A double vertical axis wind power generation device, system and power generation method

Abstract

This invention discloses a dual vertical axis wind power generation device, system, and method, including a wind turbine body with two horizontally parallel and vertically arranged rotating shafts. Each rotating shaft is equipped with swept blades, and the two rotating shafts can drive the corresponding swept blades to rotate independently around their own axes to perform work. A windward guide and shielding assembly is disposed on the windward side of the wind turbine body, extending along the rotation direction of the swept blades. A yaw adjustment mechanism is also included. This invention uses two horizontally parallel vertical rotating shafts, combined with multi-lobed swept blades, which significantly expands the effective swept area and significantly improves power generation compared to a single-axis structure. The two sets of blades are arranged in a stacked, interlocking manner in the non-power-performing rotation area, with their rotation trajectories interlocking into each other's gaps. This reduces the overall lateral width of the turbine while maintaining the total swept area, thus lowering the overall wind resistance and ensuring structural compactness.

Description

Technical Field

[0001] This invention relates to the field of power generation equipment technology, specifically to a dual vertical axis wind power generation device, system, and power generation method. Background Technology

[0002] With the growth in demand for distributed power supply, there is a clear demand for self-use power supply in scenarios such as scattered residents, small farms, small processing plants, villas, and nomadic herders who are far from the power grid. Small and medium-sized wind turbines with a power output of 1kW to 50kW that are suitable for such scenarios have a broad market space.

[0003] Currently, wind power equipment on the market is mainly divided into two categories: one is megawatt-class large horizontal axis wind turbines, which have high single-unit power but high investment costs, bulky size, and complicated installation, making them unsuitable for the electricity needs of distributed small users; the other is small wind turbines below 1kW, mostly used in low-load lighting scenarios such as wind-solar hybrid streetlights, whose output power is insufficient to meet the daily electricity needs of small and medium loads. Currently, there are few vertical axis wind power technology solutions and mature products suitable for small and medium power ranges on the market, resulting in a significant gap between supply and demand.

[0004] Most existing small and medium-sized wind turbines adopt a horizontal axis structure, which relies on long blades to capture wind energy and is equipped with a yaw wind-fighting system. This can achieve a large power generation capacity. However, when this type of structure is running, the blades have large centrifugal force and strong wind pressure, which can easily cause vibration resonance and stall risks, resulting in insufficient safety and stability.

[0005] Traditional vertical axis wind turbines mostly adopt a single-shaft structure with cylindrical or petal-shaped blades. They are fixedly installed on a vertical column, requiring no wind contact and allowing for wind access from all four directions. The overall center of gravity is downward, resulting in good stability. However, they suffer from several intractable structural defects: First, the lateral extension of the blades is limited, resulting in a small swept area and restricting power output. Second, while the front of the blades receives wind power, the back of the blades, rotating 180° to the same axis, is impacted by reverse airflow. The effective torque driving the shaft is the front lift minus the back drag, significantly reducing wind energy utilization efficiency. Third, the raised structure on the back of some deeply concave blades can obstruct the wind access channels of subsequent blades, further reducing the effective wind-receiving area. Existing layered dual-shaft vertical axis wind turbines only stack blade groups axially, failing to solve the core problem of reverse wind resistance, thus limiting power output improvement. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: A dual vertical axis wind power generation device, comprising: The main body of the fan has two rotating shafts arranged in parallel along the horizontal direction and vertically. Each rotating shaft is equipped with a sweeping blade. The two rotating shafts can drive the corresponding sweeping blades to rotate independently around their own axes to do work. A windward airflow guide and shielding assembly is disposed on the windward side of the main body of the fan, and the windward airflow guide and shielding assembly extends along the rotation direction of the sweeping blades; And a yaw adjustment mechanism, located on the leeward side of the main body of the wind turbine, configured to drive the main body of the wind turbine to rotate around its vertical axis so that the windward guide shielding component is aligned with the wind direction.

