CN100374841C - Automobile wind tunnel balancing seam silencer - Google Patents
Automobile wind tunnel balancing seam silencer Download PDFInfo
- Publication number
- CN100374841C CN100374841C CNB2005101190983A CN200510119098A CN100374841C CN 100374841 C CN100374841 C CN 100374841C CN B2005101190983 A CNB2005101190983 A CN B2005101190983A CN 200510119098 A CN200510119098 A CN 200510119098A CN 100374841 C CN100374841 C CN 100374841C
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- CN
- China
- Prior art keywords
- acoustical panel
- wind tunnel
- shell
- silencer
- automobile wind
- 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 present invention relates to a silencing system for automobile test devices, particularly to a silencer device for automobile wind tunnel tests. The present invention aims at eliminating noise generated when airflow flows across a balancing seam according to the noise generation principle under the condition that the balanced pressure of a test part and environment is simultaneously ensured to make the whole background noise of an automobile wind tunnel be at a low level, and accordingly, a silencer for automobile wind tunnel balance seams is designed. The silencer for automobile wind tunnel balance seams is mainly composed of a shell (1), silencing plates (2) and a bottom plate (3), wherein each silencing plate (2) is a punching corrugated plate, and every two silencing plates (2) are symmetrically welded to form a plurality of cavity sound absorbing bags; super thin glass wool and thin glass fiber fabrics (4) are filled in the sound absorbing bags; the silencing plates (2) are fixed to the shell (1) and the bottom plate (3); the silencer is fixed to the peripheral wall surface of a rectangular inlet of a first dispersing part through the shell (1) and the bottom plate (3).
Description
Technical field
The present invention relates to the silene system of automobile test device, particularly relate 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 objective of the invention is mechanism according to this noise generation, 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.
Automobile wind tunnel balancing seam silencer provided by the invention 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.
Do not bore a hole in the about 20 millimeters zone in waveform 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 technical scheme provided by the invention 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 invention 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. an 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 not boring a hole in about 20 millimeters zone, waveform bending place on the said acoustical panel (2), all the other are all bored a hole, and penetration hole diameter is about 5mm, it is 3～5mm 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 (6) on base plate and the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101190983A CN100374841C (en) | 2005-12-23 | 2005-12-23 | Automobile wind tunnel balancing seam silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101190983A CN100374841C (en) | 2005-12-23 | 2005-12-23 | Automobile wind tunnel balancing seam silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1793808A CN1793808A (en) | 2006-06-28 |
| CN100374841C true CN100374841C (en) | 2008-03-12 |
Family
ID=36805380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101190983A Expired - Fee Related CN100374841C (en) | 2005-12-23 | 2005-12-23 | Automobile wind tunnel balancing seam silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100374841C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI604434B (en) * | 2015-06-29 | 2017-11-01 | 弘人工業股份有限公司 | Acoustic absorbing combination |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277333A (en) * | 2015-11-27 | 2016-01-27 | 中国航空工业集团公司哈尔滨空气动力研究所 | Fusion-type muffler corner apparatus |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2030934U (en) * | 1988-04-13 | 1989-01-18 | 四川建筑材料工业学院 | Silencer for pneumatic hammer |
| JPH10331289A (en) * | 1997-06-05 | 1998-12-15 | Ig Tech Res Inc | Silencing panel |
| JPH11236812A (en) * | 1998-02-23 | 1999-08-31 | Mitsui Miike Mach Co Ltd | Silencer |
| JP2000319824A (en) * | 1999-05-14 | 2000-11-21 | Sumitomo Metal Steel Products Inc | Louver unit for carriageway |
| CN1512482A (en) * | 2002-12-27 | 2004-07-14 | 茅祚麻 | Sound absorptive material and its producing method and use |
| CN2694248Y (en) * | 2004-03-03 | 2005-04-20 | 吉林大学 | Low noise wind tunnel used for automobile wind tunnel experiment |
| CN2694247Y (en) * | 2004-03-03 | 2005-04-20 | 吉林大学 | Low noise wind tunnel used for automobile wind tunnel experiment |
| CN2869833Y (en) * | 2005-12-23 | 2007-02-14 | 吉林大学 | Automobile air-tunnel balancing-seam silencer |
-
2005
- 2005-12-23 CN CNB2005101190983A patent/CN100374841C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2030934U (en) * | 1988-04-13 | 1989-01-18 | 四川建筑材料工业学院 | Silencer for pneumatic hammer |
| JPH10331289A (en) * | 1997-06-05 | 1998-12-15 | Ig Tech Res Inc | Silencing panel |
| JPH11236812A (en) * | 1998-02-23 | 1999-08-31 | Mitsui Miike Mach Co Ltd | Silencer |
| JP2000319824A (en) * | 1999-05-14 | 2000-11-21 | Sumitomo Metal Steel Products Inc | Louver unit for carriageway |
| CN1512482A (en) * | 2002-12-27 | 2004-07-14 | 茅祚麻 | Sound absorptive material and its producing method and use |
| CN2694248Y (en) * | 2004-03-03 | 2005-04-20 | 吉林大学 | Low noise wind tunnel used for automobile wind tunnel experiment |
| CN2694247Y (en) * | 2004-03-03 | 2005-04-20 | 吉林大学 | Low noise wind tunnel used for automobile wind tunnel experiment |
| CN2869833Y (en) * | 2005-12-23 | 2007-02-14 | 吉林大学 | Automobile air-tunnel balancing-seam silencer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI604434B (en) * | 2015-06-29 | 2017-11-01 | 弘人工業股份有限公司 | Acoustic absorbing combination |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1793808A (en) | 2006-06-28 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20100125 |