CN103032267A - Blade rotating speed controlling method and device by blade rotating centrifugal force for vertical axis windmill - Google Patents
Blade rotating speed controlling method and device by blade rotating centrifugal force for vertical axis windmill Download PDFInfo
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- CN103032267A CN103032267A CN201110295393XA CN201110295393A CN103032267A CN 103032267 A CN103032267 A CN 103032267A CN 201110295393X A CN201110295393X A CN 201110295393XA CN 201110295393 A CN201110295393 A CN 201110295393A CN 103032267 A CN103032267 A CN 103032267A
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- blade
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- end edge
- vertical axis
- centrifugal force
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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
Abstract
The invention discloses a blade rotating speed controlling method and a device by blade rotating centrifugal force for a vertical axis windmill. Method steps of the blade rotating centrifugal force blade rotating speed controlling method and the device comprise a blade structure molding step, a blade rotating step and a lifting force controlling step. The blade rotating centrifugal force blade rotating speed controlling method and the device is matched with a lifting force controlling device arranged on the front end edge and a blade of the vertical axis windmill. The lifting force controlling device comprises a pivot which is arranged on the front end edge of the blade in a pivot mode and parallel to a rotating shaft. One end of a lifting force controlling plate is fixed on the front end edge of the blade in a penetrating mode by the pivot, and the other end of the lifting force controlling plate extends towards the rear end edge of the blade. The blade is fixedly provided with elastic pressing pieces respectively at the two ends of the pivot, wherein the elastic pressing pieces extend towards the rear end edge of the blade. According to the blade rotating speed controlling method and the device, a lifting force principle is matched with the lifting force controlling device so that the centrifugal force of the windmill is larger than the elasticity pre-force acted by the elastic pieces to the lifting force controlling plate. The lifting force of the surface of the blade is changed by rotation of the lifting force controlling plate in the pivot mode so as to achieve a purpose of windmill rotating speed braking.
Description
Technical field
The present invention is relevant with the square law device of control vertical axis windmill blade rotational speed, refers to especially utilize the rotary centrifugal force of blade, the blade surface negative lift that is provided with lift unit is increased, method and the device of control blade rotational speed.
Background technique
Wind-power electricity generation is present one of common and alternative energy source of being taken seriously, and therefore in the technical development of wind power generating set, existing many known technologies are disclosed exposure; Although existing wind-driven generator can provide suitable operational effectiveness, but when actual operation, but there is the too fast problem of rotating shaft rotating speed in wind-driven generator, not only causes easily the damage of wind-driven generator, severe patient even may cause the situations such as wind-driven generator disintegration.
In order to improve the problems referred to above, there is the dealer directly on wind power generating set, to be provided with in addition braking device, and the structure of braking device must keep the state that brakes often, and loss is very serious and normal the need changed, and can't brake and rotating speed is too fast and then undermine wind power generating set otherwise very easily cause.Therefore there is the dealer to propose US Patent No. 4,082,479 provide a kind of hypervelocity spoiler (overspeed spoilers for vertical axis wind turbine) of vertical axis windmill, please cooperate and consult Fig. 1 a, 1b, this vertical axis windmill has a plurality of blades 10, each blade 10 is respectively one along the both side edges on its long limit and meets front-end edge 101 and the following current that windward slope is obtuse and be pointed end edge 102, defining this blade 10 is a directions X along its front-end edge 101 to the direction of ora terminalis 102 thereafter, this spoiler 11 is hubbed at a plurality of blades 10 end edges 102 of vertical axis windmill, spoiler 11 mainly comprises a pin-joint part 111 that is pivoted with blade 10 end edges 102, and spoiler 11 111 extends to form a centrifugal film 112 and the catch 113 with angle from the pin-joint part.
