A flapping wing power generation device with replaceable ball socket buckle and working method thereof

Abstract

The application discloses a flapping wing power generation device with replaceable ball socket buckle and a working method thereof, and is used for ocean energy, river energy utilization and oscillation flapping wing energy collection application. The device comprises a replaceable ball socket buckle structure, flapping wing blades, a gear and rack transmission mechanism, a power output device and the like. When the device works, shedding vortex excitation flapping wing blades are formed by fluid flowing through the surface of the flapping wing blades to start the oscillation process of the flapping wing blades; the flapping wing blades are used for collecting abundant renewable fluid energy, and fossil fuels are not consumed, so that green power generation is realized; the self-adaptive ball socket structure is formed by fluid impact on the elastic film to realize efficient flow control and improve the flapping wing energy collection performance; the replaceable buckle structure is used for conveniently replacing different elastic films to adapt to complex flow field conditions and realize efficient development of low-quality fluid kinetic energy. The flapping wing power generation device transmits the blade sinking and floating movement and pitching movement kinetic energy to the power output device, and then converts the kinetic energy into electric energy to input into a power grid.

Description

TECHNICAL FIELD

[0001] The present application relates to a flapping wing power generation device with replaceable ball socket buckle and its working method, belonging to the field of energy conversion, for the utilization of ocean energy, river energy and the application of oscillating flapping wing energy collection. BACKGROUND

[0002] In recent years, with the continuous development of world economy, the industrialization degree of various countries is getting higher and higher, and the required power resources in production and manufacturing links continue to rise. In order to meet the demand for electricity, traditional thermal power generation increases investment and output, which brings the decline of non-renewable energy reserves such as fossil fuels and environmental pollution, etc. This forces countries around the world to transform the energy production structure and promote the process of low-carbon power generation. At present, the development of clean and renewable energy such as ocean energy, solar energy and wind energy, and the continuous search for effective methods and technologies to improve energy utilization efficiency and reasonably develop clean energy have become technical problems that the world needs to solve.

[0003] The flapping wing power generation device collects the flow energy through the reciprocating oscillation of the blade in the water flow, and then converts it into electric energy, realizing the effective utilization of low-quality and high-dispersity fluid energy. The flapping wing blade structure is simple, the oscillation speed is low, and the running noise is small. Compared with the traditional water turbine, the flapping wing energy collection device has little disturbance to the nearby water organisms and ecological environment when it runs, and it belongs to the environment-friendly device. At the same time, the flapping wing energy collection device has low requirements for the application environment, and can perform excellent collection effect in special environments such as shoal, narrow water area and offshore, and has strong adaptability. It is one of the new energy utilization devices recognized as having great development potential in recent years.

[0004] The main structure of the existing flapping wing power generation device is a standard foil flapping wing blade, which is usually made of alloy material in one piece. In the running process, the optimal energy collection effect is obtained by adjusting the sink and float, pitch oscillation mode of the flapping wing in the flow field or by the interaction between multiple flapping wings. A series of flapping wing power generation devices using renewable energy have disclosed a series of flapping wing structure. This design uses a series of flapping wing arrangement to improve the flapping wing energy collection effect, but only considers the ordinary flapping wing profile structure, and does not involve the setting of ball socket and other flow control structures on the flapping wing surface, ignoring the promoting effect of flow control structure on the fluid flow characteristics of the flapping wing surface. Therefore, the flapping wing fluid energy collection capacity has not been fully developed.

[0005] Ocean energy, river energy and other fluid energy have huge energy base, which is formed by the action of gravity and solar radiation, and can be considered as an inexhaustible clean energy. However, under the influence of different weather, wind speed and other external conditions, the fluid has different flow rates and different fluid densities, forming natural phenomena such as tides and ocean currents. If a fixed wing structure is used, it cannot adapt to the performance changes of the external fluid, and will not be able to fully collect the kinetic energy contained in the fluid during special natural phenomena, resulting in waste of fluid energy and reducing the energy output rate of the flapping wing power generation device, leading to a decrease in the adaptability of the device.

