An adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave buoyancy device

Abstract

This invention discloses an adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave buoyancy device, comprising a wave energy harvesting structure and a magnetic frequency modulation piezoelectric electromagnetic composite power generation structure. The wave energy harvesting structure includes an air chamber and an exhaust channel. The magnetic frequency modulation piezoelectric electromagnetic composite power generation structure includes a vortex-induced blunt body, a magnetic frequency modulation structure, and a piezoelectric electromagnetic composite power generation structure. The piezoelectric electromagnetic composite power generation structure includes a cantilever beam, a piezoelectric sheet, and a second permanent magnet. The magnetic frequency modulation structure includes a fixed support, a push rod, a driven rod, a spring, a first permanent magnet, and a coil. When the push rod slides vertically, it drives the driven rod to slide back and forth. The second permanent magnet is located between two first permanent magnets, and the first and second permanent magnets are coaxially arranged when stationary. This invention achieves piezoelectric electromagnetic composite power generation based on the single vibration generated by airflow passing through the vortex-induced blunt body through the integrated design of the vortex-induced blunt body, the magnetic frequency modulation structure, and the piezoelectric electromagnetic composite power generation structure.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wave energy generation, and particularly relates to a self-adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave floating energy device. BACKGROUND

[0002] There are abundant wave energy and water in the ocean, and the wave energy refers to the kinetic energy and potential energy possessed by the ocean surface waves. As an important ocean energy, the ocean wave energy has great development and utilization value. At the same time, the wave energy is the most unstable energy among renewable energies, and the wave energy cannot be produced regularly, and has the characteristics of strong energy but slow speed and periodic change.

[0003] The existing wave energy generation technology can only collect the ocean wave energy in a single direction, and the power generation mode is single piezoelectric power generation or electromagnetic power generation, and the energy conversion efficiency is low, and the converted secondary energy is unstable.

[0004] Based on the above problems, the self-adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave floating energy device is provided, the piezoelectric electromagnetic composite power generation is realized, the unstable ocean wave energy is converted into relatively stable electric energy, and the energy conversion efficiency is improved. SUMMARY

[0005] The purpose of the application is to overcome the shortcomings of the prior art, and provide a self-adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave floating energy device.

[0006] In order to achieve the above purpose, the application adopts the following technical scheme:

[0007] A self-adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave floating energy device, comprising a wave energy collection structure and a magnetic frequency modulation piezoelectric electromagnetic composite power generation structure, the wave energy collection structure is used for converting the ocean wave energy into air kinetic energy;

[0008] The wave energy collection structure comprises a gas chamber and an exhaust passage which are sequentially communicated from bottom to top, and the exhaust passage is used for transmitting the airflow generated by the air kinetic energy to the magnetic frequency modulation piezoelectric electromagnetic composite power generation structure;

[0009] The magnetic frequency modulation piezoelectric electromagnetic composite power generation structure is located in the exhaust passage;

[0010] The magnetic frequency modulation piezoelectric electromagnetic composite power generation structure comprises a vortex excitation bluff body for converting the airflow generated by the air kinetic energy into a vortex street airflow, and a magnetic frequency modulation structure and a piezoelectric electromagnetic composite power generation structure;

[0011] The vortex excitation bluff body is in a cylindrical structure, and the central axis of the vortex excitation bluff body extends along the left-right direction;

[0012] The piezoelectric electromagnetic composite power generation structure is located on the upper part of the vortex-induced blunt body; the piezoelectric electromagnetic composite power generation structure includes a cantilever beam, the upper end of which is fixedly connected to the inner wall of the exhaust channel; piezoelectric plates are symmetrically arranged on the front and rear sides of the upper part of the cantilever beam, and a second permanent magnet is arranged on the lower part of the cantilever beam, the second permanent magnet being symmetrically arranged along the front and rear direction of the cantilever beam;

[0013] The magnetic frequency modulation structure is located on the upper part of the vortex-induced blunt body; the magnetic frequency modulation structure includes a fixed bracket for fixed connection with the inner wall of the exhaust channel, the fixed bracket is provided with a push rod that can slide in the vertical direction and a driven rod that can slide in the front and back direction, and a spring is provided between the top end of the push rod and the fixed bracket;

[0014] Two first permanent magnets are symmetrically arranged at the front and rear ends of the driven rod, and coils are wound on the first permanent magnets;

[0015] A linkage component is provided between the push rod and the driven rod;

[0016] When the push rod slides vertically, it causes the driven rod to slide back and forth.

