CN204926787U - Combined sound absorption overburden of cylindrical cavity - Google Patents
Combined sound absorption overburden of cylindrical cavity Download PDFInfo
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- CN204926787U CN204926787U CN201520561993.XU CN201520561993U CN204926787U CN 204926787 U CN204926787 U CN 204926787U CN 201520561993 U CN201520561993 U CN 201520561993U CN 204926787 U CN204926787 U CN 204926787U
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- sound
- absorbing hole
- layer
- absorbing
- cylindrical cavity
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- 238000010521 absorption reaction Methods 0.000 title abstract description 20
- 238000013016 damping Methods 0.000 claims abstract description 25
- 238000000576 coating method Methods 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 23
- 230000002745 absorbent Effects 0.000 claims description 22
- 239000002250 absorbent Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 17
- 229920005549 butyl rubber Polymers 0.000 claims description 6
- 239000007767 bonding agent Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract 2
- 238000005728 strengthening Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
本实用新型公开了一种圆柱空腔组合型吸声覆盖层，包括依次设置的阻尼层（1）、加强层（2）和吸声层（3），所述阻尼层（1）的一侧与水下运动体的壳体表面相贴合，所述吸声层（3）上呈阵列状分布有吸声孔（4）。本实用新型所述阻尼层、加强层和吸声层采用不用的材料制作而成，阻尼层的一侧与水下运动体的壳体表面相贴合，有效避免吸声覆盖层与水下运动体壳体表面的相对滑动，同时还能起到减振吸声的作用；加强层使整个吸声覆盖层具有一定的力学强度；吸声层具有良好的宽频带吸声性能。
The utility model discloses a cylindrical cavity combined sound-absorbing covering layer, which comprises a damping layer (1), a strengthening layer (2) and a sound-absorbing layer (3) arranged in sequence, and one side of the damping layer (1) Fitted with the shell surface of the underwater moving body, sound-absorbing holes (4) are distributed in an array on the sound-absorbing layer (3). The damping layer, reinforcing layer and sound-absorbing layer of the utility model are made of unused materials, and one side of the damping layer fits the surface of the shell of the underwater moving body, effectively avoiding the sound-absorbing covering layer and the underwater movement. The relative sliding of the surface of the body shell can also play the role of vibration reduction and sound absorption; the reinforcing layer makes the entire sound-absorbing covering layer have a certain mechanical strength; the sound-absorbing layer has good broadband sound-absorbing performance.
Description
Technical field
The utility model relates to a kind of device of vibration and noise reducing, specifically the combined anechoic coating of a kind of cylindrical cavity, belongs to vibration and noise reducing apparatus field.
Background technology
Sound wave be only in ocean can the form of energy of long-distance communications, in current and predictable future, undersea detection will rely on the change of detection sound field.Therefore, the major measure that self radiated noise and sound reflection characteristics just become underwater moving body Sound stealth is reduced.
Reduce self radiated noise and sound reflection characteristics is a systematic engineering of business, need to carry out overall acoustic design.Anechoic coating, as the outermost acoustic protection layer of underwater moving body, can not only absorb most detection sound wave, can also reduce self-noise to a certain extent to external radiation.
Current underwater sound absorption overlayer is made up of the single elastomeric material with high loss usually, and be made into and include the flat board of given shape cavity as cylindrical cavity, this class formation has good sound absorbing capabilities in certain frequency band.But this class formation sound sucting band is narrower, obtain broad band sound absorption effect if want, its structural thickness is sufficiently long.And the low frequency absorption performance of this class formation is not good enough yet, to improve low frequency absorption characteristic, the porosity that just must increase cavity radius or increase shared by cavity, but porosity increase can cause again the compressive property of structure to decline.In addition, most of anechoic coating adopts adhesive or coating method to be arranged on rigid structure surface, complicated construction technique, and the engineering time is long.
