CN102251931A - Vertical shaft wind driven generator - Google Patents
Vertical shaft wind driven generator Download PDFInfo
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- CN102251931A CN102251931A CN2011101499070A CN201110149907A CN102251931A CN 102251931 A CN102251931 A CN 102251931A CN 2011101499070 A CN2011101499070 A CN 2011101499070A CN 201110149907 A CN201110149907 A CN 201110149907A CN 102251931 A CN102251931 A CN 102251931A
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- fan blade
- wind
- vertical axis
- wind wheel
- central shaft
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- 238000000465 moulding Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 abstract description 4
- 239000003365 glass fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 241001264313 Semioptera wallacii Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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Abstract
The invention is suitable for the field of wind driven generators and provides a vertical shaft wind driven generator. The vertical shaft wind driven generator comprises a longitudinal central shaft, and at least two fan blades which are axially arranged along a central shaft and are bent to form spiral shapes; the central shaft is coaxially provided with a generator; the fan blades are connected with the central shaft through cross beams; and a 360-degree wind wheel of which the plan view is circular is formed by enclosing the fan blades. In the vertical shaft wind driven generator, the 360-degree wind wheel of which the plan view is circular and is formed by enclosing the fan blades is adopted to ensure the 360-dgree wind facing of the wind wheel, so that the fan blades have the optimal attack angles when the wind wheel rotates, and the wind wheel can be started at low wind speed, the possibility that the wind wheel stops rotating under the same condition is avoided, the generator can generate electricity at the low speed, and the problem that the output power is reduced due to the attack angle change caused by the rotation of the wind wheel at low wind speed and the wind impeller easily stops rotation at the low wind speed in the conventional straight-sheet fan blade is solved.
Description
Technical field
The invention belongs to the wind-driven generator field, relate in particular to a kind of vertical axis aerogenerator.
Background technique
As depicted in figs. 1 and 2, existing vertical axis aerogenerator comprises a vertical central axis 91 and at least two fan blades 92 along the central shaft 91 axial flat that are provided with, the coaxial generator (not shown) that is provided with on the central shaft 91, connect by a plurality of crossbeams 93 between fan blade 92 and the central shaft 91, and form a wind wheel.Fan blade 92 acting as in vertical axis aerogenerator: fan blade 92 is by rotating machinery (wheel hub with wind energy, connecting rod etc.) produce rotatablely moving between generator amature and the stator, thereby produce the electric energy of output, be core component in the whole generating machine system, the aeroperformance of fan blade 92 has directly influenced the efficient of the output power (generated energy) of wind-driven generator.
As Fig. 1～shown in Figure 4, the fan blade 92 of present vertical axis aerogenerator is straight, fan blade 92 is under the driving of wind-force, meeting appearance different fan blades 92 as shown in Figure 3 are in the locational variation of synchronization, Fig. 3 and Fig. 4 combine and see, we will find that α angle among Fig. 4 for different fan blade 92, all is different at synchronization with the different moment.This α angle is defined as the angle of attack (Angle of Attack) in aeronautical dynamics, be the angle of the chord length and the inflow velocity direction of fan blade 92; This angle is the angle of aircraft or wing and horizontal plane in aircraft, and the leading edge of wing and the line of trailing edge are referred to as the string of a musical instrument, and the angle of the relative wind and the string of a musical instrument is exactly the angle of attack of operational aircraft, and aircraft increases the angle of attack, and reaching increases the purpose that lift takes off fast.And for the wind-driven generator of vertical shaft, increase the angle of attack, reach the purpose that increases the lift quick starting and improve generated energy.
The aerofoil profile of every kind of fan blade 92 all has its best angle of attack, and the so-called best angle of attack is exactly when this best angle of attack, power coefficient Cp maximum, and this also means the output power of wind-driven generator (generated energy just) maximum at this moment.As shown in Figure 5, fan blade 92 angle of attack be approximately 0 when spending, power coefficient Cp maximum.
Pass between output power P of wind-driven generator (generated energy just) and the power coefficient (Cp) is: P=0.5 ρ AV*V*V*Cp* η (equation 1)
Wherein: ρ=air pressure (kPa); The wind sweeping area of A=wind wheel; η=machinery driving efficiency and electronic switch efficient; V=wind speed (m/s).
As can be seen, for same vertical axis aerogenerator, output power P (generated energy just) and power coefficient (Cp) are the relations that is directly proportional from equation 1, and Cp is big more, and P is also just big more.Just change and talk about, when the best angle of attack, the output power P of wind-driven generator (generated energy just) is maximum in other words.
How does angle of attack influence Cp so? we need introduce lift coefficient Cl and resistance coefficient Cd and infinitesimal calculus formula:
DP=K*Cx* δ r*V (equation 2)
The output power P of dP=wind-driven generator (generated energy just) wherein; K=is for the structural coefficient of the wind-driven generator of certain structure; Cx=normal direction coefficient; The function of r=wind wheel radius r; The V=wind speed;
Cx=Clcos ψ+Cdsin ψ (equation 3)
Wherein: ψ is an inflow angle, and Cl is a lift coefficient, and Cd is a resistance coefficient.As shown in Figure 4, the inflow velocity of ψ reflection fan blade 92 and the angle between the wind wheel plane of rotation.
ψ=alpha+beta (equation 4)
Wherein: α is the angle of attack, and β is an established angle.
According to Fig. 4, established angle β is meant the chord length (being the front and rear edge line of aerofoil profile) of fan blade 92 and the angle of wind wheel plane of rotation), for vertical axis aerogenerator, after fan blade 92 mechanical fixation, this established angle β is just fixing, is a steady state value.
In conjunction with equation 2, equation 3, equation 4, we are not difficult to find out Cl, Cd and α have directly determined the output power P (generated energy just) of dP=wind-driven generator in the rotation of fan blade 92.
And Cl, the relation between Cd and the α as shown in Figure 6, lift coefficient Cl and and resistance coefficient Cd change with angle of attack, the Cl-α in usage range is linear relationship substantially; When angle of attack increased to a certain degree, lift coefficient Cl reached maximum value Clmax, and fan blade obtains maximum lift; Angle of attack when lift coefficient Cl reaches maximum value Clmax is exactly the best angle of attack, the power coefficient that Cp at this moment is just maximum.
According to energy conservation principle, when angle of attack was exactly the best angle of attack, under identical wind speed, the fan blade of this moment had produced maximum thrust Fmax and maximum output power Pmax,
Pmax=Fmax*V (equation 5)
The output power of Pmax=maximum wherein; The thrust of Fmax=maximum; The V=wind speed.
So, the approaching as far as possible and best angle of attack of maintenance, vertical axis aerogenerator can produce bigger and maximum output power P (just bigger and maximum generated energy).
In a word: it is exactly because angle of attack is a dynamic value that of vertical axis aerogenerator with straight sheet fan blade 92 influences the generated energy problem, the α value will constantly change with the rotation of wind wheel, when hanging down wind speed (this moment, wind wheel can not carry out 360 ° of continuous cycles rotations), influence power coefficient Cp and lift coefficient Cl, reduced output power P at last, even wind wheel directly stops operating, and causes generating electricity when low wind speed.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of can be when low wind speed normal power generation and fan blade have the vertical axis aerogenerator of the best angle of attack all the time.
The present invention realizes like this, a kind of vertical axis aerogenerator, comprise that a vertical central axis and at least two axially are provided with and bending is spiral fan blade along described central shaft, the coaxial generator that is provided with on the described central shaft, be connected by crossbeam between described fan blade and the central shaft, described each fan blade is enclosed a plan view and is 360 ° of circular wind wheels.
Preferably, described fan blade is three.
Particularly, the Hand of spiral of described fan blade is left-handed or dextrorotation.
Particularly, the spiral angle of described fan blade is between 90 °～140 °.
Particularly, the pitch of described fan blade is 0.1 meter～100 meters.
Particularly, described fan blade adopts high strength, high rigidity, low density, long-life material to make.
Particularly, the deviation of weight of described each fan blade be no more than+/-50g.
Particularly, described fan blade cast molding, riveting molding, brake forming, founding moulding or adhesion-molded.
The present invention adopts the spirality fan blade to enclose the 360 ° wind wheels of a plan view for circle, guaranteed that wind wheel facings the wind for 360 °, thereby when making the wind wheel rotation, fan blade all has the best angle of attack all the time, be convenient to the startup of wind wheel when hanging down wind speed, avoided the possibility that stop operating of wind wheel under same condition, guaranteed that the generating function generates electricity when low wind speed, solved the change of the existing straight chip fan blade angle of attack that the wind wheel rotation causes when low wind speed and problem that the output power P that brings reduces and stops operating easily under low wind speed.
Description of drawings
Fig. 1 is the schematic representation of the vertical axis aerogenerator with straight sheet fan blade that provides of prior art;
Fig. 2 is the schematic representation of the straight sheet fan blade among Fig. 1;
Fig. 3 is the schematic representation of straight sheet fan blade when synchronization, diverse location among Fig. 1;
Fig. 4 is the cross section of the straight sheet fan blade among Fig. 1 and the graph of a relation between the airspeed;
Fig. 5 is the maximal wind-energy utilization factor Cp of the straight sheet fan blade among Fig. 1 and the graph of a relation between the angle of attack;
Fig. 6 is the lift coefficient Cl of the straight sheet fan blade among Fig. 1 and the graph of a relation between resistance coefficient Cd and the angle of attack;
Fig. 7 is the schematic perspective view of the vertical axis aerogenerator with spirality fan blade that provides of the embodiment of the invention;
Fig. 8 is the plan view of the vertical axis aerogenerator among Fig. 7;
Fig. 9 is the plan view of vertical axis aerogenerator among Fig. 7;
Figure 10 is the schematic representation of the spirality fan blade among Fig. 7.
Embodiment
In order to make purpose of the present invention, technological scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As Fig. 7～shown in Figure 10, the embodiment of the invention provides a kind of vertical axis aerogenerator, comprise that a vertical central axis 11 and at least two axially are provided with and bending is spiral fan blade 12 along central shaft 11, the coaxial generator 13 that is provided with on the central shaft 11, be connected by crossbeam 14 between fan blade 12 and the central shaft 11, each fan blade 12 is enclosed a plan view and is 360 ° of circular wind wheels.
Wherein, central shaft 11 is used for fixing the position of fan blade 12 and generator 13, constitutes rotating machinery; Fan blade 12 converts wind energy to the stator of generator 13 and the spinning movement between the rotor by rotating machinery; Generator 13 converts the rotation function between stator and the rotor to electric energy, thereby has realized wind energy is converted to the purpose of electric energy.
Different with existing vertical axis aerogenerator, vertical axis aerogenerator of the present invention adopts spiral fan blade 12, each fan blade 12 is enclosed 360 ° of complete wind wheels, guaranteed that wind wheel facings the wind for 360 °, thereby when making the wind wheel rotation, fan blade 12 all has best angle of attack all the time, be convenient to the startup of wind wheel when hanging down wind speed, avoided the possibility that stop operating of wind wheel under same condition, guaranteed that generator 13 can generate electricity when hanging down wind speed, solved existing straight chip fan blade wind wheel when hanging down wind speed and rotated the change of the angle of attack that causes and output power reduction that brings and the problem that under low wind speed, stops operating easily.
Preferably, in the present embodiment, vertical axis aerogenerator is equipped with three spirality fan blades 12.Be the effect that example illustrates spirality fan blade 12 with vertical axis aerogenerator below, but be not limited to the vertical axis aerogenerator of three spirality fan blades 12 with three spirality fan blades 12.
As seen from Figure 9, three spirality fan blades 12 of the present invention have been formed 360 ° of complete no gaps, complete closed wind wheel, that is to say, at any time, no matter wind from which direction comes, and by the wind wheel that spirality fan blade 12 is formed, the section that a fan blade 12 must be arranged is in best angle of attack position, thereby can guarantee wind-driven generator when low wind speed, output more electric energy and when hanging down wind speed, starting better.And the wind wheel that the fan blade of existing straight chip is formed, it is the wind wheel that can not form 360 ° complete closure, it is a gapped wind wheel all the time, this just means, when wind wheel rotates, behind the change of the wind, the angle of attack can change, and has caused the problem that output power is little even wind wheel stops operating when hanging down wind speed.
Below be the concrete technical requirements of the fan blade 12 of present embodiment:
(1) fan blade 12 surface treatments, corrosion-resistant, anti-getting rusty;
(2) arbitrary sectional shape of fan blade 12 is that any standard that is fit to do fan blade is wing, or for according to wing revise non-standard wing of standard;
(3) fan blade 12 tolerance of size are 5 grades of GBs;
(4) fan blade 12 surfaces can not be broken, and tangible distortion can not be arranged;
(5) material of fan blade 12: any high strength, high rigidity, low density, long-life material, such as glass fibre, carbon fiber, aluminum alloy, copper etc.;
(6) Hand of spiral of fan blade 12 is left-handed or dextrorotation;
(7) spiral angle of fan blade 12 is between 90 °～140 °;
(8) pitch of fan blade 12 is 0.1 meter～100 meters;
(9) deviation of weight of each fan blade 12 of each group in wind wheel be no more than+/-50g;
(10) fan blade 12 can not have to surpass 5 millimeters shake under 250 rev/mins rotating speed;
(11) fan blade 12 all connections go out can not the pine;
(12) the speed power curve feature of fan blade 12 meets designing requirement;
(13) method of the moulding of fan blade 12: (a) cast molding-casting machine+mould; (b) riveting molding-punch press+riveting press+mould; (c) brake forming-bender+mould; (d) founding moulding-mould; (e) adopt the glass fibre steel adhesion-molded.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. vertical axis aerogenerator, comprise a vertical central axis, the coaxial generator that is provided with on the described central shaft, it is characterized in that: comprise that also at least two is spiral fan blade along axial setting of described central shaft and bending, be connected by crossbeam between described fan blade and the central shaft, described each fan blade is enclosed a plan view and is 360 ° of circular wind wheels.
2. a kind of vertical axis aerogenerator as claimed in claim 1 is characterized in that: described fan blade is three.
3. a kind of vertical axis aerogenerator as claimed in claim 1 is characterized in that: the Hand of spiral of described fan blade is left-handed or dextrorotation.
4. a kind of vertical axis aerogenerator as claimed in claim 1 is characterized in that: the spiral angle of described fan blade is between 90 °～140 °.
5. a kind of vertical axis aerogenerator as claimed in claim 1 is characterized in that: the pitch of described fan blade is 0.1 meter～100 meters.
6. a kind of vertical axis aerogenerator as claimed in claim 1 is characterized in that: described fan blade adopts high strength, high rigidity, low density, long-life material to make.
7. a kind of vertical axis aerogenerator as claimed in claim 1 is characterized in that: the deviation of weight of described each fan blade is no more than+/-50g.