[0017] The second permanent magnet is located between the two first permanent magnets and is coaxially arranged when the first and second permanent magnets are at rest.

[0018] Preferably, the front end of the second permanent magnet and the corresponding first permanent magnet are arranged in a repulsive configuration with the same poles, and the rear end of the second permanent magnet and the corresponding first permanent magnet are arranged in a attracting configuration with opposite poles.

[0019] Preferably, the linkage component includes a connecting rod, the two ends of which are hinged to a push rod and a driven rod, respectively.

[0020] Preferably, the air chamber includes a main body and an air collecting part fixedly disposed at the top of the main body;

[0021] The outer and inner walls of the main body are both truncated cones with a thinner top and a thicker bottom.

[0022] Both the outer and inner walls of the gas collecting section have a hemispherical structure.

[0023] A connecting column is provided in the middle of the inner side of the air chamber, and an inlet guide plate is coaxially fixed at the bottom end of the connecting column; the inlet guide plate is located at the lower part of the bottom port of the main body, and the outer diameter of the inlet guide plate is larger than the outer diameter of the bottom port of the main body.

[0024] Three partitions are evenly arranged along the circumferential direction on the side wall of the connecting column. The radial outer end of the partition is fixedly connected to the inner side wall of the main body. The lower end face of the partition is attached to and fixedly connected to the top surface of the inlet guide plate.

[0025] Three baffles divide the inner cavity of the air chamber into three separate air chambers. The upper parts of the three separate air chambers are connected, and the lower part of the three separate air chambers, located between the inlet guide plate and the bottom port of the main body, forms the water inlet.

[0026] Preferably, a front baffle is coaxially disposed around the periphery of the main body;

[0027] The bottom end of the front baffle is fixedly connected to the inlet guide plate, and the top end of the front baffle is higher than the bottom port of the main body.

[0028] Preferably, both the outer and inner walls of the front baffle have a frustum-shaped structure that is thinner at the top and thicker at the bottom.

[0029] Preferably, the angle between the generatrix of the outer wall surface and the generatrix of the inner wall surface of the main body and the horizontal plane is α;

[0030] The angle between the generatrix of the outer wall surface and the generatrix of the inner wall surface of the front baffle and the horizontal plane is β.

[0031] Both α and β are 85°.

[0032] Preferably, the top surface of the inlet guide plate has a frustum-shaped structure that is thinner at the top and thicker at the bottom;

[0033] The angle γ between the generatrix of the top surface of the entrance guide plate and the horizontal plane is 10°.

[0034] Preferably, a wave-concentrating plate is provided on the outer wall surface of the front baffle at a position corresponding to the partition;

[0035] The wave-concentrating plate passes through the front baffle and extends radially inward to connect with and be fixedly connected to the corresponding partition.

[0036] The top surface of the wave-concentrating plate is higher than the top surface of the front baffle and lower than the top surface of the main body. The top surface of the wave-concentrating plate has an arc-shaped structure. The bottom surface of the wave-concentrating plate located outside the front baffle is flush with the bottom surface of the front baffle. The bottom surface of the wave-concentrating plate located inside the front baffle is attached to and fixedly connected to the top surface of the entrance guide plate.

[0037] Preferably, a counterweight is coaxially fixed at the bottom end of the inlet guide plate.

