Vertical axis wind driven generator with wind wheel of wind collecting body with annular cage structure

Abstract

The utility model relates to the technical field of wind power generation, in particular to a vertical axis wind driven generator with an annular cage structure wind collecting body wind wheel, which comprises a rotating shaft, the annular cage structure wind collecting body wind wheel connected with the rotating shaft and a generator body connected with the rotating shaft. The annular cage structure wind collecting body wind wheel is used for driving the rotating shaft to rotate around the axis of the rotating shaft in the vertical plane and comprises at least one vertical blade and an annular cage structure connected to the vertical blade. The annular cage cover structure is formed by stacking a diffusion ring located at the top and a plurality of concentric variable-diameter slice rings of a concentric variable-diameter slice ring set on the lower portion of the diffusion ring, and a wind collecting body structure used for guiding flow and increasing the wind speed through negative pressure suction is formed. The wind energy capturing capacity of the wind driven generator is improved, so that the wind energy utilization rate is improved, and the power generation efficiency is effectively improved through the innovative design of the wind wheel. The system is low in cost, high in reliability and suitable for low-wind-speed areas such as cities and mountainous areas, and has economical efficiency and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically a vertical axis wind turbine with a wind collector and a wind turbine with an annular enclosure structure. Background Technology

[0002] As an important component of renewable energy, wind power is playing an increasingly crucial role in the global transition to a low-carbon and clean energy structure. Especially in areas with low wind density, such as cities and rural areas, developing new wind power technologies suitable for low-wind environments is a key research direction for the wind power industry.

[0003] However, the efficient utilization of wind power still faces many challenges, mainly manifested in high wind speed thresholds, low wind energy utilization efficiency, and large wind speed fluctuations. In areas with low wind energy density, wind power generation efficiency is affected by a variety of factors, among which the real number and wind speed are the most critical. The real number is a dimensionless parameter in wind turbine design, used to measure the ratio of the projected area of ​​the wind turbine blades on the rotor's plane of rotation to the swept area. Its magnitude directly affects the wind energy capture capacity and mechanical load characteristics. Too large a real number may lead to increased air resistance, decreased efficiency, and vibration and noise; while too small a real number will reduce the airflow disturbance effect, resulting in unsatisfactory wind energy capture efficiency. Therefore, how to reasonably design the real number according to the actual application scenario is one of the keys to improving wind turbine performance. Wind speed is also an important factor affecting wind power efficiency. Wind turbines usually require a certain wind speed to generate electricity, and the generated power is proportional to the cube of the wind speed, which means that even a small change in wind speed can cause drastic fluctuations in output power. Especially in urban environments, wind speed is significantly affected by buildings, exhibiting strong instability and directional randomness, further increasing the design difficulty of wind power equipment. Therefore, improving wind speed adaptability and energy capture capabilities in variable wind fields is a pressing challenge that wind power generation technology needs to address in low-wind environments.

[0004] To address these issues, researchers have proposed various structural innovations to improve wind energy utilization efficiency. For example, the diffuser-enhanced wind turbine (DAWT) optimizes the airflow path by incorporating a diffuser structure outside the rotor, creating localized negative pressure. This increases the mass flow rate and velocity through the rotor, thereby improving power generation efficiency. While this structure performs well in improving wind collection efficiency, it also has drawbacks: diffuser structures are typically large, significantly increasing added mass and wind load, leading to higher requirements for tower strength, foundation structure, and maintenance costs, thus limiting its adoption in low-cost, lightweight applications.

[0005] For example, patent EP21199951.1 discloses an omnidirectional vertical axis wind power generation device with a casing, including a casing, a collection chamber, concentric blade rings, a rotor, and a generator. This wind turbine can receive airflow from different directions and guide the airflow upward through the casing structure. The advantage of the proposed wind turbine is that it is very suitable for arranging the rotor above the casing structure. Another example is Chinese patent CN108730113A, which discloses a wind-gathering device suitable for light wind conditions. Its structure includes a trumpet-shaped lateral wind-gathering port, a negative pressure chamber, and flow-stabilizing blades. By forming a local negative pressure zone, it guides the airflow to converge, thereby improving turbine efficiency.

