Flapping wing type water flow power generation device

Abstract

The invention discloses a flapping wing type water flow power generation device which comprises a box body, a flapping wing mechanism, an input shaft, a transmission mechanism, an elastic structure, a permanent magnet and a coil, and the input shaft partially extends into the box body and is connected with the first elastic structure and the permanent magnet through the transmission mechanism. In the axial direction of the output shaft of the transmission mechanism, the permanent magnet is located between the elastic structure and the coil and installed on the inner wall of the box body. The flapping wing mechanism is located on the outer side of the box body and connected with the input shaft. The side, away from the input shaft, of the flapping wing mechanism swings around the axis of the input shaft and is used for driving the input shaft to rotate synchronously. According to the power generation device, the flapping wing mechanism drives the input shaft to rotate, so that the elastic potential energy of the elastic structure is continuously increased. When the elastic potential energy reaches a preset range, the elastic mechanism releases the stored elastic potential energy together to drive the permanent magnet to rotate so as to generate a high-power alternating current electric signal, and therefore the capacity of the power generation device for obtaining and converting energy of low-flow-speed water flow is improved.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a flapping-wing water flow power generation device. Background Art

[0002] Water resources are an abundant and stable renewable energy source. They are an irreplaceable basic natural resource for maintaining the balance of the earth's ecosystem and supporting social and economic development.

[0003] Hydropower generation is an effective way to utilize water resources. Currently, hydropower generation mostly uses the kinetic energy generated by the high-speed movement of rivers and lakes from high places to low places, which is converted into mechanical energy through turbines to drive power supply equipment to generate electricity. However, when the water flow is at a low flow rate, it is difficult for power supply equipment to achieve the conversion from kinetic energy to electrical energy, which will lead to a waste of renewable resources.

[0004] Therefore, how to improve the ability of power supply equipment to obtain and convert energy from low-flow water to improve the utilization rate of water resources has become a difficult problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0005] The present application provides a flapping-wing water flow power generation device for improving the ability to obtain and convert energy from water flow, thereby effectively improving the utilization rate of water resources.

[0006] The present application provides a flapping-wing water flow power generation device for fluid power generation, which includes a box, a flapping-wing mechanism, an input shaft, a transmission mechanism, a first elastic structure, a permanent magnet and a coil, wherein the transmission mechanism, the first elastic structure, the permanent magnet and the coil are located inside the box. Part of the input shaft extends into the box and is connected to the first elastic structure through the transmission mechanism; the first elastic structure is connected to the permanent magnet. And along the axial direction of the output shaft of the transmission mechanism, the permanent magnet is located between the first elastic structure and the coil. The coil is installed on the inner wall of the box. The flapping-wing mechanism is located outside the box and is connected to the input shaft. The side of the flapping-wing mechanism away from the input shaft swings around the axis of the input shaft to drive the input shaft to rotate synchronously. The first elastic structure drives the permanent magnet to rotate around the axis of the output shaft of the transmission mechanism by storing or releasing elastic potential energy.

[0007] With the flapping-wing water flow power generation device provided by the present application, in the process of the flapping-wing mechanism driving the input shaft to rotate, the first elastic structure is acted upon by an external force, and the elastic potential energy inside it will continue to increase, thereby realizing the storage of the elastic potential energy. When the value of the elastic potential energy stored in the first elastic structure reaches a preset range, the first elastic mechanism will release the stored elastic potential energy together, and drive the permanent magnet to rotate around the axis of the output shaft of the transmission mechanism, so as to quickly cut the magnetic flux lines and generate a high-power AC signal, thereby effectively improving the ability to obtain and convert energy from low-velocity water flows, and improving the utilization rate of water resources.

[0008] In a possible implementation of the present application, the flapping-wing mechanism includes a connecting rod and a flapping-wing body, and the flapping-wing body is connected to the input shaft through the connecting rod; the extension surface of the wing section of the flapping-wing body intersects with the axial direction of the input shaft. Along the direction of the wing section that passes through the flapping-wing body, the end of the flapping-wing body is rotatably connected to the connecting rod. When the flapping-wing body swings from the first state to the second state around the axis of the end of the flapping-wing body, the input shaft rotates along the first direction, the first elastic structure stores elastic potential energy, and the permanent magnet is stationary relative to the axis of the output shaft of the transmission mechanism. When the flapping-wing body swings from the second state to the first state around the axis of the end of the flapping-wing body, the input shaft rotates along the second direction, and the first elastic structure drives the permanent magnet to rotate around the axis of the output shaft of the transmission mechanism by storing or releasing elastic potential energy. The first direction is opposite to the second direction.

[0009] Using the flapping-wing water flow power generation device provided by the present application, during the operation of the flapping-wing water flow power generation device, when the water flow hits the side wall of the flapping-wing body, the flapping-wing body can swing around the axis of the end of the flapping-wing body to drive the input shaft to rotate. And by specifying the corresponding relationship between the rotation direction of the input shaft and the storage or release of elastic potential energy of the first elastic structure, the storage of the elastic potential energy of the first elastic structure is maximized. When the first elastic structure releases the elastic potential energy, the first elastic structure drives the permanent magnet to rotate rapidly around the axis of the output shaft of the transmission mechanism to generate a high-power AC signal, thereby effectively improving the ability to obtain and convert energy from low-flow water flow and improving the utilization rate of water resources.

[0010] In a possible implementation of the present application, the flapping wing body includes a wave surface, and the wave surface is located between the axis of the end of the flapping wing body and the input shaft. This can effectively increase the contact area between the water flow and the wave surface, as well as the adaptability of the flapping wing body to water flows of different flow rates, and effectively improve the rotation efficiency of the flapping wing body.

[0011] In a possible implementation of the present application, the rotation angle of the flapping wing body relative to the connecting rod is α, and α satisfies: -60°≤α≤60°. This is used to effectively reduce the risk that the flapping wing body cannot achieve autonomous swing under the impact force of the water flow when the flapping wing body is swinging under the impact force of the water flow.

[0012] In a possible implementation of the present application, the connecting rod includes two stoppers, the two stoppers are arranged opposite to each other, and at least a portion of the flapping wing body is located between the two stoppers. When the flapping wing body rotates relative to the connecting rod, the flapping wing body is used to abut against the stoppers. In this way, when the flapping wing body rotates relative to the connecting rod, the flapping wing body can be used to abut against the stoppers to limit the swing angle of the flapping wing body relative to the connecting rod, while satisfying the requirement that the flapping wing body drives the input shaft to continuously change its rotation direction, simplifying the structure of the flapping wing type water flow power generation device.

