CN109272980A - Soldering type slit honeycomb sound absorption structure - Google Patents
Soldering type slit honeycomb sound absorption structure Download PDFInfo
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- CN109272980A CN109272980A CN201811298198.0A CN201811298198A CN109272980A CN 109272980 A CN109272980 A CN 109272980A CN 201811298198 A CN201811298198 A CN 201811298198A CN 109272980 A CN109272980 A CN 109272980A
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- panel
- honeycomb
- sound absorption
- sandwich layer
- absorption structure
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 46
- 238000005476 soldering Methods 0.000 title claims abstract description 34
- 208000013201 Stress fracture Diseases 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- 230000000737 periodic effect Effects 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 17
- 238000003466 welding Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 9
- 239000011162 core material Substances 0.000 description 8
- 239000011358 absorbing material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000012792 core layer Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
Abstract
The present disclosure proposes a kind of soldering type slit honeycomb sound absorption structures comprising: first panel, second panel and the sandwich layer between the first panel and second panel;Wherein, the first panel is Microfracture plate, and the sandwich layer is honeycomb sandwich layer;It is soldering connection between the first panel, second panel and the honeycomb sandwich layer.Disclosure soldering type slit honeycomb sound absorption structure is arranged by Microfracture plate and sandwich layer, improves structural strength, improves sound absorption effect, is conducive to the use demand for meeting varying environment.
Description
Technical field
This disclosure relates to sqouynd absorption lowering noise technical field more particularly to a kind of soldering type slit honeycomb sound absorption structure.
Background technique
Current existing sound-absorbing material can be roughly divided into two types, and one kind is porous fibre type sound-absorbing material, another kind of to be
Resonance sound-absorbing material.Porous fibre sound-absorbing material is poor in the prevalence of weather resistance, can not adapt to rugged environment and influence the longevity
Life, and porous fibre type sound-absorbing material is to human health.Existing resonance sound-absorbing material is mainly perforated plate or micro- wears
Orifice plate, microperforated panel soundabsorbing construction are the one kind for being proposed and being developed by the famous acoustician's Ma Dayou academician in China the 1970s
Novel sound absorption structure, after microperforated panel absorbs sound theoretical be widely applied, Ma Dayou academician has also been proposed Theory of microslit absorbers,
The sound absorbing mechanism and porous plate acoustic adsorption device of Microfracture plate sound absorption are similar, are all built upon on resonance sound-absorbing basis, in sound wave
Under the action of, the vibration friction by air in opening wall surface makes sound energy loss due to viscous damping and conductive force.
The raising horizontal with machining with the development of science and technology, Microfracture plate has been able to process at present,
Sound absorbing performance is also more excellent, and the frequency band of sound absorption is also wider.Honeycomb sandwich construction connects aspect, at present panel (Microfracture plate) and bee
The connection of nest interlayer mainly uses gluing to connect, i.e., directly by honeycomb panel brush primer, glue film, then with bonding honeycomb core
And be put into hot pressing pipe and carry out solidification connection, however, its intensity, service life and the working environment of permission are largely by glue
The influence of stick performance.
Summary of the invention
(1) technical problems to be solved
Present disclose provides a kind of soldering type slit honeycomb sound absorption structures, at least partly to solve the above existing technology
Problem.
(2) technical solution
According to one aspect of the disclosure, a kind of soldering type slit honeycomb sound absorption structure is provided, comprising: first panel,
Second panel and the sandwich layer between the first panel and second panel;Wherein, the first panel is Microfracture plate, institute
Stating sandwich layer is honeycomb sandwich layer;It is soldering connection between the first panel, second panel and the honeycomb sandwich layer.
In some embodiments, the slit of multiple rectangles in the first panel with periodic arrangement or arc.
In some embodiments, the second panel is perforated plate.
In some embodiments, have in the second panel in square, triangle periodic arrangement multiple round holes.
In some embodiments, the material of the first panel, second panel and sandwich layer is metal.
In some embodiments, the material of the first panel, second panel and sandwich layer is aluminium.
In some embodiments, the honeycomb sandwich layer is hexagon cellular, quadrangle honeycomb or triangle honeycomb sandwich layer.
(3) beneficial effect
It can be seen from the above technical proposal that a kind of soldering type slit honeycomb sound absorption structure of the disclosure at least has and following has
One of beneficial effect:
(1) soldering type slit honeycomb sound absorption structure is arranged by Microfracture plate and honeycomb sandwich layer, improves sound absorption effect, favorably
In the use demand for meeting varying environment.
(2) Microfracture plate with honeycomb interlayer of existing sound absorption structure, which are connect, is mainly connected using gluing, disclosure honeycomb sandwich layer
It is connect between Microfracture plate and perforated plate for Welding, improves the reliability of sound absorption structure, improved bonding strength, increase
The service life of sound absorption structure.
