CN105185369A - Sound attenuating system for low-noise integrated equipment cabinet used for communication - Google Patents
Sound attenuating system for low-noise integrated equipment cabinet used for communication Download PDFInfo
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- CN105185369A CN105185369A CN201510510860.4A CN201510510860A CN105185369A CN 105185369 A CN105185369 A CN 105185369A CN 201510510860 A CN201510510860 A CN 201510510860A CN 105185369 A CN105185369 A CN 105185369A
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- panel
- sound
- muffling unit
- attenuating system
- low noise
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Abstract
The invention provides a sound attenuating system for a low-noise integrated equipment cabinet used for communication, and relates to a sound attenuating system. Objectives of the invention are to solve problems that an existing equipment cabinet used for communication does not have a sound attenuating device, or a sound attenuating device is not rational and cannot really reduce noise. The system comprises an upper end sound attenuating unit and a lower end sound attenuating unit. The upper end sound attenuating unit comprises a first housing. The first housing is internally provided with a first diversion trench and a first sound eliminator which are communicated. The first sound eliminator comprises a first panel, a second panel, an acoustic material, and a plurality of hush pipes. The first panel and the second panel establish connection through the plurality of hush pipes. The acoustic material is filled among the first panel, the second panel, and the plurality of hush pipes. The system is simple in structure, and is characterized by light weight, short noise elimination length, small volume for same noise reduction capacity, small space occupation, low cost, simple mold manufacturing, and no rust.
Description
Technical field
The present invention relates to a kind of sound-attenuating system, be specifically related to communication low noise integrated cabinet sound-attenuating system, belong to communication cabinet sound-attenuating system technical field.
Background technology
Existing communication rack is without silencing equipment, without sound insulation and noise reducing process, along with the continuous upgrading of network, the website of communication base station is more and more intensive, more next place of having a rest with the life close to people, as road limit, the top of residential building, these places are higher to noise requirements, and noise is all generally will reach 55dB (A) below, and the noise of the upper existing communication rack of society all will more than 65dB (A), be far from reaching country and industry to the noise requirements of communication cabinet.
Summary of the invention
The object of the invention is to solve existing communication rack without silencing equipment, or silencing equipment is unreasonable, can not realize the problem of the noise elimination denoising of real meaning.
Technical scheme of the present invention is: communication low noise integrated cabinet sound-attenuating system, described sound-attenuating system comprises upper end muffling unit and lower end muffling unit, described upper end muffling unit comprises the first housing, the first diversion trench and first sound suppressor of connection is provided with in first housing, described first sound suppressor comprises the first panel, the second panel, acoustical material and some hush pipes, first panel and the second panel are connected by some hush pipes, and acoustical material is filled in by the first panel, between the second panel and some hush pipes.
Described acoustical material is nonmetal acoustical material, can be flame-retardant foam, glass fiber, rock wool or aluminium silicate wool.
The profile of described first diversion trench is fan-shaped, plays the effect of good dredging flow.
Described lower end muffling unit comprises the second housing, comprises the second diversion trench and second sound suppressor of connection in the second housing, and the profile of described second diversion trench is rectangle, and the first sound suppressor is identical with the structure of the second sound suppressor.
Described hush pipe is provided with some micropunch, and the diameter range of described micropunch is between 2mm to 3mm, and the percentage of perforation scope of micropunch is between 10% to 30%, and interval at this, the acoustical absorption coefficient of the tube wall of perforated pipe is between 0.4-0.2.
The diameter range of described hush pipe is between 50mm to 60mm.
The relative position of described first panel and the second panel is provided with some through holes, described through hole is matrix arrangement, distance range between adjacent two through holes is between 50mm to 100mm, and the two ends difference intercalation of described hush pipe is in the through hole that the first panel is relative with the second panel.
Described rack comprises heat-dissipating storehouse, described heat-dissipating storehouse is communicated with lower end muffling unit with upper end muffling unit respectively, described lower end muffling unit is inlet channel, and upper end muffling unit is outlet passageway, and the length of described upper end muffling unit is greater than the length of lower end muffling unit.
The density range of described acoustical material is between 25kg/m3-60kg/m3, and the acoustical absorption coefficient of acoustical material is now maximum.
The wallboard of described rack is noise elimination wallboard, and the cabinet door of rack is soundproof door, not only has sound insulation effect, and has heat-blocking action.
The present invention compared with prior art has following effect: structure of the present invention is simple, have lightweight, short, the same sound deadening capacity volume of noise elimination length is little, need that space is little, cost is low, Making mold simply, the feature of not corrosion.Sound-attenuating system of the present invention is taken into account as the air-conditioning of Main Noise Sources or heat exchanger, and described sound suppressor adopts impedance combination, and noise is less, and the level of noise after noise reduction, lower than 50 decibels, meets Industry code requirements completely.