The theory and practice research of the combined anechoic coating of cylindrical cavity shows, its broad band sound absorption performance is obvious, and effect of low-frequency sound absorption is also significantly improved.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of cylindrical cavity combined anechoic coating, effectively can widen sound sucting band, improve low frequency absorption performance, and have certain noise reduction performance concurrently.
The purpose of this utility model is achieved through the following technical solutions:
The combined anechoic coating of a kind of cylindrical cavity, comprise the damping layer, enhancement Layer and the absorbent treatment that set gradually, the side of described damping layer and the surface of shell of underwater moving body fit, and described absorbent treatment is distributed with sound-absorbing hole in array-like.
Preferably, described absorbent treatment is provided with sealing layer.Sealing layer is used for sealing described sound-absorbing hole.
Further, described sound-absorbing hole comprises the first sound-absorbing hole and the second sound-absorbing hole, and the aperture of described first sound-absorbing hole is less than the aperture of the second sound-absorbing hole.The first sound-absorbing hole that aperture is little, can ensure good high frequency sound absorbing capabilities, but low frequency absorption is poor; The second sound-absorbing hole that aperture is large, can ensure good low frequency absorption performance, but high frequency sound absorption is poor; The structure adopting the first sound-absorbing hole and the second sound-absorbing hole to cooperatively interact, can widen frequency band, takes into account high and low frequency sound absorption.
Optionally, the inside surface of described first sound-absorbing hole is straight cylindrical surfaces or circular conical surface.
Optionally, the inside surface of described second sound-absorbing hole is straight cylindrical surfaces or circular conical surface.
Optionally, the first sound-absorbing hole around described each second sound-absorbing hole is square distribution, and the first sound-absorbing hole is positioned at the summit place of described square.
Optionally, the first sound-absorbing hole around described each second sound-absorbing hole is regular hexagon distribution, and the first sound-absorbing hole is positioned at described orthohexagonal summit place.
Preferably, described damping layer adopts butyl rubber to make, and described enhancement Layer adopts glass fabric to make, and described absorbent treatment and sealing layer adopt butyl rubber or polycarbamate to make.
Further, described damping layer, enhancement Layer, absorbent treatment and sealing layer are integrated hot-forming.
Optionally, described damping layer, enhancement Layer, absorbent treatment and sealing layer successively by bonding agent bonding and one cold briquetting.
Compared with prior art, the beneficial effects of the utility model are as follows:
1, described damping layer, enhancement Layer and absorbent treatment adopt no material to be made, the side of damping layer and the surface of shell of underwater moving body fit, effectively avoid the relative sliding of anechoic coating and underwater moving body surface of shell, the effect of vibration damping sound absorption can also be played simultaneously.Enhancement Layer makes whole anechoic coating have certain mechanical strength.
The structure that first sound-absorbing hole of the employing different pore size 2, on absorbent treatment and the second sound-absorbing hole cooperatively interact, can widen frequency band, takes into account high and low frequency sound absorption.
3, the first sound-absorbing hole and the second sound-absorbing hole are respectively in cylindric or coniform, except can effectively improve except sound absorbing capabilities, underwater moving body self noise also can be suppressed to external radiation, and structure is simply convenient to make.
4, the first sound-absorbing hole and the second sound-absorbing hole are different distribution shapes, make absorbent treatment have different porositys, can meet sound absorbing capabilities requirement under the different environment for use of underwater moving body.
5, anechoic coating material described in the utility model easily obtains, adopts integrated hot pressing formed or the bonding rear cold briquetting of bonding agent, and moulding process is simple, cost is low.