(3) soldering type slit honeycomb sound absorption structure is formed using all-metal material Welding, does not have fiberfill fibers material,
With high temperature resistant and resistance to air blast impact, be not afraid of moist, pollution-free, dust, easy to clean, resistance be not small, structural strength is high, absorb sound
The advantages that effect is good, nontoxic, can be widely applied to the sound absorption of the varying environment in the fields such as building, ship, high-speed rail.
Detailed description of the invention
Fig. 1 is disclosure soldering type slit honeycomb sound absorption structure schematic diagram.
Fig. 2 is disclosure soldering type slit honeycomb sound absorption structure scheme of installation.
Fig. 3 is the rear panel structure schematic diagram of disclosure soldering type slit honeycomb sound absorption structure.
Fig. 4 is the sound absorption curve graph of disclosure soldering type slit honeycomb sound absorption structure.
<symbol description>
1- front panel, 2- honeycomb sandwich layer, 3- rear panel, 4- soldering type slit honeycomb sound absorption structure, 5- cavity, 6- installation
Face, 11- seam, the hole 31-.
Specific embodiment
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.
In one embodiment, as shown in Figure 1, the soldering type slit honeycomb sound absorption structure includes: front panel, intermediate core
Layer, rear panel are connected between front and back panels and intermediate core layer using Welding.It is tied the soldering type slit honeycomb absorbs sound
Structure is installed to a mounting surface 6 (such as metope), is had between the soldering type slit honeycomb sound absorption structure 4 and installation metope 6
There is a cavity 5, cavity depth D2, core layer thickness D1, as shown in Figure 2.
Existing panel is connect with honeycomb interlayer mainly to be connected using gluing, compared to the prior art, disclosure honeycomb sandwich layer
It is connect between Microfracture plate and perforated plate for Welding, improves the reliability of sound absorption structure, improved bonding strength, increase
The service life of sound absorption structure
Wherein, the front panel is the micro- of slit front panel, thereon multiple rectangles with periodic arrangement or arc
Seam, as shown in Figure 1.
The rear panel is conventional punch plate, has multiple round holes in square periodic arrangement thereon, as shown in Figure 3.
Certainly, multiple round holes in triangle periodic arrangement also be can have on the rear panel.
The present embodiment soldering type slit honeycomb sound absorption structure utilizes Microfracture plate, perforated plate and honeycomb sandwich layer between the two,
Preferable sound absorption effect is realized, as shown in Figure 4.
The front and back panels are metal material, generally using aluminium sheet as raw material;Sandwich layer is aluminum honeycomb or other gold
Belong to core material.The connection of front and back panels and intermediate core layer uses the processing technology of Welding, and mechanical property is much higher than glue
Viscous material, can effectively improve the structural strength of resonance sound-absorbing material.
Asking for solder caulking joint can effectively avoid when it carries out welding processing with intermediate core layer using this slit structure
Topic.
The aperture of the rear panel is generally 3~10mm, is 5mm in the present embodiment.
Optionally, the honeycomb sandwich layer is hexagon cellular, quadrangle honeycomb, triangle honeycomb sandwich layer.
Certainly, disclosure soldering type slit honeycomb sound absorption structure is not limited to the design parameter provided in embodiment, ability
For field technique personnel for the parameter of slit front panel, parameter, gap density, plate thickness and cavity depth including slit etc. can roots
It is designed according to actual being customized of noise circumstance.
In addition, disclosure soldering type slit honeycomb sound absorption structure uses all-metal material, there is no fiberfill fibers material, have
High temperature resistant and the impact of resistance to air blast are not afraid of that moist, pollution-free, dust, easy to clean, resistance be not small, structural strength is high, sound absorption effect
The advantages that good, nontoxic, it can be widely applied to the sound absorption of the varying environment in the fields such as building, ship, high-speed rail.
The welding process of disclosure soldering type slit honeycomb sound absorption structure described in detail below.
Welding aluminum honeycomb panel is to weld aluminum honeycomb as core material, and two sides applies Microfracture plate respectively and perforated plate, combination are placed on
In soldering oven, the metal structure material made of disposable Welding in 600 DEG C or so of temperature field.
Heating temperature in welding is higher than solder fusion temperature and is lower than base material melting temperature, i.e., melt solder and base material be not
Molten, the solder melted in the process is filled between two base materials in infiltration under capillary attraction, and is mutually dissolved, is expanded with base material
It dissipates, two base materials is welded as a whole after cooled and solidified.
Wherein, all nodes between aluminium honeycomb core and aluminum deck are that Welding is integral.Honeycomb core internal structure,
Such as hexagonal honeycomb shape internal structure can increase timber intensity by changing internal aluminum honeycomb aluminum foil thickness and side length;It can
Secondary welding, can two dimension or three-dimensionally shaped.
