Wind energy collecting device

Abstract

The invention discloses a wind energy collecting device which comprises a wind turbine assembly and a triboelectricity-electromagnetism composite generator. The wind turbine assembly at least comprises a main shaft, a plurality of fan blades, push rods and first gears, wherein the push rods and the first gears are the same as the fan blades in number. The fan blades are annularly arranged on the outer side of the main shaft and can rotate around the main shaft, and each fan blade is inserted into a groove in one end of the corresponding push rod through a protruding key on the outer side of the fan blade to be connected with one end of the corresponding push rod. The other end of the push rod is fixedly connected with a corresponding first gear; each first gear is meshed with a second gear which is fixedly sleeved on the main shaft; and the main shaft is connected with the kinetic energy transmission end of the triboelectricity-electromagnetism composite generator. According to the wind energy collecting device, the pneumatic performance and the energy capturing efficiency of the fan are improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind energy power generation, and in particular to a wind energy collecting device. Background Art

[0002] As the global demand for clean energy continues to increase, wind energy, as a renewable and pollution-free energy source, has received extensive attention and research. Traditional large-scale wind power generation devices can efficiently convert wind energy into electrical energy in high wind speed environments, but in light wind environments (usually wind speeds below 3-5m / s), they are difficult to start and have low power generation efficiency, making it impossible to fully utilize the abundant light wind energy resources.

[0003] In some specific application scenarios, such as meteorological monitoring stations in remote areas, distributed sensor networks, and IoT devices, a continuous and stable power supply is required. However, due to geographical and environmental constraints, it is difficult to access the traditional power grid. These devices usually have low power requirements and are suitable for power supply by small wind energy collection devices. Existing small wind energy collection devices also have many problems in light wind environments.

[0004] However, in the prior art, small wind energy collection devices mostly use a fixed pitch design, where the blades have a fixed windward angle. When the wind speed is below a critical value (usually ≥4-5m / s), the torque generated by the blades is insufficient to drive the generator to start. In a breeze environment (such as between urban buildings and in forests), the wind speed is often in the range of 1-3m / s, causing the device to be in a "standby" state for a long time.

[0005] It can be seen that how to improve the existing wind energy collection device to improve the collection efficiency of micro-wind energy has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0006] The present invention provides a wind energy collecting device to solve the technical problem of how to improve the existing wind energy collecting device to achieve the effect of improving the collection efficiency of micro-wind energy.

[0007] In order to solve the above technical problems, an embodiment of the present invention provides a wind energy collection device, characterized in that it includes a wind turbine assembly and a triboelectric-electromagnetic composite generator;

[0008] The wind turbine assembly at least comprises a main shaft, a number of wind turbine blades, and a number of push rods and a first gear equal to the number of the wind turbine blades;

[0009] The fan blades are arranged on the outside of the main shaft and can rotate around the main shaft. Each of the fan blades is connected to the corresponding end of the push rod by inserting a protruding key on the outside of the fan blade into a groove at one end of the push rod.

[0010] The other end of the push rod is fixedly connected to the corresponding first gear;

[0011] Each of the first gears is meshed with a second gear fixedly disposed on the outer side of the main shaft;

[0012] The main shaft is connected to the kinetic energy transmission end of the friction electric-electromagnetic composite generator.

[0013] As one of the preferred solutions, the wind turbine assembly also includes a top cover and a rotating support seat, the top cover is fixedly arranged on the top end of the main shaft, the rotating support seat is fixedly sleeved on the main shaft and the second gear is located on the lower end surface of the rotating support seat.

[0014] As one of the preferred schemes, the upper end surface of the rotating support seat and the lower end surface of the top cover are both provided with a cylindrical groove, and the inner side of the fan blade is provided with a cylindrical raised key matching the groove, and the fan blade is rotated around the main axis through the cooperation of the cylindrical raised key and the cylindrical groove.

[0015] As one of the preferred solutions, the fan blade is made of carbon fiber composite material and has an aerodynamically optimized cross-section.

[0016] As one of the preferred solutions, the number of the fan blades is at least 3, and the fan blades are evenly arranged on the outside of the main shaft.

[0017] As one of the preferred solutions, the variable pitch angle range of the wind turbine blades is 0° to 45°, and the gear ratio between the first gear and the second gear is 1:3 to 1:4.

