CN101825114A - Axial flow fan capable of reducing energy consumption and noise - Google Patents
Axial flow fan capable of reducing energy consumption and noise Download PDFInfo
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- CN101825114A CN101825114A CN200910126673A CN200910126673A CN101825114A CN 101825114 A CN101825114 A CN 101825114A CN 200910126673 A CN200910126673 A CN 200910126673A CN 200910126673 A CN200910126673 A CN 200910126673A CN 101825114 A CN101825114 A CN 101825114A
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Abstract
The invention relates to an axial flow fan capable of reducing energy consumption and noises, which is characterized in that an angle beta between a paddle negative pressure surface and the radial direction of the axial flow fan is between zero degree and 90 degrees, or the average angle beta between the paddle negative pressure surface and the radial direction of the axial flow fan is between zero degree and 90 degrees. The previous axial flow fan with a single-sided arc-shaped edge paddle structure cannot technically ensure expected energy-saving and noise-reduction effect. A great number of researches show that the axial flow fan with the single-sided arc-shaped edge paddle structure has an angle beta range with energy-saving and noise-reduction effect and an optimum angle beta range. According to experimental data, when the angle is within the angle beta range, the energy consumption and the noises of the axial flow fan with the single-sided arc-shaped edge paddle structure can be greatly decreased, the energy consumption and the noises can be decreased by more than 50 percent under the condition of the same air flow, and thereby the technical scheme is suitable for all kinds of axial flow fans and axial flow fluid delivery or agitation machines.
Description
Affiliated technical field
The present invention relates to a kind of axial fan, especially can improve the efficient of axial fan, cut down the consumption of energy and the technology of noise.
Background technique
The inventor cooperates to have submitted a patent application in 2000 to China Intellectual Property Office with other inventors, denomination of invention " high-performance propeller cavitation ", number of patent application CN00111209.0, calendar year 2001 is submitted international patent application to, international application no: pct/cn01/00112, this application relates to a kind of axial fan technology with monolateral arc limb blade structure, and present techniques is further developing on above-mentioned technical foundation.
Position, movement locus, kinetic characteristic to monolateral arc limb in the international specification referred have following description: " the basic and propeller cavitation concentric of limb each several part; limb function same section substantially on identical turning radius, requires limb only to produce surface friction drag in sense of rotation at the propeller cavitation axis projection in principle.Have under the situation of inclination angle at limb, limb can produce the shape power that increases or reduce blade end of blade pressure.As required, limb can suitably launch with approximate involute pattern in the blade sense of rotation ".
Foregoing axial fan technology with monolateral arc limb blade structure, in experiment, find the monolateral arc limb of identical shape and structure, on a part of axial fan, use that the energy-saving and noise-reducing effect is very good, and on another part axial fan, but do not have the energy-saving and noise-reducing effect.Owing to unclear is what reason, therefore can't safe design this have the energy-saving and noise-reducing effect axial fan, seriously hindered this The Application of Technology.
Summary of the invention
The present invention pinpoints the problems irrelevant with monolateral arc limb structure, shape, position, space motion path etc. by a large amount of development tests, by a large amount of tests with discover that the angle β between blade negative pressure face and axial fan are radially has key effect to the energy-conserving action effect, when angle β be on the occasion of, the axial fan of monolateral arc limb blade structure has extraordinary energy-saving and noise-reducing effect, as shown in Figure 1; When angle β is a negative value, the axial fan energy-saving and noise-reducing effect of monolateral arc limb blade structure is very little, does not even have the energy-saving and noise-reducing effect, as shown in Figure 2.
Discovering, is under situation at angle β, and blade negative pressure face can access sufficient fluid and replenish, and the pressure absolute value of blade negative pressure face is reduced, and resists, blade resistance and energy consumption all are reduced thereby reduced blade pressure.Because the pressure absolute value of blade negative pressure face reduces, reduce with the pressure difference of surrounding space, fluid reduces to the moving speed of blade negative pressure surface current, the therefore also corresponding reduction of strength of vortex that produces, noise also obtains corresponding reduction.The above-mentioned blade end of blade most pronounced effects that acts on, because be that the fan linear velocity is the fastest here, the every active force maximum that produces, the position that pressure gradient is also maximum, and in the roulette velocity range that most fans use, therefore the active force that blade negative pressure face produces reduces blade negative pressure face pressure absolute value, energy-saving and noise-reducing effect highly significant much larger than the positive pressure face.
The technical solution adopted for the present invention to solve the technical problems is: the axial fan blade with monolateral arc limb blade structure, this blade negative pressure face and the axial fan angle β between radially at 0 degree between 90 degree, or axial fan blade with monolateral arc limb blade structure, this blade negative pressure face and the axial fan average angle β between radially at 0 degree between 90 degree, research and test find angle β or average angle β angle value optimum range at 0 degree between 45 degree.
The invention has the beneficial effects as follows, for monolateral arc limb blade The Application of Technology has been cleared away technology barrier, for manufacture and design high efficiency, the low noise axial fan is laid a good foundation and feasible embodiment is provided, avoided under the unclear situation of energy-saving and noise-reducing principle, do not have under the reliable technical application scheme condition, blindly design the loss that causes, make monolateral this energy-saving and noise-reducing technology of arc limb blade reach application level.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 be blade negative pressure face and the axial fan angle β between radially on the occasion of diagram.
Fig. 2 is that blade negative pressure face and the axial fan angle β between radially is the diagram of negative value.
Fig. 3 is that the surface of monolateral arc limb and blade negative pressure face link position is under the curve form situation, the diagram of blade negative pressure face and the fan average angle β between radially.
Fig. 4 is that blade negative pressure face is under the curve form situation, the diagram of blade negative pressure face and the fan average angle β between radially.
Fig. 5 adopts monolateral arc limb and the into a single integrated structure blade of paddle-shaped, does not have obvious separatrix between monolateral arc limb and the blade, in the case, and the diagram of blade negative pressure face and the axial fan average angle β between radially.
Fig. 6 is a title and concrete corresponding position schematic representation of describing the axial fan each several part employing of monolateral arc limb blade structure.
1. blades among the figure, 2. propeller hub, 3. propeller shank, 4. blade tips, 5. monolateral arc limb, 6. by axial fan radially to the moving fluid of blade negative pressure surface current, 7. blade negative pressure face.
The present invention is further described below in conjunction with drawings and Examples
In the embodiment shown in fig. 1, have the negative pressure face (7) of blade (1) of monolateral arc limb and axial fan radially between angle β angle numerical value on the occasion of, outside by blade tips (4), can arrive the boundary layer of blade negative pressure face (7) along the fluid (6) of axial fan Radial Flow, can reduce the pressure absolute value of blade negative pressure face (7), reduce the pressure opposing of blade, thereby reduce the blade resistance, reduce the blade energy consumption, reduce noise.
Shown in Figure 2, blade negative pressure face (7) and axial fan radially between the angle numerical value of angle β be negative value.By the outside of blade tips (4), can not arrive the boundary layer of blade negative pressure face (7) along the fluid (6) of axial fan Radial Flow, the pressure of blade negative pressure face (7) does not have to change substantially, does not therefore have the energy-saving and noise-reducing effect.
In the embodiment shown in fig. 3, blade negative pressure face (7) and axial fan radially between the angle numerical value of average angle β be on the occasion of, monolateral arc limb (5) is a curve form with blade negative pressure face (7) link position surface, along this curve form to the moving fluid of blade negative pressure surface current, energy loss is little, the eddy current vorticity reduces, and the energy-saving and noise-reducing effect further improves.
In the embodiment shown in fig. 4, blade negative pressure face and axial fan radially between the angle numerical value of average angle β be on the occasion of, monolateral arc limb (5) axial fan relatively axially has camber angle, fluid is moving to blade negative pressure surface current with the curved surface that blade negative pressure face link position surface constitutes along monolateral arc limb (5) and monolateral arc limb (5), energy loss is littler, and the energy-saving and noise-reducing effect further improves.
In the embodiment shown in fig. 5, monolateral arc limb and the into a single integrated structure blade of paddle-shaped, there is not obvious separatrix between monolateral arc limb and the blade, blade negative pressure face becomes curve form with monolateral arc limb integral body, integrative-structure blade negative pressure face and fan radially between the angle numerical value of average angle β be on the occasion of, in propeller shank (3) and mid blade near propeller hub, blade negative pressure face and fan radially between the angle numerical value of average angle β be negative value, because angle β is that negative loop blade linear velocity is lower, influence does not play a major role to the whole energy noise reduction, and axial fan integral body still has energy-saving and noise-reducing effect preferably.
Axial flow compressor adopts this technology, the particularly first order, can increase the fluid intake, reduces tip clearance leakage loss, reduces power consumption, improves compression performance.
The technology of the present invention can be applied to fluid machineries such as the propeller cavitation, axial-flow blower, axial flow blower, axial flow compressor, fan, axial-flow pump, Pneumatic extinguisher of various FLUID TRANSPORTATION purposes, or the fluid machinery of various stirred fluids.
Blade of the present invention can adopt method manufacturings such as casting, die casting, injection moulding, punching press, machine cut, welding, sheet metal, composite material be bonding.
Illustrate:
Average angle β: line and the axial fan angle radially of getting the curve two ends are average angle β; Or get the tangent line of curve each point and the mean value of axial fan angle radially is average angle β.