[0007] Preferably, the windward airflow guiding and shielding assembly includes an air-gathering section and a shielding section arranged sequentially along the airflow direction; The wind-gathering section includes a vertical arc-shaped wind guide hood, the windward surface of which is a convex curved surface, configured to gather the airflow in front and guide it to the working areas on both sides, thereby increasing the airflow density in the working areas. The shielding section includes an air hood connected to the rear of the air guide hood. The part of the sweeping blade swivel section located within the space enclosed by the air guide hood and the air hood is a non-operating area, and the part located outside the space enclosed by the air guide hood and the air hood is an operating area. The outline of the air hood tapers inward along the airflow discharge direction.

[0008] Preferably, the yaw adjustment mechanism includes: an upright long tail rudder disposed at the tail of the wind turbine body; and a rotating base disposed at the lower part of the wind turbine body and supporting the wind turbine body.

[0009] Preferably, the rotating base includes a steel pipe column and a load-bearing rotating mechanism sleeved on the top of the steel pipe column; The load-bearing rotation mechanism includes a tapered bearing, an umbrella-shaped large bearing arranged sequentially along the axial direction, and a rotating shaft disposed within the tapered bearing and the umbrella-shaped large bearing and rotatably connected to the steel pipe column through the tapered bearing and the umbrella-shaped large bearing, so that the main body of the fan can be rotatably installed on the steel pipe column through the load-bearing rotation mechanism.

[0010] Preferably, the main body of the fan is clamped and fixed between the lower steel plate support plate and the upper pressure plate; the steel plate support plate and the upper pressure plate are connected and fastened by two support columns, which are arranged circumferentially inside the cover of the windward guide shielding component.

[0011] Preferably, the rotating shafts are arranged side by side in the horizontal direction; the sweeping blades on the two rotating shafts are arranged in a stacked manner in the non-working rotation area, and the rotation trajectories of adjacent sweeping blades are inserted into each other's gaps; the sweeping trajectories of the sweeping blades on each rotating shaft in the working area are independent or complementary to each other, so as to expand the overall sweeping area.

[0012] Preferably, the sweeping blade has an asymmetrical cross-section, which includes a concave windward portion and a convex leeward portion; the sweeping blade is distributed in a multi-lobed, equidistant structure along the circumference of the rotation axis.

[0013] Preferably, it also includes a transmission and power generation assembly, which is disposed at the bottom of the wind turbine body; The transmission and power generation assembly includes two shaft-end gears, a central main gear shaft, a first transmission wheel, a second transmission wheel, and a generator. The two shaft-end gears are coaxially fixedly installed at the lower ends of two rotating shafts and rotate synchronously with the rotating shafts. One side of each shaft-end gear meshes with the central main gear shaft, and the other side meshes with the first transmission wheel. The other side of the first transmission wheel meshes with the second transmission wheel, and the second transmission wheel meshes with the input gear of the generator.

[0014] This invention also discloses a vertical axis wind power generation method, which utilizes the aforementioned dual vertical axis wind power generation device, comprising: In response to changes in ambient wind direction, the yaw adjustment mechanism drives the main body of the wind turbine to rotate around the vertical axis, so that the windward guide shielding component is aligned with the wind direction; The windward airflow guide and shielding component gathers the airflow in front and directs it to the working areas on both sides, thereby increasing the airflow density in the working areas and driving the sweeping blades in the working areas to rotate and perform work. The windward deflector and shielding assembly blocks the airflow from impacting the sweeping blades located in the non-working area, thereby reducing reverse wind resistance. The idler wheel shaft unifies the transmission direction of the two rotating shafts, synchronously driving the generator to operate and converting mechanical energy into electrical energy. The air intake shroud narrows the tail flow channel, guiding the airflow after work to be discharged in an orderly manner and avoiding tail vortices.

[0015] The present invention also discloses a wind power generation system, comprising: The basic support structure; and the aforementioned dual vertical axis wind power generation device, are installed on the basic support structure.

[0016] The advantages of this invention compared to the prior art are: Precisely adapted to low-to-medium power scenarios, with outstanding economic efficiency. (1) In this invention, the wind guide shroud and the air duct of the wind-facing guide shielding component form a closed non-working area, which completely covers the swirling section of the blade, physically blocking the front airflow from impacting the back of the rotating blade, solving the structural problem of "mutual cancellation of positive and negative forces" in traditional vertical axis wind turbines, so that the blades only retain the front working lift, and the wind energy conversion efficiency is significantly improved.

[0017] (2) The present invention adopts two horizontally arranged vertical rotating shafts and multi-lobed sweeping blades, which greatly expands the effective sweeping area and significantly improves the power generation compared with the single shaft structure. The two sets of blades are arranged in a stacked manner in the non-powering swirling area, and the swirling trajectory is embedded in the gap between each other. Under the premise of keeping the total sweeping area unchanged, the lateral width of the whole machine is compressed, which reduces the overall wind resistance and ensures the compactness of the structure.

[0018] (3) The convex curved surface of the front vertical arc-shaped air guide can gather the airflow in front and divert it to the working area on both sides, thereby increasing the airflow density and wind speed in the working area and enhancing the working capacity of the blades; the tail retractable air guide narrows the exhaust channel, guides the airflow after working to be discharged in an orderly manner, blocks the wake swirling path, avoids tail vortex and negative pressure suction, and reduces wake energy loss.

[0019] (4) The present invention is equipped with a yaw adjustment mechanism consisting of a vertical long tail rudder and a rotating base, which can automatically drive the unit to rotate around the vertical axis according to the change of the ambient wind direction, so that the front-end guide shielding component is always aligned with the direction of the wind. Unlike the traditional fixed-installation vertical axis fan, it can maintain a high-efficiency wind energy capture state under changing wind conditions.

[0020] (5) The present invention uses a multi-stage gear transmission group to unify the direction of rotation of two opposing rotating shafts, realizes the synchronous convergence of dual-shaft power and jointly drives the generator, solves the problem of transmission interference between the two opposing shafts, and has high power output efficiency; the generator is equipped with a brush contact device, which can stably transmit electrical energy to the outside when the whole machine is yawing, avoiding the problem of cable entanglement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the front part of the present invention.

[0022] Figure 2 This is a schematic diagram of the rear structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the side structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the planar structure of the main body of the wind turbine in this invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the main body of the wind turbine in this invention.

[0026] Figure 6 This is a schematic diagram of the overall support frame in this invention.

[0027] Figure 7 This is a schematic diagram of the rotating base in this invention.

[0028] Figure 8This is a schematic diagram of the internal structure of the rotating base in this invention.

[0029] Figure 9 This is a schematic diagram of the transmission and power generation components in this invention.

[0030] In the diagram: 100-Wind turbine body; 101-Rotating shaft; 102-Sweeped blades; 200-Wind guide shielding assembly; 201-Wind gathering section; 202-Shielding section; 203-Wind duct; 300-Yaw adjustment mechanism; 301-Vertical long tail rudder; 302-Rotating base; 302a-Steel pipe column; 302b-Conical bearing; 302c-Umbrella-shaped large bearing; 302d-Rotating shaft; 400-Entire machine support frame; 401-Lower steel plate support plate; 402-Upper pressure plate; 403-Support column; 500-Transmission and power generation components; 501-Shaft end gear; 502-Intermediate main gear shaft; 503-First transmission wheel; 504-Second transmission wheel; 505-Generator; 506-Input gear; 600-Foundation support structure. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of the present invention, "multiple" means at least two.

[0035] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances. Example

[0036] The dual vertical axis wind power generation device in this embodiment mainly includes five parts: wind turbine body 100, windward guide and shielding component 200, yaw adjustment mechanism 300, whole machine support frame 400, and transmission and power generation component 500.