[0006] Based on the route policy of sustainable development in China, it has become a consensus to reasonably and fully utilize ocean energy, river energy and other clean energy to alleviate the pressure of thermal power generation and reduce the consumption of non-renewable energy. In the ocean or river, it is necessary to adapt to the local conditions, break the limitations of the traditional flapping wing structure, enhance the output power of the flapping wing power generation device based on the flow control structure, and ensure the adaptability of the flapping wing device in complex and variable fluid environment through replaceable buckle structure, which is of great significance to improve the utilization efficiency of ocean energy and river energy by flapping wing power generation device. SUMMARY

[0007] In order to overcome the problems existing in the prior art, the purpose of the present application is to provide a flapping wing power generation device with replaceable ball socket buckle and a working method thereof. The flapping wing power generation device can be used in the ocean, river, offshore shoal or narrow waterway, and can utilize the self-adaptive concave ball socket structure formed by the impact of the elastic film material on the fluid to enhance the strength and size of the flapping wing surface vortex structure, improve the energy collection efficiency of the flapping wing device, and realize effective flow control under different flow conditions by replacing the buckle structure. The flapping wing power generation device can fully collect the incoming flow energy, form an elastic self-adaptive ball socket structure, improve the energy collection efficiency through flow control, replace the elastic film material through the buckle structure, and has strong adaptability. At the same time, the flapping wing power generation device utilizes the self-adaptive deformation ball socket structure formed by the impact of the elastic film material on the fluid, has no additional flow control device, has the advantages of lightweight, simple structure and no occupation of external working space, and has obvious structural superiority when used in the ocean and river to collect fluid energy.

[0008] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0009] A flapping wing power generation device with replaceable ball socket buckle, comprising a flapping wing oscillation structure, a fixing and limiting structure, and a power transmission structure, wherein,

[0010] The flapping wing oscillation structure comprises a flapping wing blade, a ball socket buckle mounting hole, a second groove, a limiting groove, a ring buckle, a positioning sheet, an elastic film and a piezoresistive sensor.

[0011] The fixing and limiting structure comprises a first support, a second support, a first floating platform, a first limiting channel and a second limiting channel.

[0012] The power transmission structure comprises a flapping wing rotating shaft, a first groove, a rack, a gear, a gear rotating shaft, a first power output device, a second power output device and a second floating platform.

[0013] The leading edge surface of the flapping wing blade is provided with the ball socket buckle mounting hole, the edge of the ball socket buckle mounting hole is provided with the second groove, the limiting groove is rotationally formed on the side wall of the ball socket buckle mounting hole with the bottom surface of the second groove as the reference plane, the outer side edge of the ring buckle is fixedly connected with the positioning sheet, the inner side edge of the ring buckle is fixedly connected with the elastic film, the piezoresistive sensor is fixedly connected on the elastic film, the ball socket buckle structure is formed by the ring buckle, the positioning sheet, the elastic film and the piezoresistive sensor, and the ball socket buckle mounting hole is movably connected with the ring buckle with the positioning sheet.

[0014] The lower surface of the first floating platform is fixedly connected with the first support and the second support, the first limiting channel is formed on the first support, and the second limiting channel is formed on the second support; the flapping wing rotating shaft passes through the first limiting channel and the second limiting channel respectively and is movably connected with the first limiting channel and the second limiting channel respectively.

[0015] The flapping wing rotating shaft is fixedly connected with the flapping wing blade and extends outward from the two side end surfaces of the flapping wing blade, the flapping wing rotating shaft on one side is provided with the first groove, the first groove is fixedly connected with the rack, the gear rotating shaft passes through the first support and is movably connected with the first support, the gear rotating shaft is fixedly connected with the gear on one side, the gear rotating shaft is fixedly connected with the first power output device on the other side, and the flapping wing rotating shaft and the gear rotating shaft are driven through the gear and rack transmission mechanism; the flapping wing rotating shaft on the other side is fixedly connected with the second power output device, and the second power output device is fixedly connected with the second floating platform.

[0016] The first power output device and the second power output device are a gearbox or a generator.

[0017] The elastic film is deformed inwardly under the impact of fluid, the self-adapting ball socket structure beneficial to the formation of the flapping wing surface vortex is formed, the flow control of the surface fluid is realized, and the energy collection performance of the flapping wing device is enhanced.

[0018] The piezoresistive sensor is arranged on the elastic film to determine the deformation degree of the elastic film in real time.

[0019] The further improvement of the present application is that the elastic film is provided with film materials with different elastic modulus and thickness to form effective ball socket structure under different flow conditions and realize full utilization of fluid energy.

[0020] The further improvement of the present application is that the annular buckle is movably installed in the limiting groove by the positioning sheet to facilitate dismounting and replacement.

[0021] The further improvement of the present application is that the first limiting channel on the first support and the second limiting channel on the second support are symmetrically arranged.

[0022] The further improvement of the present application is that the gear and rack transmission mechanism comprises a rack fixed on the flapping wing rotating shaft and a gear fixed on the gear rotating shaft, and the rack and the gear are engaged to form the gear and rack transmission mechanism.

[0023] The further improvement of the present application is that the first floating platform floats on the water surface during operation, and the flapping wing power generation main structure operates underwater near the water surface.

[0024] The further improvement of the present application is that the second floating platform provides buoyancy support for the second power output device.

[0025] Compared with the prior art, the flapping wing power generation device with replaceable ball socket buckle provided by the present application mainly differs in that renewable ocean energy and river energy are utilized, and the self-adaptive ball socket flow control structure is used to realize the purpose of improving energy collection efficiency. The flapping wing power generation device with replaceable ball socket buckle provided by the present application utilizes green and clean ocean energy and river energy, and can be applied in various water environments. The self-adaptive ball socket flow control structure is formed by the deformation of the elastic film under the impact of the incoming flow. The replaceable ball socket buckle structure is designed. The pressure resistance sensor is used to feed back the deformation of the elastic film in real time. The gear and rack transmission mechanism is used to collect the sinking and floating oscillation kinetic energy of the flapping wing. The whole device operates in the water area close to the water surface with the help of the floating platform. The present application has the following advantages:

[0026] 1. The device can effectively utilize green and clean energy. The fluid kinetic energy in the ocean and river is collected through the sinking and floating oscillation coupling of the flapping wing blades to realize the conversion from fluid kinetic energy with high dispersion and low quality to electric energy. No fossil fuel is consumed, and no environmental pollution exists in the conversion process. With the help of the floating platform structure, the working area of the device is close to the water surface. Not only can the device collect more fluid kinetic energy in the water area close to the water surface to realize self-starting in the oscillation process, but also can save the fixed device on the seabed and riverbed, simplify the device structure, and improve the economic performance. The device has good adaptability in various water environments such as shoal, offshore coast, narrow water area, ocean and river.

[0027] 2、The device utilizes the characteristics of elastic film material, in the process of flapping oscillation, the elastic film is impacted by fluid and deformed concave, thus forming adaptive ball socket structure on the surface of flapping wing, which is related to the flow condition, realizing the flow control effect, which makes full use of the hollow structure of flapping wing blade, without occupying external space, without additional flow control mechanism, simple structure and low cost; the ball socket structure aggravates the flow separation of fluid on the surface of flapping wing, forming vortex structure with stronger intensity and larger scale, thus enhancing the fluid energy collection effect and efficiency of flapping wing blade, and improving the utilization rate of fluid kinetic energy.

[0028] 3、The deformation degree of the elastic film of the device is different under different fluid flow rates, impact angles and other flow conditions, forming ball socket structures with different sizes and shapes, which has the ability to adaptively adjust the flow control strength. At the same time, elastic film materials with various elastic modulus and thickness can be configured, and the elastic film material can be adjusted in time according to natural phenomena such as ocean currents, tides and weather changes, so as to fully develop the fluid kinetic energy under variable flow conditions.