[0006] Although the above scheme has the ability to collect air in multiple directions, it has the following limitations: First, it only has an air inlet and relies on the wind collected by the air inlet to generate electricity, resulting in low wind collection efficiency and low power generation efficiency; Second, it does not have the ability to collect turbulence in the wind and can only collect wind in a single direction.

[0007] To address the aforementioned issues, there is an urgent need for a high-efficiency wind power generation device that is structurally simple, can effectively gather omnidirectional micro-winds, has excellent wind speed adaptability, and is suitable for areas with low wind energy density. Utility Model Content

[0008] To address the shortcomings of existing technologies, this invention provides a vertical axis wind turbine with a wind turbine rotor featuring a ring-shaped enclosed structure. This optimization comprehensively considers two core factors: real number and wind speed. Through innovative rotor design, it improves the power generation efficiency, reduces costs, and enhances reliability of the wind turbine. It aims to provide strong support for the further development of wind power technology and promote the wind power industry towards greater efficiency, reliability, and economy.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a vertical axis wind turbine with an annular shroud structure wind collector impeller, comprising a rotating shaft and an annular shroud structure wind collector impeller and a generator body connected to the rotating shaft. The annular shroud structure wind collector impeller drives the rotating shaft to rotate around the axis of the rotating shaft in a vertical plane. The annular shroud structure wind collector impeller includes at least one vertical blade and an annular shroud structure connected to the vertical blade. The annular shroud structure includes a diffuser ring at the top and a concentric variable-diameter thin-plate ring group below the diffuser ring. Multiple concentric variable-diameter thin-plate rings of the concentric variable-diameter thin-plate ring group are stacked and arranged to form a wind collector structure for guiding airflow and enhancing wind speed through negative pressure suction. The airflow acts on both the outer and inner walls of the annular shroud structure wind collector impeller, resulting in multiple work operations. The ratio of the projected area of ​​the smallest cross-section of the diffuser ring at the top of the annular shroud structure wind collector impeller to the plane orthogonal to the impeller's axis of symmetry is small, accelerating the exhaust of air to allow more air to enter, thus providing particularly high efficiency.

[0010] Furthermore, the annular enclosure structure can receive ambient airflow in a 360° circumference, and guide the airflow inward and accelerate its output through concentric variable diameter thin-plate rings stacked on top of each other, and exhaust the air upward through a negative pressure "suction effect".

[0011] Furthermore, the vertical cross-section of the diffuser ring has an arc-shaped structure, forming a gradually narrowing and expanding airflow channel. The narrowing of the pipe diameter in the middle accelerates the airflow. The upper opening of the diffuser ring is the output end of the airflow, where the airflow is discharged at a departure wind speed V1. The Venturi effect formed by its arc-shaped structure guides the airflow to accelerate and generate a negative pressure suction effect, making the departure wind speed V1 at the output end higher than the ambient wind speed V0. The lower end of the diffuser ring is provided with an outwardly expanding skirt, and the concentric variable diameter thin-plate ring group at the bottom is placed inside it to effectively collect air and guide the airflow to flow inward to generate a suction effect.

[0012] Furthermore, the concentric variable-diameter thin-plate rings of the concentric variable-diameter thin-plate ring assembly form an air intake slit. Therefore, the upper concentric variable-diameter thin-plate ring will discharge air at a slightly higher speed, and the upper slit will generate a negative pressure suction effect on the lower slit. This will produce a favorable airflow combination effect in the air collector.

[0013] Furthermore, the sheet rings of the concentric variable diameter sheet ring assembly have a uniform oblique cross-sectional profile, a circular arc vertical cross-sectional profile, or an airfoil profile. A uniform oblique cross-sectional profile is advantageous from the perspective of material and production costs, while the latter is beneficial in terms of efficiency.

[0014] Furthermore, the multiple concentric variable diameter thin-plate rings of the concentric variable diameter thin-plate ring assembly are arranged in an alternating stacked manner, including a top-down flow guide ring, a gathering ring, and a conical flow guide unit composed of multiple concentric variable diameter thin-plate rings.

[0015] Furthermore, the guide ring is a concentric variable diameter thin sheet ring that is narrower at the top and wider at the bottom. The upper opening of the guide ring is close to the rotation axis while the lower opening is far from the rotation axis. Its upper opening is embedded inside the skirt of the diffuser ring, and its lower opening is flush with the edge of the skirt of the diffuser ring in the vertical direction.

