CN106504738A - Ultra-high voltage converter station noise sound absorption device - Google Patents
Ultra-high voltage converter station noise sound absorption device Download PDFInfo
- Publication number
- CN106504738A CN106504738A CN201610906664.3A CN201610906664A CN106504738A CN 106504738 A CN106504738 A CN 106504738A CN 201610906664 A CN201610906664 A CN 201610906664A CN 106504738 A CN106504738 A CN 106504738A
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- Prior art keywords
- sound absorption
- ultra
- high voltage
- voltage converter
- converter station
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Classifications
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- 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
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a kind of ultra-high voltage converter station noise sound absorption device, is sequentially connected and is constituted by porous aluminium sheet (1), framework (2), ground floor polyester ammonia foam acousticabsorption plastic (3), foamed aluminium board (4), second layer polyester ammonia foam acousticabsorption plastic (5) and galvanized steel plain sheet (6)；In described framework (2), tiling is equipped with steel wire (22) and PVF thin film (21) and described steel wire (22) is above close to described ground floor polyester ammonia foam acousticabsorption plastic (3) close to described steel wire (22), described PVF thin film (21) below close to described porous aluminium sheet (1), described PVF thin film (21).The structure possesses the acoustically effective of wider frequency range, can be used for the sound absorption that the change of current becomes the various noise sources of class, and low frequency sound absorption characteristic is particularly evident, particular for the all-bottom sound of below 500Hz, it is adaptable to the all-bottom sound sound absorption that the change of current becomes.The structure safety and environmental protection, is easily installed.
Description
Technical field
The present invention relates to a kind of sound absorption device, more particularly to a kind of ultra-high voltage converter station noise sound absorption device.
Background technology
Acoustic screen in ultra-high voltage converter station, the change of current become Felt, mostly relatively simple, how using porous or long slit material
Charge level plate, the inside are simply filled with sound absorption cotton or glass fibre, constitute simple resonant cavity, sound absorption system using the natural frequency of material
Number is not high, and frequency range is narrow, especially the sound absorption DeGrain to low-frequency noise, and packing material is not environmentally, easily makes
Into secondary pollution, in addition to reach certain sound absorption effect, increase cavity thickness is not stinted, not only increase cost, and
Make troubles to in-site installation.
In addition ultra-high voltage converter station noise source category, large number of, including converter power transformer, capacitor etc., above equipment
Low Frequency Noise Generator is, wherein converter power transformer accounts for acoustic energy in noise spectrum based on the low-frequency noise of 100Hz, 400Hz
More than 98%.Reactor and capacitor bank are due to large number of, it is impossible to install sound absorption device near the equipment, but can be
Sound absorption device is installed at the station circle enclosure wall of equipment.
Content of the invention
The technical problem to be solved is to provide the low-frequency noise resonance sound-absorbing below a kind of exchange rheology 500Hz
Effect preferably, and process is simple, be readily produced and manufacture, the ultra-high voltage converter station noise sound absorption device of environmental protection.
In order to solve above-mentioned technical problem, the ultra-high voltage converter station noise sound absorption device that the present invention is provided, by porous aluminum
Plate, framework, ground floor polyester ammonia foam acousticabsorption plastic, foamed aluminium board, second layer polyester ammonia foam acousticabsorption plastic and galvanized steel plain sheet
It is sequentially connected composition；In described framework, tiling is equipped with steel wire and PVF thin film and described steel wire is close to described porous
It is close to described ground floor polyester before aluminium sheet, described PVF thin film close to behind described steel wire, described PVF thin film
Ammonia foam acousticabsorption plastic.
Described porous aluminium sheet, framework, ground floor polyester ammonia foam acousticabsorption plastic, foamed aluminium board, second layer polyester ammonia bubble
The overall dimensions of foam acousticabsorption plastic and galvanized steel plain sheet are 1m × 1m, and corner is provided with 4, the hole that aperture is 6mm, with rubber sleeve
Bolt connection, head and the tail junction add rubber sheet gasket.
Described porous aluminium plate thickness is 2mm, and punching rate is 2.5%～18.0%, and aperture is 1～3mm, pitch of holes 4～
6mm.
Described framework border width is 10mm, and seal ring thickness is 12mm.
Steel wire diameter used by described steel wire is 2mm, and mesh size is 1cm × 1cm.
The thickness of described PVF thin film is 0.06mm.
The thickness of described ground floor polyester ammonia foam acousticabsorption plastic is 80mm, and described second layer polyester ammonia foam absorbs sound
The thickness of plastics is 20mm.
The thickness of described foamed aluminium board is 5mm.
The thickness of described galvanized steel plain sheet is 2mm.
Between described porous aluminium sheet and described galvanized steel plain sheet, gross thickness is 117mm.
Using the ultra-high voltage converter station noise sound absorption device of above-mentioned technical proposal, including porous aluminium sheet, PVF thin film and bubble
The combinative structure of foam aluminium sheet, polyester ammonia foam acousticabsorption plastic etc., adopts the bolt connection with rubber sleeve, adds rubber again in junction
Pad.In the framework with wire netting, porous aluminium sheet and galvanized steel plain sheet do front and back panels to wherein PVF foil posters respectively, mainly
It play fixed supporting role, also has certain sound absorption function.PVF thin film is du pont company's patented product, with waterproof, resistance
Combustion, aging resistance, antistatic, not dust stratification, long service life the features such as, be mainly used in absorbing sound, PVF Film laminated sound absorption structures exist
At 400Hz, the acoustic absorptivity of vertical incidence is up to 0.97.
Polyester ammonia foam acousticabsorption plastic is mainly used in absorbing sound, and its thickness is 80mm, and density is 45kg/m3, with higher
Acoustic absorptivity, acoustic absorptivity is up to 0.95 at the 500Hz.
Foamed aluminium board is close to polyester ammonia foam acousticabsorption plastic, and foamed aluminium board itself has sound absorption and sound insulation function, thin with PVF
Film coordinates, and can guarantee that acoustic absorptivity.
The present invention has the acoustically effective of wider frequency range, to the low frequency absorption coefficient of 400Hz up to more than 0.90, every
Volume is conservative to be estimated as 20dB.Porous sound lining resonant frequency with porous aluminium sheet capping is calculated as follows：
P：The percentage ratio of plate open area；L：Including the depth of the support cavity including porous material layer, m；t：Panel is thick
Degree, m；d：Opening diameter, m；q：The distance between Liang Gekong centers, m.If porous material is full of whole cavity, i.e. porous material
Thickness is also L, and application 0.85C replaces C.
Doubling plate oise insulation factor is calculated：
R=16lg (M1+M2)+8+ΔR (M1+M2)≥200kg/m2
R=13.5lg (M1+M2)+14+ΔR (M1+M2) ＜ 200kg/m2
M1,M2：For the surface density of dividing plate, units/kg/m2,ΔR：Air layer further acoustical insulation amount.
Suction of the present invention using combinative structurees such as porous aluminium sheet, PVF thin film and foamed aluminium board, polyester ammonia foam acousticabsorption plastics
Sound insulation design, can use the sound absorption of ultra-high voltage converter station converter power transformer, and the low-frequency noise resonance for exchanging below rheology 500Hz is inhaled
Sound effective value preferably, can be used for the noise sound absorption of Converter Station circle, and the device technique is simple, be readily produced and manufacture,
Using material environment friendly, do not result in secondary pollution.And material gross thickness is easy to in-site installation less than 120mm.
The present invention makes current conversion station sound absorption device using combined type material, not use only material resonance sound absorption former
Reason, additionally uses thin film sound absorption technique, substantially increases the acoustic absorptivity of material, selected the sound absorption material for low-frequency noise
Material, such as polyester ammonia foam acousticabsorption plastic, foamed aluminium board (metal material), adopt wire netting between porous panel and sound absorption thin film
Lattice separate, it is to avoid reduce the acoustic absorptivity of thin film and sound-absorbing material after compound.