Accompanying drawing explanation
Fig. 1, the integrated model schematic diagram of cabinet of the present invention;
Fig. 2, the structural representation of upper end of the present invention muffling unit;
The amplifier section schematic diagram of C part in Fig. 3, Fig. 2;
Fig. 4, the structural representation of lower end of the present invention muffling unit;
The amplifier section schematic diagram of D part in Fig. 5, Fig. 4;
Fig. 6, rack noise source curve map;
Fig. 7, the noise curve figure after sound-attenuating system process.
Embodiment
Accompanying drawings the specific embodiment of the present invention, the communication low noise integrated cabinet sound-attenuating system of present embodiment, described sound-attenuating system comprises upper end muffling unit A and lower end muffling unit B, described upper end muffling unit A comprises the first housing 1, the first cystosepiment 6 is provided with in first housing 1, the first diversion trench 2 and the first sound suppressor be communicated with, cystosepiment is placed in the upper end of diversion trench 2 and the first sound suppressor, described first sound suppressor comprises the first panel 3-1, second panel 3-2, acoustical material 3-3 and some hush pipe 3-4, first panel 3-1 and the second panel 3-2 is connected by some hush pipe 3-4, acoustical material 3-3 is filled in by the first panel 3-1, between second panel 3-2 and some hush pipe 3-4, shown first panel 3-1 is fixedly connected with cystosepiment 6 by rivet with the upper end of the second panel 3-2,
The profile of described first diversion trench 2 is fan-shaped.
Described lower end muffling unit B comprises the second housing 4, the second diversion trench 5 and the second sound suppressor comprise the second cystosepiment 7 in second housing 4, being interconnected, second cystosepiment 7 is arranged on the top of the second sound suppressor, first sound suppressor is identical with the structure of the second sound suppressor, and the profile of described second diversion trench 5 is rectangle.
Shown first cystosepiment 6 and the second cystosepiment 7 play the effect of silencing and damping.
Shown first housing 1 and the second housing 4 have galvanized steel plain sheet to form, and the first panel 3-1 is that Zinc-coated steel-plated punch forms, and the second panel 3-2 is plastic front board.Described plastic front board has two limits, and one is long limit, and one is minor face, fixes respectively with corresponding pressing plate.
Described hush pipe 3-4 is provided with some micropunch, and the diameter range of described micropunch is between 2mm to 3mm, and the percentage of perforation scope of micropunch is between 10% to 30%.
The diameter range of described hush pipe 3-4 is between 50mm to 60mm.
The relative position of described first panel 3-1 and the second panel 3-2 is provided with some through holes, described through hole is matrix arrangement, distance range between adjacent two through holes is between 50mm to 100mm, and the two ends difference intercalation of described hush pipe 3-4 is in the through hole that the first panel 3-1 is relative with the second panel 3-2.
The density range of described acoustical material 3-3 is at 25kg/m
3-60kg/m
3between.
Described rack comprises heat-dissipating storehouse, described heat-dissipating storehouse is communicated with lower end muffling unit B with upper end muffling unit A respectively, described lower end muffling unit B is inlet channel, and upper end muffling unit A is outlet passageway, and the length of described upper end muffling unit A is greater than the length of lower end muffling unit B.Because air-flow enters from lower end muffling unit B, discharge from upper end muffling unit A, and noise is by thinking in cabinet to spread out of outside cabinet, when lower end muffling unit B transmits, air-flow is contrary with the transmission direction of noise, and when noise transmits in the muffling unit A of upper end, air-flow is identical with the transmission direction of noise.Can ensure that silene system has better noise removal function like this.
Described first exhaust box is identical with the width of cabinet with the width of the second exhaust box, for low noise cabinet, and the quantity of the hush pipe when hush pipe quantity of the short transverse of its exhaust box is less than strong noise.Length is relevant with the sound-damping qualities of cabinet, the longer sound-damping qualities of length of exhaust box is larger, traditional formula sound-damping qualities is directly proportional to length, found through experiments sound-damping qualities and silencer length is not proportional relation, be tending towards direct ratio within the scope of certain length, after exceeding this scope, be tending towards little with length relation.
The flow resistance of exhaust box is relevant with the quantity of pipe in exhaust box, and quantity is larger, and flow resistance is less, and physical relationship is as follows:
△P＝0.5ρv
2ξ
△ P: the flow resistance of sound suppressor;
ρ: the gas density flowing through sound suppressor;
V: the flow velocity of sound suppressor internal gas flow;
ξ: the extinction coefficient of sound suppressor;
In described sound suppressor, the flow velocity of air-flow is not relevant with the xsect sum of the gas flow of sound suppressor and each hush pipe of sound suppressor.