[0016] Furthermore, the gathering ring consists of two parts: the upper part is a concentric variable diameter thin sheet ring that is narrower at the top and wider at the bottom, and the lower part is a concentric variable diameter thin sheet ring that is wider at the top and narrower at the bottom. The connection between the two parts forms an obtuse angle bend, and its vertical cross-section is an obtuse angle broken line shape.

[0017] Furthermore, the multiple concentric variable diameter thin-film rings of the conical flow guiding unit are stacked in a progressively larger manner from bottom to top, with the upper diameter of each ring being larger than the lower diameter and the lower opening being adjacent to the rotation axis; the uppermost concentric variable diameter thin-film ring has an upper diameter smaller than the lower diameter of the gathering ring and partially overlaps with it.

[0018] Furthermore, as an optional solution, the annular enclosure structure can also be a cylindrical structure, wherein the upper diameter of the multiple concentric variable diameter thin sheet rings in the concentric variable diameter thin sheet ring group is smaller than the lower diameter, and the upper and lower openings of the multiple concentric variable diameter thin sheet rings have the same diameter.

[0019] Furthermore, as an alternative, the geometric configuration of the annular enclosure structure can also be a regular polyhedron, such as a trihedron or hexahedron, a tetrahedron or an octahedron.

[0020] Furthermore, the vertical blade includes a thin plate parallel to the rotation axis, with a hemispherical wind cup at the upper end of the thin plate. The edge of the hemispherical wind cup near the rotation axis is connected to the arc-shaped outer wall of the diffuser ring, and the outer arc of the hemispherical wind cup is consistent with the arc of the diffuser ring. The convex surface of the hemispherical wind cup is in the rotation direction of the annular shroud structure wind collector impeller. The lower part of the thin plate extends along the arrangement direction of the concentric variable diameter thin plate rings. The vertical blade is connected to the rotation axis via a connecting rod, and the rotation axis is connected to the generator body. The vertical blade connected to the rotation axis forms an annular shroud structure wind collector impeller, which facilitates the start-up of the impeller at low wind speeds.

[0021] Furthermore, it also includes a Venturi diffuser base, which is arranged at the lower part of the wind turbine of the annular enclosure structure, and its vertical cross-sectional profile is arc-shaped. A base air intake slit D1 is formed between the outer wall of the Venturi diffuser base and the lower opening of the lowest concentric variable diameter thin plate ring. The Venturi diffuser base and the first concentric variable diameter thin plate ring cooperate to draw the air below into the wind turbine of the annular enclosure structure and accelerate the air flow. The generator body is arranged inside the Venturi diffuser base, and there is a gap between the outer wall of the generator body and the inner wall of the Venturi diffuser base. The negative pressure suction in the wind turbine body forms a local accelerated airflow that carries away the heat generated by the generator body.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] 1. Efficiency Improvement: This application utilizes a ring-shaped enveloping structure for the wind turbine, where multiple concentric variable-diameter thin-plate rings are stacked on top of a diffuser ring and below it, forming a Venturi effect wind turbine structure for guiding airflow and enhancing wind speed through negative pressure suction. By accelerating the airflow and applying negative pressure suction, the air velocity is increased. When the diffuser ring increases the airflow velocity by 10%, the wind power can increase by 33.1%, far exceeding that of traditional wind turbines. The Venturi effect is a phenomenon where, when a confined fluid passes through a narrowed cross-sectional area, the velocity increases while the pressure decreases; the velocity is inversely proportional to the cross-sectional area. This phenomenon is based on Bernoulli's law, which states that an increase in fluid velocity is accompanied by a decrease in pressure.

[0024] 2. Low Wind Speed ​​Adaptability: The annular structure of the wind turbine's collector, also known as the Coanda Effect or wall attachment effect, allows for a reduction in the wind turbine's starting wind speed, enabling it to generate electricity efficiently even in light winds. This makes it suitable for low-wind-speed areas such as urban rooftops and mountainous regions. The Coanda Effect refers to the tendency of a fluid (water or air) to deviate from its original flow direction and flow along a convex surface.

[0025] 3. Optimized space utilization: By concentrating airflow and accelerating exhaust through the ring-shaped enveloping structure of the wind turbine, the requirement for wind turbine diameter can be reduced, and the dependence on tower height can be decreased, thereby saving material and installation costs.

