Wind power plant

Abstract

The utility model relates to wind power generation technical field discloses wind power generation device, including support subassembly, wind wheel subassembly and power generation subassembly, wind wheel subassembly includes main shaft and impeller, and the main shaft fixed mounting is in support subassembly, and the impeller rotatablely installs on the main shaft, power generation subassembly includes first power generation unit and second power generation unit, and the stator of first power generation unit and second power generation unit all fixed mounting is in main shaft, and the outer rotor of first power generation unit and second power generation unit all are connected with the impeller fixedly, the utility model under the same wind force condition, first power generation unit and second power generation unit can work simultaneously, and the mechanical energy of impeller capture is more efficient, more fully converts into electric energy, effectively increases the overall power generation, improves the wind energy utilization efficiency and power generation efficiency, solves when the outside wind speed is at the low level, and the overall power generation of generator is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and specifically to wind power generation devices. Background Technology

[0002] In traditional wind power generation systems, the generator rotor and impeller employ a synchronous drive design, ensuring that the rotor speed and impeller speed remain synchronized. When the outside wind speed is low, the impeller can capture less wind energy, resulting in insufficient energy to maintain a high operating speed, thus causing the impeller speed to decrease. Due to the synchronized speeds of the generator rotor and impeller, the decrease in impeller speed is directly transmitted to the generator rotor, causing it to also decrease. Since the generator's power output is closely related to the rotor speed, a decrease in rotor speed weakens the electromagnetic induction process within the generator, reducing the output power and ultimately leading to insufficient overall generator output. Utility Model Content

[0003] In view of this, the present invention provides a wind power generation device to solve the problem of insufficient overall power generation of the generator when the outside wind speed is low.

[0004] In a first aspect, this utility model provides a wind power generation device, including a support assembly, a wind turbine assembly, and a power generation assembly; the wind turbine assembly includes a main shaft and an impeller, the main shaft is fixedly mounted on the support assembly, and the impeller is rotatably mounted on the main shaft; the power generation assembly includes a first power generation unit and a second power generation unit, the stators of the first power generation unit and the second power generation unit are both fixedly mounted on the main shaft, and the outer rotors of the first power generation unit and the second power generation unit are both fixedly connected to the impeller.

[0005] Beneficial Effects: By setting up a first power generation unit and a second power generation unit, with both stators fixed on the main shaft and their outer rotors fixedly connected to the impeller, the rotation of the impeller simultaneously drives the outer rotors of both units to rotate relative to the stators. Compared to setting up only a single generator, under the same wind conditions, the first and second power generation units can work simultaneously, converting the mechanical energy captured by the impeller into electrical energy more efficiently and fully, effectively increasing the overall power generation, improving wind energy utilization efficiency and power generation efficiency, and solving the problem of insufficient overall generator power generation when the outside wind speed is low. Furthermore, under conditions of high wind speed and high impeller input power, the dual-generator setup can more effectively carry and convert input energy, avoiding the power saturation or conversion efficiency reduction problems that may occur with a single generator, thereby maximizing the utilization rate and power generation benefits of wind energy resources. Moreover, the first and second power generation units operate independently, working collaboratively to increase the total output power while maintaining partial power generation capacity in the event of a single unit failure, significantly improving system fault tolerance and operational continuity.

[0006] In one optional embodiment, the impeller includes a first support plate, a second support plate, and blades; the first support plate is rotatably connected to the main shaft; the second support plate is rotatably connected to the main shaft and is spaced apart from the first support plate along the extension direction of the main shaft; both ends of the blades are connected to the first support plate and the second support plate, respectively; wherein, the outer rotor of the first power generation unit is connected to the first support plate, and the outer rotor of the second power generation unit is connected to the second support plate.

