CN2869833Y - Automobile air-tunnel balancing-seam silencer - Google Patents
Automobile air-tunnel balancing-seam silencer Download PDFInfo
- Publication number
- CN2869833Y CN2869833Y CN 200520029603 CN200520029603U CN2869833Y CN 2869833 Y CN2869833 Y CN 2869833Y CN 200520029603 CN200520029603 CN 200520029603 CN 200520029603 U CN200520029603 U CN 200520029603U CN 2869833 Y CN2869833 Y CN 2869833Y
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- CN
- China
- Prior art keywords
- acoustical panel
- base plate
- silencer
- wind tunnel
- seam
- 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 - Lifetime
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- Exhaust Silencers (AREA)
Abstract
The utility model relates to a silencing system of the automobile test set, in particular relates to an automobile silencer for the wind tunnel test. The utility model is designed for the automobile wind tunnel equibalance slot silencer to eliminate the noise generated in the case that the airflow flows through the equibalance slot, based on the principle of the noise generation, on the premise that the equibalance between the testing section and the ambient pressure is guaranteed, so that the background noise of the entire automobile wind tunnel remains a low level. The utility model mainly comprises an enclosure (1), a acoustic board (2) and a base plate (3). The acoustic board (2) is a perforated corrugated plate. Every two acoustic boards (2) forms a multi-chambered noise-absorbing sack by means of a balanced welding. The inner of the noise-absorbing sack is filled with an extra fine glass wool and a thin glass fiber cloth (4). The acoustic board (2) is fixed to the enclosure (1) and a base plate (3). The silencer is fixed to the peripheral wall surface at the rectangle entry of the first diffuser by the enclosure (1) and the base plate (3).
Description
Technical field
The utility model relates to the silene system of automobile test device, particularly relates to a kind of muffler assembly of automobile wind tunnel test.
Background technology
Owing to utilize automobile wind tunnel to carry out noise test, it is low-level to need the wind-tunnel background noise to be in.In single backflow automobile wind tunnel of generally remaining silent, air-flow circulates in the wind-tunnel pipeline, and the static pressure of whole test chamber is minimum, may be lower than environmental pressure.For the pressure that makes test section equals environmental pressure, the balance seam often to be set in the test section back.But when the airflow passes balance is stitched, can produce very big aerodynamic noise.The existence of this noise not only influences working environment, causes noise pollution, the more important thing is and can't carry out the pneumatic noise test of automobile.This is the difficult problem of influence test in tradition is remained silent single backflow automobile wind tunnel test device always.
Summary of the invention
The purpose of this utility model is the mechanism that produces according to this noise, in warranty test section and environmental pressure balance, the noise that produces when eliminating airflow passes balance seam, make the background noise of whole automobile wind tunnel be in low-level, guarantee to carry out the automobile aerodynamic noise test, and design a kind of automobile wind tunnel balancing seam silencer.
Above-mentioned purpose is achieved in that accompanying drawings is as follows.
The automobile wind tunnel balancing seam silencer that the utility model provides mainly is made up of shell 1, acoustical panel 2 and base plate 3, acoustical panel 2 is the perforation corrugated sheet, per two acoustical panels, 2 symmetrical seam constitute the sound-absorbing bag 4 of a plurality of cavitys, filling super glass wool and thin glass wool cloth in the sound-absorbing bag 4, acoustical panel 2 is fixed on shell 1 and the base plate 3, and exhaust box is fixed on by shell 1 and base plate 3 on the peripheral wall at rectangle entrance place of the first diffuser c.
Not boring a hole in about 20 millimeters zone, bending place on the said acoustical panel 2, all the other are all bored a hole, and penetration hole diameter is about 5mm, and it is 3～5mm that the hole heart vertically reaches transverse pitch, the position alternative arrangement in hole.
Said acoustical panel 2 is divided into long acoustical panel and short acoustical panel, and alternative arrangement; Be provided with dividing plate 5 in said each sound-absorbing bag, the two ends of every acoustical panel 2 are provided with and are used for acoustical panel is fixed to auricle 6 on base plate and the shell.
The beneficial effect of the technical scheme that the utility model provides is: the remain silent balance seam of single backflow automobile wind tunnel of tradition is designed to balancing seam silencer, guaranteeing under the wind-tunnel inside and outside air pressure balance prerequisite, eliminated the aerodynamic noise at balance seam place, guarantee the low noise level of wind-tunnel, carried out the aerodynamic noise test of automobile.
