CN208368153U - A kind of exhausting silencer channel for high intensity sonic travelling wave test - Google Patents
A kind of exhausting silencer channel for high intensity sonic travelling wave test Download PDFInfo
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- CN208368153U CN208368153U CN201820623458.6U CN201820623458U CN208368153U CN 208368153 U CN208368153 U CN 208368153U CN 201820623458 U CN201820623458 U CN 201820623458U CN 208368153 U CN208368153 U CN 208368153U
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- reflection suppression
- flange
- suppression chamber
- noise reduction
- exhausting silencer
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Abstract
The utility model discloses a kind of exhausting silencer channels for high intensity sonic travelling wave test, including hollow reflection suppression chamber (1), resistance noise reduction section (2) and reactive muffling section (3), in which: the left and right ends of the resistance noise reduction section (2) pass through flange (5) and the reflection suppression chamber (1) respectively and reactive muffling section (3) is tightly connected；Multiple wedge absorbers (11) are distributed in the inner wall of the reflection suppression chamber (1).A kind of exhausting silencer channel for high intensity sonic travelling wave test disclosed by the utility model, it can be effectively reduced travelling-wave tubes generated high very noisy during high intensity sonic travelling wave test, reduce the noise pollution caused by external surrounding enviroment, safeguard the health of people, be conducive to widely promoting and applying, be of great practical significance.
Description
Technical field
The utility model relates to high sound intensity noise fest technical fields, try more particularly to one kind for high intensity sonic travelling wave
The exhausting silencer channel tested.
Background technique
In recent years, high sound intensity noise fest is to develop fast one branch in dynamics environment test, its development with
The development of aerospace cause is closely coupled.Due in aircraft transmitting and ascent stage, jet noise and aerodynamic noise drawn
The structural vibration risen is the vibration environment of most serious on aircraft, wherein the aircraft that volume is big, rigidity is small, to acoustic environment
Motivate it is particularly sensitive, currently, high sound intensity noise fest is considered as the best ground simulation test for simulating this vibration environment
Method.
For aircraft such as space launch vehicle and artificial satellites, will be carried out in loud strong noise environment before transmission
Acoustical testing, it is therefore an objective to the maximum acoustic load environment with appropriate safe clearance that simulation and forecast arrives, and verify it and bearing height
Reliability under the flight environment of vehicle of intensity noise.
Currently, high intensity sonic travelling wave pilot system utilizes pneumatic as a kind of main high sound intensity noise fest system
Sound source generates the Traveling wave of 160dB~170dB (decibel) sound pressure level in travelling-wave tubes, then to material or component (as flown
Device component) apply acoustic load, to carry out high sound intensity noise fest.But it for high intensity sonic travelling wave pilot system, is transporting
During row, the travelling-wave tubes having is easy to produce high very noisy, so that serious noise pollution is caused to external surrounding enviroment,
Influence the health of people.
Therefore, there is an urgent need to develop a kind of technologies out at present, can be effectively reduced travelling-wave tubes in high intensity sonic travelling wave
High very noisy caused by during test reduces the noise pollution caused by external surrounding enviroment, safeguards that the body of people is strong
Health.
Utility model content
In view of this, the purpose of the utility model is to provide a kind of exhausting silencers for high intensity sonic travelling wave pilot system
Channel can be effectively reduced travelling-wave tubes generated high very noisy during high intensity sonic travelling wave test, reduce external
Noise pollution caused by portion's surrounding enviroment safeguards the health of people, is conducive to widely promoting and applying, and has great
Production practices meaning.
For this purpose, the utility model provides a kind of exhausting silencer channel for high intensity sonic travelling wave test, including hollow
Reflection suppression chamber, resistance noise reduction section and reactive muffling section, in which:
The left and right ends of the resistance noise reduction section pass through flange and the reflection suppression chamber respectively and reactive muffling section seals
Connection；
Multiple wedge absorbers are distributed in the inner wall of the reflection suppression chamber.
Wherein, the flange is the flange with gasket.
Wherein, the left end of reflection suppression chamber company corresponding with the end of travelling-wave tubes in high intensity sonic travelling wave pilot system
It is logical.