[0007] Beneficial effects: The impeller is spaced apart along the main shaft direction by the first and second support plates and connected by blades, so that the load on the blades is distributed to the two independent support plates, which significantly reduces the risk of single-point stress concentration and improves the fatigue resistance and structural reliability of the impeller; the outer rotor of the first power generation unit is connected to the first support plate and the outer rotor of the second power generation unit is connected to the second support plate, so that when the impeller rotates, the mechanical kinetic energy can be synchronously transferred to the outer rotor of the first and second power generation units through the first and second support plates, realizing parallel power generation of the two power generation units.

[0008] In one optional embodiment, the first power generation unit is located on one side of the first support plate along the main shaft axis, and the stator of the first power generation unit is fixed on the main shaft, and the outer rotor of the first power generation unit is fixedly connected to the first support plate.

[0009] Beneficial effects: Positioning the first power generation unit on one side of the first support plate along the main shaft avoids interference with the impeller sweep area. The stator of the first power generation unit is securely fixed to the main shaft, and the outer rotor of the first power generation unit is connected to the first support plate. This allows the first support plate to directly drive the outer rotor of the first power generation unit to rotate efficiently when the impeller rotates, reducing intermediate energy transfer links and losses, and enabling the impeller's mechanical energy to be converted into electrical energy more quickly and fully. Simultaneously, the stator of the first power generation unit being fixed to the main shaft ensures the stability of the power generation process. Precise positioning and coordinated operation of all components effectively improve power generation efficiency and system reliability, ensuring that the first power generation unit can stably output electrical energy.

[0010] In one alternative embodiment, the outer rotor of the first power generation unit is detachably connected to the first support plate via a first fastener.

[0011] Beneficial effects: The outer rotor of the first power generation unit is detachably connected to the first support plate via the first fastener, which improves the convenience of maintenance and repair of the first power generation unit. When the first power generation unit malfunctions or needs to be upgraded, the first power generation unit and the first support plate can be disassembled without complicated operations, effectively shortening downtime and reducing maintenance costs.

[0012] In one optional embodiment, the second power generation unit is located on one side of the second support plate along the main shaft axis, and the stator of the second power generation unit is fixed on the main shaft, and the outer rotor of the second power generation unit is fixedly connected to the second support plate.

[0013] Beneficial effects: Positioning the second power generation unit on one side of the second support plate along the main shaft avoids interference with the impeller sweep area. The stator of the second power generation unit is securely fixed to the main shaft, and the outer rotor of the second power generation unit is connected to the second support plate. This allows the second support plate to directly drive the outer rotor of the second power generation unit to rotate efficiently when the impeller rotates, reducing intermediate energy transfer links and losses, and enabling the impeller's mechanical energy to be converted into electrical energy more quickly and fully. Simultaneously, the stator of the second power generation unit being fixed to the main shaft ensures the stability of the power generation process. Precise positioning and coordinated operation of all components effectively improve power generation efficiency and system reliability, ensuring that the second power generation unit can stably output electrical energy.

[0014] In one alternative embodiment, the outer rotor of the second power generation unit is detachably connected to the second support plate via a second fastener.

[0015] Beneficial effects: The outer rotor of the second generator unit is detachably connected to the second support plate via the second fastener, which improves the convenience of maintenance and repair of the second generator unit. When the second generator unit malfunctions or needs to be upgraded, the second generator unit and the second support plate can be disassembled without complicated operations, effectively shortening downtime and reducing maintenance costs.

[0016] In one alternative implementation, the first power generation unit is a disc generator.

[0017] Beneficial effects: Using a disc generator as the primary power generation unit offers several advantages. Its flat, disc-shaped structure, small axial dimensions, and compact design allow for efficient installation within limited space. Furthermore, its more uniform air gap magnetic field distribution effectively reduces torque fluctuations, improving power generation stability and power quality. Moreover, the disc generator's rotor has low rotational inertia and rapid dynamic response, enabling it to quickly adapt to wind speed changes and promptly convert wind energy into electrical energy. This improves wind energy capture efficiency, increases power generation, and enhances the adaptability and reliability of the entire wind power generation system under different wind conditions.

[0018] In one alternative implementation, the second power generation unit is a disc generator.

