CN2573685Y - Expanding multi-stage engine exhaust silencer - Google Patents
Expanding multi-stage engine exhaust silencer Download PDFInfo
- Publication number
- CN2573685Y CN2573685Y CN 02257871 CN02257871U CN2573685Y CN 2573685 Y CN2573685 Y CN 2573685Y CN 02257871 CN02257871 CN 02257871 CN 02257871 U CN02257871 U CN 02257871U CN 2573685 Y CN2573685 Y CN 2573685Y
- Authority
- CN
- China
- Prior art keywords
- resonantron
- chamber
- cavity
- silencing apparatus
- micropore
- 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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- Exhaust Silencers (AREA)
Abstract
The utility model relates to an exhaust silencer matched in an exhaust pipe of a vapor or diesel engine, a cylindrical cavity which is composed of a cylinder body, a front bottom plate, and a rear bottom plate is provided, and the inner part of the cavity is partitioned into a first cavity, a second cavity, and a third cavity by partitioning plates; a resonance pipe is arranged between the first and the second cavities, and the tube wall of the resonance pipe is provided with micro holes, the hole diameter is larger than 0 and is smaller than 8 mm. The abrupt change of the tube cross section is used for changing acoustic reactance, an acoustic wave is reflected and interferes by a plurality of times, the noise generating mechanism is changed, and thereby, the noise is lowered. Compared with the prior art, the utility model has the obvious noise lowering property and can matched on the exhaust pipes the large, middle, and light vapor or diesel engines.
Description
Technical field
The utility model relates to supporting exhausting silencer technical field in vapour, diesel engine exhaust.
Background technique
Along with people life, requirements of one's work, all kinds of automobiles that travel on the municipal highway increase day by day and do not subtract, and the exhaust of these big or middle, light-duty gasoline, diesel engine greatly influenced the environment of living.In order to reduce exhaust sound, people connect the expanssion type silencing apparatus in automobile engine exhaust pipe.This silencing apparatus constitutes the tubular cavity of barrel dliameter greater than the outlet pipe caliber by the cylindrical shell and the forward and backward base plate of sealing, and is separated out three to four chambeies in cavity, resonantron is set in the chamber, but actual effect is extremely undesirable.
Technological scheme
The utility model purpose is to design a kind of novel expanded formula multi-stage engine exhaust silencer that can effectively reduce noise for automobile engine exhaust pipe.
The utility model comprises the tubular cavity of being made up of cylindrical shell and forward and backward base plate, be separated to form first chamber, second chamber and the 3rd chamber by demarcation strip in the cavity, arrange resonantron between first and second chamber, its characteristic point is that the tube wall of described resonantron is provided with micropore, micropore size is greater than 0, and equals 8mm for a short time.
The utility model utilizes the pipeline section sudden change to change acoustic reactance, sound wave is produced repeatedly reflect, interfere, and changes the mechanism that noise produces, thereby reduces noise.The utility model has tangible noise reduction than prior art, can be supporting on big or middle, light vapor, diesel engine exhaust.
In addition, the punching rate of resonantron tube wall of the present utility model is 0.5～20%, and the punching rate of resonantron tube wall is 0.5～20%.By resistive and resistance principle of combining, make sound wave when wavelength is longer, impedance complex is interfered mutually because of coupling later, reaches sound wave and decays in propagation process, thereby effectively reduce noise.
For more effective reduction noise, the utility model has designed 4～12 resonantrons, and when resonantron was even number, resonantron was around same circumference uniform distribution, and this center of circle is positioned on the cavity axis; When resonantron was odd number, one of them resonantron placed the center of circle, and other resonantron is around same circumference uniform distribution, and this center of circle is positioned on the cavity axis.
In order to expand the sound absorption frequency range, the utility model is provided with sound-absorbing material in the 3rd chamber; Radially arrange the supporting plate that is provided with micropore in the 3rd chamber, the inner core of external diameter less than the 3rd chamber cavity internal diameter is set between supporting plate and the 3rd chamber base plate, inner tube wall is provided with micropore, at inner core baffle plate is set radially, be provided with spacing between the base plate of the outer side surface of baffle plate and tubular cavity, above-mentioned sound-absorbing material is filled in the inner core of baffle plate inboard.
In order to guarantee power character, the economic index of working life of the present utility model, assurance noise reduction and vehicle, safeguard, clean this silencing apparatus, with the inner foreign matter of timely removal, cylindrical shell segmentation of the present utility model is provided with.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the A-A cut-away view.