Wherein, the left end of the reflection suppression chamber has air inlet；
The left side to interface, with the reflection suppression chamber of flange between the resistance noise reduction section and the reflection suppression chamber
The air inlet at end is staggered completely.
Wherein, reflection suppression cavity wall position corresponding with the air inlet, and with the resistance noise reduction section
Flange between the reflection suppression chamber on the corresponding position of interface, multiple wedge absorbers are distributed with.
Wherein, the wedge absorber is off the wedge absorber that frequency is 50Hz.
Wherein, the resistance noise reduction section include the first bend muffler and the second bend muffler, first bend muffler and
Second bend muffler is connected by a flange；
The left end of first bend muffler is connected with the right end of the reflection suppression chamber by a flange, institute
The right end for stating the second bend muffler is connected with the reactive muffling section by a flange.
Wherein, the reactive muffling section includes the first Extonsion Group and the second Extonsion Group, and described first expands
It opens room silencer and the second Extonsion Group is connected by a flange；
The left end of first Extonsion Group is connected with the right end of the resistance noise reduction section by a flange
It is logical.
Wherein, the right end of second Extonsion Group is equipped with the protective net of a steel；
The bottom of the reflection suppression chamber, resistance noise reduction section and reactive muffling section is separately installed at least two universal wheels.
Wherein, the wall structure of first bend muffler are as follows: including hollow steel skeleton, the outside of the steel skeleton is solid
Surely it is covered with steel plate, plasterboard is bonded on the inside of the steel skeleton, is filled with one layer of first mineral wool in the steel skeleton；
The inside covering of the plasterboard is filled with one layer of second mineral wool, is covered with one on the inside of second mineral wool
Layer glass fiber felt, the inner sidewall of the glass fiber felt are fixed with zinc-plated punched steel plate；
The wall structure of the reflection suppression chamber and resistance noise reduction section, the wall structure phase with first bend muffler
Together.
By the above technical solution provided by the utility model as it can be seen that compared with prior art, the utility model provides
A kind of exhausting silencer channel for high intensity sonic travelling wave test can be effectively reduced travelling-wave tubes and try in high intensity sonic travelling wave
High very noisy caused by during testing reduces the noise pollution caused by external surrounding enviroment, safeguards the health of people,
Be conducive to widely promoting and applying, be of great practical significance.
Detailed description of the invention
Fig. 1 is a kind of front view in exhausting silencer channel for high intensity sonic travelling wave test provided by the utility model；
Fig. 2 is a kind of top view in exhausting silencer channel for high intensity sonic travelling wave test provided by the utility model；
Fig. 3 is a kind of exhausting silencer channel edge for high intensity sonic travelling wave test provided by the utility model shown in Fig. 1
The cross-sectional view in line A-A direction；
Fig. 4 is a kind of exhausting silencer channel edge for high intensity sonic travelling wave test provided by the utility model shown in Fig. 2
The cross-sectional view in line B-B direction；
Fig. 5 is the first noise elimination in a kind of exhausting silencer channel for high intensity sonic travelling wave test provided by the utility model
The partial structural diagram of elbow
In figure: 1 is reflection suppression chamber, and 2 be resistance noise reduction section, and 3 be reactive muffling section, and 4 be protective net, and 5 be flange, and 6 are
Universal wheel；
11 be wedge absorber, and 12 be air inlet, and 21 be the first bend muffler, and 22 be the second bend muffler, and 31 expand for first
Room silencer is opened, 32 be the second Extonsion Group.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and embodiment
The utility model is described in further detail.
Referring to Fig. 1 to Fig. 5, the utility model provides a kind of exhausting silencer channel for high intensity sonic travelling wave test,
Dedicated for high intensity sonic travelling wave pilot system, match use with travelling-wave tubes, specifically includes hollow reflection suppression chamber 1, resistance
Property muffler section 2 and reactive muffling section 3, in which:
The left and right ends of the resistance noise reduction section 2 pass through flange 5 and the reflection suppression chamber 1 and reactive muffling section 3 respectively
It is tightly connected；
Multiple wedge absorbers 11 are distributed in the inner wall of the reflection suppression chamber 1.
For the utility model, in specific implementation, the flange 5 is preferably the flange with gasket.
