CN104481931A - Low-noise axial fan - Google Patents
Low-noise axial fan Download PDFInfo
- Publication number
- CN104481931A CN104481931A CN201410697791.8A CN201410697791A CN104481931A CN 104481931 A CN104481931 A CN 104481931A CN 201410697791 A CN201410697791 A CN 201410697791A CN 104481931 A CN104481931 A CN 104481931A
- Authority
- CN
- China
- Prior art keywords
- fan
- fan blade
- dashpot
- framework
- low noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts
- F04D29/547—Ducts having a special shape in order to influence fluid flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a low-noise axial fan. The axial fan comprises a fan, wherein the axis of the frame is provided with a fan, the fan is fixedly connected with a plurality of blades, and the outer edges at the air outlets of the blades are provided with raised lines; the inner surface of the frame is provided with annular tanks around the fan blades in the axial center of the fan. The low-noise axial fan provided by the invention is identical in rotating speed, low in air volume, low in noise, and comfortable to use.
Description
Technical field
The present invention relates to a kind of fan, particularly relate to the axial fan that a kind of noise is low.
Background technique
To be in the cooling fan that to carry in electrical article, OA, IT equipment for cooling heat-generating electronic part.In recent years, commercially, these family's electrical articles, the miniaturization of OA, IT equipment, high performance advance.
Increase for the heating value from electronic unit, as fan, usually adopt small-sized and be easy to obtain the small axial flow fan of air quantity.But for ensureing enough air quantity, axial fan has higher rotating speed, now air flow at high speed and motor itself all can produce larger noise, bring negative effect to the use of electronic equipment.
Summary of the invention
The present invention, for solving prior art problem, provides a kind of axial fan of low noise.
Technological scheme of the present invention is: a kind of low noise axial fan, comprises framework, and the axle center place of described framework is provided with blower fan, and described blower fan is fixedly connected with some fan blades, and the outward edge of described fan blade exhaust outlet side is provided with raised line; The axial centre position that described frame inner surface is positioned at described blower fan has the dashpot of the annular arranged around described fan blade.
As preferably, described raised line is provided with outward-dipping side.
As preferably, described dashpot along described fan shaft to antetheca and rear wall all perpendicular to the central shaft of described blower fan.
As preferably, the guide cone of the V-arrangement of described fan blade is pointed at the tip that the outer side wall of described dashpot is provided with an annular.
As preferably, the distance between the outermost point of described fan blade and described dashpot outer side wall is not more than 1/5 of described fan blade length.
As preferably, described fan blade favours described fan shaft to setting; The width of described dashpot to be not more than when described fan blade rotates projection width on said frame.
As preferably, described fan blade is fixedly installed on the outer surface of described blower fan; Described blower fan outer surface has the parallel wind groove of some and described fan blade between adjacent described fan blade.
As preferably, the spacing between adjacent described wind groove is equal.
As preferably, described fan blade air side is provided with flange near the central position of described blower fan.
As preferably, the length of described flange is not more than the half of described fan blade length; The thickness of described flange is not more than 5 times of described fan blade thickness.
As preferably, all flangings in described flange surface are circular arc chamfering.
Traditional axial fan operationally, complicated flow-disturbing can be formed between fan blade and framework, these flow-disturbings can produce much noise, the present invention is provided with raised line on the fan blade air side of axial fan, raised line adds effective camber of fan blade edge, increase the momentum of fan blade edge air-flow, thus make air-flow easily overcome the adverse pressure gradient of pressure side in edge, the separated region of pressure side is reduced, fan blade lift increases, when blast is constant and fan diameter does not increase, effectively can improve the air quantity of axial fan, and can noise be reduced, the side tilted increases the guide effect of air-flow, contribute to promoting this effect.The present invention is simultaneously at frame inner surface, along the turning circumference of fan blade, open a dashpot, when fan blade high speed rotating, a stable high velocity air can be formed in dashpot by the air of fan blade rotation disturbance, this air-flow can reduce the air pressure in space between fan blade and framework, when making the operation of conventional axial-flow fan, the air disturbance at this position is inhaled into air-flow, simultaneously this high velocity air due to direction identical with fan blade sense of rotation, therefore between fan blade and framework, form lubricating layer, effectively reduce fan blade resistance, reduce noise further.
In sum, the present invention has the following advantages:
1, under same rotational speed, air quantity, noise is lower, uses comfortable;
2, structure is simple, and improving cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is another viewing angle constructions schematic diagram of the present invention;
Fig. 3 is A-A anatomical structure schematic diagram in Fig. 2.
In figure, 1, framework, 2, fan blade, 3, stator, 4, rotor, 5, wind groove, 6, chamfering, 7, dashpot, 8, guide cone, 9, flange, 10, raised line, 11, side.
Embodiment
With embodiment, the invention will be further described below.
Embodiment one:
A kind of low noise axial fan, comprise framework 1, the axle center place of framework 1 is provided with blower fan, blower fan comprises the stator 3 be fixedly connected with framework 1, be arranged at the rotor 4 on stator 3, and be fixedly installed on rotor 4 fan blade 2 circumferentially, stator 3 is near the wind inlet of framework 1, rotor 4 is near the exhaust outlet of framework 1, and the wind inlet side that stator 3 is positioned at framework 1 is provided with chamfering 6.The outward edge of fan blade 2 exhaust outlet side is provided with raised line 10; Raised line 10 is provided with outward-dipping side 11.Fan blade 2 is fixedly installed on the outer surface of rotor 4; Rotor 4 outer surface has some wind grooves 5 parallel with fan blade 2 between adjacent fan blade 2, and the chamfering 6 of stator 3 extends to the ingress of wind groove 5 to rotor 4.Spacing between adjacent wind groove 5 is equal.At fan blade 2 and rotor 4, the external diameter between the termination of framework 1 exhaust outlet successively reduces along axially extending to framework 1 exhaust outlet direction of rotor 4 rotor 4, and the minimum outer diameter of rotor 4 is not less than 1/2 of maximum outside diameter.
The axial centre position that framework 1 internal surface is positioned at blower fan has the dashpot 7 of the annular arranged around fan blade 2, and the distance between the outermost point of fan blade 2 and dashpot 7 outer side wall is not more than 1/5 of fan blade 2 length.Dashpot 7 along fan shaft to antetheca and rear wall all perpendicular to the central shaft of blower fan, fan blade 2 favours fan shaft to setting; The width of dashpot 7 is not more than projection width when fan blade 2 rotates on framework 1.The outer side wall of dashpot 7 is provided with the guide cone 8 of the V-arrangement of the tip sensing fan blade 2 of an annular.
Fan blade 2 air side is provided with flange 9 near the central position of blower fan.The length of flange 9 is not more than the half of fan blade 2 length; The thickness of flange 9 is not more than 5 times of fan blade 2 thickness.The surperficial all flangings of flange 9 are circular arc chamfering.
The present invention operationally, in the process of exhausting, most of air is pushed to exhaust outlet from framework 1 hollow part through fan blade 2, has fraction air to be blocked in fan front by stator 3 and forms flow-disturbing, have fraction air by after chamfering 6 along rotor 4 outer surface, by wind groove 5 water conservancy diversion.Fan blade 2 is when high speed rotating, a stable high velocity air can be formed in dashpot 7 by the air of fan blade 2 rotation disturbance, this air-flow can reduce the air pressure in space between fan blade 2 and framework 1, when making the operation of conventional axial-flow fan, the air disturbance at this position is inhaled into air-flow, this high velocity air is identical with fan blade 2 sense of rotation due to direction simultaneously, therefore between fan blade 2 and framework 1, forms lubricating layer.Guide cone 8, for splitting high velocity air, makes high velocity air form a centre fast, the circulation that two ends are slow, strengthens further removing flow-disturbing effect, promotes lubrication effect.What flange 9 can strengthen fan blade 2 pushes away wind effect, under same rotational speed, promote air quantity.
Claims (6)
1. a low noise axial fan, comprises framework (1), and the axle center place of described framework (1) is provided with blower fan, and described blower fan is fixedly connected with some fan blades (2), it is characterized in that: the outward edge of described fan blade exhaust outlet side is provided with raised line (10); The axial centre position that described framework (1) internal surface is positioned at described blower fan has the dashpot (7) of the annular arranged around described fan blade (2).