[0013] In a possible implementation of the present application, the transmission mechanism includes a first transmission part and a second transmission part, and the input shaft is connected to the output shaft through the first transmission part; one end of the output shaft is connected to one end of the first elastic structure. The output shaft is rotationally connected to the second transmission part. The input shaft is connected to the other end of the first elastic structure through the second transmission part. When the input shaft rotates in the first direction, the movement of the first transmission part drives the output shaft to rotate in the second direction, and the first elastic structure stores elastic potential energy. When the input shaft rotates in the second direction, the second transmission part moves, the output shaft is stationary, and the first elastic structure stores or releases elastic potential energy. And the first transmission part and the second transmission part move alternately.

[0014] Using the flapping-wing water flow power generation device provided by the present application, since the first transmission part and the second transmission part move alternately, when the input shaft rotates along the first direction, the first transmission part moves and drives the output shaft to rotate along the second direction. At this time, the output shaft drives the first elastic structure to be continuously tightened, and the elastic potential energy of the first elastic structure is continuously increased, so that the first elastic structure stores elastic potential energy.

[0015] In addition, when the input shaft rotates in the second direction, the second transmission part drives the elastic potential energy of the first elastic structure to continue to increase. When the elastic potential energy stored in the first elastic structure reaches a preset range, the first elastic structure is released. In this way, the first elastic structure will drive the permanent magnet to rotate rapidly to generate a high-power AC signal, thereby effectively improving the ability of the flapping-wing water flow power generation device to obtain and convert energy from low-flow water flow, and improving the utilization rate of water resources.

[0016] In a possible implementation of the present application, the first transmission part includes a driving gear and a first driven gear, the input shaft is inserted into the gear hole of the driving gear, and the output shaft is inserted into the gear hole of the first driven gear; the driving gear and the first driven gear are meshed. When the input shaft rotates in a first direction, the first driven gear drives the output shaft to rotate in a second direction. When the input shaft rotates in the first direction, the driving gear will drive the first driven gear and the output shaft to rotate in the second direction, so as to improve the transmission stability and structural simplicity of the flapping-wing water current power generation device while realizing the storage of elastic potential energy by the first elastic structure.

[0017] In a possible implementation of the present application, the first transmission part further includes a stop structure, which is used to limit the output shaft from rotating in the first direction. In this way, after the output shaft rotates in the second direction and drives the first elastic structure to store elastic potential energy, the output shaft can be effectively prevented from rotating in the first direction to release the elastic potential energy.

[0018] In a possible implementation of the present application, the second transmission part includes an incomplete gear, a second driven gear and a third driven gear, the second driven gear and the third driven gear are axially arranged opposite to each other and fixedly connected. The input shaft is inserted into the gear hole of the incomplete gear, the output shaft is inserted into the gear hole of the second driven gear and the gear hole of the third driven gear, and is rotationally connected to the second driven gear and the third driven gear; the second driven gear is meshed with the gear teeth of the incomplete gear and is connected to the other end of the first elastic structure.

[0019] Using the flapping-wing water flow power generation device provided by the present application, when the input shaft drives the incomplete gear to rotate in the second direction, the teeth of the incomplete gear drive the second driven gear and the third driven gear to rotate synchronously in the first direction, so as to drive the other end of the first elastic structure to rotate in the first direction, so as to improve the transmission stability and structural simplicity of the flapping-wing water flow power generation device while realizing the storage of elastic potential energy of the first elastic structure.

[0020] In a possible implementation of the present application, the second transmission part also includes a limiting part and an abutting part, the limiting part is connected to the inner side wall of the box body; and part of the limiting part is inserted into the gear groove of the third driven gear, which is used to limit the movement of the third driven gear in the second direction. Along the axial direction of the incomplete gear, the abutting part is arranged on the side of the incomplete gear close to the limiting part, and protrudes from the smooth surface of the incomplete gear. When the smooth surface of the incomplete gear is opposite to the gear teeth of the second driven gear, the abutting part abuts against the limiting part, which is used to drive part of the limiting part to separate from the gear groove of the third driven gear, and the first elastic structure releases elastic potential energy.

[0021] With the flapping-wing water current power generation device provided by the present application, in the process of the first driven gear driving the first elastic structure to store elastic potential energy, the limiter can be used to prevent the first elastic structure storing a large amount of elastic potential energy from rotating in the second direction to release the elastic potential energy. In addition, when the elastic potential energy stored in the first elastic structure reaches a preset range, the abutment portion will drive the limiter to separate from the gear groove of the third driven gear, so that the first elastic structure drives the permanent magnet to rotate rapidly to generate a high-power AC signal, and effectively improve the ability of the flapping-wing water current power generation device to obtain and convert energy from low-velocity water flow, while improving the transmission stability and structural simplicity of the flapping-wing water current power generation device.

[0022] In a possible implementation of the present application, the flapping wing body includes an outer shell, a rotating structure, a first fixed portion and a first elastic portion, and the rotating structure, the first fixed portion and the first elastic portion are all located in the outer shell, and the first fixed portion and the first elastic portion are connected. The first fixed portion is inserted into the inner side wall of the outer shell; the first elastic portion is located between the rotating structure and the first fixed portion. The rotating structure is used to abut against the first elastic portion and drive the free end of the first elastic portion to move toward or away from the first fixed portion. When the free end of the first elastic portion moves toward or away from the first fixed portion, an alternating current signal is generated between the first elastic portion and the first fixed portion.

[0023] The flapping-wing water flow power generation device provided by the present application is adopted, by arranging a first elastic part and a first fixed part for contact power generation in the shell of the flapping-wing mechanism, so as to effectively capture the kinetic energy generated during the swing of the flapping-wing mechanism relative to the connecting rod, thereby realizing the coordinated collection of kinetic energy of multiple degrees of freedom of the flapping-wing water flow power generation device, which is conducive to further improving the output electrical energy capacity of the flapping-wing water flow power generation device.