[0026] 4. This application has low cost and high reliability, and is suitable for low wind speed areas such as cities and mountains, making it economical and worth promoting. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the vertical axis wind turbine of this utility model;

[0028] Figure 2 This is a schematic diagram of the cross-sectional structure of the vertical axis wind turbine of this utility model;

[0029] Figure 3 This is a top view schematic diagram of the vertical axis wind turbine of this utility model;

[0030] Figure 4 This is a front view schematic diagram of the annular enclosure structure with a uniform oblique cross-section profile according to Embodiment 1 of this utility model;

[0031] Figure 5 This is a schematic diagram of the cross-sectional structure of the annular enclosure structure with a uniform oblique cross-section in Embodiment 1 of this utility model;

[0032] Figure 6 This is a schematic diagram of the cross-sectional structure of the circular arc-shaped vertical cross-section ring-shaped enclosure structure of Embodiment 2 of this utility model;

[0033] Figure 7 This is a schematic cross-sectional view of the airfoil profile annular enclosure structure of Embodiment 2 of this utility model;

[0034] Figure 8 This is a front view schematic diagram of the wind turbine of the straight cylindrical annular enclosure structure in Embodiment 3 of this utility model.

[0035] Figure 9 This is a cross-sectional view of the wind turbine of the straight-cylinder annular enclosure structure in Embodiment 3 of this utility model.

[0036] Figure 10This is a schematic diagram of the cross-sectional profile of the straight cylindrical annular enclosure structure of Embodiment 3 of this utility model.

[0037] Figure 11 This is a schematic diagram of the cross-sectional structure of the straight cylindrical annular enclosure structure in Embodiment 3 of this utility model.

[0038] Figure 12 This is a schematic diagram of the cross-sectional structure of the straight-tube annular enclosure structure of Embodiment 3 of this utility model.

[0039] Figure 13 This is a three-dimensional structural diagram of the Venturi diffuser base component of Embodiment 4 of this utility model.

[0040] Figure 14 This is a top view schematic diagram of the straight-edged trihedral annular enclosure structure of Embodiment 5 of this utility model.

[0041] Figure 15 This is a top view schematic diagram of the straight-edged hexahedral annular enclosure structure of Embodiment 5 of this utility model.

[0042] Figure 16 This is a top view schematic diagram of the straight-sided tetrahedral annular enclosure structure of Embodiment 5 of this utility model.

[0043] Figure 17 This is a top view schematic diagram of the straight-edged octahedral annular enclosure structure of Embodiment 5 of this utility model.

[0044] In the diagram: 100, rotating shaft; 200, annular enclosure structure wind collector impeller; 300, generator body; 210, annular enclosure structure; 211, diffuser ring; 212, concentric variable diameter thin-plate ring assembly; 2121, guide ring; 2122, gathering ring; 2123, conical guide unit; 21231 (I-21231), first concentric variable diameter thin-plate ring; 21232 (I-21232), second concentric variable diameter thin-plate ring. 21233 (I-21233), Third concentric variable diameter thin-plate ring; 21234 (I-21234), Fourth concentric variable diameter thin-plate ring; I-21235, Fifth concentric variable diameter thin-plate ring; I-21236, Sixth concentric variable diameter thin-plate ring; 215, Output end; 220, Vertical blade; 221, Thin plate; 222, Hemispherical wind cup; 223, Connecting rod; 400, Venturi diffuser base. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] Example 1:

[0047] Please see Figures 1 to 3 The vertical axis wind turbine with an annular shroud structure wind collector rotor in this embodiment includes a rotating shaft 100 and an annular shroud structure wind collector rotor 200 and a generator body 300 connected to the rotating shaft 100.

[0048] Furthermore, attached Figure 2 This is a cross-sectional structural schematic diagram of Embodiment 1. The annular enclosure structure wind collector impeller 200 is used to drive the rotating shaft 100 to rotate around the axis of the rotating shaft in a vertical plane. The annular enclosure structure wind collector impeller 200 includes at least one vertical blade 220 and an annular enclosure structure 210 connected to the vertical blade 220.

