CN204200307U - The adjustable silencing apparatus of a kind of back pressure - Google Patents
The adjustable silencing apparatus of a kind of back pressure Download PDFInfo
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- CN204200307U CN204200307U CN201420590096.7U CN201420590096U CN204200307U CN 204200307 U CN204200307 U CN 204200307U CN 201420590096 U CN201420590096 U CN 201420590096U CN 204200307 U CN204200307 U CN 204200307U
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- expansion chamber
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- back pressure
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Abstract
The utility model discloses the adjustable silencing apparatus of a kind of back pressure, comprise silencer cylinder, first dividing plate and second partition, the inner chamber being located at silencer cylinder is separated into first expansion chamber of arranging successively vertically by the first dividing plate and second partition, second expansion chamber and the 3rd expansion chamber, silencer cylinder is provided with near one end of the first expansion chamber and runs through the first expansion chamber and the suction tude stretching into the second expansion chamber, being provided with near one end of the 3rd expansion chamber of silencer cylinder is run through the second expansion chamber and the 3rd expansion chamber and is stretched into the outlet pipe of the first expansion chamber, silencing apparatus also comprises two ends and stretches into the second connecting tube that the first connecting tube of the second expansion chamber and the 3rd expansion chamber and two ends stretch into the first expansion chamber and the 3rd expansion chamber respectively respectively.The utility model has can be eliminated multiple frequency ranges noise, soundproof effect is good and can reduces the advantage such as exhaust back pressure and reduction gas current friction noise when full engine load or high-load operation.
Description
Technical field
The utility model relates to silencing apparatus technical field, is specifically related to the adjustable silencing apparatus of a kind of back pressure.
Background technique
The Main Function of automotive muffler allows engine exhaust air-flow to enter in silencer component through outlet pipe, when during air-flow is by the process of silencer component by the acoustic wave energy that the combination of the inner various expansion chamber of silencing apparatus, resonant cavity decays in each particular frequency range, thus reach the effect of noise reduction.Traditional silencing apparatus is reach good soundproof effect, makes acoustic wave filter structure complicated, causes exhaust back pressure to increase, and affects engine power and exports.
Model utility content
The technical problems to be solved in the utility model overcomes the deficiency that prior art exists, and provides a kind of multiple frequency ranges noise, soundproof effect can eliminated good and can reduce exhaust back pressure when full engine load or high-load operation and reduce the adjustable silencing apparatus of back pressure of gas current friction noise.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
The adjustable silencing apparatus of a kind of back pressure, comprise silencer cylinder, first dividing plate and second partition, the inner chamber being located at silencer cylinder is separated into first expansion chamber of arranging successively vertically by described first dividing plate and second partition, second expansion chamber and the 3rd expansion chamber, described silencer cylinder is provided with near one end of the first expansion chamber and runs through the first expansion chamber and the suction tude stretching into the second expansion chamber, being provided with near one end of the 3rd expansion chamber of described silencer cylinder is run through the second expansion chamber and the 3rd expansion chamber and is stretched into the outlet pipe of the first expansion chamber, described silencing apparatus also comprises two ends and stretches into the second connecting tube that the first connecting tube of the second expansion chamber and the 3rd expansion chamber and two ends stretch into the first expansion chamber and the 3rd expansion chamber respectively respectively.
As further improvement of the utility model:
The outlet port that described second connecting tube stretches into the first expansion chamber is provided with the spring valve opened when setting pressure, and the tube wall being positioned at the first expansion chamber the second connecting tube is provided with some pores be communicated with the first expansion chamber.
The tube wall that described outlet pipe is positioned at the 3rd expansion chamber is evenly equipped with some U-shaped micropores, and has the glass fibre layer for sound-absorbing of 4 ~ 6mm in the outer wrap of U-shaped micropore.
The position that described suction tude, the second connecting tube and outlet pipe run through the first dividing plate lays respectively at leg-of-mutton three summits place, and the position that described first connecting tube, the second connecting tube and outlet pipe run through second partition lays respectively at leg-of-mutton three summits place.
The length stretching into the second expansion chamber described first connecting tube is 1/4 of the length of the second expansion chamber, and the length stretching into the 3rd expansion chamber described first connecting tube is 1/2 of the length of the 3rd expansion chamber.
The length stretching into the first expansion chamber described second connecting tube is 1/2 of the length of the first expansion chamber, and the length stretching into the 3rd expansion chamber described second connecting tube is 1/4 of the length of the 3rd expansion chamber.
