CN204175399U - Novel low back pressure impedance complex exhaust silencer - Google Patents
Novel low back pressure impedance complex exhaust silencer Download PDFInfo
- Publication number
- CN204175399U CN204175399U CN201420585132.0U CN201420585132U CN204175399U CN 204175399 U CN204175399 U CN 204175399U CN 201420585132 U CN201420585132 U CN 201420585132U CN 204175399 U CN204175399 U CN 204175399U
- Authority
- CN
- China
- Prior art keywords
- space bar
- cylindrical shell
- back pressure
- expanding duct
- silencing apparatus
- 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 a kind of novel low back pressure impedance complex exhaust silencer, it is characterized in that, closing respectively by front cover and rear end cover of cylindrical shell, first space bar and the second space bar are by the internal layout of cylindrical shell, the intervalve that one end is closed is located at the intermediate portion of the first space bar and the second space bar, air inlet expanding duct is located at the side of the first space bar, and expanding duct of giving vent to anger is located at the side of the second space bar.By above setting, the utility model makes full use of the reduction of multilayer perforation structure and perforated pipe resistance and the vibration friction noise elimination effect of perforated pipe, improve the soundproof effect of silencing apparatus, the back pressure reducing silencing apparatus, in the silencing apparatus improved project of main engine factory, obtains good effect.
Description
Technical field
The utility model relates to a kind of engine exhaust muffler, particularly relates to a kind of exhaust silencer utilizing multilayer perforation structure to reduce back pressure noise elimination.
Background technique
At present, existing exhaust silencer mainly adopts the resistance exhaust silencer structure of pipeline section expansion and cross-sectional constriction, utilize sound wave in the change of abrupt change of cross-section place due to acoustic reactance, some sound wave goes back to sound source reflects, and not by the outlet of silencing apparatus, thus reach the object of noise elimination, but due to the restriction by entrucking space, silencing apparatus diameter can not be too large, and outlet pipe and interpolation pipe diameter can not be too large, thus causing airspeed high, muffler back pressure is high and soundproof effect is poor.
Summary of the invention
The purpose of this utility model is to provide a kind of novel low back pressure impedance complex exhaust silencer utilizing multilayer perforation structure to reduce back pressure.
To achieve these goals, closing respectively by front cover and rear end cover of cylindrical shell of the present utility model, first space bar and the second space bar are by the internal layout of cylindrical shell, vent is respectively equipped with in the both sides of the second space bar, the intervalve that one end is closed is located at the intermediate portion of the first space bar and the second space bar, air inlet expanding duct is located at the side of the first space bar, described one end of air inlet expanding duct and the inwall of cylindrical shell are formed closed, the other end passes from the side of cylindrical shell, expanding duct of giving vent to anger is located at the side of the second space bar, described one end of expanding duct of giving vent to anger and the inwall of cylindrical shell are formed closed, the other end passes from the side of cylindrical shell.
By above setting, the utility model makes full use of the reduction of multilayer perforation structure and perforated pipe resistance and the vibration friction noise elimination effect of perforated pipe, improve the soundproof effect of silencing apparatus, the back pressure reducing silencing apparatus, in the silencing apparatus improved project of main engine factory, obtains good effect.
Accompanying drawing explanation
Now by reference to the accompanying drawings the utility model is described further.
Fig. 1 is the utility model structural representation.
Fig. 2 is the A-A sectional view of Fig. 1.
In figure: 1, cylindrical shell, 2, front cover, 3, rear end cover, the 4, first space bar, the 5, second space bar, 6, vent, 7, intervalve, 8, air inlet expanding duct, 9, expanding duct of giving vent to anger.
Embodiment
As Fig. 1, shown in 2, closing respectively by front cover 2 and rear end cover 3 of the utility model cylindrical shell 1, first space bar 4 and the second space bar 5 are by the internal layout of cylindrical shell 1, vent 6 is respectively equipped with in the both sides of the second space bar 5, the intervalve 7 that one end is closed is located at the intermediate portion of the first space bar 4 and the second space bar 5, air inlet expanding duct 8 is located at the side of the first space bar 4, one end of described air inlet expanding duct 8 and the inwall of cylindrical shell 1 are formed closed, the other end passes from the side of cylindrical shell 1, expanding duct 9 of giving vent to anger is located at the side of the second space bar 5, described one end of expanding duct 9 of giving vent to anger and the inwall of cylindrical shell 1 are formed closed, the other end passes from the side of cylindrical shell 1.
By above setting, the noise of discharging from engine exhaust pipe enters air inlet expanding duct 8, mesh on air inlet expanding duct 8 realizes one-level expansion, eliminate partial noise, simultaneously because part high-frequency noise is eliminated in the vibration friction of the mesh on air inlet expanding duct 8, noise enters between the first space bar 4 and the second space bar 5 from air inlet expanding duct 8 through one end of intervalve 7, realize secondary expansion, due to the mesh dilating effect on intervalve 7, eliminate partial noise, make air-flow retarded, thus reduce some resistance, and inhibit regenerated noise, noise enters between the second space bar 5 and rear end cover 3 by the vent 6 of the second space bar 5 both sides again, realize three grades of expansions, eliminate partial noise, under the vibration rubbing action of the mesh on expanding duct 9 of giving vent to anger, eliminate part high-frequency noise, finally by giving vent to anger, expanding duct 9 is discharged.
Claims (1)
1. novel low back pressure impedance complex exhaust silencer, it is characterized in that: closing respectively by front cover and rear end cover of cylindrical shell, first space bar and the second space bar are by the internal layout of cylindrical shell, vent is respectively equipped with in the both sides of the second space bar, the intervalve that one end is closed is located at the intermediate portion of the first space bar and the second space bar, air inlet expanding duct is located at the side of the first space bar, described one end of air inlet expanding duct and the inwall of cylindrical shell are formed closed, the other end passes from the side of cylindrical shell, expanding duct of giving vent to anger is located at the side of the second space bar, described one end of expanding duct of giving vent to anger and the inwall of cylindrical shell are formed closed, the other end passes from the side of cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585132.0U CN204175399U (en) | 2014-10-11 | 2014-10-11 | Novel low back pressure impedance complex exhaust silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585132.0U CN204175399U (en) | 2014-10-11 | 2014-10-11 | Novel low back pressure impedance complex exhaust silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204175399U true CN204175399U (en) | 2015-02-25 |
Family
ID=52564215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420585132.0U Expired - Fee Related CN204175399U (en) | 2014-10-11 | 2014-10-11 | Novel low back pressure impedance complex exhaust silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204175399U (en) |
-
2014
- 2014-10-11 CN CN201420585132.0U patent/CN204175399U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20171011 |