Piezoelectric electromagnetic capturing device for ocean wave energy

Abstract

The invention discloses a piezoelectric electromagnetic capturing device for ocean wave energy, which is characterized in that the device generates vibration under the action of wave energy on the surface of seawater to excite a spherical magnet 8-2 in a module 8 to repeatedly swing in a slide way in the module, and the spherical magnet 8-2 impacts round piezoelectric patches 8-1 at two ends of the module and generates power in the moving process; in the repeated movement process of the spherical magnet 8-2, a copper wire wound outside the module can cut a magnetic induction line and generate electricity, when the spherical magnet 8-2 moves, the rectangular magnet 7 can be excited, the rectangular magnet 7 drives the piezoelectric plate II6 to swing back and forth to generate electricity, and in the movement process of the piezoelectric plate II6, the piezoelectric plate I4 can be driven to move together and generate electricity. The invention relates to the field of nano generators, in particular to a piezoelectric electromagnetic capturing device for ocean wave energy. According to the invention, energy conversion can be efficiently carried out under different wave frequencies and intensities; the device is designed to be relatively small; the device is relatively simple in working principle and relatively low in operation and maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of nanogenerators, and in particular to a piezoelectric electromagnetic capture device for ocean wave energy. Background Technology

[0002] With the increasing global demand for renewable energy, ocean wave energy, as a potentially huge energy form, is gradually becoming a research hotspot. Ocean wave energy is not only abundant and widely distributed, but also possesses high density and stability, especially in deep-sea areas far from land, where its utilization advantages are even more pronounced. Compared to traditional wind and solar energy, ocean wave energy has higher energy density and continuity, making it an ideal target for clean energy development. Currently, ocean wave energy capture technologies mainly include mechanical energy harvesters, hydraulic energy harvesters, and air-driven energy harvesters. However, these technologies still face challenges, such as low energy conversion efficiency, difficult equipment maintenance, and high costs. Therefore, how to efficiently capture wave energy while reducing the complexity and maintenance costs of the devices has become one of the core research directions. Research on piezoelectric electromagnetic capture devices for ocean wave energy has significant scientific importance and application prospects. Developing efficient, low-cost, and durable energy capture devices through the integration of multidisciplinary technologies will provide feasible technical solutions for the utilization of ocean wave energy and contribute to the global use of renewable energy. Summary of the Invention

[0003] This invention provides a piezoelectric electromagnetic capture device for ocean wave energy, in order to solve the problems of low energy conversion efficiency, difficult equipment maintenance, and high cost.

[0004] The technical means employed in this invention are as follows: A piezoelectric electromagnetic capture device for ocean wave energy includes a shell, a conical base, a support column, piezoelectric plate I, a connecting block, piezoelectric plate II, a rectangular magnet, and an excitation module; The outer shell is connected and fixed to the conical base by welding; The support column is connected and fixed to the conical base by welding; One end of the piezoelectric element I is connected and fixed to the support column by an interference fit; The connecting block is connected and fixed to the other end of the piezoelectric sheet I by an interference fit; The piezoelectric element II and the connecting block are fixed together by an interference fit; The rectangular magnet is connected and fixed to the other end of the piezoelectric sheet II by adhesive bonding.

[0005] Furthermore, the excitation module is connected and fixed by bolts; The excitation module includes a circular piezoelectric sheet, a spherical magnet, a copper coil, and an excitation module housing; The circular piezoelectric sheet is connected and fixed to the excitation module housing by adhesive bonding; The spherical magnet is fitted into the housing of the excitation module via a sliding track; The copper coil is connected and fixed to the excitation module housing by winding.

[0006] The working principle of the piezoelectric electromagnetic capture device for ocean wave energy described above is as follows: Under the action of seawater waves, the wave energy drives the device to oscillate up and down; the trajectory of the wave is approximately a sine function, and the device needs to satisfy two boundary conditions on the wave surface H(x,t), including motion conditions and energy conservation. ; ; Where Y represents scalar velocity potential energy, and p represents water pressure. Let H represent the density of seawater, and g represent the acceleration due to gravity. When H is 0, the dynamic boundary conditions and motion conditions are expressed as follows: ; .