[0024] In a possible implementation of the present application, the flapping-wing body also includes a second fixed portion and a second elastic portion, the second fixed portion is connected to the second elastic portion, and the second fixed portion is inserted into the inner wall of the outer shell, and the adapter structure is located between the first elastic portion and the second elastic portion. The rotating structure is used to abut against the second elastic portion, and drive the free end of the second elastic portion to move toward or away from the second fixed portion. When the free end of the second elastic portion moves toward or away from the second fixed portion, an alternating current signal can be generated between the second elastic portion and the second fixed portion. This is used to further effectively capture the kinetic energy generated during the swing of the flapping-wing mechanism relative to the connecting rod, thereby realizing the coordinated collection of kinetic energy of multiple degrees of freedom of the flapping-wing water flow power generation device, which is conducive to further improving the ability of the flapping-wing water flow power generation device to output electrical energy.

[0025] In a possible implementation of the present application, the flapping wing body further includes a connecting structure, which is disposed between the first elastic part and the second elastic part and is connected to the first elastic part and the second elastic part respectively. Thus, when one of the elastic parts moves toward the relative fixed part, the elastic part can drive the other elastic part away from the corresponding fixed part, thereby effectively reducing the risk of the elastic part and the fixed part being unable to separate normally due to electrostatic adsorption.

[0026] In a possible implementation of the present application, the flapping-wing body also includes a rotating shaft and a second elastic structure, and the rotating shaft and the second elastic structure are located in the shell. The rotating shaft is inserted into the rotating structure and is rotationally connected to the rotating structure; the rotating shaft is fixedly connected to the shell. The second elastic structure is sleeved on the rotating shaft, and one end of the second elastic structure is connected to the rotating structure, and the other end is connected to the shell. The shell is installed on the connecting rod, and the shell is rotationally connected to the connecting rod along the axial direction of the rotating shaft. In this way, during the swinging of the rotating structure, the rotating structure can be automatically reset and continue to swing in the direction of the torsional force under the action of the torsional force of the second elastic structure, which is beneficial to improving the swinging stability of the rotating structure and effectively improving the contact stability between the elastic part and the fixed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a flapping-wing water flow power generation device provided in this application;

[0028] Figure 2 A structural schematic diagram of a wing section;

[0029] Figure 3 for Figure 1 A cross-sectional view of a flapping-wing water current power generation device is provided;

[0030] Figure 4 A schematic diagram of the structure of the flapping-wing water flow power generation device provided by the present application in a first state;

[0031] Figure 5 A schematic diagram of the structure of the flapping-wing water flow power generation device provided by the present application in the second state;

[0032] Figure 6 for Figure 3 A partial schematic diagram of a flapping-wing water current power generation device is provided;

[0033] Figure 7 for Figure 1 A partial schematic diagram of a flapping-wing water current power generation device is provided;

[0034] Figure 8 A structural schematic diagram of a first elastic structure provided in the present application;

[0035] Fig. 9 A partial schematic diagram of the first transmission unit provided in this application.

[0036] Figure numerals: 1-box; 2-wing mechanism; 21-connecting rod; 211-stopper; 22-wing body; 221-connecting shaft; 2211-limiting structure; 222-wave surface; 223-housing; 224-rotation structure; 2241-rotation shaft; 225-first fixing part; 2251-first friction film; 226-first elastic part; 2261-second friction film; 227-second fixing part; 228-second elastic part; 229-connecting Structure; 2201-second elastic structure; 3-input shaft; 4-transmission mechanism; 5-first elastic structure; 6-permanent magnet; 7-coil; 8-output shaft; 01-leading edge; 02-trailing edge; 41-first transmission part; 411-driving gear; 412-first driven gear; 42-second transmission part; 421-incomplete gear; 422-second driven gear; 423-third driven gear; 424-limiting part; 425-abutting part; 426-winding spring disk. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all illustrated by taking the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings of the embodiments of the present application are only used to illustrate the relative position relationship, and they do not represent the true proportion.

[0038] It should be noted that specific details are described in the following description to facilitate understanding of the present application. However, the present application can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the risk of the connotation of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.

[0039] Water resources are an abundant and stable renewable energy source. They are an irreplaceable basic natural resource for maintaining the balance of the earth's ecosystem and supporting social and economic development.

[0040] Hydropower generation is an effective way to utilize water resources. Currently, hydropower generation mostly uses the kinetic energy generated by the high-speed movement of rivers and lakes from high places to low places, which is converted into mechanical energy through turbines to drive power supply equipment to generate electricity. However, when the water flow is at a low flow rate, it is difficult for power supply equipment to achieve the conversion from kinetic energy to electrical energy, which will lead to a waste of renewable resources.

[0041] In view of this, the power supply equipment provided by the present application sets an elastic structure and makes the low-velocity water flow do work on the elastic structure, so that the elastic potential energy of the elastic structure will continue to increase. When the value of the elastic potential energy reaches a preset range, the elastic structure can be released so that the elastic structure drives the permanent magnet 6 to move quickly, thereby generating a high-power AC signal and realizing energy acquisition and conversion of low-velocity water flow, thereby improving the utilization rate of water resources. In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] It is understandable that the flapping-wing water flow power generation device provided in the present application can also be used to generate electricity in other scenarios.

[0043] refer to Figure 1 , Figure 1 A structural schematic diagram of a flapping-wing water current power generation device provided in the present application. The flapping-wing water current power generation device is used for water current power generation, and includes a housing 1, a flapping-wing mechanism 2, an input shaft 3, a transmission mechanism 4, a first elastic structure 5, a permanent magnet 6, and a coil 7, wherein the transmission mechanism 4, the first elastic structure 5, the permanent magnet 6, and the coil 7 are all located inside the housing 1, and a portion of the input shaft 3 extends into the housing 1, and is connected to the first elastic structure 5 through the transmission mechanism 4, so as to realize that the first elastic structure 5 stores or releases elastic potential energy.

[0044] In addition, along the axial direction of the output shaft 8 of the transmission mechanism 4, the permanent magnet 6 is located between the first elastic structure 5 and the coil 7, and the coil 7 is installed on the inner wall of the box body 1. At the same time, the first elastic structure 5 is connected to the permanent magnet 6, so that the first elastic structure 5 can drive the permanent magnet 6 to rotate around the axis of the output shaft 8 of the transmission mechanism 4 by storing or releasing elastic potential energy, thereby generating an AC signal.

[0045] It is understandable that the input shaft 3 and the output shaft 8 can be arranged as follows: Figure 1 The status interval settings shown may also be arranged in other ways according to actual needs.