For the utility model, in specific implementation, the left end of the reflection suppression chamber 1 and high intensity sonic travelling wave test are
End (specially diffuser end, i.e. air exit end) corresponding connection of travelling-wave tubes in system.
In specific implementation, the left end of the reflection suppression chamber 1 has air inlet 12, the air inlet and the travelling-wave tubes
End be connected.
In specific implementation, flange 5 between the resistance noise reduction section 2 and the reflection suppression chamber 1 to interface, with institute
The air inlet 12 for stating the left end of reflection suppression chamber 1 is staggered (is not correspond to be arranged) completely, that is to say, that also with traveling wave pipe end
Air exit be staggered completely.
In specific implementation, 1 inner wall of reflection suppression chamber position corresponding with the air inlet 12, and with it is described
Flange 5 between the reflection suppression chamber 1 of resistance noise reduction section 2 on the corresponding position of interface, multiple suctions are distributed with
Sound wedge 11.
In specific implementation, the wedge absorber 11 preferably uses cutoff frequency for the wedge absorber of 50Hz.
In specific implementation, the shell of each wedge absorber main body 11 is to wear using made of metal material (such as aluminium)
Orifice plate, such as can be the perforated metal panel zinc-plated with a thickness of the surface of 0.8mm.
It should be noted that wedge absorber is a kind of existing special sound absorption structure for anechoic room, structure is usual
Tip and base portion two parts can be divided into.Wedge absorber has the structure that is gradually increased from the top to the bottom, thus meet compared with
While big absorption area, also achieve with the matched well of air impedance (i.e. gradually transition principle), thus meet to low frequency
Effective absorption of sound wave.
In general, when sound-absorbing material appears in sound wave crest location (i.e. quarter-wave position), it will
There is maximum absorptivity (>=0.99%).The acoustic characteristic of wedge absorber often indicates with sound pressure reflection coefficient, sound pressure reflection system
Low-limit frequency, referred to as cutoff frequency corresponding to (grade acoustic absorptivity >=0.99) when number≤0.1.
For the utility model, in specific implementation, the resistance noise reduction section 2 includes that the first bend muffler 21 disappears with second
Sound elbow 22, first bend muffler 21 are connected with the second bend muffler 22 by a flange 5；
The left end of first bend muffler 21 is connected with the right end of the reflection suppression chamber 1 by a flange 5
Logical, the right end of second bend muffler 22 is connected with the reactive muffling section 3 by a flange 5.
In specific implementation, the resistance noise reduction section 2 is preferably chip multichannel silencer.
For the utility model, in specific implementation, the reactive muffling section 3 includes the first Extonsion Group 31 and the
Two Extonsion Groups 32, first Extonsion Group 31 and the second Extonsion Group 32 pass through a flange 5
It is connected；
(the second noise elimination specially therein is curved with the resistance noise reduction section 2 for the left end of first Extonsion Group 31
First right end 22) is connected by a flange 5.
In specific implementation, the right end (i.e. end) of second Extonsion Group 32 is equipped with the protection of a steel
Net 4.
For the utility model, it should be noted that Extonsion Group is one of principal mode of reactive muffler.It is anti-
Property silencer and dissipative muffler it is different, it does not use sound-absorbing material, but utilize various pipeline, chamber and rooms of different shapes into
Row combination appropriate, provides the impedance mismatching of pipe-line system, and sound wave is made to generate reflection or interference phenomenon, to reduce by silencer
To the sound energy of external radiation, main noise-cancelling theory is: causing acoustic impedance to change using the abrupt change of cross-section of pipeline, so that a part of edge
The sound wave of pipe transmmision is reflected back sound source；Meanwhile the variation of transit chamber, room and inscribed length of tube, so that the sound wave propagated forward
The phase difference generated between the back wave on different tube sections, interferes, to achieve the purpose that noise elimination.By its channel
Structure type, Extonsion Group can be divided into single-chamber type, well format, tapered, the double-joint type of band connection pipe, with interior connection
Five kinds of citation forms of double-joint type of pipe.
In the present invention, in specific implementation, the first Extonsion Group 31 and the second Extonsion Group 32 can be with
Using existing conventional Extonsion Group.
