CN203051227U - Low-noise centrifugal ventilating fan enclosure - Google Patents
Low-noise centrifugal ventilating fan enclosure Download PDFInfo
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- CN203051227U CN203051227U CN 201320002608 CN201320002608U CN203051227U CN 203051227 U CN203051227 U CN 203051227U CN 201320002608 CN201320002608 CN 201320002608 CN 201320002608 U CN201320002608 U CN 201320002608U CN 203051227 U CN203051227 U CN 203051227U
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- metal plate
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Abstract
The utility model discloses a low-noise centrifugal ventilating fan enclosure in the field of ventilating fan noise reduction technology. The ventilating fan enclosure is composed of a carbon structural steel inner layer, an inner layer sound-absorbing wiping material, a porous foam metal plate, an outer layer sound-absorbing wiping material and a carbon structural steel outer layer in a sequentially composite mode. The low-noise enclosure is simple in structure, light in weight and good in noise-reducing effect and has certain rigidness, use of metal material and cost are reduced, and the noise-reducing effect is about 10dB.
Description
Technical field
The utility model belongs to ventilator noise reduction technology field, particularly a kind of low-noise centrifugal formula ventilator casing.Be 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 big, 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 to the dispute that the influence of the work of surrounding resident and life causes.The blower fan noise reduction 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 the field conduct more complicated, even relate to the transformation of blower fan important structure, cost is higher, and the extensive use difficulty is very big aspect the blower fan noise reduction of reality; 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.
The model utility content
The purpose of this utility model is to focus mostly in the transformation of blower fan structure aspect at present blower fan noise reduction, such as importing and exporting at blower fan guide plate etc. is installed, and is installed additional noise elimination sound proof box etc.But field conduct more complicated, even relate to the transformation of blower fan important structure, the deficiency that cost is higher, a kind of low-noise centrifugal formula ventilator casing is provided, it is characterized in that the formation of described low-noise centrifugal formula ventilator casing: compoundly successively from the fan casing internal layer to skin be: structural carbon steel internal layer 1, internal layer sound absorption 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.
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 with straight trough 7 between each piece porous foam metal plate.
The beneficial effects of the utility model are to select different porosities porous metal material and the sound absorption material of wiping one's face according to actual conditions, 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 formula ventilator casing overall structure schematic representation.
Fig. 2 is low-noise centrifugal formula ventilator casing partial structurtes schematic representation.
Embodiment
The utility model proposes a kind of low-noise centrifugal formula ventilator casing.Illustrated below in conjunction with accompanying drawing.
In Fig. 1, low-noise centrifugal formula ventilator casing structure schematic representation shown in Figure 2, low-noise centrifugal formula ventilator 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 constitutes 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 (as shown in Figure 2) with straight trough 7 between each piece porous foam metal plate.
Principle of noise reduction of the present utility model 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 little hole plug, played certain sound insulation effect simultaneously, guarantees that noise reduces 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 formula ventilator casing, it is characterized in that the formation of described low-noise centrifugal formula ventilator casing: from the fan casing internal layer to skin by the sound absorption of structural carbon steel internal layer (1), internal layer wipe one's face material (2), porous foam metal plate (3), outer material (4) and structural carbon steel skin (5) the compound formation successively of wiping one's face that absorbs sound.
2. low-noise centrifugal formula ventilator casing according to claim 1 is characterized in that, utilizes rivet to fix between described porous foam metal plate and the structural carbon steel internal layer, adopts straight tenon (6) to be connected with straight trough (7) between each piece porous foam metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320002608 CN203051227U (en) | 2013-01-05 | 2013-01-05 | Low-noise centrifugal ventilating fan enclosure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320002608 CN203051227U (en) | 2013-01-05 | 2013-01-05 | Low-noise centrifugal ventilating fan enclosure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051227U true CN203051227U (en) | 2013-07-10 |
Family
ID=48734185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320002608 Expired - Fee Related CN203051227U (en) | 2013-01-05 | 2013-01-05 | Low-noise centrifugal ventilating fan enclosure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051227U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032379A (en) * | 2013-01-05 | 2013-04-10 | 华北电力大学（保定） | Low-noise centrifugal ventilator casing |
| CN110657129A (en) * | 2019-10-31 | 2020-01-07 | 江苏科技大学 | Centrifugal fan volute with noise reduction function by adopting perforated plate |
-
2013
- 2013-01-05 CN CN 201320002608 patent/CN203051227U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032379A (en) * | 2013-01-05 | 2013-04-10 | 华北电力大学（保定） | Low-noise centrifugal ventilator casing |
| CN103032379B (en) * | 2013-01-05 | 2015-05-13 | 华北电力大学（保定） | Low-noise centrifugal ventilator casing |
| CN110657129A (en) * | 2019-10-31 | 2020-01-07 | 江苏科技大学 | Centrifugal fan volute with noise reduction function by adopting perforated plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20150105 |
|
| EXPY | Termination of patent right or utility model |