The length that described suction tude stretches into the second expansion chamber is 1/2 of the length of the second expansion chamber, and the length that described outlet pipe stretches into the first expansion chamber is 1/4 of the length of the first expansion chamber.
The caliber of described suction tude is 35mm, and the caliber of described first connecting tube is 35mm, and the caliber of described second connecting tube is 30mm, and the caliber of described outlet pipe is 35mm, and the wall thickness of described suction tude, the first connecting tube, the second connecting tube and outlet pipe is 1.5mm.
Described silencer cylinder comprises urceolus and is sealedly attached to front flow-disturbing reinforcement end cap and the rear flow-disturbing reinforcement end cap at urceolus two ends respectively, and described front flow-disturbing is strengthened between end cap and suction tude, described rear flow-disturbing is strengthened being equipped with reinforcement gusset between end cap and outlet pipe.
Described front flow-disturbing strengthens end cap and rear flow-disturbing is strengthened end cap is equipped with special-shaped convex surface.
Compared with prior art, the utility model has the advantage of: the adjustable acoustic wave filter structure of back pressure of the present utility model is simple, rationally distributed, can effectively eliminate low frequency, mid-frequency noise; During low engine speeds spring valve close time, exhaust sound can be reduced to greatest extent, during motor height rotating speed spring valve open, can effectively reduce exhaust frictional noise reduce simultaneously exhaust pressed; U-shaped pore on outlet pipe and glass fibre layer effectively can control the high-frequency noise of motor; The front flow-disturbing special-shaped convex surface strengthened on end cap and rear flow-disturbing reinforcement end cap effectively can interfere the acoustic noise in each frequency range simultaneously.
Accompanying drawing explanation
Fig. 1 is the perspective view of the adjustable silencing apparatus of the utility model back pressure.
Fig. 2 is the structure principle chart of the adjustable silencing apparatus of the utility model back pressure.
Fig. 3 be in Fig. 2 A to structural representation.
Fig. 4 be in Fig. 2 B to structural representation.
Fig. 5 is C-C sectional structure schematic diagram in Fig. 2.
Fig. 6 is D-D sectional structure schematic diagram in Fig. 2.
Marginal data:
1, silencer cylinder; 11, urceolus; 12, front flow-disturbing strengthens end cap; 13, rear flow-disturbing strengthens end cap; 2, the first dividing plate; 3, second partition; 4, suction tude; 5, outlet pipe; 51, U-shaped micropore; 6, the first connecting tube; 7, the second connecting tube; 71, pore; 8, spring valve; 9, glass fibre layer; 10, gusset is strengthened; 101, the first expansion chamber; 102, the second expansion chamber; 103, the 3rd expansion chamber.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As depicted in figs. 1 and 2, the adjustable silencing apparatus of back pressure of the present utility model, comprise silencer cylinder 1, first dividing plate 2 and second partition 3, the inner chamber being located at silencer cylinder 1 is separated into first expansion chamber 101 of arranging successively vertically by the first dividing plate 2 and second partition 3, second expansion chamber 102 and the 3rd expansion chamber 103, silencer cylinder 1 is provided with near one end of the first expansion chamber 101 and runs through the first expansion chamber 101 and the suction tude 4 stretching into the second expansion chamber 102, being provided with near one end of the 3rd expansion chamber 103 of silencer cylinder 1 is run through the second expansion chamber 102 and the 3rd expansion chamber 103 and is stretched into the outlet pipe 5 of the first expansion chamber 101, silencing apparatus also comprises two ends and stretches into the second connecting tube 7 that the first connecting tube 6 of the second expansion chamber 102 and the 3rd expansion chamber 103 and two ends stretch into the first expansion chamber 101 and the 3rd expansion chamber 103 respectively respectively.
In the present embodiment, the outlet port stretching into the first expansion chamber 101 second connecting tube 7 is provided with the spring valve 8 opened when setting pressure, and the tube wall being positioned at the first expansion chamber 101 of the second connecting tube 7 is provided with some pores 71 be communicated with the first expansion chamber 101, the existing ripe parts of spring valve 8, can obtain in outsourcing.When motor is in slow-speed of revolution low load condition, spring valve 8 is in closed condition, the pore 71 of air-flow on the second connecting tube 7 tube wall enters the first expansion chamber 101, under this state, air-flow, by there is the friction energy loss of microcosmic during pore 71, can play good soundproof effect, but gas-flow resistance can increase, but because be the slow-speed of revolution and running on the lower load, exhaust back pressure is in an acceptable scope, does not affect the power stage of motor.When motor is in high rotating speed and higher load condition, air displacement is large, by the cracking pressure (setting pressure) of test data at design spring valve 8, when pressure meets setting pressure requirement, spring valve 8 is opened, air-flow enters rapidly the first expansion chamber 101 by spring valve 8, thus reduces exhaust resistance, reduces exhaust back pressure.
