Wind power generation device and wind power generation system

Abstract

The invention discloses a wind power generation device and system, and the device comprises a main bag body which extends in the front-back direction, and the peripheral surface of the main bag body is a rotary surface; the annular wing is arranged on the radial outer side of the main bag body in a sleeving mode, the annular wing and the main bag body are spaced, and an airflow channel is formed between the inner wall of the annular wing and the outer wall of the main bag body; the airflow channel is divided into a plurality of air channels through components, the air channels are arranged in the circumferential direction of the main bag body, and fan blades are arranged in at least part of the air channels. By means of the coaxial layout of the main bag body and the annular wing and the combination of division of an airflow channel by a component, efficient capture and energy conversion of wind energy are achieved. Compared with a traditional floating power generation device, the wind sweeping area of the fan blades can be remarkably reduced under the same power generation power, the economical efficiency of the wind power generation device is improved, and the technical feasibility of stepping towards a higher altitude and a higher wind energy density area is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and more specifically, to a wind power generation device and a wind power generation system. Background Art

[0002] With the development of renewable energy technologies, wind power has gained widespread application as a clean energy technology. While wind power boasts advantages such as cleanliness, environmental benefits, and renewable nature, it also suffers from limitations such as unstable low-altitude wind energy and low wind density, which severely restrict its further development. Existing designs require increasingly larger blade swept areas to maximize the capture of low-speed wind energy near the ground. This places higher demands on manufacturing, transportation, and land use. Summary of the Invention

[0003] In view of the above problems, one object of the present invention is to provide a wind power generation device.

[0004] Another object of the present invention is to provide a wind power generation system including a wind power generation device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, there is provided a wind power generation device, comprising:

[0007] a main bladder body, the main bladder body extending in the front-to-back direction, the outer peripheral surface of which is a rotational surface;

[0008] an annular wing, the annular wing being sheathed radially outside the main bladder body and spaced apart from the main bladder body, with an airflow channel formed between an inner wall of the annular wing and an outer wall of the main bladder body; and

[0009] The air flow channel is divided into a plurality of air ducts by components. The plurality of air ducts are arranged along the circumference of the main bag body. At least some of the plurality of air ducts are provided with fan blades.

[0010] In addition, an optional solution is that the component is a diaphragm, which is arranged in the air flow channel, with one end connected to the inner wall of the annular wing and the other end connected to the outer wall of the main bag body.

[0011] In addition, an optional solution is that the component is a raised structure, which includes a first raised structure located on the inner wall of the annular wing and protruding toward the main bladder body, and a second raised structure located on the outer wall of the main bladder body and protruding toward the annular wing.

[0012] In addition, an optional solution is that both side surfaces of the diaphragm are inward-curved smooth surfaces, and the front and rear edges of the diaphragm are inward-curved smooth curves;

[0013] The projection of the diaphragm in a plane perpendicular to the axis of the main balloon is an hourglass structure.

[0014] In addition, an optional solution is that the generatrix of the outer peripheral surface of the first protrusion is a part of an ellipse or a circle;

[0015] A generatrix of an outer peripheral surface of the second protrusion is a portion of an ellipse or a circle.

[0016] In addition, an optional solution is that the projection of the air duct along a plane perpendicular to the axis of the air flow channel is a long strip structure and / or a nearly circular structure.

[0017] In addition, an optional solution is that the plurality of air ducts are evenly arranged along the circumference of the air flow channel and are centrally symmetrically arranged about the center of the air flow channel.

[0018] In addition, an optional solution is that the main bag body is divided into a first part and a second part along the front-to-back direction;

[0019] The main sac is an integrated structure, and the junction of the first part and the second part is the position where the diameter of the main sac is the largest;

[0020] The annular wing sleeve is located radially outside the second part, the front end of the annular wing is located behind the front end of the second part, and the rear end of the annular wing is located in front of the rear end of the second part.

[0021] In addition, an optional solution is that the front end of the air flow channel is an air inlet, and the rear end is an air outlet. The air flow channel is divided into a gradually narrowing section, a throat and a gradually expanding section from the air inlet to the air outlet according to the ring width, and the ring width of the air flow channel inlet is smaller than the ring width of the air flow channel outlet.

[0022] In addition, an optional solution is that the inner circumferential surface of the annular wing is a revolution-shaped surface, including a first surface and a second surface, and the junction of the first surface and the second surface is the minimum point of the inner diameter of the annular wing, corresponding to the throat;

[0023] The inner diameter of the first surface gradually decreases from front to back, forming a tapered section between the first surface and the corresponding outer wall of the main bladder;

[0024] The inner diameter of the second surface gradually increases from front to back, and forms a gradually expanding section between the second surface and the corresponding outer wall of the main bladder.

[0025] In addition, an optional solution is to further include a support structure, and the fan blades are arranged in the air flow channel through the support structure;

[0026] The wind blade includes a blade and a generator driven by the rotation of the blade;

[0027] The blades are located at the throat.

[0028] In addition, an optional solution is that the air duct includes a portion corresponding to the throat in the front-to-back direction, the inner diameter of the portion is equal to the ring width at the throat, and the inner diameter of the portion is 1-1.2 times the outer diameter of the fan blade.

[0029] In addition, an optional solution is to further include four tail fins arranged in an X-shaped distribution structure on the outer wall of the annular wing, and the tail fins are located at the trailing edge of the annular wing;

[0030] The tail wing is a trapezoidal swept wing.

