An electromagnetic-friction hybrid wind turbine

Abstract

The present invention provides an electromagnetic-friction hybrid wind turbine generator, comprising a receiving device for outputting torque under the action of wind force and a power generation device for generating electric energy under the action of the torque, wherein the power generation device comprises a housing, a rotating shaft at least partially installed in the housing, and a first rotor, a conductive friction plate, a first stator, a second rotor, a second stator and a friction coupler installed in the housing; the conductive friction plate, the first stator and the second stator are all fixedly installed in the housing, the first rotor and the friction coupler are fixedly installed on the rotating shaft, the second rotor is rotatably installed in the housing, and can be connected with the friction coupler to transmit torque. The present invention can automatically switch the power generation mode according to the size of the wind speed, thereby improving the power generation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to an electromagnetic-friction hybrid wind power generator. Background Art

[0002] The development of smart agriculture can improve agricultural production efficiency, optimize resource allocation, reduce costs, improve the quality of agricultural products, enhance risk resistance, promote rural economic development, promote agricultural scientific and technological innovation and environmental protection, and is the foundation for realizing agricultural modernization.

[0003] Agricultural IoT nodes play an important role in smart agriculture, providing data support for the development of smart agriculture. Through a large number of sensor nodes to form a monitoring network, various data in the agricultural environment, such as temperature, humidity, light, carbon dioxide concentration, etc., can be monitored and collected in real time, providing a scientific and reasonable decision-making basis for agricultural production. Agricultural IoT nodes are usually deployed in remote areas far away from power facilities, so how to provide reliable power supply for these nodes is a challenging problem.

[0004] Since it is difficult to use wired power supply in crop growing environments (especially in open fields), using solar energy to provide energy for agricultural IoT nodes is a flexible and effective way. However, solar panels can only work during sunny days and cannot provide power all day and all weather, and they need to be stored in large-capacity batteries buried deep underground. Moreover, the harsh outdoor use environment of agricultural IoT nodes will affect the life of the batteries, and in severe cases, it will cause battery leakage and cause environmental pollution.

[0005] Therefore, how to improve the all-day and all-weather power supply capacity of agricultural Internet of Things nodes and reduce the battery capacity and volume is of great significance for reducing the cost of using Internet of Things nodes and reducing the hidden dangers of agricultural environmental damage.

[0006] To overcome these problems, it is particularly important to explore new ways of energy utilization. Wind energy is a kind of energy that is distributed throughout nature and can work both day and night. Compared with photovoltaic power generation, it has the advantages of all-day and all-weather operation. However, traditional electromagnetic wind turbines require a higher working wind speed (10-25 m / s). Affected by the friction resistance of the ground, the closer to the surface, the lower the wind speed (3 m / s), so electromagnetic wind turbines are usually installed on high towers far away from the ground. In order to meet the detection needs of sensors, agricultural Internet of Things nodes need to be placed close to the ground. The breeze environment on the surface is difficult to meet the wind speed requirements of electromagnetic wind turbines, which limits the application of wind energy in the energy supply of agricultural Internet of Things nodes.

[0007] An important factor that determines the efficiency of wind power generation is the size of the wind speed. For this reason, people have invented a friction nanogenerator (TENG) based on organic materials. When the surface wind speed is low, the triboelectric generator has the effect of low starting wind speed, which is suitable for collecting breeze energy in agricultural environments. However, the efficiency of triboelectric generators is not as good as traditional electromagnetic wind turbines at high wind speeds. Therefore, combining triboelectric power generation with electromagnetic power generation technology can not only effectively utilize surface breeze resources, but also give full play to the high efficiency of electromagnetic power generation when wind speed conditions are good, thus forming an efficient, stable, and all-weather IoT node power supply system.

[0008] In the published paper “An Ultra-Durable Windmill-Like Hybrid Nanogeneratorfor Steady and Efficient Harvesting of Low-Speed ​​Wind Energy [J]. Nano-MicroLett, 2020, 12(1): 11,” a durable and efficient windmill-like hybrid nanogenerator is disclosed. The rotating contact separation method can effectively avoid the wear of the friction material. However, the friction power generation effect is poor during the power generation process, and the friction power generation efficiency decreases significantly at high wind speeds.

[0009] In the published paper "Functional structure enhanced synergistic sensing from triboelectric-electromagnetic hybrid nanogenerator for self-powered rotating speed monitoring [J]. Energy Rep, 2022, 8: 5272-83.", a self-powered motor speed sensor based on a coaxial integrated triboelectric-electromagnetic hybrid nanogenerator is disclosed for online speed monitoring and fault warning. However, the design of the film and friction layer in the triboelectric nanogenerator structure has large wear, which will affect the working life of the generator.

[0010] In the published document "Research on triboelectric-electromagnetic composite wind speed sensor based on origami structure [J]. Metrology and Testing Technology, 2023, 50(11): 58-60+65. DOI: 10.15988 / j.cnki.1004-6941.2023.11.017.", a triboelectric-electromagnetic composite wind speed sensor is disclosed, and the origami structure is used to achieve accurate wind speed measurement. However, it is just a simple combination of friction and electromagnetic structures, and there is little research on the good combination of friction nanogenerators and electromagnetic generators.

[0011] In the published document "Han Linchong. Design and Research of Self-Powered Wind Speed ​​Sensor in Transmission Lines [D]. Changchun University of Technology, 2024. DOI: 10.27805 / d.cnki.gccgy.2024.000621.", a self-powered wind speed monitoring device based on a friction-electromagnetic hybrid generator is disclosed, which is used to monitor the wind speed information causing breeze vibration of overhead transmission lines. However, there is no good switching device between the friction nanogenerator and the electromagnetic generator, the power generation efficiency is limited, and the efficiency of wind power collection is low.

[0012] In summary, the currently commonly used electromagnetic-friction hybrid generator is affected by the friction power generation part of the generator, and its service life is limited; and in low-speed wind environments, the power generation efficiency is still limited by the electromagnetic power generation part of the generator, and it is difficult to meet the power supply needs of IoT nodes in low wind speed environments; the critical wind speed conversion device is lacking or has low efficiency, and high wind speed energy collection is restricted. Summary of the invention

[0013] The technical problem to be solved by the present invention is to provide an electromagnetic-friction hybrid wind turbine generator which can automatically switch the power generation mode according to the wind speed, thereby improving the power generation efficiency.

[0014] The present invention is implemented as follows: an electromagnetic-friction hybrid wind power generator, comprising a wind energy receiving device for outputting torque under the action of wind force and a power generation device for generating electric energy under the action of the torque, the power generation device comprising a housing, a rotating shaft at least partially installed in the housing, and a first rotor installed in the housing, a conductive friction plate, a first stator, a second rotor, a second stator and a friction coupler;

[0015] The conductive friction plate, the first stator and the second stator are all fixedly mounted in the housing, the first rotor and the friction coupler are fixedly mounted on the rotating shaft, and the second rotor is rotatably mounted in the housing and can be connected with the friction coupler to transmit torque;

[0016] When the rotating shaft is at a speed below the first speed, the rotating shaft drives the first rotor to rotate so as to generate electric energy through friction with the conductive friction plate;

[0017] When the rotating shaft is at a first speed to a second speed, the rotating shaft drives the first rotor to rotate so as to generate electric energy with the first stator through electromagnetic induction;

[0018] When the rotating shaft is at a speed higher than the second speed, the rotating shaft drives the second rotor to rotate, thereby generating electric energy with the second stator through electromagnetic induction;

[0019] The second rotation speed is greater than the first rotation speed.

[0020] Furthermore, the first rotor includes a turntable, a FEP film and a first magnet; the FEP film is fixedly mounted on the turntable, and the first magnet is movably mounted on the turntable; the first magnet can change its distance from the rotation center according to the rotation speed of the turntable.

[0021] Furthermore, the first rotor also includes a return spring, and the return spring abuts against the first magnet.

[0022] Furthermore, the turntable is provided with a slot extending to the outer edge, and a pair of "C"-shaped clamps for clamping the FEP film are provided in the slot, and the outer ends of the pair of "C"-shaped clamps are provided with fixing pieces.

[0023] Furthermore, two conductive friction plates are provided and are respectively located above and below the first rotor. The middle portion of the FEP film is fixed on the turntable, and two sides thereof are respectively in contact with corresponding conductive friction plates.