[0038] The beneficial effects of this invention are:

[0039] (1) The wave energy harvesting structure in this invention is a three-chamber structure, which can collect wave energy from all directions and has a higher wave energy harvesting efficiency. At the same time, a front baffle is set outside the chamber, and the seawater height is slightly higher than the front baffle. The inlets of the three chambers are completely submerged in the seawater, so that the three chambers are completely sealed. Therefore, when the wave surges towards one of the chambers, the wind energy generated in the chamber will not flow out through the other two chambers.

[0040] (2) In this invention, the wave energy harvesting structure is designed with three wave-gathering plates outside the air chamber. The wave-gathering plates can gather waves more accurately and reduce interference with the waves at the water inlet, thereby improving the wave energy conversion efficiency.

[0041] (3) The present invention utilizes a wave energy harvesting structure to convert ocean wave energy into air kinetic energy, thereby forming an airflow. The airflow passes through the vortex-induced blunt body in the cuboid exhaust channel to achieve high-frequency vortex-induced vibration, realizing the conversion of low-frequency wave excitation into high-frequency vibration, improving energy conversion efficiency, and thus improving energy output.

[0042] (4) This invention integrates the design of a vortex-excited blunt body, a magnetic frequency modulation structure, and a piezoelectric-electromagnetic composite power generation structure. Based on the single vibration generated by the airflow passing through the vortex-excited blunt body, the magnetic frequency modulation structure adjusts the natural frequency of the cantilever beam itself, so that the cantilever beam has different natural frequencies under the excitation of airflow at different speeds. This makes the excitation frequency of the airflow match the natural frequency of the cantilever beam, producing a resonance effect. The piezoelectric-electromagnetic composite power generation structure realizes piezoelectric-electromagnetic composite power generation. The cantilever beam does not directly contact the water flow, and the piezoelectric sheet is only subjected to bidirectional bending deformation force, so the force is uniform and the stability is strong. It avoids the damage of piezoelectric materials caused by the traditional mechanical impact driving method, and avoids the overload effect of wave impact, thus improving the working life of the device.

[0043] (5) This invention changes the stiffness of the cantilever beam by the interaction between the first permanent magnet in the magnetic frequency modulation structure and the second permanent magnet on the cantilever beam, thereby changing the natural frequency of the cantilever beam. The attraction between the permanent magnets will reduce the stiffness of the cantilever beam, thereby reducing the natural frequency of the cantilever beam; the repulsion between the permanent magnets will increase the stiffness of the cantilever beam, thereby increasing the natural frequency of the cantilever beam. The combined effect ultimately changes the natural frequency of the cantilever beam, thereby matching the excitation frequency of the vortex-induced vibration with the natural frequency of the cantilever beam, so that the cantilever beam obtains the maximum amplitude, achieves high power output, and thus improves the energy conversion efficiency. Therefore, this application can adjust the natural frequency of the cantilever beam, so that the cantilever beam can achieve resonance under the drive of airflow at different speeds, thereby converting unstable wave energy into relatively stable electrical energy. Attached Figure Description

[0044] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0045] Figure 1 This is a schematic diagram of the structure of the adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave buoyancy device of the present invention;

[0046] Figure 2 This is a partial cross-sectional view of the adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave buoyancy device of the present invention;

[0047] Figure 3 This is a schematic diagram of the magnetic frequency modulation structure and the piezoelectric electromagnetic composite power generation structure in this invention;

[0048] Figure 4 This is a schematic perspective view of the main body structure in this invention;

[0049] Figure 5 This is a schematic top view of the main body of the present invention;

[0050] Figure 6 yes Figure 5 Sectional view along axis AA;

[0051] Figure 7 This is a schematic diagram of the working principle of the adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave buoyancy device of the present invention.