[0031] In addition, an optional solution is that the air duct includes a first air duct equipped with fan blades and a second air duct not equipped with fan blades;

[0032] The air flow channel is divided into 3-24 first air channels by components, and each first air channel is equipped with at least one set of fan blades.

[0033] In addition, an optional solution is that the multiple groups of fan blades located in the air flow channel include fan blades with a clockwise rotation direction and fan blades with a counterclockwise rotation direction.

[0034] According to one aspect of the present invention, there is provided a wind power generation system, comprising:

[0035] Ground facilities;

[0036] Wind power generation equipment;

[0037] A mooring rope, one end of which is connected to the wind turbine generator, and the other end of which is connected to a ground facility.

[0038] The beneficial effects of the present invention are as follows:

[0039] To address the technical issues existing in the prior art, the present invention provides a wind turbine and wind turbine system. Compared to ducted bladders, the wind turbine of the present invention, due to its main bladder layout similar to that of traditional airships, achieves a more favorable aspect ratio and provides space for the placement of auxiliary airbags. During operation, the auxiliary airbags are connected to the outside atmosphere via fans and valves. During the ascent of the floating platform from the ground to high altitudes, the pressure is adjusted to maintain the floating platform's shape, thus enabling the platform to operate at altitudes of up to 1,000 meters. Compared to ducted bladders, which cannot efficiently deploy auxiliary airbags, the solution described in the present invention has the technical feasibility of advancing to higher altitudes and regions with higher wind energy density.

[0040] The main bladder and the annular wings together form a convergent and expandable annular airflow channel, which comprehensively utilizes the duct effect and distributed layout characteristics to concentrate wind energy and then absorb it by multiple wind blades, breaking the whole into parts. Under the same power generation power, the size requirement of the total swept area of ​​the wind blades is reduced, reducing the engineering difficulty and the overall volume of the wind power generation device.

[0041] The wind turbine utilizes a distributed wind power generation layout. Compared to the large blades used in existing technologies, the annular airflow channel formed by the main bladder and annular wings allows for the use of multiple smaller blades to achieve the same power output. This effectively reduces the manufacturing, transportation, and on-site installation difficulties associated with large blades. Furthermore, the capture of airflow energy by multiple blades offers advantages such as reduced blade diameter, increased blade speed, and reduced blade torque, thus preventing the wind turbine from rolling or even tipping over.

[0042] The airflow channel is divided into multiple ducts by components, and the projection of the duct in a plane perpendicular to the axis of the airflow channel is an elongated or nearly circular structure. This fills the area between the blades, further concentrating high-energy airflow within the duct where the blades are located, reducing meaningless air leakage and improving power generation efficiency. This can significantly reduce the swept area of ​​the blades while maintaining the same power generation capacity, improving the economic efficiency of the wind turbine.

[0043] In summary, the wind power generation device and wind power generation system provided by the embodiments of the present invention have three major advantages at the aerodynamic level: capturing high-altitude high-energy-density wind energy; using a ducted layout to further concentrate wind energy to a smaller throat area to improve power generation efficiency; and using a distributed layout to convert large wind blades into multiple small wind blades, thereby simplifying engineering difficulty and reducing aerodynamic torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] Figure 1 A schematic structural diagram of a high-altitude wind power generation device provided by an embodiment of the present invention is shown.

[0046] Figure 2 A front view of the wind turbine generator provided in Example 1 is shown.

[0047] Figure 3 A front view of a wind turbine generator provided in Example 2 is shown.

[0048] Figure 4 A front view of a wind turbine generator provided in Example 3 is shown.

[0049] Figure 5 A front view of a wind turbine generator provided in Example 4 is shown.

[0050] Figure 6 A front view of a wind turbine generator provided in Example 5 is shown.

[0051] Figure 7 A front view of a wind turbine generator provided in Example 6 is shown.

[0052] Figure 8 A sectional view of a wind power generation device provided by an embodiment of the present application is shown.

[0053] Figure 9 A side view of a wind power generation device provided by an embodiment of the present application is shown.

[0054] Figure 10 A sectional view of a wind power generation device provided by an embodiment of the present application is shown. Figure 2 An enlarged view of A in FIG. 6.

[0055] Figure 11 A simulation speed nephogram of a sectional view of a wind power generation device provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0056] The present application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of interpretation of the present application and are not limiting of the present application. It should also be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings and not all the structures.

[0057] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or can be integrated; can be directly connected, or can be connected through an intermediate medium gap; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0059] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the purpose of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0060] Compared with ground wind energy and low-altitude wind energy, high-altitude wind energy is not affected by the boundary layer generated on the ground, and the wind energy density has a clear macro trend of increasing and stabilizing, which is a high-quality wind energy resource that has not been developed.

[0061] The main representative of existing low-altitude wind energy development is the ducted floating power generation scheme proposed by the United States. This scheme adopts a single-channel layout at the aerodynamic level, with wind-driven blades arranged in the center of the channel. This scheme is an effective aerodynamic configuration in the field of low-altitude, small-capacity wind power generation. However, as wind power generation devices develop towards higher altitudes and higher powers, they encounter the following technical obstacles:

[0062] 1. The main component of this proposal is a helium-filled aerostat envelope. This annular structure features a central channel for the wind blades. Compared to a sphere, the aerostat envelope has a lower aspect ratio. For the same helium or hydrogen volume, the envelope's surface area and weight are significantly increased, making it difficult to carry heavier wind turbine loads.