[0046] In addition, the flapping-wing water flow power generation device provided by the present application can be used by arranging the flapping-wing mechanism 2 on the outside of the housing 1, and connecting the flapping-wing mechanism 2 to the input shaft 3. In addition, during the operation of the flapping-wing water flow power generation device, at least part of the flapping-wing mechanism 2 is located below the water surface along the axial direction of the input shaft 3. In this way, when the flapping-wing mechanism 2 is impacted by the water flow, the side of the flapping-wing mechanism 2 away from the input shaft 3 swings around the axis of the input shaft 3, thereby driving the input shaft 3 to rotate synchronously.

[0047] In the process of the flapping wing mechanism 2 driving the input shaft 3 to rotate, the first elastic structure 5 is acted upon by an external force, and the elastic potential energy inside it will continue to increase, thereby realizing the storage of the elastic potential energy. When the value of the elastic potential energy stored in the first elastic structure 5 reaches a preset range, the first elastic mechanism will release the stored elastic potential energy and drive the permanent magnet 6 to rotate around the axis of the output shaft 8 of the transmission mechanism 4, so as to quickly cut the magnetic flux lines and generate a high-power AC signal, thereby effectively improving the ability to obtain and convert energy from low-velocity water flows and improving the utilization rate of water resources.

[0048] It should be noted that the present application does not limit the specific form of the first elastic structure 5 . Exemplarily, the first elastic structure 5 may be a coil spring or a torsion spring.

[0049] It is understandable that the flapping-wing water flow power generation device is also provided with an external circuit and an electric energy storage module for converting the above-mentioned alternating current into direct current and storing it, so as to power the electrical equipment (such as sensors). In addition, when the flapping-wing water flow power generation device provided by the present application is applied to hydropower generation, since the flapping-wing water flow power generation device can autonomously realize the collection and conversion of weak dynamic motion energy and continuously supply power to the electrical equipment, it is conducive to improving the adaptability of the flapping-wing water flow power generation device to different environments and electrical equipment.

[0050] When specifically setting the flapping wing mechanism 2, continue to refer to Figure 1 The flapping wing mechanism 2 includes a connecting rod 21 and a flapping wing body 22, and the flapping wing body 22 is connected to the input shaft 3 through the connecting rod 21. It should be noted that the flapping wing body 22 has a wing section, that is, an infinite wingspan wing with a constant cross-sectional shape. Figure 2 As shown, Figure 2 Used to show the shape of the wing section, the wing section includes a leading edge 01 and a trailing edge 02, wherein the edge on the wing section farthest from the trailing edge 02 is called the leading edge 01; the straight line connecting the leading edge 01 and the trailing edge 02 is called the chord, and its length is called the chord length.

[0051] The shape of the flapping-wing body 22 of the flapping-wing water flow power generation device provided in the present application can be a NACA airfoil or an elliptical airfoil.

[0052] Combined Figure 1 and Figure 3 , Figure 3 It is used to show the internal structure of the flapping wing body 22 after the wing section is cut. The end of the flapping wing body 22 includes a connecting shaft 221, and the connecting shaft 221 is located between the leading edge 01 and the trailing edge 02, and is perpendicular to the wing section of the flapping wing body 22.

[0053] In addition, the extended surface of the wing section of the flapping wing body 22 intersects with the axial direction of the input shaft 3, and the axial direction of the input shaft 3 can be exemplarily parallel to the axial direction of the connecting shaft 221. Along the wing section direction penetrating the flapping wing body 22, the end of the flapping wing body 22 is rotatably connected to the connecting rod 21, that is, the connecting shaft 221 is rotatably connected to the connecting rod 21. And the leading edge 01 is located between the trailing edge 02 and the input shaft 3. In this way, when the flapping wing body 22 is impacted by the water flow, a pressure difference will be generated between different positions of the outer wall of the flapping wing body 22, so that the flapping wing body 22 swings around the axis of the end of the flapping wing body 22.

[0054] In an optional embodiment, when the axis of the flapping wing body 22 around the end of the flapping wing body 22 (i.e., the axis of the flapping wing body 22 around the connecting shaft 221) is as follows: Figure 4 The first state shown swings to Figure 5 In the second state shown, the input shaft 3 rotates in the first direction, while the first elastic structure 5 stores elastic potential energy, and the permanent magnet 6 is stationary relative to the axis of the output shaft 8 of the transmission mechanism 4 .

[0055] In addition, when the axis of the flapping wing body 22 around the end of the flapping wing body 22 (the axis of the flapping wing body 22 around the connecting shaft 221) is as follows Figure 5 The second state shown swings to Figure 4 In the first state shown, the input shaft 3 rotates in the second direction, and the first elastic structure 5 drives the permanent magnet 6 to rotate around the axis of the output shaft 8 of the transmission mechanism 4 by storing or releasing elastic potential energy.

[0056] It should be noted that, in this application, the operating state of the flapping-wing water flow power generation device will be described in detail with the first direction being counterclockwise and the second direction being clockwise.

[0057] In addition, the rotation angle α of the flapping wing body 22 relative to the connecting rod 21 can be adjusted according to actual needs. For example, α can satisfy: -60°≤α≤60°, so that after the flapping wing body 22 is subjected to the impact force of the water flow and swings to the first state, the flapping wing body 22 can continue to swing to the second state under the action of the impact force of the water flow, so as to reduce the risk that the flapping wing body 22 cannot achieve autonomous swinging under the impact force of the water flow.

[0058] When α satisfies: -60°≤α≤60°, the flapping-wing body 22 can swing around the axis of the input shaft 3, and the swing angle β satisfies: -120°<β<120°.

[0059] Using the flapping-wing water flow power generation device provided by the present application, during the operation of the flapping-wing water flow power generation device, when the water flow hits the side wall of the flapping-wing body 22, due to the pressure difference between different positions of the outer wall of the flapping-wing body 22, the flapping-wing body 22 will swing around the axis of the connecting shaft 221 to drive the input shaft 3 to rotate. And by specifying the corresponding relationship between the rotation direction of the input shaft 3 and the storage or release of the elastic potential energy of the first elastic structure 5, the storage of the elastic potential energy of the first elastic structure 5 is maximized. When the first elastic structure 5 releases the elastic potential energy, the first elastic structure 5 drives the permanent magnet 6 to rotate rapidly around the axis of the output shaft 8 of the transmission mechanism 4 to generate a high-power AC signal, thereby effectively improving the ability to obtain and convert energy from low-flow water flow and improving the utilization rate of water resources.

[0060] It is worth mentioning that the flapping-wing body 22 includes a wave surface 222, and the wave surface 222 is located between the axis of the end of the flapping-wing body 22 and the input shaft 3, that is, the wave surface 222 is located at the leading edge 01 of the flapping-wing body 22. And during the operation of the flapping-wing water flow power generation device, when the line connecting the leading edge 01 and the trailing edge 02 is parallel to the direction of the water flow, the direction from the leading edge 01 to the trailing edge 02 is the flow direction of the water flow. The wave surface 222 can improve the vortex evolution process around the flapping-wing body 22, so as to further improve the dynamic performance of the flapping-wing body 22 and the adaptability to water flows of different flow rates, thereby effectively improving the rotation efficiency of the flapping-wing body 22.

[0061] When specifically setting the connecting rod 21, continue to refer to Figure 4 The connecting rod 21 includes two stoppers 211, and the two stoppers 211 are arranged opposite to each other, and at least a part of the flapping-wing body 22 is located between the two stoppers 211. In this way, when the flapping-wing body 22 rotates relative to the connecting rod 21, the flapping-wing body 22 can be used to abut against the stoppers 211 to limit the swing angle of the flapping-wing body 22 relative to the connecting rod 21, and at the same time, the structure of the flapping-wing type water current power generation device is simplified while meeting the requirement that the flapping-wing body 22 drives the input shaft 3 to continuously change its rotation direction.

[0062] It should be noted that the present application does not limit the specific structure of the stopper 211. For example, the stopper 211 may be a protrusion or bend disposed at the end of the connecting rod 21 away from the input shaft 3, and the protrusion or bend is along the axial direction of the connecting shaft 221. In addition, along the axial direction of the connecting shaft 221, the connecting shaft 221 protrudes from the surface of the connecting rod 21, and ... Figure 5In the extending direction of the connecting rod 21 shown in the figure, the connecting shaft 221 is provided with a limiting structure 2211, and the limiting structure 2211 is located between the two stoppers 211. In this way, when the connecting shaft 221 rotates, the limiting structure 2211 can abut against the stopper 211, so as to simplify the structure of the flapping wing body 22 while satisfying the requirement of limiting the swing angle of the flapping wing body 22 relative to the connecting rod 21.

[0063] In a specific embodiment, Figure 3 As shown, the flapping wing body 22 also includes a shell 223, a rotating structure 224, a first fixing part 225 and a first elastic part 226. The rotating structure 224, the first fixing part 225 and the first elastic part 226 are all located in the shell 223, and the first fixing part 225 and the first elastic part 226 are connected. At the same time, the first fixing part 225 is inserted into the inner side wall of the shell 223, and the first elastic part 226 is located between the rotating structure 224 and the first fixing part 225. Figure 1 As shown, the housing 223 is mounted on the connecting rod 21 via the connecting shaft 221 , and the housing 223 rotates relative to the connecting rod 21 around the axis of the connecting shaft 221 .

[0064] It should be noted that the connection between the housing 223 and the connecting shaft 221 is exemplarily a fixed connection, and the housing 223 and the connecting shaft 221 rotate synchronously around the axis of the connecting shaft 221 relative to the connecting rod 21 .

[0065] When the first fixing portion 225 and the first elastic portion 226 are specifically arranged, as shown in FIG. Figure 6 As shown, Figure 6 Used to show the structure of the first fixed part 225 and the first elastic part 226, wherein the first fixed part 225 includes a substrate, a metal electrode and a first friction film 2251, and the metal electrode is located between the substrate and the friction film, and the metal electrode is located on the surface of the substrate, and the friction film is located on the surface of the metal electrode.

[0066] The first elastic part 226 includes a substrate, a flexible layer, a metal electrode and a second friction film 2261 arranged in sequence, and the first friction film 2251 and the second friction film 2261 are polymer materials with different positions in the triboelectric sequence, the first friction film 2251 is exemplarily a nylon film, and the second friction film 2261 is exemplarily a fluorinated ethylene propylene film, and the two are attached to the surface of the metal electrode as positive and negative friction materials, respectively. The metal electrode can be exemplarily copper or aluminum, etc.

[0067] When the rotating structure 224 is specifically set, Figure 3As shown, the rotating structure 224 is exemplarily an elliptical cylinder, which is axially connected to the bottom of the shell 223 through a rotating shaft 2241, and the axial direction of the rotating shaft 2241 is parallel to the axial direction of the connecting shaft 221 arranged at the end of the flapping wing body 22. At the same time, the elliptical cylinder is rotationally connected to the rotating shaft 2241.

[0068] In this way, when the housing 223 of the flapping wing body 22 is swung relative to the connecting rod 21 by an external force, the rotating structure 224 will also rotate around the axis of the rotating shaft 2241. When the rotating structure 224 moves toward the first elastic part 226, the rotating structure 224 will squeeze the first elastic part 226, so that the free end of the first elastic part 226 moves toward the first fixed part 225, and the first elastic part 226 contacts the first fixed part 225. When the rotating structure 224 moves away from the first elastic part 226, the squeezed free end of the first elastic part 226 separates from the first fixed part 225.

[0069] Since the contact surface of the first elastic part 226 and the first fixed part 225 carries different charges, charge movement will occur between the first elastic part 226 and the first fixed part 225 during the contact and separation process, thereby generating an AC signal. Therefore, the flapping-wing water current power generation device provided by the present application is provided with a contact power generation structure in the housing 223 of the flapping-wing mechanism 2 to effectively capture the kinetic energy generated during the swing of the flapping-wing mechanism 2 relative to the connecting rod 21, thereby realizing the coordinated collection of kinetic energy of multiple degrees of freedom of the flapping-wing water current power generation device, which is conducive to further improving the ability of the flapping-wing water current power generation device to output electrical energy.

[0070] In addition, if Figure 3 As shown, the flapping wing body 22 can also include a second fixed portion 227 and a second elastic portion 228, the second fixed portion 227 is connected to the second elastic portion 228, and the second fixed portion 227 is inserted into the inner wall of the outer shell 223, and the transition structure is located between the first elastic portion 226 and the second elastic portion 228.

[0071] It should be noted that the structural form of the second fixing portion 227 and the second elastic portion 228, and the connection relationship between the two can refer to the first fixing portion 225 and the first elastic portion 226 described above, and will not be repeated here.

[0072] In this way, when the outer shell 223 of the flapping wing body 22 is swung relative to the connecting rod 21 by external force, no matter the rotating structure 224 moves toward the first elastic part 226 or toward the second elastic part 228, the rotating structure 224 can squeeze the corresponding elastic part so that the free end of the elastic part moves toward the corresponding fixed part, and the free end of the elastic part contacts the fixed part.

[0073] Since the contact surface of the second elastic part 228 and the second fixed part 227 also carries opposite charges, during the contact and separation process of the second elastic part 228 and the second fixed part 227, charge movement will also occur between the two, thereby generating an AC signal. Therefore, the power supply device provided by the present application is used to further capture the kinetic energy generated by the flapping mechanism 2 in the housing 223 relative to the connecting rod 21, thereby further improving the ability of the flapping-wing water current power generation device to output electrical energy.

[0074] It is worth mentioning that the flapping wing body 22 also includes a connecting structure 229, which is arranged between the first elastic part 226 and the second elastic part 228, and is connected to the first elastic part 226 and the second elastic part 228 respectively. In this way, when the first elastic part 226 moves toward the first fixed part 225, the first elastic part 226 can drive the second elastic part 228 to move in the direction of the first fixed part 225, which can effectively reduce the risk that the second elastic part 228 and the second fixed part 227 cannot be separated normally due to electrostatic adsorption. It can be understood that when the second elastic part 228 moves toward the second fixed part 227, the second elastic part 228 will also drive the first elastic part 226 to move toward the second fixed part 227, so it can also reduce the risk that the first elastic part 226 and the first fixed part 225 cannot be separated normally due to electrostatic adsorption.

[0075] In addition, the first elastic part 226, the first fixed part 225, the second elastic part 228, the second fixed part 227 and the connecting structure 229 can be arranged in two symmetrical groups, and the rotating shaft 2241 connected to the elliptical cylinder for rotation is located between the two groups of structures along the direction of the long axis of the elliptical cylinder. In this way, when the elliptical cylinder swings, both ends of the elliptical cylinder along the long axis can be used to apply pressure to the relative elastic part to make the elastic part contact with the fixed part, which is conducive to further improving the ability of the flapping-wing water current power generation device to output electrical energy.

[0076] In an optional embodiment, the flapping wing body 22 further includes a second elastic structure 2201, which is sleeved on the rotating shaft 2241, and one end of the second elastic structure 2201 is connected to the rotating structure 224, and the other end is connected to the housing 223. The second elastic structure 2201 is exemplarily a torsion spring, so that during the swinging process of the rotating structure 224, the rotating structure 224 can be automatically reset and continue to swing in the direction of the torsion force under the action of the torsion force of the torsion spring, which is conducive to improving the swing stability of the rotating structure 224 and effectively improving the contact stability between the elastic part and the fixed part.

[0077] In a specific embodiment, reference Figure 7 , Figure 7 for Figure 1 The partial schematic diagram of the flapping-wing water current power generation device is provided to illustrate the transmission mechanism 4. Specifically, the transmission mechanism 4 may include a first transmission part 41 and a second transmission part 42, and the input shaft 3 is connected to the output shaft 8 through the first transmission part 41.

[0078] In addition, the first elastic structure 5 in the flapping-wing water flow power generation device provided in the present application will be described in detail using a coil spring as an example.

[0079] like Figure 8 As shown, one end of the output shaft 8 is connected to one end of the first elastic structure 5 (the end of the inner ring of the coil spring), and the output shaft 8 is rotationally connected to the second transmission part 42. At the same time, the input shaft 3 is connected to the other end of the first elastic structure 5 (the end of the outer ring of the coil spring) through the second transmission part 42.

[0080] Using the flapping-wing water flow power generation device provided by the present application, since the first transmission part 41 and the second transmission part 42 move alternately, when the input shaft 3 rotates in the first direction (counterclockwise), the first transmission part 41 moves and drives the output shaft 8 to rotate in the second direction (clockwise). At this time, the output shaft 8 drives the end of the inner ring of the coil spring to rotate, while the second rotating part and the end of the outer ring of the coil spring are stationary, the coil spring is continuously tightened, and the elastic potential energy of the coil spring is continuously increased, so that the coil spring stores elastic potential energy.

[0081] In addition, when the input shaft 3 rotates in the second direction, the second transmission part 42 drives the end of the outer ring of the coil spring to rotate counterclockwise, while the output shaft 8 is stationary, that is, the end of the inner ring of the coil spring is stationary, and the elastic potential energy of the coil spring continues to increase. When the elastic potential energy stored in the coil spring reaches a preset range, the coil spring is released. Since the end of the outer ring of the coil spring is fixedly connected to the permanent magnet 6, the end of the outer ring of the coil spring will drive the permanent magnet 6 to rotate rapidly in the clockwise direction to generate a high-power AC signal, thereby effectively improving the ability of the flapping-wing water flow power generation device to obtain and convert energy from low-velocity water flow, and improving the utilization rate of water resources.

[0082] In an optional embodiment, if Figure 8 As shown, the first transmission part 41 includes a driving gear 411 and a first driven gear 412 , the input shaft 3 is inserted into the gear hole of the driving gear 411 , the output shaft 8 is inserted into the gear hole of the first driven gear 412 , and the driving gear 411 and the first driven gear 412 are meshed.

[0083] In this way, when the input shaft 3 rotates in the first direction, the driving gear 411 will drive the first driven gear 412 and the output shaft 8 to rotate in the second direction, so as to improve the transmission stability and structural simplicity of the flapping-wing water flow power generation device while realizing the storage of elastic potential energy of the coil spring.

[0084] It is worth mentioning that the first transmission part 41 also includes a stop structure, which is used to limit the output shaft 8 from rotating in the first direction. The stop structure can be exemplarily a one-way bearing, and the first transmission part 41 can include multiple one-way bearings. Specifically, along the second direction, the output shaft 8 and the first driven gear 412 are fixedly connected by a one-way bearing. At the same time, along the first direction, the output shaft 8 is fixedly connected to the inner wall of the housing 1 by a one-way bearing. In this way, when the output shaft 8 rotates in the second direction and drives the first elastic structure 5 to store elastic potential energy, the one-way bearing between the output shaft 8 and the inner wall of the housing 1 can limit the output shaft 8 from rotating in the first direction, thereby preventing the first elastic structure 5 from releasing elastic potential energy.