Strip-type silencer and folded plate type sound suppressor is generally adopted in prior art, strip-type silencer is in same sound deadening capacity situation, and it is long that noise elimination length reaches at least 2m-4m/, and spatial volume will become very huge, even exceed the volume of main frame cabinet, very inapplicable, folded plate type flow resistance too large equipment be can not accept, in addition chip and folded plate type sound suppressor, when orifice plate is welded on skeleton, cannot be anticorrosion inside orifice plate, this is the common fault of generally acknowledging in the world, is to accomplish thorough corrosion-resistant.
In order to reach good temperature control effect, general outdoor cabinet has all selected high rotating speed, the fan of Wind Volume, the rotating speed of fan all reaches more than 2700rpm, so record the noise of rack at more than 65dB (A) at distance outdoor cabinet 1.5m place, the outer 1.5m of YD/T1537-2006 standard regulation urban community territory rack, distance 1.2m place, ground position noise is less than 55dB (A), so rack must do noise reduction process, otherwise the normal life of neighbouring resident will be affected, cause the complaint of resident.
The noise of air-conditioning or heat exchanger is the noise that produces of fan mainly, and its fan main body is plastics, so there is not mechanical noise, and its noise mainly aerodynamic noise, the mechanism that its noise produces:
When the draught fan impeller of multiple blade pivots, the blade of rotation constantly applies acting force to air-flow, and the average portion of acting force corresponds to the thrust maintaining air motion, and its alternating compenent then corresponds to the excitation force producing pneumatic noise.
The outstanding advantage that shell and tube sound suppressor of the present invention has relative to the sound suppressor of prior art is as shown in table 1 to table 5.
Table 1: the spectral characteristic of different sound suppressor compares;
Table 2: different sound suppressor sound deadening capacity compares;
The comparison of the flow resistance characteristic of the different sound suppressor of table 3: (come to flow mean flow rate with sound suppressor to make comparisons, circulation, also can more out legitimate reading than different);
The manufacturability of the different sound suppressor of table 4 compares;
The anti-corrosive properties of the different sound suppressor of table 5 compare;
The cost compare of different sound suppressor:
Under the condition of identical flow resistance and sound deadening capacity, this tubulation sound suppressor price is only equivalent to 70% of other kind sound suppressor prices.As added not corrosion under rugged surroundings, compare with other sound suppressors of stainless steel, price is only equivalent to 40% of other sound suppressor.Price advantage is remarkable.
Claims (8)
1. communication low noise integrated cabinet sound-attenuating system, it is characterized in that: described sound-attenuating system comprises upper end muffling unit and lower end muffling unit, described upper end muffling unit comprises the first housing, the first diversion trench and first sound suppressor of connection is provided with in first housing, described first sound suppressor comprises the first panel, the second panel, acoustical material and some hush pipes, first panel and the second panel are connected by some hush pipes, and acoustical material is filled in by the first panel, between the second panel and some hush pipes.
2. communication low noise integrated cabinet sound-attenuating system according to claim 1, is characterized in that: the profile of described first diversion trench is fan-shaped.
3. communication low noise integrated cabinet sound-attenuating system according to claim 1, it is characterized in that: described lower end muffling unit comprises the second housing, the second diversion trench and second sound suppressor of connection is comprised in second housing, the profile of described second diversion trench is rectangle, and the first sound suppressor is identical with the structure of the second sound suppressor.
4. communication low noise integrated cabinet sound-attenuating system according to claim 1 to any claim of claim 3, it is characterized in that: described hush pipe is provided with some micropunch, the diameter range of described micropunch is between 2mm to 3mm, and the percentage of perforation scope of micropunch is between 10% to 30%.
5. communication low noise integrated cabinet sound-attenuating system according to claim 1 to any claim of claim 3, is characterized in that: the diameter range of described hush pipe is between 50mm to 60mm.
6. communication low noise integrated cabinet sound-attenuating system according to claim 1 to any claim of claim 3, it is characterized in that: the relative position of described first panel and the second panel is provided with some through holes, described through hole is matrix arrangement, distance range between adjacent two through holes is between 50mm to 100mm, and the two ends difference intercalation of described hush pipe is in the through hole that the first panel is relative with the second panel.
7. communication low noise integrated cabinet sound-attenuating system according to claim 1 to any claim of claim 3, is characterized in that: the density range of described acoustical material is at 25kg/m
3-60kg/m
3between.