[0019] Beneficial effects: Using a disc generator as the second power generation unit offers several advantages. Its flat, disc-shaped structure, small axial dimensions, and compact design allow for efficient installation within limited space. Furthermore, its more uniform air gap magnetic field distribution effectively reduces torque fluctuations, improving power generation stability and power quality. Moreover, the disc generator's rotor has low rotational inertia and rapid dynamic response, enabling it to quickly adapt to wind speed changes and promptly convert wind energy into electrical energy. This improves wind energy capture efficiency, increases power generation, and enhances the adaptability and reliability of the entire wind power generation system under different wind conditions.

[0020] In one optional embodiment, the main shaft, the impeller, the first power generation unit, and the second power generation unit are coaxially arranged.

[0021] Beneficial effects: The coaxial arrangement of the main shaft, impeller, first power generation unit, and second power generation unit ensures that the mechanical energy generated by the impeller rotation can be efficiently and without deviation transmitted to the first and second power generation units along a straight line. This reduces energy loss caused by eccentricity or angular deviation, greatly improving the conversion efficiency of wind energy to electricity. Furthermore, the coaxial design ensures uniform stress on all components, reducing vibration and wear caused by uneven stress, extending the overall service life of the wind power generation unit, and reducing maintenance costs and downtime. Moreover, the coaxial arrangement of the main shaft, impeller, first power generation unit, and second power generation unit results in a simple and orderly layout, facilitating installation, commissioning, and daily maintenance, thus improving the operational reliability and economy of the entire wind power generation unit.

[0022] In one alternative embodiment, the wind power generation device is a vertical axis wind power generation device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a wind power generation device according to an embodiment of the present utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 11. Support rod;

[0027] 21. Main shaft; 22. Impeller; 221. First support plate; 222. Second support plate; 223. Blade;

[0028] 31. First power generation unit; 32. Second power generation unit. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] The following is combined with Figure 1 The following describes embodiments of the present invention.

[0031] According to an embodiment of the present invention, a wind power generation device is provided, including a support assembly, a wind turbine assembly, and a power generation assembly; the wind turbine assembly includes a main shaft 21 and an impeller 22, the main shaft 21 is fixedly mounted on the support assembly, and the impeller 22 is rotatably mounted on the main shaft 21; the power generation assembly includes a first power generation unit 31 and a second power generation unit 32, the stators of the first power generation unit 31 and the second power generation unit 32 are both fixedly mounted on the main shaft 21, and the outer rotors of the first power generation unit 31 and the second power generation unit 32 are both fixedly connected to the impeller 22.

[0032] In the above embodiment, by setting up a first power generation unit 31 and a second power generation unit 32, with the stators of both units fixed on the main shaft 21 and the outer rotors fixedly connected to the impeller 22, the rotation of the impeller 22 simultaneously drives the outer rotors of both units to rotate relative to the stators. Compared to setting up only a single generator, under the same wind conditions, the first power generation unit 31 and the second power generation unit 32 can work simultaneously, converting the mechanical energy captured by the impeller 22 into electrical energy more efficiently and fully. This effectively increases the overall power generation, improves wind energy utilization efficiency and power generation efficiency, and solves the problem of insufficient overall generator power generation when the external wind speed is low. Furthermore, under conditions of high wind speed and large input power of impeller 22, the dual generator configuration can more effectively carry and convert input energy, avoiding the power saturation or conversion efficiency reduction problems that may occur with a single generator, thereby maximizing the utilization rate of wind energy resources and power generation benefits; and the first power generation unit 31 and the second power generation unit 32 are independent of each other, which can work together to increase the total output power, and can maintain part of the power generation capacity when a single unit fails, greatly improving the system fault tolerance and operational continuity.

[0033] In specific implementations, depending on the actual situation, the first power generation unit 31 and the second power generation unit 32 can be selected as generators; or the first power generation unit 31 and the second power generation unit 32 can also be selected as generators with different power and rated speed.

[0034] In one embodiment, the impeller 22 includes a first support plate 221, a second support plate 222, and blades 223; the first support plate 221 is rotatably connected to the main shaft 21; the second support plate 222 is rotatably connected to the main shaft 21 and is spaced apart from the first support plate 221 along the extending direction of the main shaft 21; both ends of the blades 223 are connected to the first support plate 221 and the second support plate 222, respectively; wherein, the outer rotor of the first power generation unit 31 is connected to the first support plate 221, and the outer rotor of the second power generation unit 32 is connected to the second support plate 222.

[0035] In the above embodiment, the impeller 22 is spaced apart along the extension direction of the main shaft 21 by the first support plate 221 and the second support plate 222, and connected by the blades 223, so that the load on the blades 223 is distributed to the two independent support plates, which significantly reduces the risk of single-point stress concentration and improves the fatigue resistance and structural reliability of the impeller 22; the outer rotor of the first power generation unit 31 is connected to the first support plate 221, and the outer rotor of the second power generation unit 32 is connected to the second support plate 222, so that when the impeller 22 rotates, the mechanical kinetic energy can be synchronously transferred to the outer rotors of the first power generation unit 31 and the second power generation unit 32 through the first support plate 221 and the second support plate 222, so as to realize the parallel power generation of the two power generation units.

[0036] In a specific embodiment, multiple blades 223 are provided, and the multiple blades 223 are arranged sequentially and spaced around the outer periphery of the main shaft 21. Both ends of each blade 223 are connected to the first support plate 221 and the second support plate 222 respectively. Along the radial direction of the main shaft 21, the first power generation unit 31 and the second power generation unit 32 are arranged spaced apart from the blades 223.

[0037] In a specific implementation, the blade 223 is arranged parallel to the main shaft 21; the main shaft 21 is perpendicular to the plane where the first support plate 221 is located; the main shaft 21 is perpendicular to the plane where the second support plate 222 is located.

[0038] In one embodiment, the first power generation unit 31 is located on one side of the first support plate 221 along the axial direction of the main shaft 21, and the stator of the first power generation unit 31 is fixed on the main shaft 21, and the outer rotor of the first power generation unit 31 is fixedly connected to the first support plate 221.

[0039] In the above embodiment, the first power generation unit 31 is positioned on one side of the first support plate 221 along the axial direction of the main shaft 21 to avoid interference with the swept area of ​​the impeller 22. The stator of the first power generation unit 31 is securely fixed to the main shaft 21, and the outer rotor of the first power generation unit 31 is connected to the first support plate 221. This allows the first support plate 221 to directly drive the outer rotor of the first power generation unit 31 to rotate efficiently when the impeller 22 rotates, reducing intermediate links and losses in energy transfer and enabling the mechanical energy of the impeller 22 to be converted into electrical energy more quickly and fully. Simultaneously, the stator of the first power generation unit 31 being fixed to the main shaft 21 ensures the stability of the power generation process. Precise positioning and coordinated operation of each component effectively improve power generation efficiency and system reliability, ensuring that the first power generation unit 31 can stably output electrical energy.

[0040] In a specific implementation, the first power generation unit 31 is located below the first support plate 221.

[0041] In one embodiment, the outer rotor of the first power generation unit 31 is detachably connected to the first support plate 221 via a first fastener.

[0042] In the above embodiments, the outer rotor of the first power generation unit 31 is detachably connected to the first support plate 221 via a first fastener, which improves the convenience of maintenance and repair of the first power generation unit 31. When the first power generation unit 31 malfunctions or needs to be upgraded, the first power generation unit 31 and the first support plate 221 can be disassembled without complicated operations, effectively shortening downtime and reducing maintenance costs.

[0043] Preferably, the stator of the first power generation unit 31 is detachably connected to the main shaft 21.

[0044] In specific implementations, the first fastener includes, but is not limited to, screws, bolts, etc.

[0045] In one embodiment, the second power generation unit 32 is located on one side of the second support plate 222 along the axial direction of the main shaft 21, and the stator of the second power generation unit 32 is fixed on the main shaft 21, and the outer rotor of the second power generation unit 32 is fixedly connected to the second support plate 222.

[0046] In the above embodiment, the second power generation unit 32 is positioned on one side of the second support plate 222 along the axial direction of the main shaft 21 to avoid interference with the swept area of ​​the impeller 22. The stator of the second power generation unit 32 is securely fixed to the main shaft 21, and the outer rotor of the second power generation unit 32 is connected to the second support plate 222. This allows the second support plate 222 to directly drive the outer rotor of the second power generation unit 32 to rotate efficiently when the impeller 22 rotates, reducing intermediate links and losses in energy transfer and enabling the mechanical energy of the impeller 22 to be converted into electrical energy more quickly and fully. Simultaneously, the stator of the second power generation unit 32 being fixed to the main shaft 21 ensures the stability of the power generation process. Precise positioning and coordinated operation of each component effectively improve power generation efficiency and system reliability, ensuring that the second power generation unit 32 can stably output electrical energy.

[0047] In a specific implementation, the second power generation unit 32 is disposed below the second support plate 222.

[0048] In a specific implementation, the support assembly includes a support rod 11 and a cylindrical box, with the cylindrical box positioned at the top of the support rod 11; the wind turbine assembly is positioned above the cylindrical box; and the second power generation unit 32 is positioned between the support assembly and the second support plate 222.

[0049] In a specific implementation, the support rod 11 is an ultra-high performance concrete (UHPC) cement rod. Compared with ordinary concrete cement rods, its compressive strength reaches 100MPa-200MPa, its tensile strength is greater than or equal to 3.5MPa, and its bending strength is greater than or equal to 22MPa. Through steel fiber or hybrid fiber toughening, its impact resistance and fatigue resistance are enhanced. Compared with traditional concrete cement poles, the wall thickness is reduced by 50%, and the weight is reduced by 40% to 50%.

[0050] In specific implementations, the support rod 11 includes, but is not limited to, cement rods, metal rods, etc.

[0051] In one embodiment, the outer rotor of the second power generation unit 32 is detachably connected to the second support plate 222 via a second fastener.

[0052] In the above embodiment, the outer rotor of the second power generation unit 32 is detachably connected to the second support plate 222 via a second fastener, which improves the convenience of maintenance and repair of the second power generation unit 32. When the second power generation unit 32 malfunctions or needs to be upgraded, the second power generation unit 32 and the second support plate 222 can be disassembled without complicated operations, effectively shortening downtime and reducing maintenance costs.

[0053] Preferably, the stator of the second power generation unit 32 is detachably connected to the main shaft 21.

[0054] In specific implementations, the second fastener includes, but is not limited to, screws, bolts, etc.

[0055] In one embodiment, the first power generation unit 31 is a disc generator.

[0056] In the above embodiment, a disc generator is selected as the first power generation unit 31. It has a flat disc structure, small axial dimensions, and a compact structure, allowing for efficient installation and arrangement within a limited space. Furthermore, its air gap magnetic field distribution is more uniform, effectively reducing torque fluctuations and improving the stability and power quality of power generation. Moreover, the disc generator has a small rotor inertia and rapid dynamic response, enabling it to quickly adapt to wind speed changes and promptly convert wind energy into electrical energy, thereby improving wind energy capture efficiency, increasing power generation, and enhancing the adaptability and reliability of the entire wind power generation device under different wind conditions.

[0057] In one embodiment, the second power generation unit 32 is a disc generator.

[0058] In the above embodiment, a disc generator is selected as the second power generation unit 32. It has a flat disc structure, small axial dimensions, and a compact structure, allowing for efficient installation and arrangement within a limited space. Furthermore, its magnetic field distribution is more uniform, effectively reducing torque fluctuations and improving the stability and power quality of power generation. Moreover, the disc generator has a small rotor inertia and rapid dynamic response, enabling it to quickly adapt to changes in wind speed and promptly convert wind energy into electrical energy. This improves wind energy capture efficiency, increases power generation, and enhances the adaptability and reliability of the entire wind power generation device under different wind conditions.