[0024] Furthermore, the number of the first stators is two, and they are respectively located above and below the corresponding conductive friction plates, and the conductive friction plates are fixedly mounted on the first stators.

[0025] Further, the friction coupler comprises a heat-conducting sleeve, a temperature-sensitive sheet and a friction sheet; the inner wall of the second rotor is fixedly provided with a friction sleeve and a connecting protrusion; the temperature-sensitive sheet and the friction sheet are fixedly provided on the heat-conducting sleeve one above the other; the friction sheet is in contact with the friction sleeve;

[0026] The temperature sensing sheet is in a rolled-up state when its temperature is lower than the working temperature, and is away from the connecting protrusion, so that the friction coupler and the second rotor are in a separated state;

[0027] The temperature sensing sheet is in an expanded state when its temperature exceeds the working temperature, and abuts against the connecting protrusion, so that the friction coupler and the second rotor are in a combined state.

[0028] Furthermore, the friction plate is in an elastically deformed state.

[0029] Furthermore, the housing includes an upper shell and a base, the base is fixedly mounted at the bottom opening of the upper shell, and the base is provided with heat dissipation holes.

[0030] Furthermore, the wind energy receiving device includes a main body, a receiving part and a rotation speed sensor, the shaft of the receiving part is rotatably mounted on the main body, the rotation speed sensor is mounted on the shaft, and the shaft is connected to the rotating shaft.

[0031] The beneficial effects brought by the present invention are:

[0032] 1. The present invention can generate electricity by generating static electricity through friction under breeze conditions, effectively utilizing micro energy in the environment; in addition, it can also be transformed into a power generation mode mainly based on electromagnetic induction after the wind speed increases, thereby improving power generation efficiency.

[0033] 2. The present invention can automatically switch the power generation mode according to the wind speed, fully adapt to the field environment, and meet the power generation needs under different conditions.

[0034] 3. The present invention utilizes the characteristic of thermal deformation of the temperature sensing piece to switch the connection state between the second rotor and the rotating shaft, thereby achieving the purpose of reducing the weight on the shaft at low wind speed and performing electromagnetic power generation at high wind speed.

[0035] 4. The main working parts of the present invention are assembled in a stacked manner, which can greatly reduce the axial size, make the structure more compact, and contribute to the overall lightweight and miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A structural stereogram of a preferred embodiment of the present invention;

[0037] Figure 2 for Figure 1 A top view of the structure of the illustrated embodiment;

[0038] Figure 3 for Figure 2 Structural cross-section view along the AA axis;

[0039] Figure 4 for Figure 1 Axial exploded view of the power generation device in the illustrated embodiment (housing omitted);

[0040] Figure 5 for Figure 1 A structural stereogram of the rotating shaft and the friction coupler in the illustrated embodiment;

[0041] Figure 6 for Figure 1 A structural stereogram of the first stator in the illustrated embodiment;

[0042] Figure 7 for Figure 1 A structural stereogram of the second rotor in the illustrated embodiment;

[0043] Figure 8 for Figure 1 A structural stereogram of the conductive friction plate in the illustrated embodiment;

[0044] Fig. 9 for Figure 1 A structural stereogram of the first rotor in the illustrated embodiment;

[0045] Fig.10 for Fig. 9 A radial exploded view of the first rotor shown;

[0046] Fig.11 for Figure 1 A schematic diagram showing the working principle of the friction coupling and the second rotor in the illustrated embodiment. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0048] like Figure 1-11 As shown, the present invention discloses an electromagnetic-friction hybrid wind power generator, comprising a wind energy receiving device 100 and a power generation device 200. The wind energy receiving device 100 is used to output torque under the action of wind force, and the power generation device 200 is used to generate electric energy under the action of torque.

[0049] like Figure 3 and 4 As shown, the power generation device 200 includes a housing 201, a rotating shaft 204 at least partially installed in the housing 201, and a first rotor 211, a conductive friction plate 210, a first stator 209, a second rotor 206, a second stator 205 and a friction coupler 212 installed in the housing 201.

[0050] Specifically, the housing 201 includes an upper shell 202 and a base 203. The bottom of the upper shell 202 is provided with an opening, the inner side of the opening is provided with a tongue-and-groove structure with a base mounting threaded hole, and the outer side thereof is provided with a protruding structure for connection.