[0052] in:

[0053] 1-Wave energy harvesting structure, 101-Gas chamber, 102-Cuboid exhaust channel, 103-Main body, 104-Gas collection part, 105-Connecting column, 106-Baffle, 107-Inlet guide plate, 108-Front baffle, 109-Wave concentrator, 110-Counterweight block, 111-Water inlet, 112-Gas distribution chamber;

[0054] 2-Vortex-induced blunt body;

[0055] 3-Magnetic frequency modulation structure, 301-Push rod, 302-Fixed bracket, 303-Driven rod, 304-Connecting rod, 305-First permanent magnet, 306-Spring, 307-Coil;

[0056] 4-Piezoelectric-electromagnetic composite power generation structure, 401-Cantilever beam fixed bracket, 402-Cantilever beam, 403-Piezoelectric sheet, 404-Second permanent magnet. Detailed Implementation

[0057] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0058] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0059] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements of this invention, and do not specifically refer to any component or element in this invention, and should not be construed as limiting this invention.

[0060] In this invention, terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0061] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0062] like Figures 1-2 As shown, an adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave buoyancy device includes a wave energy harvesting structure 1 and a magnetic frequency modulation piezoelectric electromagnetic composite power generation structure. The wave energy harvesting structure 1 is used to convert ocean wave energy into air kinetic energy, and the magnetic frequency modulation piezoelectric electromagnetic composite power generation structure is used to convert the airflow generated by the air kinetic energy into vortex airflow. At the same time, the natural frequency of the cantilever beam is adjusted so that the cantilever beam has a larger amplitude mechanical vibration and uses the mechanical vibration to generate electrical energy.

[0063] The wave energy harvesting structure 1 includes an air chamber 101 and an exhaust channel 102 connected sequentially from bottom to top. The exhaust channel 102 is used to transmit the airflow generated by the kinetic energy of the air to the magnetic frequency modulation piezoelectric electromagnetic composite power generation structure.

[0064] The magnetic frequency modulation piezoelectric electromagnetic composite power generation structure is located in the exhaust channel 102;

[0065] The magnetic frequency modulation piezoelectric electromagnetic composite power generation structure includes a vortex-excited blunt body 2 for converting airflow generated by aerodynamic energy into vortex flow, as well as a magnetic frequency modulation structure 3 and a piezoelectric electromagnetic composite power generation structure 4.

[0066] The vortex-induced blunt body 2 has a cylindrical structure, and the central axis of the vortex-induced blunt body 2 extends in the left and right direction. The vortex-induced blunt body 2 generates a vortex-induced airflow that increases the vibration amplitude of the cantilever beam 402, improves the utilization rate of air kinetic energy in the exhaust channel 102, and thus improves the conversion efficiency of ocean wave energy. The vortex-induced blunt body 2 is fixed to the side wall of the exhaust channel 102 by a threaded connection.

[0067] like Figure 3 As shown, the piezoelectric-electromagnetic composite power generation structure 4 is located on the upper part of the vortex-induced blunt body 2; the piezoelectric-electromagnetic composite power generation structure 4 includes a cantilever beam 402, the upper end of which is fixedly connected to the inner wall of the exhaust channel 102. Specifically, the upper end of the cantilever beam 402 is bolted to the inner wall of the exhaust channel 102 through a cantilever beam fixing bracket 401, which has through holes for bolting; piezoelectric sheets 403 are symmetrically arranged on the front and rear sides of the upper part of the cantilever beam 402, the piezoelectric sheets 403 are cuboid in shape and are bonded to the cantilever beam 402; a second permanent magnet 404 is arranged at the lower part of the cantilever beam 402, the second permanent magnet 404 is symmetrically arranged along the front and rear direction of the cantilever beam 402; the second permanent magnet 404 has a cylindrical structure.

[0068] The magnetic frequency modulation structure 3 is located on the upper part of the vortex-induced blunt body 2. The magnetic frequency modulation structure 3 includes a fixed bracket 302 for fixed connection with the inner wall of the exhaust channel 102. The fixed bracket 302 is provided with a through hole for bolt connection with the inner wall of the exhaust channel 102. The fixed bracket 302 is provided with a push rod 301 that can slide vertically and a driven rod 303 that can slide back and forth. A spring 306 is provided between the top end of the push rod 301 and the fixed bracket 302. Specifically, the push rod 301 is a rectangular rod, and the fixed bracket 302 is provided with a rectangular through hole that slides vertically with the push rod 301. The driven rod 303 has a U-shaped structure and a rectangular cross-section. The fixed bracket 302 is provided with a rectangular through hole that slides back and forth with the left bottom rod of the driven rod 303.

[0069] Two first permanent magnets 305 are symmetrically arranged at the front and rear ends of the driven rod 303. A coil 307 is wound on the first permanent magnet 305. The first permanent magnet has a cylindrical structure. The two first permanent magnets 305 are respectively attached to the right ends of the two parallel side rods of the driven rod 303.

[0070] A linkage assembly is provided between the push rod 301 and the driven rod 303;

[0071] When the push rod 301 slides vertically, it drives the driven rod 303 to slide back and forth.

[0072] The second permanent magnet 404 is located between the two first permanent magnets 305 and the first permanent magnets 305 and the second permanent magnet 404 are coaxially arranged when stationary.

[0073] Preferably, the front end of the second permanent magnet 404 and the corresponding first permanent magnet 305 are arranged with the same poles repelling each other, and the rear end of the second permanent magnet 404 and the corresponding first permanent magnet 305 are arranged with opposite poles attracting each other.

[0074] Preferably, the linkage assembly includes a connecting rod 304, the two ends of which are hinged to a push rod 301 and a driven rod 303, respectively.

[0075] Specifically, hinge holes are provided at both ends of the connecting rod 304, and cylindrical protrusions that cooperate with the corresponding hinge holes are provided on the push rod 301 and the driven rod 303 respectively.

[0076] Specifically, the exhaust channel 102 is in the shape of a hollow cuboid.

[0077] Preferably, the air chamber 101 includes a main body 103 and an air collecting part 104 fixedly disposed at the top of the main body 103;

[0078] like Figures 4-6 As shown, the outer and inner walls of the main body 103 are both frustum-shaped structures that are thinner at the top and thicker at the bottom.

[0079] The outer and inner walls of the gas collecting section 104 are both hemispherical structures.

[0080] A connecting column 105 is provided in the middle of the inner side of the air chamber 101, and an inlet guide plate 107 is coaxially fixed at the bottom end of the connecting column 105; the inlet guide plate 107 is located at the lower part of the bottom port of the main body 103, and the outer diameter of the inlet guide plate 107 is larger than the outer diameter of the bottom port of the main body 103.

[0081] Three partitions 106 are evenly arranged along the circumferential direction on the side wall of the connecting column 105. The radial outer end of the partition 106 is fixedly connected to the inner side wall of the main body 103. The lower end face of the partition 106 is attached to and fixedly connected to the top surface of the inlet guide plate 107. The top surface of the partition 106 is flush with the top surface of the main body 103.

[0082] Three baffles 106 divide the inner cavity of the air chamber 101 into three air distribution chambers 112. The upper parts of the three air distribution chambers 112 are connected, and the area at the lower part of the three air distribution chambers 112 between the inlet guide plate 107 and the bottom port of the main body 103 forms an inlet 111.

[0083] Preferably, a front baffle 108 is coaxially disposed around the periphery of the main body 103;

[0084] The bottom end of the front baffle 108 is fixedly connected to the inlet guide plate 107, and the top end of the front baffle 108 is higher than the bottom port of the main body 103.

[0085] Preferably, the outer and inner walls of the front baffle 108 are both frustum-shaped structures that are thinner at the top and thicker at the bottom.

[0086] Preferred, such as Figure 6 As shown, the angles between the generatrix of the outer wall surface and the generatrix of the inner wall surface of the main body 103 and the horizontal plane are both α.

[0087] The angle between the generatrix of the outer wall surface and the generatrix of the inner wall surface of the front baffle 108 and the horizontal plane is β.

[0088] Both α and β are 85°.

[0089] Setting α to 85° gradually reduces the cross-section of the airflow channel in the air chamber 101, compresses the gas generated by wave surging, forms a high-speed airflow, and increases the flow speed of the gas, thereby improving the wave energy conversion efficiency and power generation efficiency.

