CN105947175B - A kind of low noise helicopter - Google Patents
A kind of low noise helicopter Download PDFInfo
- Publication number
- CN105947175B CN105947175B CN201610301772.8A CN201610301772A CN105947175B CN 105947175 B CN105947175 B CN 105947175B CN 201610301772 A CN201610301772 A CN 201610301772A CN 105947175 B CN105947175 B CN 105947175B
- Authority
- CN
- China
- Prior art keywords
- noise
- layer
- absorption
- cabin
- sound
- 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
- 238000010521 absorption reaction Methods 0.000 claims abstract description 52
- 229920000742 Cotton Polymers 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 239000003292 glue Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims 1
- 108010066114 cabin-2 Proteins 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/40—Sound or heat insulation, e.g. using insulation blankets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
A kind of low noise helicopter of the present invention, belongs to aircraft field.Purpose is to provide a kind of low noise helicopter, and the noise in cabin is small.Including body, cabin is equipped on body, noise absorption layer and noise eliminating layer are equipped on the inner wall of the cabin, the inner wall of the noise eliminating layer fitting cabin, the noise absorption layer are bonded noise eliminating layer, multiple sound-absorption holes are evenly distributed in the noise absorption layer surface, the noise absorption layer is connected with noise eliminating layer by sound-absorption hole, and resonance plate is installed in sound-absorption hole, the inner wall of sound-absorption hole is fixed in described resonance plate one end, and the other end extends to the center of sound-absorption hole；The noise eliminating layer includes the substrate of acoustical cotton layer and fixed acoustical cotton layer, and the acoustical cotton layer is between substrate and noise absorption layer.A kind of low noise helicopter is absorbed into the noise in cabin jointly by noise absorption layer and noise eliminating layer, to play the role of reducing the noise in cabin.
Description
Technical field
The invention belongs to aircraft field, a kind of particularly low noise helicopter.
Background technology
Helicopter noise is essentially from rotor, tail-rotor, engine, retarder and transmission system etc..The noise of external environment,
Essentially from rotor and tail-rotor, and the noise in cabin mostlys come from reducer gear engagement and engine.However retarder
The noise decibel that gear engages and engine generates is big, and the duration is long.The personnel in cabin are seriously affected, in order to reduce noise
Influence, the personnel in cabin must take special earmuff and earphone.
Invention content
Technical problem to be solved by the invention is to provide a kind of low noise helicopter, the noise in cabin is small.
The technical solution adopted by the present invention is：A kind of low noise helicopter, including body are equipped with cabin on body,
The inner wall of the cabin is equipped with noise absorption layer and noise eliminating layer, and the inner wall of the noise eliminating layer fitting cabin is described
Noise absorption layer is bonded noise eliminating layer, and multiple sound-absorption holes be evenly distributed in the noise absorption layer surface, the noise absorption layer and
Noise eliminating layer is connected by sound-absorption hole, and resonance plate is equipped in sound-absorption hole, and sound-absorbing is fixed in described resonance plate one end
The inner wall in hole, the other end extend to the center of sound-absorption hole；The noise eliminating layer includes acoustical cotton layer and fixed acoustical cotton layer
Substrate, the acoustical cotton layer is between substrate and noise absorption layer.
Further, the back side of the substrate is fixed with multiple acoustical cotton fixing glues, and the acoustical cotton layer is plugged on sound-absorbing
In cotton fixing glue.
Further, the substrate and the inner wall of cabin are adhesively fixed.
The beneficial effects of the invention are as follows：The inner wall of a kind of low noise helicopter, cabin is equipped with noise absorption layer and makes an uproar
Sound eliminating layer, multiple sound-absorption holes of noise absorption layer surface play the role of absorbing noise, the noise absorbed by noise absorption layer
Be transmitted to noise eliminating layer, into acoustical cotton layer, absorbed by acoustical cotton layer, and the intrinsic frequency of the resonance plate in sound-absorption hole with make an uproar
The frequency of sound is identical, and noise resonates with resonance plate, quite a few noise is consumed in resonance and is converted into thermal energy, passes through noise
Absorbed layer and noise eliminating layer are absorbed into the noise in cabin jointly, to play the role of reducing the noise in cabin.
Description of the drawings
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is partial enlarged view at the A of Fig. 1.
In figure, body 1, cabin 2, noise absorption layer 3, noise eliminating layer 4, sound-absorption hole 5, acoustical cotton layer 6, substrate 7, sound-absorbing
Cotton fixing glue 8, resonance plate 9.
Specific implementation mode
The present invention is described further with reference to the accompanying drawings and examples.
A kind of low noise helicopter, as depicted in figs. 1 and 2, including body 1, cabin 2 is equipped on body 1, in the machine
The inner wall in cabin 2 is equipped with noise absorption layer 3 and noise eliminating layer 4, and the noise eliminating layer 4 is bonded the inner wall of cabin 2, described to make an uproar
Sound absorbed layer 3 is bonded noise eliminating layer 4, and multiple sound-absorption holes 5, the noise absorption layer 3 are evenly distributed on 3 surface of noise absorption layer
It is connected by sound-absorption hole 5 with noise eliminating layer 4, and resonance plate 9 is installed in sound-absorption hole 5,9 one end of the resonance plate is fixed
In the inner wall of sound-absorption hole 5, the other end extends to the center of sound-absorption hole 5；The noise eliminating layer 4 includes acoustical cotton layer 6 and fixes
The substrate 7 of acoustical cotton layer 6, the acoustical cotton layer 6 is between substrate 7 and noise absorption layer 3.