[0029] 4、The ball socket buckle structure with elastic film is designed, which is installed through the cooperation between the positioning sheet and the limiting groove, and is convenient to disassemble, replace and maintain.

[0030] 5、The piezoresistive sensor is used to monitor the deformation of the elastic film in real time, and the elastic film material is adjusted efficiently and reasonably according to the feedback data.

[0031] 6、The power generation device of the application has simple overall structure, light weight, low blade oscillation speed, no noise, and small disturbance to environment and organisms. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1(a) and Fig. 1(b) are schematic diagrams of three-dimensional and top view of flapping wing power generation device with replaceable ball socket buckle, Fig. 1(c) and Fig. 1(d) are schematic diagrams of partial structure of flapping wing power generation device with replaceable ball socket buckle;

[0033] Fig. 2(a), Fig. 2(b) and Fig. 2(c) are schematic diagrams of ball socket buckle installation hole, ball socket buckle structure and ball socket buckle and its cooperation relationship;

[0034] Fig. 3(a), Fig. 3(b), Fig. 3(c) and Fig. 3(d) are schematic diagrams of ball socket buckle structure deformation under different elastic film deformation conditions.

[0035] In the figure: 1 is the first support, 2 is the second support, 3 is the flapping shaft, 4 is the flapping blade, 5 is the first floating platform, 6 is the first limiting channel, 7 is the second limiting channel, 8 is the rack, 9 is the gear, 10 is the gear shaft, 11 is the first groove, 12 is the first power output device, 13 is the second power output device, 14 is the second floating platform, 15 is the ball socket buckle mounting hole, 16 is the second groove, 17 is the limiting groove, 18 is the ring-shaped buckle, 19 is the positioning piece, 20 is the elastic film, and 21 is the piezoresistive sensor. DETAILED DESCRIPTION

[0036] The application will be further described in detail below with reference to the accompanying drawings.

[0037] Referring to the schematic diagrams of the device at two different angles, FIG. 1(a) and FIG. 1(b), and the partial enlarged view of the device, FIG. 1(c) and FIG. 1(d), the flapping power generation device with replaceable ball socket buckle of the application comprises a flapping oscillation structure, a fixing and limiting structure, and a power transmission structure.

[0038] The flapping oscillation structure comprises a flapping blade 4, a ball socket buckle mounting hole 15, a second groove 16, a limiting groove 17, a ring-shaped buckle 18, a positioning piece 19, an elastic film 20, and a piezoresistive sensor 21. The ball socket buckle mounting hole 15 is formed on the leading edge surface of the flapping blade 4, the second groove 16 is formed on the edge of the ball socket buckle mounting hole 15, the limiting groove 17 is formed on the side wall of the ball socket buckle mounting hole 15 with the bottom surface of the second groove 16 as the reference plane, the positioning piece 19 is fixedly connected to the outer edge of the ring-shaped buckle 18, the ring-shaped buckle 18 is fixedly connected to the inner edge of the elastic film 20, the piezoresistive sensor 21 is fixedly connected to the elastic film 20, forming a ball socket buckle structure, i.e., the ball socket buckle structure is composed of the ring-shaped buckle 18, the positioning piece 19, the elastic film 20, and the piezoresistive sensor 21; the ball socket buckle mounting hole 15 and the ball socket buckle structure are movably connected through the mutual cooperation of the positioning piece 19 and the limiting groove 17.

[0039] The fixing and limiting structure comprises a first support 1, a second support 2, a first floating platform 5, a first limiting channel 6, and a second limiting channel 7. The first support 1 and the second support 2 are fixedly connected to the lower surface of the first floating platform 5, the first limiting channel 6 is formed on the first support 1, and the second limiting channel 7 is formed on the second support 2; the flapping shaft 3 passes through the first limiting channel 6 and the second limiting channel 7 on both sides and is movably connected to the first limiting channel 6 and the second limiting channel 7, respectively.

[0040] The power transmission structure comprises a flapping shaft 3, a first groove 11, a rack 8, a gear 9, a gear shaft 10, a first power output device 12, a second power output device 13 and a second floating platform 14. The flapping shaft 3 is fixedly connected with the flapping blade 4 and extends outward from the flapping blade 4 at both sides of the end surface. The flapping shaft 3 at one side is provided with the first groove 11, and the first groove 11 is fixedly connected with the rack 8. The gear shaft 10 passes through the first support 1 and is movably connected with the first support 1. The gear shaft 10 at one side is fixedly connected with the gear 9, and the gear shaft 10 at the other side is fixedly connected with the first power output device 12. The flapping shaft 3 and the gear shaft 10 are driven by the gear and rack transmission mechanism. The flapping shaft 3 at the other side is fixedly connected with the second power output device 13, and the second power output device 13 is fixedly connected with the second floating platform 14.

[0041] In operation, the first floating platform 5 floats on the water surface, and the first support 1 and the second support 2 fixedly connected with the first floating platform 5 are suspended below the horizontal plane. The flapping power generation main structure composed of the flapping oscillation structure and the power transmission structure movably connected with the first support 1 and the second support 2 is suspended in the water area close to the water surface to collect fluid energy. The axis direction of the flapping shaft 3 is perpendicular to the fluid flow direction. In the initial state, the flapping blade 4 is located in the water area with large fluid kinetic energy close to the horizontal plane. The fluid flows through the surface of the flapping blade 4 to form a leading edge vortex structure on the suction surface of the flapping blade 4. The leading edge vortex gradually develops under the action of the flow and moves to the trailing edge of the flapping blade 4 to form a shedding vortex. The negative pressure area appears on the surface of the trailing edge of the flapping blade, and the pressure difference is formed between the suction surface and the pressure surface of the flapping blade 4. The flapping blade 4 starts the sinking and floating movement perpendicular to the horizontal plane and the pitching movement around the flapping shaft 3 under the action of the pressure difference to realize the self-starting of the oscillation process under the action of the flow. In operation of the power generation device, the ball socket buckle structure arranged on the leading edge of the flapping blade 4 is impacted by the fluid. The elastic film 20 on the ball socket buckle structure is deformed inward to the inside of the flapping blade 4 under the action of the water flow to form a self-adaptive ball socket structure related to the flow velocity and impact angle of the flow. The ball socket structure controls the flow of the fluid on the airfoil surface to strengthen the flow separation on the airfoil surface, so that the vortex structure with stronger intensity and larger size is formed when the fluid flows through the ball socket structure. Then, a larger range of low pressure area is formed when the vortex is shedded to increase the aerodynamic lift of the flapping blade 4 and improve the total amount and the collection efficiency of the flapping device.

[0042] The flapping blade 4 performs reciprocating sinking and floating movement and pitching movement in the flow field under the excitation of the shedding vortex, which drives the flapping shaft 3 to perform periodic linear movement and rotation. The two ends of the flapping shaft 3 pass through the first limiting channel 6 and the second limiting channel 7 respectively, which restricts the horizontal position and the movement range of the flapping shaft 3 and the flapping blade 4 in the vertical direction in the flow field. For the sinking and floating movement, when the flapping blade 4 oscillates from the highest position of the sinking and floating movement to the lowest position of the sinking and floating movement, that is, the flapping shaft 3 moves linearly from the upper end point to the lower end point of the first limiting channel 6 and the second limiting channel 7, the rack 8 fixed on the first groove 11 also moves linearly from the upper end point to the lower end point, and the linear movement of the rack 8 is converted into the rotation of the gear 9 through the gear and rack transmission mechanism. The gear 9 transmits the rotation kinetic energy to the first power output device 12 through the gear shaft 10 fixedly connected thereto, realizing the output of the sinking and floating oscillation kinetic energy of the flapping blade 4. Similarly, when the flapping blade 4 oscillates from the lowest position of the sinking and floating movement to the highest position of the sinking and floating movement, the rack 8 moves linearly in the same direction as the flapping blade 4, the gear 9 rotates in the opposite direction, and the kinetic energy is transmitted to the first power output device 12. That is, the reciprocating sinking and floating oscillation of the flapping blade 4 drives the gear shaft 10 to rotate reciprocally, and then drives the first power output device 12 connected to one end of the gear shaft 10 to output electric energy. For the pitching movement, the flapping blade 4 periodically reciprocates between the minimum pitching angle and the maximum pitching angle under the excitation of the shedding vortex, which drives the flapping shaft 3 to reciprocate periodically, and the rotation kinetic energy is transmitted to the second power output device 13 through the flapping shaft 3, realizing the output of the pitching oscillation kinetic energy of the flapping blade 4. The second floating platform 14 provides buoyancy support for the second power output device 13, eliminates the interference of the second power output device 13 on the movement of the flapping blade 4 due to its own weight, and avoids consuming the energy collected by the blade.

