CN203783703U - Silencer - Google Patents
Silencer Download PDFInfo
- Publication number
- CN203783703U CN203783703U CN201420003823.5U CN201420003823U CN203783703U CN 203783703 U CN203783703 U CN 203783703U CN 201420003823 U CN201420003823 U CN 201420003823U CN 203783703 U CN203783703 U CN 203783703U
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- CN
- China
- Prior art keywords
- pipeline section
- pipe
- silencing apparatus
- interpolation pipe
- air inlet
- 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 - Lifetime
Links
- 230000003584 silencer Effects 0.000 title abstract 4
- 230000030279 gene silencing Effects 0.000 claims abstract description 35
- 230000007704 transition Effects 0.000 claims abstract description 11
- 230000037431 insertion Effects 0.000 abstract 5
- 238000003780 insertion Methods 0.000 abstract 5
- 230000000694 effects Effects 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Pipe Accessories (AREA)
Abstract
The utility model relates to a silencer which comprises an inner insertion pipe structure. The inner insertion pipe structure comprises an air inlet inner insertion pipe and an air outlet inner insertion pipe. The air inlet inner insertion pipe comprises a first pipe section, a second pipe section and a middle pipe section located between the first pipe section and the second pipe section, transition pipe sections are connected to the two ends of the middle pipe section, the first pipe section and the second pipe section are connected with the transition pipe sections respectively, the pipe diameter of the first pipe section and the pipe diameter of the second pipe section are both smaller than the pipe diameter of the middle pipe section, and a plurality of punched holes are evenly formed in the pipe wall of the middle pipe section in the circumferential direction of the middle pipe section. The silencer is good in silencing and backpressure overall characteristic, and the problem that the backpressure is excessively high when an existing silencer has the good silencing characteristic is solved.
Description
Technical field
The utility model relates generally to a kind of silencing apparatus, is applied to the internal combustion engine exhaust systems such as automobile.
Background technique
Goal in research for internal combustion engine exhaust system mainly contains two aspects: 1, reduce as far as possible muffler back pressure, make motor obtain good power performance; 2, reduce as far as possible exhaust noise, reduce noise pollution.And existing silencing apparatus all can not meet the requirement of this two aspect simultaneously, as shown in Figure 1, be the enforcement illustration of silencing apparatus in prior art.As shown in the figure, in prior art, silencing apparatus comprises interpolation pipe structure, cylindrical shell 3`, is fixedly installed on the first end cap 4` and the second end cap 5` at cylindrical shell 3` two ends, in cylindrical shell 3`, be fixedly installed dividing plate 6`, dividing plate 6` is separated into the first chamber I ` and the second chamber II ` by cylindrical shell 3`, on dividing plate 6`, offer equally distributed a plurality of through hole 60`, through hole 60` is communicated with the first chamber I ` and the second chamber II `.Interpolation pipe structure comprises air inlet interpolation pipe 1` and the interpolation pipe 2` that gives vent to anger, one end of air inlet interpolation pipe 1` is positioned at the second chamber II ` and the other end stretches out outside cylindrical shell 3` through dividing plate 6`, the first chamber I ` and the first end cap 4` successively, and the pipeline section being positioned on the air inlet interpolation pipe 1` of the second chamber II ` offers equally distributed a plurality of perforation 10`.Give vent to anger that one end of interpolation pipe 2` is positioned at the first chamber I ` and the other end stretches out outside cylindrical shell 3` through dividing plate 6`, the second chamber II ` and the second end cap 5` successively.The caliber of the caliber of air inlet interpolation pipe 1` and the interpolation pipe 2` that gives vent to anger is unchanged.
