Multi-rotating-barrel-body wind power generation device based on wind pressure difference driving and using method thereof

Abstract

The invention provides a multi-rotating-barrel wind power generation device based on wind pressure difference driving and a using method thereof.The multi-rotating-barrel wind power generation device comprises a center rotating shaft, the center rotating shaft is used for supporting and linking an inner barrel and an outer barrel, and the center rotating shaft is connected with a generator rotor; the outer barrel is of a hollow cylinder structure and is fixed to the outer ring of the center rotating shaft, and inclined flow guide type ventilation holes are formed in the barrel wall of the outer barrel and deviate towards the air flow direction. The inner barrel is of a hollow cylinder structure, the center rotating shaft is sleeved with the inner barrel, the inner barrel and the outer barrel are coaxial, the barrel wall of the inner barrel is provided with straight-through or inward-inclined-guiding ventilation holes, and part of the ventilation holes in the inner barrel are of a contraction-expansion type venturi tube structure; the diameter of the ventilation holes in the outer barrel is larger than that of the ventilation holes in the inner barrel. The double-barrel-body structure is adopted, the low-wind-speed starting capacity is high, each barrel body is provided with the ventilation holes, natural wind currents are guided into the barrel bodies through the wind guiding devices, the barrel bodies are driven to rotate through the positive and negative pressure difference, and the double-barrel-body design brings a larger wind stress area.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, and more particularly to a multi-rotating barrel wind power generation device driven by wind pressure difference and its usage method. Background Art

[0002] Most traditional wind power generation devices adopt a single three-blade wind wheel structure, which has problems such as a relatively high starting wind speed and low efficiency at low wind speeds. At the same time, the aerodynamic responsiveness and adaptability of wind power generation devices are also restricted to a certain extent. Especially in scenarios with large wind speed variations, the output power of traditional wind power generation devices fluctuates greatly, affecting the stability and efficiency of power generation.

[0003] In recent years, the design of wind energy devices focusing on multi-stage supercharging, multi-chamber structure and aerodynamic coupling optimization has gradually attracted attention. Some studies propose to guide the airflow direction through a barrel structure or a composite cavity structure to create a pressure difference to enhance torque output, and attempt to optimize the boundary layer airflow state by combining flow guiding vanes, flow disturbing structures, etc., so as to reduce the starting wind speed of the system and improve energy utilization efficiency. However, the existing technology still mainly focuses on a single cavity or fixed ventilation hole arrangement, and fails to fully utilize the synergistic supercharging and differential pressure driving advantages between multiple layers.

[0004] In addition, for the adaptability problem of wind energy devices in multi-wind speed environments, some technical solutions attempt to introduce adjustable wind guiding plates or variable structure blades to adapt to different wind conditions, but often accompanied by complex actuators and increased maintenance costs, which is not conducive to the long-term stable operation of the equipment. Therefore, how to achieve efficient start-up and continuous drive at medium and low wind speeds on the basis of a simple and reliable structure has become an important issue that urgently needs to be solved in the field of wind power generation device design. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-rotating barrel wind power generation device driven by wind pressure difference and its usage method, aiming to improve the aerodynamic efficiency, adaptability and stability of wind power generation devices. Through a double-barrel relative rotation mechanism, a phase adjustment device and an aerodynamic adaptability enhancement mechanism, the device can maintain high-efficiency wind energy capture ability at different wind speeds, and can dynamically adjust torque output through an intelligent control system to ensure stable operation.

[0006] According to an object of the present invention, the present invention provides a multi-rotating barrel wind power generation device driven by wind pressure difference, including a central rotating shaft, an outer barrel and an inner barrel. The central rotating shaft is used to support and link the inner barrel and the outer barrel, and the central rotating shaft is connected to the generator rotor; the outer barrel is a hollow cylindrical structure, the outer barrel is fixed on the outer circle of the central rotating shaft, and the barrel wall of the outer barrel is provided with ventilation holes of an inclined diversion type, and the ventilation holes are biased towards the wind flow direction; the inner barrel is a hollow cylindrical structure, the inner barrel is sleeved on the central rotating shaft and is coaxial with the outer barrel, and the barrel wall of the inner barrel is provided with ventilation holes of a straight-through or inwardly inclined guiding type, and some of the ventilation holes on the inner barrel adopt a contraction-expansion type Venturi tube structure; the aperture of the ventilation holes on the outer barrel is larger than that of the ventilation holes on the inner barrel.

[0007] Further, it further includes a phase adjustment mechanism, and the phase adjustment mechanism is used to dynamically adjust the relative phase angle of the ventilation holes of the outer barrel and the inner barrel.

[0008] Further, the control strategy of the phase adjustment mechanism is as follows: When the wind speed is low < 3m / s, the misalignment angle is set to 45° - 90°; When the wind speed is medium 3 - 7m / s, the misalignment angle is set to 90° - 135°; When the wind speed is high > 7m / s, the misalignment angle is set to 180°.

[0009] Further, it further includes an eddy current generating component, and the eddy current generating component includes a V-shaped spoiler arranged at the edge of the ventilation holes on the outer barrel and a micro-convex rib structure on the ventilation holes on the inner barrel.

[0010] Further, it further includes a braking and safety device. When the wind speed exceeds 18m / s, the electromagnetic brake or the wind resistance piece is used for speed limiting, and at the same time, the misalignment angle is increased through the phase adjustment mechanism to reduce the torque.

[0011] Further, the ventilation holes on the outer barrel are arranged in an asymmetric spiral belt type, and the ventilation holes spiral upward along the barrel body of the outer barrel by 20° - 45°.

[0012] Further, a wear-resistant ceramic layer is pasted or a low-friction resistance coating is coated on the orifice area of some of the ventilation holes on the inner barrel, and the ventilation holes are arranged to form an asymmetric spiral belt, and the spiral rising angle of the asymmetric spiral belt is 20° - 45°.

[0013] According to another object of the present invention, the present invention provides a use method of the above-mentioned multi-rotating barrel wind power generation device driven by wind pressure difference, including the following steps: Startup stage, low wind speed < 3 m / s: Set the misalignment angle between the ventilation holes of the outer barrel and the inner barrel to 45° - 90° through the phase adjustment mechanism, and use the inclined diversion holes of the outer barrel to guide the airflow to impact the inner barrel, reducing the startup resistance, so that the outer barrel rotates first and drives the central rotating shaft. Operation stage, medium to high wind speed 3 - 7 m / s: Adjust the misalignment angle to 90° - 135°, and enhance the negative pressure suction area through the pressure difference coupling between the diversion holes of the outer barrel and the Venturi holes of the inner barrel, driving the synchronous rotation of the inner and outer barrels. High wind speed protection stage, > 7 m / s: Set the misalignment angle to 180°, and at the same time start the braking device to limit the speed, and enhance the airflow disturbance through the eddy current spoiler to reduce the effective ventilation volume.

[0014] Furthermore, the phase adjustment mechanism monitors the wind speed in real time through the wind speed sensor, and the microprocessor drives the servo motor to perform dynamic adjustment, forming a closed-loop control, and the adjustment accuracy is not less than 1°.

[0015] Furthermore, the V-shaped spoilers of the ventilation holes on the outer barrel create eddy currents when the airflow passes through, breaking the boundary layer to increase the dynamic pressure, and the micro-convex rib structure of the ventilation holes on the inner barrel enhances the airflow stability through shear disturbance.

[0016] The technical solution of the present invention adopts a double-barrel structure. Each barrel is provided with inclined ventilation holes. The natural wind flow is guided into the barrel through the air guiding device, and the rotation of the barrel is driven by the positive and negative pressure difference. The wind energy capture efficiency per unit frontal area is improved, which is significantly better than the traditional three-blade wind wheel structure of the same size. The present invention has strong low wind speed startup ability. The double-barrel design brings a larger wind-force receiving area, and the ventilation hole structure can form a local acceleration effect at low wind speeds, enabling the device to have a lower startup wind speed, which is better than the startup wind speed threshold of traditional wind turbines. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present invention; Figure 2 It is another schematic structural diagram of an embodiment of the present invention; Figure 3 It is a schematic structural diagram of the outer barrel of an embodiment of the present invention; Figure 4 It is a schematic structural diagram of the inner barrel and the outer barrel of an embodiment of the present invention; In the figure, 1 is the central rotating shaft; 2 is the outer barrel; 3 is the inner barrel; 4 is the ventilation hole; 5 is the V-shaped spoiler; 6 is the generator; 7 is the base; 8 is the micro-convex ridge structure. Detailed implementation manners