[0043] A ball socket buckle mounting hole 15 is provided on the leading edge surface of the flapping blade 4 for installing and fixing the ball socket buckle structure. During the operation of the flapping power generation device, the material of the elastic film 20 is selected according to the flow conditions of the current water area, so that the elastic film 20 is impacted by the surface fluid when the fluid flows through the blade surface, forming a reasonable structure and appropriate deformation of the ball socket structure. With the sinking and floating oscillation and the pitching oscillation of the flapping blade 4, the angle and intensity of the surface fluid impacting the elastic film 20 change constantly, and the elastic film 20 can adjust the deformation size and shape in real time according to the fluid flow conditions due to its material properties, forming a self-adaptive ball socket structure, realizing self-adaptive flow control of the surface fluid, and maximizing the fluid kinetic energy collection effect. At the same time, the cooperation of the ball socket buckle structure and the ball socket buckle mounting hole 15 realizes simple and convenient ball socket buckle installation and replacement, improving the structural environmental adaptability. The piezoresistive sensor 21 fixedly connected to the elastic film 20 monitors the deformation degree of the elastic film 20 in real time, adjusts the appropriate ball socket buckle structure through data feedback, and realizes precise flow control.

[0044] Fig. 2(a), Fig. 2(b) and Fig. 2(c) illustrate the matching relationship of the ball socket buckle mounting hole 15 and the ball socket buckle structure. The ball socket buckle structure includes a ring buckle 18, a positioning sheet 19, an elastic film 20 and a piezoresistive sensor 21, and the ball socket buckle structure can be configured with elastic film materials of different elastic modulus and thickness to adapt to various flow conditions and form an effective ball socket flow control structure. The bottom surface of the second groove 16 is in the same plane as the bottom surface of the limiting groove 17, and when the ball socket buckle structure is installed, the positioning sheet 19 enters the ball socket buckle mounting hole 15 from the second groove 16, and the ball socket buckle is rotated to make the positioning sheet 19 enter and be fixed in the limiting groove 17, thereby realizing the movable connection of the flapping wing blade 4 and the ball socket buckle structure. The buckle structure is convenient to disassemble and assemble, has good economic performance, and can be replaced with buckle structures with different elastic film materials according to flow conditions to improve the flapping wing energy harvesting performance.

[0045] Fig. 3(a), Fig. 3(b), Fig. 3(c) and Fig. 3(d) illustrate the ball socket buckle schematic diagram of the elastic film 20 in different deformation conditions. The inner side edge of the ring buckle 18 is fixedly connected with the elastic film 20, and the elastic film 20 of different ball socket buckle structures is provided with film materials of different materials, elastic modulus and thickness. At different flow rates, the impact force of the fluid flowing through the ball socket buckle on the elastic film 20 is different, the deformation degree of the elastic film 20 is different, and the ball socket structure of different sizes is formed; at different impact angles, the force angle of the fluid acting on the elastic film 20 is different, and the ball socket structure of different shapes is formed. The ball socket structure generated by the deformation of the elastic film 20 changes the deformation size according to the fluid flow condition, has self-adaptability, realizes efficient flow control of the fluid, and fully develops and harvests the flow energy.