Disclosure soldering type slit honeycomb sound absorption structure has the advantage that node strength height: climbing drum peel strength is general
State is torn greater than 200N.mm/mm, and in honeycomb core;Compression strength is high: the specification of common welding aluminium honeycomb core is 0.2 side
6, compression strength >=5Mpa;Temperature tolerance is strong: welding aluminum honeycomb panel all material is pure aluminum alloy material, and whole process is not
Any nonmetallic materials are added, the moulding process temperature of product is up to 600 DEG C.Thus the temperature tolerance of the material is decided by aluminium alloy material
The temperature tolerance of material;Smokeless nontoxic: welding aluminum honeycomb panel is pure aluminum alloy structural material, and no poisonous and harmful substance generates;Quality
Light: surface density is 8~10Kg/m2, volume density is 0.4~0.5*103Kg/m3;Environmental protection is recyclable: composition welding aluminum honeycomb panel
Honeycomb core and panel are aluminum alloy materials, weld aluminum honeycomb panel production molding during also without poisonous and harmful substance addition or
It generates, product is pure aluminum alloy structure, can 100% recycling.Thus the material is prepared into production from raw material, then arrives
Product recycling, the entire chain that produces is pollution-free, recyclable process;Excellent impact resistance: since welding aluminum honeycomb panel is excellent
Node strength, impact energy can be decomposed rapidly to absorption in being hit, thus impact resistance is significantly larger than similar product.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
So far, attached drawing is had been combined the embodiment of the present disclosure is described in detail.According to above description, art technology
Personnel should have clear understanding to the disclosure.
It should be noted that in attached drawing or specification text, the implementation for not being painted or describing is affiliated technology
Form known to a person of ordinary skill in the art, is not described in detail in field.In addition, the above-mentioned definition to each element and method is simultaneously
It is not limited only to various specific structures, shape or the mode mentioned in embodiment, those of ordinary skill in the art can carry out letter to it
It singly changes or replaces.
The panel, sandwich layer shape be also not necessarily limited to rectangle, can also be other shapes, such as circle, triangle, six sides
Shape etc..
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail bright, it should be understood that the foregoing is merely the specific embodiment of the disclosure, be not limited to the disclosure, it is all
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the protection of the disclosure
Within the scope of.
Claims (7)
1. a kind of soldering type slit honeycomb sound absorption structure characterized by comprising first panel, second panel and be located at described
Sandwich layer between first panel and second panel;Wherein, the first panel is Microfracture plate, and the sandwich layer is honeycomb sandwich layer;Institute
It states between first panel, second panel and the honeycomb sandwich layer as soldering connection.
2. soldering type slit honeycomb sound absorption structure according to claim 1, which is characterized in that have in the first panel
Multiple rectangles of periodic arrangement or the slit of arc.
3. soldering type slit honeycomb sound absorption structure according to claim 1, which is characterized in that the second panel is perforation
Plate.
4. soldering type slit honeycomb sound absorption structure according to claim 3, which is characterized in that have in the second panel
In square, triangle periodic arrangement multiple round holes.
5. soldering type slit honeycomb sound absorption structure according to claim 1, which is characterized in that the first panel, second
The material of panel and sandwich layer is metal.
6. soldering type slit honeycomb sound absorption structure according to claim 1, which is characterized in that the first panel, second
The material of panel and sandwich layer is aluminium.
7. soldering type slit honeycomb sound absorption structure according to claim 1, which is characterized in that the honeycomb sandwich layer is hexagonal
Honeycomb, quadrangle honeycomb or triangle honeycomb sandwich layer.
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CN201811298198.0A CN109272980A (en) | 2018-11-01 | 2018-11-01 | Soldering type slit honeycomb sound absorption structure |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110136684A (en) * | 2019-04-24 | 2019-08-16 | 上海钟音环保设备有限公司 | A kind of sound-proof sound-absorbing plate |
CN112984768A (en) * | 2021-03-17 | 2021-06-18 | 马鞍山安达泰克科技有限公司 | Noise reduction structure |
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CN209312434U (en) * | 2018-11-01 | 2019-08-27 | 中国船舶重工集团公司第七一四研究所 | Soldering type slit honeycomb sound absorption structure |
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2018
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CN202003672U (en) * | 2010-12-13 | 2011-10-05 | 南京常荣噪声控制环保工程有限公司 | Honeycomb sound absorption element |
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CN202463819U (en) * | 2011-12-13 | 2012-10-03 | 隋富生 | Micropunch arc plate sound absorption device used for ceiling and apron board of high speed train |
CN204760018U (en) * | 2015-06-29 | 2015-11-11 | 中国船舶重工集团公司第七一四研究所 | Micropore honeycomb sound absorbing structure |
CN205810375U (en) * | 2016-06-30 | 2016-12-14 | 北京市劳动保护科学研究所 | A kind of microperforated panel acoustic filter |
CN107869408A (en) * | 2016-09-28 | 2018-04-03 | 中国航发商用航空发动机有限责任公司 | Counter with decrease of noise functions pushes away leaf grating |
CN206475511U (en) * | 2017-02-15 | 2017-09-08 | 青岛泰泓轨道装备有限公司 | One kind electromagnetic shielding cellular board |
CN209312434U (en) * | 2018-11-01 | 2019-08-27 | 中国船舶重工集团公司第七一四研究所 | Soldering type slit honeycomb sound absorption structure |
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