[0051] The top surface of the upper shell 202 is provided with a center hole and a wire hole, an upper bearing is provided at the center hole, and a wire harness tube 234 is sealed and installed at the wire hole, and the wire harness tube 234 is used for the extension connection of the internal wire harness. A plurality of first bosses 229 and second bosses 230 are provided inside the upper shell 202, the first boss 229 is provided with a slewing bearing mounting threaded hole, the second boss 230 is provided with a first stator mounting threaded hole, and the mounting surface of the first boss 229 is higher than the mounting surface of the second boss 230.

[0052] The base 203 is provided with a plurality of first stator mounting through holes, a bearing seat is provided in the center thereof, a lower bearing is installed in the bearing seat, and a matching tongue-and-groove structure and a protruding structure with an upper shell mounting through hole are also provided at the edge thereof. The tongue-and-groove structure and the protruding structure of the base 203 and the upper shell 202 are matched and connected to each other, wherein the tongue-and-groove structure is sealed by a sealing ring, and the protruding structure is fixedly connected by screws. The base 203 is provided with heat dissipation holes for internal heat dissipation.

[0053] The rotating shaft 204 is connected to the upper bearing and the lower bearing respectively, and the first rotor 211 is installed on the rotating shaft 204 through a spline, so that it can rotate together with the rotating shaft 204.

[0054] Specifically, Fig. 9 and 10 As shown, the first rotor 211 includes a turntable 218, an FEP film 219 and a first magnet 235. Six FEP films 219 are provided and fixedly mounted on the turntable 218 in a circumferentially uniform manner. Six first magnets 235 are also provided and are also movably mounted on the turntable 218 in a circumferentially uniform manner. Since the first magnets 235 are movably mounted, the distance between the first magnets 235 and the rotation center will also change when the rotation speed of the rotating shaft 204 changes.

[0055] Specifically, the FEP film 219 is fixed by clamping. The turntable 218 is provided with six slots 223 extending to the outer edge, and a pair of "C"-shaped clips 224 for clamping the FEP film 219 are provided in the slots 223. The FEP film 219 is a fan-shaped structure, which is bent in the middle and passes through the gap between the two "C"-shaped clips 224 to be clamped by them. The outer ends of the pair of "C"-shaped clips 224 on both sides are sleeved with fixing parts 222, and the fixing parts 222 are provided with sockets 225 matching the structure of the "C"-shaped clips 224, so as to be sleeved on the ends of the "C"-shaped clips 224 to fix them. This fixing method is simple, fast, and easy to replace.

[0056] Specifically, the first magnet 235 is arranged in a rolling manner. Two rollers, one above and one below, are arranged on both sides of the first magnet 235. Six slide grooves are arranged on the turntable 218. The first magnet 235 moves in the corresponding slide grooves, and the rollers form rolling contact with the disk surfaces on both sides of the slide grooves. After such arrangement, the first magnet 235 can roll more smoothly in the slide grooves.

[0057] Furthermore, the first rotor 211 further includes six return springs 220, which abut against the first magnet 235. The return spring 220 is used to enable the first magnet 235 to return to its initial position after the speed decreases, that is, the return spring 220 enables the first magnet 235 to have a tendency to move toward the rotation center.

[0058] Specifically, Figure 6As shown, the first stator 209 includes a stator disk 231 and six coils 232. The stator disk 231 is provided with a plurality of conductive friction plate mounting threaded holes, a second boss mounting through hole, a base mounting threaded hole and a coil slot 236. The coils 232 are fixed one by one in the coil slot 236. When the first magnet 235 is at the initial position, the distance between it and the coil 232 is the largest. At this time, even if the first rotor 211 rotates, the amount of electricity generated by electromagnetic induction is much smaller than the amount of electricity generated by friction at this speed.

[0059] Obviously, if there is one first stator 209, the stator disc 231 is fixedly mounted on the second boss 230 or the base 203 by screws. Obviously, the first stator 209 is located above or below the first rotor 211. If there are two first stators 209, the stator disc 231 is fixedly mounted on the second boss 230 and the base 203 by screws. Obviously, the first stator 209 is located above and below the first rotor 211, respectively.

