Miniature vertical axis wind turbine started at low wind speed

Abstract

The utility model discloses a miniature vertical axis wind driven generator started at low wind speed, which comprises a shaft lever, a generator, at least two fan blades mounted on the shaft lever, a guide plate, a top plate and a bottom plate, the top plate and the bottom plate are respectively arranged at the upper end and the lower end of the shaft lever, and the top plate, the bottom plate and the shaft lever are coaxial; the plurality of flow guide plates are annularly and uniformly distributed between the top plate and the bottom plate, are columnar covers with hollow side surfaces and surround the peripheries of the fan blades; the guide plates incline towards the same side by the same angle. The guide plates are additionally arranged on the periphery of a traditional vertical-axis wind driven generator to collect wind flow, so that the starting wind speed of the vertical-axis wind driven generator is reduced, power can still be generated under the weak wind condition, the adaptability of the vertical-axis wind driven generator is improved, the vertical-axis wind driven generator can be popularized in a breeze area possibly, the structure is simple, and the annual power generation hours are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, and particularly relates to a micro vertical axis wind turbine with low wind speed start-up. Background Art

[0002] The micro vertical axis wind turbine is a miniaturized wind turbine, which has a simple and light structure, can be designed in a miniaturized and integrated manner, and is suitable for various small devices and places, such as unmanned aerial vehicles, household appliances, mobile devices, etc. With the rapid development of fields such as the Internet of Things and smart home, the energy demand of these devices is also increasing continuously. The micro vertical axis wind turbine is expected to become a new energy solution. The micro vertical axis wind turbine also has the advantages of low noise, low energy consumption, low maintenance cost, etc., so it also has great potential in the construction of densely populated areas such as cities and parks. Through reasonable planning and design, the micro vertical axis wind turbine can become an important part of urban green energy and provide support for the sustainable development of the city.

[0003] Nowadays, the traditional vertical axis wind turbine drives the fan blades to rotate by the wind pressure difference between the fan blades. However, the wind direction of the parallel fan blades causes a small wind pressure difference, resulting in the inability to start the fan at low wind speeds, and causing problems such as poor wind energy utilization rate and low power generation hours. Summary of the Utility Model

[0004] Aiming at the defects existing in the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a micro vertical axis wind turbine that can increase the wind pressure difference between the fan blades, thereby reducing the start-up wind speed of the vertical axis wind turbine and realizing low wind speed start-up.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: A micro vertical axis wind turbine with low wind speed start-up, including a shaft rod, a generator, and fan blades installed on the shaft rod. There are at least 2 fan blades. The generator is arranged at one end of the shaft rod. It also includes a flow guide plate, and a top plate and a bottom plate respectively arranged at the upper end and the lower end of the shaft rod. The top plate, the bottom plate and the shaft rod are coaxial. A plurality of the flow guide plates are circumferentially and evenly arranged between the top plate and the bottom plate to form a columnar cover with a hollow side surface, and surround the fan blades. The flow guide plates are all inclined at the same angle to the same side.

[0006] Preferably, the top plate and the bottom plate are circular plates with the same diameter, and the outer sides of the flow guide plates are flush with the edges of the top plate and the bottom plate.

[0007] Preferably, the number of the fan blades is 2, 3 or 4, and at least 2 stiffeners are arranged along the height direction on the inner side of the fan blades.

[0008] Preferably, the number of the stiffeners is 2, 3 or 4, and the stiffeners are stiffening rods or semi-circular stiffening plates.

[0009] Preferably, the generator is a cylindrical permanent magnet generator with a diameter of 40 cm, which is arranged at the bottom end of the shaft rod, and a vertical rod is provided at the bottom end of the generator.

[0010] Preferably, the materials of the guide vane, the top plate and the bottom plate are wooden board, steel plate, aluminum plate, plastic plate or high molecular material plate.

[0011] Preferably, the length of the shaft rod is 60 cm.

[0012] The beneficial effects of the present utility model are as follows: by adding guide vanes around the traditional vertical axis wind turbine to collect the wind flow, the starting wind speed of the vertical axis wind turbine is reduced, and it can still generate electricity under weak wind conditions, improving the adaptability of the vertical axis wind turbine and making it possible to promote in the gentle breeze area. The structure is simple and the annual power generation hours are increased. Description of the Drawings

[0013] Figure 1 is the structural schematic diagram of the present utility model;

[0014] Figure 2 is the front view of the present utility model;

[0015] Figure 3 is the top view of the present utility model;

[0016] Figure 4 is the flow guiding schematic diagram of the guide vane;

[0017] Figure 5 is the structural schematic diagram of the blade;

[0018] In the figure: 1 - fan blade, 2 - guide vane, 3 - top plate, 4 - shaft rod, 5 - bottom plate, 6 - generator, 7 - vertical rod, 8 - stiffening member. Detailed Embodiments

[0019] In order to better understand the improvements made by the present utility model compared with the prior art, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0020] As Figure 1 shown in FIGS. 4 - 5, a low - wind - speed - starting micro - vertical - axis wind turbine mainly consists of a shaft rod 4, a generator 6 and fan blades 1 installed on the shaft rod 4, and further comprises a guide vane 2 and a top plate 3 and a bottom plate 5 respectively arranged at the upper end and the lower end of the shaft rod 4. The top plate 3, the bottom plate 5 and the shaft rod 4 are coaxial, and the generator 6 is arranged at one end of the shaft rod 4. The length of the shaft rod 4 is preferably 60 cm.

[0021] There are at least 2 fan blades 1, preferably 2, 3 or 4 fan blades, and at least 2 stiffeners 8 are arranged along the height direction on the inner side of the fan blades 1. The number of the stiffeners 8 is preferably 2, 3 or 4, and the stiffeners 8 are stiffening rods or semi-circular stiffening plates matching the shape of the fan blades 1.

[0022] A number of flow guiding plates 2 are circumferentially and evenly arranged between the top plate 3 and the bottom plate 5 to form a columnar cover with a hollow side, and surround the fan blades 1. While collecting the air flow, the air flow that hinders the rotation of the fan blades on the other side is weakened, thereby reducing the starting wind speed of the vertical axis wind turbine. Among them, the top plate 3 and the bottom plate 5 are preferably circular plates with the same diameter, and the outer sides of the flow guiding plates 2 are flush with the edges of the top plate 3 and the bottom plate 5. To ensure that the flow guiding plates 2 can adapt to all-round wind directions, the flow guiding plates 2 are preferably inclined at the same angle to the same side. The materials of the flow guiding plates 2, the top plate 3 and the bottom plate 5 can be wooden plates, steel plates, aluminum plates, plastic plates or polymer material plates.

[0023] The generator 6 is a cylindrical permanent magnet generator with a diameter of 40 cm. It is arranged at the bottom end of the shaft rod 4, and a vertical rod 7 is arranged at the bottom end of the generator 6 and fixed in the foundation. The fan blades 1 drive the shaft rod 4 to rotate, so that the permanent magnet generator generates electricity.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A micro vertical axis wind turbine generator capable of starting at low wind speed, comprising a shaft (4), a generator (6) and a fan blade (1) mounted on the shaft (4), wherein the fan blade (1) has at least two blades, and the generator (6) is arranged at one end of the shaft (4), characterized in that: It also comprises a guide plate (2) and a top plate (3) and a bottom plate (5) respectively arranged at the upper end and the lower end of the shaft (4), wherein the top plate (3), the bottom plate (5) and the shaft (4) are coaxial; a plurality of the guide plates (2) are evenly distributed in an annular direction and arranged between the top plate (3) and the bottom plate (5) to form a columnar cover with hollowed-out sides, and surround the periphery of the fan blade (1); the guide plates (2) are all inclined at the same angle to the same side.

2. A low wind speed start micro vertical axis wind turbine according to claim 1, characterized in that: The top plate (3) and the bottom plate (5) are circular plates with the same diameter, and the outer side of the guide plate (2) is flush with the edges of the top plate (3) and the bottom plate (5).

3. The low wind speed start micro vertical axis wind turbine according to claim 1, characterized in that: The number of the fan blades (1) is 2, 3 or 4, and at least 2 stiffening members (8) are provided on the inner side of the fan blades (1) along the height direction.

4. The low wind speed start micro vertical axis wind turbine according to claim 3, characterized in that: The number of the stiffening members (8) is 2, 3 or 4, and the stiffening members (8) are stiffening rods or semicircular stiffening plates.

5. The low wind speed start micro vertical axis wind turbine according to claim 1, characterized in that: The generator (6) is a cylindrical permanent magnet generator with a diameter of 40 cm, which is arranged at the bottom end of the shaft (4), and a vertical pole (7) is provided at the bottom end of the generator (6).

6. The low wind speed start micro vertical axis wind turbine according to claim 1, characterized in that: The guide plate (2), the top plate (3) and the bottom plate (5) are made of wood, steel, aluminum, plastic or polymer material.

7. The low wind speed start micro vertical axis wind turbine according to claim 1, characterized in that: The shaft rod (4) is 60 cm long.

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