By being located at the balancing weight 114 of catch 113 ends among Fig. 1 a, or these centrifugal film 112 corresponding blade 10 front-end edges 101 curved lamellar bodies among Fig. 1 b, make windmill shaft under the normality rotating speed, the centrifugal film 112 of this spoiler 11 is affixed by blade 10 surfaces, and catch 113 then extends along directions X; When windmill shaft is overrun, this spoiler 11 is centrifugalization and the skew that pivots, form centrifugal film 112 and depart from blade 10 surfaces, and catch 113 and directions X generally be vertical resistance block face structure, use the purpose that increases the rotating shaft rotational resistance and reach reduction rotating shaft rotating speed.
Yet, known patent is under the actual state of overrunning, because blade 10 constantly changes its centrifugal force direction with the rotating shaft rotation, cause spoiler 11 continuous position that concerns that pivots skew and centrifugal film 112 in catch 113 block moderating processes to change always, and there is no too many restrictive change, not only cause accelerating spoiler 11 fatigues of materials, the efficient of block can't be determined, and the effect of reduction of speed is limited.In addition, when spoiler 11 antagonism rotating shaft rotating speeds and centrifugal force, its maximum weighted moment drops on the pivot-connecting position with blade 10, but this pivot-connecting position is positioned at blade 10 ora terminalis, add that previous materials is tired, and the angle that catch 113 and centrifugal film 112 pivot is approximately all about 90 degree, it is excessive that the friction of this pivot-connecting position produces scope, so that known patent exists structural strength not enough, and the problem of anti-stress condition extreme difference, so still be difficult to reach the purpose of effective reduction vertical axis windmill rotating speed.
Summary of the invention
The technical problem to be solved in the present invention provides method and the device of a kind of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed, can automatically adjust, Passive Control, and sturdy and durable.
For solving the problems of the technologies described above, the invention provides a kind of method of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed, described vertical axis windmill has a rotating shaft and blade a plurality of and this rotating shaft winding, each blade has a front-end edge and an end edge, and the method step comprises (a) blade structure forming step, (b) blade rotary step, (c) lift control step.
In the blade structure forming step, described blade is provided with a lift control device, described lift control device comprises a pivot, the front-end edge place of these pivot two ends and blade parallel shaft is pivoted, one lift control plate has the free end that a pivot end that is worn by pivot and extends towards the blade end edge, two elastic pressuring plates are located at described pivot two ends, this elastic pressuring plate has a fixing part and is fixed in blade front-end edge place, and a pressing part extends and suppresses on described lift control plate towards the blade end edge;
In the blade rotary step, make described vertical axis windmill rotation and each blade produce a centrifugal force; Described elastic pressuring plate compacting lift control plate free end, produce the pre-power of an elasticity make the lift control plate to blade surface by subsides;
In the lift control step, rotating shaft faster rotational speed when described vertical axis windmill, and blade centrifugal force is during greater than the pre-power of elasticity of two elastic pressuring plates, described lift control plate rotates centered by pivot and its free end leaves blade surface, change the lift of blade surface and destroy the rotator inertia of described vertical axis windmill blade, reduce the rotating shaft rotating speed of described vertical axis windmill.
The present invention also provides a kind of device of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed, described vertical axis windmill has a plurality of blades, each blade has a front-end edge, and be provided with a lift control device at its front-end edge place, described lift control device comprise one be hubbed at the blade front-end edge and with the pivot of shaft parallel, one lift control plate has a pivot end that is worn and be fixed in the blade front-end edge by pivot, an and free end that extends towards the blade end edge, and this blade respectively is provided with an elastic pressuring plate at the pivot two ends, each elastic pressuring plate have one with the fixing fixing part in blade front-end edge place, an and pressing part that extends towards the blade end edge.
The present invention mainly utilizes the lift principle to be engaged in blade front-end edge parallel shaft place and the lift control device is set with the control blade rotational speed, this lift control device is hubbed at the blade front-end edge by pivot with the lift control plate, and set firmly elastic pressuring plate at pivot two ends places, this elastic pressuring plate is suppressed on the lift control plate and is imposed the pre-power of an elasticity, vertical axis windmill rotates and each blade has a centrifugal force, when centrifugal force during greater than the pre-power of elasticity, the lift control plate rotates centered by pivot and its free end leaves this blade surface, change the lift of blade surface, and then reduce the rotating shaft rotating speed of vertical axis windmill.