In the present embodiment, as shown in Figures 1 to 4, silencer cylinder 1 comprises urceolus 11 and is sealedly attached to front flow-disturbing reinforcement end cap 12 and the rear flow-disturbing reinforcement end cap 13 at urceolus 11 two ends respectively, wherein, urceolus 11 is by two pieces of thick 0.75mm, material is that the stainless steel plate of SUH409 is made, front flow-disturbing strengthens end cap 12 and rear flow-disturbing reinforcement end cap 13 adopts flanging seal mode and urceolus 11 to be connected to form an entirety, front flow-disturbing strengthens end cap 12, rear flow-disturbing strengthens end cap 13, porose position is reserved in the relevant position of the first dividing plate 2 and second partition 3, flange is left in hole, facilitate suction tude 4, outlet pipe 5, the installation of the first connecting tube 6 and the second connecting tube 7.Front flow-disturbing strengthens end cap 12 and rear flow-disturbing is strengthened end cap 13 is equipped with special-shaped convex surface, effectively can interfere the acoustic noise in each frequency range, simultaneously, front flow-disturbing is strengthened between end cap 12 and suction tude 4, rear flow-disturbing is strengthened all being welded with two pieces between end cap 13 and outlet pipe 5 and strengthened gusset 10, play the rigidity increasing pipeline, optimization system mode and the effect avoiding system generation to resonate.
In the present embodiment, the tube wall that outlet pipe 5 is positioned at the 3rd expansion chamber 103 is evenly equipped with some U-shaped micropores 51, and has the glass fibre layer 9 for sound-absorbing in the outer wrap of U-shaped micropore 51, the thickness of glass fibre layer 9 is 4 ~ 6mm.After air-flow enters the first expansion chamber 101, silencing apparatus is discharged through outlet pipe 5, when air-flow is entered in the finedraw of glass fibre layer 9 inside by the U-shaped micropore 51 on outlet pipe 5 tube wall, acoustic wave energy is converted into vibration heat energy, therefore makes high-frequency noise energy obtain decay.
In the present embodiment, the first connecting tube 6 ran through second partition 3, and its length stretching into the second expansion chamber 102 is 1/4 of the length of the second expansion chamber 102, and the length stretching into the 3rd expansion chamber 103 is 1/2 of the length of the 3rd expansion chamber 103.Air-flow is when entering the 3rd expansion chamber 103, because rear flow-disturbing strengthens the existence of end cap 13, makes air-flow strengthen irrgular reflection occurs the special-shaped convex surface of end cap 13 at rear flow-disturbing, effectively can reduce the exhaust sound of each frequency range.
The length stretching into the first expansion chamber 101 second connecting tube 7 is the length stretching into the 3rd expansion chamber 103 1/2, second connecting tube 7 of the length of the first expansion chamber 101 is 1/4 of the length of the 3rd expansion chamber 103.Because front flow-disturbing strengthens the existence of end cap 12, make air-flow strengthen irrgular reflection occurs the special-shaped convex surface of end cap 12 at front flow-disturbing, and then also effectively can reduce the exhaust sound of each frequency range.
Suction tude 4 runs through front flow-disturbing simultaneously strengthens end cap 12 and the first dividing plate 2, and its length stretching into the second expansion chamber 102 is 1/2 of the length of the second expansion chamber 102.Outlet pipe 5 runs through rear flow-disturbing simultaneously strengthens end cap 13 and second partition 3, and its length stretching into the first expansion chamber 101 is 1/4 of the length of the first expansion chamber 101.
The caliber of above-mentioned suction tude 4 is 35mm, and the caliber of the first connecting tube 6 is 35mm, and the caliber of the second connecting tube 7 is 30mm, and the caliber of outlet pipe 5 is 35mm, and the wall thickness of connecting tube 7 suction tude 4, first connecting tube 6, second and outlet pipe 5 is 1.5mm.
In the present embodiment, as shown in Figure 5 and Figure 6, the position that suction tude 4, second connecting tube 7 and outlet pipe 5 run through the first dividing plate 2 lays respectively at leg-of-mutton three summits place, and the position that namely suction tude 4, second connecting tube 7 and outlet pipe 5 run through the first dividing plate 2 is triangularly arranged.The position that first connecting tube 7 connecting tube 6, second and outlet pipe 5 run through second partition 3 lays respectively at leg-of-mutton three summits place, and the position that namely the first connecting tube 7 connecting tube 6, second and outlet pipe 5 run through second partition 3 is also triangularly arranged.