8. communication low noise integrated cabinet sound-attenuating system according to claim 1, it is characterized in that: described rack comprises heat-dissipating storehouse, described heat-dissipating storehouse is communicated with lower end muffling unit with upper end muffling unit respectively, described lower end muffling unit is inlet channel, upper end muffling unit is outlet passageway, and the length of described upper end muffling unit is greater than the length of lower end muffling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510510860.4A CN105185369A (en) | 2015-08-19 | 2015-08-19 | Sound attenuating system for low-noise integrated equipment cabinet used for communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510510860.4A CN105185369A (en) | 2015-08-19 | 2015-08-19 | Sound attenuating system for low-noise integrated equipment cabinet used for communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105185369A true CN105185369A (en) | 2015-12-23 |
Family
ID=54907397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510510860.4A Pending CN105185369A (en) | 2015-08-19 | 2015-08-19 | Sound attenuating system for low-noise integrated equipment cabinet used for communication |
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| CN (1) | CN105185369A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105555103A (en) * | 2016-01-08 | 2016-05-04 | 烽火通信科技股份有限公司 | Single board and simulative single board based on balance between improvement of thermal dissipation capability and reduction of noise emission |
| CN105682386A (en) * | 2015-12-28 | 2016-06-15 | 中国联合网络通信集团有限公司 | Noise isolation device and equipment cabinet |
| CN107041107A (en) * | 2017-04-28 | 2017-08-11 | 华为技术有限公司 | A kind of exhaust apparatus |
| CN108287600A (en) * | 2017-01-09 | 2018-07-17 | 广达电脑股份有限公司 | Streamlined anti-device and the arithmetic unit comprising it of making an uproar |
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| CN2907192Y (en) * | 2006-04-29 | 2007-05-30 | 廉纪奎 | Air draft and heat exchange air chute on the top of cabinet |
| CN101888763A (en) * | 2009-12-08 | 2010-11-17 | 苏州新大诚科技发展股份有限公司 | Noise reducing structure of outdoor integrated cabinet |
| CN102548363A (en) * | 2011-12-31 | 2012-07-04 | 华为技术有限公司 | Control method for machine cabinet and communication device |
| CN202373289U (en) * | 2011-12-27 | 2012-08-08 | 谢学林 | Silencer |
| CN103021399A (en) * | 2012-11-21 | 2013-04-03 | 华为技术有限公司 | Sound-proof device and electronic equipment |
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| CN204204405U (en) * | 2014-10-29 | 2015-03-11 | 中国移动通信集团设计院有限公司 | A kind of mute structure |
| CN104704247A (en) * | 2013-04-28 | 2015-06-10 | 华为技术有限公司 | Ventilation noise reduction device and cabinet with same |
| CN104775726A (en) * | 2015-03-09 | 2015-07-15 | 江苏建筑职业技术学院 | Shell and tube type soundproof window |
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2015
- 2015-08-19 CN CN201510510860.4A patent/CN105185369A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2519981Y (en) * | 2001-11-29 | 2002-11-06 | 谢学林 | Silencer equipment |
| CN2907192Y (en) * | 2006-04-29 | 2007-05-30 | 廉纪奎 | Air draft and heat exchange air chute on the top of cabinet |
| CN101888763A (en) * | 2009-12-08 | 2010-11-17 | 苏州新大诚科技发展股份有限公司 | Noise reducing structure of outdoor integrated cabinet |
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| CN203040090U (en) * | 2012-12-20 | 2013-07-03 | 南京华脉科技有限公司 | Communicational outdoor equipment cabinet fan noise-reduction device |
| CN103209555A (en) * | 2013-04-25 | 2013-07-17 | 深圳市华晨通信技术有限公司 | Communication cabinet |
| CN104704247A (en) * | 2013-04-28 | 2015-06-10 | 华为技术有限公司 | Ventilation noise reduction device and cabinet with same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105682386A (en) * | 2015-12-28 | 2016-06-15 | 中国联合网络通信集团有限公司 | Noise isolation device and equipment cabinet |
| CN105555103A (en) * | 2016-01-08 | 2016-05-04 | 烽火通信科技股份有限公司 | Single board and simulative single board based on balance between improvement of thermal dissipation capability and reduction of noise emission |
| CN105555103B (en) * | 2016-01-08 | 2018-05-29 | 烽火通信科技股份有限公司 | A kind of veneer and analog veneer coupled based on heat dissipation with noise reduction balance |
| CN108287600A (en) * | 2017-01-09 | 2018-07-17 | 广达电脑股份有限公司 | Streamlined anti-device and the arithmetic unit comprising it of making an uproar |
| CN108287600B (en) * | 2017-01-09 | 2020-06-09 | 广达电脑股份有限公司 | Streamline anti-noise device and arithmetic device comprising same |
| CN107041107A (en) * | 2017-04-28 | 2017-08-11 | 华为技术有限公司 | A kind of exhaust apparatus |
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Application publication date: 20151223 |
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