[0059] In one embodiment, the main shaft 21, the impeller 22, the first power generation unit 31, and the second power generation unit 32 are coaxially arranged.

[0060] In the above embodiment, the main shaft 21, impeller 22, first power generation unit 31, and second power generation unit 32 are coaxially arranged, ensuring that the mechanical energy generated by the rotation of the impeller 22 can be efficiently and without deviation transmitted to the first power generation unit 31 and the second power generation unit 32 along a straight line. This reduces energy loss caused by eccentricity or angular deviation, greatly improving the conversion efficiency of wind energy to electricity. Furthermore, the coaxial design ensures uniform force distribution on each component, reducing vibration and wear caused by uneven force distribution, extending the overall service life of the wind power generation device, and reducing maintenance costs and downtime. Moreover, the coaxial arrangement of the main shaft 21, impeller 22, first power generation unit 31, and second power generation unit 32 results in a simple and orderly layout, facilitating installation, commissioning, and daily maintenance, thus improving the operational reliability and economy of the entire wind power generation device.

[0061] In one embodiment, the wind power generation device is a vertical axis wind power generation device.

[0062] It should be noted that, in this embodiment, the wind power generation device includes, but is not limited to, a vertical axis wind power generation device and a horizontal axis wind power generation device. Preferably, the wind power generation device is a vertical axis wind power generation device.

[0063] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A wind power generation device, characterized in that, include: Support components; The wind turbine assembly includes a main shaft (21) and an impeller (22), wherein the main shaft (21) is fixedly mounted on the support assembly, and the impeller (22) is rotatably mounted on the main shaft (21); The power generation assembly includes a first power generation unit (31) and a second power generation unit (32). The stators of the first power generation unit (31) and the second power generation unit (32) are both fixedly mounted on the main shaft (21). The outer rotors of the first power generation unit (31) and the second power generation unit (32) are both fixedly connected to the impeller (22).

2. The wind power generation device according to claim 1, characterized in that, The impeller (22) includes: The first support plate (221) is rotatably connected to the main shaft (21); The second support plate (222) is rotatably connected to the main shaft (21) and is spaced apart from the first support plate (221) along the extension direction of the main shaft (21); The blade (223) is connected at both ends to the first support plate (221) and the second support plate (222), respectively; The outer rotor of the first power generation unit (31) is connected to the first support plate (221), and the outer rotor of the second power generation unit (32) is connected to the second support plate (222).

3. The wind power generation device according to claim 2, characterized in that, The first power generation unit (31) is located on one side of the first support plate (221) along the axial direction of the main shaft (21), and the stator of the first power generation unit (31) is fixed on the main shaft (21), and the outer rotor of the first power generation unit (31) is fixedly connected to the first support plate (221).

4. The wind power generation device according to claim 3, characterized in that, The outer rotor of the first power generation unit (31) is detachably connected to the first support plate (221) via a first fastener.

5. The wind power generation device according to claim 2, characterized in that, The second power generation unit (32) is located on one side of the second support plate (222) along the axial direction of the main shaft (21), and the stator of the second power generation unit (32) is fixed on the main shaft (21), and the outer rotor of the second power generation unit (32) is fixedly connected to the second support plate (222).

6. The wind power generation device according to claim 5, characterized in that, The outer rotor of the second power generation unit (32) is detachably connected to the second support plate (222) via a second fastener.

7. The wind power generation device according to any one of claims 1 to 6, characterized in that, The first power generation unit (31) is a disc generator.

8. The wind power generation device according to any one of claims 1 to 6, characterized in that, The second power generation unit (32) is a disc generator.

9. The wind power generation device according to any one of claims 1 to 6, characterized in that, The main shaft (21), the impeller (22), the first power generation unit (31), and the second power generation unit (32) are arranged coaxially.

10. The wind power generation device according to any one of claims 1 to 6, characterized in that, The wind power generation device is a vertical axis wind power generation device.

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