992-01-17 | 1993-08-06 | Hitachi Zosen Corp | Silencer for exhaust air duct |
| JPH0850490A (en) * | 1994-08-05 | 1996-02-20 | Kubota Corp | Active wave decreasing device |
| GB2362115A (en) * | 2000-05-12 | 2001-11-14 | Ford Global Tech Inc | Removal of particles from ic engine exhaust gas using sound |
| DE102006053855A1 (en) * | 2006-11-14 | 2008-05-15 | Benteler Automobiltechnik Gmbh | Active shock wave heterodyne e.g. exhaust gas silencer, for e.g. sound and oscillating path analysis, has pilot shock wave producer arranged between shock wave source and sensor at path, and coupled with control device |
| CN201884104U (en) * | 2010-12-12 | 2011-06-29 | 昆明理工大学 | Dual audio muffling exhaust pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794879A (en) * | 2020-06-28 | 2020-10-20 | 潍坊新力蒙水产技术有限公司 | High-pressure gas fuel vacuum sectional air inlet pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102011635B (en) | 2012-10-31 |
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| 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: 20121031 Termination date: 20151212 |
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| EXPY | Termination of patent right or utility model |