[0049] Furthermore, the annular enclosure structure 210 includes a diffusion ring 211 at the top and a concentric variable diameter sheet ring group 212 below the diffusion ring 211. The multiple concentric variable diameter sheet rings of the concentric variable diameter sheet ring group 212 are stacked on top of each other to form a wind-collecting structure for guiding airflow and enhancing wind speed through negative pressure suction.

[0050] Furthermore, attached Figure 3 This is a top view of the structure of Embodiment 1, where the annular enclosure structure 210 receives ambient airflow in a 360° circumference.

[0051] Furthermore, attached Figure 5This is a schematic cross-sectional view of the annular enclosure structure in Embodiment 1. The vertical cross-section of the diffuser ring 211 is an arc-shaped structure. Through this special design, the diffuser ring 211 forms a gradually expanding and contracting pipe structure, creating an overall airflow channel. The upper opening of the diffuser ring 211 is the airflow output end 215, where the airflow is discharged at a departure wind speed V1. The narrowing of the pipe diameter in the middle accelerates the airflow. It is also designed so that the incoming airflow speed increases along the outer wall of the diffuser ring 211, creating a low-pressure area at the output end 215 of the annular enclosure structure. The Venturi effect formed by its arc-shaped structure guides the airflow acceleration, generating a negative pressure suction effect, making the departure wind speed V1 at the output end higher than the ambient wind speed V0, creating negative pressure and forming a "suction effect." The low-pressure area receives the departure wind speed V1 of the airflow flowing out from the output end 215 of the wind turbine of the annular enclosure structure, thereby improving the airflow. This design ensures that the wind speed at the impeller 200 of the annular enclosure structure is significantly higher than the ambient wind speed V0, thereby increasing power output and further driving the impeller rotation. The lower end of the diffuser ring 211 has an outward-expanding skirt. The lower concentric variable-diameter thin-plate ring assembly 212 is placed within it, effectively concentrating air and guiding the airflow inward to generate a suction effect.

[0052] Specifically, the annular enclosure structure 210 is configured to receive ambient airflow in a 360° lateral direction, and the staggered stacked structures guide the airflow into the inner side of the annular enclosure structure 210 to form an exit wind speed V1 of the airflow toward the diffuser ring output end 215.

[0053] Specifically, air intake slits are formed between the concentric variable-diameter thin-plate rings of the concentric variable-diameter thin-plate ring assembly 212, with the upper slit creating a negative pressure suction effect on the lower slit. Airflow is received through the air intake slits created by the staggered stacking of the previous and next concentric variable-diameter thin-plate rings; the air intake slits D2, D3, D4, D5, D6, and D7 formed between the stacked concentric variable-diameter thin-plate rings receive the ambient wind speed V0; the upper air intake slit creates a negative pressure on the lower air intake slit, forming a "suction effect." This causes the air between these channels to accelerate and enter the annular enclosure structure 210 at a higher speed. This "suction effect" also reduces the wind pressure, making it lower than the external atmospheric pressure. Therefore, under the influence of the pressure difference, the "suction effect" helps to draw in a larger volume of air from the surroundings into the annular enclosure structure's wind turbine 200, providing greater energy potential for the generator body 300. This design ensures that the wind speed at the wind turbine 200 of the annular enclosure structure is significantly higher than the ambient wind speed V0. Since the mechanical energy extracted by the generator from the wind is proportional to the cube of the wind speed, a substantial increase in power generation can be achieved by increasing the exit wind speed V1 and the incoming air volume.

[0054] Furthermore, attached Figure 4-5This is a schematic cross-sectional view of the annular enclosure structure in Example 1. The concentric variable diameter thin sheet rings of the concentric variable diameter thin sheet ring group 212 have a uniform oblique cross-sectional profile.

[0055] The following is a detailed discussion of each component:

[0056] Combined with appendix Figure 2-7 As shown: The annular enclosure structure 210 is designed as a cone-shaped funnel with the upper and lower sides facing each other, consisting of a set of concentric thin-plate rings arranged in an alternating stacked manner. The multiple concentric variable-diameter thin-plate rings of the concentric variable-diameter thin-plate ring group 212 are arranged in an alternating stacked manner, including a flow guide ring 2121, a gathering ring 2122, and a cone-shaped flow guide unit 2123 composed of multiple concentric variable-diameter thin-plate rings 21231, 21232, 21233, and 21234 from top to bottom. The number of concentric variable-diameter thin-plate rings is not limited and can be arranged in more or fewer ways.