[0085] In an optional embodiment, continue to refer to Figure 7 The second transmission part 42 includes an incomplete gear 421, a second driven gear 422 and a third driven gear 423. The second driven gear 422 and the third driven gear 423 are arranged opposite to each other in the axial direction and are fixedly connected. At the same time, the input shaft 3 is inserted into the gear hole of the incomplete gear 421, the output shaft 8 is inserted into the gear holes of the second driven gear 422 and the third driven gear 423, and the output shaft 8 is rotationally connected to the second driven gear 422 and the third driven gear 423, and the second driven gear 422 is meshed with the gear teeth of the incomplete gear 421, and the second driven gear 422 is connected to the other end of the first elastic structure 5 (the end of the outer ring of the coil spring).

[0086] In this way, when the input shaft 3 drives the incomplete gear 421 to rotate in the second direction (clockwise), the gear teeth of the incomplete gear 421 drive the second driven gear 422 and the third driven gear 423 to rotate synchronously in the first direction, so as to drive the end of the outer ring of the coil spring to rotate in the first direction, so as to realize the storage of elastic potential energy of the first elastic structure 5 while improving the transmission stability and structural simplicity of the flapping-wing water flow power generation device.

[0087] In addition, the second transmission part 42 may also include a limiting part 424, which is connected to the inner side wall of the box body 1, and part of the limiting part 424 can move relative to the third driven gear 423. At the same time, part of the limiting part 424 is used to be inserted into the gear groove of the third driven gear 423, so as to limit the movement of the third driven gear 423 along the second direction when the input shaft 3 drives the third driven gear 423 to rotate. In this way, when the first driven gear 412 drives the coil spring to store elastic potential energy, the coil spring storing a large amount of elastic potential energy can be effectively prevented from rotating along the second direction to release the elastic potential energy, thereby effectively improving the ability of the flapping-wing water current power generation device to obtain and convert kinetic energy, so as to generate a high-power AC signal when the coil spring releases the elastic potential energy together.

[0088] It is worth mentioning that the reference Figure 7 and Fig. 9 , Fig. 9 To illustrate a structure of the abutment portion 425 , the second transmission portion 42 further includes an abutment portion 425 , which is disposed on a side of the incomplete gear 421 close to the limiting portion 424 along the axial direction of the incomplete gear 421 and protrudes from the smooth surface of the incomplete gear 421 .

[0089] In this way, during the operation of the flapping-wing water current power generation device, when the smooth surface of the incomplete gear 421 is opposite to the gear teeth of the second driven gear 422, the abutment portion 425 abuts against the limiting portion 424, and drives part of the limiting portion 424 to separate from the gear groove of the third driven gear 423. In addition, since the second driven gear 422 and the third driven gear 423 are both rotationally connected to the output shaft 8, when the limiting portion 424 is separated from the gear groove of the third driven gear 423, the first elastic structure 5 will release elastic potential energy, thereby driving the second driven gear 422, the third driven gear 423 and the permanent magnet 6 to rotate synchronously and rapidly to generate a high-power AC signal, and effectively improve the ability of the flapping-wing water current power generation device to obtain and convert energy of low-flow water flow, while improving the transmission stability and structural simplicity of the flapping-wing water current power generation device.

[0090] It should be noted that the present application does not limit the specific form of the abutment portion 425, and the abutment portion 425 may be, for example, a separately provided cam, or a protrusion provided on one side of the incomplete gear 421 along the axial direction of the incomplete gear 421 and protruding from the smooth surface of the incomplete gear 421. This makes the structure of the flapping-wing water current power generation device more concise while meeting the functional requirements of the abutment portion 425.

[0091] In addition, a one-way bearing is also arranged between the input shaft 3 and the incomplete gear 421, and the arrangement direction of the one-way bearing is opposite to the arrangement direction of the one-way bearing between the input shaft 3 and the driving gear 411. When the input shaft 3 swings in different directions, the corresponding transmission part is driven to move, thereby realizing the storage or release of elastic potential energy of the first elastic structure 5.

[0092] It should be noted that when the limiting portion 424 is specifically set, the limiting portion 424 can be exemplarily a pawl or connecting rod 21 structure, and the end of the pawl or connecting rod 21 is used to be inserted into the gear groove to limit the rotation direction of the third driven gear 423.

[0093] In addition, the second transmission part 42 may further include a coil spring disk 426 for accommodating a coil spring. And the end of the outer ring of the coil spring is fixedly connected to the side wall of the coil spring disk 426. When the coil spring disk 426 is specifically arranged, along the axial direction of the output shaft 8, the coil spring disk 426 is located on the side of the second driven gear 422 away from the third driven gear 423, and is fixedly connected to the second driven gear 422 and the permanent magnet 6. At the same time, the output shaft 8 passes through the bottom of the coil spring disk 426 and is fixed to the end of the inner ring of the coil spring. In this way, when the coil spring stores or releases elastic potential energy, it is beneficial to improve the stability of the coil spring.

[0094] In summary, using the flapping-wing water flow power generation device provided by the present application, in the process of the flapping-wing mechanism 2 driving the input shaft 3 to rotate, the first elastic structure 5 is subjected to external force, and the elastic potential energy inside it will continue to increase, thereby realizing the storage of elastic potential energy. When the value of the elastic potential energy stored in the first elastic structure 5 reaches a preset range, the first elastic mechanism will release the stored elastic potential energy together, and drive the permanent magnet 6 to rotate around the axis of the output shaft 8 of the transmission mechanism 4, so as to quickly cut the magnetic flux lines and generate a high-power AC signal, thereby effectively improving the ability to obtain and convert energy from low-flow water flow, and improving the utilization rate of water resources.

[0095] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A flapping-wing water current power generation device for water current power generation, characterized in that: It includes a box, a flapping mechanism, an input shaft, a transmission mechanism, a first elastic structure, a permanent magnet and a coil, wherein the transmission mechanism, the first elastic structure, the permanent magnet and the coil are located inside the box; wherein: Part of the input shaft extends into the box and is connected to the first elastic structure through the transmission mechanism; the first elastic structure is connected to the permanent magnet; and along the axial direction of the output shaft of the transmission mechanism, the permanent magnet is located between the first elastic structure and the coil; the coil is installed on the inner side wall of the box; The flapping wing mechanism is located outside the box and connected to the input shaft; the side of the flapping wing mechanism away from the input shaft swings around the axis of the input shaft to drive the input shaft to rotate synchronously; The first elastic structure drives the permanent magnet to rotate around the axis of the output shaft of the transmission mechanism by storing or releasing elastic potential energy.