[0060] The conductive friction plate 210 is a copper structure, which is fixed on the stator disk 231 by screws. Obviously, the number of conductive friction plates 210 depends on the setting mode of the FEP film 219. In this example, the two sides of the FEP film 219 are respectively located above and below the turntable 218 after being bent, so the number of conductive friction plates 210 is also two, and they are also respectively located above and below the turntable 218, so as to contact with the FEP film 219 on the same side to generate friction. The FEP film 219 itself has a certain elasticity, so it can contact with the conductive friction plate 210 under the action of elasticity after being bent. On the other hand, since the conductive friction plate 210 itself is relatively thin, it can also contact with the conductive friction plate 210 under the action of electrostatic adsorption after static electricity is generated by friction. As the rotation speed increases, the electrostatic adsorption force gradually increases within a certain range, further improving the power generation effect without hindering the rotation of the first rotor.

[0061] Furthermore, Figure 8As shown, the conductive friction plate 210 is a circular structure, which is divided into two mutually nested inner and outer parts, wherein the outer part 217 includes an outer ring body 240 and six integrally arranged inner fan-shaped internal tooth structures 239 and uniformly distributed around the circumference of the outer ring body 240, and the inner part 216 includes an inner ring body 238 and six integrally arranged outer fan-shaped external tooth structures 237 and uniformly distributed around the circumference of the inner ring body 238. The six inner fan-shaped tooth structures 239 and the six outer fan-shaped tooth structures 237 are staggered and distributed with each other, so that the inner part 216 and the outer part 217 form a gap with equal width everywhere, so that the circular area can be fully utilized. Both the outer part 217 and the inner part 216 are provided with stator disc mounting holes corresponding to the conductive friction plate mounting threaded holes. The conductive friction plate 210 is divided into two mutually nested inner and outer parts, one of which is a positive electrode and the other is a negative electrode.

[0062] Specifically, the second stator 205 is fixedly mounted on the top wall of the housing 201 by screws. The second stator 205 includes an iron core and a coil winding. The second rotor 206 is rotatably mounted in the upper housing 202 so as to generate electromagnetic induction with the second stator 205. Specifically, the second rotor 206 includes a rotor seat 226 and a second magnet 228, the rotor seat 226 is mounted in the upper housing 202 by a slewing bearing 208, the outer ring of the slewing bearing 208 is fixedly mounted on the first boss 229 by screws, and the rotor seat 226 is fixedly mounted on the inner ring of the slewing bearing 208 by screws. A plurality of second magnets 228 are provided, and are evenly distributed on the rotor seat 226 circumferentially.

[0063] It should be noted that the magnetic induction intensity and quantity of the second magnet 228 are greater than the magnetic induction intensity of the first magnet 235, so the weight of the second rotor 206 is greater than that of the first rotor 211, and the required torque is also greater. When the wind speed is low, the torque generated by the rotating shaft 204 is small, so in order to reduce the mass on the shaft, the second rotor 206 does not rotate with the shaft. When the wind speed is high, the torque generated by the rotating shaft 204 is large, and at this time, the second rotor 206 rotates with the shaft to generate electricity. Therefore, the second rotor 206 needs to rotate at an appropriate time.

[0064] Specifically, Figure 5As shown, the second rotor 206 is coupled to the rotating shaft 204 through a friction coupler 212. The friction coupler 212 is fixedly mounted on the rotating shaft 204, and includes a heat-conducting sleeve 213, a temperature-sensitive sheet 215 and a friction sheet 214. The inner wall of the rotor seat 226 is fixedly provided with four circumferentially evenly distributed connecting protrusions 227 and a friction sleeve 207 located above the connecting protrusions 227. There are four temperature-sensitive sheets 215 and friction sheets 214 evenly distributed around the circumference, and they are fixedly arranged one above and one below on the heat-conducting sleeve 213. The friction sheet 214 is in contact with the friction sleeve 207. During the process of the friction sheet 214 rotating with the rotating shaft 204, it will continue to rub the friction sleeve 207 to generate heat, and the heat is transferred to the temperature-sensitive sheet 215 through the heat-conducting sleeve 213 to heat it up. The temperature-sensitive sheet 215 is made of a thermal bimetallic sheet, and its principle is common knowledge, so it will not be repeated.

[0065] In this example, the temperature sensing sheet 215 of different materials has different working temperatures. The temperature sensing sheet 215 is in a reeled state when its temperature is lower than the working temperature. At this time, the rotation diameter D1 is smaller than the rotation diameter D2 of the connecting protrusion 227, so that it can be away from the connecting protrusion 227, so that the friction coupler 212 and the second rotor 206 are in a separated state, and the second rotor 206 does not rotate with the rotating shaft 204. Furthermore, since the friction plate 214 and the friction sleeve 207 need to be continuously rubbed, wear will occur. In order to maintain the contact relationship between the two, the friction plate 214 is in an elastic deformation state. Whether the friction sleeve 207 is worn or the friction plate 214 is worn, the friction plate 214 will compensate by restoring a certain deformation.

[0066] like Fig.11 As shown, the temperature sensing plate 215 is in an expanded state when its temperature exceeds the working temperature. At this time, the rotation diameter D1 is larger than the rotation diameter D2 of the connecting protrusion 227, so that it can abut the connecting protrusion 227, so that the friction coupler 212 and the second rotor 206 are in a combined state, and the second rotor 206 can rotate with the rotating shaft 204.

[0067] Specifically, the wind energy receiving device 100 includes a main body 103, a receiving part 101 and a rotation speed sensor, wherein the shaft 102 of the receiving part 101 is rotatably mounted on the main body 103, the rotation speed sensor is mounted on the shaft 102, and the shaft 102 is connected to the rotating shaft 204 through a coupling 104. The rotation speed sensor is used to detect the rotation speed of the rotating shaft 204, so as to better monitor the specific parameter data of the rotation speed, power generation mode and power generation situation, so as to facilitate the determination of the correlation between them.

[0068] Furthermore, the receiving part 101 is a wind cup, which has a better breeze starting effect and is not affected by wind direction.

[0069] It should be noted that the coil 232, the coil winding and the conductive friction plate 210 in the present invention are respectively connected with wires to transmit electrical energy to other devices, which belongs to the prior art and will not be described in detail.

[0070] Under light wind conditions, the wind energy receiving device 100 generates torque under the action of wind force, and drives the rotating shaft 204 of the power generation device 200 to rotate. Since the wind speed is relatively low (less than the first speed) at this time, the first magnet 235 is always close to the rotation center under the action of the reset spring 220. Therefore, when the first rotor 211 rotates, the FEP film 219 continuously rubs the conductive friction plate 210, thereby generating electricity using the static electricity generated by friction. This stage is mainly based on friction power generation, but since the power generation of friction power generation is also relatively small, it is only suitable for powering low-power devices such as environmental sensors in the scene.

[0071] As the wind speed increases, when the speed exceeds the first speed but is less than the second speed, the centrifugal force on the first magnet 235 exceeds the elastic force provided by the reset spring 220, so that the first magnet 235 moves away from the center of rotation. At this time, the distance between the first magnet 235 and the coil 232 gradually decreases, and the amount of electricity generated by electromagnetic induction gradually increases and exceeds the amount of electricity generated by friction, and more equipment can be powered at this time. Obviously, since the speed is not high enough, the heat generated by the friction between the friction plate 214 and the friction sleeve 207 is dissipated outward under the condition of natural heat dissipation, so the temperature of the temperature-sensitive plate 215 will not reach its working temperature, and the friction coupler 212 and the second rotor 206 are in a disconnected state.

[0072] When the wind speed continues to increase, so that the rotation speed of the rotating shaft 204 reaches or exceeds the second rotation speed, the heat generated by the friction plate 214 and the friction sleeve 207 cannot be dissipated outward through natural heat dissipation, so that the temperature sensing plate 215 continues to rise to above the working temperature, and then the friction coupler 212 is connected to the second rotor 206, so that the second rotor 206 rotates with the rotating shaft 204. Due to the high wind speed, the torque generated is also sufficient to drive the second rotor 206 to rotate. Because the magnetic strength and quantity of the second magnet 228 are better than the first magnet 235, it can generate more electricity.

[0073] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electromagnetic-friction hybrid wind turbine, comprising a wind energy receiving device (100) for outputting torque under the action of wind force and a power generation device (200) for generating electric energy under the action of the torque, characterized in that: The power generation device (200) comprises a housing (201), a rotating shaft (204) at least partially mounted in the housing (201), and a first rotor (211), a conductive friction plate (210), a first stator (209), a second rotor (206), a second stator (205), and a friction coupler (212) mounted in the housing (201); The conductive friction plate (210), the first stator (209) and the second stator (205) are all fixedly mounted in the housing (201); the first rotor (211) and the friction coupler (212) are fixedly mounted on the rotating shaft (204); the second rotor (206) is rotatably mounted in the housing (201) and is capable of forming a connection with the friction coupler (212) to transmit torque; When the rotating shaft (204) is below a first rotation speed, the rotating shaft (204) drives the first rotor (211) to rotate, thereby generating electric energy through friction with the conductive friction plate (210); When the rotating shaft (204) is at a speed ranging from the first speed to the second speed, the rotating shaft (204) drives the first rotor (211) to rotate, thereby generating electric energy with the first stator (209) through electromagnetic induction; When the rotating shaft (204) is at a speed above the second speed, the rotating shaft (204) drives the second rotor (206) to rotate, thereby generating electric energy through electromagnetic induction with the second stator (205); The second rotation speed is greater than the first rotation speed.

2. The electromagnetic-friction hybrid wind turbine according to claim 1, characterized in that: The first rotor (211) comprises a turntable (218), an FEP film (219), and a first magnet (235); the FEP film (219) is fixedly mounted on the turntable (218), and the first magnet (235) is movably mounted on the turntable (218); the first magnet (235) can change its distance from the rotation center according to the rotation speed of the turntable (218).

3. The electromagnetic-friction hybrid wind turbine according to claim 2, characterized in that: The first rotor (211) further comprises a return spring (220), wherein the return spring (220) abuts against the first magnet (235).

4. The electromagnetic-friction hybrid wind turbine according to claim 2, characterized in that: The rotating disk (218) is provided with a slot (223) extending to the outer edge, and a pair of "C"-shaped clamps (224) for clamping the FEP film (219) are provided in the slot (223), and the outer ends of the pair of "C"-shaped clamps (224) are sleeved with fixing members (222).

5. The electromagnetic-friction hybrid wind turbine according to claim 2, characterized in that: Two conductive friction plates (210) are provided and are located above and below the first rotor (211), respectively. The middle of the FEP film (219) is fixed on the rotating disk (218), and both sides thereof are in contact with corresponding conductive friction plates (210).

6. The electromagnetic-friction hybrid wind turbine according to claim 5, characterized in that: The number of the first stators (209) is two, and they are respectively located above and below the corresponding conductive friction plates (210), and the conductive friction plates (210) are correspondingly fixedly mounted on the first stators (209).

7. The electromagnetic-friction hybrid wind turbine according to claim 1, characterized in that: The friction coupler (212) comprises a heat-conducting sleeve (213), a temperature-sensing sheet (215) and a friction sheet (214); a friction sleeve (207) and a connecting protrusion (227) are fixedly arranged on the inner wall of the second rotor (206); the temperature-sensing sheet (215) and the friction sheet (214) are fixedly arranged on the heat-conducting sleeve (213) one above the other; and the friction sheet (214) is in contact with the friction sleeve (207); The temperature sensing sheet (215) is in a rolled-up state when its temperature is lower than the operating temperature, and is away from the connecting protrusion (227), so that the friction coupler (212) and the second rotor (206) are in a separated state; The temperature sensing sheet (215) is in an expanded state when its temperature exceeds the operating temperature, and abuts against the connecting protrusion (227), thereby placing the friction coupler (212) and the second rotor (206) in a combined state.

8. The electromagnetic-friction hybrid wind turbine according to claim 7, characterized in that: The friction plate (214) is in an elastically deformed state.

9. The electromagnetic-friction hybrid wind turbine according to claim 1, characterized in that: The housing (201) comprises an upper shell (202) and a base (203); the base (203) is fixedly mounted at the bottom opening of the upper shell (202); and the base (203) is provided with heat dissipation holes.

10. The electromagnetic-friction hybrid wind turbine according to claim 1, characterized in that: The wind energy receiving device (100) comprises a main body (103), a receiving part (101) and a rotation speed sensor, wherein a shaft part (102) of the receiving part (101) is rotatably mounted on the main body (103), the rotation speed sensor is mounted on the shaft part (102), and the shaft part (102) is connected to the rotating shaft (204).

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