[0007] Based on the Laplace equation, Y and H(X,t) can be expressed as: ; in Here, ω represents the angular frequency, A represents the wave amplitude, and n represents the number of waves. The force on the device on the wave surface can be expressed as: ; Where m represents the weight of the device. It is expressed as the drag coefficient of water. Indicates the acceleration of the device. Indicates the weight of the device. Indicates the buoyancy of the device; The device floats on the sea surface and is affected by wave energy, causing the device to vibrate. This excites the spherical magnet in the module to swing repeatedly in the slide inside the module. During the movement of the spherical magnet, it will hit the circular piezoelectric plates at both ends of the module and generate electricity. During the repeated movement of the spherical magnet, the copper wire wrapped around the outside of the module will cut the magnetic field lines and generate electricity. When the spherical magnet moves, it will excite the rectangular magnet. The rectangular magnet drives the piezoelectric plate II to swing back and forth to generate electricity. During the movement of piezoelectric plate II, it will drive piezoelectric plate I to move together and generate electricity.

[0008] The advantages of this invention are: the combination of piezoelectric and electromagnetic induction effects allows the two energy conversion mechanisms to complement each other, enabling efficient energy conversion under different wave frequencies and intensities. Piezoelectric materials perform well in dealing with high-frequency, small-amplitude fluctuations, while electromagnetic conversion can effectively capture low-frequency, large-amplitude waves, enhancing the system's adaptability and stability; the device is relatively compact and applicable to a wide range of environments; the working principle is relatively simple, typically not involving complex moving parts, resulting in low operating and maintenance costs. Attached Figure Description

[0009] To more clearly illustrate the present invention and provide a clear understanding of it, the accompanying drawings used in the embodiments will be briefly introduced below. The illustrative examples and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0010] Figure 1 This is a schematic diagram of the overall external structure of the present invention.

[0011] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0012] Figure 3 This is a schematic diagram of the internal structure of the excitation module of the present invention.

[0013] Figure 4 This is a schematic diagram of the motion process of the device under wave action according to the present invention.

[0014] Figure 5 This is a top view of the internal structure of the present invention.

[0015] In the figure: 1-outer shell; 2-conical base; 3-support column; 4-piezoelectric element I; 5-connecting block; 6-piezoelectric element II; 7-rectangular magnet; 8-excitation module; 8-1-circular piezoelectric element; 8-2-spherical magnet; 8-3-copper coil; 8-4-excitation module outer shell. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0017] The following description, in conjunction with the accompanying drawings, further illustrates the detailed content of the present invention and its specific implementation scheme.

[0018] Combination Figures 1-5A piezoelectric electromagnetic capture device for ocean wave energy consists of a shell 1, a conical base 2, a support column 3, a piezoelectric sheet I 4, a connecting block 5, a piezoelectric sheet II 6, a rectangular magnet 7, and an excitation module 8.

[0019] The outer shell 1 is connected and fixed to the conical base 2 by welding, and the welding method ensures the airtightness of the device. The support column 3 is connected and fixed to the conical base 2 by welding to ensure the overall stability of the device; One end of the piezoelectric element I4 is connected and fixed to the support column 3 by an interference fit, so that the piezoelectric element I4 can be fixed horizontally; The connecting block 5 is connected and fixed to the other end of the piezoelectric sheet I4 by an interference fit; One end of the piezoelectric sheet II6 is fixed to the connecting block 5 by an interference fit. The piezoelectric sheet II6 and the piezoelectric sheet I4 are connected and fixed by the connecting block 5 to form a "T" shaped beam. The rectangular magnet 7 is connected and fixed to the other end of the piezoelectric sheet II 6 by adhesive bonding, ensuring that the rectangular magnet 7 drives the piezoelectric sheet II 6 to vibrate; The excitation module 8 is connected and fixed by bolts to ensure that the conical base 2 drives the excitation module 8 to swing. The excitation module includes a circular piezoelectric sheet 8-1, a spherical magnet 8-2, a copper coil 8-3, and an excitation module housing 8-4; The circular piezoelectric sheet 8-1 is connected and fixed to the excitation module housing 8-4 by adhesive bonding; The spherical magnet 8-2 is connected to the excitation module housing 8-4 via a slide rail, allowing the spherical magnet 8-2 to move back and forth within the excitation module housing 8-4. The copper coil 8-3 is connected and fixed to the excitation module housing 8-4 by winding. The working principle of the piezoelectric electromagnetic capture device for ocean wave energy described above is as follows: Under the action of seawater waves, the wave energy drives the device to oscillate up and down; the trajectory of the wave is approximately a sine function, and the device needs to satisfy two boundary conditions on the wave surface H(x,t), including motion conditions and energy conservation. ; ; Where Y represents scalar velocity potential energy, and p represents water pressure. Let H represent the density of seawater, and g represent the acceleration due to gravity. When H is 0, the dynamic boundary conditions and motion conditions are expressed as follows: ; .

