CN114542390A - Coaxial contra-rotating vertical shaft wind generating set utilizing bionic blades - Google Patents

Coaxial contra-rotating vertical shaft wind generating set utilizing bionic blades Download PDF

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Publication number
CN114542390A
CN114542390A CN202210194747.XA CN202210194747A CN114542390A CN 114542390 A CN114542390 A CN 114542390A CN 202210194747 A CN202210194747 A CN 202210194747A CN 114542390 A CN114542390 A CN 114542390A
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China
Prior art keywords
rotor
fan blade
generator
bionic
blade
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Pending
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CN202210194747.XA
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Chinese (zh)
Inventor
李庆安
蔡畅
荣晓敏
宋娟娟
廖猜猜
钟晓晖
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Institute of Engineering Thermophysics of CAS
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Institute of Engineering Thermophysics of CAS
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Priority to CN202210194747.XA priority Critical patent/CN114542390A/en
Publication of CN114542390A publication Critical patent/CN114542390A/en
Pending legal-status Critical Current

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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
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • 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
    • F03D15/00—Transmission of mechanical power
    • F03D15/20—Gearless transmission, i.e. direct-drive
    • 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
    • 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 
    • F03D3/02—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having a plurality of rotors
    • 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
    • F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
    • 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
    • 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
    • F03D3/064—Fixing wind engaging parts to rest of rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/005—Machines with only rotors, e.g. counter-rotating rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/301—Cross-section characteristics
    • 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 provides a coaxial counter-rotating vertical shaft wind generating set utilizing bionic blades, which comprises a fixed base, a fixed main shaft, an upper fan blade rotor, a lower fan blade rotor and a disc generator, wherein the upper fan blade rotor, the lower fan blade rotor and the disc generator are sequentially arranged on the fixed main shaft from top to bottom along the vertical direction, the upper and lower groups of coaxial bionic blades adopt NACA0021 as a basic wing shape, the sine wave simulates the protruding fluctuation shape of the front edge of a whale pectoral wing shape, the upper and lower groups of coaxial bionic blades are respectively connected with the generator rotor and the stator, and the upper and lower groups of blades rotate along opposite directions, so that the relative rotating speed of the stator and the rotor of the generator is improved, the advantage of good pneumatic performance of the bionic blades is fully utilized, and the generating efficiency is effectively improved.

Description

Coaxial contra-rotating vertical shaft wind generating set utilizing bionic blades
Technical Field
The invention belongs to the technical field of wind driven generators, relates to a vertical axis wind generating set, and particularly relates to a coaxial counter-rotating vertical axis wind generating set utilizing bionic blades.
Background
At present, in the process of converting a world energy structure into a renewable sustainable development system, wind energy is developed and utilized on a large scale as a widely distributed renewable clean energy, and plays a considerable role in solving energy crisis and environmental protection problems.
The wind power generator can be divided into a horizontal axis wind power generator and a vertical axis wind power generator according to the rotation direction. Compared with a horizontal axis wind turbine, the vertical axis wind turbine has the advantages that: the space and the area that the impeller occupy are less, need not yaw system, and the pylon is made comparatively simply, and unit easy maintenance. However, vertical axis wind turbines also have disadvantages, 1: compared with a horizontal axis wind turbine, the vertical axis wind turbine has lower wind energy utilization rate; 2, because the requirements on wind speed change and load change are strict, the pneumatic performance is poor when the airflow is not stable and the turbulence is large, and the high-efficiency operation is difficult.
Therefore, it is desirable to provide a wind turbine that solves the problems of low wind energy utilization and poor aerodynamic performance while maintaining the advantages of a vertical axis wind turbine.
Disclosure of Invention
In order to solve the problems, the invention provides a coaxial counter-rotating vertical axis wind generating set utilizing bionic blades, wherein an upper group of coaxial bionic blades and a lower group of coaxial bionic blades are respectively connected with a generator rotor and a generator stator, and the upper group of coaxial bionic blades and the lower group of coaxial bionic blades rotate along opposite directions, so that the relative rotating speed of the generator stator and the generator rotor is improved, the advantage of good pneumatic performance of the bionic blades is fully utilized, and the generating efficiency is effectively improved.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a coaxial counter-rotating vertical shaft wind generating set utilizing bionic blades comprises a fixed base, a fixed main shaft, an upper blade rotor, a lower blade rotor and a disk generator, wherein the fixed main shaft is fixedly arranged on the fixed base along the vertical direction, the upper blade rotor, the lower blade rotor and the disk generator are sequentially arranged on the fixed main shaft from top to bottom along the vertical direction, the upper blade rotor comprises an upper blade shaft and a plurality of upper bionic blades which are fixedly connected on the upper blade shaft through blade supports and uniformly distributed along the circumferential direction, the lower blade rotor comprises a lower blade shaft and a plurality of lower bionic blades which are fixedly connected on the lower blade shaft through blade supports and uniformly distributed along the circumferential direction, the disk generator comprises a disk generator rotor part and a disk generator stator part, and the coaxial counter-rotating vertical shaft wind generating set is characterized in that,
the upper fan blade shaft and the lower fan blade shaft are hollow cylinders sleeved on the fixed main shaft, the lower end of the upper fan blade shaft is fixedly connected with one of the rotor part and the stator part of the disc type generator, the upper end of the lower fan blade shaft is fixedly connected with the other of the rotor part and the stator part of the disc type generator,
the upper end of the upper fan blade shaft is rotatably arranged on the fixed main shaft through an upper fan blade bearing and the lower end of the upper fan blade shaft is rotatably arranged on the fixed main shaft through a disc type generator rotor bearing or a disc type generator stator bearing,
the upper end of the lower fan blade shaft is rotatably arranged on the fixed main shaft through a disc type generator stator bearing or a disc type generator rotor bearing, and the lower end of the lower fan blade shaft is rotatably arranged on the fixed main shaft through a lower fan blade bearing,
the upper bionic fan blade and the lower bionic fan blade in the upper fan blade rotor and the lower fan blade rotor are designed to rotate in opposite directions under the action of wind force.
The coaxial counter-rotating vertical shaft wind generating set utilizing the bionic blades provided by the invention also has the characteristics that the upper bionic blade and the lower bionic blade simulate the front edge of the whale pectoral fin wing type by sine wavesThe bulge is in a wavy shape, the bulge is in an outward expanding type, and the wave trough is in a standard airfoil shape. The shape formula of the front edge protrusion of the bionic fan blade is as follows:
Figure BDA0003526761430000022
wherein A is the amplitude of the leading edge, ω is the angular velocity,
Figure BDA0003526761430000021
is the initial phase, and k is the offset. Furthermore, in the upper bionic fan blade and the lower bionic fan blade, the ratio of the amplitude A of the front edge of the fan blade to the chord length c of the airfoil shape is 0.015-0.1, and the ratio of the wavelength lambda to the chord length c of the airfoil shape is 0.25-0.75. Preferably, the initial phase
Figure BDA0003526761430000031
Take 0 and offset k 0.
Preferably, the ratio of the amplitude A of the leading edge of the blade to the chord length c of the airfoil is 0.025, and the ratio of the wavelength lambda to the chord length c of the airfoil is 0.75.
The coaxial counter-rotating vertical shaft wind generating set utilizing the bionic blades is further characterized in that the rotor part of the disc type generator comprises a rotor magnetic yoke (an upper end cover) and a rotor magnetic pole arranged on the rotor magnetic yoke, and the rotor magnetic yoke is rotatably arranged on the fixed main shaft through a disc type generator rotor bearing.
The coaxial counter-rotating vertical shaft wind generating set utilizing the bionic blades is further characterized in that the stator part of the disc type generator comprises a stator base (a lower end cover), a stator core and a stator winding, wherein the stator core and the stator winding are arranged on the stator base, and the stator base is rotatably arranged on the fixed main shaft through a rotor bearing of the disc type generator.
The coaxial counter-rotating vertical shaft wind generating set utilizing the bionic blades further has the characteristic that the top of the fixed main shaft is provided with the lightning rod.
According to the coaxial counter-rotating vertical shaft wind generating set utilizing the bionic blades, the number of the upper bionic blades and the number of the lower bionic blades are respectively 2-6.
Compared with the prior art, the coaxial counter-rotating vertical shaft wind generating set utilizing the bionic blades has the following remarkable technical effects:
(1) according to the coaxial counter-rotating vertical axis wind generating set utilizing the bionic blades, the blades imitate the protruding shape of the front edge of the pectoral fin wing type of a whale, the pneumatic performance of the blades is optimized, and the operation efficiency and the stability of the wind generating set are further improved.
(2) According to the coaxial counter-rotating vertical axis wind generating set utilizing the bionic blades, the upper and lower groups of coaxial bionic blades are respectively connected with the rotor and the stator of the generator, and the upper and lower groups of blades rotate in opposite directions, so that the relative rotating speed of the rotor and the stator of the generator is increased, and the generating efficiency is effectively improved.
Drawings
FIG. 1 is a schematic structural view of a coaxial counter-rotating vertical axis wind turbine generator system utilizing bionic blades according to the present invention;
FIG. 2 is a schematic view of the shape of a bionic blade according to the present invention;
FIG. 3 is a schematic diagram showing the relationship between the lift coefficient and the angle of attack of the bionic blade with different amplitudes and wavelengths (the incoming flow wind speed is 12.5m/s, and the Reynolds coefficient is 2.3 × 10)5 Turbulence intensity 16%);
FIG. 4 is a schematic diagram showing the relationship between the drag coefficient and the attack angle of the bionic blade with different amplitudes and wavelengths (the incoming flow wind speed is 12.5m/s, and the Reynolds coefficient is 2.3 × 10)5 Turbulence intensity 16%);
FIG. 5 is a schematic diagram showing the relationship between lift-drag ratio and attack angle of bionic blades with different amplitudes and wavelengths (incoming flow velocity is 12.5m/s, Reynolds coefficient is 2.3 × 10)5 Turbulence intensity 16%);
wherein: 1: a lightning rod; 2: mounting a bionic fan blade; 3: an upper fan blade shaft; 4: a lower bionic fan blade; 5: a lower fan blade shaft; 6: fixing the main shaft; 7: a fixed base; 8: a disk generator rotor portion; 8A: a rotor yoke (upper end cover); 8B: a rotor magnetic pole; 9: a disk generator stator portion; 9A: a stator core; 9B: a stator winding; 9C: a stator base (lower end cover); 10: a fan blade bearing is arranged; 11: a disc generator rotor bearing; 12: a disc generator stator bearing; 13: and a lower fan blade bearing.
Detailed Description
In order to make the technical means, creation features, achievement objects and effects of the present invention easy to understand, the following embodiments are specifically described with reference to the accompanying drawings.
In the description of the embodiments of the present invention, it should be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the invention.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
FIG. 1 is a schematic structural diagram of a coaxial counter-rotating vertical axis wind turbine generator system utilizing bionic blades provided by the invention. As shown in fig. 1, the coaxial counter-rotating vertical axis wind turbine generator system using bionic blades provided by the invention comprises a lightning rod 1, an upper bionic blade 2, an upper blade shaft 3, a lower bionic blade 4, a lower blade shaft 5, a fixed main shaft 6, a fixed base 7, a disk generator rotor part 8, a disk generator stator part 9, an upper blade bearing 10, a disk generator rotor bearing 11, a disk generator stator bearing 12 and a lower blade bearing 13. The upper bionic fan blade 2 is fixedly connected with the upper fan blade shaft 3 through a blade support, and meanwhile, the upper fan blade shaft 3 is fixed with a rotor part 8 of the disc generator. The lower bionic fan blade 4 is fixedly connected with the lower fan blade shaft 5 through a blade support, and meanwhile, the lower fan blade shaft 5 is fixed with the disc type generator stator part 9. The upper fan blade shaft 3 is connected with the fixed main shaft 6 through an upper fan blade bearing 10 and a disc type generator rotor bearing 11. The lower fan blade shaft 5 is connected with the fixed main shaft 6 through a disc type generator stator bearing 12 and a lower fan blade bearing 15. The disk generator rotor portion 8 is composed of a rotor yoke (upper end cover) 8A and a rotor magnetic pole 8B. The disk generator stator part 9 is composed of a stator core 9A, a stator winding 9B and a stator base (lower end cover) 9C.
As shown in fig. 2, the upper and lower bionic blades 2 and 4 both adopt NACA0021 as basic airfoils, and a sine wave is used to simulate the protruding wave shape of the leading edge of the whale pectoral fin airfoil, the chord length c is 0.265m, the wavelength λ is 0.75c, the span length L is 1.2m, the number of cycles N is 6, and the amplitude a is 0.025 c.
When the embodiment works, the upper bionic fan blade 2 rotates clockwise (overlooking direction), so that the upper fan blade shaft 3 and the rotor part 8 of the disc generator are driven to rotate along the same direction; the lower bionic fan blade 4 rotates anticlockwise (in a overlooking direction), so that the lower fan blade shaft 5 and the disk type generator stator part 9 are driven to rotate in the same direction. The rotor part 8 of the disc generator and the stator part 9 of the disc generator rotate in a reciprocal way, and the stator winding cuts the magnetic field of the magnetic pole of the rotor to generate current which is led out to a power grid or electric equipment through the fixed main shaft 6.
3-5, the stall aerodynamics of the blades can be optimized by the coaxial counter-rotating vertical axis wind turbine generator set utilizing the bionic blades; on the other hand, the relative rotating speed of the stator and the rotor of the generator can be increased, the generating efficiency is improved, and the problem of low wind energy utilization rate in the prior art is solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (7)

1. A coaxial counter-rotating vertical shaft wind generating set utilizing bionic blades comprises a fixed base, a fixed main shaft, an upper blade rotor, a lower blade rotor and a disk generator, wherein the fixed main shaft is fixedly arranged on the fixed base along the vertical direction, the upper blade rotor, the lower blade rotor and the disk generator are sequentially arranged on the fixed main shaft from top to bottom along the vertical direction, the upper blade rotor comprises an upper blade shaft and a plurality of upper bionic blades which are fixedly connected on the upper blade shaft through blade supports and uniformly distributed along the circumferential direction, the lower blade rotor comprises a lower blade shaft and a plurality of lower bionic blades which are fixedly connected on the lower blade shaft through blade supports and uniformly distributed along the circumferential direction, the disk generator comprises a disk generator rotor part and a disk generator stator part, and the coaxial counter-rotating vertical shaft wind generating set is characterized in that,
the upper fan blade shaft and the lower fan blade shaft are hollow cylinders sleeved on the fixed main shaft, the lower end of the upper fan blade shaft is fixedly connected with one of the rotor part and the stator part of the disc type generator, the upper end of the lower fan blade shaft is fixedly connected with the other of the rotor part and the stator part of the disc type generator,
the upper end of the upper fan blade shaft is rotatably arranged on the fixed main shaft through an upper fan blade bearing and the lower end of the upper fan blade shaft is rotatably arranged on the fixed main shaft through a disc type generator rotor bearing or a disc type generator stator bearing,
the upper end of the lower fan blade shaft is rotatably arranged on the fixed main shaft through a disc type generator stator bearing or a disc type generator rotor bearing, and the lower end of the lower fan blade shaft is rotatably arranged on the fixed main shaft through a lower fan blade bearing,
the upper bionic fan blade and the lower bionic fan blade in the upper fan blade rotor and the lower fan blade rotor are designed to rotate in opposite directions under the action of wind force.
2. Coaxial counter-rotating vertical axis wind generator with biomimetic blades according to the previous claimsThe motor set is characterized in that the upper bionic fan blade and the lower bionic fan blade simulate the protruding wave shape of the front edge of the pectoral fin wing of the whale by sine waves, the protruding part is in an outward expansion type, the wave trough is in a standard wing type, and the protruding shape formula of the front edge of the bionic fan blade is as follows:
Figure FDA0003526761420000011
wherein A is the amplitude of the leading edge, ω is the angular velocity,
Figure FDA0003526761420000021
is the initial phase, and k is the offset.
3. The co-axial counter-rotating vertical axis wind turbine generator set utilizing the bionic blades as claimed in claim 2, wherein in the upper bionic blade and the lower bionic blade, the ratio of the amplitude A of the blade leading edge to the chord length c of the airfoil profile is 0.015-0.1, and the ratio of the wavelength λ to the chord length c of the airfoil profile is 0.25-0.75.
4. A co-axial and counter-rotating vertical axis wind turbine generator set with biomimetic blades as claimed in the preceding claim, characterized in that the disc generator rotor portion comprises a rotor yoke and a rotor magnetic pole arranged on the rotor yoke, the rotor yoke being rotatably arranged on the stationary main shaft by the disc generator rotor bearing.
5. The wind turbine generator set with coaxial and counter-rotating vertical shafts and bionic blades as claimed in the preceding claim, wherein the disc generator stator part comprises a stator base, a stator core and a stator winding, wherein the stator core and the stator winding are arranged on the stator base, and the stator base is rotatably arranged on the fixed main shaft through a disc generator rotor bearing.
6. The wind turbine generator system with coaxial and counter-rotating vertical shafts and bionic blades as claimed in the preceding claims, wherein a lightning rod is arranged at the top of the fixed main shaft.
7. The coaxial counter-rotating vertical axis wind turbine generator system utilizing bionic blades as claimed in the preceding claim, wherein the number of the upper bionic blades and the number of the lower bionic blades are respectively 2-6.
CN202210194747.XA 2022-03-01 2022-03-01 Coaxial contra-rotating vertical shaft wind generating set utilizing bionic blades Pending CN114542390A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117060674A (en) * 2023-10-11 2023-11-14 南开大学 Electromagnetic power generation device based on bionic fluctuation fin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117060674A (en) * 2023-10-11 2023-11-14 南开大学 Electromagnetic power generation device based on bionic fluctuation fin
CN117060674B (en) * 2023-10-11 2023-12-22 南开大学 Electromagnetic power generation device based on bionic fluctuation fin

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