CN114710059A - Friction nanometer generator for collecting wind energy - Google Patents
Friction nanometer generator for collecting wind energy Download PDFInfo
- Publication number
- CN114710059A CN114710059A CN202210410958.2A CN202210410958A CN114710059A CN 114710059 A CN114710059 A CN 114710059A CN 202210410958 A CN202210410958 A CN 202210410958A CN 114710059 A CN114710059 A CN 114710059A
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- friction
- rotating shaft
- fan blades
- power generation
- wind energy
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- 238000010248 power generation Methods 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 14
- 238000003306 harvesting Methods 0.000 claims 2
- 239000003989 dielectric material Substances 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000000926 separation method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- -1 Polytetrafluoroethylene Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
-
- 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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- Wind Motors (AREA)
Abstract
The invention discloses a friction nano generator for collecting wind energy. The friction nanometer generator structure comprises a base, a support, a rotating shaft, fan blades and an internal friction generating unit. The fan blades are detachable and hollow, and an array type cylindrical groove with communicated two ends is arranged in each fan blade. The friction power generation unit required by power generation is arranged in the cylindrical groove in the fan blade and isolated from the external environment. The fan blades of the friction generator can rotate around the shaft under the driving of wind, water drops, water waves and other forces, so that the solid dielectric material balls in the fan blades roll back and forth along the direction perpendicular to the rotating shaft and are periodically contacted and separated with the electrode pairs fixed in the cylindrical grooves, and friction power generation is realized. The friction nano generator for collecting wind energy disclosed by the invention has the advantages of stable structure, reliable output performance, good durability, suitability for various working environments such as sunny and rainy days and the like, and capability of collecting water drop energy and water wave energy at the same time, and more efficient environmental energy collection is realized.
Description
Technical Field
The invention relates to a novel-structure friction nano generator (TENG) which can be used for collecting environmental energy such as wind energy, water drop energy, water wave energy and the like. The method is mainly applied to the fields of micro-nano energy, nano generators, self-powered sensing and the like.
Background
The friction nanometer generator with the structure converts wind energy into rotary mechanical energy by utilizing a wind cup or a wind turbine structure, and then a positive friction layer and a negative friction layer are respectively arranged on a rotor and a stator to realize periodic contact separation of the friction layers in the rotating process, so that the rotary mechanical energy is converted into electric energy by friction power generation. The structure has the advantages of high output performance and large correlation between the output electric signal and the wind speed, and has more advantages in realizing self-powered sensing; and because the structure is similar to an electromagnetic generator, the structure is easier to integrate with other energy collection modes such as electromagnetic power generation, solar power generation and the like, thereby realizing composite energy collection. However, the structure has the defects of large volume, high cost, complex process, incapability of collecting weak wind energy, large influence of environmental humidity and the like.
The other type is a friction nano generator for collecting wind energy based on a flutter structure, the structure mainly comprises a flutter sheet moving under the action of wind power and a fixed rigid plate, and friction power generation is realized through contact separation between the flutter sheet and a fixed upper electrode and a fixed lower electrode. The fluttering sheet is usually made of flexible materials, such as silk fabrics, thin-film structures and the like. The wind energy collection friction nanometer generator has the characteristics of simple process, small volume, capability of collecting tiny wind energy and convenience for large-scale integration. However, due to the characteristics of wind-induced vibration, the structure has the defects of unstable output signals, high flutter sheet loss, large influence of environmental humidity and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a friction nano generator for collecting wind energy.
In order to realize the technical purpose, the invention adopts the following technical scheme:
the friction nanometer generator structure comprises five parts, namely a base, two supports, a rotating shaft, three fan blades and a friction power generation unit. The two supports are fixed at the two ends of the base, the two ends of the rotating shaft are rotatably supported on the two supports through deep groove ball bearings respectively, the three fan blades are fixed on the rotating shaft, and the angle between any two fan blades is 120 degrees. The fan blades consist of two identical half fan blades, communicating grooves are formed in two sides of each half fan blade, a plurality of array-type semi-cylindrical grooves are formed in the inner surface between the two communicating grooves, two electrodes which are insulated from each other are coated on the surface of each semi-cylindrical groove and the communicating grooves, friction layers are coated on the groove parts of the electrodes, a plurality of cylindrical grooves isolated from the external environment are formed in the fan blades when the two half fan blades are relatively fixed, a plurality of solid spheres made of dielectric materials are placed in each cylindrical groove, and the electrodes of the grooves are connected in series through the communicating grooves to form a friction power generation unit; the friction power generation units of the three fan blades are connected in parallel and then connected with external equipment. Furthermore, the cylindrical groove is perpendicular to the rotating shaft to ensure that the solid sphere of the dielectric material does reciprocating motion, the middle part of the rotating shaft is provided with one flange connection every 120 degrees, the whole structure has three flange connections, and the three fan blades correspond to the three flange connections one by one and are fixed with the rotating shaft through the flange structure. The three fan blades are designed to ensure the stability of the friction nano generator system in the rotating process.
Furthermore, the rotating shaft is a hollow shaft and is provided with a through hole 15 overlapped with the shaft center, two ends of the flange structure of each fixed fan blade on the rotating shaft are respectively provided with a connecting through hole 16 which is communicated with the through hole 15, the design is to collect the output ends of the friction nano-generator positioned in the fan blades together and finally lead out from the shaft center position with the angular speed of 0 at the two ends of the rotating shaft so as to facilitate performance test and energy storage; the whole rotating shaft is rotatably supported on the two supports through the deep groove ball bearing rotating shaft, so that the resistance of the rotating shaft in the rotating process is reduced.
The invention has the beneficial effects that the friction nanometer generator realizes the following three beneficial effects by the special design of the fan blade structure: the special fan blade structure isolates the external environment and the friction power generation unit, greatly reduces the influence of air humidity on the friction nano generator for collecting wind energy, enables the fan blade to rotate under the action of wind power or water drops and water waves, collects the wind energy, the water drops energy and the water waves energy, and can work normally in all weather; the composite energy collection system is more convenient to realize, can be integrated with energy collection modes such as solar power generation, hydroelectric generation, electromagnetic power generation and the like, and can better collect energy in the environment; the friction nano generator has stable performance and reliable output signals, and the TENG of the structure is more sensitive to wind speed and can work at low wind speed of 3m/s, so that the environmental energy utilization rate is greatly improved, and the advantages of low wind speed energy acquisition and self-powered sensing are favorably realized.
Drawings
The invention is further explained below with reference to the figures and examples;
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a block diagram of a half blade;
FIG. 3 is an enlarged cross-sectional view of the entire blade;
FIG. 4 is an enlarged longitudinal cross-sectional view of the friction layer in the cylindrical groove;
FIG. 5 is a structural view of a rotating shaft;
FIG. 6 is a block diagram of a stand;
description of reference numerals: the fan comprises a base 1, a support 2, a support 3, a first screw 4, a deep groove ball bearing 5, a half fan blade 6, a rotating shaft 7, a second screw 8, a third screw 9, a semi-cylindrical groove 10, a communication groove 11, an electrode 12, a friction layer 13, a dielectric solid ball 14, a through hole 15 and a communication hole 16.
Detailed Description
As shown in fig. 1, the fan blades have three blades, and the design of the fan blades is to convert wind energy into mechanical energy and provide power for the contact separation of the positive friction layer and the negative friction layer. As shown in fig. 2, the fan blade can be detached from the side to form two identical half fan blades 6, two sides of the half fan blades 6 are provided with communicating slots 11, the inner surface between the two communicating slots 11 is provided with a plurality of arrayed semi-cylindrical grooves 10, the surface of each semi-cylindrical groove 10 and the communicating slot 11 are coated with two electrodes 12 insulated from each other, the groove parts of the electrodes 12 are coated with friction layers 13, when the two half fan blades 6 are fixed relatively, a plurality of cylindrical grooves isolated from the external environment are formed in the fan blade, a plurality of solid spheres 14 of dielectric material are placed in each cylindrical groove, and the electrodes 12 of each semi-cylindrical groove 10 are connected in series through the communicating slots 11 to form a friction power generation unit; the friction power generation units of the three fan blades are connected in parallel and then connected with external equipment. The fixed integral fan blade isolates the influence of the external environment on the friction power generation unit arranged in the internal cylindrical groove, thereby reducing the weight of the fan blade while providing a stable environment for the friction power generation process and enabling the fan blade to be more sensitive to wind energy.
The friction generating unit in the slot inside the fan blade in the embodiment shown in fig. 3 and 4 is also the core of the friction nano-generator, which adopts a dielectric independent layer mode. In order to increase the contact area as much as possible, reduce the resistance, and increase the sensitivity of the friction layer 13 to contact separation with external wind energy, the structure of the friction layer 13 is shown in fig. 3. The solid ball 14 of the dielectric material is placed in the semi-cylindrical groove 10, and rotates along with the rotation of the fan blade, the solid ball rolls back and forth on the surface of the friction layer 13 to generate friction charge, so that friction charge is generated on the surfaces of the friction layer 13 and the solid ball 14 of the dielectric material, and the position change of the charged solid ball 14 of the dielectric material enables the electrode 12 on the back surface of the friction layer 13 to form a potential difference, and an external circuit is driven to flow electrons to generate power. Considering that the larger the difference of the electron gaining and losing capabilities of the friction layer 13 is, the more the charges generated by friction is, the better the performance of the friction generator is, the nylon 66(PA66) film with strong electron losing capability is selected as the friction layer 13, the solid ball 14 made of Polytetrafluoroethylene (PTFE) dielectric material with strong electron losing capability and capable of moving along with the fan blade more easily is selected, the metal Al is selected as the electrode 12, the uniform metal film layer such as Al and the like is formed on the inner surface of the cylindrical groove in the modes of magnetron sputtering, atomic layer and the like and is used as the electrode 12, two electrodes 12 are arranged in each pipeline, and the distance range of the electrodes 12 is adjustable. The solid sphere 14 of dielectric material rolls back and forth in the surface of the friction layer 13 during rotation of the fan blade, increasing the contact area and achieving a more complete contact. In addition, when the solid ball 14 made of dielectric material is far away from and close to the rotating shaft 7, the gravity center of the fan blade is shifted due to the position change of the solid ball, so that the rotation of the fan blade is promoted, and the continuous circulation of the contact separation friction power generation process is ensured.
In the embodiment shown in fig. 5, in order to facilitate the disassembly and assembly of the fan blades, the performance test of the friction nano-generator and the energy storage, the rotating shaft 7 is specially designed, and the rotating shaft 7 is a hollow shaft and is provided with a through hole 15 coinciding with the shaft center. The middle part of the rotating shaft 7 is provided with one flange connection every 120 degrees, the whole structure is provided with three flange connections, and the three fan blades are in one-to-one correspondence with the three flange connections and are fixed with the rotating shaft 7 through the flange structures. Each flange connection has a through-hole 16 at each end. The friction nanometer generators on the three fan blades can be converged in the through hole 15 of the rotating shaft through the connecting through hole 16 and finally led out from the axle center with the angular speed of 0 at the two ends of the rotating shaft 7, so that the two ends of the rotating shaft 7 of the electrical equipment for performance test and connection are fixed on the support through the deep groove ball bearings 5. The spherical deep groove bearing 5 greatly reduces the friction force in the rotation of the rotating shaft 7, so that the wind energy collecting device can collect wind energy in the environment more sensitively.
As shown in fig. 6, the bracket comprises a lower bracket 2 and an upper bracket 3 which are fixedly connected, and the lower bracket 2 and the upper bracket 3 are both provided with a semicircular groove matched with a deep groove ball bearing 5 for connecting the output end of the friction nano generator with electric equipment.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A friction nanometer generator for collecting wind energy is characterized by comprising a base (1), two supports, a rotating shaft (7) and three fan blades; the two supports are fixed at two ends of the base (1), two ends of the rotating shaft (7) are rotatably supported on the two supports through deep groove ball bearings (5), three blades are fixed on the rotating shaft (7), and the angle between any two blades is 120 degrees; the fan blades are composed of two identical half fan blades (6), communicating grooves (11) are formed in two sides of each half fan blade (6), a plurality of array-type semi-cylindrical grooves (10) are formed in the inner surface between the two communicating grooves (11), two electrodes (12) which are insulated from each other are coated on the surface of each semi-cylindrical groove (10) and the communicating grooves (11), friction layers (13) are coated on the groove parts of the electrodes (12), when the two half fan blades (6) are fixed relatively, a plurality of cylindrical grooves isolated from the external environment are formed in the fan blades, and a plurality of solid dielectric balls (14) are placed in each cylindrical groove to form a friction power generation unit; the friction power generation units of the three fan blades are connected in parallel and then connected with external equipment.
2. A triboelectric nanogenerator for the harvesting of wind energy according to claims 1 and 2, characterized by the fact that the cylindrical grooves inside the blades (6) are perpendicular to the axis of rotation (7); the communicating groove (11) is parallel to the rotating shaft (7) and is communicated with the outside air.
3. The friction nanogenerator for collecting wind energy according to claim 1, wherein the rotating shaft (7) is a hollow shaft, the hollow part is a through hole (15) overlapped with the center of the rotating shaft, three flange structures for fixing fan blades are arranged on the rotating shaft (7), and two ends of each flange structure are respectively provided with a connecting through hole (16); the connecting through hole (16) is communicated with the through hole (15) on the main body of the rotating shaft (7), so that the output ends of the friction power generation units on the three fan blades are collected in the through hole (15) of the hollow shaft through the connecting through hole (16) and are led out at the axle center position of which the angular speed at the two ends of the rotating shaft (7) is 0.
4. The friction nanogenerator for harvesting wind energy according to claim 1, wherein the support comprises a lower support (2) and an upper support (3) which are fixedly connected, and the lower support (2) and the upper support (3) are both provided with a semicircular groove matched with the deep groove ball bearing (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210410958.2A CN114710059B (en) | 2022-04-19 | 2022-04-19 | Friction nano generator for collecting wind energy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210410958.2A CN114710059B (en) | 2022-04-19 | 2022-04-19 | Friction nano generator for collecting wind energy |
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| CN114710059A true CN114710059A (en) | 2022-07-05 |
| CN114710059B CN114710059B (en) | 2024-05-28 |
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| CN202210410958.2A Active CN114710059B (en) | 2022-04-19 | 2022-04-19 | Friction nano generator for collecting wind energy |
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| CN114710059B (en) | 2024-05-28 |
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