CN112196731A - Blade pitch angle variable vertical axis wind turbine power generation device - Google Patents
Blade pitch angle variable vertical axis wind turbine power generation device Download PDFInfo
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- CN112196731A CN112196731A CN202011135457.5A CN202011135457A CN112196731A CN 112196731 A CN112196731 A CN 112196731A CN 202011135457 A CN202011135457 A CN 202011135457A CN 112196731 A CN112196731 A CN 112196731A
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- 238000010248 power generation Methods 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000008859 change Effects 0.000 claims abstract description 13
- 238000004146 energy storage Methods 0.000 claims abstract description 8
- UJCHIZDEQZMODR-BYPYZUCNSA-N (2r)-2-acetamido-3-sulfanylpropanamide Chemical compound CC(=O)N[C@@H](CS)C(N)=O UJCHIZDEQZMODR-BYPYZUCNSA-N 0.000 claims description 2
- 241001669680 Dormitator maculatus Species 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
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- 238000013459 approach Methods 0.000 description 1
- 238000012942 design verification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/005—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor the axis being vertical
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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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
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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
- F03D7/00—Controlling wind motors
- F03D7/06—Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
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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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
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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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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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)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to the technical field of wind power generation, in particular to a power generation device of a vertical axis wind turbine with a variable blade pitch angle. The device includes: a base; a vertical shaft disposed on the base in a vertical direction; the generator comprises a stator and a rotor, the rotor is rotatably connected to the vertical shaft, the stator is arranged on the periphery of the rotor, and the rotor can rotate relative to the stator; the energy storage device is connected with the generator and is used for storing the electric energy generated by the generator; blades distributed in a vertical direction around a circumference of the vertical shaft; the pitch changing mechanism is connected with the blade and the rotor and can change the pitch angle of the blade; by controlling the variable pitch mechanism, the change of the blade pitch angle is realized according to the optimization calculation result under different wind speed conditions.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a power generation device of a vertical axis wind turbine with a variable blade pitch angle.
Background
The cleanness, the reproducibility and the large-scale application technology of wind energy are mature day by day, so that wind power generation becomes a clean power generation mode with development prospect in the field of new energy resources, except nuclear power.
The basic principle of wind power generation is that wind wheels rotate under the action of wind force, wind energy is converted into mechanical work, the mechanical work drives a rotor to rotate, and finally a generator is driven to convert kinetic energy into electric energy. Experiments show that the variable-pitch vertical axis wind turbine has good self-starting performance, and the power generation power is higher than that of a fixed-pitch vertical axis wind turbine.
Wind power generation is divided into a horizontal shaft and a vertical shaft, people recognize some adverse factors brought by the horizontal shaft along with the development of science and technology, and the vertical shaft wind driven generator is more and more concerned by people due to the advantages of simple structure, wind receiving multiple directions, environmental protection, easiness in installation and maintenance and the like.
In the rotating process of the vertical axis wind turbine, the attack angle of the blade is constantly changed along with the azimuth angle, and the blade cannot be maintained at the optimal attack angle, which is the main reason of low wind energy utilization rate. The main approach for improving the wind energy utilization rate of a wind turbine is to change the pitch angle to achieve the purpose of adjusting the angle of attack.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a variable blade pitch angle vertical axis wind turbine generator, which is simple to use, and which can adjust the blade pitch angle in real time according to the wind speed during power generation, thereby improving the power generation efficiency.