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] Embodiment 1 As Figures 1-4 shown: A multi-rotating barrel wind power generation device driven by wind pressure difference includes a central rotating shaft 1, an outer barrel 2 (the first rotating body) and an inner barrel 3 (the second rotating body). A plurality of ventilation holes 4 are provided on both the inner barrel 3 and the outer barrel 2. By designing a reasonable hole type structure and arrangement method, the air pressure difference coupling between the inner and outer barrels is realized to drive the device to rotate. The ventilation holes 4 of the outer barrel 2 are inclined for guiding air, while the ventilation holes 4 of the inner barrel 3 are for sucking air and accelerating the air flow, forming a negative pressure attraction area to enhance the wind energy conversion efficiency.

[0023] To adapt to different wind speed conditions, the phase adjustment mechanism between the outer barrel 2 and the inner barrel 3 can dynamically adjust the angles of the ventilation holes 4 of the inner and outer barrels, thereby optimizing the wind energy capture efficiency. In addition, the ventilation holes 4 of the inner barrel 3 also have a micro-perturbation flow structure and a Venturi tube design to further increase the air flow speed and energy conversion efficiency.

[0024] In this embodiment, the wind power generation device adopts a two-layer barrel structure, where the outer barrel 2 is a cylindrical structure with a larger diameter, and the inner barrel 3 is a cylindrical structure with a smaller diameter. Both the inner barrel 3 and the outer barrel 2 are made of high-strength lightweight composite materials to ensure the structural strength while reducing the weight of the device.

[0025] Design of the ventilation holes 4 of the inner and outer barrels: The ventilation holes 4 of the inner barrel 3 are straight through holes or inwardly inclined guiding holes, with the aperture controlled between 20 mm and 30 mm and the hole depth not exceeding 20 mm. The ventilation holes 4 of the outer barrel 2 are inclined, biased towards the wind flow direction, and the aperture is appropriately larger than that of the ventilation holes 4 of the inner barrel 3. To enhance the air flow speed and dynamic pressure conversion efficiency, some of the ventilation holes 4 of the inner barrel 3 adopt a contraction-expansion type Venturi tube structure, and a wear-resistant ceramic layer can be pasted or a low friction resistance coating can be applied in the orifice area.

[0026] Arrangement of the double barrels and air flow guidance: The ventilation holes 4 of each barrel adopt an asymmetric spiral ring belt arrangement, and the hole belt spirals up along the barrel by 20° to 45° to ensure that the air flow can be evenly guided along the barrel. The hole density is higher on the windward side and lower on the leeward side to form a local high-pressure - low-pressure air flow difference, thereby enhancing the wind energy conversion efficiency.

[0027] Phase adjustment mechanism: The angle between the inner barrel 3 and the outer barrel 2 can be dynamically adjusted. Under different wind speed conditions, the phase angle of the inner barrel 3 can adjust the relative phase relationship (misalignment angle) between the ventilation holes 4 of the outer barrel 2 and the inner barrel 3 as needed to ensure the maximization of the wind energy conversion efficiency.

[0028] Structural stability: The double barrel design has a natural mass symmetry characteristic, which can effectively reduce the vibration caused by wind speed changes, thereby enhancing the stability of the system.

[0029] In this implementation, a more refined control system can also be adopted. In an environment with large wind speed variations, the phase adjustment of the inner barrel 3 and the outer barrel 2 is automatically adjusted by an electronic control system through real-time monitoring of the wind speed changes, so as to ensure that the wind power generation device can adapt to different wind speeds and wind field conditions.

[0030] The present invention improves the wind energy capture efficiency, starting performance and stability through multiple barrel structures and optimized ventilation hole 4 designs, and improves the adaptability and power generation efficiency of the device under different wind speed conditions through the double barrel phase adjustment structure.

[0031] Embodiment 2 This embodiment is basically the same as that of Embodiment 1, except that in this embodiment, the multi-rotating barrel wind power generation device driven by wind pressure difference specifically includes: A central rotating shaft 1, which is used to support and link the rotation of the inner and outer barrels, and the central rotating shaft 1 is connected to the rotor of the generator 6; An outer barrel 2, with a hollow cylindrical structure, fixed on the outer circle of the central rotating shaft 1; An inner barrel 3, with a hollow cylindrical structure, sleeved on the rotating shaft and coaxially installed with the outer barrel 2; Ventilation holes 4 are provided on the wall surfaces of both the outer barrel 2 and the inner barrel 3. The distribution form of the ventilation holes 4 is non-uniformly arranged and combined with the design of the inclination angle to form a pressure difference. Among them: The ventilation holes 4 of the inner barrel 3 are straight through holes or inner inclined guiding holes, with a pore diameter of 20 mm to 30 mm. Some of the ventilation holes 4 of the inner barrel 3 adopt a contraction-expansion type Venturi tube structure. The arrangement of the ventilation holes 4 of the inner barrel 3 adopts a spiral ring belt type arrangement, and the hole belt spirally rises along the barrel body by 20° to 45°. A micro-convex rib structure 8 is provided in the orifice area of the ventilation holes 4 of the inner barrel 3 to create air flow shear disturbance and increase the flow velocity stability.

[0032] The ventilation holes 4 of the outer barrel 2 are inclined holes, biased towards the wind flow direction, and the pore diameter is larger than that of the ventilation holes 4 of the inner barrel 3. A plurality of ventilation holes 4 are provided on the outer barrel 2, and an asymmetric distribution strategy is adopted. The ventilation holes 4 are asymmetrically distributed, and the hole density is the highest in the windward area and arranged in a spiral or inclined strip shape along the barrel body.

[0033] The arrangements of the ventilation holes 4 of the inner barrel 3 and the outer barrel 2 are asymmetric to adapt to the air flow guidance under different wind speed conditions. The phase adjustment mechanism between the outer barrel 2 and the inner barrel 3 can dynamically adjust the rotation angle of the inner barrel 3 relative to the outer barrel 2.

[0034] It also includes a phase adjustment mechanism. The phase adjustment mechanism controls the rotation angle of the inner barrel 3 manually, or by a stepper motor or a servo motor. The inner barrel 3 is fixed to the central rotating shaft 1 through a linkage collar. The angle misalignment of the ventilation holes 4 between the outer barrel 2 and the inner barrel 3 is realized through an adjustable phase adjustment device, and the rotation angle of the outer barrel 2 is adjusted according to the wind speed change.

[0035] Specifically, the phase adjustment system: 1. Low wind speed (<3 m / s): The misalignment angle of the outer barrel 2 relative to the inner barrel 3 is set to 45° to 90°, and at this time, the starting ability is improved by reducing the direct wind resistance of the air flow; 2. Medium wind speed (3–7 m / s): The misalignment angle of the outer barrel 2 is set to 90° to 135° to enhance the pressure difference driving ability; 3. High wind speed (>7 m / s): The misalignment angle of the outer barrel 2 is set to 180° to optimize the pneumatic energy input and ensure the maximum torque output.

[0036] The phase adjustment actuator can be controlled by a stepper motor or a servo motor to rotate, with high precision and response speed. It can also be equipped with a centrifugal limit device to automatically increase the misalignment angle at high wind speeds to avoid overload.

[0037] In this embodiment, the inner barrel 3 and the outer barrel 2 are made of a lightweight and high-strength composite material, enhancing the wind pressure resistance of the device. Wear-resistant ceramic layers or low-friction coatings are provided on both the outer barrel 2 and the inner barrel 3 to improve the service life. The wind power generation device is applicable to environments with a wind speed of more than 2.2 m / s. The starting wind speed of the device is lower than 3 m / s.

[0038] The shape of the ventilation hole 4 is designed to be slightly inclined to facilitate the concentration and acceleration of air flow. A V-shaped spoiler 5 is provided at the edge of the ventilation hole 4 to disturb the air flow boundary layer and enhance the dynamic pressure of the air flow entering the orifice. The shape of the V-shaped spoiler 5 is an inverted triangle or a concave "V" shape, and it is installed at the edge of the inlet or outlet of the ventilation hole 4. The wind power conversion efficiency is improved through the V-shaped spoiler 5. The aperture of the ventilation hole 4 can be optimized according to the wind speed to ensure the wind energy capture efficiency under different wind speed conditions. The main structures of the outer barrel 2 and the inner barrel 3 can be manufactured using glass fiber-reinforced thermosetting composite materials (GFRP), which have the characteristics of lightweight and high strength. The ventilation hole 4 can be processed using laser cutting and CNC drilling and milling technologies to ensure high precision of the aperture and hole arrangement.

[0039] The modular design of the device enables each barrel to be independently replaced and maintained. The device is suitable for distributed wind power generation in special environments such as deserts, islands, and mountains. The device can maintain efficient and stable operation in an environment with large wind speed variations. The device has anti-vibration ability and can effectively reduce the vibration impact caused by uneven wind speed.

[0040] The present invention adopts a double-barrel relative rotation mechanism. The inner and outer barrels are connected by a central rotating shaft 1. The phase adjustment device controls the phase angle of the ventilation hole 4 of the outer barrel 2 relative to the inner barrel 3, and optimizes the air flow path by precisely adjusting the misalignment angle; the wind energy collection and guiding design adopts an asymmetric ventilation hole 4 and a V-shaped spoiler 5 to improve the air flow disturbance and dynamic pressure conversion efficiency.

[0041] Embodiment 3 This embodiment more specifically elaborates on the structure and manufacturing of the multi-rotating barrel wind power generation device driven by wind pressure difference.

[0042] In this embodiment, the multi-rotating barrel wind power generation device driven by wind pressure difference mainly consists of two coaxially arranged hollow cylinders, namely the inner barrel 3 and the outer barrel 2. The two are concentrically installed on a central rotating shaft 1. The inner barrel 3 and the outer barrel 2 have different radii and are nested in a sleeve-like structure. The barrel walls of the inner barrel 3 and the outer barrel 2 are both provided with a plurality of non-uniformly distributed ventilation holes 4, that is, the ventilation holes 4 are asymmetrically and irregularly arranged in terms of quantity, size, and position in all directions.

[0043] Wind enters the inner barrel 3 and the outer barrel 2 from the windward side of the device. First, it passes through the ventilation holes 4 of the outer barrel 2, and when entering the inner barrel 3, it is again affected by the distribution of the ventilation holes 4 of the inner barrel 3, forming a complex wind pressure difference and vortex structure inside the barrel. Due to the directional and non-uniform design of the ventilation holes 4 of the inner and outer barrels, the air flow will form a higher pressure difference in a specific direction when passing through the barrel, thereby forming an unbalanced driving torque on the barrel and prompting the inner and outer barrels to rotate around the central rotating shaft 1 at different speeds or in different directions.

[0044] The rotation of the inner barrel 3 and the outer barrel 2 jointly drives the central rotating shaft 1 to rotate. The central rotating shaft 1 is connected to the generator 6 to realize the conversion of rotational mechanical energy into electrical energy. Due to the double-barrel structure providing a more complex air flow regulation mechanism, this device can achieve higher wind energy capture efficiency under low wind speed or turbulent flow conditions and improve the overall power generation performance.

[0045] In addition, the inner and outer barrels can be prepared from lightweight and high-strength composite materials to reduce the rotational inertia and improve the response speed. Parameters such as the opening method, distribution density, angle, and shape of the ventilation holes 4 can be optimized according to different wind field environments, so as to realize the adaptive adjustment of the device to variable wind conditions. According to the installation requirements, this device can be flexibly configured into 6 groups of vertical-axis wind turbines, which are respectively suitable for various complex environments such as coastal areas, deserts, mountains, and urban rooftops, and have broad application value.

[0046] Through the unique double-barrel structure and non-uniform ventilation hole 4 distribution design, the present invention innovatively introduces the wind pressure difference driving principle, effectively improves the wind energy utilization rate, expands the applicable range of wind power generation devices, and provides a new technical solution for distributed wind energy development.

[0047] Specifically, the main components of the multi-rotating barrel wind power generation device driven by wind pressure difference in this embodiment are introduced as follows: First part, overall structure of the device I. This device includes the following main components: 1. Central rotating shaft 1: Used to support and link the rotation of the inner barrel 3 and the outer barrel 2 and provide mechanical input for the generator 6.

[0048] 2. Outer barrel 2 (first rotating body): A hollow cylindrical structure, located in the outermost layer, and fixed to the outer circle of the central rotating shaft 1.