[0090] When β is set to 85°, when wave surge is applied to the wave energy harvesting structure 1, the waves can climb up along the wall of the front baffle 108 and enter the interior of the wave energy harvesting structure 1, thus improving the efficiency of wave energy harvesting.

[0091] Preferably, the top surface of the inlet guide plate 107 has a frustum-shaped structure that is thinner at the top and thicker at the bottom;

[0092] like Figure 6 As shown, the angle γ between the generatrix of the top surface of the inlet guide plate 107 and the horizontal plane is 10°, so that the top surface of the inlet guide plate 107 has a certain slope, which is conducive to the seawater at the inlet 111 climbing up along the inlet guide plate 107 and increasing the rate at which the wave surge enters the gas distribution chamber 112.

[0093] Preferably, a wave-concentrating plate 109 is provided on the outer wall surface of the front baffle 108 at a position corresponding to the partition 106;

[0094] The wave-concentrating plate 109 passes through the front baffle 108 and extends radially inward to connect with and be fixedly connected to the corresponding partition 106;

[0095] The top surface of the wave-concentrating plate 109 is higher than the top surface of the front baffle 108 but lower than the top surface of the main body 103. The top surface of the wave-concentrating plate 109 has an arc-shaped structure. The bottom surface of the wave-concentrating plate 109 located outside the front baffle 108 is flush with the bottom surface of the front baffle 108. The bottom surface of the wave-concentrating plate 109 located inside the front baffle 108 is attached to and fixedly connected to the top surface of the inlet guide plate 107.

[0096] The wave-gathering plate 108 can accurately gather waves while reducing interference with waves at the inlet.

[0097] Preferably, a counterweight 110 is coaxially fixed at the bottom end of the inlet guide plate 107. The counterweight 110 allows the wave energy harvesting structure 1 to float on the water surface at a certain height, thereby improving the wave energy conversion efficiency.

[0098] An adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave buoyancy device, the working principle of which is as follows:

[0099] During use, the entire device floats on the water surface. The air chamber 101 has three separate air distribution chambers 112, interconnected at their upper ends. These three chambers can absorb ocean waves from all directions. A front baffle 108 and three wave-concentrating plates 109 are installed around the air chamber 101. The wave-concentrating plates 109 concentrate waves and reduce interference with the waves at the inlet 111. A counterweight 110 is installed at the lower end of the air chamber 101, allowing the wave energy collection structure 1 to float at a certain height on the water surface. In actual use, the water level is slightly higher than the front baffle 108, and the inlets 111 of the three air distribution chambers 112 are completely submerged in seawater, ensuring that all three chambers 112 are completely sealed. Therefore, when waves surge towards one of the air distribution chambers 112, the resulting airflow will not flow out through the other two chambers 112.

[0100] As the waves rise and fall on the sea surface, the water level in the air chamber 101 moves up and down with the waves. The air in the air distribution chamber 112 is expelled or drawn in as the water level rises and falls, generating airflow. The airflow flows through the air collection part 104 and enters the cuboid exhaust channel 102, so that the vortex-induced blunt body 2, the magnetic frequency modulation structure 3, and the piezoelectric electromagnetic composite power generation structure 4 are in the flow field.

[0101] The airflow generated by wave energy harvesting structure 1 has unstable characteristics, specifically, the airflow velocity changes continuously. The airflow with different velocities will change the natural frequency of the cantilever beam through the magnetic frequency modulation structure 3. The specific implementation process is as follows:

[0102] like Figure 7As shown, due to the Karman vortex street effect, when the airflow passes through the vortex-excited blunt body 2, vortices with opposite rotation directions and arranged in a regular double row will periodically fall off from both sides of the vortex-excited blunt body 2, thereby causing the cantilever beam 402 to vibrate. When the cantilever beam 402 vibrates, it compresses the piezoelectric plates 403 fixed on both sides of the cantilever beam 402 to generate electricity. At the same time, when the cantilever beam 402 vibrates, the second permanent magnet 404 on the cantilever beam 402 will interact with the first permanent magnet 305 on the magnetic frequency modulation structure 3. Due to Faraday's law of electromagnetic induction, the coil 307 It will cut magnetic field lines, causing a change in magnetic flux, and thus generate electromagnetic power. At the same time, the airflow generated by the kinetic energy of the air in the air chamber 101 will push the rectangular plate at the front end of the push rod 301, causing the push rod 301 to move vertically. As the push rod 301 moves vertically, it will drive the connecting rod 304 to move, and the connecting rod 304 will drive the driven rod 303 to move back and forth. As a result, the two first permanent magnets 305 at the lower end of the driven rod 303 will move back and forth with the movement of the driven rod 303.