In order to achieve the above object, an embodiment of the present invention provides a variable blade pitch angle vertical axis wind turbine power generation device, including:
a base;
a vertical shaft disposed on the base in a vertical direction;
the generator comprises a stator and a rotor, the rotor is rotatably connected to the vertical shaft, the stator is arranged on the periphery of the rotor, and the rotor can rotate relative to the stator;
the energy storage device is connected with the generator and is used for storing the electric energy generated by the generator;
blades distributed in a vertical direction around a circumference of the vertical shaft;
the pitch changing mechanism is connected with the blade and the rotor and can change the pitch angle of the blade;
characterized in that, the variable pitch mechanism comprises:
the guide plate is fixedly connected to the top end of the vertical shaft, and a guide groove is formed in the guide plate;
one end of the first connecting rod is fixedly connected to the rotor, and the other end of the first connecting rod is hinged to the blade;
one end of the second connecting rod is movably connected to the guide groove, and the other end of the second connecting rod is fixedly connected to the blade;
wherein the inclination angle of the guide groove is γ, the length of the first connecting rod is b, the distance between the connecting points of the first connecting rod and the second connecting rod on the blade is c, the length of the second connecting rod is d, the length of the guide groove is a, and the following requirements are met:
preferably, the blade adopts a symmetrical wing vertical axis wind turbine blade airfoil NACA 0015.
Preferably, at λ ═ 2, the value of a is 45 mm.
Preferably, the number of the blades is 5, and the number of the guide grooves is 5.
Preferably, one end of the second connecting rod, which is connected with the guide groove, is fixedly connected with a guide post, and the guide post is inserted into the guide groove.
Preferably, the blade assembly further comprises a third connecting rod, the third connecting rod is located right below the first connecting rod, one end of the third connecting rod is fixedly connected to the rotor, and the other end of the third connecting rod is hinged to the blade.
The working principle is as follows: by controlling the length of the guide groove in the variable pitch mechanism, the extension length of the second connecting rod is adjusted according to the optimization calculation result under different wind speeds, namely, one end of the second connecting rod, which is connected with the guide groove, moves in the guide groove to drive the second connecting rod to pull the blade to swing, so that the change of the blade pitch angle is realized. When the future wind direction is parallel to the tail vane indicating direction, the future wind direction is used as an adjusting reference of a variable pitch strategy, and the tail vane can realize real-time wind alignment of the wind turbine. When the wind direction changes, the tail vane also rotates along with the wind, so that the incoming wind direction is always parallel to the indication direction of the tail vane, and the pitch control strategy is always carried out on the adjustment reference to adapt to the change of the wind direction.
In the design of the double-crank variable-pitch mechanism researched by the application, the basic conditions for forming the double-crank mechanism are firstly met: the rod length of each rod is greater than zero and meets the rod length condition, and the inclination angle of the guide groove is between 0 and 25 degrees for the convenience of later control.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a variable blade pitch angle vertical axis wind turbine generator according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of the structure at M in FIG. 1;
FIG. 3 is a simplified schematic diagram of a pitch control mechanism in a variable blade pitch angle vertical axis wind turbine generator;
FIG. 4 is a schematic view of a blade configuration in a variable blade pitch angle vertical axis wind turbine generator.
In the figure:
a base 1;
a vertical axis 2;
a blade 3;
a guide plate 41;
a guide groove 411;
a first connecting rod 42;
a second connecting rod 43;
a guide rod 431;
a rotor 51;
and a stator 52.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
The vertical axis wind turbine is gradually popular with people due to the advantages of simple structure, no need of wind, low manufacturing and maintenance cost, environmental friendliness and the like. However, the attack angle of the blade changes with the azimuth angle constantly when the wind turbine operates, the blade cannot be kept at the optimal attack angle constantly, and dynamic stall occurs, so that the flow field of the wind turbine is disturbed, and the aerodynamic performance of the wind turbine is reduced. At present, a method for adjusting an attack angle by changing a blade pitch angle is one of effective ways for improving the wind energy utilization rate of a wind turbine, and the method is gradually favored by people with the advantages of simple and efficient adjustment mode, low manufacturing, installation and maintenance cost and the like.
In order to realize real-time adjustment of the pitch angle, the influence of dynamic stall on the pitch angle adjustment is realized, and dynamic data are introduced into the calculation of a pitch angle adjustment rule.
According to the fitted local blade pitch angle adjusting rule, the transmission mechanism is designed to ensure that the blade pitch angle is closest to the fitted pitch angle adjusting curve, so that the pitch changing rule of the wind turbine at different wind speeds is realized. In order to ensure that the pitch angle of the vertical axis wind turbine periodically changes according to the sine-like law in the whole rotation process and meet the requirements of compact structure, reliable transmission and the like, the variable pitch mechanism adopts a double-crank variable pitch mechanism as a design prototype and is further improved on the basis.
A variable blade pitch angle vertical axis wind turbine generator according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, and 4.
The variable blade 3 pitch angle vertical axis 2 wind turbine power generation device comprises: a base 1, a vertical shaft 2, a mechanical system for energy capture and transfer, and an electrical system for electrical energy generation and conversion.
The base 1 is used for being supported on the bottom surface or a test bed or a test stand, and design verification and simulation can be conveniently achieved.
The mechanical system comprises blades 3 and a variable pitch mechanism, wherein the variable pitch mechanism is arranged at the upper end of the vertical shaft 2 and is formed by a crank connecting rod mechanism consisting of a plurality of connecting rods and a guide plate 41.
The electric system comprises a generator and an energy storage device, wherein the generator forms a power generation system in the mechanical system, and the energy storage device converts and stores electric energy generated by the generator.
Specifically, a vertical shaft 2 is arranged on a base 1 along the vertical direction, the vertical shaft 2 forms a main shaft of a wind turbine power generation device, a plurality of blades 3 for receiving wind energy are arranged along the circumferential direction of the vertical shaft 2, and the blades 3 transmit the received wind energy to a generator through a mechanical system.
The generator comprises a stator 52 and a rotor 51, the rotor 51 is rotatably connected to the vertical shaft 2, the stator 52 is provided with the periphery of the rotor 51, the rotor 51 can rotate relative to the stator 52, and generating coils are arranged in the stator 52 and the rotor 51, so that the blades 3 are connected to the rotor 51, when the blades 3 receive wind energy to rotate, the rotating force is transmitted to the rotor 51 to drive the rotor 51 to rotate relative to the stator 52, and the generation of electric energy is realized.
In order to realize the conversion and storage of the electric energy generated by the generator, the generator is connected to the energy storage device, the energy storage device is used for converting and storing the electric energy generated by the generator, and the energy storage device is designed and selected by the person skilled in the art according to the needs, and the invention is not limited.
The blades 3 of the vertical axis 2 wind turbine power generation device are distributed around the vertical axis 2 along the vertical direction, and compared with a horizontal axis wind turbine power generation device, the structure has the advantages of simple structure, wind receiving multiple directions, environmental protection, easiness in installation and maintenance and the like.
Specifically, the blade 3 transmits the received wind energy to the generator through the mechanical system, specifically, the blade 3 is connected to the rotor 51 of the generator through a pitch mechanism, and the pitch mechanism can change the pitch angle of the blade 3 and transmit the wind energy received by the blade 3 to the rotor 51.
Specifically, the pitch mechanism includes a guide plate 41, a first connecting rod 42 and a second connecting rod 43 connecting the rotor 51 and the blade 3, wherein the guide plate 41 is fixedly connected to the top end of the vertical shaft 2, the guide plate 41 may be a plate-shaped circular shape, a plurality of guide slots 411 are formed in the guide plate 41, the guide slots 411 are racetrack-shaped, and the size of the guide slots 411 defines the variation range of the pitch angle of the blade 3.
The guide plate 41, the first connecting rod 42, the second connecting rod 43 and the blade 3 form a double-crank link mechanism, and the connection relationship among them is as follows: one end of the first connecting rod 42 is fixedly connected to the rotor 51, and the other end is hinged to the blade 3, so that the blade 3 can rotate relative to the first connecting rod 42, specifically, one end of the first connecting rod 42 is fixedly connected to the outer surface of the rotor 51 through a plurality of screws, and the other end is connected to the blade 3 through a spherical hinge; one end of the second connecting rod 43 is movably connected to the guiding slot 411, and the other end of the second connecting rod 43 is fixedly connected to the blade 3, so that when one end of the second connecting rod 43 moves in the guiding slot 411, the blade 3 is driven to rotate relative to the joint of the first connecting rod 42, and when the design is performed, the positions of the first connecting rod 42 and the second connecting rod 43, which are connected to the blade 3, have a certain distance.
Wherein the inclination angle of the guide slot 411 is γ, the length of the first connecting rod 42 is b, the distance between the connecting points of the first connecting rod 42 and the second connecting rod 43 on the blade 3 is c, the length of the second connecting rod 43 is d, the length of the guide slot 411 is a, and the following conditions are satisfied:
in the design of the double-crank variable-pitch mechanism researched by the application, the basic conditions for forming the double-crank mechanism are firstly met: the rod length of each rod is greater than zero and satisfies the rod length condition, and for the convenience of later control, the inclination angle of the guide slot 411 should be between 0 ° and 25 °.
The working principle of the double-crank variable pitch mechanism of the vertical axis 2 wind turbine is shown in figure 3. Wherein, the rod OA is a guide slot 411 of the double-crank variable pitch mechanism, and the rod OA keeps the position as shown in fig. 3 when the wind direction and the wind speed are not changed, and the length is not changed; the rod OC is used as a first connecting rod 42 for connecting the blades 3 and is always kept unchanged in the operation process; BC is the chord length of the blade 3, the distance between the connecting points of the first connecting rod and the second connecting rod 43 on the blade 3, and is used as the connecting rod between the two cranks; the lever AB is a second link lever 43 for changing the pitch angle of the blade 3, and when the wind turbine rotates in a full circle, the lever AB drives the blade 3BC to rotate around the point C by a revolute pair of A, B two points, thereby changing the pitch angle of the blade 3.
The working principle is as follows: the extension length of the electric push rod is equivalent to the rod OA of fig. 3, i.e. the length of the guide slot 411 in the pitch control mechanism, and under different wind speeds, the extension length of the second connecting rod 43 is adjusted according to the optimized calculation result to drive the second connecting rod 43 to pull the blade 3 to swing, so as to change the pitch angle of the blade 3. When the future wind direction is parallel to the tail vane indicating direction, the future wind direction is used as an adjusting reference of a variable pitch strategy, and the tail vane can realize real-time wind alignment of the wind turbine. When the wind direction changes, the tail vane also rotates along with the wind, so that the incoming wind direction is always parallel to the indication direction of the tail vane, and the pitch control strategy is always carried out on the adjustment reference to adapt to the change of the wind direction.
The application carries out theoretical design aiming at the double-crank variable pitch mechanism designed above. For the vertical axis 2 wind turbine, the link mechanism is used for controlling the angle of the blade 3 and does not transmit power, so for simplifying calculation, the pressure angle and the transmission angle of the mechanism can be temporarily not considered, only the consistency of the angle change of the link and the designed pitch angle adjusting scheme is considered, the square difference between the actual pitch angle and the ideal pitch angle is used as an objective function in the process of rotating the mechanism for one circle, a mathematical model is established by taking the minimum objective function as an optimization target, and the change rule of the actual pitch angle is deduced according to the geometric relationship in the graph 3.
TABLE 1 optimal solution for each parameter
As can be seen from table 1, β is a pitch angle, and when the tip speed ratio changes, the length d and the angle β of the push rod AB do not change much, so that only the length a of the frame OA is adjusted during the actual operation when the tip speed ratio changes, and meanwhile, for the convenience of the machining of the pitch mechanism, a is an integer, and λ is 2, and a is 45 mm. The optimal solution can guide the specific parameter design of the crank-link mechanism.
The blades 3 are symmetrical wing vertical wind wheel blades 3 and symmetrical wing NACA0015 profiles, and in order to enable the stress effect of the wind turbine to be better, 1kW H-shaped symmetrical wing vertical axis 2 wind wheel blades 3 and symmetrical wing NACA0015 profiles are adopted.
In order to test and verify the variable blade 3 pitch angle vertical axis 2 wind turbine generator designed in the present application, a pitch angle β of 0.15 was obtained by taking a value of a as 45mm using λ as 2, and a corresponding test model was created.
Specifically, in the present test model, there are 5 vanes 3 and 5 guide grooves 411.
When the improvement is specifically optimized, in order to facilitate the adjustment of the end of the second connecting rod 43 located in the guide slot 411, a guide post 431 is fixedly connected to the end of the second connecting rod 43 located in the guide slot 411, and the guide post 431 is inserted into the guide slot 411.
In order to fix the blade 3 and stably and reliably transmit wind energy, the wind power generator further comprises a third connecting rod, the third connecting rod is located right below the first connecting rod 42, one end of the third connecting rod is fixedly connected to the rotor 51, and the other end of the third connecting rod is hinged to the blade 3.
According to the vertical axis 2 wind turbine with the local variable pitch, the double-crank variable pitch mechanism is adopted to realize real-time adjustment of the pitch angle of the blade 3, and the wind energy utilization rate of the vertical axis 2 wind turbine is further improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A variable blade pitch angle vertical axis wind turbine power generation device, comprising:
a base;
a vertical shaft disposed on the base in a vertical direction;
the generator comprises a stator and a rotor, the rotor is rotatably connected to the vertical shaft, the stator is arranged on the periphery of the rotor, and the rotor can rotate relative to the stator;
the energy storage device is connected with the generator and is used for storing the electric energy generated by the generator;
blades distributed in a vertical direction around a circumference of the vertical shaft;
the pitch changing mechanism is connected with the blade and the rotor and can change the pitch angle of the blade;
characterized in that, the variable pitch mechanism comprises:
the guide plate is fixedly connected to the top end of the vertical shaft, and a guide groove is formed in the guide plate;
one end of the first connecting rod is fixedly connected to the rotor, and the other end of the first connecting rod is hinged to the blade;
one end of the second connecting rod is movably connected to the guide groove, and the other end of the second connecting rod is fixedly connected to the blade;
wherein the inclination angle of the guide groove is gamma, the length of the first connecting rod is b, and the connecting points of the first connecting rod and the second connecting rod on the bladeIs c, the length of the second connecting rod is d, the length of the guide groove is a, and the following requirements are met:
2. the variable blade pitch angle vertical axis wind turbine power plant of claim 1,
the blade adopts a symmetrical wing vertical axis wind turbine blade profile NACA 0015.
3. The variable blade pitch angle vertical axis wind turbine power plant of claim 1,
under the condition of lambda being 2, the a being 45 mm.
4. The variable blade pitch angle vertical axis wind turbine generator of claim 1, wherein said blades are 5 and said guide slots are 5.
5. The variable blade pitch angle vertical axis wind turbine generator of claim 1, wherein a guide post is fixedly connected to an end of the second connecting rod that is connected to the guide slot, the guide post being inserted into the guide slot.
6. The variable blade pitch angle vertical axis wind turbine generator of claim 1, further comprising a third connecting rod positioned directly below the first connecting rod, the third connecting rod having one end fixedly connected to the rotor and another end hingedly connected to the blade.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135457.5A CN112196731A (en) | 2020-10-21 | 2020-10-21 | Blade pitch angle variable vertical axis wind turbine power generation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135457.5A CN112196731A (en) | 2020-10-21 | 2020-10-21 | Blade pitch angle variable vertical axis wind turbine power generation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810474A (en) * | 2022-03-23 | 2022-07-29 | 武汉理工大学 | Vertical axis wind turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810474A (en) * | 2022-03-23 | 2022-07-29 | 武汉理工大学 | Vertical axis wind turbine |
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