CN202483685U - Three-cavity impedance combined air exhaust muffler of tractor - Google Patents
Three-cavity impedance combined air exhaust muffler of tractor Download PDFInfo
- Publication number
- CN202483685U CN202483685U CN2012201114877U CN201220111487U CN202483685U CN 202483685 U CN202483685 U CN 202483685U CN 2012201114877 U CN2012201114877 U CN 2012201114877U CN 201220111487 U CN201220111487 U CN 201220111487U CN 202483685 U CN202483685 U CN 202483685U
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- cavity
- perforated plate
- tractor
- chamber
- air exhaust
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- Exhaust Silencers (AREA)
Abstract
The utility model discloses a three-cavity impedance combined air exhaust muffler of a tractor. The three-cavity impedance combined air exhaust muffler comprises a connection flange, a lower end cover, a perforated pipe, sound absorption materials, steel wire gauze barrels, a first-stage perforated plate, a shell, a second-stage perforated plate, an upper end cover and a tail pipe, wherein the muffler is divided into a first cavity, a second cavity and a third cavity by the first-stage perforated plate and the second-stage perforated plate; the perforated pipe is arranged in the first cavity; the lower end of the perforated pipe extends out of the shell and is welded with the connection flange; the upper end of the perforated pipe is welded to the first-stage perforated plate; the lower end of the tail pipe extends into the third cavity; and the upper end of the tail pipe extends out of the shell. The sound absorption materials are arranged in the first cavity and the third cavity and fixed on the inner surface of the shell through the steel wire gauze barrels. A test shows that the air exhaust muffler has good muffling effects in low-, medium- and high- frequency band ranges and can meet the requirement on e-mark authentication of European Union.
Description
Technical field
The utility model belongs to the tractor field, relates to a kind of tractor exhaust silencer, relates in particular to the compound exhaust silencer of a kind of tractor three cavity impedances.
Background technique
At present, the tractor that China exports to European Union member countries must pass through the e-mark of European Union authentication, and the e-mark of European Union authentication is very tight to the noise requirements of tractor, requires the other noise of ear of tractor must be lower than 86 dB (A).As everyone knows, the main noise of tractor is derived from exhaust sound, reduce the other noise of ear, at first must reduce the exhaust sound of tractor.In actual life, generally, the effective exhaust silencer of eliminating the noise reduces exhaust sound through being installed.Generally use at present the resistance exhaust silencer of pure metal structure on China's tractor, this silencing apparatus to low, medium frequency section noise noise elimination effect is better, and is but not ideal for the noise elimination effect of high frequency section noise, is difficult to satisfy the requirement of the e-mark of European Union authentication.Therefore, develop and a kind ofly can satisfy the e-mark of European Union authentication requesting, the effective tractor exhaust silencer of in the full rate segment limit of low, medium frequency section and high frequency section, eliminating the noise is a problem demanding prompt solution.
The model utility content
The purpose of the utility model is to provide a kind of effective compound exhaust silencer of tractor three cavity impedances of in the full rate segment limit of low, medium frequency section and high frequency section, eliminating the noise.
The utility model is achieved the above object by following technological scheme: the compound exhaust silencer of tractor three cavity impedances comprises: adpting flange, lower end cap, perforated pipe, sound-absorbing material, steel wire cylinder, one-level perforated plate, housing, secondary perforated plate, upper end cap and tail pipe; One-level perforated plate and secondary perforated plate are divided into first chamber, second chamber, the 3rd chamber with silencing apparatus; Perforated pipe is placed in first chamber, and the lower end is stretched out housing and is welded with coupling flange, and the upper end is welded on the one-level perforated plate; The tail pipe lower end is stretched in the 3rd chamber, and housing is stretched out in the upper end.
First chamber and the 3rd chamber internal placement have sound-absorbing material, and sound-absorbing material is fixed on the internal surface of housing through the wire netting cylinder.
The utility model can produce following beneficial effect after adopting above technological scheme: verification experimental verification, this exhaust silencer all have good noise elimination effect in the full rate segment limit of low, medium frequency section and high frequency section, can satisfy the requirement of the e-mark of European Union authentication.
Description of drawings
Fig. 1 is the compound exhaust silencer structure of tractor three a cavity impedances cross-sectional schematic;
Fig. 2 is that the compound exhaust silencer inner chamber of tractor three cavity impedances D is to zoomed-in view;
Fig. 3 is that the compound exhaust silencer inner chamber of tractor three cavity impedances E is to zoomed-in view.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to describe: as shown in Figure 1; The compound exhaust silencer of tractor three cavity impedances comprises: adpting flange 1, lower end cap 2, perforated pipe 3, sound-absorbing material 4, steel wire cylinder 5, one-level perforated plate 6, housing 7, secondary perforated plate 8, upper end cap 9 and tail pipe 10; One-level perforated plate 6 is divided into the first chamber A, the second chamber B, the 3rd chamber C with secondary perforated plate 8 with silencing apparatus; Perforated pipe 3 is placed in the first chamber A, and the lower end is stretched out housing 7 and is welded with coupling flange 1, and the upper end is welded on the one-level perforated plate 6; Tail pipe 10 lower ends are stretched in the 3rd chamber C, and housing 7 is stretched out in the upper end.
The first chamber A and the 3rd chamber C internal placement have sound-absorbing material 4, and sound-absorbing material 4 is fixed on the internal surface of housing 7 through wire netting cylinder 5.
The utility model includes perforated pipe 3, one-level perforated plate 6, secondary perforated plate 8 and tail pipe 10 and is total to resistance acoustic element everywhere, and sound-absorbing material is located resistive acoustic element for 4 liang.During work, the exhaust sound of tractor enters the noise reduction very significantly of atmosphere at last through the noise reduction effect of above six place's acoustic elements through tail pipe 10.Because the resistance acoustic element is eliminated the noise effective to noise low, the medium frequency section; And resistive acoustic element is eliminated the noise effective to the noise of high frequency section; Therefore the utility model all has good noise elimination effect in the full rate segment limit of low, medium frequency section and high frequency section, can satisfy the requirement of the e-mark of European Union authentication.
The utility model is tractor provides all has good noise elimination effect in the full rate segment limit of low, medium frequency section and high frequency section the compound exhaust silencer of three cavity impedances, can satisfy the requirement of the e-mark of European Union authentication fully.
Claims (2)
1. the compound exhaust silencer of tractor three cavity impedances comprises: adpting flange (1), lower end cap (2), perforated pipe (3), sound-absorbing material (4), steel wire cylinder (5), one-level perforated plate (6), housing (7), secondary perforated plate (8), upper end cap (9) and tail pipe (10); It is characterized in that: one-level perforated plate (6) and secondary perforated plate (8) are divided into first chamber (A), second chamber (B), the 3rd chamber (C) with silencing apparatus; Perforated pipe (3) is placed in first chamber (A), and the lower end is stretched out housing (7) and is welded with coupling flange (1), and the upper end is welded on the one-level perforated plate (6); Tail pipe (10) lower end is stretched in the 3rd chamber (C), and housing (7) is stretched out in the upper end.
2. the compound exhaust silencer of tractor three cavity impedances according to claim 1; It is characterized in that: first chamber (A) and the 3rd chamber (C) internal placement have sound-absorbing material (4), and sound-absorbing material (4) is fixed on the internal surface of housing (7) through wire netting cylinder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201114877U CN202483685U (en) | 2012-03-23 | 2012-03-23 | Three-cavity impedance combined air exhaust muffler of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201114877U CN202483685U (en) | 2012-03-23 | 2012-03-23 | Three-cavity impedance combined air exhaust muffler of tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483685U true CN202483685U (en) | 2012-10-10 |
Family
ID=46958112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201114877U Expired - Fee Related CN202483685U (en) | 2012-03-23 | 2012-03-23 | Three-cavity impedance combined air exhaust muffler of tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202483685U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD832755S1 (en) * | 2015-07-27 | 2018-11-06 | Iseki & Co., Ltd. | Exhaust pipe for a work vehicle |
| US10352210B2 (en) | 2014-09-09 | 2019-07-16 | 3M Innovative Properties Company | Acoustic device |
-
2012
- 2012-03-23 CN CN2012201114877U patent/CN202483685U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10352210B2 (en) | 2014-09-09 | 2019-07-16 | 3M Innovative Properties Company | Acoustic device |
| USD832755S1 (en) * | 2015-07-27 | 2018-11-06 | Iseki & Co., Ltd. | Exhaust pipe for a work vehicle |
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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: 20121010 Termination date: 20150323 |
|
| EXPY | Termination of patent right or utility model |