[0057] Specifically, the guide ring 2121 is a concentric variable diameter thin ring that is narrow at the top and wide at the bottom. The upper opening of the guide ring 2121 is close to the rotating shaft 100 while the lower opening is far away from the rotating shaft 100. Its upper opening is embedded in the inner side of the skirt of the diffuser ring 211, and its lower opening is flush with the edge of the skirt of the diffuser ring 211 in the vertical direction to reduce the loss of airflow.

[0058] Specifically, the gathering ring 2122 consists of two parts: the upper part is a concentric variable diameter thin sheet ring that is narrower at the top and wider at the bottom, and the lower part is a concentric variable diameter thin sheet ring that is wider at the top and narrower at the bottom. The connection between the two parts forms an obtuse angle bend, and its vertical cross-section is an obtuse angle zigzag shape.

[0059] Specifically, the concentric variable-diameter thin-plate rings of the conical flow guiding unit 2123 are arranged in a staggered, progressively larger manner from bottom to top. Each concentric variable-diameter thin-plate ring has an upper opening and a lower opening, wherein the diameter of the upper opening is larger than the diameter of the lower opening, the lower opening is closer to the rotation axis 100, and the upper opening is farther away from the rotation axis 100. The uppermost concentric variable-diameter thin-plate ring has an upper opening diameter smaller than the lower opening diameter of the gathering ring 2122 and partially overlaps with the lower part of the gathering ring 2122. The upper opening diameter of each ring is larger than the lower opening diameter and the lower opening is adjacent to the rotation axis 100; the uppermost concentric variable-diameter thin-plate ring has an upper opening diameter smaller than the lower opening diameter of the gathering ring 2122 and partially overlaps with it.

[0060] Furthermore, the annular shroud structure wind turbine 200 also includes vertical blades 220 and a thin plate 221 parallel to the rotating shaft 100. A hemispherical wind cup 222 is provided at the upper end of the thin plate 221. The edge of the hemispherical wind cup 222 near the rotating shaft 100 is connected to the arc-shaped outer wall of the diffuser ring 211, and the outer arc of the hemispherical wind cup 222 is consistent with the arc of the diffuser ring 211. The convex surface of the hemispherical wind cup 222 is in the rotation direction of the annular shroud structure wind turbine 200. The lower part of the thin plate 221 extends along the arrangement direction of the concentric variable diameter thin plate ring group 212. The vertical blades 220 are connected to the rotating shaft 100 through a connecting rod 223. The rotating shaft 100 is connected to the generator body 300.

[0061] Example 2:

[0062] According to another embodiment of the present invention, based on embodiment 1, and in conjunction with the appendix... Figure 6-7 As shown: the flow guide ring 2121, the gathering ring 2122, the concentric variable diameter thin sheet rings 21231, 21232, 21233, and 21234 in the annular enclosure structure 210 can also have a circular arc vertical cross section profile, or be formed according to the airfoil profile.

[0063] Specifically, the configuration is adapted to utilize the boundary layer effect, where air adheres to an arc-shaped vertical cross-section profile. A boundary layer is created by shaping the surface according to the arc-shaped vertical cross-section profile or airfoil profile. Due to viscosity, the air velocity gradually increases from zero at the wall to a thin layer region of mainstream velocity. The thickness of the boundary layer is typically defined by the point where the velocity reaches 99% of the mainstream velocity. The boundary layer effect describes the significant changes in physical quantities such as fluid velocity, pressure, and temperature within this thin layer, and the impact of these changes on overall flow characteristics. By optimizing the arc-shaped vertical cross-section profile of the annular enclosure structure 210, or by shaping and roughening the surface according to the airfoil profile, the thickness and separation point of the boundary layer can be controlled, ultimately improving the power output of the annular enclosure structure's wind turbine 200. This effect further drives the rotation of the annular enclosure structure's wind turbine 200. The bending angle and stacking arrangement of each concentric variable-diameter thin-plate ring in the annular enclosure structure 210 significantly reduce air loss from the wind turbine while accelerating and focusing the wind force. Therefore, this invention can effectively increase the wind speed passing through the annular shroud structure wind collector rotor 200, which in turn can significantly increase the output power. This improves wind energy utilization, and the structural design effectively increases the power generation efficiency of the vertical axis wind turbine.