2. The flapping-wing water flow power generation device according to claim 1, characterized in that: The flapping wing mechanism comprises a connecting rod and a flapping wing body, wherein the flapping wing body is connected to the input shaft through the connecting rod; an extended surface of the wing section of the flapping wing body intersects with the axial direction of the input shaft; Along the wing section direction penetrating the flapping wing body, the end of the flapping wing body is rotatably connected to the connecting rod; When the flapping wing body swings from a first state to a second state around the axis of the end of the flapping wing body, the input shaft rotates in a first direction, the first elastic structure stores elastic potential energy, and the permanent magnet is stationary relative to the axis of the output shaft of the transmission mechanism; When the flapping wing body swings from the second state to the first state around the axis of the end of the flapping wing body, the input shaft rotates in the second direction, and the first elastic structure drives the permanent magnet to rotate around the axis of the output shaft of the transmission mechanism by storing or releasing elastic potential energy; The first direction is opposite to the second direction.

3. The flapping-wing water flow power generation device according to claim 2, characterized in that: The flapping wing body includes a wave surface, and the wave surface is located between an axis of an end portion of the flapping wing body and the input shaft.

4. The flapping-wing water flow power generation device according to claim 2, characterized in that: The rotation angle of the flapping wing body relative to the connecting rod is α, and α satisfies: -60°≤α≤60°.

5. The flapping-wing water flow power generation device according to claim 4, characterized in that: The connecting rod comprises two stoppers, the two stoppers are arranged opposite to each other, and at least a part of the flapping wing body is located between the two stoppers; When the flapping-wing body rotates relative to the connecting rod, the flapping-wing body is used to abut against the stopper.

6. The flapping-wing water current power generation device according to any one of claims 2 to 5, characterized in that: The transmission mechanism comprises a first transmission part and a second transmission part, the input shaft is connected to the output shaft through the first transmission part; one end of the output shaft is connected to one end of the first elastic structure; the output shaft is rotatably connected to the second transmission part; The input shaft is connected to the other end of the first elastic structure through the second transmission part; When the input shaft rotates in the first direction, the first transmission part moves to drive the output shaft to rotate in the second direction, and the first elastic structure stores elastic potential energy; When the input shaft rotates along the second direction, the second transmission part moves, the output shaft is stationary, and the first elastic structure stores or releases elastic potential energy; And the first transmission part and the second transmission part move alternately.

7. The flapping-wing water current power generation device according to claim 6, characterized in that: The first transmission part includes a driving gear and a first driven gear, the input shaft is inserted into the gear hole of the driving gear, and the output shaft is inserted into the gear hole of the first driven gear; The driving gear is meshed with the first driven gear; When the input shaft rotates along the first direction, the first driven gear drives the output shaft to rotate along the second direction.

8. The flapping-wing water current power generation device according to claim 7, characterized in that: The first transmission part further includes a stopping structure, and the stopping structure is used to limit the output shaft from rotating along the first direction.

9. The flapping-wing water current power generation device according to claim 6, characterized in that: The second transmission part comprises an incomplete gear, a second driven gear and a third driven gear, wherein the second driven gear and the third driven gear are axially arranged opposite to each other and fixedly connected; The input shaft is inserted into the gear hole of the incomplete gear, and the output shaft is inserted into the gear hole of the second driven gear and the gear hole of the third driven gear, and is rotationally connected to the second driven gear and the third driven gear; the second driven gear is meshed with the gear teeth of the incomplete gear and is connected to the other end of the first elastic structure.

10. The flapping-wing water current power generation device according to claim 9, characterized in that: The second transmission part further includes a limiting part and an abutting part, the limiting part is connected to the inner side wall of the box body; and a part of the limiting part is inserted into the gear groove of the third driven gear to limit the movement of the third driven gear along the second direction; Along the axial direction of the incomplete gear, the abutment portion is arranged on a side of the incomplete gear close to the limiting portion and protrudes from the smooth surface of the incomplete gear; When the smooth surface of the incomplete gear is opposite to the gear teeth of the second driven gear, the abutment portion abuts against the limiting portion to drive part of the limiting portion to separate from the gear groove of the third driven gear, and the first elastic structure releases elastic potential energy.

11. The flapping-wing water current power generation device according to any one of claims 2 to 5, characterized in that: The flapping wing body comprises a shell, a rotating structure, a first fixing part and a first elastic part, wherein the rotating structure, the first fixing part and the first elastic part are all located in the shell, and the first fixing part and the first elastic part are connected; The first fixing portion is inserted into the inner wall of the housing; the first elastic portion is located between the rotating structure and the first fixing portion; The rotating structure is used to abut against the first elastic portion and drive the free end of the first elastic portion to move toward or away from the first fixed portion; When the free end of the first elastic portion moves toward or away from the first fixing portion, an alternating current signal is generated between the first elastic portion and the first fixing portion.

12. The flapping-wing water current power generation device according to claim 11, characterized in that: The flapping wing body further includes a second fixing portion and a second elastic portion, wherein the second fixing portion is connected to the second elastic portion, and the second fixing portion is inserted into the inner side wall of the shell, and the transition structure is located between the first elastic portion and the second elastic portion; The rotating structure is used to abut against the second elastic portion and drive the free end of the second elastic portion to move toward or away from the second fixed portion; When the free end of the second elastic portion moves toward or away from the second fixing portion, an alternating current signal can be generated between the second elastic portion and the second fixing portion.

13. The flapping-wing water current power generation device according to claim 12, characterized in that: The flapping-wing body further includes a connecting structure, which is disposed between the first elastic portion and the second elastic portion and is respectively connected to the first elastic portion and the second elastic portion.

14. The flapping-wing water current power generation device according to claim 13, characterized in that: The flapping wing body further comprises a rotating shaft and a second elastic structure, wherein the rotating shaft and the second elastic structure are located in the shell; The rotating shaft is inserted into the rotating structure and is rotatably connected to the rotating structure; the rotating shaft is fixedly connected to the housing; The second elastic structure is sleeved on the rotating shaft, and one end of the second elastic structure is connected to the rotating structure, and the other end is connected to the housing; The housing is mounted on the connecting rod, and along the axial direction of the rotating shaft, the housing is rotatably connected to the connecting rod.

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