Specific embodiment
Cylindrical barrel of the present utility model is made up of preceding cylindrical shell 3, middle cylinder body 5 and rear cylinder body 8, and the front end of preceding cylindrical shell 3 connects noseplate 2, offers circular hole in noseplate 2 axle center, preceding connection connecting tube 1, and the rear end of preceding cylindrical shell 3 is provided with flanging.The rear end of rear cylinder body 8 connects back base plate 11, and axis connects connecting tube 12, and the front end of rear cylinder body 8 is provided with flanging.Flanging is established at the two ends of middle cylinder body 5 respectively, is connected with flange with preceding cylindrical shell 3 and rear cylinder body 8 respectively.
Front end at middle cylinder body 5 radially connects dividing plate 4, arrange a circular hole in its axle center, uniform four circular holes on a circumference in the same center of circle, in middle cylinder body 5, also radially connect another dividing plate 6, in five circular holes of dividing plate 4, penetrate five resonantrons 14 respectively, every resonantron 14 all be parallel to cylindrical shell 5 axially, the bottom of resonantron 14 is connected dividing plate 6 inboards, on the dividing plate 6 in the outside of resonantron 14 uniform micropore 15.Above-mentioned five resonantrons 14 are made for the 0.5mm metal by thickness, and tube wall is offered the micropore that diameter is 1mm, and the punching rate of tube wall is 10%.
Radially be connected the supporting plate 7 of uniform micropore 8 of middle cylinder body 5 and rear cylinder bodies, inner core 9 coaxial arrangement are in the 3rd chamber, and its two ends are connected on supporting plate 7 and the back base plate 11, inner core 9 uniform micropores, and 8 of inner core 9 and rear cylinder bodies are provided with spacing.In inner core 9, radially be connected with the baffle plate 10 of micropore, filling sucting sound material 13 in the cavity that baffle plate 10, supporting plate 7 and inner core 9 constitute.
Claims (7)
1, novel expanded formula multi-stage engine exhaust silencer, comprise the tubular cavity of forming by cylindrical shell and forward and backward base plate, be separated to form first chamber, second chamber and the 3rd chamber by demarcation strip in the cavity, between first and second chamber, arrange resonantron, the tube wall that it is characterized in that described resonantron is provided with micropore, the aperture is greater than 0, and equals 8mm for a short time.
2, according to the described silencing apparatus of claim 1, the punching rate that it is characterized in that the resonantron tube wall is 0.5～20%.
3, according to the described silencing apparatus of claim 1, it is characterized in that resonantron is 4～12, when resonantron was even number, resonantron was around same circumference uniform distribution, and this center of circle is positioned on the cavity axis; When resonantron was odd number, one of them resonantron placed the center of circle, and other resonantron is around same circumference uniform distribution, and this center of circle is positioned on the cavity axis.
4,, it is characterized in that in the 3rd chamber, sound-absorbing material being set according to the described silencing apparatus of claim 1.
5, according to the described silencing apparatus of claim 4, it is characterized in that in the 3rd chamber, radially arranging the supporting plate that is provided with micropore, the inner core of external diameter less than the 3rd chamber cavity internal diameter is set between supporting plate and the 3rd chamber base plate, inner tube wall is provided with micropore, at inner core baffle plate is set radially, be provided with spacing between the base plate of the outer side surface of baffle plate and tubular cavity, above-mentioned sound-absorbing material is filled in the inner core of baffle plate inboard.
6,, it is characterized in that baffle plate is provided with micropore according to the described silencing apparatus of claim 5.
7,, it is characterized in that cylindrical shell segmentation setting according to the described silencing apparatus of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02257871 CN2573685Y (en) | 2002-10-17 | 2002-10-17 | Expanding multi-stage engine exhaust silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02257871 CN2573685Y (en) | 2002-10-17 | 2002-10-17 | Expanding multi-stage engine exhaust silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2573685Y true CN2573685Y (en) | 2003-09-17 |
Family
ID=33725735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02257871 Expired - Fee Related CN2573685Y (en) | 2002-10-17 | 2002-10-17 | Expanding multi-stage engine exhaust silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2573685Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446219B (en) * | 2008-10-31 | 2011-03-30 | 李定初 | Carbon emission reduction muffler for vehicle |
| CN106677860A (en) * | 2017-03-22 | 2017-05-17 | 苏州亮磊知识产权运营有限公司 | Silencer for automobile exhaust pipe |
-
2002
- 2002-10-17 CN CN 02257871 patent/CN2573685Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446219B (en) * | 2008-10-31 | 2011-03-30 | 李定初 | Carbon emission reduction muffler for vehicle |
| CN106677860A (en) * | 2017-03-22 | 2017-05-17 | 苏州亮磊知识产权运营有限公司 | Silencer for automobile exhaust pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030917 Termination date: 20101017 |