[0018] As one preferred solution, the triboelectric-electromagnetic composite generator includes a magnet mounting cover, a FEP film, a coil mounting cover, a bottom cover and an acrylic substrate;

[0019] The magnet mounting cover is fixedly connected to the rotating support seat, and the FEP film is fixed to the bottom surface of the magnet mounting cover by a clamp; the coil mounting cover is fixedly connected to the main shaft and is provided with a coil mounting concave platform;

[0020] The rotating support seat, the FEP film and the coil mounting cover all rotate with the main shaft;

[0021] The acrylic substrate is fixed to the bottom cover and is located directly below the FEP film, and a plurality of sector-shaped copper foils are arranged at equal angles on the upper surface of the acrylic substrate.

[0022] As one of the preferred solutions, the top of the magnet mounting cover is provided with NdFeB permanent magnets distributed in a circular array, and the magnetic poles of adjacent permanent magnets are arranged alternately;

[0023] An excitation coil corresponding to the permanent magnet is installed in the coil installation recess.

[0024] As one preferred solution, the sector-shaped copper foils are separated by insulating grooves, and adjacent copper foils are connected in series via back conductors.

[0025] As one of the preferred solutions, the friction electric-electromagnetic composite generator also includes a mounting cover, and the mounting cover is buckled with the bottom cover through a boss on the bottom cover to form a closed power generation space.

[0026] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0027] (1) The present invention uses a variable pitch mechanism composed of a push rod, a first gear, a second gear, etc., so that the wind turbine blades can adjust the pitch angle in real time according to the wind speed and wind direction. At low wind speeds, the blades are adjusted to a suitable angle to capture more wind energy; at high wind speeds, the blade angle is adjusted to maintain a low wind resistance state to prevent the wind turbine from being subjected to excessive force, thereby improving the wind energy utilization efficiency, protecting the device, and expanding the applicable wind speed range of the device.

[0028] (2) The triboelectric-electromagnetic composite generator proposed in the present invention integrates the functions of a triboelectric nanogenerator (TENG) and an electromagnetic generator (EMG). TENG is composed of a FEP film and a copper foil on an acrylic substrate, and can efficiently convert mechanical energy into electrical energy under low-frequency, small-amplitude mechanical motion (such as a breeze); EMG is composed of a magnet and a coil, and has a higher power generation efficiency under high-frequency, large-amplitude mechanical motion (such as a strong wind). The combination of the two achieves efficient power generation under different wind speed conditions, significantly improves the energy capture efficiency of the system under various environments, and ensures stable power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a wind energy collection device in one embodiment of the present invention;

[0030] Figure 2 is an exploded schematic diagram of a wind turbine assembly in one embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of a top cover structure in one embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of the structure of a fan blade in one embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of a rotating support seat in one embodiment of the present invention;

[0034] Figure 6 It is a schematic diagram of the push rod structure in one embodiment of the present invention;

[0035] Figure 7 is a schematic diagram of the structure of a fixed base in one embodiment of the present invention;

[0036] Figure 8 is a schematic diagram of the structure of a power generation component in one embodiment of the present invention;

[0037] Fig. 9 is a schematic diagram of the bottom layout of a power generation assembly in one embodiment of the present invention;

[0038] Reference numerals:

[0039] Among them, 100, wind turbine assembly; 200, generator assembly; 110, top cover; 120, wind turbine blades; 130, main shaft; 140, rotating support seat; 150, first gear; 160, push rod; 170, fixed base; 171, bearing; 172, second gear; 210, magnet placement cover; 220, FEP fixture; 230, FEP film; 240, coil placement cover; 250, acrylic substrate; 260, bottom cover; 270, bolts; 280, nuts; 290, mounting cover; 291, mounting holes; 121, 122, 123, raised keys; 111, 141, 151, 152, 161, 162, 171, mounting holes. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of this application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are only for illustrative purposes, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0044] An embodiment of the present invention provides a wind energy collection device. For details, see Figure 1 , Figure 1 It is a schematic structural diagram of a wind energy collection device in one embodiment of the present invention, which includes a wind turbine assembly 100 and a triboelectric-electromagnetic composite generator 200;

[0045] The wind turbine assembly at least comprises a main shaft, a number of wind turbine blades, and a number of push rods and a first gear equal to the number of the wind turbine blades;

[0046] The fan blades are arranged on the outside of the main shaft and can rotate around the main shaft. Each of the fan blades is connected to the corresponding end of the push rod by inserting a protruding key on the outside of the fan blade into a groove at one end of the push rod.

[0047] The other end of the push rod is fixedly connected to the corresponding first gear;

[0048] Each of the first gears is meshed with a second gear fixedly disposed on the outer side of the main shaft;

[0049] The main shaft is connected to the kinetic energy transmission end of the friction electric-electromagnetic composite generator.

[0050] Among them, the variable pitch angle blades will rotate around the axis under the action of wind due to the non-fixed axial direction, and at the same time drive the movement of the push rod and the bevel gear. The design of this structure can adjust the pitch angle of the fan blades according to the wind direction and wind speed, so that the upwind fan blades can capture more wind, while keeping the downwind fan blades in a low wind resistance state, so as to improve the aerodynamic performance of the fan.

[0051] Specifically, Figure 2 As shown, Figure 2 1 is a schematic diagram of an exploded view of a wind turbine assembly in one embodiment of the present invention, wherein the wind turbine assembly 100 includes a top cover 110, a wind turbine blade 120, a main shaft 130, a rotating support seat 140, a bevel gear 150, a push rod 160 and a fixed base 170. The main shaft 130 is fixedly connected to the top cover 110 and the rotating support seat 140, and is connected to the fixed base 170 via a bearing 171.

[0052] Under the action of wind, the variable pitch angle blades rotate around the axis due to the axial non-fixity. The rotation of the blades drives the push rod 160 to move, and the push rod 160 in turn drives the bevel gear 150 to rotate. Since the bevel gear 150 is meshed with the gear 172 on the fixed base 170, under this transmission relationship, the wind turbine blades can adaptively adjust the pitch angle according to the wind speed and wind direction. In this way, the wind turbine blades in the upwind direction can capture more wind energy, and the wind turbine blades in the downwind direction can maintain low wind resistance, thereby improving the overall aerodynamic performance of the wind turbine and improving the efficiency of wind energy utilization. Afterwards, the main shaft 130 transfers the kinetic energy of rotation to the friction electric-electromagnetic composite generator 200 to realize the conversion of mechanical energy into electrical energy.

[0053] Preferably, in one embodiment of the present invention, the wind turbine assembly further includes a top cover and a rotating support seat, the top cover is fixedly disposed on the top end of the main shaft, the rotating support seat is fixedly sleeved on the main shaft and the second gear is located on the lower end surface of the rotating support seat.

[0054] For details, see Figure 3 , Figure 4 , Figure 5 ,in, Figure 3 is a schematic diagram of a top cover structure in one embodiment of the present invention, Figure 4 is a schematic diagram of the fan blade structure in one embodiment of the present invention, Figure 5 It is a schematic diagram of the structure of a rotating support seat in one embodiment of the present invention.

[0055] In one embodiment of the present invention, the top cover 110 is disposed at the top of the main shaft 130, which not only plays a protective role, but also provides a connection basis for other components. The rotating support seat 140 is fixedly sleeved on the main shaft 130, and the gear 172 on the fixed base 170 as the second gear is located on the lower end surface of the rotating support seat 140. This layout makes the meshing of the first gear (bevel gear 150) and the second gear (gear 172) more stable, ensuring efficient transmission of power.

[0056] The upper end surface of the rotating support seat 140 and the lower end surface of the top cover 110 are both provided with cylindrical grooves, and the inner side of the fan blade 120 is provided with matching cylindrical raised keys, such as raised keys 121 and 122. It is through the cooperation of these cylindrical raised keys and cylindrical grooves that the fan blade 120 can achieve flexible rotation around the main shaft 130. This connection method not only ensures the stability of the blade during rotation, but also facilitates installation and later maintenance, so that the blade can smoothly adjust the angle under different wind speed and wind direction conditions.

[0057] Preferably, in one embodiment of the present invention, the upper end surface of the rotating support seat and the lower end surface of the top cover are both provided with a cylindrical groove, and the inner side of the fan blade is provided with a cylindrical raised key matching the groove, and the fan blade is rotated around the main axis through the cooperation of the cylindrical raised key and the cylindrical groove.

[0058] For details, see Figure 6 , Figure 7 .in Figure 6 is a schematic diagram of the push rod structure in one embodiment of the present invention, Figure 7 It is a schematic diagram of the fixed base structure in one embodiment of the present invention.