For the utility model, in specific implementation, the reflection suppression chamber 1, resistance noise reduction section 2 and reactive muffling section 3
Bottom be separately installed at least two universal wheels 6, the universal wheel 6 be preferably locking device universal wheel.
For the utility model, in specific implementation, the reflection suppression chamber 1, resistance noise reduction section 2 and the first bend muffler
21 and second bend muffler 22, their wall surface can from outside to inside, by steel plate, steel skeleton, mineral wool, elastic construction glue,
Plasterboard, glass fiber felt and the zinc-plated punched steel plate of paper fire resisting are combined.It is shown in Figure 5, with the first bend muffler 21
For wall surface (i.e. side wall), illustrate specific composite construction.
It is shown in Figure 5, the wall structure of first bend muffler 21 are as follows: including hollow steel skeleton 8, the reinforcing bar
The external fixation of frame 8 is covered with steel plate 7, and the inside of the steel skeleton 8 is bonded with plasterboard 10 (especially by elastic construction glue),
Filled with one layer of first mineral wool 91, (i.e. glass fibre is specifically filled in steel plate 7 and gypsum for absorbing sound in the steel skeleton 8
Position between plate 10)；
The inside covering of the plasterboard 10 is filled with one layer of second mineral wool 92, and the inside of second mineral wool 92 is covered
It is stamped layer of glass fiber felt, the inner sidewall of the glass fiber felt is fixed with zinc-plated punched steel plate 13.
It is reticulated it should be noted that glass fiber felt refers to by glass fiber single filament intertexture, is solidified with resin binder
Adhesive-bonded fabric
In specific implementation, first mineral wool 91 and the second mineral wool 92 can be identical mineral wool.
In specific implementation, the zinc-plated punched steel plate 13 is the zinc-plated punched steel plate in outer surface, the zinc-plated punched steel plate
13 punching rate is equal to 40%.
In the present invention, it should be noted that in specific implementation, the reactive muffling section 3 includes the first expansion chambers
Silencer 31 and the second Extonsion Group 32, wall structure only include steel plate 7, steel skeleton 8, the first mineral wool 91, gypsum
Plate 10 is free of the second mineral wool 92, glass fiber felt and zinc-plated punched steel plate 13.Other wall structures all with the first bend muffler 21
Wall structure it is identical.
Based on above technical scheme it is found that for the utility model, metal is cleverly arranged in exhausting silencer channel
Wedge absorber, travelling-wave tubes generated high very noisy during high intensity sonic travelling wave test can be effectively reduced, and
Influence of the reflected sound to measuring accuracy is effectively reduced；The utility model can solve high sound intensity by the way that bend muffler is rationally arranged
The limited problem of travelling-wave tubes test space；The utility model, can using the design of sectional, the universal wheel of each section locking
So that dismounting, being mobile more convenient.
For the utility model, its purpose is to provide a kind of exhausting silencer dedicated for high intensity sonic travelling wave test is logical
Road does not influence measuring accuracy, high-efficient wide-frequency sound absorption, the requirement that occupied area is smaller, convenient for disassembly and assembly to meet.
For the utility model, in specific implementation, actual total length can be no more than 8.6m, and 50Hz may be implemented
Total sound deadening capacity > 50dB in~500Hz frequency range, and guarantee the basic zero deflection of noise spectrum shape in travelling-wave tubes, performance is excellent
It is different；Further, since material used in the utility model is non-ignitable or fire retardant material, therefore can be adapted for high sound intensity traveling wave
Pipe pilot system carries out the thermal noise test after functions expanding.In addition, the appearance of the utility model be galvanized steel plain sheet, can paint on
Color, the characteristics of showing enterprise.
It is provided by the utility model a kind of for high intensity sonic travelling wave test in conclusion compared with prior art
Exhausting silencer channel can be effectively reduced travelling-wave tubes generated high very noisy during high intensity sonic travelling wave test,
The noise pollution caused by external surrounding enviroment is reduced, the health of people is safeguarded, is conducive to widely promoting and applying, is had
There is great production practices meaning.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (10)
1. a kind of exhausting silencer channel for high intensity sonic travelling wave test, which is characterized in that including hollow reflection suppression chamber
(1), resistance noise reduction section (2) and reactive muffling section (3), in which:
The left and right ends of the resistance noise reduction section (2) pass through flange (5) and the reflection suppression chamber (1) and reactive muffling section respectively
(3) it is tightly connected；
Multiple wedge absorbers (11) are distributed in the inner wall of the reflection suppression chamber (1).