[0046] When the entire flapping wing power generation device with the ball socket buckle structure is working, the huge ocean kinetic energy and river kinetic energy are utilized, the flapping wing blade is self-started by the shedding vortex formed by the fluid flowing through the surface of the flapping wing blade, the self-adaptive ball socket structure is formed by the fluid impact on the elastic film, the efficient flow control is realized, the buckle structure is adopted to facilitate the installation and replacement of different elastic films to adapt to complex flow field conditions, the fluid kinetic energy is fully tapped, the gear and rack transmission mechanism and the flapping wing shaft are used to realize the transmission of the blade sinking and oscillation and pitching oscillation kinetic energy to the power output device, and then the kinetic energy is converted into electric energy to input into the power grid, thereby realizing the efficient development of low-quality fluid kinetic energy.

Claims

1. A flapping wing power plant with replaceable ball socket clasp, characterized in that, It comprises a flapping oscillation structure, a fixing and limiting structure and a power transmission structure, wherein, The flapping oscillation structure comprises a flapping blade, a ball socket buckle mounting hole, a second groove, a limiting groove, a ring buckle, a positioning sheet, an elastic film and a piezoresistive sensor. The fixing and limiting structure comprises a first support, a second support, a first floating platform, a first limiting channel and a second limiting channel. The power transmission structure comprises a flapping shaft, a first groove, a rack, a gear, a gear shaft, a first power output device, a second power output device and a second floating platform. The leading edge surface of the flapping blade is provided with a ball socket buckle mounting hole, the edge of the ball socket buckle mounting hole is provided with a second groove, the limiting groove is rotationally formed on the side wall of the ball socket buckle mounting hole based on the bottom surface of the second groove as a reference plane, the outer edge of the ring buckle is fixedly connected with the positioning sheet, the inner edge of the ring buckle is fixedly connected with the elastic film, and the piezoresistive sensor is fixedly connected on the elastic film; the ball socket buckle mounting hole is movably connected with the ring buckle with the positioning sheet. The first floating platform is fixedly connected with the first support and the second support on the lower surface, the first limiting channel is formed on the first support, and the second limiting channel is formed on the second support; the flapping shaft passes through the first limiting channel and the second limiting channel on both sides respectively and is movably connected with the first limiting channel and the second limiting channel respectively. The flapping shaft is fixedly connected with the flapping blade and extends outward from both side end surfaces of the flapping blade, the flapping shaft on one side is provided with the first groove, the first groove is fixedly connected with the rack, the gear shaft passes through the first support and is movably connected with the first support, the gear shaft is fixedly connected with the gear on one side, the gear shaft is fixedly connected with the first power output device on the other side, and the flapping shaft and the gear shaft are driven through the gear-rack transmission mechanism; the flapping shaft on the other side is fixedly connected with the second power output device, and the second power output device is fixedly connected with the second floating platform.

2. A flapping wing power generation device with replaceable ball socket buckle according to claim 1, characterized in that, The first power output device and the second power output device are gearboxes or generators.

3. A flapping wing power generation device with replaceable ball socket buckle according to claim 1, characterized in that, The elastic film is deformed inwardly under the impact of fluid, thereby forming an adaptive ball socket structure that is beneficial to the formation of a vortex on the surface of the flapping blade, realizing the flow control of the surface fluid and enhancing the energy collection performance of the flapping device.

4. A flapping wing power plant with replaceable ball socket buckle according to claim 1, characterized in that, The piezoresistive sensor is arranged on the elastic film to determine the deformation degree of the elastic film in real time.

5. A flapping wing power plant with replaceable ball socket buckle according to claim 1, characterized in that, The elastic film is arranged with film materials of different elastic modulus and thickness to form effective ball socket structures under different flow conditions, thereby realizing the full utilization of fluid energy.

6. A flapping wing power generation device with replaceable ball socket buckle according to claim 1, characterized in that, The ring buckle is movably installed in the limiting groove through the positioning sheet, so as to be disassembled and replaced.

7. A flapping wing power generation device with replaceable ball socket buckle according to claim 1, characterized in that, The first limiting channel formed on the first support and the second limiting channel formed on the second support are symmetrically arranged.

