CN204961404U - Low -noise centrifugal fan - Google Patents
Low -noise centrifugal fan Download PDFInfo
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- CN204961404U CN204961404U CN201520780773.6U CN201520780773U CN204961404U CN 204961404 U CN204961404 U CN 204961404U CN 201520780773 U CN201520780773 U CN 201520780773U CN 204961404 U CN204961404 U CN 204961404U
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Abstract
The utility model relates to a low -noise centrifugal fan, including volute blower, locate the impeller in the volute blower and be used for providing the motor of power for the impeller, volute blower is bilayer structure, and volute blower comprises inlayer coverboard and outer coverboard promptly, the surface lining of volute blower's inlayer coverboard posts sound absorbent, sound absorbent with leave the cavity between volute blower's the outer coverboard. The utility model discloses at the operation in -process, can eliminate partly noise through sound absorbent's absorption, and the cavity between sound absorbent and volute blower's the outer coverboard can prevent further that sound from spreading to can effectively reduce the fan noise, ensure that furthest alleviates the noise pollution of centrifugal fan to the surrounding environment, and the utility model discloses simple structure, little to the existing equipment change, low in manufacturing cost.
Description
Technical field
The utility model relates to centrifugal blower technical field, relates in particular to a kind of low-noise centrifugal fan.
Background technique
Current known centrifugal blower is joined direct-coupled electrical machinery primarily of parts such as impeller, casing, intake grills and forms.Centrifugal blower is the mechanical energy relying on input, and improve gas pressure and to supply gas side by side the machinery of body, it is a kind of driven fluid machinery.Centrifugal blower is widely used in factory, mine, tunnel, cooling tower, vehicle, the ventilation of boats and ships and building, dust discharge and cooling; The ventilation of boiler and industrial furnace and air inducing; Cooling in the apparatus of air conditioning and domestic electric appliance and ventilation; The oven dry of cereal and selecting and recommending; The inflation of wind-tunnel wind regime and Hovercraft and propelling etc.
But noise pollution is centrifugal blower run in the deadly defect that exists, reduce the noise of centrifugal fan for this reason, significant to ensureing operator healthy and improving the economic benefit etc. of enterprise.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of low-noise centrifugal fan, and this centrifuge effectively reduces fan noise, and structure is simple, change little to existing equipment.
In order to solve the problems of the technologies described above, the utility model adopts following technological scheme: a kind of low-noise centrifugal fan, comprise volute of blower, be located at impeller in volute of blower and for providing the motor of power to impeller, described volute of blower is double layer construction, namely volute of blower is made up of inner skin and outer coverboard, the outer surface lining of the inner skin of described volute of blower posts sound-absorbing material, leaves cavity between described sound-absorbing material and the outer coverboard of described volute of blower.
Further, the exhaust port place of described volute of blower is also provided with silencing apparatus.
Further, described impeller adopts alloy steel material 40CrNiMo7 to make.
Further, described volute of blower is covered with a sound proof box, and the casing of described sound proof box is multi-layer structure, and the casing of described sound proof box comprises fireproof plate, deadening felt, FC insulation board from inside to outside successively and is pasted onto the fireproof acoustic cotton of FC insulation board outer surface.
The beneficial effects of the utility model are: the utility model is in running, a part of noise can be eliminated by the absorption of sound-absorbing material, and the cavity between sound-absorbing material and the outer coverboard of volute of blower can prevent sound dispersion further, thus effectively can reduce fan noise, guarantee to alleviate the noise pollution of centrifugal blower to surrounding environment to greatest extent; And the utility model structure is simple, change little to existing equipment, low cost of manufacture.
Accompanying drawing explanation
Fig. 1 is the plan view of the utility model one embodiment.
Fig. 2 is the left view of Fig. 1.
Being labeled as of each parts in accompanying drawing: 1 motor, 2 impellers, 3 volute of blower, 4 sound-absorbing materials, 5 sound proof boxs, 6 silencing apparatuss.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
See Fig. 1 and Fig. 2.For succinct description, in Fig. 2, eliminate sound proof box 5.
The low-noise centrifugal fan of the utility model one embodiment, comprise volute of blower 3, be located at impeller 2 in volute of blower 3 and for providing the motor 1 of power to impeller 2, described volute of blower 3 is double layer construction, namely volute of blower 3 is made up of inner skin and outer coverboard, the outer surface lining of the inner skin of described volute of blower 3 posts sound-absorbing material 4, leaves cavity between described sound-absorbing material 4 and the outer coverboard of described volute of blower 3.During concrete enforcement, mineral wool selected by sound-absorbing material 4.
As illustrated in fig. 1 and 2, in the present embodiment, the exhaust port place of described volute of blower 3 is also provided with silencing apparatus 6.The built-in noise elimination inserted sheet of silencing apparatus 6, make noise by cutting down during silencing apparatus 6, silencing apparatus 6 reduces air powered equipment inlet and outlet mouth radiation or the effective measures along pipe passing noise.
In the present embodiment, described impeller 2 adopts alloy steel material 40CrNiMo7 to make.Impeller 2 adopts alloy steel material 40CrNiMo7 material to make, and have lightweight, that intensity is high advantage, noise in operating is low.Impeller 2 is made up of the arc thin plate type blade of 10 hypsokinesis, curved shroud and dull and stereotyped hub disk, they all manufacture with steel plate, and through dynamic and static balance correction, air is functional, efficiency is high, smooth running, thus the noise pollution to surrounding environment when reducing blower fan work further, improve environment around.
As shown in Figure 1, in the present embodiment, described volute of blower 3 is covered with a sound proof box 5, and the casing of described sound proof box 5 is multi-layer structure, and the casing of described sound proof box 5 comprises fireproof plate, deadening felt, FC insulation board from inside to outside successively and is pasted onto the fireproof acoustic cotton of FC insulation board outer surface.Sound proof box 5 is set and can reduces fan noise further.
The working procedure of the low-noise centrifugal fan of the utility model one embodiment is: when impeller 2 is by motor 1 driven rotary, its gas enters from the intake grill of volute of blower 3 and is filled between the blade of impeller 2, then gas high speed rotating thereupon under the promotion of the blade of impeller 2, gas is made to obtain large energy, under the effect of inertia high mental and physical efforts, get rid of toward impeller 2 outer rim, after the pressure energy of gas and kinetic energy increase, flow out from the exhaust port of volute of blower 3, then negative pressure is formed in the middle part of impeller 2, under the effect of atmospheric pressure, suction gas is supplemented continually, blower fan is in running, by the absorption of sound-absorbing material 4, the stop of cavity, the stop of sound proof box 5 and the noise reduction process of silencing apparatus 6, effectively can reduce fan noise, guarantee to alleviate the noise pollution of centrifugal blower to surrounding environment to greatest extent.Sound absorption is the phenomenon that sound wave strikes energy loss after material surface, and sound absorption can reduce indoor sound pressure level, stops and reduces sonic propagation of making an uproar, and controls air power noise and propagates outward.
In concrete enforcement, side plate and intake grill integral type, form overall side plate, and impeller and arbor adopt tensioning sleeve to be connected.Owing to adopting side plate and intake grill integral structure, intensity is high, good rigidly, beautiful shape, saving material, and easy for installation, air inlet effect good.
Install one section of rubber hose at the intake grill of volute of blower 3 and exhaust port place, the vibration that blower fan can be passed to airduct obtains at rubber hose place and weakens to the limit or eliminate;
Produce strong air power noise during blower fan High Rotation Speed, for stoping sound propagate and allow air-flow to pass through, on fan airflow passage, load onto silencer outward, the noise that blower fan itself is occurred and ducted aerodynamic noise reduce;
The arc section position of volute of blower 3 forms many eddy current, and eddy current will produce with volute of blower and intake grill component and repeatedly collides continually and form aerodynamic noise.The present invention is positioned at volute of blower inside peripheral place at air inlet place designs and produces and namely sets up rectification circle and baffle plate, just can effectively prevent air-flow from forming eddy current at air inlet place, thus reduces the aerodynamic noise that centrifugal blower produces.
In concrete enforcement, volute of blower 3 can make two kinds of different types, and a kind of casing as a whole, can not be taken apart, and a kind of system three is split into formula, and except in edge, a point horizontal plane is divided into 2 half, the first half centrally vertical dimidiation of line again, connects with bolt;
The intake grill of volute of blower 3 makes entirety, is loaded on the side of centrifugal blower, is curve shape with the cross section of parallel to an axis, and gas can be made to enter impeller smoothly, and loss is less;
The drive part of centrifugal blower comprises main shaft, bearing housing, rolling bearing and belt wheel.In one-stage centrifugal blower fan, gas is from axially entering impeller, gas flow changes over radial direction when impeller, then Diffuser is entered, in Diffuser, gas and changing flow direction causes deceleration, and this decelerating effect converts kinetic energy to pressure energy, pressure increases and mainly occurs in impeller, and next occurs in diffusion process.In Multi-stage centrifugal fan, make air-flow enter next impeller with return channel, produce more high pressure.