[0063] 2. The internal space of the aerostat is irregular, making it difficult to arrange internal regulating equipment such as the auxiliary airbag. As the power generation height increases, the air pressure regulation capability of this solution is insufficient when faced with large pressure differences from the ground to high altitudes.

[0064] 3. As the power generation capacity increases, the diameter of the blades will also increase as needed. However, for the blades, the linear speed of the blade tip rotation is usually limited to a specific high aerodynamic efficiency range, such as 0.3-0.6Ma (Mach number), which means that the larger the diameter of the blade, the lower the rotation speed. At the same time, due to the increase in wind energy capture power, the torque generated by large-diameter blades when capturing wind energy will be very large, and may even cause the entire power generation device to experience severe disturbances in the roll attitude or even overturn. On the other hand, high torque also poses severe challenges to the lightweight gearbox, that is, the generator design, which restricts the development of high-altitude wind power generation devices.

[0065] In view of the defects of the prior art, the present invention provides a wind power generation device, which is combined with Figure 1-11 As shown, the wind power generation device includes a main bag body 1, annular wings 2 and wind blades 3.

[0066] The main bladder 1 extends in the front-to-back direction, and its outer peripheral surface is a surface of revolution. A surface of revolution is a surface formed by rotating a generatrix (straight or curved line) around a fixed axis, expanding a two-dimensional contour into a three-dimensional curved surface through rotation.

[0067] The annular wing 2 is sleeved on the radial outside of the main bag body 1 and is spaced apart from the main bag body 1. In the spaced area between the annular wing 2 and the radial inner wall of the annular wing 2 and the corresponding radial outer wall of the main bag body 1, an air flow channel 4 is formed, and the fan blade 3 is arranged in the air flow channel 4.

[0068] The air flow channel 4 is divided into a plurality of air ducts 40 by components. The plurality of air ducts are arranged along the circumference of the main bag body 1 . At least some of the plurality of air ducts 40 are provided with fan blades 3 .

[0069] The air flow channel 4 is an annular structure, circumferentially surrounding the radial outer side of the main bag body 1 and the radial inner side of the annular wing 2 .

[0070] In this application, the front-to-back direction is consistent with the axial direction of the wind turbine. After the wind turbine provided by the embodiment of the present invention is released to a high altitude, when wind is generated in the high altitude, the airflow will flow along its axial direction when passing through the wind turbine, or the wind turbine will adjust its axial direction to be consistent with the wind direction through active adjustment. Among them, the front end of the wind turbine is the windward side, that is, the airflow blows through the wind turbine from front to back. The annular wing 2 not only constitutes the duct wall of the wind turbine, but also is consistent with the concept of "annular wing" in the aircraft, and can regulate the high-altitude aerodynamic lift of the wind turbine, and has the effect of generating aerodynamic lift to pull the height of the wind turbine. The annular wing 2 is filled with gas, for example, it can be filled with air or other gases. When filled with hydrogen or helium, it can generate considerable buoyancy.

[0071] In a specific embodiment, the component divides the airflow channel 4 into a plurality of air ducts based on airflow characteristics and / or by physical separation. During actual design and production, the airflow channel can be divided based on airflow characteristics, physical separation, or a combination of airflow characteristics and physical separation, depending on indicators such as wind resistance, the height of the wind turbine generator set released into the air, and required power generation.

[0072] Segmenting airflow channels based on airflow characteristics specifically refers to dividing airflow channels based on airflow characteristics such as velocity, pressure, temperature, and direction. For example, by setting flow-guiding elements (such as curvature changes and angle turns) within the airflow channel, the airflow is diverted and different flow zones are formed within the channel, thereby dividing the airflow channel into several ducts.

[0073] The use of physical separation to divide the airflow channel specifically refers to the use of physical components in the airflow channel, such as partitions, diaphragms, guide vanes, etc., to rigidly separate a single airflow channel into multiple independent air ducts, and each air duct is isolated by a physical boundary.

[0074] In a specific embodiment, the component is a diaphragm 5, such as Figure 2 As shown, the diaphragm 5 is arranged in the air flow channel 4, with one end connected to the radial inner wall of the annular wing 2 and the other end connected to the radial outer wall of the main bag body 1, dividing the air flow channel 4 into several air ducts 40 by physical separation.

[0075] In a specific embodiment, Figure 2 as well as Figure 10As shown, the left and right sides of the diaphragm 5 are inwardly recessed smooth curves, and the front and rear edges of the diaphragm 5 are inwardly recessed smooth curves, which can reduce the aerodynamic resistance of the diaphragm 5, so that the airflow can flow smoothly into the air duct 40 when passing through the diaphragm 5, avoiding airflow separation and reducing aerodynamic loss.

[0076] In this embodiment, as shown in the drawings, Figure 10 The projection of the diaphragm 5 in the plane perpendicular to the axis of the main capsule 1 is in the shape of an hourglass, and the width a of the connection end of the diaphragm 5 and the annular wing 2 is greater than the width b of the connection end of the diaphragm 5 and the main capsule 1. By the diaphragm 5, the projection of the air duct 40 in the plane perpendicular to the axis of the main capsule 1 can be adjusted to a long strip structure or a nearly circular structure, which is closer to the swept area of the fan blade 3, so that the high-energy airflow can be further gathered into the air duct 40 where the fan blade 3 is located, reducing unnecessary leakage of airflow and improving power generation efficiency.