When exhaust airstream enters silencing apparatus, its distribution characteristics and noise-cancelling theory are as shown in Figure 2, air-flow enters the second expansion chamber 102 with suction tude 4, the sudden change of flow area causes the characteristic of sound wave to change, sound wave interferes phenomenon in the second expansion chamber 102, and sound noise obtains decay to a certain extent, and the more obvious divergence ratio of the abrupt change of cross-section is larger in theory, soundproof effect is also more obvious, and the divergence ratio of the present embodiment reaches 31.Air-flow enters the second expansion chamber 102 and enters the 3rd expansion chamber 103 by the first connecting tube 6, entered in the process of the 3rd expansion chamber 103 by the second expansion chamber 102, flow area experienced by twice sudden change, once sudden change is cross section (when air-flow enters first connecting tube 6 from the second expansion chamber 102) from large to small, once during sudden change, (when air-flow enters the 3rd expansion chamber 103 by the first connecting tube 6) is changed from small to big in cross section, twice divergence ratio is 31, well can eliminate the exhaust sound of low frequency phase.And the frequency of noise elimination section that the different length of the second expansion chamber 102 and the 3rd expansion chamber 103 makes them main there are differences, the soundproof effect of wideband more can be produced.Meanwhile, the design that connecting tube 7 suction tude 4, first connecting tube 6, second and outlet pipe 5 insert each expansion chamber different length also eliminates the impact by frequency in expansion chamber.
Contrasted by test data, the adjustable silencing apparatus of back pressure of the present utility model is that the conventional muffler tail pipe noise of 75dB(is about 85dB in engine speed range tail pipe noise maximum value when 0 ~ 3000rpm works), exhaust back pressure maximum value 8.325KPa (conventional muffler back pressure is about 7.842), when being in limited conditions engine speed and being 6000rpm, tail pipe noise is that the conventional muffler tail pipe noise of 88dB(is about 93dB), exhaust back pressure 23.875KPa (conventional muffler back pressure is about 30.856KPa).As can be seen here, the adjustable silencing apparatus of this back pressure acoustic attenuation performance when low speed has clear superiority, and acoustic attenuation performance at high speeds is also better than conventional silencing apparatus.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment.For those skilled in the art, do not departing from the improvement that obtains under the utility model technical conceive prerequisite and conversion also should be considered as protection domain of the present utility model.
Claims (10)
1. the adjustable silencing apparatus of back pressure, it is characterized in that: comprise silencer cylinder (1), first dividing plate (2) and second partition (3), the inner chamber being located at silencer cylinder (1) is separated into first expansion chamber (101) of arranging successively vertically by described first dividing plate (2) and second partition (3), second expansion chamber (102) and the 3rd expansion chamber (103), described silencer cylinder (1) is provided with near one end of the first expansion chamber (101) and runs through the first expansion chamber (101) and the suction tude (4) stretching into the second expansion chamber (102), being provided with near one end of the 3rd expansion chamber (103) of described silencer cylinder (1) is run through the second expansion chamber (102) and the 3rd expansion chamber (103) and is stretched into the outlet pipe (5) of the first expansion chamber (101), described silencing apparatus also comprises two ends and stretches into the second connecting tube (7) that first connecting tube (6) of the second expansion chamber (102) and the 3rd expansion chamber (103) and two ends stretch into the first expansion chamber (101) and the 3rd expansion chamber (103) respectively respectively.
2. the adjustable silencing apparatus of back pressure according to claim 1, it is characterized in that: the outlet port that described second connecting tube (7) stretches into the first expansion chamber (101) is provided with the spring valve (8) opened when setting pressure, and the tube wall being positioned at the first expansion chamber (101) the second connecting tube (7) is provided with some pores (71) be communicated with the first expansion chamber (101).
3. the adjustable silencing apparatus of back pressure according to claim 1, it is characterized in that: the tube wall that described outlet pipe (5) is positioned at the 3rd expansion chamber (103) is evenly equipped with some U-shaped micropores (51), and has the glass fibre layer for sound-absorbing (9) of 4 ~ 6mm in the outer wrap of U-shaped micropore (51).
