CN203796360U - Impedance complex muffler - Google Patents
Impedance complex muffler Download PDFInfo
- Publication number
- CN203796360U CN203796360U CN201420210623.7U CN201420210623U CN203796360U CN 203796360 U CN203796360 U CN 203796360U CN 201420210623 U CN201420210623 U CN 201420210623U CN 203796360 U CN203796360 U CN 203796360U
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- CN
- China
- Prior art keywords
- expansion chamber
- chamber
- hole
- impedance complex
- housing
- 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
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Abstract
The utility model discloses an impedance complex muffler. The impedance complex muffler comprises a shell and an air inlet pipe, the shell is sequentially provided with a first expansion chamber, a second expansion chamber, a first resonance chamber and a second resonance chamber inside, an air discharge pipe is arranged in the shell, one end of the air discharge pipe is arranged in the first expansion chamber and sequentially penetrates the second expansion chamber, the first resonance chamber and the second resonance chamber, one end of the air inlet pipe is closed, the closed end is provided with through holes and arranged in the second expansion chamber, the other end of the air inlet pipe is arranged outside the shell, and a partition and a throttling hole plate are arranged between the first expansion chamber and the second expansion chamber. The partition is provided with through holes, the throttling hole plate is arranged on one side of the second expansion chamber, the air discharge pipe arranged in the first resonance chamber and the second resonance chamber are provided with through holes, and the diameter of each through hole in the partition is 1.3mm, and a muffling layer is arranged on the inner wall of the shell. The impedance complex muffler has the advantage of good muffling effect.
Description
Technical field
The utility model relates to automotive muffler field, specifically, relates to a kind of impedance complex formula silencing apparatus.
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 formed impedance complex formula silencing apparatus.Chinese patent notification number CN201723286U discloses a kind of impedance complex formula silencing apparatus, it is directly by resistance section and resistive section of connection, and its suction port and air outlet are located along the same line, and 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.
Model utility content
Technical problem to be solved in the utility model is to provide the impedance complex formula silencing apparatus that a kind of soundproof effect is good.
The technical scheme in the invention for solving the above technical problem is:
A kind of impedance complex formula silencing apparatus, 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 beneficial effects of the utility model are:
1, the first expansion chamber, the second expansion chamber, the first resonant chamber utilized of the present utility model 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.
Through-hole aperture when 2, second expansion chamber 3 of flowing through of the present utility model 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 utility model is many, and it arranges pyramidal absorbers on through hole hole wall, can effectively to noise, absorb, and improves soundproof effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
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 utility model is done to detailed description further, but mode of execution of the present utility model is not limited to this.
Embodiment 1:
A kind of impedance complex formula silencing apparatus 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 utility model is also studied the aperture of through hole, when air-flow is when 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, when the aperture of through hole is 1.3mm, can eliminate significantly Middle and low frequency noise.And when other conditions are identical, adopt the through hole of this pore size to compare with adopting the acoustic wave filter structure in documents, it can reduce 6-10dB by noise, and its soundproof effect is remarkable.
Embodiment 2:
A kind of impedance complex formula silencing apparatus as shown in Figure 1, in order further to strengthen soundproof effect, the utility model, 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 utility model.It is compared with embodiment, and it can reduce 1-3dB by noise.
Embodiment 3:
A kind of impedance complex formula silencing apparatus as shown in Figure 1, for the ease of suction tude is fixed, the utility model 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 utility model.
Claims (3)
1. an impedance complex formula silencing apparatus, 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. a kind of impedance complex formula silencing apparatus according to claim 1, is characterized in that: on the hole wall of the through hole (4) of described dividing plate (9), be provided with pyramidal absorbers.
3. a kind of impedance complex formula silencing apparatus according to claim 1, 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 |
|---|---|---|---|
| CN201420210623.7U CN203796360U (en) | 2014-04-28 | 2014-04-28 | Impedance complex muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420210623.7U CN203796360U (en) | 2014-04-28 | 2014-04-28 | Impedance complex muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203796360U true CN203796360U (en) | 2014-08-27 |
Family
ID=51378580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420210623.7U Expired - Fee Related CN203796360U (en) | 2014-04-28 | 2014-04-28 | Impedance complex muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203796360U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939179A (en) * | 2014-04-28 | 2014-07-23 | 成都陵川特种工业有限责任公司 | Impedance compound silencer good in silencing performance |
-
2014
- 2014-04-28 CN CN201420210623.7U patent/CN203796360U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939179A (en) * | 2014-04-28 | 2014-07-23 | 成都陵川特种工业有限责任公司 | Impedance compound silencer good in silencing performance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140827 Termination date: 20150428 |
|
| EXPY | Termination of patent right or utility model |