[0077] In a specific embodiment, the structure is a protrusion structure 6, as shown in the drawings, Figure 3 The protrusion structure 6 is a non-connected barrier structure, and the protrusion structure 6 includes a first protrusion 61 located on the radial inner wall of the annular wing 2 and protruding towards the main capsule 1, and a second protrusion 62 located on the radial outer wall of the main capsule 1 corresponding to the annular wing 2 and protruding towards the annular wing 2. The oppositely arranged first protrusion 61 and second protrusion 62 form a group of protrusion structures 6, and multiple groups of protrusion structures 6 are arranged in the airflow passage 4 to divide the airflow passage 4 into several air ducts according to the airflow characteristics.

[0078] The first protrusion 61 and the second protrusion 62 are not connected at one end close to each other, and the airflow is guided into the air duct 40 located on the left and right sides of the protrusion structure through the outer peripheral surface of the first protrusion 61 and the second protrusion 62.

[0079] In a specific embodiment, as shown in the drawings, Figure 3 The first protrusion 61 and the second protrusion 62 are both designed with low-resistance aerodynamic shape, the outer peripheral surface of the first protrusion 61 is a curved surface, and the generatrix of the outer peripheral surface of the first protrusion 61 is an ellipse or a circle or a part of a wing type such as Naca0012. The outer peripheral surface of the second protrusion 62 is a curved surface, and the generatrix of the outer peripheral surface of the second protrusion 62 is an ellipse or a circle or a part of a wing type such as Naca0012. The structure of the first protrusion 61 and the second protrusion 62 can guide the airflow to branch by changing the curvature of the surface, so that the airflow flows around the first protrusion 61 and the second protrusion 62, thereby forming different flow regions in the airflow passage and dividing the airflow passage into several air ducts. In addition, it can also reduce the aerodynamic resistance, so that the airflow can flow smoothly into the air duct 40, avoiding airflow separation and reducing aerodynamic loss.

[0080] Specifically, the first protrusion 61 is formed on the annular wing 2 and is naturally expanded under the action of internal pressure. The second protrusion 62 is formed on the main bladder body 1 and is naturally expanded under the action of internal pressure. The protrusion structure 6 divides the airflow channel 4, which can significantly reduce the engineering difficulty.

[0081] In a specific embodiment, Figure 2-7 As shown, the projection of the air duct 40 along the plane perpendicular to the axis of the air flow channel 4 is an elongated structure and / or a nearly circular structure. Generally, if the number of blades 3 in the air duct 40 is one group, the projection of the air duct 40 along the plane perpendicular to the axis of the air flow channel 4 is a nearly circular structure; if the number of blades 3 in the air duct 40 is two or more groups, the projection of the air duct 40 along the plane perpendicular to the axis of the air flow channel 4 is an elongated structure; if the number of blades 3 in different air ducts 40 is different, the projection of the air duct 40 along the plane perpendicular to the axis of the air flow channel 4 is a nearly circular structure, and the projection of the air duct 40 along the plane perpendicular to the axis of the air flow channel 4 is an elongated structure when one group of blades 3 is configured. It should be noted that the number of air ducts 40 and the total number of blades in the wind turbine generator need to be designed based on conditions such as the wind resistance, the required power generation, and the height at which the wind turbine generator is released into the air.

[0082] Because the swept area of ​​the blades 3 is circular, it's obvious that the blades 3 can't achieve efficient utilization of wind energy within the annular airflow channel 4. By using components to divide the airflow channel 4 into multiple ducts 40, and making the projection of each duct 40 in a plane perpendicular to the axis of the airflow channel 4 an elongated or nearly circular structure, the area between the blades 3 is filled, further concentrating high-energy airflow within the ducts 40 where the blades 3 are located. This reduces unnecessary airflow leakage and improves power generation efficiency. This significantly reduces the swept area of ​​the blades while maintaining the same power generation output, improving the economic efficiency of the wind turbine.

[0083] In one embodiment, a plurality of air ducts 40 are evenly arranged along the circumference of the airflow channel 4 and are centrally symmetrically arranged about the center of the airflow channel 4, so that the force of the airflow on the wind turbine as a whole in all directions is more uniform, which helps to maintain the stability of the flight attitude.

[0084] In another embodiment, the air ducts 40 are arranged unevenly along the circumference of the air flow channel 4, and are centrally symmetrical about the center of the air flow channel 4. The air ducts 40 are centrally symmetrical about the center of the air flow channel. Even if the air ducts are arranged unevenly, they can be centrally symmetrical about the center of the air flow channel 4 to a certain extent.

[0085] In one embodiment, the air duct 40 includes a first air duct 401 provided with fan blades 3 and a second air duct 402 not provided with fan blades 3 . At least one group of fan blades 3 is provided in the first air duct 401 .

[0086] Because the air duct 40 is defined by a component within the airflow channel 4 and the annular width of the airflow channel 4 is fixed, the inner diameter of the air duct 40 is limited by the annular width of the airflow channel 4 and the outer diameter of the blades 3. When the total number of blades 3 within the airflow channel 4 is small, simply dividing the airflow channel 4 with components would increase the wind resistance experienced by the wind turbine. Therefore, a method is employed to reduce resistance by dividing the airflow channel 40 into a first air duct 401, where blades 3 are located, and a second air duct, where blades 3 are not located. Alternatively, a flow guide 8 is provided on the front surface of the component to further guide airflow into the air duct 40.

[0087] In one embodiment, the air flow channel 4 is divided into 3-24 first air channels 401 by components, and at least one group of fan blades 3 is disposed in each first air channel 401 .

