CN204175378U - A kind of silencing apparatus of the excavator low-frequency noise that disappears - Google Patents
A kind of silencing apparatus of the excavator low-frequency noise that disappears Download PDFInfo
- Publication number
- CN204175378U CN204175378U CN201420559754.6U CN201420559754U CN204175378U CN 204175378 U CN204175378 U CN 204175378U CN 201420559754 U CN201420559754 U CN 201420559754U CN 204175378 U CN204175378 U CN 204175378U
- Authority
- CN
- China
- Prior art keywords
- cavity
- cylindrical shell
- diffusing tube
- frequency noise
- partition
- 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
Links
- 230000030279 gene silencing Effects 0.000 title claims abstract description 7
- 238000005192 partition Methods 0.000 claims abstract description 9
- 239000011358 absorbing material Substances 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 abstract description 11
- 230000008030 elimination Effects 0.000 abstract description 8
- 238000003379 elimination reaction Methods 0.000 abstract description 8
- 230000003584 silencer Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a kind of silencing apparatus of the excavator low-frequency noise that disappears, it is characterized in that, the inside of cylindrical shell is spaced apart the first cavity, the second cavity and the 3rd cavity by the first dividing plate and second partition, intervalve is connected in the both sides, intermediate portion of the first dividing plate and second partition, air inlet diffusing tube inserts the inside of the first cavity from the side of cylindrical shell, diffusing tube of giving vent to anger inserts the inside of the 3rd cavity above cylindrical shell, and sound absorbing material is located at the side, inside of the 3rd cavity.By above setting, the utility model maintains the resistance exhaust silencer advantage good to high frequency noise soundproof effect, and closing by pipeline section, improve the effect of noise elimination of centering, low frequency, engine supercharger whistle is well eliminated, in actual entrucking uses, achieves good effect.
Description
Technical field
The utility model relates to a kind of engine exhaust muffler, is the silencing apparatus that can eliminate low frequency noise of a kind on excavator specifically.
Background technique
At present, existing engine exhaust muffler on excavator, the resistance exhaust silencer structure of main employing 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, and existing excavator noise ratio is comparatively large in the course of the work, larger to surrounding environment influence.
Summary of the invention
The purpose of this utility model is to provide a kind of in whole frequency range, the excavator exhaust silencer that especially low-frequency range soundproof effect is good.
To achieve these goals, the inside of the utility model cylindrical shell is spaced apart the first cavity, the second cavity and the 3rd cavity by the first dividing plate and second partition, intervalve is connected in the both sides, intermediate portion of the first dividing plate and second partition, air inlet diffusing tube inserts the inside of the first cavity from the side of cylindrical shell, one end of described air inlet diffusing tube is closed, diffusing tube of giving vent to anger inserts the inside of the 3rd cavity above cylindrical shell, described diffusing tube bottom end closure of giving vent to anger, sound absorbing material is located at the side, inside of the 3rd cavity.
By above setting, the utility model maintains the resistance exhaust silencer advantage good to high frequency noise soundproof effect, and closing by pipeline section, improve the effect of noise elimination of centering, low frequency, engine supercharger whistle is well eliminated, in actual entrucking uses, achieves good effect.
Accompanying drawing explanation
Now by reference to the accompanying drawings the utility model is described further.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the left view of cylindrical shell.
Fig. 3 is the A-A sectional view of Fig. 1.
In figure: 1, cylindrical shell, the 2, first dividing plate, 3, second partition, the 4, first cavity, the 5, second cavity, the 6, the 3rd cavity, 7, intervalve, 8, air inlet diffusing tube, 9, diffusing tube of giving vent to anger, 10, sound absorbing material.
Embodiment
As shown in Figure 1, 2, 3, the inside of the utility model cylindrical shell 1 is spaced apart the first cavity 4, second cavity 5 and the 3rd cavity 6 by the first dividing plate 2 and second partition 3, intervalve 7 is connected in the both sides, intermediate portion of the first dividing plate 2 and second partition 3, air inlet diffusing tube 8 inserts the inside of the first cavity 4 from the side of cylindrical shell 1, one end of described air inlet diffusing tube 8 is closed, diffusing tube 9 of giving vent to anger inserts the inside of the 3rd cavity 6 above cylindrical shell 1, described diffusing tube 9 bottom end closure of giving vent to anger, sound absorbing material 10 is located at the side, inside of the 3rd cavity 6.By above setting, the utility model is used for the noise elimination of digger engine, the noise of engine exhaust pipe enters air inlet diffusing tube 8, the first cavity 4 is entered again by the vent on air inlet diffusing tube 8, realize one-level expansion, because one end of air inlet diffusing tube 8 is closed, the low-frequency sound wave along pipe transmmision is gone back to sound source reflects in sudden change place, thus have good effect to low-frequency noise elimination.Noise is when entering the 3rd cavity 6 from the first cavity 4 by intervalve 7, vent on intervalve 7 realizes second level expansion to noise, elimination part is low, in, high-frequency noise, simultaneously due to the vibration friction of the vent of noise on intervalve 7, eliminate part high-frequency noise, noise from the 3rd cavity 6 enter give vent to anger diffusing tube 9 time, the vent of diffusing tube 9 bottom of giving vent to anger realizes three grades of expansions to noise, elimination part is low, in, high-frequency noise, simultaneously due to the transformation in noise direction, eliminate part high-frequency noise, sound absorbing material 10 in 3rd chamber realizes eliminating part high-frequency noise.The utility model maintains the resistance exhaust silencer advantage good to high frequency noise soundproof effect, takes full advantage of the mouth of pipe and closes and the vibration friction noise elimination effect of perforated pipe, improve the soundproof effect of silencing apparatus.
Claims (1)
1. the silencing apparatus of excavator low-frequency noise that disappears, it is characterized in that: the inside of cylindrical shell is spaced apart the first cavity, the second cavity and the 3rd cavity by the first dividing plate and second partition, intervalve is connected in the both sides, intermediate portion of the first dividing plate and second partition, air inlet diffusing tube inserts the inside of the first cavity from the side of cylindrical shell, one end of described air inlet diffusing tube is closed, diffusing tube of giving vent to anger inserts the inside of the 3rd cavity above cylindrical shell, described diffusing tube bottom end closure of giving vent to anger, sound absorbing material is located at the side, inside of the 3rd cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559754.6U CN204175378U (en) | 2014-09-27 | 2014-09-27 | A kind of silencing apparatus of the excavator low-frequency noise that disappears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559754.6U CN204175378U (en) | 2014-09-27 | 2014-09-27 | A kind of silencing apparatus of the excavator low-frequency noise that disappears |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204175378U true CN204175378U (en) | 2015-02-25 |
Family
ID=52564195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420559754.6U Expired - Fee Related CN204175378U (en) | 2014-09-27 | 2014-09-27 | A kind of silencing apparatus of the excavator low-frequency noise that disappears |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204175378U (en) |
-
2014
- 2014-09-27 CN CN201420559754.6U patent/CN204175378U/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 |
Granted publication date: 20150225 Termination date: 20170927 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |