Double-ball nested water wave energy collecting device

Abstract

The invention provides a double-ball nested water wave energy collecting device which comprises a floater ball shell, an electrode ball is arranged in the floater ball shell, a cambered surface ball is arranged in the electrode ball, the floater ball shell and the electrode ball are both of a hollow structure, and the cambered surface ball is of a solid structure; a plurality of electrodes are connected to the interior of the floater spherical shell, one end of each electrode is connected with a copper sheet, the copper sheets are connected with a wire, and the wire is connected with a rectifier bridge; and the electrode balls and the cambered surface balls are made of PTFE (Polytetrafluoroethylene) materials. According to the invention, the contact area and frequency are increased, the electric energy conversion efficiency is improved, and the durability and stability of the device are improved by optimizing material selection and structural design.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of generators, and in particular to a double-ball nested water wave energy collection device. Background Art

[0002] In today's world, energy demand is growing, and the use of fossil fuels has led to serious environmental problems and resource depletion. Finding sustainable and clean energy sources has become a global focus. Blue energy, or ocean energy, including tidal energy, wave energy, and ocean current energy, is considered to be one of the clean energy sources with great potential. Blue energy uses the hydrodynamics, temperature difference, and salinity difference in the ocean to generate electricity, and has the advantages of being renewable, less polluting, and abundant in resources. In 2012, Academician Wang Zhonglin invented the friction nanogenerator (TENG) that converts tiny mechanical energy into electrical energy, defining it as "energy of the new era" and setting the long-term goal of collecting wave energy to realize the "blue energy" that humans have long dreamed of. The friction electrification phenomenon was first recorded in the 6th century BC. After more than 2,000 years of development and application, this phenomenon has received new attention and utilization in TENG technology. The friction nanogenerator (TENG) is a new type of energy harvesting technology that converts mechanical energy into electrical energy through the triboelectric effect. TENG has the characteristics of simple structure, low manufacturing cost, and high energy conversion efficiency, and is particularly suitable for low-frequency and low-amplitude mechanical energy collection.

[0003] The use of ocean energy is the forefront of current energy research. As a high-energy-density, ubiquitous resource, ocean wave energy has great development potential. However, traditional ocean wave energy development technologies face the challenges of high costs and low economic benefits, which limits their large-scale commercial application. Friction nanogenerators convert mechanical energy into electrical energy through the coupling of friction electrification and electrostatic induction, which makes the collection of ocean wave energy possible, unlike other existing power generation technologies. Summary of the invention

[0004] The present invention mainly provides a double-ball nested water wave energy collection device to solve the technical problems raised in the above background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A double-ball nested water wave energy collection device comprises a float ball shell, an electrode ball is arranged inside the float ball shell, a curved ball is arranged inside the electrode ball, the float ball shell and the electrode ball are both hollow structures, and the curved ball is a solid structure;

[0007] A plurality of electrodes are connected inside the float ball shell, one end of each electrode is connected to a copper sheet, the copper sheet is connected to a wire, and the wire is connected to a rectifier bridge;

[0008] The electrode ball and the arc ball are both made of PTFE material.

[0009] Furthermore, the electrode is a sponge EVA tape, and the electrode is bonded to the inner wall of the float ball shell.

[0010] Furthermore, the outer surfaces of the electrode ball and the arc ball are both provided with aluminum films.

[0011] Furthermore, the arc sphere is formed by 3D printing.

[0012] Furthermore, the float spherical shell includes an upper spherical shell and a lower spherical shell connected to the upper spherical shell, the inner surface of the lower spherical shell is connected to a convex ring, the outer ring surface of the convex ring is bonded with double-sided tape, and the convex ring is connected to the upper spherical shell through the double-sided tape.

[0013] Furthermore, the convex ring is welded to the inside of the lower spherical shell by ultrasonic welding.

[0014] Furthermore, an annular negative pressure tube is welded to the top of the inner ring of the convex ring, and a plurality of negative pressure heads are connected to the outer surface of the annular negative pressure tube. The negative pressure heads penetrate the convex ring, and the plurality of negative pressure heads are arranged in a circular array.