[0064] Example 3:

[0065] Combined with appendix Figure 8-12As shown: According to another embodiment of this utility model, based on embodiment 1, the annular enclosure structure 210 can also be a cylindrical structure. The concentric variable diameter thin-plate ring group 212 consists of multiple concentric variable diameter thin-plate rings I-21231, I-21232, I-21233, I-21234, I-21235, and I-21236, each with an upper diameter smaller than its lower diameter. The upper and lower openings of the multiple concentric variable diameter thin-plate rings have the same diameter. The number of concentric variable diameter thin-plate rings is not limited and can be arranged in more or fewer ways.

[0066] Example 4:

[0067] Combined with appendix Figure 2 and Figure 13 As shown: According to another embodiment of the present invention, based on embodiment 1, a Venturi diffuser base 400 is further provided, which is arranged at the lower part of the wind turbine 200 of the annular enclosure structure wind collector, and its vertical cross-sectional profile is arc-shaped; wherein a base air intake slit D1 is formed between the outer wall of the Venturi diffuser base 400 and the lower opening of the first concentric variable diameter thin ring; the Venturi diffuser base 400 and the first variable diameter thin ring 21231 will cooperate effectively to draw the air below into the wind collector and accelerate the airflow; the generator 300 is arranged inside the Venturi diffuser base 400, and a gap is left between the outer wall of the generator 300 and the inner wall of the Venturi diffuser base 400. The "suction effect" forms a local accelerated airflow that carries away the heat generated by the generator. This structural design effectively increases the service life and power generation efficiency of the generator.

[0068] Example 5:

[0069] Combined with appendix Figure 14-17 As shown: According to another embodiment of the present invention, based on Embodiment 1, the geometric configuration of the annular enclosure structure 210 can also be a regular polyhedron; for example, a trihedron or hexahedron, a tetrahedron or an octahedron. The straight-edged annular enclosure structure significantly reduces material and production costs.

[0070] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0072] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical axis wind turbine with a wind collector and rotor featuring an annular enclosure structure, characterized in that: The system includes a rotating shaft (100), an annular enclosure structure wind collector impeller (200) connected to the rotating shaft (100), and a generator body (300). The annular enclosure structure wind collector impeller (200) is used to drive the rotating shaft (100) to rotate around the axis of the rotating shaft in a vertical plane. The annular enclosure structure wind collector impeller (200) includes at least one vertical blade (220) and an annular enclosure structure (210) connected to the vertical blade (220). The annular enclosure structure (210) includes a diffuser ring (211) at the top and a concentric variable diameter thin sheet ring group (212) below the diffuser ring (211). The multiple concentric variable diameter thin sheet rings of the concentric variable diameter thin sheet ring group (212) are stacked on each other to form a wind collector structure for guiding airflow and enhancing wind speed through negative pressure suction.

2. A vertical axis wind turbine generator with an annular shroud structure for collecting wind and a wind turbine rotor according to claim 1, characterized in that: The annular enclosure structure (210) receives ambient airflow in a 360° circumference and guides the airflow to the inside and accelerates the output through concentric variable diameter thin-plate rings stacked together. The vertical cross-section of the diffuser ring (211) is an arc-shaped structure, forming a gradually expanding and contracting airflow channel. The central pipe diameter contraction accelerates the airflow. The upper opening of the diffuser ring (211) is the airflow output end (215), where the airflow is discharged at the departure wind speed V1. The Venturi effect formed by its arc-shaped structure guides the airflow to accelerate and generate a negative pressure suction effect, so that the departure wind speed V1 at the output end is higher than the ambient wind speed V0. The lower end of the diffuser ring (211) is provided with an outward-expanding skirt.

3. A vertical axis wind turbine with a wind collector and a wind turbine with an annular enclosure structure as described in claim 2, characterized in that: The concentric variable diameter thin-plate rings of the concentric variable diameter thin-plate ring group (212) form an air intake slit, and the upper slit generates a negative pressure suction effect on the lower slit.