As previously mentioned, the caliber of the air inlet interpolation pipe of prior art silencing apparatus is unchanged, and when the interpolation pipe of this structure utilizes the aperture of air-flow by tube wall, kinetic energy is consumed, thereby abates the noise.But relate to back pressure problems, the interpolation pipe of this structure is not a well design, reason is as follows: 1, gas reflux problem: for the gas outlet of air inlet interpolation pipe, air-flow velocity is higher, and intraductal pressure is likely higher than the outer pressure of pipe, now, just there will be air-flow by the aperture on air inlet interpolation pipe, to flow to air inlet interpolation pipe by outside managing, form anti-stream, make to flow not smooth, cause back pressure to increase; 2, the too fast problem of jet velocity: air-flow is from gas outlet when ejection of air inlet interpolation pipe, due to jet and extratubal fluid parameter difference larger, the macroscopic view kinetic energy rejection that flows is larger, and impinging jet also can make the macroscopic view kinetic energy rejection that flows on the second end cap, causes back pressure to increase; 3, reflection wave strength is crossed strong problem: air-flow impinges upon on the second end cap from the gas outlet ejection of air inlet interpolation pipe, gas outlet front end at air inlet interpolation pipe forms a zone of high pressure, and having reflected wave to form, reflected wave acts on air-flow in air inlet interpolation pipe, causes back pressure to increase.Consider, the silencing apparatus of this interpolation pipe structure conventionally all can make back pressure increase when obtaining good denoising performance, affects engine power performance.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and the silencing apparatus that a kind of back pressure is low, eliminated the noise is provided.
For solving above technical problem, the utility model adopts following technological scheme:
Silencing apparatus, described silencing apparatus has interpolation pipe structure, described interpolation pipe structure comprises air inlet interpolation pipe and the interpolation pipe of giving vent to anger, described air inlet interpolation pipe comprises the first pipeline section, the second pipeline section, middle pipeline section between described the first pipeline section and described the second pipeline section, in the middle of described, the two ends of pipeline section are connected with transitional pipe segment, described the first pipeline section is connected with described transitional pipe segment respectively with described the second pipeline section, the caliber of the caliber of described the first pipeline section and described the second pipeline section is all little than the caliber of pipeline section in the middle of described, in the middle of described, on the tube wall of pipeline section, the circumferential direction along described middle pipeline section offers equally distributed a plurality of perforation.
The horizontal sextant angle of the tube wall of described transitional pipe segment and described middle pipeline section is α, and described α is greater than 0 degree and is less than or equal to 90 degree.
Described transitional pipe segment is connected with the cambered surface transition that is connected between described middle pipeline section.
Described the first pipeline section is connected with the cambered surface transition that is connected between described transitional pipe segment.
Described the first pipeline section has the first pipeline section port that caliber increases gradually.
Described the second pipeline section is connected with the cambered surface transition that is connected between described transitional pipe segment.
Described the first pipeline section, described middle pipeline section, described transitional pipe segment and described the second pipeline section are integral type structure.
The described interpolation pipe of giving vent to anger has the interpolation pipe air inlet port of giving vent to anger that caliber increases gradually.
Due to the enforcement of technique scheme, the utility model compared with prior art tool has the following advantages:
Silencing apparatus of the present utility model is by changing the concrete structure of air inlet interpolation pipe, on air inlet interpolation pipe, there is caliber than the caliber of the caliber of the first pipeline section and the second pipeline section large middle pipeline section all, and offer perforation on middle pipeline section, the effect of the middle pipeline section of this structure is equivalent to expand pressure inlet, pressure in the middle of can making in pipeline section pipe is higher than the pressure outside its pipe, the problem that has solved the anti-stream of the air-flow that on tube wall, perforation may bring, reduces back pressure.Simultaneously, pipeline section also can play the effect of eliminating narrow band noise.
Accompanying drawing explanation
Fig. 1 is silencing apparatus of the prior art;
Fig. 2 is the structural representation of silencing apparatus in the utility model embodiment;
Fig. 3 is the structural representation of the air inlet interpolation pipe of the utility model silencing apparatus;
In Fig. 2 ~ 3, the represented name of numeral is called:
1, air inlet interpolation pipe; 10, the first pipeline section; 11, the first pipeline section port; 12, middle pipeline section; 13, perforation; 14, the second pipeline section; 15, transitional pipe segment; 2, the interpolation pipe of giving vent to anger; 20, give vent to anger interpolation pipe air inlet port, 3, cylindrical shell; 4, the first end cap; 5, the second end cap; 6, dividing plate; 60, through hole; I, the first chamber; II, the second chamber.
Embodiment
Below by a kind of silencing apparatus of concrete structure and in conjunction with Figure of description, the utility model is further described.
