CN103939179A - Impedance compound silencer good in silencing performance - Google Patents
Impedance compound silencer good in silencing performance Download PDFInfo
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- CN103939179A CN103939179A CN201410173631.3A CN201410173631A CN103939179A CN 103939179 A CN103939179 A CN 103939179A CN 201410173631 A CN201410173631 A CN 201410173631A CN 103939179 A CN103939179 A CN 103939179A
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- expansion chamber
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Abstract
The invention discloses an impedance compound silencer good in silencing performance. The impedance compound silencer good in silencing performance comprises a shell and an air inlet pipe, wherein a first expansion chamber, a second expansion chamber, a first resonance chamber and a second resonance chamber are arranged inside the shell in sequence, an exhaust pipe is arranged in the shell, one end of the exhaust pipe is located inside the first expansion chamber and penetrates through the second expansion chamber, the first resonance chamber and the second resonance chamber in sequence, one end of the air inlet pipe is closed, through holes are formed in the closed end, the closed end is located in the second expansion chamber, the other end of the air inlet pipe is located outside the shell, a partition board and a throttle orifice plate are arranged between the first expansion chamber and the second expansion chamber, through holes are formed in the partition board, the throttle orifice plate is located on one side of the second expansion chamber, through holes are formed in the exhaust pipe located in the first resonance chamber and the second resonance chamber, the diameter of each through hole in the partition board is 1.3 mm, and a sound absorption layer is arranged on the inner wall of the shell. The impedance compound silencer good in silencing performance has the advantage of being good in silencing effect.
Description
Technical field
The present invention relates to automotive muffler field, specifically, relate to the impedance complex formula silencing apparatus that a kind of acoustic attenuation performance is good.
Background technique
silencing apparatus is the vitals of automobile, and it can reduce the exhaust sound of motor as a part for exhaust duct, and can make high-temp waste gas discharge safely and effectively.At present, there are on the market a lot of silencing apparatuss, dissipative muffler and reactive muffler, and resistive structure and resistance structure are combined, just form impedance complex formula silencing apparatus.Chinese patent notification number CN201723286U discloses the impedance complex formula silencing apparatus that a kind of acoustic attenuation performance is good, it is directly by resistance section and resistive section of connection, its suction port and air outlet are located along the same line, it utilizes resistance section and resistive section respectively high frequency and medium and low frequency to be eliminated the noise, but its soundproof effect is not good.
Summary of the invention
Technical problem to be solved by this invention is to provide the impedance complex formula silencing apparatus that a kind of soundproof effect is good.
The present invention addresses the above problem adopted technological scheme:
The impedance complex formula silencing apparatus that a kind of acoustic attenuation performance is good, comprise housing and suction tude, in described housing, be provided with successively the first expansion chamber, the second expansion chamber, the first resonant chamber and the second resonant chamber, in described housing, be provided with outlet pipe, one end of described outlet pipe is positioned at the first expansion chamber and passes successively the second expansion chamber, the first resonant chamber and the second resonant chamber, one end of described suction tude is closed shape, this end is provided with through hole and is positioned at the second expansion chamber, the other end of described suction tude is positioned at outside housing, between the first described expansion chamber and the second expansion chamber, be provided with the above-mentioned through hole that is provided with of dividing plate and restricting orifice and this dividing plate, described restricting orifice is positioned at the second expansion chamber one side, be positioned on the outlet pipe of the first resonant chamber and the second resonant chamber through hole is set, the aperture of the through hole on described dividing plate is 1.3mm, on the inwall of described housing, be provided with one deck absorbent treatment.
As preferably, on the hole wall of the through hole of described dividing plate, be provided with pyramidal absorbers.
As preferably, one end that described suction tude is positioned at outside housing is fixed with flange.
To sum up, the invention has the beneficial effects as follows:
1, the first expansion chamber, the second expansion chamber, the first resonant chamber utilized of the present invention is asynchronous with the second resonant chamber internal air pressure, reaches the repeatedly sudden change of air-flow, sound wave is repeatedly interfered and offset and weaken, and improves soundproof effect.
2, through-hole aperture when second expansion chamber 3 of flowing through of the present invention enters the first expansion chamber 2 is 1.3mm, can eliminate significantly Middle and low frequency noise, noise can be reduced to 6-10dB, and soundproof effect significantly improves.
3, bulkhead through-hole quantity of the present invention is many, and it arranges pyramidal absorbers on through hole hole wall, can effectively absorb noise, improves soundproof effect.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Mark and corresponding component title in accompanying drawing: 1, housing; 2, the first expansion chamber; 3, the second expansion chamber; 4, through hole; 5, the first resonant chamber; 6, the second resonant chamber; 7, suction tude; 8, restricting orifice; 9, dividing plate; 10, outlet pipe.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is done to detailed description further, but embodiments of the present invention are not limited to this.
Embodiment 1:
The good impedance complex formula silencing apparatus of a kind of acoustic attenuation performance as shown in Figure 1, comprise housing 1 and suction tude 7, in described housing 1, be provided with successively the first expansion chamber 2, the second expansion chamber 3, the first resonant chamber 5 and the second resonant chamber 6, in described housing 1, be provided with outlet pipe 10, one end of described outlet pipe 10 is positioned at the first expansion chamber 2 and passes successively the second expansion chamber 3, the first resonant chamber 5 and the second resonant chamber 6, one end of described suction tude 7 is closed shape, this end is provided with through hole 4 and is positioned at the second expansion chamber 3, the other end of described suction tude 7 is positioned at outside housing 1, between the first described expansion chamber 2 and the second expansion chamber 3, be provided with the above-mentioned through hole 4 that is provided with of dividing plate 9 and restricting orifice 8 and this dividing plate, described restricting orifice 8 is positioned at the second expansion chamber 3 one sides, be positioned on the outlet pipe 10 of the first resonant chamber 5 and the second resonant chamber 6 through hole 4 is set, the aperture of the through hole 4 on described dividing plate 9 is 1.3mm, on the inwall of described housing 1, be provided with one deck absorbent treatment.
In the present embodiment, housing is divided into 4 chambers, in use, high pressure draught enters the second expansion chamber 3 by the through hole in suction tude 7, the sectional area of the second expansion chamber 3 sharply strengthens, and the sectional area of the first resonant chamber 5 sharply reduces, and restricting orifice 8 changes pressure jump into pressure and declines gradually, make airspeed at certain flow velocity, unlikely generation shock wave noise; Through hole on dividing plate 9 enters the first expansion chamber 2 again, the sectional area of the first expansion chamber 2 also sharply increases thereupon, air-flow in the first expansion chamber 2 enters outlet pipe, and a part of air-flow via through holes enters in the first resonant chamber 5 and the second resonant chamber 6, and residual gas stream is discharged through outlet pipe again.Adopt two resonant chambers, it can extend air-flow discharge route, weakens the pressure that gas is discharged.Air-flow, in discharge process, through repeatedly sudden change, makes sound wave repeatedly interfere counteracting and weakens, and reaches the object of noise elimination.Air-flow is in suction tude 7 enters the housing of silencing apparatus, and absorbent treatment can be eliminated high-frequency noise.Air-flow enters the first expansion chamber 2 through the second expansion chamber 3, the present invention is also studied the aperture of through hole, when air-flow is in the time that the second expansion chamber 3 enters the first expansion chamber 2, when through hole is larger, the noise energy of through hole radiation will be shifted to low frequency from high frequency, therefore, through hole wants little ability effectively to eliminate Middle and low frequency noise.Experiment showed, in the time that the aperture of through hole is 1.3mm, can eliminate significantly Middle and low frequency noise.And in the time that other conditions are identical, adopt the through hole of this pore size compared with the acoustic wave filter structure adopting in documents, it can reduce 6-10dB by noise, and its soundproof effect is remarkable.
Embodiment 2:
The good impedance complex formula silencing apparatus of a kind of acoustic attenuation performance as shown in Figure 1, in order further to strengthen soundproof effect, the present invention, on embodiment 1 basis, is provided with pyramidal absorbers on the hole wall of the through hole 4 of dividing plate 9.Utilize the noise in the further flow of process air of pyramidal absorbers, strengthen soundproof effect of the present invention.It is compared with embodiment, and it can reduce 1-3dB by noise.
Embodiment 3:
The good impedance complex formula silencing apparatus of a kind of acoustic attenuation performance as shown in Figure 1, for the ease of suction tude is fixed, the present invention is on the basis of above-described embodiment, and one end that described suction tude 7 is positioned at outside housing 1 is fixed with flange.
As mentioned above, can realize preferably the present invention.
Claims (3)
1. the impedance complex formula silencing apparatus that acoustic attenuation performance is good, it is characterized in that: comprise housing (1) and suction tude (7), in described housing (1), be provided with successively the first expansion chamber (2), the second expansion chamber (3), the first resonant chamber (5) and the second resonant chamber (6), in described housing (1), be provided with outlet pipe (10), one end of described outlet pipe (10) is positioned at the first expansion chamber (2) and passes successively the second expansion chamber (3), the first resonant chamber (5) and the second resonant chamber (6), one end of described suction tude (7) is closed shape, this end is provided with through hole (4) and is positioned at the second expansion chamber (3), the other end of described suction tude (7) is positioned at outside housing (1), between described the first expansion chamber (2) and the second expansion chamber (3), be provided with the above-mentioned through hole (4) that is provided with of dividing plate (9) and restricting orifice (8) and this dividing plate, described restricting orifice (8) is positioned at the second expansion chamber (3) one sides, be positioned on the outlet pipe (10) of the first resonant chamber (5) and the second resonant chamber (6) through hole (4) is set, the aperture of the through hole (4) on described dividing plate (9) is 1.3mm, on the inwall of described housing (1), be provided with one deck absorbent treatment.
2. the impedance complex formula silencing apparatus that a kind of acoustic attenuation performance according to claim 1 is good, is characterized in that: on the hole wall of the through hole (4) of described dividing plate (9), be provided with pyramidal absorbers.
3. the impedance complex formula silencing apparatus that a kind of acoustic attenuation performance according to claim 1 is good, is characterized in that: described suction tude (7) is positioned at the outer one end of housing (1) and is fixed with flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410173631.3A CN103939179A (en) | 2014-04-28 | 2014-04-28 | Impedance compound silencer good in silencing performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410173631.3A CN103939179A (en) | 2014-04-28 | 2014-04-28 | Impedance compound silencer good in silencing performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939179A true CN103939179A (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410173631.3A Pending CN103939179A (en) | 2014-04-28 | 2014-04-28 | Impedance compound silencer good in silencing performance |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971688A (en) * | 2016-07-22 | 2016-09-28 | 合肥汇凌汽车零部件有限公司 | Diesel internal combustion engine silencer |
| CN109404092A (en) * | 2017-08-17 | 2019-03-01 | 河南奔马股份有限公司 | A kind of exhaust silencer and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2605384Y (en) * | 2002-08-12 | 2004-03-03 | 张水成 | Exhaust silencer for internal combustion engine |
| CN2748649Y (en) * | 2004-12-09 | 2005-12-28 | 北京绿创环保设备股份有限公司 | Automobile exhaust muffler |
| JP2009257201A (en) * | 2008-04-17 | 2009-11-05 | Toyota Industries Corp | Catalyst built-in muffler |
| CN203796360U (en) * | 2014-04-28 | 2014-08-27 | 成都陵川特种工业有限责任公司 | Impedance complex muffler |
-
2014
- 2014-04-28 CN CN201410173631.3A patent/CN103939179A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2605384Y (en) * | 2002-08-12 | 2004-03-03 | 张水成 | Exhaust silencer for internal combustion engine |
| CN2748649Y (en) * | 2004-12-09 | 2005-12-28 | 北京绿创环保设备股份有限公司 | Automobile exhaust muffler |
| JP2009257201A (en) * | 2008-04-17 | 2009-11-05 | Toyota Industries Corp | Catalyst built-in muffler |
| CN203796360U (en) * | 2014-04-28 | 2014-08-27 | 成都陵川特种工业有限责任公司 | Impedance complex muffler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971688A (en) * | 2016-07-22 | 2016-09-28 | 合肥汇凌汽车零部件有限公司 | Diesel internal combustion engine silencer |
| CN109404092A (en) * | 2017-08-17 | 2019-03-01 | 河南奔马股份有限公司 | A kind of exhaust silencer and vehicle |
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Application publication date: 20140723 |