Description of drawings
The present invention is further detailed explanation below in conjunction with accompanying drawing and embodiment:
Fig. 1 a is the structure cross-sectional schematic that known lift control device is located at vertical axis windmill blade rear end;
Fig. 1 b is the structure cross-sectional schematic that known lift control device is located at vertical axis windmill blade front end;
Fig. 2 is the surface structure schematic representation that lift control device of the present invention is located at the circular arc air vane;
Fig. 3 is the structure for amplifying schematic representation of Fig. 2 lift control device;
Fig. 4 is the structure cross-sectional schematic of 4-4 hatching line among Fig. 3;
Fig. 5 is the structure cross-sectional schematic of 5-5 hatching line among Fig. 3;
Fig. 6 is the structure cross-sectional schematic that lift control device of the present invention is risen by blade rotary centrifugal force to leave blade surface;
Fig. 7 is the surface structure schematic representation that lift control device of the present invention is located at upright shape air vane;
Fig. 8 a is the present invention is affixed by blade surface in the lift control plate aerofoil profile schematic representation;
Fig. 8 b is the present invention leaves about 5 degree of blade surface in the lift control plate aerofoil profile schematic representation;
Fig. 8 c is the present invention leaves about 10 degree of blade surface in the lift control plate aerofoil profile schematic representation;
Fig. 8 d is the present invention leaves about 15 degree of blade surface in the lift control plate aerofoil profile schematic representation;
Fig. 9 a is the lift coefficient (Cl) of blade structure of the present invention and the datagram of angle of attack angle (α);
Fig. 9 b is the resistance coefficient (Cd) of blade structure of the present invention and the datagram of angle of attack angle (α);
Fig. 9 c is the datagram of torsional moment and the azimythal angle angle of blade structure of the present invention.
Wherein description of reference numerals is as follows:
Pin-joint part 111 centrifugal films 112
Catch 113 balancing weights 114
Directions X
Fixing part 331 pressing parts 332
The pre-power F of elasticity
pCentrifugal force F
i
Embodiment
At first, please cooperate Fig. 4 with Fig. 3, Fig. 5 sees it, the preferred embodiment of the device of a kind of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed provided by the present invention, mainly be that a vertical axis windmill 20 has a rotating shaft 21 and blade 22 a plurality of and rotating shaft 21 windings, each blade 22 has a front-end edge 221 and the aerofoil profile that aerofoil profile is obtuse and is a pointed end edge 222 along the both sides on its long limit, each blade 22 is provided with a lift control device 30 at its front-end edge 221 places, and this lift control device 30 comprises a pivot 31, one lift control plate 32 and two elastic pressuring plates 33.
In the present embodiment, the front-end edge 221 of each blade 22 respectively is provided with a locking hole 224 at place, pivot 31 two ends, makes two locks tie parts 333 and wears respectively the fixing part 331 of two elastic pressuring plates 33 and tie fixing with these two locking holes, 224 locks.
As shown in Figure 5, rotating shaft 21 drives a plurality of blade 22 turns, has less than the pre-power F of elasticity after each blade 22 beginning turn
pA centrifugal force F
iAs blade 22 centrifugal force F
iGreater than the pre-power F of the elasticity of elastic pressuring plate 33
pAs shown in Figure 6, lift control plate 32 rotates centered by pivot 31 and its free end 322 leaves blade 22 surfaces, and the aerofoil profile of change blade 22, the lift on blade 22 surfaces and blade 22 rotator inertias of vertical axis windmill 20 are changed thereupon, and reduce rotating shaft 21 rotating speeds of this vertical axis windmill 20.
In addition, please cooperate and consult Fig. 2, shown in Figure 7, the device of a kind of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed provided by the present invention, the blade 22 of this vertical axis windmill 20 is Da Lishi (Darrieus) air vane, this blade 22 is circular arc type (type of beating eggs) Da Lishi air vane as shown in Figure 2, or erect type as shown in Figure 7 (H type) Da Lishi air vane; And this lift control device 30 is located at Da Lishi air vane front-end edge 221 with its pivot 31 parallel vertical axle windmills 20 rotating shafts 21 ground.
The above is embodiment of the invention main member and configuration explanation thereof, as for blade rotational speed control mode and the effect thereof of preferred embodiment of the present invention, does following explanation.
The method of blade for vertical shaft windmill rotary centrifugal force of the present invention control blade rotational speed, it mainly has the blade 22 of vertical axis windmill 20 and rotating shaft 21 thereof, a plurality of and these rotating shaft 21 windings, and each blade 22 has a front-end edge 221 and an end edge 222; Wherein the method step comprises:
(a) blade structure forming step: this blade 22 is provided with lift control device 30, this lift control device 30 comprises pivot 31, front-end edge 221 places of pivot 31 two ends and blade 22 parallel shafts 21 are pivoted, this lift control plate 32 has the pivot end 321 that is worn by pivot 31 and the free end 322 that extends towards blade 22 end edges 222, this two elastic pressuring plate 33 is located at pivot 31 two ends, the fixing part 331 of this elastic pressuring plate 33 is fixed in blade 22 front-end edges 221 places, and pressing part 332 extends and suppresses on lift control plate 32 towards blade 22 end edges 222;
(b) blade rotary step: make the rotating shaft 21 of vertical axis windmill 20 drive a plurality of blade 22 turns, each blade 22 produces a centrifugal force F
i Elastic pressuring plate 33 compacting lift control plates 32 free ends 322 produce the pre-power Fp of an elasticity and make lift control plate 32 surperficial by pasting to blade 22;
(c) lift control step: when rotating shaft 21 faster rotational speed of vertical axis windmill 20, and blade 22 centrifugal force F
iGreater than the pre-power F of the elasticity of two elastic pressuring plates 33
pThe time, this lift control plate 32 rotates centered by pivot 31 and its free end 322 leaves blade 22 surfaces, with the lift that changes blade 22 surfaces and blade 22 rotator inertias that destroy vertical axis windmill 20, and then reduces rotating shaft 21 rotating speeds of this vertical axis windmill 20.
Please cooperate and consult shown in Fig. 8 a to Fig. 8 d, above-mentioned blade rotational speed controlling method is to utilize the former power of lift to be engaged in each blade 22 front-end edges 221 parallel shafts 21 place lift control device 30 is set, and makes this vertical axis windmill 20 have aerofoil profile (take NACA0015 blade airfoil section as example) shown in Fig. 8 a under the normality rotating speed; And when vertical axis windmill 20 rotating speeds are overrun, impose on the centrifugal force F of lift control plate 32
iAlso increase simultaneously, thereby produce greater than the pre-power F of the elasticity of elastic pressuring plate 33
pCentrifugal force F
i, make this lift control plate 32 support to arrive in elastic pressuring plate 33 and leave blade 22 surfaces, be respectively 5,10 and 15 degree and namely form different wing simulated section such as Fig. 8 b, Fig. 8 c or Fig. 8 d when this lift control plate 32 leaves angle that blade 22 forms by the pivot-connecting position.
At this moment, the lift on blade 22 surfaces and resistance namely are able to its surface configuration of mat and change and change, shown in Fig. 9 a, Fig. 9 b, the lift coefficient of blade 22 (Cl), resistance coefficient (Cd) and the angle of attack (α) relation are respectively because the aerofoil profile of blade 22 changes (negative lift increase and resistance shade).Shown in Fig. 9 c, each blade 22 lift and resistance are at the negative lift square of making a concerted effort to produce of rolling tangential direction, by this, this negative lift square is overcome blade 22 aerofoil profiles existing positive lift force rectangle under original state and is become the aerodynamic braking action, when being about concerning of 15 degree with the lift control plate 32 shown in Fig. 8 d and blade 22 angles, the figure of the negative lift square that produces is the curve of below of Fig. 9 c, its maximum negative lift square is about negative 350 Newton meters, moment values about negative approximately 200 Newton meters of the curve of integrated curved and general state, can make these vertical axis windmill 20 rotating shafts 21 be decelerated to lift control plate 32 opening angles and be the rotating speed of certain fixed value, then negative lift square and positive lift force square are offseted, make this vertical axis windmill 20 rotate with fixed rotating speed, reach and effectively overcome the safety problem that windmill is overrun and rotated, Fig. 9 b illustrates that then corner dimension and the windage of 22 in lift control plate 32 and blade there is no too much influence, the size of foundation this lifting moment of change of the present invention can be controlled the rotating speed of this vertical axis windmill 20, need not the purpose that excessive brake can be reached deceleration.
Claims (7)
1. the method for blade for vertical shaft windmill rotary centrifugal force control blade rotational speed, described vertical axis windmill has a rotating shaft and blade a plurality of and this rotating shaft winding, and each blade has a front-end edge and an end edge, it is characterized in that, and described method step comprises:
(a) blade structure forming step: described blade is provided with a lift control device, described lift control device comprises a pivot, the front-end edge place of these pivot two ends and blade parallel shaft is pivoted, one lift control plate has the free end that a pivot end that is worn by pivot and extends towards the blade end edge, two elastic pressuring plates are located at described pivot two ends, this elastic pressuring plate has a fixing part and is fixed in blade front-end edge place, and a pressing part extends and suppresses on described lift control plate towards the blade end edge;
(b) blade rotary step: make described vertical axis windmill rotation and each blade produce a centrifugal force; Described elastic pressuring plate compacting lift control plate free end, produce the pre-power of an elasticity make the lift control plate to blade surface by subsides;
(c) lift control step: when the rotating shaft faster rotational speed of described vertical axis windmill, and blade centrifugal force is during greater than the pre-power of elasticity of two elastic pressuring plates, described lift control plate rotates centered by pivot and its free end leaves blade surface, change the lift of blade surface and destroy the rotator inertia of described vertical axis windmill blade, reduce the rotating shaft rotating speed of described vertical axis windmill.
2. the device of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed, described vertical axis windmill has a rotating shaft and blade a plurality of and this rotating shaft winding, each blade has a front-end edge and an end edge, each blade is provided with a lift control device at its front-end edge place, it is characterized in that described lift control device comprises:
One pivot is hubbed at blade front-end edge place also and shaft parallel;
One lift control plate is located at blade surface, and described lift control plate has a pivot end that is worn and be fixed in the blade front-end edge by pivot, and a free end that extends towards the blade end edge;
Two elastic pressuring plates, be located at respectively place, pivot two ends, each elastic pressuring plate has a fixing part that is fixed in blade front-end edge place, and a pressing part that extends towards the blade end edge, and described two elastic pressuring plates have an elasticity and defeat in advance the free end that is formed on the lift control plate;
Described vertical axis windmill rotates, and each blade has a centrifugal force, when described blade centrifugal force greater than the pre-power of the elasticity of elastic pressuring plate, described lift control plate rotates centered by pivot and its free end leaves blade surface, the rotator inertia of the lift of described blade surface and vertical axis windmill blade is changed, and the rotating shaft rotating speed of vertical axis windmill is lowered.
3. the device of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed as claimed in claim 2 is characterized in that described vertical axis windmill blade is the Da Lishi air vane.
4. the device of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed as claimed in claim 3 is characterized in that described vertical axis windmill blade is erect type Da Lishi air vane.
5. the device of blade for vertical shaft windmill rotary centrifugal force control blade rotational speed as claimed in claim 3 is characterized in that described vertical axis windmill blade is circular arc type Da Lishi air vane.