Description of drawings
The structural representation of Fig. 1 exhaust box;
The A of Fig. 2 exhaust box is to side view;
The structural representation of the sound-absorbing bag (4) of long acoustical panel of Fig. 3 and formation thereof;
Hole shape on Fig. 4 acoustical panel 2 and distribution schematic diagram.
The a. exhaust box b. test section c. first diffuser d. acoustical panel among the figure
1. shell 2. acoustical panels 3. base plates 4. sound-absorbing bags 5. dividing plates 6. auricles
Embodiment
Further specify particular content of the present utility model below in conjunction with the accompanying drawing illustrated embodiment.
Automobile wind tunnel balancing seam silencer mainly is made up of shell 1, acoustical panel 2 and base plate 3.Shell and base plate can adopt iron plate making, and are mainly used to fixedly acoustical panel.Acoustical panel adopts zinc-plated perforation iron plate to make, and penetration hole diameter is 5mm, and hole centre distance is 3～5mm.Per two acoustical panels are bent into waveform, then it are symmetrically welded together, are fixed by bolts on shell and the base plate.The acoustical panel of two bendings forms cavity, and Here it is attracts bag 4.Super glass wool and thin glass fiber are housed in the sound-absorbing bag to be situated between.Acoustical panel is divided into long acoustical panel and short acoustical panel again, and alternative arrangement.
Processing and the fixed form of exhaust box a are as follows: acoustical panel 2 is fixed by bolts on exhaust box base plate 3 and the silencer casing 1, the exhaust box base plate is fixed by bolts on two i-beam frames of the first diffuser c, and the shell front portion is fixed by bolts on the preceding channel-section steel of diffuser c.Base and shell adopt galvanized iron sheet to make, and acoustical panel adopts the perforation galvanized iron sheet to be welded.The tortuous sound-absorbing bag 4 that forms of acoustical panel is equipped with super glass wool and thin glass wool cloth in the sound-absorbing bag.
Claims (3)
1, a kind of automobile wind tunnel balancing seam silencer mainly is made up of shell (1), acoustical panel (2) and base plate (3), it is characterized in that acoustical panel (2) is the perforation corrugated sheet, the symmetrical seam of per two acoustical panels (2) constitutes the sound-absorbing bag of a plurality of cavitys, interior filling super glass wool of sound-absorbing bag (4) and thin glass wool cloth, acoustical panel (2) is fixed on shell (1) and the base plate (3), and exhaust box is fixed on by shell (1) and base plate (3) on the peripheral wall at rectangle entrance place of first diffuser (c).
2, automobile wind tunnel balancing seam silencer according to claim 1, it is characterized in that said acoustical panel (2) is not upward bored a hole in about 20 millimeters zone, bending place, all the other are all bored a hole, and penetration hole diameter is about 5mm, it is 3～5m that the hole heart vertically reaches transverse pitch, the position alternative arrangement in hole.
3, automobile wind tunnel balancing seam silencer according to claim 1 is characterized in that said acoustical panel (2) is divided into long acoustical panel and short acoustical panel, and alternative arrangement; Be provided with dividing plate (5) in said each sound-absorbing bag, the two ends of every acoustical panel (2) are provided with and are used for acoustical panel is fixed to auricle on base plate and the shell (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520029603 CN2869833Y (en) | 2005-12-23 | 2005-12-23 | Automobile air-tunnel balancing-seam silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520029603 CN2869833Y (en) | 2005-12-23 | 2005-12-23 | Automobile air-tunnel balancing-seam silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2869833Y true CN2869833Y (en) | 2007-02-14 |
Family
ID=37724773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520029603 Expired - Lifetime CN2869833Y (en) | 2005-12-23 | 2005-12-23 | Automobile air-tunnel balancing-seam silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2869833Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374841C (en) * | 2005-12-23 | 2008-03-12 | 吉林大学 | Automobile wind tunnel balancing seam silencer |
| CN103851299A (en) * | 2014-03-20 | 2014-06-11 | 苏州大学 | Engaged cavity cotton-free silencer |
-
2005
- 2005-12-23 CN CN 200520029603 patent/CN2869833Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374841C (en) * | 2005-12-23 | 2008-03-12 | 吉林大学 | Automobile wind tunnel balancing seam silencer |
| CN103851299A (en) * | 2014-03-20 | 2014-06-11 | 苏州大学 | Engaged cavity cotton-free silencer |
| CN103851299B (en) * | 2014-03-20 | 2016-03-23 | 苏州大学 | A kind of engagement cavity is without cotton silencing apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080312 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |