Friction nanometer generator

Abstract

A friction nanometer generator disclosed by the present invention comprises a collection unit, a conversion unit and an output unit, the collection unit comprises an input shaft and a base, the conversion unit comprises a roller and a fixed cylinder, the outer wall surface of the roller and the inner wall surface of the fixed cylinder are both provided with friction materials, and the polarities of the friction materials of the roller and the fixed cylinder are opposite; the output unit comprises an energy storage electrode layer and an output electrode layer. The input shaft drives the roller to rotate, the roller and the inner wall of the fixed cylinder rub and roll, and friction materials of the roller and the fixed cylinder have opposite polarities and rub to generate electric energy; the generated electric energy is injected into the energy storage electrode layer, the energy storage electrode layer transmits energy to the output electrode layer through electrostatic induction, and the output electrode layer generates current output. Friction resistance and material abrasion are reduced in a rolling contact mode, the energy storage electrode layer and the output electrode layer of the output unit are of a non-contact structure, a large number of charges are generated due to electrostatic induction, an efficient electric energy output system is formed, and the charge density and the output performance of the friction nanometer generator are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of friction nanometer power generation equipment and peripheral supporting facilities thereof, and in particular to a friction nanometer generator. Background Art

[0002] With the development of smart technology, more and more devices are being used in smart cities, smart homes, wearable devices and other fields, creating a huge demand for miniaturized and sustainable power sources. Traditional battery-powered methods have significant limitations, such as the need to regularly replace or recharge batteries and the difficulty of frequent battery maintenance in remote areas or densely deployed sensor networks. Therefore, it is of great significance and value to develop renewable green energy harvesting technology to power IoT nodes.

[0003] As a new energy harvesting technology, triboelectric nanogenerators can effectively capture mechanical energy (such as wind energy and vibration energy) in the environment through friction electrification and electrostatic induction, and convert it into electrical energy to power small electronic devices and sensors. Triboelectric nanogenerators have the advantages of flexible structural design, low-cost manufacturing, and environmental friendliness, which makes them show great potential in the field of self-powered power. However, the existing triboelectric nanogenerator technology still has some bottlenecks, such as low charge density, insufficient output power, and surface wear caused by friction. These problems affect its durability and long-term stability in practical applications. Summary of the invention

[0004] The purpose of the present invention is to provide a friction nanogenerator to solve the problems existing in the above-mentioned related technologies, increase the output power of the friction nanogenerator, and at the same time improve the stability and durability of the generator.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a friction nanogenerator, comprising:

[0007] A collecting unit, the collecting unit comprising an input shaft and a base, the input shaft being rotatably connected to the base;

[0008] A conversion unit, the conversion unit comprising a roller and a fixed cylinder, the input shaft can drive the roller to rotate, the roller is arranged inside the fixed cylinder, when the input shaft drives the roller to rotate, the roller rolls with friction with the inner wall of the fixed cylinder, the outer wall surface of the roller and the inner wall surface of the fixed cylinder both have friction materials, and the polarities of the friction materials of the two are opposite;

[0009] An output unit, wherein the output unit comprises an energy storage electrode layer and an output electrode layer, wherein the energy storage electrode layer is connected to the input shaft, and the energy storage electrode layer is electrically connected to the conversion unit, the energy storage electrode layer and the output electrode layer are arranged opposite to each other with a gap therebetween, and the energy storage electrode layer and the output electrode layer both have a plurality of sector-shaped regions, and the charge polarities of two adjacent sector-shaped regions are opposite.

[0010] Preferably, the collecting unit further comprises a wind scoop, the wind scoop is connected to the input shaft, and the wind scoop can drive the input shaft to rotate;

[0011] The wind scoop has a mounting ring, which is sleeved on the outside of the input shaft and fixed by a locking screw.

[0012] Preferably, the conversion unit further comprises a driving rotary disk, the input shaft is connected to the driving rotary disk and can drive the driving rotary disk to rotate, the driving rotary disk is rotatably disposed in the fixing cylinder and the two are coaxially disposed, and the roller is rotatably connected to the driving rotary disk;

[0013] There are multiple rollers, and the rollers are evenly distributed around the axis of the driving turntable.

[0014] Preferably, the driving rotary disk has a rotary shaft through hole allowing the input shaft to pass through, and the driving rotary disk is connected to the input shaft via the rotary shaft through hole;

[0015] The roller is rotatably connected to a mounting shaft, and the driving turntable also has a mounting hole adapted to the mounting shaft. The mounting shaft is connected to the driving turntable via the mounting hole, and the mounting shaft corresponds to the roller one by one.

[0016] Preferably, a polytetrafluoroethylene layer is provided on the outer wall surface of the roller, and a first copper interdigital electrode and a second copper interdigital electrode are provided on the inner wall surface of the fixed cylinder. When the roller rotates, the polytetrafluoroethylene layer generates electrical energy through friction with the first copper interdigital electrode and the second copper interdigital electrode, and the generated electrical energy is input into the energy storage electrode layer through an energy conversion circuit.

[0017] Preferably, an elastic structural layer is further provided between the outer wall surface of the roller and the polytetrafluoroethylene layer, and the elastic structural layer is made of sponge material.

[0018] Preferably, the first copper interdigital electrodes and the second copper interdigital electrodes are both a plurality of "X"-shaped structures connected end to end, and the first copper interdigital electrodes and the second copper interdigital electrodes are arranged opposite to each other.

[0019] Preferably, a first interdigitated electrode through hole and a second interdigitated electrode through hole are provided on the side wall of the fixed cylinder, and the electric energy generated by the friction between the polytetrafluoroethylene layer and the first copper interdigitated electrode and the second copper interdigitated electrode is led out from the first interdigitated electrode through hole and the second interdigitated electrode through hole by means of wires, connected to the energy conversion circuit, and injected into the energy storage electrode layer through a conductive slip ring.

[0020] Preferably, the collection unit further includes a first bearing seat and a second bearing seat, the input shaft rotatably passes through the first bearing seat and the second bearing seat, the first bearing seat is located at the top of the fixed cylinder and the two are detachably connected, and the second bearing seat is located between the fixed cylinder and the base and is detachably connected to the base.

[0021] Preferably, the first bearing seat and the fixing cylinder, and the second bearing seat and the base are connected by plug-in connection.

[0022] Compared with the related art, the present invention has achieved the following technical effects: the friction nanogenerator of the present invention includes a collection unit, a conversion unit and an output unit, wherein the collection unit includes an input shaft and a base, and the input shaft is rotatably connected to the base; the conversion unit includes a roller and a fixed cylinder, the input shaft can drive the roller to rotate, the roller is arranged inside the fixed cylinder, when the input shaft drives the roller to rotate, the roller and the inner wall of the fixed cylinder frictionally roll, the outer wall surface of the roller and the inner wall surface of the fixed cylinder both have friction materials and the polarities of the friction materials of the two are opposite; the output unit includes an energy storage electrode layer and an output electrode layer, the energy storage electrode layer is connected to the input shaft, and the energy storage electrode layer is electrically connected to the conversion unit, the energy storage electrode layer and the output electrode layer are arranged opposite to each other and there is a gap between the two, the energy storage electrode layer and the output electrode layer both have multiple sector-shaped areas, and the charge polarities of two adjacent sector-shaped areas are opposite.

[0023] The friction nanogenerator of the present invention has a collection unit that can collect external energy to drive the input shaft to rotate relative to the base, the input shaft drives the roller to rotate, the roller and the inner wall of the fixed cylinder rub and roll, the friction materials of the two have opposite polarities, and the friction generates electrical energy, thereby realizing the conversion of mechanical energy into electrical energy; the generated electrical energy is injected into the energy storage electrode layer, the energy storage electrode layer transfers energy to the output electrode layer through electrostatic induction, and the output electrode layer generates current output. The friction nanogenerator of the present invention adopts a rolling contact method to reduce friction resistance and material wear, the generated electrical energy is injected into the output unit, the energy storage electrode layer and the output electrode layer of the output unit adopt a non-contact structure, a large amount of charge is generated due to electrostatic induction, and an efficient electrical energy output system is formed, which effectively improves the charge density and output performance of the friction nanogenerator, and at the same time improves the stability and durability of the friction nanogenerator, reduces energy loss, and prolongs the service life of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a triboelectric nanogenerator disclosed in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the disassembled structure of the friction nanogenerator disclosed in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the structure of a wind scoop of a friction nanogenerator disclosed in an embodiment of the present invention;

[0028] Figure 4 It is a schematic structural diagram of a fixing cylinder of a friction nanogenerator disclosed in an embodiment of the present invention;

[0029] Figure 5 A schematic structural diagram of a roller of a friction nanogenerator disclosed in an embodiment of the present invention;

[0030] Figure 6 A schematic structural diagram of a driving turntable of a friction nanogenerator disclosed in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the principle of the energy conversion circuit of the friction nanogenerator disclosed in an embodiment of the present invention.

[0032] In the figure: 1, wind scoop; 2, first bearing seat; 3, fixing cylinder; 4, second bearing seat; 5, base; 6, input shaft; 7, roller; 8, driving turntable; 9, energy storage electrode layer; 10, output electrode layer; 11, conductive slip ring; 12, energy conversion circuit; 101, fixing threaded hole; 301, first copper interdigital electrode; 302, second copper interdigital electrode; 303, first interdigital electrode through hole; 304, second interdigital electrode through hole; 701, mounting shaft; 702, needle bearing; 703, elastic structure layer; 704, polytetrafluoroethylene layer; 801, shaft through hole; 802, mounting hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The purpose of the present invention is to provide a friction nanogenerator to solve the problems existing in the above-mentioned related technologies, increase the output power of the friction nanogenerator, and at the same time improve the stability and durability of the generator.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Embodiment 1

[0037] The present invention provides a friction nanogenerator, please refer to Figure 1-Figure 7 , including a collecting unit, a conversion unit and an output unit, wherein the collecting unit includes an input shaft 6 and a base 5, and the input shaft 6 is rotatably connected to the base 5; the conversion unit includes a roller 7 and a fixed cylinder 3, the input shaft 6 can drive the roller 7 to rotate, and the roller 7 is arranged inside the fixed cylinder 3. When the input shaft 6 drives the roller 7 to rotate, the roller 7 rolls with the inner wall of the fixed cylinder 3 by friction, and the outer wall surface of the roller 7 and the inner wall surface of the fixed cylinder 3 both have friction materials and the polarities of the friction materials of the two are opposite; the output unit includes an energy storage electrode layer 9 and an output electrode layer 10, the energy storage electrode layer 9 is connected to the input shaft 6, and the energy storage electrode layer 9 is electrically connected to the conversion unit, the energy storage electrode layer 9 and the output electrode layer 10 are arranged opposite to each other and there is a gap between the two, the energy storage electrode layer 9 and the output electrode layer 10 both have multiple sector-shaped areas, and the charge polarities of two adjacent sector-shaped areas are opposite.

[0038] The friction nanogenerator of the present invention has a collection unit that can collect external energy to drive the input shaft 6 to rotate relative to the base 5, and the input shaft 6 drives the roller 7 to rotate. The roller 7 and the inner wall of the fixed cylinder 3 are frictionally rolled, and the friction materials of the two have opposite polarities, and the friction generates electrical energy, thereby realizing the conversion of mechanical energy into electrical energy; the generated electrical energy is injected into the energy storage electrode layer 9, and the energy storage electrode layer 9 transfers energy to the output electrode layer 10 through electrostatic induction, and the output electrode layer 10 generates current output. The friction nanogenerator of the present invention adopts a rolling contact method to reduce friction resistance and material wear, and the generated electrical energy is injected into the output unit. The energy storage electrode layer 9 and the output electrode layer 10 of the output unit adopt a non-contact structure. Due to electrostatic induction, a large amount of charge is generated, forming an efficient electrical energy output system, which effectively improves the charge density and output performance of the friction nanogenerator, and at the same time improves the stability and durability of the friction nanogenerator, reduces energy loss, and prolongs the service life of the generator.

[0039] The collection unit further includes a wind scoop 1, which is connected to the input shaft 6. The wind scoop 1 can drive the input shaft 6 to rotate. The wind scoop 1 can collect environmental wind energy and convert it into mechanical energy to drive the input shaft 6 to rotate. In other specific embodiments of the present invention, the collection unit can also use other structural components to collect clean energy, such as using blades to collect wind energy or using a waterwheel to collect water energy.

[0040] To facilitate disassembly and assembly, the wind scoop 1 has a mounting ring, which is sleeved on the outside of the input shaft 6 and fixed by a locking screw. The mounting ring has a fixed threaded hole 101 that matches the locking screw, thereby improving the convenience of disassembly and assembly of the wind scoop 1 and ensuring the stability of the connection structure between the wind scoop 1 and the input shaft 6.

[0041] Specifically, the conversion unit further includes a driving rotary disk 8, the input shaft 6 is connected to the driving rotary disk 8 and can drive the driving rotary disk 8 to rotate, the driving rotary disk 8 is rotatably arranged in the fixed cylinder 3 and the two are coaxially arranged, and the roller 7 is rotatably connected to the driving rotary disk 8; there are multiple rollers 7, and the rollers 7 are uniformly distributed circumferentially around the axis of the driving rotary disk 8. The driving rotary disk 8 rotates, thereby driving the rollers 7 to rotate, and the rollers 7 roll in contact with the inner wall of the fixed cylinder 3 to generate electrical energy. The provision of multiple rollers 7 can increase the effective friction area between the rollers 7 and the fixed cylinder 3, so that the charge performance is further increased, which is conducive to improving the power generation performance.

[0042] The driving turntable 8 has a shaft through hole 801 that allows the input shaft 6 to pass through, and the driving turntable 8 is connected to the input shaft 6 via the shaft through hole 801; in actual applications, the two can be connected by key connection or threaded connection to ensure smooth power transmission.

[0043] Correspondingly, the roller 7 is rotatably connected with the mounting shaft 701, and the driving turntable 8 also has a mounting hole 802 adapted to the mounting shaft 701. The mounting shaft 701 is connected to the driving turntable 8 by means of the mounting hole 802, so as to ensure that the driving turntable 8 can drive the mounting shaft 701 and the roller 7 to rotate, which is equivalent to revolution, and the roller 7 rotates relative to the mounting shaft 701, which is equivalent to rotation, and the mounting shaft 701 corresponds to the roller 7 one by one. A needle bearing 702 is arranged between the mounting shaft 701 and the roller 7 to ensure that the roller 7 rolls smoothly.

[0044] More specifically, a polytetrafluoroethylene (PTFE) layer 704 is provided on the outer wall surface of the roller 7. The polytetrafluoroethylene layer 704 serves as a negative friction material and has excellent wear resistance and triboelectric properties. A first copper interdigital electrode 301 and a second copper interdigital electrode 302 are provided on the inner wall surface of the fixed cylinder 3 as a friction layer and an electrode. When the roller 7 rotates, the polytetrafluoroethylene layer 704 rubs with the first copper interdigital electrode 301 and the second copper interdigital electrode 302 to generate electrical energy, and the generated electrical energy is input into the energy storage electrode layer 9 through the energy conversion circuit 12.

[0045] In order to ensure that the polytetrafluoroethylene layer 704 can contact and rub with the first copper interdigital electrode 301 and the second copper interdigital electrode 302, an elastic structure layer 703 is further provided between the outer wall surface of the roller 7 and the polytetrafluoroethylene layer 704. The elastic structure layer 703 is made of sponge material, which improves the reliability of power generation. After the polytetrafluoroethylene layer 704 and the elastic structure layer 703 are worn and aged, they can be replaced, thereby extending the service life of the roller 7.

[0046] In this specific embodiment, the first copper interdigitated electrode 301 and the second copper interdigitated electrode 302 are both multiple "J"-shaped structures connected end to end. The first copper interdigitated electrode 301 and the second copper interdigitated electrode 302 are arranged relative to each other, which effectively increases the area of ​​the first copper interdigitated electrode 301 and the second copper interdigitated electrode 302, increases the contact area between the roller 7 and the first copper interdigitated electrode 301 and the second copper interdigitated electrode 302, and further improves the power generation performance of the generator.

[0047] In order to smoothly inject electric energy into the energy storage electrode layer 9, a first interdigitated electrode through hole 303 and a second interdigitated electrode through hole 304 are provided on the side wall of the fixed cylinder 3. The electric energy generated by the friction between the polytetrafluoroethylene layer 704 and the first copper interdigitated electrode 301 and the second copper interdigitated electrode 302 is led out from the first interdigitated electrode through hole 303 and the second interdigitated electrode through hole 304 by means of wires, and is connected to the energy conversion circuit 12, and is injected into the energy storage electrode layer 9 through the conductive slip ring 11. While smoothly transmitting electric energy, the conductive slip ring 11 is used to prevent the wire from affecting the normal operation of the rotating parts of the generator, thereby further improving the working reliability of the friction nanogenerator.

[0048] Furthermore, the collection unit also includes a first bearing seat 2 and a second bearing seat 4, and the input shaft 6 can rotatably pass through the first bearing seat 2 and the second bearing seat 4. The first bearing seat 2 is located at the top of the fixed cylinder 3 and the two are detachably connected. The second bearing seat 4 is located between the fixed cylinder 3 and the base 5 and is detachably connected to the base 5. The first bearing seat 2 and the second bearing seat 4 provide stable support for the input shaft 6, ensure the structural stability of the generator, and ensure that the input shaft 6 can drive the drive turntable 8, roller 7 and energy storage electrode layer 9 to rotate.

[0049] In this specific embodiment, the first bearing seat 2 and the fixing cylinder 3, and the second bearing seat 4 and the base 5 are all connected by plug-in connection, which is convenient for assembly and disassembly, and has uniform force and stable structure.

[0050] In addition, it should be noted that both the energy storage electrode layer 9 and the output electrode layer 10 can be prepared using PCB (printed circuit board), which has flexible design and good durability.

[0051] The friction nanogenerator of the present invention, when working, the wind scoop 1 collects environmental wind energy and converts it into rotational mechanical energy, driving the driving turntable 8 to rotate. The roller 7 is fixed by the mounting shaft 701 and the mounting hole 802 on the driving turntable 8 in a one-to-one correspondence. The mounting shaft 701 is equipped with a needle bearing 702. The surface of the roller 7 is covered with a flexible structural layer, and a layer of polytetrafluoroethylene layer 704 is attached to the surface of the flexible structural layer. The first copper interdigital electrode 301 and the second copper interdigital electrode 302 are installed on the inner wall of the fixed cylinder 3 as a friction layer and electrode. The polytetrafluoroethylene layer 704 is used as a negative friction material and has excellent wear resistance and triboelectric properties. When the driving turntable 8 rotates, friction occurs between the polytetrafluoroethylene layer 704 and the first copper interdigital electrode 301 and the second copper interdigital electrode 302, and the generated electric energy is led out through the first interdigital electrode through hole 303 and the second interdigital electrode through hole 304 provided on the fixed cylinder 3, and passes through the energy conversion circuit 12, and the electric energy is injected into the energy storage electrode layer 9 through the wire in the conductive slip ring 11. The energy storage electrode layer 9 transfers energy to the output electrode layer 10 through electrostatic induction, and generates a strong current output in the output electrode layer 10. The energy storage electrode layer 9 and the output electrode layer 10 are evenly divided into 16 sectors, and the charge polarities of two adjacent sectors are opposite. This design ensures that the system can generate a strong and stable power output during operation. It is worth noting that the energy storage electrode layer 9 and the output electrode layer 10 are non-contact designs, which avoid friction resistance and material wear, thereby effectively improving the stability and durability of the system and reducing energy loss. Through this optimized design, the friction nanogenerator of the present invention can continuously and stably output electrical energy. The entire system is efficient, stable and durable, and is widely used in various occasions requiring energy collection and management.

[0052] Embodiment 2

[0053] This embodiment provides an application system, including the friction nanogenerator of the first embodiment. The friction nanogenerator of the present invention provides reliable power support for various electronic devices.

[0054] The application system of this embodiment includes but is not limited to sensors, smart homes, robots, wearable electronic devices, etc.

[0055] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A friction nanogenerator, characterized in that: include: A collecting unit, the collecting unit comprising an input shaft and a base, the input shaft being rotatably connected to the base; A conversion unit, the conversion unit comprising a roller and a fixed cylinder, the input shaft can drive the roller to rotate, the roller is arranged inside the fixed cylinder, when the input shaft drives the roller to rotate, the roller rolls with friction with the inner wall of the fixed cylinder, the outer wall surface of the roller and the inner wall surface of the fixed cylinder both have friction materials, and the polarities of the friction materials of the two are opposite; An output unit, wherein the output unit comprises an energy storage electrode layer and an output electrode layer, wherein the energy storage electrode layer is connected to the input shaft, and the energy storage electrode layer is electrically connected to the conversion unit, the energy storage electrode layer and the output electrode layer are arranged opposite to each other with a gap therebetween, and the energy storage electrode layer and the output electrode layer both have a plurality of sector-shaped regions, and the charge polarities of two adjacent sector-shaped regions are opposite.

2. The triboelectric nanogenerator according to claim 1, characterized in that: The collecting unit further comprises a wind scoop, the wind scoop is connected to the input shaft, and the wind scoop can drive the input shaft to rotate; The wind scoop has a mounting ring, which is sleeved on the outside of the input shaft and fixed by a locking screw.

3. The triboelectric nanogenerator according to claim 1, characterized in that: The conversion unit further includes a driving rotary disk, the input shaft is connected to the driving rotary disk and can drive the driving rotary disk to rotate, the driving rotary disk is rotatably disposed in the fixing cylinder and the two are coaxially disposed, and the roller is rotatably connected to the driving rotary disk; There are multiple rollers, and the rollers are evenly distributed around the axis of the driving turntable.

4. The triboelectric nanogenerator according to claim 3, characterized in that: The driving rotary disk has a rotary shaft through hole allowing the input shaft to pass through, and the driving rotary disk is connected to the input shaft via the rotary shaft through hole; The roller is rotatably connected to a mounting shaft, and the driving turntable also has a mounting hole adapted to the mounting shaft. The mounting shaft is connected to the driving turntable via the mounting hole, and the mounting shaft corresponds to the roller one by one.

5. The triboelectric nanogenerator according to any one of claims 1 to 4, characterized in that: The outer wall surface of the roller is provided with a polytetrafluoroethylene layer, and the inner wall surface of the fixed cylinder is provided with a first copper interdigital electrode and a second copper interdigital electrode. When the roller rotates, the polytetrafluoroethylene layer rubs with the first copper interdigital electrode and the second copper interdigital electrode to generate electrical energy, and the generated electrical energy is input into the energy storage electrode layer through an energy conversion circuit.

6. The triboelectric nanogenerator according to claim 5, characterized in that: An elastic structural layer is also arranged between the outer wall surface of the roller and the polytetrafluoroethylene layer, and the elastic structural layer is made of sponge material.

7. The triboelectric nanogenerator according to claim 5, characterized in that: The first copper interdigital electrodes and the second copper interdigital electrodes are both multiple "X"-shaped structures connected end to end, and the first copper interdigital electrodes and the second copper interdigital electrodes are arranged opposite to each other.

8. The triboelectric nanogenerator according to claim 5, characterized in that: The side wall of the fixed cylinder is provided with a first interdigital electrode through hole and a second interdigital electrode through hole. The electric energy generated by the friction between the polytetrafluoroethylene layer and the first copper interdigital electrode and the second copper interdigital electrode is led out from the first interdigital electrode through hole and the second interdigital electrode through hole by means of a wire, connected to the energy conversion circuit, and injected into the energy storage electrode layer through a conductive slip ring.

9. The triboelectric nanogenerator according to claim 1, characterized in that: The collecting unit also includes a first bearing seat and a second bearing seat, the input shaft can rotatably pass through the first bearing seat and the second bearing seat, the first bearing seat is located at the top of the fixed cylinder and the two are detachably connected, and the second bearing seat is located between the fixed cylinder and the base and is detachably connected to the base.

10. The triboelectric nanogenerator according to claim 9, characterized in that: The first bearing seat and the fixing tube, as well as the second bearing seat and the base are connected by plugging.

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