2. exhausting silencer channel as described in claim 1, which is characterized in that the flange (5) is the flange with gasket.
3. exhausting silencer channel as described in claim 1, which is characterized in that the left end of the reflection suppression chamber (1) and loud
By force in wave duct pilot system travelling-wave tubes the corresponding connection in end.
4. exhausting silencer channel as described in claim 1, which is characterized in that the left end of the reflection suppression chamber (1) have into
Port (12)；
Flange (5) between the resistance noise reduction section (2) and the reflection suppression chamber (1) to interface, with the reflection suppression
The air inlet (12) of the left end of chamber (1) is staggered completely.
5. exhausting silencer channel as claimed in claim 4, which is characterized in that reflection suppression chamber (1) inner wall and it is described into
The corresponding position of port (12), and flange (5) between the resistance noise reduction section (2) the reflection suppression chamber (1)
To multiple wedge absorbers (11) on the corresponding position of interface, are distributed with.
6. exhausting silencer channel as described in claim 1, which is characterized in that the wedge absorber (11) is off frequency and is
The wedge absorber of 50Hz.
7. exhausting silencer channel as described in claim 1, which is characterized in that the resistance noise reduction section (2) includes the first noise elimination
Elbow (21) and the second bend muffler (22), first bend muffler (21) and the second bend muffler (22) pass through described in one
Flange (5) is connected；
The left end of first bend muffler (21) and the right end of the reflection suppression chamber (1) pass through flange (5) phase
Connection, the right end of second bend muffler (22) are connected with the reactive muffling section (3) by a flange (5).
8. exhausting silencer channel as described in claim 1, which is characterized in that the reactive muffling section (3) includes the first expansion
Room silencer (31) and the second Extonsion Group (32), first Extonsion Group (31) and the second Extonsion Group
(32) it is connected by a flange (5)；
The right end of the left end of first Extonsion Group (31) and the resistance noise reduction section (2) passes through a flange
(5) it is connected.
9. exhausting silencer channel as claimed in claim 8, which is characterized in that the right end of second Extonsion Group (32)
The protective net (4) of one steel is installed；
The bottom of the reflection suppression chamber (1), resistance noise reduction section (2) and reactive muffling section (3) is separately installed with 10,000
To wheel (6).
10. exhausting silencer channel as claimed in any one of claims 1-9 wherein, which is characterized in that first bend muffler
(21) wall structure are as follows: including hollow steel skeleton (8), the external fixation of the steel skeleton (8) is covered with steel plate (7), institute
It states and is bonded on the inside of steel skeleton (8) plasterboard (10), one layer of first mineral wool (91) is filled in the steel skeleton (8)；
The inside covering of the plasterboard (10) is filled with one layer of second mineral wool (92), the inside of second mineral wool (92)
It is covered with layer of glass fiber felt, the inner sidewall of the glass fiber felt is fixed with zinc-plated punched steel plate (13)；
The wall structure of the reflection suppression chamber (1) and resistance noise reduction section (2), the wall surface knot with first bend muffler (21)
Structure is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820623458.6U CN208368153U (en) | 2018-04-28 | 2018-04-28 | A kind of exhausting silencer channel for high intensity sonic travelling wave test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820623458.6U CN208368153U (en) | 2018-04-28 | 2018-04-28 | A kind of exhausting silencer channel for high intensity sonic travelling wave test |
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| CN208368153U true CN208368153U (en) | 2019-01-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550362A (en) * | 2018-04-28 | 2018-09-18 | 天津航天瑞莱科技有限公司 | A kind of exhausting silencer channel for high intensity sonic travelling wave experiment |
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2018
- 2018-04-28 CN CN201820623458.6U patent/CN208368153U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550362A (en) * | 2018-04-28 | 2018-09-18 | 天津航天瑞莱科技有限公司 | A kind of exhausting silencer channel for high intensity sonic travelling wave experiment |
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