[0059] Specifically, the raised key 121 on the fan blade 120 cooperates with the mounting hole 111 set on the top cover 110, and the raised key 122 cooperates with the mounting hole 141 set on the rotating support seat 140, which can fix and limit the movement of the fan blade 120 so that it can only rotate around the axis. The mounting hole 151 is set on the bevel gear 150 and can be fixed on the rotating support seat 140 with bolts and nuts. The bevel gear 150 is provided with a mounting hole 152, and the push rod 160 is provided with a mounting hole 161. The two are connected by a bearing and a shaft to ensure that the push rod 160 rotates around the axis. The raised key 123 on the fan blade 120 is connected with the mounting hole 162 set on the push rod 160 to maintain the relative rotation of the two. A gear 172 is set on the fixed base 170, and the mounting hole 171 at the bottom is used in conjunction with the mounting hole 291 on the mounting cover 290 through bolts and nuts to fix the wind turbine assembly 100. When the wind drives the wind turbine assembly 100, the gear 172 set on the fixed base 170 is fixed, while the rotating support base 140 is connected to the bevel gear 150 through bearings and shafts to maintain relative rotation. The bevel gear 150 drives the wind turbine blades through the push rod 160 and the raised key 123 to make adaptive pitch angle changes according to wind speed, wind direction and other conditions, so as to maximize the aerodynamic performance of the system and the utilization efficiency of wind energy.

[0060] Preferably, in one embodiment of the present invention, the fan blade is made of carbon fiber composite material and has an aerodynamically optimized cross-section.

[0061] Preferably, in one embodiment of the present invention, the number of the fan blades is at least 3, and the fan blades are evenly arranged on the outer side of the main shaft.

[0062] Specifically, the wind turbine blades 120 are made of carbon fiber composite materials, which are high in strength and light in weight, and can effectively reduce the weight of the entire device and improve the wind energy conversion efficiency. At the same time, the blades have an aerodynamically optimized cross-section, which can reduce wind resistance and increase lift. Even in a breeze, they can efficiently capture wind energy and significantly improve the startup performance and power generation efficiency of the device.

[0063] The number of the fan blades 120 is at least 3, and they are evenly arranged on the outside of the main shaft 130 (see Figure 2 ). The multi-blade design can make fuller use of wind energy, and the uniform layout can balance the force on the device, reduce vibration and noise during operation, ensure stable operation of the device, and thus improve the stability and reliability of power generation.

[0064] Preferably, in an embodiment of the present invention, the variable pitch angle range of the wind turbine blades is 0° to 45°, and the gear ratio between the first gear and the second gear is 1:3 to 1:4.

[0065] The variable pitch angle range of the wind turbine blade 120 is set between 0° and 45°. Within this range, the blade can adapt to a variety of wind speeds and wind directions. In a light wind environment, the blade can be adjusted to a suitable angle to capture wind energy; in strong winds, the angle can be adjusted to reduce wind resistance and protect the device.

[0066] The connection point between the push rod 160 and the fan blade 120 needs to be adjusted according to the size of the blade to ensure that the blade can adjust its angle quickly and accurately according to the wind speed and wind direction, thereby improving the efficiency of wind energy utilization.

[0067] The gear ratio of the first gear (helical gear 150) to the second gear (gear 172) is 1:3-1:4. This gear ratio can flexibly adjust the blade speed and angle according to the wind speed while ensuring transmission stability, so that the blade can achieve optimal aerodynamic performance at different wind speeds and realize efficient wind energy capture.

[0068] Preferably, in one embodiment of the present invention, the triboelectric-electromagnetic composite generator comprises a magnet mounting cover, a FEP film, a coil mounting cover, a bottom cover and an acrylic substrate;

[0069] The magnet mounting cover is fixedly connected to the rotating support seat, and the FEP film is fixed to the bottom surface of the magnet mounting cover by a clamp; the coil mounting cover is fixedly connected to the main shaft and is provided with a coil mounting concave platform;

[0070] The rotating support seat, the FEP film and the coil mounting cover all rotate with the main shaft;

[0071] The acrylic substrate is fixed to the bottom cover and is located directly below the FEP film, and a plurality of sector-shaped copper foils are arranged at equal angles on the upper surface of the acrylic substrate.

[0072] For details, see Figure 8 , Fig. 9 .in, Figure 8 is a schematic diagram of the structure of a power generation component in one embodiment of the present invention, Fig. 9 It is a schematic diagram of the bottom layout of a power generation component in one embodiment of the present invention.

[0073] The power generation component 200 includes a magnet placement cover 210, a FEP fixture 220, a FEP film 230, a coil placement cover 240, an acrylic substrate 250, a bottom cover 260 and a mounting cover 290. The main shaft 130 is fixedly connected to the magnet placement cover 210 and connected to the coil placement cover 240 through a bearing. When the wind turbine component 100 is driven by wind to rotate the main shaft 130, the magnet of the magnet placement cover 210 and the coil of the coil placement cover 240 move relative to each other, and the magnetic field generated by the magnet cuts the magnetic flux lines, and current is generated on the coil accordingly. The FEP fixture 220 is fixedly connected to the magnet placement cover 210, and the FEP film 230 is fixed by bolts 270 and nuts 280. The acrylic substrate 250 is spaced with grooves of equal angles, and copper foil tape is pasted on the top, and the copper foil is cut into sectors of the same shape through the grooves and separated from each other to maintain insulation. The FEP fixture 220 and the FEP film 230 rotate with the main shaft 130, and the copper foil and the FEP film 230 move relative to each other to form an independent layer TENG. Through friction electrification and electrostatic induction effects, alternating current is generated on the copper foil. The mounting cover 290 can be closed through the boss on the bottom cover 260 to include the power generation device.

[0074] Preferably, in one embodiment of the present invention, the top of the magnet mounting cover is provided with NdFeB permanent magnets distributed in a circular array, and the magnetic poles of adjacent permanent magnets are arranged alternately;

[0075] An excitation coil corresponding to the permanent magnet is installed in the coil installation recess.

[0076] The top of the magnet mounting cover 210 of the friction electric-electromagnetic composite generator 200 is provided with neodymium iron boron permanent magnets distributed in a circular array. This circular array distribution design can make the magnetic field distribution more uniform and regular. The magnetic pole directions of adjacent permanent magnets are arranged alternately. This arrangement allows the magnetic field to form an alternating magnetic field area in space. When the excitation coil corresponding to the permanent magnet (the coil in the coil placement cover 240) rotates with the main shaft, the magnetic flux lines can be cut more efficiently. Because of the alternation of the magnetic pole direction, the coil constantly experiences changes in the direction of the magnetic field during the rotation process, thereby generating a more stable and efficient induced current in the coil, greatly improving the efficiency of the electromagnetic power generation part.

[0077] Preferably, in one embodiment of the present invention, the fan-shaped copper foils are separated by insulating grooves, and adjacent copper foils are connected in series via back conductors.

[0078] The fan-shaped copper foil (copper foil pasted on the acrylic substrate 250) is separated by insulating grooves. This design ensures the electrical insulation between adjacent copper foils, avoids the occurrence of short circuits, and ensures the normal operation of the TENG part in the triboelectric-electromagnetic composite generator. At the same time, the adjacent copper foils are connected in series through the back wires. This series connection method can integrate the electrical energy generated by each fan-shaped copper foil for output, increase the voltage value of the electrical energy output, enhance the power generation effect of the TENG part, and make the electrical energy output of the entire composite generator more stable and effective.

[0079] Preferably, in one embodiment of the present invention, the friction electric-electromagnetic composite generator further comprises a mounting cover, and the mounting cover is buckled with the bottom cover via a boss on the bottom cover to form a closed power generation space.

[0080] The triboelectric-electromagnetic composite generator 200 also includes a mounting cover 290, which is buckled with the bottom cover through the boss on the bottom cover 260 to form a closed power generation space. Such a closed structure has multiple advantages. On the one hand, it can protect the internal power generation components, such as magnets, coils, FEP films, copper foils, etc., to prevent dust, water vapor and other external impurities from entering, affecting the power generation performance and equipment life; on the other hand, the closed structure can also play a certain electromagnetic shielding role, reducing the interference of internal electromagnetic signals to the outside world, and also reducing the impact of the external electromagnetic environment on the inside of the generator, ensuring the stability and reliability of the power generation process.