Setting shaft flow fan of the present invention axially is orthogonal with axial fan radially.
Claims (2)
1. one kind cuts down the consumption of energy and the axial fan of noise, some blades (1) are installed on propeller hub (2), monolateral arc limb (5) is arranged on blade (1), or the blade that some monolateral arc limbs (5) and blade (1) form integrative-structure is installed on propeller hub (2), it is characterized in that: between 90 degree, or blade negative pressure face and the axial fan average angle β between radially is between spend to 90 by 0 degree at 0 degree for blade negative pressure face and the axial fan angle β between radially.
2. axial fan according to claim 1 is characterized in that: between 45 degree, or blade negative pressure face and the axial fan average angle β between radially is between spend to 45 by 0 degree at 0 degree for blade negative pressure face and the axial fan angle β between radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910126673A CN101825114A (en) | 2009-03-06 | 2009-03-06 | Axial flow fan capable of reducing energy consumption and noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910126673A CN101825114A (en) | 2009-03-06 | 2009-03-06 | Axial flow fan capable of reducing energy consumption and noise |
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| Publication Number | Publication Date |
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| CN101825114A true CN101825114A (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910126673A Pending CN101825114A (en) | 2009-03-06 | 2009-03-06 | Axial flow fan capable of reducing energy consumption and noise |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373383A (en) * | 2014-11-28 | 2015-02-25 | 德清振达电气有限公司 | Efficient blade of axial fan |
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| CN2414237Y (en) * | 2000-02-25 | 2001-01-10 | 张�诚 | Wide blowing angle ceiling fan |
| CN2437887Y (en) * | 2000-07-10 | 2001-07-04 | 安徽天大(集团)股份有限公司工程塑料厂 | Axial ventilator with hemmed blade |
| CN1334218A (en) * | 2000-07-13 | 2002-02-06 | 韩玮 | High-performance propeller |
| CN1414248A (en) * | 2002-07-12 | 2003-04-30 | 四川工业学院 | Axial flow pump impeller vane |
| CN1522343A (en) * | 2002-02-28 | 2004-08-18 | ͬ�Ϳ�ҵ��ʽ���� | Fan |
| CN1746515A (en) * | 2004-09-06 | 2006-03-15 | 台达电子工业股份有限公司 | Radiating fan |
| CN1793670A (en) * | 2004-12-21 | 2006-06-28 | 东芝开利株式会社 | Tube-axial fan, outdoor unit of air conditioner |
| US20080253896A1 (en) * | 2007-04-13 | 2008-10-16 | Walls Gary C | High efficiency fan blades with airflow-directing baffle elements |
| JP2008255966A (en) * | 2007-04-09 | 2008-10-23 | Mitsubishi Electric Corp | Propeller fan |
| CN201212489Y (en) * | 2008-03-12 | 2009-03-25 | 韩玮 | Axial flow fan for reducing energy consumption and noise |
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2009
- 2009-03-06 CN CN200910126673A patent/CN101825114A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4693673A (en) * | 1982-08-09 | 1987-09-15 | Nee Victor W | Ceiling fan |
| CN2414237Y (en) * | 2000-02-25 | 2001-01-10 | 张�诚 | Wide blowing angle ceiling fan |
| CN2437887Y (en) * | 2000-07-10 | 2001-07-04 | 安徽天大(集团)股份有限公司工程塑料厂 | Axial ventilator with hemmed blade |
| CN1334218A (en) * | 2000-07-13 | 2002-02-06 | 韩玮 | High-performance propeller |
| CN1522343A (en) * | 2002-02-28 | 2004-08-18 | ͬ�Ϳ�ҵ��ʽ���� | Fan |
| CN1414248A (en) * | 2002-07-12 | 2003-04-30 | 四川工业学院 | Axial flow pump impeller vane |
| CN1746515A (en) * | 2004-09-06 | 2006-03-15 | 台达电子工业股份有限公司 | Radiating fan |
| CN1793670A (en) * | 2004-12-21 | 2006-06-28 | 东芝开利株式会社 | Tube-axial fan, outdoor unit of air conditioner |
| JP2008255966A (en) * | 2007-04-09 | 2008-10-23 | Mitsubishi Electric Corp | Propeller fan |
| US20080253896A1 (en) * | 2007-04-13 | 2008-10-16 | Walls Gary C | High efficiency fan blades with airflow-directing baffle elements |
| CN201212489Y (en) * | 2008-03-12 | 2009-03-25 | 韩玮 | Axial flow fan for reducing energy consumption and noise |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373383A (en) * | 2014-11-28 | 2015-02-25 | 德清振达电气有限公司 | Efficient blade of axial fan |
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