4. the adjustable silencing apparatus of back pressure according to claim 1, it is characterized in that: the position that described suction tude (4), the second connecting tube (7) and outlet pipe (5) run through the first dividing plate (2) lays respectively at leg-of-mutton three summits place, the position that described first connecting tube (6), the second connecting tube (7) and outlet pipe (5) run through second partition (3) lays respectively at leg-of-mutton three summits place.
5. the adjustable silencing apparatus of back pressure according to any one of claim 1 to 4, it is characterized in that: the length that described first connecting tube (6) stretches into the second expansion chamber (102) is 1/4 of the length of the second expansion chamber (102), the length that described first connecting tube (6) stretches into the 3rd expansion chamber (103) is 1/2 of the length of the 3rd expansion chamber (103).
6. the adjustable silencing apparatus of back pressure according to any one of claim 1 to 4, it is characterized in that: the length that described second connecting tube (7) stretches into the first expansion chamber (101) is 1/2 of the length of the first expansion chamber (101), the length that described second connecting tube (7) stretches into the 3rd expansion chamber (103) is 1/4 of the length of the 3rd expansion chamber (103).
7. the adjustable silencing apparatus of back pressure according to any one of claim 1 to 4, it is characterized in that: the length that described suction tude (4) stretches into the second expansion chamber (102) is 1/2 of the length of the second expansion chamber (102), the length that described outlet pipe (5) stretches into the first expansion chamber (101) is 1/4 of the length of the first expansion chamber (101).
8. the adjustable silencing apparatus of back pressure according to any one of claim 1 to 4, it is characterized in that: the caliber of described suction tude (4) is 35mm, the caliber of described first connecting tube (6) is 35mm, the caliber of described second connecting tube (7) is 30mm, the caliber of described outlet pipe (5) is 35mm, and the wall thickness of described suction tude (4), the first connecting tube (6), the second connecting tube (7) and outlet pipe (5) is 1.5 mm.
9. the adjustable silencing apparatus of back pressure according to any one of claim 1 to 4, it is characterized in that: described silencer cylinder (1) comprises urceolus (11) and is sealedly attached to front flow-disturbing reinforcement end cap (12) and rear flow-disturbing reinforcement end cap (13) at urceolus (11) two ends respectively, and described front flow-disturbing is strengthened between end cap (12) and suction tude (4), described rear flow-disturbing is strengthened being equipped with between end cap (13) and outlet pipe (5) strengthening gusset (10).
10. the adjustable silencing apparatus of back pressure according to claim 9, is characterized in that: described front flow-disturbing strengthens end cap (12) and rear flow-disturbing is strengthened end cap (13) is equipped with special-shaped convex surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420590096.7U CN204200307U (en) | 2014-10-14 | 2014-10-14 | The adjustable silencing apparatus of a kind of back pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420590096.7U CN204200307U (en) | 2014-10-14 | 2014-10-14 | The adjustable silencing apparatus of a kind of back pressure |
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| Publication Number | Publication Date |
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| CN204200307U true CN204200307U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420590096.7U Active CN204200307U (en) | 2014-10-14 | 2014-10-14 | The adjustable silencing apparatus of a kind of back pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005755A (en) * | 2017-11-28 | 2018-05-08 | 陕西矩阵动力科技有限公司 | A kind of silencing apparatus and cluster engine |
| CN109209566A (en) * | 2018-09-12 | 2019-01-15 | 重庆隆鑫机车有限公司 | A kind of silencer and motorcycle |
| CN110030061A (en) * | 2019-05-15 | 2019-07-19 | 湖南农业大学 | A kind of racing car exhaust muffling device |
-
2014
- 2014-10-14 CN CN201420590096.7U patent/CN204200307U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005755A (en) * | 2017-11-28 | 2018-05-08 | 陕西矩阵动力科技有限公司 | A kind of silencing apparatus and cluster engine |
| CN109209566A (en) * | 2018-09-12 | 2019-01-15 | 重庆隆鑫机车有限公司 | A kind of silencer and motorcycle |
| CN109209566B (en) * | 2018-09-12 | 2024-04-30 | 重庆隆鑫机车有限公司 | Muffler and motorcycle |
| CN110030061A (en) * | 2019-05-15 | 2019-07-19 | 湖南农业大学 | A kind of racing car exhaust muffling device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211202 Address after: 518054 building 6a, Qianhai enterprise residence, No. 63, Qianwan 1st Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong Patentee after: Shenzhen laowantong Network Co.,Ltd. Address before: 410000 No. 19, Lixiang East Road, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Patentee before: CHANGSHA ZOTYE AUTO INDUSTRY CO.,LTD. |
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| TR01 | Transfer of patent right |