CN205602103U - Low noise helicopter - Google Patents
Low noise helicopter Download PDFInfo
- Publication number
- CN205602103U CN205602103U CN201620411267.4U CN201620411267U CN205602103U CN 205602103 U CN205602103 U CN 205602103U CN 201620411267 U CN201620411267 U CN 201620411267U CN 205602103 U CN205602103 U CN 205602103U
- Authority
- CN
- China
- Prior art keywords
- noise
- layer
- cabin
- sound
- inhaling
- 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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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
Abstract
The utility model relates to a low noise helicopter belongs to the aircraft field. The utility model aims to provide a low noise helicopter, the noise in its cabin is little. Including the organism, be equipped with the cabin on the organism it eliminates the layer to be equipped with noise adsorption layer and noise on the inner wall in cabin, the noise is eliminated the laminating and is closed the inner wall in cabin, the noise adsorption laminating closes the noise and eliminates the layer a plurality of sound holes of inhaling of noise adsorption layer surface equipartition, the noise adsorption layer is eliminated the layer with the noise and is linked together through inhaling the sound hole, and installs common vibration -damping sheet in inhaling the sound hole, vibration -damping sheet one end is fixed in the inner wall of inhaling the sound hole altogether, and the other end extends to the center of inhaling the sound hole, the layer is eliminated including inhaling cotton layer of sound and the fixed base plate of inhaling the cotton layer of sound to the noise, inhale the cotton level of sound between base plate and noise adsorption layer. This low noise helicopter passes through the noise adsorption layer and the common noise that gets into in the cabin that absorbs in layer is eliminated to the noise to play the effect that reduces the noise in the cabin.
Description
Technical field
This utility model belongs to aircraft field, particularly a kind of low noise helicopter.
Background technology
Helicopter noise is essentially from rotor, tail-rotor, electromotor, decelerator and drive system etc..The noise of external environment condition, main
Will from rotor and tail-rotor, and the noise in cabin mostly come from reducer gear engagement and electromotor.But reducer gear
The noise decibel that engagement and electromotor produce is big, and the persistent period is long.Have a strong impact on the personnel in cabin, in order to reduce the shadow of noise
Ringing, the personnel in cabin must bring special earmuff and earphone.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of low noise helicopter, and the noise in its cabin is little.
The technical solution adopted in the utility model is: a kind of low noise helicopter, including body, is provided with cabin on body,
The inwall in described cabin is provided with noise absorption layer and noise eliminating layer, the inwall in described noise eliminating layer laminating cabin, described in make an uproar
Sound absorbed layer laminating noise eliminating layer, at the uniform multiple sound-absorption hole in described noise absorption layer surface, described noise absorption layer and noise
Eliminating layer is connected by sound-absorption hole, and is provided with resonance plate in sound-absorption hole, and the interior of sound-absorption hole is fixed in described resonance plate one end
Wall, the other end extends to the center of sound-absorption hole；Described noise eliminating layer includes acoustical cotton layer and the substrate of fixing acoustical cotton layer, institute
State acoustical cotton layer between substrate and noise absorption layer.
Further, the back side of described substrate is fixed with the fixing nail of multiple acoustical cotton, and described acoustical cotton layer is plugged on acoustical cotton and fixes
Nail on.
Further, described substrate is adhesively fixed with the inwall in cabin.
The beneficial effects of the utility model are: this one low noise helicopter, and the inwall in cabin is provided with noise absorption layer and noise
Eliminating layer, multiple sound-absorption hole on noise absorption layer surface, play the effect absorbing noise, the noise absorbed by noise absorption layer passes
It is delivered to noise eliminating layer, enters acoustical cotton layer, absorbed by acoustical cotton layer, and the natural frequency of the resonance plate in sound-absorption hole and noise
Frequency identical, noise and resonance plate resonate, and quite a few noise is consumed when resonance and is converted into heat energy, is inhaled by noise
Receive layer and noise eliminating layer is absorbed into the noise in cabin jointly, thus play the effect of the noise reduced in cabin.
Accompanying drawing explanation
Fig. 1 is this utility model schematic diagram.
Fig. 2 is partial enlarged drawing 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,
Acoustical cotton fixes nail 8, resonance plate 9.
Detailed description of the invention
With embodiment, this utility model is described further below in conjunction with the accompanying drawings.