6. blade for vertical shaft windmill rotary centrifugal force as claimed in claim 2 is controlled the device of blade rotational speed, it is characterized in that, each blade offers a socket at the front-end edge place of parallel shaft, and described pivot is placed in this socket and its two ends and socket both sides set firmly; The pivot end of described lift control plate is configured as tube-in-tube structure and is sheathed on pivotally described pivot outside.
7. blade for vertical shaft windmill rotary centrifugal force as claimed in claim 2 is controlled the device of blade rotational speed, it is characterized in that, the front-end edge of each blade respectively is provided with a locking hole at place, pivot two ends, and two lock knot parts wear respectively the fixing part of described two elastic pressuring plates and tie with this two locking holes lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110295393XA CN103032267A (en) | 2011-09-30 | 2011-09-30 | Blade rotating speed controlling method and device by blade rotating centrifugal force for vertical axis windmill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110295393XA CN103032267A (en) | 2011-09-30 | 2011-09-30 | Blade rotating speed controlling method and device by blade rotating centrifugal force for vertical axis windmill |
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|---|---|
| CN103032267A true CN103032267A (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110295393XA Pending CN103032267A (en) | 2011-09-30 | 2011-09-30 | Blade rotating speed controlling method and device by blade rotating centrifugal force for vertical axis windmill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485976A (en) * | 2013-09-10 | 2014-01-01 | 深圳市风发科技发展有限公司 | Wind turbine and wind turbine vane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082479A (en) * | 1975-09-25 | 1978-04-04 | Canadian Patents And Development Limited | Overspeed spoilers for vertical axis wind turbine |
| JP2006258083A (en) * | 2005-03-14 | 2006-09-28 | Socio Recur:Kk | Startability improvement and countermeasure against strong wind for linear blade vertical shaft windmill |
| CN200989282Y (en) * | 2006-11-23 | 2007-12-12 | 新高能源科技股份有限公司 | Vertical axle compound windmill |
| CN101137843A (en) * | 2005-03-07 | 2008-03-05 | 株式会社Ipb | Blade for vertical shaft windmill and lift type vertical shaft windmill having the same |
| CN101622448A (en) * | 2007-02-20 | 2010-01-06 | 野口常夫 | Vertical shaft windmill |
| CN201687653U (en) * | 2010-04-20 | 2010-12-29 | 王永彰 | Vertical axis type air operated machine blade with spoiler |
| JP2011027054A (en) * | 2009-07-28 | 2011-02-10 | Global Energy Co Ltd | Blade of wind turbine |
-
2011
- 2011-09-30 CN CN201110295393XA patent/CN103032267A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082479A (en) * | 1975-09-25 | 1978-04-04 | Canadian Patents And Development Limited | Overspeed spoilers for vertical axis wind turbine |
| CN101137843A (en) * | 2005-03-07 | 2008-03-05 | 株式会社Ipb | Blade for vertical shaft windmill and lift type vertical shaft windmill having the same |
| JP2006258083A (en) * | 2005-03-14 | 2006-09-28 | Socio Recur:Kk | Startability improvement and countermeasure against strong wind for linear blade vertical shaft windmill |
| CN200989282Y (en) * | 2006-11-23 | 2007-12-12 | 新高能源科技股份有限公司 | Vertical axle compound windmill |
| CN101622448A (en) * | 2007-02-20 | 2010-01-06 | 野口常夫 | Vertical shaft windmill |
| JP2011027054A (en) * | 2009-07-28 | 2011-02-10 | Global Energy Co Ltd | Blade of wind turbine |
| CN201687653U (en) * | 2010-04-20 | 2010-12-29 | 王永彰 | Vertical axis type air operated machine blade with spoiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485976A (en) * | 2013-09-10 | 2014-01-01 | 深圳市风发科技发展有限公司 | Wind turbine and wind turbine vane |
| CN103485976B (en) * | 2013-09-10 | 2016-09-28 | 深圳市风发科技发展有限公司 | Wind energy conversion system and pneumatic equipment blades |
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Application publication date: 20130410 |