[0037] The wind turbine body 100 includes at least two vertically arranged rotating shafts 101, with swept blades 102 mounted on the rotating shafts 101 to capture wind energy and convert it into rotational mechanical energy. An oncoming windward guide and shielding assembly 200 is located on the windward side of the wind turbine body 100 and extends along the blade rotation direction to cover the non-operating area, serving to divert and enhance energy, isolate reverse wind resistance, and guide the wake to be discharged in an orderly manner. A yaw adjustment mechanism 300 is connected to the wind turbine body 100, driving the wind turbine body 100 to rotate, ensuring the guide assembly is always aligned with the oncoming wind direction. A whole-machine support frame 400 is used to support and fix various functional components, ensuring the overall structural rigidity. A transmission and power generation assembly 500 is used to gather the power from both shafts and convert it into stable electrical energy output.

[0038] Specifically, the sweeping blades 102 adopt an asymmetrical cross-sectional structure, including a concave windward portion and a convex leeward portion, which are evenly distributed in multiple symmetrical segments along the circumference of the rotation axis 101, generating a continuous and stable rotational torque under the action of airflow. The sweeping trajectories of the sweeping blades 102 on the two rotation axes 101 are independent in the working area, and they are spliced ​​together to form an integral sweeping surface; in the non-working swirling area, the two sets of sweeping blades 102 are arranged in a stacked interleaved manner: along the lateral projection direction, the rotating end of one side of the sweeping blade 102 extends into the rotation gap of the adjacent sweeping blade 102 on the other side, and the rotation trajectories of the two sets of blades do not interfere with each other. This stacked interleaved structure can compress the lateral width occupied in the non-working area, reduce the overall lateral width of the windward guide and shielding assembly 200 while keeping the total sweeping area unchanged, reduce the wind resistance of the whole machine, and simultaneously expand the effective sweeping surface width of the working area.

[0039] The windward guiding and shielding assembly 200 is divided into a concentrating section 201 and a shielding section 202 along the airflow direction, and is entirely covered on the outside of the main body 100 of the fan. The concentrating section 201 is a vertical arc-shaped wind guide shroud, and its windward surface is a smooth, outwardly convex curved surface. When the airflow passes through the concentrating section 201, the outwardly convex curved surface gathers the airflow and diverts it to the working areas on the left and right sides, increasing the airflow speed and density in the working areas and enhancing the working capacity of the blades. The shielding section 202 is formed by the rearward extension of the side wall of the concentrating section 201 and the rear air intake shroud 203, completely covering the non-working swirling area of ​​the swept blades 102. All the swept blades 102 in the swirling state are located within the internal space enclosed by the wind guide shroud and the air intake shroud 203. This structure can prevent the frontal airflow from directly impacting the back of the blades in the non-working area, physically isolating the reverse airflow and eliminating the reverse wind resistance during the blade rotation process.

[0040] The air intake shroud 203 is connected to the rear end of the air gathering section 201. Its overall outline gradually narrows inward along the airflow discharge direction (from front to back), forming a narrowed tail flow channel. After the airflow has done work, it enters the tail flow channel after passing through the work area and is quickly guided outward along the narrowed flow channel outline. The narrowed flow channel structure eliminates the tail swirling space, blocks the wake swirling path, avoids the formation of vortices and negative pressure suction at the rear, ensures smooth airflow out, and reduces wake energy loss.

[0041] The yaw adjustment mechanism 300 includes a vertical long tail rudder 301 and a rotating base 302, used to realize automatic wind adjustment of the unit. The vertical long tail rudder 301 is fixedly installed at the tail of the wind turbine body 100, extending vertically, and has a large windward rudder surface area. When the ambient wind direction changes, the airflow acts on the rudder surface of the long tail rudder, generating a large yaw moment, driving the wind turbine body 100 to rotate around the vertical axis, quickly responding to changes in wind direction, and ensuring that the front windward guide shielding component 200 is always aligned with the oncoming wind direction, thus ensuring wind energy capture efficiency.

[0042] The rotating base 302 includes a steel pipe column 302a and a load-bearing rotating mechanism. The steel pipe column 302a is a hollow steel pipe structure, which is vertically set as the main support carrier of the whole machine and supports the whole wind power generation device. The load-bearing rotating mechanism is sleeved on the top of the steel pipe column 302a, and the wind turbine body 100 is rotatably installed on the steel pipe column 302a through the load-bearing rotating mechanism.

[0043] The load-bearing rotation mechanism includes a conical bearing 302b and an umbrella-shaped large bearing 302c arranged sequentially from bottom to top along the axial direction, and a rotating shaft 302d disposed within the conical bearing 302b and the umbrella-shaped large bearing 302c. The top of the rotating shaft 302d is connected to the overall support frame 400, and the bottom is rotatably connected to the steel pipe column 302a through the conical bearing 302b and the umbrella-shaped large bearing 302c. The umbrella-shaped large bearing 302c is the main load-bearing component, used to bear the axial load of the entire unit's self-weight and the overturning moment generated by the wind. The conical bearing 302b is used to bear the radial wind load and provide radial restraint for the rotating structure. The cooperation of the two bearings allows the fan body 100 to rotate freely around the vertical axis of the steel pipe column 302a, while maintaining stable operation under its own weight and strong wind loads, avoiding jamming, shaking, and structural deformation.

[0044] The main body 100 of the fan adopts a clamping type whole machine support frame 400, including a lower steel plate base plate 401 and an upper pressure plate 402. The rotating shaft 101, the windward guide and shielding component 200, the transmission components, etc. of the entire fan body 100 are clamped and fixed between the lower steel plate base plate 401 and the upper pressure plate 402, forming an integrated rotatable whole machine structure.

[0045] The steel plate base plate and the upper pressure plate 402 are connected and fastened by two support columns 403. The four support columns 403 are evenly spaced along the circumference to form a stable multi-column support system, which improves the structural rigidity and wind deformation resistance of the whole machine.

[0046] Both supporting columns 403 are housed entirely within the enclosure of the windward guiding and shielding assembly 200 (i.e., within the inner cavities of the wind guide and air intake hood 203), and do not protrude from the outer windward surface of the enclosure. This arrangement eliminates the need for additional support structures outside the enclosure, avoids increasing the windward area and wind resistance, and simultaneously ensures a clean and smooth external profile for the device.

[0047] The transmission and power generation component 500 is located at the bottom of the wind turbine body 100, specifically installed on the lower part of the lower steel plate support plate 401, and is used to gather the power of the dual shafts and drive the generator 505 to generate electricity.

[0048] The transmission and power generation assembly 500 includes two shaft-end gears 501, a central main gear shaft 502, a first transmission wheel 503, a second transmission wheel 504, and a generator 505. The two shaft-end gears 501 are coaxially fixedly installed at the lower ends of two rotating shafts 101 and rotate synchronously with the rotating shafts 101.

[0049] Since the two rotating shafts 101 are located on the left and right sides of the working area respectively, they rotate in opposite directions under the drive of airflow: one rotating shaft 101 rotates clockwise, and the other rotating shaft 101 rotates counterclockwise. One side of the shaft-end gear 501 meshes with the middle main gear shaft 502 for transmission, and the other side meshes with the first transmission wheel 503. The other side of the first transmission wheel 503 meshes with the second transmission wheel 504, and the second transmission wheel 504 meshes with the input gear 506 of the generator 505.

[0050] Through the transition of the first transmission wheel 503 and the second transmission wheel 504, the power of the two rotating shafts 101 is input to the intermediate main gear shaft 502 in the same direction, realizing synchronous power output of the two rotating shafts 101 and jointly driving the intermediate main gear shaft 502 to rotate. This effectively solves the driving interference problem of the two opposing shafts and improves the power output efficiency. In this embodiment, the shaft end gear 501, the first transmission wheel 503, and the second transmission wheel 504 are all coaxial double gears. The generator 505 is equipped with a brush contact device (slip ring brush structure), which can stably transmit the electrical energy generated by the generator 505 to the outside when the wind turbine body 100 is rotating in a yaw state, thus avoiding the cable tangling caused by the rotation of the unit.

[0051] The power generation method using the above-mentioned dual vertical axis wind power generation device specifically includes the following steps: (1) Automatic yaw adjustment: When the ambient wind direction changes, the airflow acts on the vertical long tail rudder 301 at the tail of the fan, generating a yaw torque to drive the main body 100 of the fan to rotate around the vertical axis of the steel pipe column 302a, so that the front windward guide shielding component 200 is aligned with the direction of the incoming wind, thus completing the automatic wind adjustment.

[0052] (2) Guided flow and wind resistance reduction: After the airflow in front comes into contact with the vertical arc-shaped guide hood, it is gathered by the outward convex windward surface and diverted to the working area on both sides, increasing the airflow density in the working area and driving the sweeping blades 102 in the working area to rotate, converting wind energy into the mechanical energy of the rotating shaft 101; at the same time, the non-working area formed by the guide hood and the wind duct 203 isolates the airflow in front, and the sweeping blades 102 in the swirling state are not impacted by the reverse airflow, eliminating the reverse wind resistance.

[0053] (3) Dual-shaft synchronous transmission: Two rotating shafts 101 with opposite directions drive their respective shaft end gears 501 to rotate; the power of the two rotating shafts 101 is transmitted through the first transmission wheel 503 and the second transmission wheel 504 and then drives the input gear 506 of the generator 505 to rotate in the same direction, so as to realize the convergence of dual-shaft power and synchronous output.

[0054] (4) Orderly discharge of the wake: The airflow after doing work flows to the rear of the device and enters the narrowed tail flow channel formed by the hood 203. It is quickly guided out of the device along the flow channel outline. The narrowed flow channel structure blocks the wake swirling space, avoids the formation of vortex and negative pressure suction at the tail, and reduces the energy loss of the wake.

[0055] (5) Stable output of electrical energy: The generator converts the input mechanical energy into electrical energy and outputs it stably to the outside through the brush contact device when the unit is yawing, thus completing the complete wind power generation process.

[0056] This embodiment also provides a wind power generation system, including a foundation support structure 600 and the aforementioned dual vertical axis wind power generation device. The dual vertical axis wind power generation device is fixedly installed on the foundation support structure 600 via steel pipe columns 302a. The foundation support structure 600 can take various forms such as concrete foundations, matching towers, and building roof bases, and is suitable for various application scenarios such as distributed residential power supply, road lighting power supply, and independent power supply in remote areas.

[0057] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A dual vertical axis wind power generation device, characterized in that, include: The main body of the fan (100) has two rotating shafts (101) arranged in parallel along the horizontal direction and vertically. Each of the rotating shafts (101) is equipped with a sweeping blade (102). The two rotating shafts (101) can drive the corresponding sweeping blade (102) to rotate independently around its own axis to do work. A windward guide shielding assembly (200) is disposed on the windward side of the main body of the fan (100), and the windward guide shielding assembly (200) extends along the rotation direction of the sweeping blades (102); And a yaw adjustment mechanism (300) is provided on the leeward side of the fan body (100) and configured to drive the fan body (100) to rotate around its vertical axis so that the windward guide shielding assembly (200) is aligned with the wind direction.

2. The dual vertical axis wind power generation device according to claim 1, characterized in that, The windward airflow guiding and shielding assembly (200) includes an air-gathering section (201) and a shielding section (202) arranged sequentially along the airflow direction. The wind-gathering section (201) includes a vertical arc-shaped wind guide hood, the windward surface of which is a convex curved surface, configured to gather the frontal airflow and guide it to the working areas on both sides, thereby increasing the airflow density of the working areas. The shielding section (202) includes an air hood (203), which is connected to the rear of the air guide hood. The part of the swirling section of the sweeping blades (102) within the space enclosed by the air guide hood and the air hood (203) is a non-working area, and the part outside the space enclosed by the air guide hood and the air hood (203) is a working area. The outline of the air hood (203) contracts inward along the airflow discharge direction.