4. A vertical axis wind turbine with a wind collector and a wind turbine with an annular enclosure structure as described in claim 3, characterized in that: The concentric variable diameter thin sheet rings of the concentric variable diameter thin sheet ring assembly (212) have a uniform oblique cross section profile, a circular arc vertical cross section profile, or an airfoil profile.

5. A vertical axis wind turbine with a wind collector and a wind turbine with an annular enclosure structure as described in claim 4, characterized in that: The concentric variable diameter thin-plate ring group (212) is arranged in an alternating stacked manner, including a top-down flow guide ring (2121), a gathering ring (2122), and a conical flow guide unit (2123) composed of multiple concentric variable diameter thin-plate rings. The guide ring (2121) is a concentric variable diameter thin sheet ring that is narrow at the top and wide at the bottom. The upper opening of the guide ring (2121) is close to the rotating shaft (100) while the lower opening is far away from the rotating shaft (100). Its upper opening is embedded in the inner side of the skirt of the diffuser ring (211), and its lower opening is flush with the edge side of the skirt of the diffuser ring (211) in the vertical direction. The gathering ring (2122) consists of upper and lower parts. Composition: The upper part is a concentric variable diameter thin sheet ring that is narrower at the top and wider at the bottom, and the lower part is a concentric variable diameter thin sheet ring that is wider at the top and narrower at the bottom. The connection between the two parts forms an obtuse angle bend, and its vertical cross-section is an obtuse angle zigzag shape. The concentric variable diameter thin-film rings (21231, 21232, 21233, 21234) of the conical flow guiding unit (2123) are stacked in a progressively larger manner from bottom to top. The upper diameter of each ring is larger than the lower diameter and the lower opening is adjacent to the rotation axis. The uppermost concentric variable diameter thin-film ring has a smaller upper diameter than the lower diameter of the gathering ring (2122) and partially overlaps with it.

6. A vertical axis wind turbine with a wind collector and a wind turbine with an annular enclosure structure as described in claim 4, characterized in that: The annular enclosure structure (210) is a straight cylindrical structure. The concentric variable diameter thin sheet ring group (212) consists of multiple concentric variable diameter thin sheet rings (I-21231, I-21232, I-21233, I-21234, I-21235, I-21236) with an upper diameter smaller than a lower diameter. The upper and lower openings of the multiple concentric variable diameter thin sheet rings have the same diameter.

7. A vertical axis wind turbine with an annular shroud structure for collecting wind and a wind turbine rotor according to claim 5 or 6, characterized in that: The geometric configuration of the annular enclosure structure (210) is a regular polyhedron.

8. A vertical axis wind turbine with an annular shroud structure for collecting wind turbine rotor according to any one of claims 1-6, characterized in that: The vertical blade (220) includes a thin plate (221) parallel to the rotating shaft (100). A hemispherical wind cup (222) is provided at the upper end of the thin plate (221). The edge of the hemispherical wind cup (222) near the rotating shaft (100) is connected to the arc-shaped outer wall of the diffuser ring (211), and the outer arc of the hemispherical wind cup (222) is consistent with the arc of the diffuser ring (211). The convex surface of the hemispherical wind cup (222) is in the direction of rotation of the wind turbine (200) of the annular enclosure structure. The lower part of the thin plate (221) extends along the arrangement direction of the thin rings of the concentric variable diameter thin plate ring group. The vertical blade (220) is connected to the rotating shaft (100) through a connecting rod (223). The rotating shaft (100) is connected to the generator body (300).

9. A vertical axis wind turbine with an annular shroud structure for collecting wind turbine rotor according to any one of claims 1-6, characterized in that: It also includes a Venturi diffuser base (400), which is arranged at the lower part of the annular enclosure structure wind collector impeller (200) and has a vertical cross-sectional profile of arc shape. A base air intake slit D1 is formed between the outer wall of the Venturi diffuser base (400) and the lower opening of the lowest concentric variable diameter thin ring. The Venturi diffuser base (400) and the first variable diameter thin ring (21231) cooperate to draw the air below into the annular enclosure structure wind collector impeller (200) and accelerate the air flow. The generator body (300) is arranged inside the Venturi diffuser base (400). There is a gap between the outer wall of the generator body (300) and the inner wall of the Venturi diffuser base (400). The negative pressure suction forms a local accelerated airflow that carries away the heat emitted by the generator body (300).

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