CN103032379B - Low-noise centrifugal ventilator casing - Google Patents
Low-noise centrifugal ventilator casing Download PDFInfo
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- CN103032379B CN103032379B CN201310002227.5A CN201310002227A CN103032379B CN 103032379 B CN103032379 B CN 103032379B CN 201310002227 A CN201310002227 A CN 201310002227A CN 103032379 B CN103032379 B CN 103032379B
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- noise
- metal plate
- foam metal
- porous foam
- internal layer
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Abstract
The invention discloses a low-noise centrifugal ventilator casing belonging to the technical field of noise reduction for ventilators. The ventilator casing is formed by sequentially compositing a carbon structural steel inner layer, an inner-layer sound absorption plaster material, a porous foam metal plate, an outer-layer sound absorption plaster material and a carbon structural steel outer layer. The invention provides the low-noise casing which is simple in structure, light in weigh and good in noise reduction effect, and has certain stiffness. The amount of used metal materials is reduced, the cost is lowered, and the noise is reduced to about 10dB.
Description
Technical field
The invention belongs to ventilator noise reduction technology field, particularly a kind of low-noise centrifugal ventilation machine casing.The centrifugal fan casing adopting multilayer acoustic damping materials to be combined into specifically.
Background technique
In ventilator running, the revolution of blade, eddy current, sinuous flow and mechanical vibration all can produce noise.The noise that large centrifugal ventilator produces in running is very large, wherein power station large centrifugal air-blower noise used is up to about 100dB, so high noise not only has a strong impact on the physical and mental health of operations staff, long-term work may cause becoming deaf at such environment, and the dispute caused the work of surrounding resident and the impact of life because of fan noise is also increasing.Current blower fan noise-reduction method focuses mostly in the transformation of blower fan structure aspect, such as imports and exports at blower fan and installs guide plate etc., and install noise elimination sound proof box etc. additional.But many noise-reduction method field conduct more complicated, even relate to the transformation of blower fan important feature, cost is higher, extensive use in the blower fan noise reduction of reality, and its difficulty is very large; Therefore, effectively reduce centrifugal fan noise and become one of major issue improving operations staff's working environment and surrounding resident living environment.
Summary of the invention
The object of this invention is to provide a kind of low-noise centrifugal ventilation machine casing, it is characterized in that, the formation of described low-noise centrifugal ventilation machine casing: be complex as successively to skin from fan casing internal layer: wipe one's face material 2, porous foam metal plate 3, outer sound absorption of structural carbon steel internal layer 1, internal layer sound absorption is wiped one's face material 4 and structural carbon steel skin 5; Its porous foam metal plate has and absorbs or offset the effect of acoustic wave segment, and sound absorption material of wiping one's face has sound insulation function.
Utilize rivet to be fixedly connected between described porous foam metal plate and structural carbon steel internal layer, between each block of porous foam metal plate, straight tenon 6 can be adopted to be connected with straight trough 7.
The invention has the beneficial effects as follows and select different porosities porous metal material and sound absorption to wipe one's face material according to actual conditions, thus provide that structure is simple, quality gently and there is the good low noise casing of the noise reduction of certain rigidity.Decrease the use of metallic material, reduce cost, noise reduction is about 10 dB.
Accompanying drawing explanation
Fig. 1 is low-noise centrifugal ventilation machine casing overall structure schematic diagram.
Fig. 2 is low-noise centrifugal ventilation machine casing partial structurtes schematic diagram.
Embodiment
The present invention proposes a kind of low-noise centrifugal ventilation machine casing.Be explained below in conjunction with accompanying drawing.
In the low-noise centrifugal ventilation machine casing structure schematic diagram shown in Fig. 1, Fig. 2, low-noise centrifugal ventilation machine casing by structural carbon steel internal layer 1, internal layer absorb sound wipe one's face material 2, porous foam metal plate 3, outer sound absorption wipe one's face material 4 and structural carbon steel skin 5 successively compound form, in order to reduce the mechanical vibration noise between ventilator structural carbon steel internal layer 1 and porous foam metal plate 3, between structural carbon steel and porous foam metal plate, arranging the thick internal layer of 10mm to absorb sound material 2 of wiping one's face; Equally, between ventilator structural carbon steel outer 5 and porous foam metal plate 3, also arrange that skin that 10mm is thick absorbs sound material 4 of wiping one's face.At fan casing edge weld bolt, and extend to casing skin, fixing for different parts, utilizes rivet to be fixedly connected between porous foam metal plate 3 and structural carbon steel internal layer 1, straight tenon 6 can be adopted to be connected (as shown in Figure 2) with straight trough 7 between each block of porous foam metal plate.
Principle of noise reduction of the present invention is: the noise in ventilator running, passing through in the outside transmittance process of porous metals, the little hole wall of sound wave and porous metals produces and rubs and reflect, acoustic wave segment is absorbed or is offset, sound wave can be converted into heat energy from viscous resistance face, thus reduces the noise outwards transmitted; Acting as of coating material prevents coming off and effectively preventing aperture clogs of porous foam metal plate, serves certain sound insulation effect simultaneously, ensures noise reduction.