[0103] Due to the Karman vortex street effect, the cantilever beam 402 is in a state of vibration at this time, and the second permanent magnet 404 on the cantilever beam 402 is also in a state of vibration. The distance between the first permanent magnet 305 at the lower end of the driven rod 303 and the second permanent magnet 404 on the cantilever beam 402 is constantly changing, and the permanent magnets are constantly interacting with each other. The attraction between the rear end of the second permanent magnet 404 and the corresponding first permanent magnet 305 reduces the stiffness of the cantilever beam 402, thereby lowering its natural frequency. Conversely, the repulsive force between the front end of the second permanent magnet 404 and the corresponding first permanent magnet 305 increases the stiffness of the cantilever beam 402, thus increasing its natural frequency. This dual effect ultimately alters the overall stiffness of the cantilever beam 402, thereby changing its natural frequency. This allows the excitation frequency of the vortex-induced vibration to match the natural frequency, achieving a resonance effect and significantly increasing the vibration amplitude of the cantilever beam 402. The greater the vibration amplitude of the cantilever beam 402, the higher the power generation, thus realizing the efficient conversion of mechanical energy into electrical energy.

[0104] This invention can be used to power small devices on the ocean that require continuous power for extended periods.

[0105] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0106] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are not intended to limit the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. An adaptive variable wind speed magnetic frequency modulation piezoelectric electromagnetic wave energy device, comprising a wave energy collection structure and a magnetic frequency modulation piezoelectric electromagnetic composite power generation structure, the wave energy collection structure is used for converting ocean wave energy into air kinetic energy; characterized in that, the wave energy collection structure comprises a gas chamber and an exhaust passage connected in sequence from bottom to top, the exhaust passage is used for transmitting the airflow generated by the air kinetic energy to the magnetic frequency modulation piezoelectric electromagnetic composite power generation structure; the magnetic frequency modulation piezoelectric electromagnetic composite power generation structure is located in the exhaust passage; the magnetic frequency modulation piezoelectric electromagnetic composite power generation structure comprises a vortex excitation bluff body for converting the airflow generated by the air kinetic energy into a vortex street airflow, and a magnetic frequency modulation structure and a piezoelectric electromagnetic composite power generation structure; the vortex excitation bluff body is in a cylindrical structure, and the central axis of the vortex excitation bluff body extends along the left-right direction; the piezoelectric electromagnetic composite power generation structure is located at the upper part of the vortex excitation bluff body; the piezoelectric electromagnetic composite power generation structure comprises a cantilever beam, the upper end of the cantilever beam is fixedly connected with the inner side wall of the exhaust passage; piezoelectric sheets are symmetrically arranged on the front and back sides of the upper part of the cantilever beam, a second permanent magnet is arranged at the lower part of the cantilever beam, and the second permanent magnet is symmetrically arranged along the front and back directions of the cantilever beam; the magnetic frequency modulation structure is located at the upper part of the vortex excitation bluff body; the magnetic frequency modulation structure comprises a fixed support for fixedly connecting with the inner side wall of the exhaust passage, a push rod capable of vertically sliding and a driven rod capable of front and back sliding are arranged on the fixed support, and a spring is arranged between the top end of the push rod and the fixed support; two first permanent magnets are symmetrically arranged at the front and back ends of the driven rod, and coils are wound on the first permanent magnets; a linkage assembly is arranged between the push rod and the driven rod; the airflow generated by the air kinetic energy in the gas chamber causes the push rod to displace in the vertical direction, and the push rod drives the driven rod to slide forward and backward when the push rod vertically slides; the second permanent magnet and the first permanent magnet interact with each other to change the natural frequency of the cantilever beam itself, so that the excitation frequency of the vortex excitation vibration matches the natural frequency, thereby achieving a resonance effect; the second permanent magnet is located between the two first permanent magnets and coaxially arranged with the first permanent magnet and the second permanent magnet when they are stationary.