As shown in Fig. 2 ~ 3, silencing apparatus, comprise interpolation pipe structure, cylindrical shell 3, be fixedly installed on the first end cap 4 and second end cap 5 at cylindrical shell 3 two ends, the first end cap 4 and the second end cap 5 are all tightly connected with cylindrical shell 3, on the interior edge of cylindrical shell 3, perpendicular to cylindrical shell 3 axial directions, be fixedly installed dividing plate 6, dividing plate 6 is separated into the first chamber I and the second chamber II by cylindrical shell 3, offers equally distributed a plurality of through hole 60 on dividing plate 6, and through hole 60 is communicated with the first chamber I and the second chamber II.
Interpolation pipe structure comprises air inlet interpolation pipe 1 and the interpolation pipe 2 of giving vent to anger, air inlet interpolation pipe 1 comprises the first pipeline section 10, the second pipeline section 14, middle pipeline section 12 between the first pipeline section 10 and the second pipeline section 14, the two ends of middle pipeline section 12 are connected with transitional pipe segment 15, the horizontal sextant angle of the tube wall of transitional pipe segment 15 and middle pipeline section 12 is α, α is greater than 0 degree and is less than or equal to 90 degree, the first pipeline section 10 is connected with transitional pipe segment 15 respectively with the second pipeline section 14, the caliber of the caliber of the first pipeline section 10 and the second pipeline section 14 is all little than the caliber of middle pipeline section 12, circumferential direction along middle pipeline section 12 on the tube wall of middle pipeline section 12 offers equally distributed a plurality of perforation 13.The first pipeline section 10, middle pipeline section 12, transitional pipe segment 15 and the second pipeline section 14 are integral type structure.As shown in Figure 2, the first pipeline section 10 and the middle pipeline section 12 of air inlet interpolation pipe 1 are positioned at the second chamber II, and the second pipeline section 14 of air inlet interpolation pipe 1 stretches out outside cylindrical shell 3 through dividing plate 6, the first chamber I and the first end cap 4 successively.Give vent to anger that one end of interpolation pipe 2 is positioned at the first chamber I and the other end stretches out outside cylindrical shell 3 through dividing plate 6, the second chamber II and the second end cap 5 successively.
Particularly, transitional pipe segment 15 is connected with the cambered surface transition that is connected between middle pipeline section 12; The first pipeline section 10 is connected with the cambered surface transition that is connected between transitional pipe segment 15; The second pipeline section 14 is connected with the cambered surface transition that is connected between transitional pipe segment 15.And first pipeline section 10 there is the first pipeline section port one 1 that caliber increases gradually.The setting of pipeline section 12 in the middle of on this air inlet interpolation pipe 1, its effect is equivalent to expand pressure inlet, in the middle of being arranged so that of pipeline section 12, the pressure in pipeline section 12 pipes, higher than the pressure outside its pipe, has solved the problem of the anti-stream of 13 air-flows that may occur of boring a hole on tube wall in the middle of this, reduces back pressure.Simultaneously, pipeline section 12 also can play the effect of eliminating narrow band noise.On the other hand, the effect that arranges of the first pipeline section port one 1 is equivalent to increaser, can make high velocity air supercharging slow down, thereby the jet parameters that sprays gas is reduced with the outer gas parameter difference of pipe, and macroscopical kinetic energy rejection reduces.And because jet velocity reduces, the intensity of clashing into the second end cap 5 just reduces, the moving loss of energy of macroscopic view that shock causes also reduces, the reflection wave strength producing also reduces, and expanssion type spout can be by outside a part of reflected wave secondary reflection return pipe, just solved the too fast and excessive problem of reflection wave strength of jet velocity, and the expansion of the first pipeline section port one 1 also has noise elimination effect like this.
Particularly, the interpolation pipe 2 of giving vent to anger has the interpolation pipe air inlet port 20 of giving vent to anger that caliber increases gradually.This tapering type interpolation pipe 2 of giving vent to anger can accelerate the expansion of gas in the interpolation pipe 2 of giving vent to anger, and gas is discharged rapidly.
Also the silencing apparatus (as shown in Figure 1) using in the silencing apparatus of the present embodiment (as shown in Figure 2) and prior art has been carried out the performance comparison of simulated condition below, in simulated condition, except interpolation pipe structure is different, all parameters arrange all identical.And in order to discharge the impact of other structural factors, all only adopt an air inlet interpolation pipe, give vent to anger interpolation pipe and a dividing plate.