[0088] The following describes the distribution of the air duct 40 and the fan blades 3 in the air flow channel 4 through several specific examples.

[0089] Example 1

[0090] like Figure 2 As shown, 12 groups of fan blades 3 are arranged in the air flow channel 4 , and the air flow channel 4 is divided into 12 air ducts 40 by the diaphragm 5 , and each air duct 40 is arranged with a group of fan blades 3 .

[0091] The projection of the air duct 40 in a plane perpendicular to the axis of the air flow channel 4 is a nearly circular structure.

[0092] Example 2

[0093] like Figure 3 As shown, 12 groups of fan blades 3 are arranged in the air flow channel 4 , and the air flow channel 4 is divided into 12 air ducts 40 by the raised structure 6 , and each air duct 40 is arranged in a group of fan blades 3 .

[0094] The projection of the air duct 40 in a plane perpendicular to the axis of the air flow channel 4 is a nearly circular structure.

[0095] Example 3

[0096] like Figure 4 As shown, six groups of fan blades 3 are arranged in the air flow channel 4 , and the air flow channel 4 is divided into six air channels 40 by the diaphragm 5 , and each air channel 40 is arranged with a group of fan blades 3 .

[0097] The portion between two adjacent air ducts 40 is separated by a diaphragm 5 , and a flow guide 8 is provided on the surface of the diaphragm 5 to allow more air to enter the air duct 40 .

[0098] The projection of the air duct 40 in a plane perpendicular to the axis of the air flow channel 4 is a nearly circular structure.

[0099] Example 4

[0100] like Figure 5 As shown, 8 groups of fan blades 3 are arranged in the air flow channel 4, and the air flow channel 4 is divided into 8 first air channels 401 and 8 second air channels 402 by the diaphragm 5. The first air channels 401 and the second air channels 402 are alternately arranged along the circumference of the air flow channel 4 and separated by the diaphragm 5.

[0101] A set of fan blades 3 is disposed in each first air duct 401 , while no fan blades 3 are disposed in the second air duct 402 .

[0102] The projection of the first air duct 401 in the plane perpendicular to the axis of the air flow channel 4 is a nearly circular structure, the projection of the second air duct 402 in the plane perpendicular to the axis of the air flow channel 4 is a nearly circular structure, and the projection area of ​​the second air duct 402 in the plane perpendicular to the axis of the air flow channel 4 is smaller than the projection area of ​​the first air duct 401 in the plane perpendicular to the axis of the air flow channel 4.

[0103] Example 5

[0104] like Figure 6 As shown, 12 groups of fan blades 3 are arranged in the air flow channel 4 , and the air flow channel 4 is divided into 6 air channels 40 by the diaphragm 5 , and two groups of fan blades 3 are arranged in each air channel 40 .

[0105] A raised structure 6 is provided in each air duct 40 , which is divided into a first air duct portion 40A and a second air duct portion 40B by the raised structure 6 . Two groups of fan blades 3 are respectively located in the first air duct portion 40A and the second air duct portion 40B.

[0106] The projection of the air duct 40 in a plane perpendicular to the axis of the air flow channel 4 is a long strip structure.

[0107] Example 6

[0108] like Figure 7 As shown, 12 groups of fan blades 3 are arranged in the air flow channel, and the air flow channel 4 is divided into 8 air channels 40 by the diaphragm 5, of which 4 air channels have a nearly circular structure when projected in a plane perpendicular to the axis of the air flow channel 4, and are first-type air channels 403. The other 4 air channels have a long strip structure when projected in a plane perpendicular to the axis of the air flow channel 4, and are second-type air channels 404. The first-type air channels 403 and the second-type air channels 404 are alternately arranged along the circumference of the air flow channel 4.

[0109] Each first-type air duct 403 is provided with a group of fan blades, and each second-type air duct 404 is provided with two groups of fan blades.

[0110] A raised structure 6 is provided in each second-type air duct 404 , which is divided into a first air duct portion 40A and a second air duct portion 40B by the raised structure 6 . Two groups of fan blades 3 are respectively located in the first air duct portion 40A and the second air duct portion 40B.

[0111] It should be noted that, except for the specific structure and quantity of components, the distribution and structure of the air duct, and the distribution position and quantity of the wind blades, the wind power generation devices of the above-mentioned embodiments have the same structural dimensions.

[0112] In one specific embodiment, the multiple groups of blades 3 within the airflow channel include blades that rotate clockwise and blades that rotate counterclockwise. Specifically, adjacent blades 3 rotate in opposite directions to offset the effect of output torque on the wind turbine's posture, maintaining overall balance and stability at high altitude.

[0113] Currently, common wind turbines typically use large blades to convert wind energy. The higher the power generated, the larger the blade diameter. However, larger blade diameters also generate greater torque when capturing wind energy. This increased torque can cause the turbine to experience severe roll disturbances or even capsize. To mitigate the negative effects of large blade diameters, smaller blade diameters are a viable option. However, it's generally accepted that smaller blade diameters reduce the swept area, directly impacting power generation.

[0114] The wind power generation device provided in the embodiment of the present application is based on the annular airflow channel formed by the main sac and the annular wings, and is divided into multiple air ducts by components. Then, multiple small wind blades are used. By adjusting the blade diameter, the number of wind blades and the size of the air duct in combination with the working height of the wind power generation device and the required power generation power, the same power generation power as that of large wind blades is achieved, thereby overcoming the influence of the reduction of the wind blade radius on the power generation power.

[0115] Assuming the free stream wind speed is the same, the total power required is P.

[0116] If the radius of a large wind blade is R, under the same power generation, the radius r of n groups of wind blades should be:

[0117]

[0118] Since the aerodynamic characteristics of commonly used airfoils have certain similarities, in order to ensure the aerodynamic efficiency of the fan blade, the blade tip linear velocity is always between 0.3-0.6ma. In order to pursue the smallest possible torque, the blade tip linear velocity is taken as the maximum as possible. Therefore, it is recommended to set the blade tip linear velocity of the large fan blade and the blade tip linear velocity of the n group of small fan blades V tip same.

[0119] Then, the output torque Q1 of the large fan blade is:

[0120]

[0121] Similarly, if the total power of a large counter-rotating wind turbine is achieved by n sets of blades, the output torque Qn of each set of blades is:

[0122]

[0123] The total output torque Q2 of n groups of fan blades is:

[0124]

[0125] By comparing Q1 and Q2, it can be seen that under the same total power output, the total output torque of n groups of wind blades is still less than the total output torque of a single large wind turbine. Under the premise of ensuring the same power generation, it can reduce the impact of torque on the wind power generation device and improve the stability of the wind power generation device.

[0126] In a specific embodiment, Figure 1 as well as Figure 8-9 As shown, the main bladder 1 has a low-resistance aerodynamic shape of a body of revolution and is a major source of buoyancy for the wind turbine. The main bladder 1 is divided into a first portion 11 and a second portion 12 along the front-to-back direction. The first portion 11 extends along the front-to-back direction. The outer peripheral surface of the first portion 11 is a rotating surface, and the diameter of the first portion 11 gradually increases from front to back. The second portion 12 extends along the front-to-back direction, and the outer peripheral surface of the second portion 12 is a rotating surface, and the diameter of the second portion 12 gradually decreases from front to back. Furthermore, the front end of the first portion 11 is a circular arc surface, and the rear end of the second portion is a circular arc surface. The external features of the main bladder 1 are similar to those of traditional airships or moored boats. The external features of the main bladder 1 can reduce the flow resistance of the airflow when it passes through, and push the free flow to the surrounding areas of its own outer peripheral surface, inducing the airflow to accelerate into the airflow channel 4 where the wind blades 3 are located. In addition, the stability of the wind turbine at high altitudes can also be enhanced.

[0127] Specifically, the first portion 11 has a rotating body shape, more specifically, the first portion has a streamlined shape, and the generatrix of the outer peripheral surface of the first portion 11 can be an ellipse or other curve with a gradually increasing curvature radius.

[0128] Specifically, the second portion 12 has a rotating body shape, more specifically, the second portion has a streamlined shape, and the generatrix of the outer peripheral surface of the second portion 12 can be an ellipse or other curve with a gradually increasing curvature radius.

[0129] In this embodiment, the main bladder 1 is a one-piece structure, with the junction of the first and second sections 11 and 12 marking the maximum diameter of the main bladder 1. This bladder 1 exhibits a favorable aspect ratio, saving significant material and weight. Furthermore, its relatively regular shape provides a spacious interior, facilitating the placement of auxiliary airbags and other internal regulatory features. The functional integrity of the main bladder 1 is comparable to that of a traditional aerostat or airship, making it feasible for launch from land to high-altitude environments.

[0130] The main bladder 1 is filled with a buoyancy gas, such as helium or hydrogen, and the type of buoyancy gas is not limited. A secondary airbag is provided inside the main bladder 1 to adjust the internal pressure of the main bladder 1 and maintain the aerodynamic shape of the main bladder 1.

[0131] like Figure 1 as well as Figure 8-9 As shown, the annular wing 2 is positioned radially outward of the second portion 12, with the front end of the annular wing 2 positioned behind the front end of the second portion 12, and the rear end of the annular wing 2 positioned in front of the rear end of the second portion 12. The combined action of the main bladder 1 and the annular wing 2 places the aerodynamic center of pressure behind the center of buoyancy, providing a self-aligning torque when the wind turbine is facing windward.

[0132] In this embodiment, the ratio of the aerodynamic downward pressure or lift provided by the main bladder 1 and the annular wing 2 is 1:5.5.

[0133] In a specific embodiment, the main bag body 1 and the annular wing 2 are coaxially arranged to form an air flow channel 4 with an annular structure. The front end of the air flow channel 4 is an air inlet, and the rear end is an air outlet. The ring width of the air flow channel inlet is smaller than the ring width of the air flow channel outlet.

[0134] In this embodiment, Figure 8 As shown, airflow channel 4 is a convergent-then-divergent channel, divided from the air inlet to the air outlet into a converging section 41, a throat 42, and a diverging section 43 according to the annular width. The combined action of converging section 41, throat 42, and diverging section 43 creates a Venturi effect, causing the free airflow to accelerate again at throat 42, thereby providing blades 3 with greater driving force, converging the free airflow energy, and reducing blade size.

[0135] In a specific embodiment, the inner circumference of the annular wing 2 is a revolution surface, including a first surface 21 and a second surface 22 . The junction of the first surface 21 and the second surface 22 is the minimum point of the inner diameter of the annular wing 2 , corresponding to the position of the throat 42 .

[0136] The inner diameter of the first surface 21 gradually decreases from front to back, forming a tapered section 41 between the first surface 21 and the corresponding radial outer wall of the second portion 12; the inner diameter of the second surface 22 gradually increases from front to back, forming a gradually expanding section 43 between the first surface 21 and the corresponding radial outer wall of the second portion 12.

[0137] The outer circumference of the annular wing 2 is a surface of revolution, and the diameter of the outer circumference of the annular wing 2 gradually increases and then gradually decreases from front to back. The annular wing includes a third surface 23 and a fourth surface 24, and the junction of the third surface 23 and the fourth surface 24 is the maximum point of the outer diameter of the annular wing 2.

[0138] The diameter of the third surface 23 gradually increases from front to back; the diameter of the fourth surface 24 gradually decreases from front to back.

[0139] The axial length of the third surface 23 is equal to the axial length of the first surface 21 , and the axial length of the fourth surface 24 is equal to the axial length of the second surface 22 .

[0140] The front and rear ends of the annular wing 2 are both arc angles.

[0141] That is to say, the annular wing 2 has a rotating body shape, a symmetrical airfoil shape and a macroscopic shape of a round head and a pointed tail.

[0142] In one embodiment, the fan blades 3 include blades and a generator driven by the blade rotation. The blades are arranged at the throat, with their rotational axes passing through a plane perpendicular to the axis of the airflow channel 4. Airflow enters the airflow channel 4 from the air inlet, accelerates through the converging section 41, and reaches the fan blades 3. After passing through the blades of the fan blades 3, the airflow passes through the diverging section 43 and finally exits the airflow channel 4 through the air outlet. When the high-speed airflow passes through the blades, the blades rotate, driving the generator's input shaft to rotate, cutting magnetic flux lines to generate current, thereby generating wind power.

[0143] In this embodiment, the fan blade 3 is arranged in the air flow channel 4 through a supporting structure (not shown in the figure), and the supporting structure is connected to the main bag 1 and / or the annular wing 2 for the installation of the fan blade 3. The blades of the fan blade 3 need to be arranged in the air flow channel 4, located at the throat 42, at the place where the wind speed is the largest in the air flow channel 4, which greatly enhances the power generation efficiency. Specifically, the fan blade 3 converts the mechanical energy contained in the high-speed airflow at the throat 42 into mechanical energy for the rotation of the fan blade 3 and drives the generator to generate electricity. According to Bernoulli's principle, when the free flow passes through the air flow channel 4, the cross-sectional area at the throat 42 is the smallest, the air flow speed is the largest, and the pressure is the smallest. Setting the blades at the throat 42 can make full use of the energy of the high-speed airflow, so that the fan blade 3 obtains a greater driving force, thereby improving the power generation efficiency.

[0144] The specific position of the generator is not shown in the drawings. The generator can be arranged inside the main bladder 1 or in the air flow channel 4 through a supporting structure.

[0145] In one specific embodiment, the air duct 40 includes a portion corresponding to the throat 42 in the front-to-back direction. Because the air duct 40 is defined by a component on the airflow channel 4 and the annular width of the airflow channel 4 is fixed, the inner diameter of the air duct 40 is limited by the annular width of the airflow channel 4 and the outer diameter of the blades 3. Specifically, the inner diameter of the portion of the air duct 40 corresponding to the throat 42 is equal to the annular width at the throat 42 and is 1-1.2 times the outer diameter of the blades 3 to allow for sufficient deformation clearance.

[0146] In a specific embodiment, the wind power generation device further includes a tail wing 7. Figure 9 As shown, in this embodiment, there are four tail fins 7, which are arranged in an X-shaped distribution structure on the outer wall of the annular fin 2 and located at the trailing edge of the annular fin 2. It is understood that in actual use, the number and distribution structure of the tail fins 7 can be adjusted according to needs.

[0147] Specifically, the tail wing 7 utilizes a trapezoidal swept wing. This assists the main bladder 1 in increasing dynamic lift when facing the wind, while also shifting the aerodynamic center backward, allowing the wind turbine to automatically face and face the wind around the mooring line. Specifically, the tail wing 7 utilizes a modified airfoil profile based on NACA0020, resulting from its natural deformation after inflation.

[0148] The main bag body 1, the annular wing 2 and the wind blade 3 can be connected by using tension cables or brackets formed by overlapping various pipes. The specific design needs to be optimized based on the actual project.

[0149] The following provides a feasible design scheme of a wind power generation device that has been verified by simulation as an example.

[0150] The wind power generation device includes 12 groups of fan blades. The air flow channel is divided into 12 air ducts by a diaphragm, and each air duct is equipped with a group of fan blades.

[0151] Taking the maximum diameter D of the main capsule 1 as the size reference, the axial length of the main capsule 1 is designed to be L = 3.24D, the axial length of the annular wing 2 is c = 1.2D, the distance d = 1.65D between the front end of the annular wing 2 and the front end of the main capsule 1, the distance e = 2.07D between the maximum diameter of the annular wing 2 and the front end of the main capsule 1, the annular width at the throat is 0.35D, and the outer diameter of the fan blade is f = 0.3D.

[0152] The root chord length of the tail wing is g = 0.59D, and the tip chord length is h = 0.38D.

[0153] The width a of the connection end between the diaphragm and the annular wing 2 is 0.35D, the width b of the connection end between the diaphragm and the main sac 1 is 0.06D, and the average axial length of the diaphragm is 0.47D.

[0154] Reference Figure 11Using CFD, the startup characteristics of the wind turbine provided by the aforementioned design were simulated. The simulation assumed a 10-degree angle of attack for the wind turbine, generating a velocity contour plot along the central axis. It can be seen that the airflow at throat 42, despite the retardation of the blades, still exhibits a significant increase in velocity. Furthermore, the wake flow at the rear end of the wind turbine exhibits a significant loss in air velocity, indicating a decrease in air velocity compared to before passing through the wind turbine. This decrease in airflow energy indicates that the airflow energy is being consumed and captured.

[0155] Another embodiment of the present invention provides a wind power generation system comprising ground facilities, a mooring rope, an auxiliary airbag, and the wind power generation device provided in the above-mentioned embodiment. The ground facilities are an important component for ensuring the normal operation, power transmission, and maintenance of the wind power generation device. The mooring rope is used to connect the wind power generation device and the ground facilities, with one end connected to the wind power generation device and the other end connected to the ground facilities, to improve the stability of the wind power generation device and provide a power transmission channel. The auxiliary airbag is generally disposed within the main airbag body and the annular wing.

[0156] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A wind power generation device, characterized in that: include: a main bladder body, the main bladder body extending in the front-to-back direction, the outer peripheral surface of which is a rotational surface; an annular wing, the annular wing being sheathed radially outside the main bladder body and spaced apart from the main bladder body, with an airflow channel formed between an inner wall of the annular wing and an outer wall of the main bladder body; and The air flow channel is divided into a plurality of air ducts by components. The plurality of air ducts are arranged along the circumference of the main bag body. At least some of the plurality of air ducts are provided with fan blades.

2. The wind power generation device according to claim 1, characterized in that: The component is a diaphragm, which is arranged in the air flow channel, with one end connected to the inner wall of the annular wing and the other end connected to the outer wall of the main bag body.

3. The wind power generation device according to claim 1, characterized in that: The component is a raised structure, which includes a first raised structure located on the inner wall of the annular wing and protruding toward the main bladder body, and a second raised structure located on the outer wall of the main bladder body and protruding toward the annular wing.

4. The wind power generation device according to claim 2, characterized in that: Both sides of the diaphragm are inward-curved smooth surfaces, and the front and rear edges of the diaphragm are inward-curved smooth curves; The projection of the diaphragm in a plane perpendicular to the axis of the main balloon is an hourglass structure.

5. The wind power generation device according to claim 3, characterized in that: The generatrix of the outer peripheral surface of the first protrusion is a part of an ellipse or a circle; A generatrix of an outer peripheral surface of the second protrusion is a portion of an ellipse or a circle.

6. The wind power generation device according to claim 1, characterized in that: The projection of the air duct in a plane perpendicular to the axis of the air flow channel is a long strip structure and / or a nearly circular structure.

7. The wind power generation device according to claim 1, characterized in that: The plurality of air ducts are evenly arranged along the circumference of the air flow channel and are centrally symmetrically arranged about the center of the air flow channel.

8. The wind power generation device according to claim 1, characterized in that: The main bag body is divided into a first part and a second part along the front-to-back direction; The main sac is an integrated structure, and the junction of the first part and the second part is the position where the diameter of the main sac is the largest; The annular wing sleeve is located radially outside the second part, the front end of the annular wing is located behind the front end of the second part, and the rear end of the annular wing is located in front of the rear end of the second part.

9. The wind power generation device according to claim 1, characterized in that: The front end of the air flow channel is the air inlet, and the rear end is the air outlet. The air flow channel is divided into a gradually contracting section, a throat and a gradually expanding section according to the ring width from the air inlet to the air outlet. The ring width of the air flow channel inlet is smaller than the ring width of the air flow channel outlet.

10. The wind power generation device according to claim 9, characterized in that: The inner circumference of the annular wing is a revolution-shaped surface, including a first surface and a second surface. The junction of the first surface and the second surface is the minimum point of the inner diameter of the annular wing, corresponding to the throat; The inner diameter of the first surface gradually decreases from front to back, forming a tapered section between the first surface and the corresponding outer wall of the main bladder; The inner diameter of the second surface gradually increases from front to back, and forms a gradually expanding section between the second surface and the corresponding outer wall of the main bladder.

11. The wind power generation device according to claim 9, characterized in that: It also includes a support structure, through which the fan blades are arranged in the air flow channel; The wind blade includes a blade and a generator driven by the rotation of the blade; The blades are located at the throat.

12. The wind power generation device according to claim 9, characterized in that: The air duct includes a portion corresponding to the throat in the front-to-back direction, the inner diameter of the portion is equal to the ring width at the throat, and the inner diameter of the portion is 1-1.2 times the outer diameter of the fan blade.

13. The wind power generation device according to claim 1, characterized in that: It also includes four tail fins arranged in an X-shaped distribution structure on the outer wall of the annular wing, and the tail fins are located at the trailing edge of the annular wing; The tail wing is a trapezoidal swept wing.

14. The wind power generation device according to claim 1, characterized in that: The air duct includes a first air duct provided with fan blades and a second air duct not provided with fan blades; The air flow channel is divided into 3-24 first air channels by components, and each first air channel is equipped with at least one set of fan blades.

15. The wind power generation device according to claim 1, characterized in that: The plurality of groups of fan blades located in the air flow channel include fan blades with a clockwise rotation direction and fan blades with a counterclockwise rotation direction.

16. A wind power generation system, characterized in that: include: Ground facilities; The wind power generation device according to any one of claims 1 to 15; A mooring rope, one end of which is connected to the wind turbine generator, and the other end of which is connected to a ground facility.

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