The inner wall of a kind of low noise helicopter, cabin 2 is equipped with noise absorption layer 3 and noise eliminating layer 4, noise absorption
Multiple sound-absorption holes 5 on 3 surface of layer play the role of absorbing noise, and the noise transmission absorbed by noise absorption layer 3 to noise is eliminated
Layer 4, into acoustical cotton layer 6, is absorbed by acoustical cotton layer 6, and the frequency of the intrinsic frequency and noise of the resonance plate 9 in sound-absorption hole 5
Identical, noise resonates with resonance plate 9, quite a few noise is consumed in resonance and is converted into thermal energy, passes through noise absorption layer 3
It is absorbed into the noise in cabin 2 jointly with noise eliminating layer 4, to play the role of reducing the noise in cabin.
Acoustical cotton layer 6 can be bonded in the back side of substrate 7 with glue, however glue is vulnerable, and have pollution.Therefore, make
To be preferred, the back side of the substrate 7 is fixed with multiple acoustical cotton fixing glues 8, and the acoustical cotton layer 6 is plugged on acoustical cotton fixing glue
On 8.
Further, the substrate 7 and the inner wall of cabin 2 are adhesively fixed.The inner wall avoided in cabin 2 is adhesively fixed to add
The structures such as work hole, slot maintain the integrality of 2 inner wall of cabin.
Claims (1)
1. a kind of low noise helicopter, including body (1) are equipped with cabin (2) on body (1), it is characterised in that：In the machine
The inner wall in cabin (2) is equipped with noise absorption layer (3) and noise eliminating layer (4), noise eliminating layer (4) the fitting cabin (2)
Inner wall, noise absorption layer (3) the fitting noise eliminating layer (4), multiple sound-absorption holes are evenly distributed on noise absorption layer (3) surface
(5), the noise absorption layer (3) is connected with noise eliminating layer (4) by sound-absorption hole (5), and is equipped in sound-absorption hole (5)
The inner wall of sound-absorption hole (5) is fixed in resonance plate (9), described resonance plate (9) one end, and the other end extends to the center of sound-absorption hole (5)；
The noise eliminating layer (4) includes the substrate (7) of acoustical cotton layer (6) and fixed acoustical cotton layer (6), acoustical cotton layer (6) position
Between substrate (7) and noise absorption layer (3)；
The back side of the substrate (7) is fixed with multiple acoustical cotton fixing glues (8), and it is solid that the acoustical cotton layer (6) is plugged on acoustical cotton
On fixed nail (8)；
The substrate (7) and the inner wall of cabin (2) are adhesively fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610301772.8A CN105947175B (en) | 2016-05-09 | 2016-05-09 | A kind of low noise helicopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610301772.8A CN105947175B (en) | 2016-05-09 | 2016-05-09 | A kind of low noise helicopter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105947175A CN105947175A (en) | 2016-09-21 |
| CN105947175B true CN105947175B (en) | 2018-11-06 |
Family
ID=56914978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610301772.8A Expired - Fee Related CN105947175B (en) | 2016-05-09 | 2016-05-09 | A kind of low noise helicopter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105947175B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2018220961B2 (en) * | 2017-02-16 | 2020-04-09 | 3M Innovative Properties Company | Earmuff hearing-protection device comprising sound-attenuating members |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614231B (en) * | 2009-07-13 | 2012-06-27 | 长沙理工大学 | Broad-spectrum-filtration vibration-absorbing silencer of hydraulic system |
| CN201635345U (en) * | 2010-03-23 | 2010-11-17 | 北京静安天成噪声控制技术责任有限公司 | Beam-cavity resonance soundproofing inserting piece |
| US8413762B1 (en) * | 2011-12-08 | 2013-04-09 | Gulfstream Aerospace Corporation | Thermal-acoustic sections for an aircraft |
| WO2014010551A1 (en) * | 2012-07-12 | 2014-01-16 | 豊和繊維工業株式会社 | Soundproofing body and insulator for automobile |
| CN204139500U (en) * | 2014-08-14 | 2015-02-04 | 常州晟兴和板业有限公司 | A kind of acoustic ceiling |
| CN204250355U (en) * | 2014-11-03 | 2015-04-08 | 中国航空工业集团公司西安飞机设计研究所 | A kind of novel Soft Roll absorbing sound and lowering noise structure |
| CN205602103U (en) * | 2016-05-09 | 2016-09-28 | 四川马可视觉网络科技有限公司 | Low noise helicopter |
-
2016
- 2016-05-09 CN CN201610301772.8A patent/CN105947175B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105947175A (en) | 2016-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180926 Address after: 221331 18 group three, four hop village, industrial park, Pizhou, Xuzhou, Jiangsu Applicant after: Jiangsu Altman Electric Appliance Co., Ltd. Address before: 610055 No. 12, Zhong Lin Road, Shuang Lin, Chenghua District, Chengdu, Sichuan. Applicant before: SICHUAN MARK VISION NETWORK TECHNOLOGY CO., LTD. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181106 Termination date: 20190509 |
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| CF01 | Termination of patent right due to non-payment of annual fee |