In sum, the present invention is that a kind of low-frequency noise resonance sound-absorbing effect for exchanging below rheology 500Hz is preferable, and
Process is simple, be readily produced and manufacture, the ultra-high voltage converter station noise sound absorption device of environmental protection.
Description of the drawings
Fig. 1 the structural representation of present invention.
Fig. 2 is line A-A cut-away view along Fig. 1.
Fig. 3 is the structural representation of the framework of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings present disclosure is described in further detail.
Referring to Fig. 1, Fig. 2 and Fig. 3, a kind of ultra-high voltage converter station noise sound absorption device, by porous aluminium sheet 1, framework 2,
One strata ester ammonia foam plasticss 3, foamed aluminium board 4, second layer polyester ammonia foam plasticss 5 and galvanized steel plain sheet 6 are sequentially connected composition；Frame
In frame 2 tiling equipped with steel wire 22 and PVF thin film 21 and steel wire 22 close to porous aluminium sheet 1, PVF thin film 21 above close to steel wire
Net 22, PVF thin film 21 are close to ground floor polyester ammonia foam plasticss 3 below.
Specifically, porous aluminium sheet 1, framework 2, ground floor polyester ammonia foam plasticss 3, foamed aluminium board 4, second layer polyester ammonia bubble
The overall dimensions of foam plastics 5 and galvanized steel plain sheet 6 are 1m × 1m, and corner is provided with 4, the hole that aperture is 6mm, with the spiral shell with rubber sleeve
Tether and connect, head and the tail junction adds rubber sheet gasket.
1 thickness of porous aluminium sheet is 2mm, and punching rate is 3.6%, and aperture is 3mm, pitch of holes 6mm.2 border width of framework is
10mm, seal ring thickness are 12mm.Steel wire diameter used by steel wire 22 is 2mm, and mesh size is 1cm × 1cm.PVF thin film 21
Thickness is 0.06mm.The thickness of ground floor polyester ammonia foam plasticss 3 is 80mm, and the thickness of second layer polyester ammonia foam plasticss 5 is
20mm.The thickness of foamed aluminium board 4 is 5mm.The thickness of galvanized steel plain sheet 6 is 2mm.
Between porous aluminium sheet 1 and described galvanized steel plain sheet 6, gross thickness is 117mm.
Referring to Fig. 1, Fig. 2 and Fig. 3, in certain noise and vibration laboratory reverberation room, by following dimensional requirement assembled inhale every
Acoustic device：
First, sound absorption test
The full-size of sound absorption test specimen test zone is as shown below, and length is 3950mm, and width is 2950mm.Can be by
One test specimen is constituted, also can be assembled by multiple test specimens.In the case where following condition is met, can be spelled according to practical situation
Dress combination.
(1) the test specimen gross area should be 10m2～12m2；
(2) rectangle that test specimen should be assembled into width with length ratio is 0.7～1.0.
2nd, sound insulation measurement
The dimensional requirement of sound insulation test specimen test zone is as shown below, and length is 4000mm, is highly 2500mm, can be with root
According to practical situation assembling combination.
3rd, experimental result
Acoustic absorptivity test result and oise insulation factor test result are shown in Tables 1 and 2 respectively：
1 acoustic absorptivity test result of table
2 oise insulation factor test result of table
Can be seen that from 1 test data of table, in 500Hz frequencies below point, there is higher acoustic absorptivity, absorb sound at 400Hz
Coefficient is maximum.
Oise insulation factor in 500Hz Frequency points be can be seen that up to 40dB from 2 test data of table.