The performance test results is as follows: the back pressure of the silencing apparatus using in prior art is about 7.99kPa, and the back pressure of the silencing apparatus of the present embodiment is about 7.29kPa, and back pressure has reduced approximately 8.7%.
On the other hand, by acoustic theory, known, when pipeline section area changes, can strengthen energy transmission loss, so the scheme that the utility model patent proposes can also strengthen soundproof effect.
In sum, silencing apparatus of the present utility model is compared with the silencing apparatus using in prior art, the silencing apparatus using be all greatly better than prior art on reducing back pressure or soundproof effect in, overcome the silencing apparatus that uses in prior art when obtaining better acoustic characteristics, the problem that back pressure is too high.
Above the utility model is described in detail; its object is to allow the personage who is familiar with this art can understand content of the present utility model and be implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to Spirit Essence of the present utility model change or modify, and all should be encompassed in protection domain of the present utility model.
Claims (8)
1. silencing apparatus, described silencing apparatus has interpolation pipe structure, described interpolation pipe structure comprises air inlet interpolation pipe and the interpolation pipe of giving vent to anger, it is characterized in that, described air inlet interpolation pipe comprises the first pipeline section, the second pipeline section, middle pipeline section between described the first pipeline section and described the second pipeline section, in the middle of described, the two ends of pipeline section are connected with transitional pipe segment, described the first pipeline section is connected with described transitional pipe segment respectively with described the second pipeline section, the caliber of the caliber of described the first pipeline section and described the second pipeline section is all little than the caliber of pipeline section in the middle of described, in the middle of described, on the tube wall of pipeline section, the circumferential direction along described middle pipeline section offers equally distributed a plurality of perforation.
2. silencing apparatus according to claim 1, is characterized in that, the horizontal sextant angle of the tube wall of described transitional pipe segment and described middle pipeline section is α, and described α is greater than 0 degree and is less than or equal to 90 degree.
3. silencing apparatus according to claim 1, is characterized in that, described transitional pipe segment is connected with the cambered surface transition that is connected between described middle pipeline section.
4. silencing apparatus according to claim 1, is characterized in that, described the first pipeline section is connected with the cambered surface transition that is connected between described transitional pipe segment.
5. silencing apparatus according to claim 1, is characterized in that, described the first pipeline section has the first pipeline section port that caliber increases gradually.
6. silencing apparatus according to claim 1, is characterized in that, described the second pipeline section is connected with the cambered surface transition that is connected between described transitional pipe segment.
7. silencing apparatus according to claim 1, is characterized in that, described the first pipeline section, described middle pipeline section, described transitional pipe segment and described the second pipeline section are integral type structure.
8. silencing apparatus according to claim 1, is characterized in that, described in the interpolation pipe of giving vent to anger there is the interpolation pipe air inlet port of giving vent to anger that caliber increases gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420003823.5U CN203783703U (en) | 2014-01-03 | 2014-01-03 | Silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420003823.5U CN203783703U (en) | 2014-01-03 | 2014-01-03 | Silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783703U true CN203783703U (en) | 2014-08-20 |
Family
ID=51319899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420003823.5U Expired - Lifetime CN203783703U (en) | 2014-01-03 | 2014-01-03 | Silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203783703U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696840A (en) * | 2014-01-03 | 2014-04-02 | 清华大学苏州汽车研究院（相城） | Muffler |
| CN107165698A (en) * | 2017-07-07 | 2017-09-15 | 爱驰威汽车零部件（盐城）有限公司 | A kind of automobile exhaust muffler |
-
2014
- 2014-01-03 CN CN201420003823.5U patent/CN203783703U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696840A (en) * | 2014-01-03 | 2014-04-02 | 清华大学苏州汽车研究院（相城） | Muffler |
| CN103696840B (en) * | 2014-01-03 | 2016-03-23 | 清华大学苏州汽车研究院（相城） | A kind of silencing apparatus |
| CN107165698A (en) * | 2017-07-07 | 2017-09-15 | 爱驰威汽车零部件（盐城）有限公司 | A kind of automobile exhaust muffler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20160323 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |