CN112796931B - Wind power turbulence structure - Google Patents
Wind power turbulence structure Download PDFInfo
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- CN112796931B CN112796931B CN202011611766.5A CN202011611766A CN112796931B CN 112796931 B CN112796931 B CN 112796931B CN 202011611766 A CN202011611766 A CN 202011611766A CN 112796931 B CN112796931 B CN 112796931B
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000009423 ventilation Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 230000001502 supplementing effect Effects 0.000 abstract description 10
- 238000010248 power generation Methods 0.000 abstract description 5
- 230000004323 axial length Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The invention belongs to the technical field of wind power generation, and particularly relates to a wind turbulence structure on a wind power generation fan blade. The wind power turbulence structure is arranged at the outer side end part of the fan blade, and the fan blade steel plate framework extends and is inserted into the wind power turbulence structure; the wind power turbulence structure comprises a wind power turbulence structure body and a lightning receptor arranged at the tip end of the wind power turbulence structure body, and the lightning receptor is in conductive connection with the blade steel plate skeleton; the wind power turbulence structure body is of a dorsal fin structure, the windward side surface is of a conical edge structure, and ribs and grooves which are mutually spaced and consistent with the transverse inclination radian of the fan blade are symmetrically arranged on the two sides of the wind power turbulence structure body; the side of wind-force vortex structure body is provided with the ventilation hole that transversely runs through wind-force vortex structure body. The wind power turbulence structure solves the technical problems that the conventional wind power turbulence structure cannot increase the air supplementing quantity under the condition of too small wind power and increase the wind resistance under the condition of too large wind power, and the fan blades are effectively prevented from being damaged due to too fast rotation.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a wind turbulence structure on a wind power generation fan blade.
Background
The blades of a wind power generator set are key components of wind power equipment for converting wind energy into mechanical energy, and the manufacturing cost of the blades is about 15% to 30% of the total cost of the wind power generator set. The blades generally present a unique airfoil shape based on aerodynamic profile design, and the larger the lift-drag ratio of the blades of the airfoil shape is, the more wind capturing efficiency of the fan can be improved, and further the output power of the fan is improved. However, when the wind capturing efficiency of the blade is improved, if the wind force is too large, the rotating speed of the fan is too high, and the damage to equipment is large by starting the brake auxiliary system, so that a wind force turbulence structure which can better supplement wind force under the condition of low wind force and can timely increase wind resistance when the wind force is too large is needed.
Disclosure of Invention
The invention provides a wind turbulence structure on a wind power generation fan blade, which solves the technical problems that the conventional wind turbulence structure cannot increase the air supplementing quantity under the condition of too small wind power and increase the wind resistance under the condition of too large wind power, and effectively prevents the fan blade from being damaged due to too fast rotation.
In order to achieve the above purpose, the present invention provides a wind turbulence structure, wherein the wind turbulence structure is arranged at the outer end of a fan blade, and a fan blade steel plate skeleton extends and is inserted into the wind turbulence structure; the wind power turbulence structure comprises a wind power turbulence structure body and a lightning receptor arranged at the tip end of the wind power turbulence structure body, and the lightning receptor is in conductive connection with the fan blade steel plate framework; the wind power turbulence structure body is of a dorsal fin structure, the windward side surface is of a conical edge structure, and ribs and grooves which are mutually spaced and consistent with the transverse inclination radian of the fan blade are symmetrically arranged on the two sides of the wind power turbulence structure body; the depth of the convex rib and the groove is one fifth of the thickness of the wind turbulence structure; the side face of the wind power turbulence structure body is provided with a vent hole which transversely penetrates through the wind power turbulence structure body, a sliding sleeve is inserted into the vent hole, the sliding sleeve is of a hollow tubular structure, the outer side end of the sliding sleeve is sealed, at least 2 opening gaps are formed in the side wall of the sliding sleeve along the length direction of the sliding sleeve, the inner end of the sliding sleeve is provided with an outwards-protruding limiting boss, 2 inwards-protruding limiting blocks are arranged in the vent hole, and the limiting boss is clamped between the 2 limiting blocks; the outer side of the sliding sleeve between the 2 limiting blocks is sleeved with a spring; under the condition that the sliding sleeve is not subjected to external force, the outer end head of the sliding sleeve is parallel to the plane of the air outlet of the vent hole.
Further, set up at least a set of fin that outwards protrudes on the lateral wall that the sliding sleeve is close to ventilation hole air outlet one side, set up the draw-in groove on the lateral wall in ventilation hole, the fin can slide along the draw-in groove under the exogenic action, and the fin is blocked into the draw-in groove under the effect of spring when not receiving the exogenic action.
Further, the cross sections of the grooves and the ribs are arc curves, triangles or trapezoids.
Further, the number of the opening gaps is 4.
Further, the opening slits and the tail fin are arranged in 4 alternately.
Further, the tail fin is obliquely arranged in a spiral shape along the axial direction of the vent hole, and the axial length of the tail fin along the vent hole is smaller than the compressible length of the spring.
Further, the wind turbulence structure body gradually reduces from top to bottom.
Further, the thickness of the wind turbulence structure body is gradually reduced from the windward side to the leeward side.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the wind supplementing capability can be increased to increase the rotating speed of the fan blade under the condition of small wind power, and the wind supplementing capability is reduced and the wind resistance is increased through the movement of the sliding sleeve under the condition of overlarge wind power; wind resistance is further increased through the protruding tail fin, and damage to the fan blades caused by too high rotating speed of the fan blades under the condition of too large wind force is effectively prevented.
Drawings
FIG. 1 is a view showing a state of use of the wind turbulence structure according to the present invention.
FIG. 2 is a schematic structural view of a wind turbulence structure according to the present invention.
FIG. 3 is a vertical cut cross-sectional view of a vent hole of the wind turbulence structure of the present invention when the wind is small.
FIG. 4 is a vertical cut cross-sectional view of a vent hole of the wind turbulence structure of the present invention when the wind is large.
Reference numerals illustrate: 1. a fan blade; 2. a fan blade steel plate framework; 3. a wind turbulence structure body; 3.1, convex edges; 3.2, grooves; 3.3, a pyramid structure; 3.4, ventilation holes; 3.4.1, a clamping groove; 3.4.2, a limiting block; 3.4.3, springs; 3.5, sliding sleeve; 3.5.1, empennage; 3.5.2, opening gaps; 3.5.3, limit boss; 4. a lightning receptor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first and second and the like in the description and in the claims of embodiments of the invention, are used for distinguishing between different objects and not necessarily for describing a particular sequential order of objects. For example, the first parameter set and the second parameter set, etc., are used to distinguish between different parameter sets, and are not used to describe a particular order of parameter sets.
In the description of the embodiments of the present invention, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, a plurality of elements refers to two elements or more than two elements.
The term "and/or" herein is an association relationship describing an associated object, and means that there may be three relationships, for example, a display panel and/or a backlight, and may mean: there are three cases where the display panel alone exists, the display panel and the backlight exist at the same time, and the backlight exists alone. The symbol "/" herein indicates that the associated object is or is a relationship, e.g., input/output indicates input or output.
In embodiments of the invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
The invention provides a wind power turbulence structure, which is arranged to increase the wind supplementing capability of a fan blade when the wind power is small; and when the wind power is too large, the wind resistance of the fan blade can be effectively increased to reduce the rotation speed, so that the fan blade can be better protected, and the technical problems that the rotating speed of the fan blade is too low when the wind power is too small and the rotating speed is too high when the wind speed is too large and is easy to damage are effectively solved.
1, as shown in fig. 1 to 4, the wind turbulence structure is integrally connected to the outer end of the fan blade 1, and the fan blade steel plate skeleton 2 extends and is inserted into the wind turbulence structure, so that on one hand, the wind turbulence structure is supported, and on the other hand, the wind turbulence structure is convenient to connect with the lightning receptor, and a lightning protection effect is achieved; the wind power turbulence structure comprises a wind power turbulence structure body 3 and a lightning receptor 4 fixedly arranged at the tip end of the wind power turbulence structure body 3, wherein the lightning receptor is in conductive connection with a fan blade steel plate framework, and the fan blade steel plate framework 2 is grounded through a lead; the wind power turbulence structure body 3 is of a dorsal fin structure, namely a dorsal fin similar to a fish, the upper end is small, the bottom is large, the windward side is of a conical edge structure 3.3, namely a transition from small to large is formed on the windward side, ribs 3.1 and grooves 3.2 which are mutually spaced and consistent with the transverse inclination radian of the fan blade are symmetrically arranged on two sides of the wind power turbulence structure body 3, and the wind power turbulence structure body 3 forms turbulence on the surfaces of the ribs 3.1 and the grooves 3.2 which are arranged between the wind direction after receiving wind power, so that the wind supplementing area is increased, and the rotation speed of the fan blade 1 is improved under the condition of small wind power; the depths of the convex edges 3.1 and the grooves 3.2 are one fifth of the thickness of the wind turbulence structure, so that the stability of the wind turbulence structure body 3 is ensured while the wind supplementing capability is improved; the side of the wind power turbulence structure body 3 is provided with a vent hole 3.4 which transversely penetrates through the wind power turbulence structure body 3, namely a convex edge 3.1 of the wind power turbulence structure body 3 of the vent hole 3.4 penetrates through the length direction of a groove 3.2, a sliding sleeve 3.5 is inserted into the vent hole 3.4, the sliding sleeve 3.5 is of a hollow tubular structure, one end of the outer side is sealed in the leeward direction, 2 opening gaps 3.5.2 are symmetrically arranged on the side wall of the sliding sleeve 3.5 along the length direction of the sliding sleeve 3.5, an outer protruding limit boss 3.5.3 is arranged at the inner end of the sliding sleeve 3.5 and used for forming a certain limit when the sliding sleeve 3.5 slides in the vent hole 3.4, 2 inwards protruding limit blocks 3.4.2 are arranged in the vent hole 3.4, and the limit boss 3.5.3 is clamped between the 2 limit blocks 3.4.2; the outer side of the sliding sleeve 3.5 between the 2 limiting blocks 3.4.2 is sleeved with a spring 3.4.3; under the condition that the sliding sleeve 3.5 is not subjected to external force, the outer end head of the sliding sleeve 3.5 is parallel to the air outlet plane of the vent hole 3.4. When the fan blade rotates too fast, wind enters from the air inlet of the ventilation hole 3.4, blows the sliding sleeve 3.5 to move outwards, the wind force is larger and is larger than the spring force, the sliding sleeve 3.5 moves outwards to be protruding, the wind force passes through the opening gap 3.5.2 on the sliding sleeve 3.5, the more the sliding sleeve 3.5 protrudes, the more the opening gap 3.5.2 is exposed, the worse air supplementing effect is caused, the larger the resistance is, and the rotating speed of the fan blade 1 is reduced under the condition that the wind resistance is gradually increased, so that the technical problem that the rotating speed of the fan blade 1 is too high and easy to damage when the wind force is too large is solved. The wind resistance effect on the fan blade 1 under the condition of strong wind is higher, and the equipment damage rate is reduced.
For example, in order to further increase the wind resistance and reduce the rotating speed of the fan blade 1 under the condition of overlarge wind power, at least one group of tail fins 3.5.1 protruding outwards are arranged on the side wall of the sliding sleeve 3.5, which is close to the air outlet of the vent hole 3.4, on the side wall of the vent hole 3.4, corresponding to the tail fins 3.5.1, clamping grooves 3.4.1 are arranged, the tail fins 3.5.1 can slide left and right along the clamping grooves 3.4.1 under the action of external force, and when the external force is not applied, the tail fins 3.5.1 are clamped into the clamping grooves 3.4.1 under the action of the springs 3.4.3. The larger the wind power is, the larger the exposed area is, and the larger the wind resistance is, so that the limitation on the rotation speed of the fan blade 1 is larger.
Illustratively, the cross sections of the grooves 3.2 and the ribs 3.1 are arc-shaped curves, triangles or trapezoids. The cross sections of the grooves 3.2 and the ribs 3.1 are preferably arc-shaped curves.
Illustratively, the number of open slots is 4.
Preferably, the opening slits 3.5.2 and the tail 3.5.1 are arranged in 4 alternating ways.
Illustratively, the flight 3.5.1 is inclined in a reverse helical manner along the axis of the vent hole 3.4, i.e. inclined at an angle, preferably 5 ° with respect to the vent hole 3.4, the axial length of the flight 3.5.1 along the vent hole 3.4 being less than the compressible length of the spring 3.4.3. When the wind power reaches a certain degree, the tail wing 3.5.1 is completely separated from the clamping groove 3.4.1 of the vent hole 3.4, so that the rotation can be realized under the action of the wind power, and the wind resistance is further increased.
Illustratively, a bearing (not shown in the figure) is disposed between the stopper 3.4.2 near the leeward side and the sliding sleeve 3.5, a clamping groove (not shown in the figure) is disposed on an end face of an inner side end of the bearing, a clamping rib (not shown in the figure) which can be inserted into the clamping groove and corresponds to the clamping groove is disposed on the outer side of the sliding sleeve 3.5 near one side of the limiting boss 3.5.3, and the sliding sleeve 3.5 is used for rotating the tail 3.5.1 under the action of wind force after the tail 3.5.1 is separated from the clamping groove 3.4.1 under the condition of overlarge wind force, so that the clamping rib on the sliding sleeve 3.5 is clamped into the clamping groove, and the sliding sleeve 3.5 can rotate under the action of the bearing.
Illustratively, the wind-turbulence structure body 3 gradually decreases in thickness from top to bottom.
Illustratively, the wind-turbulence structure body 3 gradually decreases in thickness from the windward side to the leeward side.
Working principle and working process: in the working process, under the condition of small wind force, the wind supplementing capability is effectively improved under the action of the shape of the dorsal fin of the wind turbulence structure body 3, at the moment, the force born by the sliding sleeve 3.5 in the wind turbulence structure body 3 is small, the sliding sleeve 3.5 does not move relative to the vent hole 3.4, after the wind force reaches a certain degree, the force exerted on the sliding sleeve 3.5 is larger and larger after the wind enters the vent hole 3.4, when the force is larger than the limit of the spring 3.4.3 on the sliding sleeve 3.5, the sliding sleeve 3.5 starts to protrude, meanwhile, the opening gap 3.5.2 is exposed, the vent hole 3.4 and the opening gap 3.5.2 are conducted, so that the wind supplementing area is small to a certain degree, and the rotating speed of the fan blade 1 is reduced; meanwhile, the tail wing 3.5.1 arranged on the side surface of the sliding sleeve 3.5 also protrudes, so that the wind resistance is further increased. After wind power continues to increase, sliding sleeve 3.5 further removes, spring 3.4.3 further compresses, sliding sleeve 3.5 and fin 3.5.1 further increase, opening gap 3.5.2 further increases simultaneously until fin 3.5.1 breaks away from in draw-in groove 3.4.1, thereby rotate fin 3.5.1 under the effect of wind power, realize the two block in the joint recess of bearing terminal surface is gone into to the joint bead card on the sliding sleeve 3.5 simultaneously, screw-thread fin 3.5.1 accelerates the rotation under the effect of wind power and bearing, form certain reverse vortex, when the windage area further increases, further increase windage effect through the reverse vortex that forms, more effectual effect that reduces fan blade 1 rotational speed. Meanwhile, the lightning arrester 4 is directly connected with the fan blade steel plate framework 2, so that the stability of the fan blade structure is improved, and the lightning protection effect of the wind power turbulence structure is remarkably improved.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (8)
1. The utility model provides a wind-force vortex structure which characterized in that: the wind power turbulence structure is arranged at the outer side end part of the fan blade, and the fan blade steel plate framework extends and is inserted into the wind power turbulence structure; the wind power turbulence structure comprises a wind power turbulence structure body and a lightning receptor arranged at the tip end of the wind power turbulence structure body, and the lightning receptor is in conductive connection with the blade steel plate skeleton; the wind power turbulence structure body is of a dorsal fin structure, the windward side surface is of a conical edge structure, and ribs and grooves which are arranged at intervals and consistent with the transverse inclination radian of the fan blade are symmetrically arranged on the two sides of the wind power turbulence structure body; the depth of the convex rib and the groove is one fifth of the thickness of the wind turbulence structure; the side face of the wind power turbulence structure body is provided with a vent hole which transversely penetrates through the wind power turbulence structure body, a sliding sleeve is inserted into the vent hole, the sliding sleeve is of a hollow tubular structure, the outer side end of the sliding sleeve is arranged in a sealing mode, at least 2 opening gaps are formed in the side wall of the sliding sleeve along the length direction of the sliding sleeve, the inner side end of the sliding sleeve is provided with an outwards protruding limiting boss, 2 inwards protruding limiting blocks are arranged in the vent hole, and the limiting boss is clamped between the 2 limiting blocks; the outer side of the sliding sleeve between the 2 limiting blocks is sleeved with a spring; the sliding sleeve is parallel to the plane of the vent hole air outlet under the condition of no external force.