Accompanying drawing explanation
Fig. 1 is the utility model perspective view;
Fig. 2 is the utility model structure vertical view;
Fig. 3 is that Fig. 2 is along A-A cut-open view;
The structural representation that Fig. 4 is the first sound-absorbing hole described in the utility model and the second sound-absorbing hole when being coniform;
Schematic diagram during Fig. 5 to be the first sound-absorbing hole described in the utility model be regular hexagon distribution;
Description of reference numerals: 1, damping layer; 2, enhancement Layer; 3, absorbent treatment; 4, sound-absorbing hole; 41, the first sound-absorbing hole; 42, the second sound-absorbing hole; 5, sealing layer.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, utility model is described further:
As shown in Figure 1, Figure 2 and Figure 3, the combined anechoic coating of a kind of cylindrical cavity, comprise the damping layer 1, enhancement Layer 2, absorbent treatment 3 and the sealing layer 5 that set gradually, the described side of damping layer 1 and the surface of shell of underwater moving body fit, and described absorbent treatment 3 is distributed with sound-absorbing hole 4 in array-like; Described damping layer 1 adopts butyl rubber to make, and damping layer 1 effectively can avoid the relative sliding of anechoic coating and underwater moving body surface of shell, can also play the effect of vibration damping sound absorption simultaneously; Described enhancement Layer 2 adopts glass fabric to make, and enhancement Layer makes whole anechoic coating have certain mechanical strength; Described absorbent treatment 3 and sealing layer 5 adopt butyl rubber or polycarbamate to make, and sealing layer 5 is for sealing described sound-absorbing hole.
As further improvement of this embodiment, described sound-absorbing hole 4 comprises the first sound-absorbing hole 41 and the second sound-absorbing hole 42, and the aperture of described first sound-absorbing hole 41 is less than the aperture 42 of the second sound-absorbing hole.The first sound-absorbing hole 41 that aperture is little, can ensure good high frequency sound absorbing capabilities, but low frequency absorption is poor; The second sound-absorbing hole 42 that aperture is large, can ensure good low frequency absorption performance, but high frequency sound absorption is poor; The structure adopting the first sound-absorbing hole 41 and the second sound-absorbing hole 42 to cooperatively interact, can widen frequency band, takes into account high and low frequency sound absorption.
As shown in Figure 3 and Figure 4, further, the inside surface of described first sound-absorbing hole 41 is straight cylindrical surfaces or circular conical surface, the inside surface of described second sound-absorbing hole 42 is straight cylindrical surfaces or circular conical surface, the first sound-absorbing hole 41 of similar shape and the second sound-absorbing hole 42 is adopted to cooperatively interact, effectively can reduce the noise of underwater moving body self to external radiation, and structure is simple.
Further, the first sound-absorbing hole 41 distribution in square around described each second sound-absorbing hole 42, and the first sound-absorbing hole 41 is positioned at the summit place of described square.
As shown in Figure 5, as a kind of optional embodiment, the first sound-absorbing hole 41 distribution in regular hexagon around described each second sound-absorbing hole 42, and the first sound-absorbing hole position 41 is in described orthohexagonal summit place.First sound-absorbing hole 41 and the second sound-absorbing hole 42, in different distribution shapes, make absorbent treatment 3 have different porositys, can meet sound absorbing capabilities requirement under the different environment for use of underwater moving body.
Preferably, described damping layer 1, enhancement Layer 2, absorbent treatment 3 and sealing layer 5 adopt integrated hot pressing formed, and therefore the moulding process of anechoic coating is simple, cost is low.
As another kind of optional embodiment, described damping layer 1, enhancement Layer 2, absorbent treatment 3 and sealing layer 5 successively by bonding agent bonding and one cold briquetting.That is, bonding agent is coated on respect to one another of every adjacent two layers respectively, bonding complete after one cold briquetting, therefore firmly bonding between each layer of anechoic coating.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection domain of the present utility model.
Claims (8)
1. the combined anechoic coating of cylindrical cavity, it is characterized in that: comprise the damping layer (1), enhancement Layer (2) and the absorbent treatment (3) that set gradually, the side of described damping layer (1) and the surface of shell of underwater moving body fit, described absorbent treatment (3) is upper is distributed with sound-absorbing hole (4) in array-like, described sound-absorbing hole (4) comprises the first sound-absorbing hole (41) and the second sound-absorbing hole (42), the aperture of described first sound-absorbing hole (41) is less than the aperture of the second sound-absorbing hole (42), described absorbent treatment (3) is provided with sealing layer (5).
