CN203856544U - Helmholtz resonance muffling unit - Google Patents
Helmholtz resonance muffling unit Download PDFInfo
- Publication number
- CN203856544U CN203856544U CN201420098132.8U CN201420098132U CN203856544U CN 203856544 U CN203856544 U CN 203856544U CN 201420098132 U CN201420098132 U CN 201420098132U CN 203856544 U CN203856544 U CN 203856544U
- Authority
- CN
- China
- Prior art keywords
- cylindrical tank
- circular hole
- helmholtz resonance
- tank body
- muffling unit
- 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
- 238000004080 punching Methods 0.000 claims abstract description 3
- 210000005239 tubule Anatomy 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 230000008030 elimination Effects 0.000 description 9
- 238000003379 elimination reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000003584 silencer Effects 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Abstract
The utility model provides a Helmholtz resonance muffling unit. The Helmholtz resonance muffling unit is characterized by comprising a cylindrical tank body, wherein a Helmholtz resonator cavity is in the space surrounded by the cylindrical tank body, or a concentric circular hole is formed in the end cover of the cylindrical tank body through punching; the edge of the concentric circular hole is turned over towards the cylindrical tank body to form a flanging, or a circular hole is formed in the central position of the end cover of the cylindrical tank body; a thin tube is fixed with the end cover through welding after passing through the circular hole. The Helmholtz resonance muffling unit provided by the utility model is low in cost and simple to manufacture, and is more suitable for automobile air intake and exhaust systems; the muffling performance of a muffling bag in other frequency is not influenced to the maximum extent.
Description
Technical field
The utility model relates to a kind of device that utilizes resonance to carry out noise elimination noise reduction.
Background technique
In automobile air inlet system and exhaust system, for eliminating the noise of characteristic frequency, often adopt Helmholtz resonator.Its form mainly contains two kinds, a kind of is at the bag internal build Helmholtz resonator of eliminating the noise, implementation method is: by one section of suction tude, or an independent pipe is as resonator neck tube, is connected can wraps internal build Helmholtz resonator in noise elimination with the cavity separating with dividing plate.The deficiency of this silencing apparatus is long-pending by taking more noise elimination inclusion, thereby has reduced to eliminate the noise and wrap in the soundproof effect of other frequency.Another kind is that Helmholtz resonator is connected on outlet pipe as independent assembly, although it is long-pending not take noise elimination inclusion as the Helmholtz resonator of independent assembly, fabricating cost is higher, and it is former thereby cannot implement to be often limited to automobile chassis space etc.
Perforated plate resonance exhaust silencer is comparatively common in Architectural acoustics, and it is used as the perforation on thick plank as neck tube, and plank thickness is neck tube length, and this neck tube and thick plank cavity below forms Helmholtz resonator.If directly perforated plate resonance exhaust silencer is applied in automobile air inlet system and exhaust system, thick plank need replace with Plate Steel, and cost is higher, and Plate Steel is too heavy, will increase automobile fuel consumption.
Summary of the invention
The purpose of this utility model is to provide a kind of noise of effective elimination characteristic frequency, and makes simply, with low cost, is convenient to the Helmholtz resonator of assembling.
In order to achieve the above object, the technical solution of the utility model has been to provide a kind of helmholtz resonance muffling unit, it is characterized in that: comprise cylindrical tank, the volume that cylindrical tank surrounds is Helmholtz resonator cavity, or form concentric circle holes in end cap or the punching press of cylindrical tank, formation flange is dug to cylindrical tank in the edge of this concentric circle holes, or forms circular hole at the center position of the end cap of cylindrical tank, and tubule is welded and fixed with end cap through after circular hole.
The principle of the helmholtz resonance muffling unit that the utility model provides is identical with perforated plate resonance exhaust silencer, difference is that the utility model utilizes circular hole flange and insertion tubule to regulate neck tube length, make cost, make simply, be more suitable for automobile air inlet system and exhaust system.The helmholtz resonance muffling unit volume that the utility model provides is little, and can not affect to the full extent eliminates the noise wraps in the acoustic attenuation performance of other frequency, eliminates the noise of a plurality of characteristic frequency for another need, can be installed in parallel a plurality of these helmholtz resonance muffling units.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model helmholtz resonance muffling unit (flange type neck tube);
Fig. 2 is the structural representation of the utility model helmholtz resonance muffling unit (thin-tube type neck tube);
Fig. 3 is that the utility model helmholtz resonance muffling unit is installed on the schematic diagram in the bag of eliminating the noise.
Embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
The main body of the helmholtz resonance muffling unit 1 that the utility model provides is cylindrical tank, and the volume that this cylindrical tank surrounds is Helmholtz resonator cavity, and the implementation method of its neck tube has two kinds:
Fig. 1 shows the way that realizes Reed bore muffler unit 1 flange type neck tube 3.At end cap 2 center positions, stamp out a concentric circle holes, concentric circle holes edge adopts flange to process, and makes concentric circle holes edge plane higher than end cap plane, and this circular hole flange has formed the flange type neck tube 3 of Helmholtz resonator.The resonant frequency of helmholtz resonance muffling unit can regulate by the height of concentric circle holes diameter and flange.Due to the restriction of flange height, this method is suitable for the noise elimination of medium-high frequency.
Fig. 2 shows the way that realizes Reed bore muffler unit 1 thin-tube type neck tube 4.At end cap 2 center positions, make a call to a circular hole, by one section of tubule through circular hole and weld and obtain thin-tube type neck tube 4.By regulating tubule diameter and length to change the resonant frequency of helmholtz resonance muffling unit, this method is suitable for the noise elimination of medium and low frequency.
The helmholtz resonance unit finally the utility model being provided is welded in and eliminates the noise on bag internal partition along airflow direction.As need are widened noise elimination frequency band, can suitably spread porous sound absorbing materials in round can inside.
Fig. 3 shows helmholtz resonance muffling unit 1 (thin-tube type neck tube 4) is installed to the way in common noise elimination bag 5.On dividing plate 8, open a circular hole identical with helmholtz resonance muffling unit 1 external diameter, then helmholtz resonance muffling unit 1 is welded on dividing plate 8.For guaranteeing best soundproof effect, the thin-tube type neck tube 4 of helmholtz resonance muffling unit 1 should with suction tude 6 over against so that sound wave normal incidence.
Claims (1)
1. a helmholtz resonance muffling unit, it is characterized in that: comprise cylindrical tank, the volume that cylindrical tank surrounds is Helmholtz resonator cavity, or form concentric circle holes in end cap (2) or the punching press of cylindrical tank, formation flange is dug to cylindrical tank in the edge of this concentric circle holes, or forming circular hole at the center position of the end cap (2) of cylindrical tank, tubule is welded and fixed with end cap (2) through after circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098132.8U CN203856544U (en) | 2014-03-05 | 2014-03-05 | Helmholtz resonance muffling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098132.8U CN203856544U (en) | 2014-03-05 | 2014-03-05 | Helmholtz resonance muffling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203856544U true CN203856544U (en) | 2014-10-01 |
Family
ID=51606403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420098132.8U Expired - Fee Related CN203856544U (en) | 2014-03-05 | 2014-03-05 | Helmholtz resonance muffling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203856544U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109379670A (en) * | 2018-11-29 | 2019-02-22 | 南京航空航天大学 | A kind of film-type Helmholtz silencer |
| CN111164671A (en) * | 2017-10-03 | 2020-05-15 | 富士胶片株式会社 | Sound-deadening tubular structure |
| CN113898443A (en) * | 2021-10-09 | 2022-01-07 | 宿州学院 | Exhaust damping and silencing device of agricultural machinery |
-
2014
- 2014-03-05 CN CN201420098132.8U patent/CN203856544U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111164671A (en) * | 2017-10-03 | 2020-05-15 | 富士胶片株式会社 | Sound-deadening tubular structure |
| CN111164671B (en) * | 2017-10-03 | 2023-09-01 | 富士胶片株式会社 | Sound-deadening tubular structure |
| CN109379670A (en) * | 2018-11-29 | 2019-02-22 | 南京航空航天大学 | A kind of film-type Helmholtz silencer |
| CN113898443A (en) * | 2021-10-09 | 2022-01-07 | 宿州学院 | Exhaust damping and silencing device of agricultural machinery |
| CN113898443B (en) * | 2021-10-09 | 2023-02-17 | 宿州学院 | Exhaust damping and silencing device of agricultural machinery |
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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: 20141001 |