Claims (10)
1. a kind of ultra-high voltage converter station noise sound absorption device, is characterized in that：By porous aluminium sheet (1), framework (2), the first strata
Ester ammonia foam acousticabsorption plastic (3), foamed aluminium board (4), second layer polyester ammonia foam acousticabsorption plastic (5) and galvanized steel plain sheet (6) are successively
Connection composition；In described framework (2) tiling equipped with steel wire (22) and PVF thin film (21) and described steel wire (22) close to
Described porous aluminium sheet (1), described PVF thin film (21) are above close to described steel wire (22), described PVF thin film (21)
It is close to described ground floor polyester ammonia foam acousticabsorption plastic (3) below.
2. ultra-high voltage converter station noise sound absorption device according to claim 1, is characterized in that：Described porous aluminium sheet
(1), framework (2), ground floor polyester ammonia foam acousticabsorption plastic (3), foamed aluminium board (4), second layer polyester ammonia foam acousticabsorption plastic
(5) and galvanized steel plain sheet (6) overall dimensions be 1m × 1m, corner be provided with aperture be 6mm 4, hole, with the bolt with rubber sleeve
Connection, head and the tail junction adds rubber sheet gasket.
3. ultra-high voltage converter station noise sound absorption device according to claim 1 and 2, is characterized in that：Described porous aluminum
Plate (1) thickness is 2mm, and punching rate is 2.5%～18.0%, and aperture is 1～3mm, 4～6mm of pitch of holes.
4. ultra-high voltage converter station noise sound absorption device according to claim 1 and 2, is characterized in that：Described framework (2)
Border width is 10mm, and seal ring thickness is 12mm.
5. ultra-high voltage converter station noise sound absorption device according to claim 1 and 2, is characterized in that：Described steel wire
(22) steel wire diameter used by is 2mm, and mesh size is 1cm × 1cm.
6. ultra-high voltage converter station noise sound absorption device according to claim 1 and 2, is characterized in that：Described PVF thin film
(21) thickness is 0.06mm.
7. ultra-high voltage converter station noise sound absorption device according to claim 1 and 2, is characterized in that：Described ground floor
The thickness of polyester ammonia foam acousticabsorption plastic (3) is 80mm, and the thickness of described second layer polyester ammonia foam acousticabsorption plastic (5) is
20mm.
8. ultra-high voltage converter station noise sound absorption device according to claim 1 and 2, is characterized in that：Described foamed aluminium
The thickness of plate (4) is 5mm.
9. ultra-high voltage converter station noise sound absorption device according to claim 1 and 2, is characterized in that：Described galvanized steel
The thickness of plate (6) is 2mm.
10. ultra-high voltage converter station noise sound absorption device according to claim 1 and 2, is characterized in that：Described porous aluminum
Between plate (1) and described galvanized steel plain sheet (6), gross thickness is 117mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610906664.3A CN106504738A (en) | 2016-10-18 | 2016-10-18 | Ultra-high voltage converter station noise sound absorption device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610906664.3A CN106504738A (en) | 2016-10-18 | 2016-10-18 | Ultra-high voltage converter station noise sound absorption device |
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| Publication Number | Publication Date |
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| CN106504738A true CN106504738A (en) | 2017-03-15 |
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ID=58294270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610906664.3A Pending CN106504738A (en) | 2016-10-18 | 2016-10-18 | Ultra-high voltage converter station noise sound absorption device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109605842A (en) * | 2018-10-25 | 2019-04-12 | 中国船舶重工集团公司第七〇九研究所 | A kind of broadband multilayer compound sound-absorption structural peculiar to vessel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109605842A (en) * | 2018-10-25 | 2019-04-12 | 中国船舶重工集团公司第七〇九研究所 | A kind of broadband multilayer compound sound-absorption structural peculiar to vessel |
| CN109605842B (en) * | 2018-10-25 | 2022-10-21 | 中国船舶重工集团公司第七一九研究所 | Marine broadband multilayer composite sound absorption structure |
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Application publication date: 20170315 |