[0020] Based on the Laplace equation, Y and H(X,t) can be expressed as: ; in Here, ω represents the angular frequency, A represents the wave amplitude, and n represents the number of waves. The force on the device on the wave surface can be expressed as: ; Where m represents the weight of the device. It is expressed as the drag coefficient of water. Indicates the acceleration of the device. Indicates the weight of the device. Indicates the buoyancy of the device; The workflow of this invention is as follows: The device floats on the sea surface and is affected by wave energy, causing the device to vibrate. At the same time, the spherical magnet 8-2 in module 8 will swing repeatedly in the slide inside the module. During the movement of the spherical magnet 8-2, it will hit the circular piezoelectric plates 8-1 at both ends of the module and generate electricity. During the repeated movement of the spherical magnet 8-2, the copper wire wrapped around the outside of the module will cut the magnetic field lines and generate electricity. When the spherical magnet 8-2 moves, it will excite the rectangular magnet 7. The rectangular magnet 7 will drive the piezoelectric plate II 6 to swing back and forth to generate electricity. During the movement of the piezoelectric plate II 6, it will drive the piezoelectric plate I 4 to move together and generate electricity.

[0021] Finally, it should be noted that specific examples have been used in this invention to illustrate the principles and implementation methods of the invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the invention. Furthermore, various modifications and variations can be made to this invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made to this invention should be included within the scope of protection of this invention.

Claims

1. A piezoelectric electromagnetic capture device for ocean wave energy, characterized in that: The device includes a housing (1), a conical base (2), a support column (3), a piezoelectric element I (4), a connecting block (5), a piezoelectric element II (6), a rectangular magnet (7), and an excitation module (8). The housing (1) is connected and fixed to the conical base (2) by welding, which ensures the sealing of the device's interior. The support column (3) is connected and fixed to the conical base (2) by welding, ensuring the overall stability of the device. One end of the piezoelectric element I (4) is connected and fixed to the support column (3) by interference fit, allowing the piezoelectric element I (4) to be fixed horizontally. The connecting block (5) is connected and fixed to the other end of the piezoelectric sheet I (4) by an interference fit; one end of the piezoelectric sheet II (6) is connected and fixed to the connecting block (5) by an interference fit, and the piezoelectric sheet II (6) and the piezoelectric sheet I (4) are connected and fixed to form a "T" beam by the connection of the connecting block (5); the rectangular magnet (7) is connected and fixed to the other end of the piezoelectric sheet II (6) by adhesive, so as to ensure that the rectangular magnet (7) drives the piezoelectric sheet II (6) to vibrate; the excitation module (8) is connected and fixed by bolts, so as to ensure that the conical base (2) drives the excitation module (8) to swing.

2. The piezoelectric electromagnetic capture device for ocean wave energy according to claim 1, characterized in that: The excitation module includes a circular piezoelectric sheet (8-1), a spherical magnet (8-2), a copper coil (8-3), and an excitation module housing (8-4). The circular piezoelectric sheet (8-1) is glued to the excitation module housing (8-4). The spherical magnet (8-2) is connected to the excitation module housing (8-4) via a sliding track, allowing the spherical magnet (8-2) to move back and forth within the excitation module housing (8-4). The copper coil (8-3) is wound to the excitation module housing (8-4). The device floats on the sea surface and is subjected to wave energy. The device vibrates and excites the spherical magnet (8-2) in the module (8) to swing repeatedly in the slide inside the module. During the movement of the spherical magnet (8-2), it will hit the circular piezoelectric plates (8-1) at both ends of the module and generate electricity. During the repeated movement of the spherical magnet (8-2), the copper wire wrapped around the outside of the module will cut the magnetic field lines and generate electricity. When the spherical magnet (8-2) moves, it will excite the rectangular magnet (7). The rectangular magnet (7) will drive the piezoelectric plate II (6) to swing back and forth to generate electricity. During the movement of the piezoelectric plate II (6), it will drive the piezoelectric plate I (4) to move together and generate electricity.

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