[0081] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0082] (1) The present invention uses a variable pitch mechanism composed of a push rod, a first gear, a second gear, etc., so that the wind turbine blades can adjust the pitch angle in real time according to the wind speed and wind direction. At low wind speeds, the blades are adjusted to a suitable angle to capture more wind energy; at high wind speeds, the blade angle is adjusted to maintain a low wind resistance state to prevent the wind turbine from being subjected to excessive force, thereby improving the wind energy utilization efficiency, protecting the device, and expanding the applicable wind speed range of the device.

[0083] (2) The triboelectric-electromagnetic composite generator proposed in the present invention integrates the functions of a triboelectric nanogenerator (TENG) and an electromagnetic generator (EMG). TENG is composed of a FEP film and a copper foil on an acrylic substrate, and can efficiently convert mechanical energy into electrical energy under low-frequency, small-amplitude mechanical motion (such as a breeze); EMG is composed of a magnet and a coil, and has a higher power generation efficiency under high-frequency, large-amplitude mechanical motion (such as a strong wind). The combination of the two achieves efficient power generation under different wind speed conditions, significantly improves the energy capture efficiency of the system under various environments, and ensures stable power output.

[0084] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A wind energy collection device, characterized in that: It includes a wind turbine assembly and a triboelectric-electromagnetic composite generator; The wind turbine assembly at least comprises a main shaft, a number of wind turbine blades, and a number of push rods and a first gear equal to the number of the wind turbine blades; The fan blades are arranged on the outside of the main shaft and can rotate around the main shaft. Each of the fan blades is connected to the corresponding end of the push rod by inserting a protruding key on the outside of the fan blade into a groove at one end of the push rod. The other end of the push rod is fixedly connected to the corresponding first gear; Each of the first gears is meshed with a second gear fixedly disposed on the outer side of the main shaft; The main shaft is connected to the kinetic energy transmission end of the friction electric-electromagnetic composite generator.

2. The wind energy collection device according to claim 1, characterized in that: The wind turbine assembly also includes a top cover and a rotating support seat, wherein the top cover is fixedly arranged on the top end of the main shaft, the rotating support seat is fixedly sleeved on the main shaft and the second gear is located on the lower end surface of the rotating support seat.

3. The wind energy collection device according to claim 2, characterized in that: The upper end surface of the rotating support seat and the lower end surface of the top cover are both provided with a cylindrical groove, and the inner side of the fan blade is provided with a cylindrical raised key matching the groove, and the fan blade is rotated around the main axis through the cooperation of the cylindrical raised key and the cylindrical groove.

4. The wind energy collection device according to claim 1, characterized in that: The fan blades are made of carbon fiber composite materials and have an aerodynamically optimized cross-section.

5. The wind energy collection device according to claim 4, characterized in that: The number of the fan blades is at least 3, and the fan blades are evenly arranged around the outside of the main shaft.

6. The wind energy collection device according to claim 1, characterized in that: The variable pitch angle range of the wind turbine blades is 0° to 45°, and the gear ratio between the first gear and the second gear is 1:3 to 1:

4.

7. The wind energy collection device according to claim 1, characterized in that: The triboelectric-electromagnetic composite generator comprises a magnet mounting cover, a FEP film, a coil mounting cover, a bottom cover and an acrylic substrate; The magnet mounting cover is fixedly connected to the rotating support seat, and the FEP film is fixed to the bottom surface of the magnet mounting cover by a clamp; the coil mounting cover is fixedly connected to the main shaft and is provided with a coil mounting concave platform; The rotating support seat, the FEP film and the coil mounting cover all rotate with the main shaft; The acrylic substrate is fixed to the bottom cover and is located directly below the FEP film, and a plurality of sector-shaped copper foils are arranged at equal angles on the upper surface of the acrylic substrate.

8. The wind energy collection device according to claim 7, characterized in that: The top of the magnet mounting cover is provided with NdFeB permanent magnets distributed in a circular array, and the magnetic poles of adjacent permanent magnets are arranged alternately; An excitation coil corresponding to the permanent magnet is installed in the coil installation recess.

9. The wind energy collection device according to claim 7, characterized in that: The fan-shaped copper foils are separated by insulating grooves, and adjacent copper foils are connected in series via back conductors.

10. The wind energy collection device according to claim 7, characterized in that: The friction electric-electromagnetic composite generator also includes a mounting cover, which is buckled with the bottom cover through a boss on the bottom cover to form a closed power generation space.

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