Embodiment
Numerical simulation is used to carry out noise calculation to measuring point in certain centrifugal fan, former blower fan plant noise is about 83 dB, after using low noise casing, the thick structural carbon steel internal layer of employing 10mm of ventilator casing, wipe one's face material 10mm, porous foam metal plate 30mm, outer sound absorption of internal layer sound absorption is wiped one's face the outer compound composition of material 10mm and structural carbon steel 10mm, fan noise is reduced to 72 dB, noise reduction highly significant, improves the working environment of operations staff.
Claims (1)
1. a low-noise centrifugal ventilation machine casing, the formation of described low-noise centrifugal ventilation machine casing: from fan casing internal layer to skin by structural carbon steel internal layer (1), internal layer absorb sound wipe one's face material (2), porous foam metal plate (3), outer absorb sound wipe one's face material (4) and structural carbon steel skin (5) successively compound form; It is characterized in that, in order to reduce the mechanical vibration noise between ventilator structural carbon steel internal layer (1) and porous foam metal plate (3), between structural carbon steel and porous foam metal plate, arranging the thick internal layer of 10mm absorb sound to wipe one's face and expect (2); Equally, between ventilator structural carbon steel skin (5) and porous foam metal plate (3), also arrange that 10mm is thick skin absorbs sound to wipe one's face to expect (4); Its porous foam metal plate has and absorbs or offset the effect of acoustic wave segment, and sound absorption material of wiping one's face has sound insulation function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310002227.5A CN103032379B (en) | 2013-01-05 | 2013-01-05 | Low-noise centrifugal ventilator casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310002227.5A CN103032379B (en) | 2013-01-05 | 2013-01-05 | Low-noise centrifugal ventilator casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103032379A CN103032379A (en) | 2013-04-10 |
| CN103032379B true CN103032379B (en) | 2015-05-13 |
Family
ID=48019637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310002227.5A Expired - Fee Related CN103032379B (en) | 2013-01-05 | 2013-01-05 | Low-noise centrifugal ventilator casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103032379B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103285979A (en) * | 2013-06-04 | 2013-09-11 | 华北电力大学（保定） | Low-noise sound insulation sleeve for double-ended ball mill |
| CN104675752B (en) * | 2015-03-16 | 2017-04-12 | 中国机械工业集团有限公司 | Centrifugal fan volute employing granular damping vibration attenuation |
| CN106151111A (en) * | 2016-08-08 | 2016-11-23 | 常州大学 | A kind of train low noise cooling blower |
| CN111255751B (en) * | 2020-02-26 | 2021-08-13 | 浙江誉达汽车配件有限公司 | Automobile air conditioner condensation fan and processing equipment thereof |
| DE102022107468A1 (en) * | 2022-03-30 | 2023-10-05 | Vaillant Gmbh | Fan for a heater, heater and use of metal foam |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1193682A1 (en) * | 2000-09-28 | 2002-04-03 | The Boeing Company | Acoustic sandwich panel with no septum and apparatus and method for suppressing noise in a turbojet nozzle |
| CN101968063A (en) * | 2010-10-28 | 2011-02-09 | 郭贵明 | Low-noise blower |
| CN201891666U (en) * | 2010-07-29 | 2011-07-06 | 上海宝钢工业检测公司 | Low-noise shell for high-pressure centrifugal fan |
| CN202165317U (en) * | 2011-07-19 | 2012-03-14 | 烟台海德专用汽车有限公司 | Blower casing capable of realizing wear-resistant lining board replacement |
| CN203051227U (en) * | 2013-01-05 | 2013-07-10 | 华北电力大学（保定） | Low-noise centrifugal ventilating fan enclosure |
-
2013
- 2013-01-05 CN CN201310002227.5A patent/CN103032379B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1193682A1 (en) * | 2000-09-28 | 2002-04-03 | The Boeing Company | Acoustic sandwich panel with no septum and apparatus and method for suppressing noise in a turbojet nozzle |
| CN201891666U (en) * | 2010-07-29 | 2011-07-06 | 上海宝钢工业检测公司 | Low-noise shell for high-pressure centrifugal fan |
| CN101968063A (en) * | 2010-10-28 | 2011-02-09 | 郭贵明 | Low-noise blower |
| CN202165317U (en) * | 2011-07-19 | 2012-03-14 | 烟台海德专用汽车有限公司 | Blower casing capable of realizing wear-resistant lining board replacement |
| CN203051227U (en) * | 2013-01-05 | 2013-07-10 | 华北电力大学（保定） | Low-noise centrifugal ventilating fan enclosure |
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| CN103032379A (en) | 2013-04-10 |
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Granted publication date: 20150513 Termination date: 20180105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |