CN103032379A - Low-noise centrifugal ventilator casing - Google Patents
Low-noise centrifugal ventilator casing Download PDFInfo
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- CN103032379A CN103032379A CN2013100022275A CN201310002227A CN103032379A CN 103032379 A CN103032379 A CN 103032379A CN 2013100022275 A CN2013100022275 A CN 2013100022275A CN 201310002227 A CN201310002227 A CN 201310002227A CN 103032379 A CN103032379 A CN 103032379A
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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 that adopts the multilayer acoustic damping materials to be combined into specifically.
Background technique
In the ventilator running, the revolution of blade, eddy current, sinuous flow and mechanical vibration all can produce noise.The noise that the large centrifugal ventilator produces in running is very large, wherein the used large centrifugal air-blower noise in power station is up to about 100dB, so high noise not only has a strong impact on operations staff's physical and mental health, long-term work may cause becoming deaf at such environment, and because of fan noise also increasing on the dispute that the impact of the work of surrounding resident and life causes.The blower fan noise-reduction method focuses mostly in the transformation of blower fan structure aspect at present, such as importing and exporting at blower fan guide plate etc. is installed, and is installed additional noise elimination sound proof box etc.But many noise-reduction method field conduct more complicated, even relate to the transformation of blower fan important structure, cost is higher, extensive use aspect the blower fan noise reduction of reality, and its difficulty is very large; Therefore, effectively reduce the centrifugal fan noise and become one of major issue of improving operations staff's working environment and surrounding resident living environment.
Summary of the invention
The purpose 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 the fan casing internal layer: the sound absorption of structural carbon steel internal layer 1, internal layer 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; Its porous foam metal plate has the effect that absorbs or offset acoustic wave segment, and sound absorption is wiped one's face and expected to have sound insulation function.
Utilize rivet to be fixedly connected between described porous foam metal plate and the structural carbon steel internal layer, can adopt straight tenon 6 to be connected connection with straight trough between each piece porous foam metal plate.
The invention has the beneficial effects as follows according to actual conditions and select different porosities porous metal material and the sound absorption material of wiping one's face, thereby provide simple in structure, quality gently and the good low noise casing of noise reduction with certain rigidity.Reduced the use of metallic material, reduced cost, noise reduction is about 10 dB.
Description of drawings
Fig. 1 is low-noise centrifugal ventilation machine casing overall structure schematic representation.
Fig. 2 is low-noise centrifugal ventilation machine casing partial structurtes schematic representation.
Embodiment
The present invention proposes a kind of low-noise centrifugal ventilation machine casing.Be explained below in conjunction with accompanying drawing.
In Fig. 1, low-noise centrifugal ventilation machine casing structure schematic representation shown in Figure 2, the low-noise centrifugal ventilation machine casing is by structural carbon steel internal layer 1, internal layer sound absorption the wipe one's face material 4 and structural carbon steel skin 5 is compound successively consists of of material 2, porous foam metal plate 3, outer sound absorption of wiping one's face, in order to reduce the mechanical vibration noise between ventilator structural carbon steel internal layer 1 and the porous foam metal plate 3, between structural carbon steel and porous foam metal plate, arranged the thick internal layer of the 10mm sound absorption material 2 of wiping one's face; Equally, arranging also between ventilator structural carbon steel outer 5 and porous foam metal plate 3 that the thick skin sound absorption of 10mm is wiped one's face expects 4.At fan casing edge weld bolt, and extend to the casing skin, be used for the fixing of different parts, utilize rivet to be fixedly connected between porous foam metal plate 3 and the structural carbon steel internal layer 1, can adopt straight tenon 6 to be connected connection (as shown in Figure 2) with straight trough between each piece porous foam metal plate.
Principle of noise reduction of the present invention is: the noise in the ventilator running, in passing through the outside transmittance process of porous metals, the aperture wall of sound wave and porous metals produces friction and reflection, acoustic wave segment is absorbed or offsets, sound wave energy is converted into heat energy from the viscous resistance face, thereby has reduced the noise of outside transmission; The acting as of coating material prevents coming off of porous foam metal plate and effectively prevents aperture clogs, played simultaneously certain sound insulation effect, guarantees the reducing noise effect.
Embodiment
Use numerical simulation that measuring point in certain centrifugal fan is carried out noise calculation, former blower fan plant noise is about 83 dB, after using the low noise casing, the thick structural carbon steel internal layer of the employing 10mm of ventilator casing, the internal layer sound absorption is wiped one's face and is expected 10mm, porous foam metal plate 30mm, outer material 10mm and the outer compound composition of structural carbon steel 10mm of wiping one's face that absorb sound, fan noise is reduced to 72 dB, and the noise reduction highly significant has improved operations staff's working environment.
Claims (2)
1. low-noise centrifugal ventilation machine casing, it is characterized in that the formation of described low-noise centrifugal ventilation machine casing: from the fan casing internal layer to skin by structural carbon steel internal layer (1), internal layer sound absorption material (2), porous foam metal plate (3), the outer sound absorption successively compound formation of material (4) and structural carbon steel skin (5) of wiping one's face of wiping one's face; Its porous foam metal plate has the effect that absorbs or offset acoustic wave segment, and sound absorption is wiped one's face and expected to have sound insulation function.
2. described a kind of low-noise centrifugal ventilation machine casing according to claim 1, it is characterized in that, utilize rivet to fix between described porous foam metal plate and the structural carbon steel internal layer, adopt straight tenon (6) to be connected 7 with straight trough between each piece porous foam metal plate) connect.
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 true CN103032379A (en) | 2013-04-10 |
| CN103032379B CN103032379B (en) | 2015-05-13 |
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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 |
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| CN (1) | CN103032379B (en) |
Cited By (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 |
| CN104675752A (en) * | 2015-03-16 | 2015-06-03 | 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 |
| CN111255751A (en) * | 2020-02-26 | 2020-06-09 | 浙江誉达汽车配件有限公司 | Automobile air conditioner condensation fan and processing equipment thereof |
| EP4253865A1 (en) * | 2022-03-30 | 2023-10-04 | Vaillant GmbH | Blower for a heating device, heating device 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 |
Cited By (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 |
| CN104675752A (en) * | 2015-03-16 | 2015-06-03 | 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 |
| CN111255751A (en) * | 2020-02-26 | 2020-06-09 | 浙江誉达汽车配件有限公司 | Automobile air conditioner condensation fan and processing equipment thereof |
| EP4253865A1 (en) * | 2022-03-30 | 2023-10-04 | Vaillant GmbH | Blower for a heating device, heating device and use of metal foam |
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| Publication number | Publication date |
|---|---|
| CN103032379B (en) | 2015-05-13 |
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