CN114710059B - Friction nano generator for collecting wind energy - Google Patents
Friction nano generator for collecting wind energy Download PDFInfo
- Publication number
- CN114710059B CN114710059B CN202210410958.2A CN202210410958A CN114710059B CN 114710059 B CN114710059 B CN 114710059B CN 202210410958 A CN202210410958 A CN 202210410958A CN 114710059 B CN114710059 B CN 114710059B
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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 24
- 239000007787 solid Substances 0.000 claims abstract description 13
- 239000003989 dielectric material Substances 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 9
- 238000003306 harvesting Methods 0.000 claims 1
- 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
- 238000000926 separation method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004146 energy storage Methods 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
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 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
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Wind Motors (AREA)
Abstract
The invention discloses a friction nano generator for collecting wind energy. The friction nano generator structure comprises a base, a bracket, a rotating shaft, fan blades and an internal friction power generation unit. The fan blades are detachable and hollow, and each fan blade is internally provided with an array type cylindrical groove with two communicated ends. 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 blade of the friction generator can rotate around the shaft under the drive of wind, water drops, water waves and other forces, so that the dielectric material solid ball inside the fan blade rolls back and forth along the direction vertical to the rotating shaft and periodically contacts and separates with the electrode pair fixed in the cylindrical groove, thereby realizing friction power generation. The friction nano generator for collecting wind energy has the advantages of stable structure, reliable output performance, good durability, suitability for various working environments such as sunny and rainy days, capability of being used for collecting water drop energy and water wave energy at the same time, and realization of more efficient environmental energy collection.
Description
Technical Field
The invention relates to a novel structure friction nano generator (Triboelectric nanogenerator, 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 sources, nano generators, self-powered sensing and the like.
Background
At present, the device structure for collecting wind energy by utilizing a friction power generation technology is mainly divided into two major types, one type is a friction nano-generator based on a rotating structure, the friction nano-generator with the structure converts wind energy into rotating mechanical energy by utilizing a wind cup or a wind turbine structure, and the periodic contact and separation of friction layers in the rotating process are realized by respectively installing positive and negative friction layers on a rotor and a stator, so that the friction power generation is realized to convert the rotating mechanical energy into electric energy. The structure has the advantages of high output performance and large correlation between the output electric signal and wind speed, and is more advantageous 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 also has the defects of larger volume, high cost, complex process, no suitability for collecting weak wind energy, larger influence by environmental humidity and the like.
The other type is a friction nano generator for collecting wind energy based on a vibration structure, wherein the structure mainly comprises a vibration sheet moving under the action of wind force and a rigid plate which is fixed, and friction power generation is realized through contact and separation between the vibration sheet and an upper electrode and a lower electrode which are fixed. The vibrator sheet is often made of flexible materials such as silk fabrics, film structures and the like. The wind energy collection friction nano 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, quicker loss of the flutter sheets, 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 achieve the technical purpose, the invention adopts the following technical scheme:
The friction nano generator structure comprises a base, two brackets, a rotating shaft, three fan blades and five friction power generation units. The two brackets are fixed at two ends of the base, two ends of the rotating shaft are respectively rotatably supported on the two brackets through deep groove ball bearings, three fan blades are fixed on the rotating shaft, and the angle between any two fan blades is 120 degrees. The fan blade consists of two identical half fan blades, two sides of each half fan blade are provided with a communicating groove, the inner surface of each half fan blade is provided with a plurality of array type semi-cylindrical grooves, the inner surface between the two communicating grooves is provided with a plurality of array type semi-cylindrical grooves, two electrodes insulated from each other are coated on the surface of each semi-cylindrical groove and the communicating groove, friction layers are coated on the groove parts of the electrodes, when the two half fan blades are relatively fixed, a plurality of cylindrical grooves isolated from the external environment are formed in the fan blades, a plurality of dielectric material solid balls 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. Further, the cylindrical groove is perpendicular to the rotating shaft to ensure that the dielectric material solid ball reciprocates, one flange is arranged at intervals of 120 degrees in the middle of the rotating shaft, the whole structure is in three flange connections, three fan blades are in one-to-one correspondence with the three flange connections, and the three fan blades are fixed with the rotating shaft through the flange structure. The design of the three fan blades can ensure the stability of the friction nano generator system in the rotation process.
Further, the rotating shaft is a hollow shaft and is provided with a through hole 15 overlapped with the shaft center, two ends of each flange structure for fixing the fan blades on the rotating shaft are respectively provided with a connecting through hole 16 communicated with the through hole 15, the design is used for collecting the output ends of the friction nano-generator positioned in the fan blades together, and finally the output ends are led out from the shaft center position with the angular velocity of 0 at the two ends of the rotating shaft, so that performance test and energy storage are facilitated; the whole rotating shaft is rotatably supported on the two brackets through the deep groove ball bearing rotating shaft, so that the resistance in the rotating process of the rotating shaft is reduced.
The friction nano generator has the beneficial effects that the wind energy collection friction nano generator with the novel structure realizes the following three aspects 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 wind energy collection, enables the fan blade to rotate under the action of wind power or water drops and water waves, collects wind energy, water drops and water waves, and can work normally in sunny and rainy days; the composite energy collection system is more convenient to realize, can be integrated with energy collection modes such as solar power generation, hydroelectric power generation, electromagnetic power generation and the like, and can collect energy in the environment better; the friction nano generator has stable performance and reliable output signal, and the TENG of the structure is more sensitive to wind speed, can work at low wind speed of 3m/s, greatly improves the environmental energy utilization rate, and is beneficial to realizing the energy collection and self-powered sensing of low wind speed.
Drawings
The invention is further described below with reference to the drawings 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 a single blade;
FIG. 4 is an enlarged longitudinal cross-sectional view of a friction layer in a cylindrical groove;
FIG. 5 is a block diagram of a spindle;
FIG. 6 is a block diagram of a bracket;
Reference numerals illustrate: the device comprises a base 1, a support 2, a support 3, a first screw 4, a deep groove ball bearing 5, a half 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 material solid ball 14, a through hole 15 and a communication hole 16.
Detailed Description
As shown in FIG. 1, the three blades are designed to convert wind energy into mechanical energy and provide power for the contact and separation of the positive friction layer and the negative friction layer. As shown in fig. 2, the fan blade can be disassembled into two identical half fan blades 6 from the side, two sides of each half fan blade 6 are provided with a communication groove 11, a plurality of array semi-cylindrical grooves 10 are formed on the inner surface between the two communication grooves 11, two electrodes 12 insulated from each other are coated on the surface of each semi-cylindrical groove 10 and the communication groove 11, a friction layer 13 is coated on the groove parts of the electrodes 12, when the two half fan blades 6 are relatively fixed, a plurality of cylindrical grooves isolated from the external environment are formed in the fan blade, a plurality of dielectric material solid balls 14 are placed in each cylindrical groove, and the electrodes 12 of each semi-cylindrical groove 10 are connected in series through the communication grooves 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 whole blade isolates the influence of the external environment on the friction power generation unit placed in the internal cylindrical groove, provides a stable environment for the friction power generation process, reduces the weight of the blade, and makes the blade more sensitive to wind energy.
The friction generating unit in the blade internal groove in the embodiment shown in fig. 3 and 4 is also the core of the friction nano generator, and the friction nano generator adopts a dielectric independent layer mode. The friction layer 13 is structured as shown in fig. 3 in order to increase the contact area as much as possible, reduce the resistance, and improve the sensitivity of the friction layer 13 to contact and separation with the change of external wind energy. The solid balls 14 of dielectric material are placed in the semi-cylindrical grooves 10, and rub along with the rotation of the fan blades, the friction layer 13 rotates back and forth on the surface of the friction layer, so that friction charges are generated on the friction layer 13 and the surface of the solid balls 14 of dielectric material, the position of the solid balls 14 of charged dielectric material changes to enable potential difference to be formed on the electrode 12 pair on the back surface of the friction layer 13, and external circuit electrons are driven to flow to generate electricity. Considering that the larger the difference of electron losing capability of the friction layer 13 is, the more charges are generated by friction, the better the performance of the friction generator is, a nylon 66 (PA 66) film with strong electron losing capability is selected as the friction layer 13, a solid ball 14 of Polytetrafluoroethylene (PTFE) dielectric material with strong electron losing capability and easy movement along with fan blades is selected, metal Al is selected as the electrode 12, a uniform metal film layer such as Al and the like is formed on the inner surface of a cylindrical groove by means of magnetron sputtering, atomic layers and the like to serve as the electrode 12, two electrodes 12 are arranged in each pipeline, and the distance range of the electrodes 12 is adjustable. The solid balls 14 of dielectric material roll back and forth in the surface of the friction layer 13 during rotation of the fan blade, increasing the contact area and achieving more adequate contact. When the solid ball 14 of the outer dielectric material is far away from and near the rotating shaft 7, the gravity center of the fan blade is offset due to the change of the position of the solid ball, so that the rotation of the fan blade is promoted, and the continuous circulation of the friction power generation process of contact separation is ensured.
In the embodiment shown in fig. 5, in order to facilitate the disassembly and assembly of the fan blades, the performance test and energy storage of the friction nano generator are performed, the rotating shaft 7 is specially designed, the rotating shaft 7 is a hollow shaft, and a through hole 15 coinciding with the axis is formed. 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, three fan blades are in one-to-one correspondence with the three flange connections, and the three fan blades and the rotating shaft 7 are fixed together through the flange structures. Each flange connection has a through hole 16 at each end. The friction nano generators on the three fan blades can be collected in the through hole 15 of the rotating shaft through the communication hole 16 and finally led out from the shaft center of the rotating shaft 7 with the angular velocity of 0 at both ends, so that the performance test and the connection of both ends of the rotating shaft 7 of the electric equipment are fixed on the bracket through the deep groove ball bearings 5. The spherical deep groove bearing 5 greatly reduces friction force in 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 support comprises a lower support 2 and an upper support 3 which are fixedly connected, and semicircular grooves matched with deep groove ball bearings 5 are formed in the lower support 2 and the upper support 3 and used for connecting the output end of the friction nano generator with electric equipment.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (4)
1. The friction nano generator for collecting wind energy is characterized by comprising a base (1), two brackets, a rotating shaft (7) and three fan blades; two brackets are fixed at two ends of the base (1), two ends of the rotating shaft (7) are respectively rotatably supported on the two brackets through deep groove ball bearings (5), three fan blades are fixed on the rotating shaft (7), and the angle between any two fan blades is 120 degrees; the fan blade consists of two identical half fan blades (6), two sides of each half fan blade (6) are provided with a communicating groove (11), the inner surface between the two communicating grooves (11) is provided with a plurality of array semi-cylindrical grooves (10), the surface of each semi-cylindrical groove (10) and the communicating groove (11) are coated with two mutually insulated electrodes (12), the groove parts of the electrodes (12) are coated with friction layers (13), when the two half fan blades (6) are relatively fixed, a plurality of cylindrical grooves isolated from the external environment are formed in the fan blades, and a plurality of dielectric material solid 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 friction nano-generator for harvesting wind energy according to claim 1, characterized in that the cylindrical groove inside the fan blade (6) is perpendicular to the rotation axis (7); the communicating groove (11) is parallel to the rotating shaft (7) and communicates with the outside air.
3. The friction nano generator 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 communication holes (16) are communicated with the through holes (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 holes (15) of the hollow shaft through the communication holes (16), and are led out from the shaft center positions with the angular speed of 0 at the two ends of the rotating shaft (7).
4. The friction nano generator for collecting wind energy according to claim 1, wherein the bracket comprises a lower bracket (2) and an upper bracket (3) which are fixedly connected, and semicircular grooves matched with the deep groove ball bearings (5) are formed in the lower bracket (2) and the upper bracket (3).
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN114710059A CN114710059A (en) | 2022-07-05 |
| CN114710059B true CN114710059B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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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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| CN114710059A (en) | 2022-07-05 |
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