3. The dual vertical axis wind power generation device according to claim 1, characterized in that, The yaw adjustment mechanism (300) includes: an upright long tail rudder (301) disposed at the tail of the wind turbine body (100); and a rotating base (302) disposed at the lower part of the wind turbine body (100) and supporting the wind turbine body (100).

4. The dual vertical axis wind power generation device according to claim 3, characterized in that, The rotating base (302) includes a steel pipe column (302a) and a load-bearing rotating mechanism sleeved on the top of the steel pipe column (302a); The load-bearing rotation mechanism includes a conical bearing (302b), an umbrella-shaped large bearing (302c) arranged sequentially along the axial direction, and a rotating shaft (302d) disposed within the conical bearing (302b) and the umbrella-shaped large bearing (302c) and rotatably connected to the steel pipe column (302a) through the conical bearing (302b) and the umbrella-shaped large bearing (302c), so that the fan body (100) can be rotatably mounted on the steel pipe column (302a) through the load-bearing rotation mechanism.

5. The dual vertical axis wind power generation device according to claim 1, characterized in that, The main body (100) of the fan is clamped and fixed between the lower steel plate support plate (401) and the upper pressure plate (402); the steel plate support plate (401) and the upper pressure plate (402) are connected and fastened by two support columns (403), and the two support columns (403) are arranged circumferentially at intervals inside the cover of the windward guide shielding assembly (200).

6. The dual vertical axis wind power generation device according to claim 1, characterized in that, The sweeping blades (102) on the two rotating shafts (101) are arranged in a stacked manner in the non-working rotation area, and the rotation trajectories of adjacent sweeping blades (102) are inserted into each other's gaps; the sweeping trajectories of the sweeping blades (102) on each rotating shaft (101) in the working area are independent or complementary to each other, so as to expand the overall sweeping area.

7. The dual vertical axis wind power generation device according to claim 6, characterized in that, The sweeping blade (102) has an asymmetrical cross section, which includes a concave windward part and a convex leeward part; the sweeping blade (102) is distributed in a multi-lobed equidistant structure along the circumference of the rotation axis (101).

8. The dual vertical axis wind power generation device according to claim 1, characterized in that, It also includes a transmission and power generation assembly (500), which is disposed at the bottom of the wind turbine body (100); The transmission and power generation assembly (500) includes two shaft-end gears (501), an intermediate main gear shaft (502), a first transmission wheel (503), a second transmission wheel (504), and a generator (505). The two shaft-end gears (501) are coaxially fixedly installed at the lower ends of two rotating shafts (101) and rotate synchronously with the rotating shafts (101). One side of the shaft-end gear (501) meshes with the intermediate main gear shaft (502) for transmission, and the other side meshes with the first transmission wheel (503). The other side of the first transmission wheel (503) meshes with the second transmission wheel (504), and the second transmission wheel (504) meshes with the input gear (506) of the generator (505).

9. A vertical axis wind power generation method, applied to a dual vertical axis wind power generation device as described in any one of claims 1 to 8, characterized in that, include: In response to changes in the ambient wind direction, the yaw adjustment mechanism (300) drives the main body of the wind turbine (100) to rotate around the vertical axis, so that the windward guide shielding assembly (200) is aligned with the wind direction; The front airflow is gathered and directed to the working areas on both sides by the windward guide shielding component (200), thereby increasing the airflow density in the working areas and driving the two sets of sweeping blades (102) in the working areas to rotate and perform work with the corresponding rotation axis (101). The windward guide shielding assembly (200) blocks the airflow from impacting the sweeping blades (102) located in the non-working area, thereby reducing reverse wind resistance. The intermediate main gear shaft unifies the transmission direction of the dual rotating shafts (101), synchronously driving the generator (505) to operate and converting mechanical energy into electrical energy. The tail flow channel is narrowed by the air hood (203), which guides the airflow after work to be discharged in an orderly manner and avoids tail vortex.

10. A wind power generation system, characterized in that, include: Basic support structure (600); And a dual vertical axis wind power generation device as described in any one of claims 1 to 8, installed on the foundation support structure (600).

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