2. low noise axial fan according to claim 1, is characterized in that: described raised line (10) is provided with outward-dipping side (11).
3. low noise axial fan according to claim 1, is characterized in that: described dashpot (7) along described fan shaft to antetheca and rear wall all perpendicular to the central shaft of described blower fan.
4. low noise axial fan according to claim 3, is characterized in that: the guide cone (8) of the V-arrangement of described fan blade (2) is pointed at the tip that the outer side wall of described dashpot (7) is provided with an annular.
5. low noise axial fan according to claim 4, is characterized in that: the distance between the outermost point of described fan blade (2) and described dashpot (7) outer side wall is not more than 1/5 of described fan blade (2) length.
6. low noise axial fan according to claim 1, is characterized in that: described fan blade (2) favours described fan shaft to setting; The width of described dashpot (7) is not more than projection width when described fan blade (2) rotates on described framework (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697791.8A CN104481931A (en) | 2014-11-28 | 2014-11-28 | Low-noise axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697791.8A CN104481931A (en) | 2014-11-28 | 2014-11-28 | Low-noise axial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104481931A true CN104481931A (en) | 2015-04-01 |
Family
ID=52756513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410697791.8A Pending CN104481931A (en) | 2014-11-28 | 2014-11-28 | Low-noise axial fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104481931A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795001A (en) * | 2020-07-06 | 2020-10-20 | 追觅科技(上海)有限公司 | Impeller and bladeless fan |
| WO2023074741A1 (en) * | 2021-10-29 | 2023-05-04 | 株式会社 東芝 | Fan |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070160459A1 (en) * | 2006-01-12 | 2007-07-12 | Rolls-Royce Plc | Blade and rotor arrangement |
| KR20080061427A (en) * | 2006-12-28 | 2008-07-03 | 엘지전자 주식회사 | Fan of an air conditioner |
| CN101482126A (en) * | 2009-02-05 | 2009-07-15 | 常熟市鼓风机有限公司 | Axial fan |
| US20110094460A1 (en) * | 2008-02-21 | 2011-04-28 | Borgwarner Inc. | Partial ring cooling fan |
| CN202007796U (en) * | 2010-12-13 | 2011-10-12 | 元山科技工业股份有限公司 | Fan frame |
| CN203453123U (en) * | 2013-09-07 | 2014-02-26 | 张正坤 | Noise reduction fan blade |
| CN104145118A (en) * | 2012-04-10 | 2014-11-12 | 夏普株式会社 | Propeller fan, fluid sending device, and mold for molding |
| CN204267382U (en) * | 2014-11-28 | 2015-04-15 | 德清振达电气有限公司 | A kind of low noise axial fan |
-
2014
- 2014-11-28 CN CN201410697791.8A patent/CN104481931A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070160459A1 (en) * | 2006-01-12 | 2007-07-12 | Rolls-Royce Plc | Blade and rotor arrangement |
| KR20080061427A (en) * | 2006-12-28 | 2008-07-03 | 엘지전자 주식회사 | Fan of an air conditioner |
| US20110094460A1 (en) * | 2008-02-21 | 2011-04-28 | Borgwarner Inc. | Partial ring cooling fan |
| CN101482126A (en) * | 2009-02-05 | 2009-07-15 | 常熟市鼓风机有限公司 | Axial fan |
| CN202007796U (en) * | 2010-12-13 | 2011-10-12 | 元山科技工业股份有限公司 | Fan frame |
| CN104145118A (en) * | 2012-04-10 | 2014-11-12 | 夏普株式会社 | Propeller fan, fluid sending device, and mold for molding |
| CN203453123U (en) * | 2013-09-07 | 2014-02-26 | 张正坤 | Noise reduction fan blade |
| CN204267382U (en) * | 2014-11-28 | 2015-04-15 | 德清振达电气有限公司 | A kind of low noise axial fan |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795001A (en) * | 2020-07-06 | 2020-10-20 | 追觅科技(上海)有限公司 | Impeller and bladeless fan |
| WO2023074741A1 (en) * | 2021-10-29 | 2023-05-04 | 株式会社 東芝 | Fan |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150401 |
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| WD01 | Invention patent application deemed withdrawn after publication |