[0015] Furthermore, one end of the annular negative pressure tube is connected to a hose, and one end of the hose passes through the float ball shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention adopts a contact-separation power generation mode. Its structure includes a spherical shell, inner and outer friction electrification balls. When the double-ball nested generator is placed on water waves, it will undergo heave, surge and roll movements near its equilibrium point, causing its relative position with the internal free electrification ball to change. Since the electrifying balls and the metal electrode materials attached to the inner surface of the generator have different polarities (i.e., they have different binding abilities for electrons), the relative movement of the two (contact, collision and rolling) will cause them to carry heterogeneous friction charges, and under the action of electrostatic induction, the electrifying balls will cause a potential difference between the two electrodes, which will drive the friction charges on the two electrodes to move in a directional manner through the external circuit to balance the change in potential difference, thereby realizing the control of wave energy to electrical energy. In this way, the contact area and frequency are increased, the efficiency of electrical energy conversion is improved, and the durability and stability of the device are improved by optimizing material selection and structural design. The outer spherical shell is made of high-strength and corrosion-resistant materials to ensure long-term operation in harsh marine environments. The surface of the inner spherical shell is specially treated to enhance the friction effect and charge transfer efficiency. In addition, the working performance of the device in a low-frequency mechanical energy environment is further improved by rationally designing elastic connections and soft contact components.

[0018] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a double-ball nested generator of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 This is an ideal model diagram of the contact-separation mode TENG of the present invention;

[0022] Figure 4 This is a simulation effect diagram of the comsol potential of the double-ball nested generator of the present invention.

[0023] In the figure: 10, float ball shell; 11, electrode; 12, copper sheet; 13, convex ring; 14, double-sided tape; 15, annular negative pressure tube; 16, negative pressure head; 17, hose; 18, upper ball shell; 19, lower ball shell; 20, electrode ball; 30, arc ball. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] For examples, please refer to the attached Figure 1-4A double-ball nested water wave energy collection device comprises a float ball shell 10, an electrode ball 20 is arranged inside the float ball shell 10, a curved ball 30 is arranged inside the electrode ball 20, the float ball shell 10 and the electrode ball 20 are both hollow structures, and the curved ball 30 is a solid structure;

[0028] A plurality of electrodes 11 are connected inside the float ball shell 10, one end of each electrode 11 is connected to a copper sheet 12, the copper sheet 12 is connected to a wire, and the wire is connected to a rectifier bridge;

[0029] The electrode ball 20 and the arc ball 30 are both made of PTFE material;

[0030] The electrode 11 is a sponge EVA tape, and the electrode 11 is bonded to the inner wall of the float ball shell 10;

[0031] The outer surfaces of the electrode ball 20 and the arc ball 30 are both provided with aluminum films;

[0032] The arc ball 30 is formed by 3D printing;

[0033] It should be noted that, in this embodiment, the power generation principle of TENG in contact-separation mode is as follows Figure 2 As shown. The thickness of the friction layer is d1 and d2, and the relative dielectric constant is ε r0 and ε r2 The distance between the two friction surfaces is Y. When the two materials come into contact, the inner surface will carry a static charge of opposite sign and the same charge density, all of which are σ. When the two friction surfaces begin to separate and Y becomes larger, an induced potential difference E is generated between the two electrodes. This potential difference will drive the electrons between the two electrodes to transfer to the external circuit, and this charge transfer amount is defined as q;

[0034] When the area of ​​the two electrodes is infinite, the formula used to express the real-time power generation performance of TENG is mainly the intrinsic relationship between the voltage between the two electrodes (V), the amount of charge transferred between the electrodes (q), and the distance between the two friction-charged layers (Y). The relationship between VqY in TENG can be derived from the theory of electrodynamics. According to Gauss's theorem, the corresponding electric field intensity in each area can be expressed as:

[0035] Dielectric material 1:

[0036]

[0037] In the air gap:

[0038]

[0039] In dielectric material 2:

[0040]

[0041] The potential difference between the two electrodes is:

[0042] V=E1d1+E2d2+E air x (4)

[0043] VqY relationship:

[0044]

[0045] According to the working principle of the friction nanogenerator, the double-ball nested generator (including a group of nested balls and friction electrification balls) will undergo heave, surge and roll movements near its equilibrium point under wave excitation and mooring, causing its relative position with the internal free electrification ball to change. Since the electrification balls and the metal electrode material attached to the inner surface of the float have different polarities (i.e., they have different binding abilities for electrons), the relative movement of the two (contact, collision and rolling) will cause them to carry heterogeneous friction charges, and under the action of electrostatic induction, the electrification balls will cause a potential difference between the two electrodes, which will drive the friction charges on the two electrodes to move in a directional manner through the external circuit to balance the change in potential difference, thereby realizing the conversion of wave energy into electrical energy. After several contacts between the electrification balls and metal electrodes with different polarities, heterogeneous friction charges will be carried on their surfaces respectively, and the charge saturation will gradually be reached as the number of contacts increases. The overall process is as follows:

[0046] According to the law of conservation of charge, the friction charge on the surface of the electrified ball is equal to the sum of the friction charges of the two electrodes at the bottom. At this time, the potential difference between the two electrodes is zero, and no current is generated in the external circuit. When the electrified ball moves relative to the spherical shell, Figure 4 When the charged ball moves to the position shown in Figure (a), the charge will move from the left electrode to the right electrode through the external circuit under the action of electrostatic induction. Figure 4 (b) Figure and Figure 4 When the ball is in the position (c), the charge will pass through the external circuit, thus realizing the conversion of wave energy into electrical energy. The simulation results corresponding to different positions of the ball are shown in Figure 1. Figure 4 shown.

[0047] For details, please refer to the attached Figure 1 and 2 The float spherical shell 10 includes an upper spherical shell 18 and a lower spherical shell 19 connected to the upper spherical shell 18. The inner surface of the lower spherical shell 19 is connected to a convex ring 13. The outer ring surface of the convex ring 13 is bonded with a double-sided tape 14. The convex ring 13 is connected to the upper spherical shell 18 through the double-sided tape 14.

[0048] The convex ring 13 is welded to the inside of the lower spherical shell 19 by ultrasonic welding;

[0049] An annular negative pressure tube 15 is welded to the top of the inner ring of the convex ring 13, and a plurality of negative pressure heads 16 are connected to the outer surface of the annular negative pressure tube 15. The negative pressure heads 16 are arranged through the convex ring 13, and the plurality of negative pressure heads 16 are arranged in a circular array.

[0050] One end of the annular negative pressure tube 15 is connected to a hose 17, and one end of the hose 17 passes through the float ball shell 10;

[0051] It should be noted that, in this embodiment, the upper spherical shell 18 and the lower spherical shell 19 are connected by welding the convex ring 13 on the lower spherical shell 19 to the upper spherical shell 18, so that the upper spherical shell 18 and the lower spherical shell 19 are connected to form a complete sphere.

[0052] Furthermore, ultrasonic welding is performed to tightly connect the convex ring 13 to the lower spherical shell 19;

[0053] Furthermore, the negative pressure head 16 is attached to the inner wall of the upper spherical shell 18, so that when the inside of the annular negative pressure tube 15 is in a negative pressure state, since the annular negative pressure tube 15 is connected to the negative pressure head 16, at this time, the negative pressure head 16 is adsorbed on the inner wall of the upper spherical shell 18 by means of negative pressure, thereby strengthening the connection between the upper spherical shell 18 and the lower spherical shell 19;

[0054] Furthermore, by providing the hose 17, after the hose 17 is connected to the negative pressure pump, the inside of the annular negative pressure tube 15 connected to the tube body can be negatively pressurized, and two valves are provided on the hose 17 to control the air extraction and air release of the hose 17;

[0055] Furthermore, the double-ball nested generator power generation unit is composed of PTFE balls, aluminum electrodes and 3D printed arc surfaces. By changing the dielectric friction material, surface micro-nano structure, number of inertial balls and arc curvature of the spherical nano-friction generator, the optimal material structure of the spherical nano-friction generator is explored to improve the output performance of the power generation unit. According to the arrangement of the triboelectric properties of commonly used materials, PTFE balls and nylon films are finally selected. The generator sphere is made of a plastic shell as a whole. The inner surface of the large ball uses sponge EVA tape as an electrode. It has a strong ability to lose electrons, and it is sticky and easy to stick to the inner surface of the spherical shell. The copper sheet is used for conductivity to absorb all charges and flow out from the wire. The inner and outer surfaces of the middle small ball are made of PTFE material, and the outer layer is made of aluminum film. It will lose electrons and become positively charged when rubbing against sponge EVA, and the charge will flow back from the external circuit. The inner sphere and the outer surface of the smallest sphere inside it are nested and made with a similar design structure. Finally, the four electrodes are connected to the outside circuit with wires, and the circuit output is obtained outside using a rectifier bridge.

[0056] The signal of the spherical generator's power generation is measured by a multimeter:

[0057] Under the same other conditions, when the two wires of the internal ball are placed on the multimeter, by oscillating the ball and measuring, it is found that the multimeter reading is between 0 and 0.02V.

[0058] Remove the two wires of the inner ball on the multimeter, replace the two wires of the outer ball, oscillate the ball and measure again, and find that the multimeter reading is between 0 and 0.025V.

[0059] The internal small ball is connected in series with the output line of the external large ball. The output voltage obtained by the oscillating small ball is between 0 and 0.05V. Through experiments, it is found that when the nested power generation group outputs, its power conversion efficiency is higher.

[0060] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A double-ball nested water wave energy collection device, comprising a float spherical shell (10), characterized in that: An electrode ball (20) is arranged inside the float ball shell (10), and a curved ball (30) is arranged inside the electrode ball (20); the float ball shell (10) and the electrode ball (20) are both hollow structures, and the curved ball (30) is a solid structure; A plurality of electrodes (11) are connected inside the float ball shell (10), one end of the electrode (11) is connected to a copper sheet (12), the copper sheet (12) is connected to a wire, and the wire is connected to a rectifier bridge; The electrode ball (20) and the arc ball (30) are both made of PTFE material.

2. A double-ball nested water wave energy collection device according to claim 1, characterized in that: The electrode (11) is a sponge EVA tape, and the electrode (11) is bonded to the inner wall of the float ball shell (10).

3. The double-ball nested water wave energy collection device according to claim 1, characterized in that: The outer surfaces of the electrode ball (20) and the arc ball (30) are both provided with aluminum films.

4. The double-ball nested water wave energy collection device according to claim 1, characterized in that: The arc sphere (30) is formed by 3D printing.

5. The double-ball nested water wave energy collection device according to claim 1, characterized in that: The float spherical shell (10) comprises an upper spherical shell (18) and a lower spherical shell (19) connected to the upper spherical shell (18); the inner surface of the lower spherical shell (19) is connected to a convex ring (13); the outer ring surface of the convex ring (13) is bonded with a double-sided tape (14); and the convex ring (13) is connected to the upper spherical shell (18) via the double-sided tape (14).

6. The double-ball nested water wave energy collection device according to claim 1, characterized in that: The convex ring (13) is welded to the interior of the lower spherical shell (19) by ultrasonic welding.

7. The double-ball nested water wave energy collection device according to claim 1, characterized in that: An annular negative pressure tube (15) is welded to the top of the inner ring of the convex ring (13), and a plurality of negative pressure heads (16) are connected to the outer surface of the annular negative pressure tube (15). The negative pressure heads (16) are arranged through the convex ring (13), and the plurality of negative pressure heads (16) are arranged in a circular array.

8. The double-ball nested water wave energy collection device according to claim 1, characterized in that: One end of the annular negative pressure tube (15) is connected to a hose (17), and one end of the hose (17) passes through the float ball shell (10).

Images