8. a kind of vertical axis aerogenerator as claimed in claim 1 is characterized in that: described fan blade cast molding, riveting molding, brake forming, founding moulding or adhesion-molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101499070A CN102251931A (en) | 2011-06-03 | 2011-06-03 | Vertical shaft wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101499070A CN102251931A (en) | 2011-06-03 | 2011-06-03 | Vertical shaft wind driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN102251931A true CN102251931A (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101499070A Pending CN102251931A (en) | 2011-06-03 | 2011-06-03 | Vertical shaft wind driven generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863792A (en) * | 2015-05-20 | 2015-08-26 | 上海交通大学 | Vertical axis wind turbine curved blades with twist angle |
| CN105817086A (en) * | 2016-05-23 | 2016-08-03 | 陈勇翔 | Multifunctional dust remover |
| CN106368896A (en) * | 2015-10-23 | 2017-02-01 | 田永胜 | Nautilus equiangular spiral wind wheel electric generator |
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| CN1826464A (en) * | 2003-07-24 | 2006-08-30 | 无噪音旋转有限公司 | Vertical-axis wind turbine |
| CN201110250Y (en) * | 2007-10-15 | 2008-09-03 | 张大鹏 | Flexible rotating vane wind-driven generator |
| CN101560949A (en) * | 2009-06-03 | 2009-10-21 | 南京航空航天大学 | Self-start vibration-free vertical axis wind turbine rotor |
| KR100942831B1 (en) * | 2009-06-23 | 2010-02-18 | 정자춘 | Wind power generating apparatus |
| CN201687652U (en) * | 2010-04-06 | 2010-12-29 | 常州市东君光能科技发展有限公司 | Lift-drag vertical-axis wind impeller |
| CN101943109A (en) * | 2009-07-03 | 2011-01-12 | 无锡爱尼达新能源科技有限公司 | Spiral blade for vertical axis wind generator |
| CN201865840U (en) * | 2009-09-18 | 2011-06-15 | 北京希翼新兴能源科技有限公司 | Impeller and windwheel of vertical shaft wind power generator |
| CN201884213U (en) * | 2010-12-17 | 2011-06-29 | 昆明理工峰潮科技有限公司 | Wind power generator with vertical shaft |
| CN202140253U (en) * | 2011-06-03 | 2012-02-08 | 易兵 | Wind power generator with vertical shaft |
-
2011
- 2011-06-03 CN CN2011101499070A patent/CN102251931A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1826464A (en) * | 2003-07-24 | 2006-08-30 | 无噪音旋转有限公司 | Vertical-axis wind turbine |
| CN201110250Y (en) * | 2007-10-15 | 2008-09-03 | 张大鹏 | Flexible rotating vane wind-driven generator |
| CN101560949A (en) * | 2009-06-03 | 2009-10-21 | 南京航空航天大学 | Self-start vibration-free vertical axis wind turbine rotor |
| KR100942831B1 (en) * | 2009-06-23 | 2010-02-18 | 정자춘 | Wind power generating apparatus |
| CN101943109A (en) * | 2009-07-03 | 2011-01-12 | 无锡爱尼达新能源科技有限公司 | Spiral blade for vertical axis wind generator |
| CN201865840U (en) * | 2009-09-18 | 2011-06-15 | 北京希翼新兴能源科技有限公司 | Impeller and windwheel of vertical shaft wind power generator |
| CN201687652U (en) * | 2010-04-06 | 2010-12-29 | 常州市东君光能科技发展有限公司 | Lift-drag vertical-axis wind impeller |
| CN201884213U (en) * | 2010-12-17 | 2011-06-29 | 昆明理工峰潮科技有限公司 | Wind power generator with vertical shaft |
| CN202140253U (en) * | 2011-06-03 | 2012-02-08 | 易兵 | Wind power generator with vertical shaft |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863792A (en) * | 2015-05-20 | 2015-08-26 | 上海交通大学 | Vertical axis wind turbine curved blades with twist angle |
| CN106368896A (en) * | 2015-10-23 | 2017-02-01 | 田永胜 | Nautilus equiangular spiral wind wheel electric generator |
| CN105817086A (en) * | 2016-05-23 | 2016-08-03 | 陈勇翔 | Multifunctional dust remover |
| CN105817086B (en) * | 2016-05-23 | 2018-03-20 | 浙江神风风电科技有限公司 | A kind of multi-function dust remover |
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Application publication date: 20111123 |