A kind of low noise helicopter, as depicted in figs. 1 and 2, including body 1, is provided with cabin 2, at described machine on body 1
The inwall in cabin 2 is provided with noise absorption layer 3 and noise eliminating layer 4, and described noise eliminating layer 4 is fitted the inwall in cabin 2, institute
Stating noise absorption layer 3 to fit noise eliminating layer 4, in the uniform multiple sound-absorption hole 5 in described noise absorption layer 3 surface, described noise is inhaled
Receive layer 3 to be connected by sound-absorption hole 5 with noise eliminating layer 4, and resonance plate 9 is installed in sound-absorption hole 5, described resonance plate 9
The inwall of sound-absorption hole 5 is fixed in one end, and the other end extends to the center of sound-absorption hole 5；Described noise eliminating layer 4 includes acoustical cotton
Layer 6 and the substrate 7 of fixing acoustical cotton layer 6, described acoustical cotton layer 6 is between substrate 7 and noise absorption layer 3.
This one low noise helicopter, the inwall in cabin 2 is provided with noise absorption layer 3 and noise eliminating layer 4, noise absorption layer 3
Multiple sound-absorption hole 5 on surface, play absorb noise effect, the noise transmission absorbed by noise absorption layer 3 to noise eliminating layer 4,
Enter acoustical cotton layer 6, absorbed by acoustical cotton layer 6, and the frequency phase of the natural frequency of the resonance plate 9 in sound-absorption hole 5 and noise
With, noise resonates with resonance plate 9, and quite a few noise is consumed when resonance and is converted into heat energy, by noise absorption layer 3
Jointly it is absorbed into the noise in cabin 2 with noise eliminating layer 4, thus plays the effect of the noise reduced in cabin.
Acoustical cotton layer 6 can be bonded in the back side of substrate 7 with glue, but glue easily lost efficacy, and has pollution.Accordingly, as
Preferably, the back side of described substrate 7 is fixed with multiple acoustical cotton and fixes nail 8, and described acoustical cotton layer 6 is plugged on acoustical cotton and fixes nail 8
On.
Further, described substrate 7 is adhesively fixed with the inwall in cabin 2.The inwall processing that avoids in cabin 2 is adhesively fixed
The structure such as hole, groove, maintains the integrity of cabin 2 inwall.
Claims (3)
1. a low noise helicopter, including body (1), is provided with cabin (2) on body (1), it is characterised in that:
The inwall in described cabin (2) is provided with noise absorption layer (3) and noise eliminating layer (4), and described noise eliminating layer (4) is fitted
The inwall in cabin (2), described noise absorption layer (3) laminating noise eliminating layer (4), on described noise absorption layer (3) surface
Uniform multiple sound-absorption hole (5), described noise absorption layer (3) is connected by sound-absorption hole (5) with noise eliminating layer (4), and
Being provided with resonance plate (9) in sound-absorption hole (5), the inwall of sound-absorption hole (5) is fixed in described resonance plate (9) one end, another
End extends to the center of sound-absorption hole (5)；Described noise eliminating layer (4) includes acoustical cotton layer (6) and fixing acoustical cotton layer (6)
Substrate (7), described acoustical cotton layer (6) is positioned between substrate (7) and noise absorption layer (3).
2. a kind of low noise helicopter as claimed in claim 1, it is characterised in that: the back side of described substrate (7) is fixed with
The fixing nail (8) of multiple acoustical cottons, described acoustical cotton layer (6) is plugged on the fixing nail (8) of acoustical cotton.
3. a kind of low noise helicopter as claimed in claim 1, it is characterised in that: described substrate (7) and cabin (2)
Inwall is adhesively fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620411267.4U CN205602103U (en) | 2016-05-09 | 2016-05-09 | Low noise helicopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620411267.4U CN205602103U (en) | 2016-05-09 | 2016-05-09 | Low noise helicopter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205602103U true CN205602103U (en) | 2016-09-28 |
Family
ID=56969453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620411267.4U Expired - Fee Related CN205602103U (en) | 2016-05-09 | 2016-05-09 | Low noise helicopter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205602103U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105947175A (en) * | 2016-05-09 | 2016-09-21 | 四川马可视觉网络科技有限公司 | Low-noise helicopter |
-
2016
- 2016-05-09 CN CN201620411267.4U patent/CN205602103U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105947175A (en) * | 2016-05-09 | 2016-09-21 | 四川马可视觉网络科技有限公司 | Low-noise helicopter |
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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: 20160928 Termination date: 20170509 |