2. The wind turbulence structure as recited in claim 1, wherein: the sliding sleeve is close to the fin that sets up at least a set of outside outstanding on the lateral wall of ventilation hole air outlet one side, sets up the draw-in groove on the lateral wall of ventilation hole, the fin can slide along the draw-in groove under the exogenic action, when not receiving the exogenic action, the fin is blocked into in the draw-in groove under the effect of spring.
3. The wind turbulence structure as recited in claim 1, wherein: the cross sections of the grooves and the ribs are arc curves, triangles or trapezoids.
4. The wind turbulence structure as recited in claim 1, wherein: the number of the opening gaps is 4.
5. The wind turbulence structure as recited in claim 2, wherein: the opening slits and the tail fin are arranged in 4 alternately.
6. The wind turbulence structure as recited in claim 2, wherein: the fin is inclined to be spiral along the axial direction of the vent hole, and the length of the fin along the axial direction of the vent hole is smaller than the compressible length of the spring.
7. The wind turbulence structure as recited in claim 1, wherein: the wind turbulence structure body gradually reduces from top to bottom.
8. The wind turbulence structure as recited in claim 1, wherein: the thickness of the wind turbulence structure body gradually decreases from the windward side to the leeward side.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011611766.5A CN112796931B (en) | 2020-12-30 | 2020-12-30 | Wind power turbulence structure |
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| CN202011611766.5A CN112796931B (en) | 2020-12-30 | 2020-12-30 | Wind power turbulence structure |
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| CN112796931B true CN112796931B (en) | 2023-06-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111706460A (en) * | 2020-05-19 | 2020-09-25 | 上海大学 | Controllable second-level flap extending system carried by wind driven generator blade |
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| CN101749180B (en) * | 2008-12-02 | 2012-02-01 | 叶东华 | Vane of vertical shaft type wind driven generator |
| US7896614B2 (en) * | 2009-04-30 | 2011-03-01 | General Electric Company | Wind turbine blade with integrated stall sensor and associated method of detecting stall of a wind turbine blade |
| US8425190B2 (en) * | 2009-10-26 | 2013-04-23 | United Ship Design And Development Center | Pressure relief device |
| US8016560B2 (en) * | 2010-09-17 | 2011-09-13 | General Electric Company | Wind turbine rotor blade with actuatable airfoil passages |
| JP2013087766A (en) * | 2011-10-18 | 2013-05-13 | Watanabe Kinzoku Kogyosho:Kk | Blade of lift type vertical-axis wind turbine |
| US20130149153A1 (en) * | 2011-12-09 | 2013-06-13 | Euros Entwicklungsgesellschaft Fur Windkraftanlagen Mbh | Wind turbine blade |
| US20150003985A1 (en) * | 2013-06-27 | 2015-01-01 | General Electric Company | Moveable surface features for wind turbine rotor blades |
| DK177907B1 (en) * | 2013-11-21 | 2014-12-15 | Envision Energy Denmark Aps | Wind turbine blade with wave shaped trailing edge |
| CN106762389A (en) * | 2016-12-20 | 2017-05-31 | 北京金风科创风电设备有限公司 | Blade tip, blade of wind generating set and blade tip installation method |
| CN108894912A (en) * | 2018-09-07 | 2018-11-27 | 苏州若谷新能源科技有限公司 | A kind of wind energy conversion system vortex generator regulating device |
| CN209818203U (en) * | 2019-03-08 | 2019-12-20 | 中国科学院工程热物理研究所 | Wind-powered electricity generation blade forked type apex gasbag structure and wind-powered electricity generation blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111706460A (en) * | 2020-05-19 | 2020-09-25 | 上海大学 | Controllable second-level flap extending system carried by wind driven generator blade |
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