8. A flapping wing power generation device with replaceable ball socket buckle according to claim 1, characterized in that, The gear-rack transmission mechanism comprises the rack fixed on the flapping shaft and the gear fixed on the gear shaft, and the rack and the gear are engaged to form the gear-rack transmission mechanism.

9. A flapping wing power generation device with replaceable ball socket buckle according to claim 1, characterized in that, The second floating platform provides buoyancy support for the second power output device.

10. A method of operating a flapping wing generator with replaceable ball socket clasp as defined in any one of claims 1 to 9, characterized in that, The power generation device works, the first floating platform floats on the water surface, and the first support and the second support fixedly connected with the first floating platform suspend below the horizontal plane, the flapping wing power generation main structure composed of the flapping wing oscillation structure and the power transmission structure movably connected on the first support and the second support suspends in the water area close to the water surface to collect fluid energy, and the axis direction of the flapping wing rotating shaft is perpendicular to the fluid flow direction; in the initial state, the flapping wing blade is located in the water area with large fluid kinetic energy close to the horizontal plane, the fluid flows through the surface of the flapping wing blade, the leading edge vortex structure is formed on the suction surface of the flapping wing blade, the leading edge vortex gradually develops under the action of the flow and moves to the trailing edge of the flapping wing blade to form a shedding vortex, the negative pressure area appears on the surface of the trailing edge of the flapping wing blade, the pressure difference is formed between the suction surface and the pressure surface of the flapping wing blade, the flapping wing blade starts the sinking and floating movement perpendicular to the horizontal plane and the pitching movement around the flapping wing rotating shaft under the action of the pressure difference, and the oscillation process under the action of the flow is self-started; the ball socket buckle structure arranged on the leading edge of the flapping wing blade is impacted by the fluid, the elastic film is deformed inwardly to the inside of the flapping wing blade under the action of the water flow, and the self-adaptive ball socket structure related to the flow velocity and the impact angle of the flow is formed on the surface of the blade leading edge; the self-adaptive ball socket structure controls the flow of the fluid on the airfoil surface, strengthens the flow separation of the airfoil surface, and makes the fluid flow through the ball socket structure to form a vortex structure with stronger strength and larger size, thereby forming a larger range of low pressure area when the vortex is shed, increasing the aerodynamic lift of the flapping wing blade, and improving the total amount and the collection efficiency of the flapping wing device energy collection; the sinking and floating movement and the pitching movement of the flapping wing blade drive the flapping wing rotating shaft to perform periodic linear motion and rotary motion; for the sinking and floating movement, when the flapping wing blade oscillates from the highest position of the sinking and floating movement to the lowest position of the sinking and floating movement, that is, the flapping wing rotating shaft moves linearly from the upper end point to the lower end point of the first limiting channel and the second limiting channel, the rack fixed on the first groove is driven by the flapping wing rotating shaft to move linearly from the upper end point to the lower end point, and the linear motion of the rack is converted into the rotation of the gear through the gear and rack transmission mechanism; the gear transmits the rotary kinetic energy to the first power output device through the gear shaft fixedly connected with the gear, and the output of the sinking and floating oscillation kinetic energy of the flapping wing blade is realized; similarly, when the flapping wing blade oscillates from the lowest position of the sinking and floating movement to the highest position of the sinking and floating movement, the rack is driven to move linearly in the same direction as the flapping wing blade, the gear rotates reversely, and kinetic energy is transmitted to the first power output device; that is, the reciprocating sinking and floating oscillation of the flapping wing blade drives the reciprocating rotation of the gear shaft, and then drives the first power output device connected to one end of the gear shaft to output electric energy; for the pitching movement, the flapping wing blade reciprocates periodically in the interval from the minimum pitching angle to the maximum pitching angle under the excitation of the shedding vortex, drives the flapping wing rotating shaft to reciprocate periodically, and transmits the rotary kinetic energy to the second power output device through the flapping wing rotating shaft, and the output of the pitching movement kinetic energy of the flapping wing blade is realized.

Images