2. The self adaptive variable wind speed magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 1, wherein, the front side end of the second permanent magnet is arranged with the corresponding first permanent magnet in the same pole repulsion arrangement, and the back side end of the second permanent magnet is arranged with the corresponding first permanent magnet in the different pole attraction arrangement.

3. The self adaptive variable wind speed magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 1, wherein, the linkage assembly comprises a connecting rod, and the two ends of the connecting rod are respectively hinged with the push rod and the driven rod.

4. The self adaptive variable wind speed magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 1, wherein, the gas chamber comprises a main body part and a gas collecting part fixedly arranged at the top end of the main body part; the outer wall surface and the inner wall surface of the main body part are both in a circular truncated cone structure with a small top and a large bottom; the outer wall surface and the inner wall surface of the gas collecting part are both in a hemispherical structure; a connecting column is arranged in the middle of the inner side of the gas chamber, the bottom end of the connecting column is coaxially fixedly arranged with an inlet guide plate; the inlet guide plate is located at the lower part of the bottom port of the main body part, and the outer diameter of the inlet guide plate is greater than the outer diameter of the bottom port of the main body part; three partition plates are uniformly arranged on the side wall of the connecting column in the circumferential direction, the radially outer end of the partition plate is fixedly connected with the inner side wall of the main body part, and the lower end surface of the partition plate is fixedly connected with the top surface of the inlet guide plate. Three partitions divide the inner cavity of the air chamber into three sub-chambers, upper portions of the three sub-chambers are communicated, and the area between the inlet guide plate and the bottom port of the main body in the lower portion of the three sub-chambers forms a water inlet.

5. The self adaptive variable wind speed magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 4, wherein, The outer periphery of the main body is coaxially provided with a front baffle; The bottom end of the front baffle is fixedly connected with the inlet guide plate, and the top end of the front baffle is higher than the bottom port of the main body.

6. The self adaptive variable wind velocity magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 5, wherein, The outer wall surface and the inner wall surface of the front baffle are both in the circular truncated cone structure with the top thin and the bottom thick.

7. The self adaptive variable wind velocity magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 6, wherein, The included angle between the generatrix of the outer wall surface and the generatrix of the inner wall surface of the main body and the horizontal plane is α; The included angle between the generatrix of the outer wall surface and the generatrix of the inner wall surface of the front baffle and the horizontal plane is β; Both α and β are 85°.

8. The self adaptive variable wind speed magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 4, wherein, The top surface of the inlet guide plate is in the circular truncated cone structure with the top thin and the bottom thick. The included angle γ between the generatrix of the top surface of the inlet guide plate and the horizontal plane is 10°.

9. The self adaptive variable wind velocity magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 5, wherein, The wave converging plate is arranged on the outer wall surface of the front baffle at a position corresponding to the partition; The wave converging plate extends radially inward after passing through the front baffle to be in contact with and fixedly connected with the corresponding partition; The top surface of the wave converging plate is higher than the top surface of the front baffle and lower than the top surface of the main body, and the top surface of the wave converging plate is in the arc surface structure; the bottom surface of the wave converging plate on the outer side of the front baffle is flush with the bottom surface of the front baffle, and the bottom surface of the wave converging plate on the inner side of the front baffle is in contact with and fixedly connected with the top surface of the inlet guide plate.

10. The self adaptive variable wind speed magnetic force frequency modulated piezoelectric electromagnetic wave energy buoyant device of claim 4, wherein, The bottom end of the inlet guide plate is coaxially fixedly provided with a counterweight.

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