During this external fan operation, blower fan is placed in independently in blower fan isolation booth, carries out absorbing sound in blower fan, process of insulating against sound.
Be to be understood that example as herein described and mode of execution only in order to illustrate, those skilled in the art can make various amendment or change according to it, when not departing from the utility model Spirit Essence, all belong to protection domain of the present utility model.
Claims (4)
1. a low-noise centrifugal fan, comprise volute of blower (3), be located at impeller (2) in volute of blower (3) and for providing the motor (1) of power to impeller (2), it is characterized in that: described volute of blower (3) is double layer construction, namely volute of blower (3) is made up of inner skin and outer coverboard, the outer surface lining of the inner skin of described volute of blower (3) posts sound-absorbing material (4), leaves cavity between the outer coverboard of described sound-absorbing material (4) and described volute of blower (3).
2. low-noise centrifugal fan as claimed in claim 1, is characterized in that: the exhaust port place of described volute of blower (3) is also provided with silencing apparatus (6).
3. low-noise centrifugal fan as claimed in claim 1 or 2, is characterized in that: described impeller (2) adopts alloy steel material 40CrNiMo7 to make.
4. low-noise centrifugal fan as claimed in claim 1 or 2, it is characterized in that: described volute of blower (3) is covered with a sound proof box (5), the casing of described sound proof box (5) is multi-layer structure, and the casing of described sound proof box (5) comprises fireproof plate, deadening felt, FC insulation board from inside to outside successively and is pasted onto the fireproof acoustic cotton of FC insulation board outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520780773.6U CN204961404U (en) | 2015-09-30 | 2015-09-30 | Low -noise centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520780773.6U CN204961404U (en) | 2015-09-30 | 2015-09-30 | Low -noise centrifugal fan |
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| Publication Number | Publication Date |
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| CN204961404U true CN204961404U (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520780773.6U Active CN204961404U (en) | 2015-09-30 | 2015-09-30 | Low -noise centrifugal fan |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715567A (en) * | 2016-03-07 | 2016-06-29 | 苏州保酚环境科技有限公司 | Low-noise ventilator |
| CN106015101A (en) * | 2016-08-03 | 2016-10-12 | 广东美的制冷设备有限公司 | Volute, fan and air conditioning equipment, |
| CN107575420A (en) * | 2017-10-25 | 2018-01-12 | 山西彩云归科技有限公司 | For blower fan noise reduction method and can be blower fan noise reduction device |
| CN108953193A (en) * | 2018-08-22 | 2018-12-07 | 江苏冠愉电机科技有限公司 | A kind of noise-reduction type fiberglass blower fan |
| CN109664659A (en) * | 2018-12-26 | 2019-04-23 | 凌云工业股份（芜湖）有限公司 | A kind of low noise automatic cutting plotter |
-
2015
- 2015-09-30 CN CN201520780773.6U patent/CN204961404U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715567A (en) * | 2016-03-07 | 2016-06-29 | 苏州保酚环境科技有限公司 | Low-noise ventilator |
| CN106015101A (en) * | 2016-08-03 | 2016-10-12 | 广东美的制冷设备有限公司 | Volute, fan and air conditioning equipment, |
| CN107575420A (en) * | 2017-10-25 | 2018-01-12 | 山西彩云归科技有限公司 | For blower fan noise reduction method and can be blower fan noise reduction device |
| CN107575420B (en) * | 2017-10-25 | 2023-12-19 | 山西彩云归科技有限公司 | Method for reducing noise of fan and device capable of reducing noise of fan |
| CN108953193A (en) * | 2018-08-22 | 2018-12-07 | 江苏冠愉电机科技有限公司 | A kind of noise-reduction type fiberglass blower fan |
| CN109664659A (en) * | 2018-12-26 | 2019-04-23 | 凌云工业股份（芜湖）有限公司 | A kind of low noise automatic cutting plotter |
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