2. the combined anechoic coating of a kind of cylindrical cavity according to claim 1, is characterized in that: described first sound-absorbing hole (41) inside surface is straight cylindrical surfaces or circular conical surface.
3. the combined anechoic coating of a kind of cylindrical cavity according to claim 1, is characterized in that: described second sound-absorbing hole (42) inside surface is straight cylindrical surfaces or circular conical surface.
4. the combined anechoic coating of a kind of cylindrical cavity according to claim 1, it is characterized in that: described each second sound-absorbing hole (42) the first sound-absorbing hole (41) around distributes in square, and the first sound-absorbing hole (41) is positioned at the summit place of described square.
5. the combined anechoic coating of a kind of cylindrical cavity according to claim 1, it is characterized in that: described each second sound-absorbing hole (42) the first sound-absorbing hole (41) around distributes in regular hexagon, and the first sound-absorbing hole (41) is positioned at described orthohexagonal summit place.
6. the combined anechoic coating of a kind of cylindrical cavity according to claim 1, it is characterized in that: described damping layer (1) adopts butyl rubber to make, described enhancement Layer (2) adopts glass fabric to make, and described absorbent treatment (3) and sealing layer (5) adopt butyl rubber or polycarbamate to make.
7. the combined anechoic coating of a kind of cylindrical cavity according to claim 6, is characterized in that: described damping layer (1), enhancement Layer (2), absorbent treatment (3) and sealing layer (5) are integrated hot-forming.
8. the combined anechoic coating of a kind of cylindrical cavity according to claim 6, is characterized in that: described damping layer (1), enhancement Layer (2), absorbent treatment (3) and sealing layer (5) successively by bonding agent bonding and one cold briquetting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520561993.XU CN204926787U (en) | 2015-07-30 | 2015-07-30 | Combined sound absorption overburden of cylindrical cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520561993.XU CN204926787U (en) | 2015-07-30 | 2015-07-30 | Combined sound absorption overburden of cylindrical cavity |
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| Publication Number | Publication Date |
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| CN204926787U true CN204926787U (en) | 2015-12-30 |
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| CN201520561993.XU Expired - Fee Related CN204926787U (en) | 2015-07-30 | 2015-07-30 | Combined sound absorption overburden of cylindrical cavity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110223667A (en) * | 2019-06-14 | 2019-09-10 | 哈尔滨工程大学 | A kind of Composite Hollow acoustic baffle |
| CN110444188A (en) * | 2019-07-30 | 2019-11-12 | 华中科技大学 | A kind of underwater perforation mixing cavity structure acoustic stimulation |
| CN116959396A (en) * | 2023-09-20 | 2023-10-27 | 江苏建声影视设备研制有限公司 | Perforated alloy sound absorption and reflection multilayer alloy plate and preparation process thereof |
-
2015
- 2015-07-30 CN CN201520561993.XU patent/CN204926787U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110223667A (en) * | 2019-06-14 | 2019-09-10 | 哈尔滨工程大学 | A kind of Composite Hollow acoustic baffle |
| CN110444188A (en) * | 2019-07-30 | 2019-11-12 | 华中科技大学 | A kind of underwater perforation mixing cavity structure acoustic stimulation |
| CN110444188B (en) * | 2019-07-30 | 2021-08-03 | 华中科技大学 | An underwater perforated hybrid cavity structure acoustic cover |
| CN116959396A (en) * | 2023-09-20 | 2023-10-27 | 江苏建声影视设备研制有限公司 | Perforated alloy sound absorption and reflection multilayer alloy plate and preparation process thereof |
| CN116959396B (en) * | 2023-09-20 | 2023-12-15 | 江苏建声影视设备研制有限公司 | Perforated alloy sound absorption and reflection multilayer alloy plate and preparation process thereof |
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| 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 |
Granted publication date: 20151230 Termination date: 20210730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |