A wobble ball type frictional nanogenerator array

Abstract

The application discloses a swing ball type friction nanogenerator array, which comprises a support structure, a floating platform, an iron block, a swing structure and a friction nanogenerator. The friction nanogenerator has 12 60-degree sector copper electrodes which are evenly pasted in upper and lower hollow spherical shells, and gaps are left between different electrodes; adjacent copper electrodes belong to positive and negative poles of a power supply respectively; the upper and lower spherical shells are sealed and waterproofed by silicone glue. Part of the inner spherical surface is taken to form a movable dielectric shape, and the movable dielectric is filled with silica gel in the inside and covered with a PTFE film in the outside. The swing structure is formed by connecting the support structure and the friction nanogenerator by a spring; the friction nanogenerator is vertically and evenly distributed under the support structure to form an array. Finally, the iron block is tied to the bottom of the floating platform by a nylon rope to lower the gravity center of the structure. The application has the advantages of excellent power generation performance, high energy conversion efficiency, simple preparation method and low cost.

Description

Technical Field

[0001] This invention relates to the field of ocean energy power generation technology, and in particular to a oscillating spherical triboelectric nanogenerator array. Background Technology

[0002] With rapid global population growth and the depletion of traditional energy resources, the global energy crisis is becoming increasingly severe. The oceans, covering 71% of the Earth's surface, possess enormous ocean energy and are a crucial source for developing clean and renewable energy, with ocean wave energy being one of its main forms. Large-scale harvesting of ocean energy using traditional electromagnetic induction generators presents numerous challenges, primarily due to the low frequency, wide distribution, random wave peaks, and high cost of the energy generated by ocean waves. In recent years, triboelectric nanogenerators, with their high power density and high energy conversion efficiency at low frequencies, have been increasingly developed as a typical application for converting various forms of environmental mechanical energy into electrical energy, thus becoming a solution for capturing wave energy. Existing devices can already capture wave energy and convert it into electricity.

[0003] Due to the unpredictability of waves in real ocean environments, an ideal wave energy harvester should be durable, sensitive to low-frequency, low-amplitude waves, and capable of capturing omnidirectional wave energy for practical application in natural marine environments. One strategy is to use spherical or arc-shaped TENG structures to capture omnidirectional wave energy, utilizing small spheres as rolling media and leveraging their high degree of rolling freedom to respond to waves in different directions. However, the small contact area of ​​the rolling spheres leads to a significant drop in output performance, and there are still performance disadvantages in some directions, making it difficult to truly achieve omnidirectional energy capture, thus greatly reducing energy capture efficiency. Therefore, how to achieve isotropic energy capture and improve output performance is a key problem that needs to be solved. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a oscillating spherical triboelectric nanogenerator array, which is beneficial for increasing the friction area between the electrodes and the dielectric, improving energy conversion efficiency and output stability, while simplifying the device structure and reducing manufacturing costs.

[0005] To achieve the above objectives, the present invention provides an array of oscillating spherical triboelectric nanogenerators, comprising a support structure, a floating platform, an iron block, an oscillating structure, and a triboelectric nanogenerator.

[0006] The triboelectric nanogenerator contains 12 60-degree sector-shaped copper electrodes, evenly attached to the upper and lower hollow spherical shells. Gaps are left between the electrodes, and adjacent copper electrodes belong to the positive and negative poles of the power source, respectively. The upper and lower spherical shells are sealed with silicone sealant for waterproofing. A portion of the inner spherical surface is cut to form the shape of a movable dielectric, significantly increasing the frictional area between the electrodes and the dielectric. The movable dielectric is filled with silicone and covered with a PTFE film to increase its weight while maintaining the polarity difference between the dielectric and the electrodes.

[0007] The oscillating structure consists of a spring-connected support structure and a triboelectric nanogenerator, enabling the nanogenerator to capture low-frequency wave energy while ensuring efficient transfer of mechanical energy. The triboelectric nanogenerators are evenly distributed below the support structure, forming an array. Finally, iron blocks are secured to the bottom of the floating platform with nylon ropes to lower the structure's center of gravity and prevent tipping.

[0008] Compared with existing technologies, the oscillating spherical triboelectric nanogenerator array proposed in this invention has the following beneficial technical effects:

[0009] First, a portion of the inner spherical surface is cut to form the shape of a movable dielectric. This measure allows the electrode and the dielectric to be in complete contact, improving the efficiency of converting mechanical energy into electrical energy. The movable dielectric is filled with silicone and covered with a PTFE film on the outside, which can increase the weight of the dielectric while ensuring the polarity difference between the dielectric and the electrode.

[0010] Secondly, the suspended swing structure, which consists of a spring-connected support structure and a triboelectric nanogenerator, allows the triboelectric nanogenerator to capture low-frequency wave energy and reduces the loss of mechanical energy during movement.

[0011] Third, the use of cylindrical floating platforms and suspended oscillating structures enables triboelectric nanogenerators to capture wave energy in an omnidirectional and isotropic manner. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of the triboelectric nanogenerator in this invention;

[0014] Figure 3 This is a schematic diagram of the structure of the mobile dielectric in this invention.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Support structure; 11. Support structure crossbar; 12. Support column; 2. Spring; 3. Triboelectric nanogenerator; 31. Copper electrode; 32. Spherical shell; 4. Floating platform; 5. Nylon rope; 6. Iron block; 7. Movable dielectric. Detailed Implementation

[0017] like Figure 1 As shown, this invention proposes a oscillating spherical triboelectric nanogenerator array, comprising a support structure 1, a floating platform 4, an iron block 6, an oscillating structure, and a triboelectric nanogenerator 3, characterized in that:

[0018] (1) Twelve 60-degree sector-shaped copper electrodes 31 are evenly pasted inside a hollow spherical shell 32 made of kapton material. The size of the gap between different copper electrodes 31 is 0.5-3mm. Adjacent copper electrodes 31 belong to the positive and negative poles of the power supply, respectively.

[0019] (2) Use silicone sealant to seal and waterproof the spherical shell 32 with a diameter of 50-150mm.

[0020] (3) Cut off part of the inner spherical surface to form the shape of the movable dielectric 7. Its maximum circular cross-sectional diameter is 5-30mm. Fill the interior of the movable dielectric 7 with silicone and cover the outer layer with PTFE film so that the copper electrode 31 and the contact surface of the movable dielectric 7 are completely attached.

[0021] (4) The swing structure is composed of a spring 2 with a length of 15-35mm connecting the support structure crossbar 11 and the triboelectric nanogenerator 3. Four triboelectric nanogenerators 3 are evenly distributed under the support structure crossbar 1 to form an array.

[0022] (5) The height of the support column 12 is 150-210mm; the floating platform structure 4 is a cylindrical shell with a circular cross-section diameter of 300-600mm, and the material used for manufacturing is HDPE.

[0023] (6) An iron block 6 with a mass of 100-500g is tied to the center of the bottom of the floating platform 4 with a nylon rope 5 to prevent it from tipping over; the outer layer of the iron block 6 is coated with resin-based paint to prevent rusting in seawater.

[0024] Unless otherwise specified, all raw materials used in this invention are commercially available products well known to those skilled in the art.

[0025] In this invention, the preferred size of the gap between the different copper electrodes 31 is 1 mm.

[0026] In this invention, the hollow spherical shell 32 made of kapton material has a preferred diameter of 100 mm.

[0027] In this invention, the preferred movable dielectric 7 has a maximum circular cross-sectional diameter of 20 mm, is filled with silicone, and is covered with a PTFE film.

[0028] In this invention, the spring 2 constituting the swing structure is preferably 30mm long and is used to connect the crossbar 11 of the support structure and the triboelectric nanogenerator 3.

[0029] In this invention, the preferred length of the support rod 12 is 170 mm, and the diameter of the circular cross-section of the floating platform 4 is 400 mm.

[0030] In this invention, the preferred weight of the iron block 6 attached to the center of the bottom of the floating platform 4 is 300g.

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and do not constitute a limitation thereof. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] (1) Twelve 60-degree sector-shaped copper electrodes 31 are evenly pasted inside a hollow spherical shell 32 made of kapton material. The gap between different copper electrodes 31 is 0.5 mm. Adjacent copper electrodes 31 belong to the positive and negative poles of the power supply, respectively.

[0034] (2) Use silicone sealant to seal and waterproof the spherical shell 32 with a diameter of 50 mm.

[0035] (3) A portion of the inner spherical surface is cut off to form the shape of the movable dielectric 7. The maximum diameter of its circular cross-section is 5mm. The interior of the movable dielectric 7 is filled with silicone and covered with a PTFE film on the outside, so that the copper electrode 31 and the contact surface of the movable dielectric 7 are completely attached.

[0036] (4) The swing structure is composed of a spring 2 with a length of 15mm connecting the support structure crossbar 11 and the triboelectric nanogenerator 3. Four triboelectric nanogenerators 3 are evenly distributed under the support structure crossbar 1 to form an array.

[0037] (5) The height of the support column 12 is 150mm; the floating platform structure 4 is a cylindrical shell with a circular cross-section diameter of 300mm, and the material used for manufacturing is HDPE.

[0038] (6) A 150g iron block 6 is tied to the center of the bottom of the floating platform 4 with a nylon rope 5 to prevent it from tipping over; the outer layer of the iron block 6 is coated with resin-based paint to prevent rusting in seawater.

[0039] Example 2

[0040] (1) Twelve 60-degree sector-shaped copper electrodes 31 are evenly pasted inside a hollow spherical shell 32 made of kapton material. The gap between different copper electrodes 31 is 1 mm. Adjacent copper electrodes 31 belong to the positive and negative poles of the power supply, respectively.

[0041] (2) Use silicone sealant to seal and waterproof the spherical shell 32 with a diameter of 100mm.

[0042] (3) A portion of the inner spherical surface is cut off to form the shape of the movable dielectric 7. The maximum diameter of its circular cross-section is 10 mm. The interior of the movable dielectric 7 is filled with silicone and covered with a PTFE film on the outside, so that the copper electrode 31 and the contact surface of the movable dielectric 7 are completely attached.

[0043] (4) The swing structure is composed of a spring 2 with a length of 20mm connecting the support structure crossbar 11 and the triboelectric nanogenerator 3. Four triboelectric nanogenerators 3 are evenly distributed under the support structure crossbar 1 to form an array.

[0044] (5) The height of the support column 12 is 170mm; the floating platform structure 4 is a cylindrical shell with a circular cross-section diameter of 400mm, and the material used for manufacturing is HDPE.

[0045] (6) A 300g iron block 6 is tied to the center of the bottom of the floating platform 4 with a nylon rope 5 to prevent it from tipping over; the outer layer of the iron block 6 is coated with resin-based paint to prevent rusting in seawater.

[0046] Example 3

[0047] (1) Twelve 60-degree sector-shaped copper electrodes 31 are evenly pasted inside a hollow spherical shell 32 made of kapton material. The gap between different copper electrodes 31 is 2mm. Adjacent copper electrodes 31 belong to the positive and negative poles of the power supply, respectively.

[0048] (2) Use silicone sealant to seal and waterproof the spherical shell 32 with a diameter of 125mm.

[0049] (3) A portion of the inner spherical surface is cut off to form the shape of the movable dielectric 7. The maximum diameter of its circular cross-section is 20 mm. The interior of the movable dielectric 7 is filled with silicone and covered with a PTFE film on the outside, so that the copper electrode 31 and the contact surface of the movable dielectric 7 are completely attached.

[0050] (4) The swing structure is composed of a spring 2 with a length of 30mm connecting the support structure crossbar 11 and the triboelectric nanogenerator 3. Four triboelectric nanogenerators 3 are evenly distributed under the support structure crossbar 1 to form an array.

[0051] (5) The height of the support column 12 is 190mm; the floating platform structure 4 is a cylindrical shell with a circular cross-section diameter of 500mm, and the material used for manufacturing is HDPE.

[0052] (6) A 450g iron block 6 is tied to the center of the bottom of the floating platform 4 with a nylon rope 5 to prevent it from tipping over; the outer layer of the iron block 6 is coated with resin-based paint to prevent rusting in seawater.

[0053] Example 4

[0054] (1) Twelve 60-degree sector-shaped copper electrodes 31 are evenly pasted inside a hollow spherical shell 32 made of kapton material. The gap between different copper electrodes 31 is 3mm. Adjacent copper electrodes 31 belong to the positive and negative poles of the power supply, respectively.

[0055] (2) Use silicone sealant to seal and waterproof the spherical shell 32 with a diameter of 150mm.

[0056] (3) A portion of the inner spherical surface is cut off to form the shape of the movable dielectric 7. The maximum diameter of its circular cross-section is 30 mm. The interior of the movable dielectric 7 is filled with silicone and covered with a PTFE film on the outside, so that the copper electrode 31 and the contact surface of the movable dielectric 7 are completely attached.

[0057] (4) The swing structure is composed of a spring 2 with a length of 35mm connecting the support structure crossbar 11 and the triboelectric nanogenerator 3. Four triboelectric nanogenerators 3 are evenly distributed under the support structure crossbar 1 to form an array.

[0058] (5) The height of the support column 12 is 210mm; the floating platform structure 4 is a cylindrical shell with a circular cross-section diameter of 600mm, and the material used for manufacturing is HDPE.

[0059] (6) A 500g iron block 6 is tied to the center of the bottom of the floating platform 4 with a nylon rope 5 to prevent it from tipping over; the outer layer of the iron block 6 is coated with resin-based paint to prevent rusting in seawater.

Claims

1. A pendulum-shaped triboelectric nanogenerator array, comprising a support structure, a floating platform, an iron block, a pendulum structure, and a triboelectric nanogenerator, characterized in that: The triboelectric nanogenerator contains 12 60-degree sector-shaped copper electrodes, evenly attached to the upper and lower hollow spherical shells, with gaps between different electrodes. Adjacent copper electrodes belong to the positive and negative poles of the power source, respectively. The upper and lower spherical shells are sealed with silicone sealant for waterproofing. A portion of the inner spherical surface is cut to form the shape of a movable dielectric, which is filled with silicone and covered with a PTFE film. The oscillating structure consists of a spring connecting a support structure crossbar and the triboelectric nanogenerator. The triboelectric nanogenerator is evenly distributed under the support structure crossbar, forming an array. The iron block is tied to the center of the bottom of the floating platform by nylon rope.

2. The oscillating spherical triboelectric nanogenerator array according to claim 1, characterized in that: The electrodes are made of copper, and the gap between different electrodes is 0.5-3mm.

3. The oscillating spherical triboelectric nanogenerator array according to claim 1, characterized in that: The hollow spherical shells are made of kapton and have a radius of 50-150 mm.

4. The oscillating spherical triboelectric nanogenerator array according to claim 1, characterized in that: The spring used in the swing structure is made of high carbon steel and has a length of 15-35mm.

5. The oscillating spherical triboelectric nanogenerator array according to claim 1, characterized in that: The floating platform structure is a cylindrical hollow shell, manufactured using HDPE material, with a diameter of 300-600mm.

6. The oscillating spherical triboelectric nanogenerator array according to claim 1, characterized in that: The iron block weighs 100-500g and is coated with resin-based paint on the outside.

7. The application of the oscillating spherical triboelectric nanogenerator array according to any one of claims 2-6 in ocean energy power generation devices.

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