[0049] 3. Inner barrel 3 (second rotating body): It is coaxially installed with the outer barrel 2, has a hollow cylindrical structure, is smaller in size than the outer barrel 2, and is sleeved on the central rotating shaft 1.

[0050] 4. Differential ventilation hole system: It is arranged on the wall surfaces of the outer barrel 2 and the inner barrel 3, has a non-uniform distribution form, and is designed in combination with the inclination angle to form a pressure difference.

[0051] 5. Phase adjustment mechanism: It is used to adjust the relative positional relationship of the ventilation holes 4 of the inner and outer barrels, and optimize the air flow utilization efficiency at different wind speeds.

[0052] 6. Vortex generation assembly: It includes the V-shaped spoiler 55 at the edge of the ventilation hole 4 on the barrel wall and the Venturi guiding structure at the ventilation hole 4 of the inner barrel 3.

[0053] 7. Power generation module: It includes the high-speed permanent magnet generator 6 connected to the central rotating shaft 1 and the rectifier control circuit.

[0054] 8. Support structure and bearing system: It includes the base 7, which provides structural support and rotational sliding support and adapts to axial and radial loads.

[0055] 9. Braking and safety device: It is used to actively limit the speed in the case of high wind speeds to ensure the safe operation of the system.

[0056] II. Structural design and connection relationship This embodiment adopts the following four unique design schemes, and uses the wind pressure difference driving principle to effectively improve the wind energy utilization rate.

[0057] Scheme 1: Differential ventilation hole design Structure: The ventilation hole 4 on the outer barrel 2 is an inclined guiding hole (guiding the air flow to impact the inner barrel 3); the ventilation hole 4 on the inner barrel 3 is a straight hole or reversely inclined to form a counter pressure difference.

[0058] Effect: The air flow accelerates after passing through the outer barrel 2, generates a stronger low-pressure area at the inner barrel 3, and increases the rotational speed.

[0059] Scheme 2: Double-barrel phase adjustment Structure: The initial positions of the ventilation holes 4 of the two barrels are adjustable (such as through a rotating sleeve).

[0060] Effect: Adapt to different wind speeds: At low speed, it is misaligned by 90° to reduce the starting resistance; at high speed, it is misaligned by 180° to maximize the torque.

[0061] Scheme 3: Different sizes of the inner and outer barrels Structure: The outer barrel 2 has a large diameter and few holes (capturing a large area of low-speed wind); the inner barrel 3 has a small diameter and dense holes (focusing the high-speed air flow).

[0062] Effect: Broaden the effective wind speed range and improve the power generation efficiency at low wind speeds.

[0063] Solution 4: Vortex generator design Structure: Vortex vanes are added to the edge of the ventilation holes 4 of the outer barrel 2, and the ventilation holes 4 of the inner barrel 3 are in the shape of a Venturi tube.

[0064] Effect: Vortices are generated in the outer barrel 2 to reduce the back pressure of the inner barrel 3, and the Venturi effect further increases the pressure difference.

[0065] Specifically, the design solutions for each component of the outer barrel 2 are as follows: 1. Design of the outer barrel 2 Structure: A hollow cylinder made of a high-strength composite material (such as carbon fiber-reinforced plastic or fiberglass composite).

[0066] Ventilation holes 4 of the outer barrel 2 (combination of Solution 1 and Solution 4): Multiple inclined diversion holes are distributed along the barrel wall, and the inclination angle is generally 30° - 60°; spiral or V-shaped spoiler vanes 5 are attached to the hole edges to create vortices; the hole diameter is large but the number is small to facilitate capturing a large area of incoming wind; the hole arrangement is non-uniform and mainly concentrated on the windward side.

[0067] Specific design of the ventilation holes of the outer barrel 1.1. Structural design 1.1.1. Hole type structure of the ventilation hole 4 Each ventilation hole 4 is an inclined diversion hole, and the hole channel of the ventilation hole 4 is inclined 20° - 45° relative to the barrel body normal direction; The cross-sectional shape of the ventilation hole 4 is oval or fish-eye-shaped, and the major axis is in the same direction as the tangent of the barrel, which is beneficial for air flow guidance; The outlet of the ventilation hole 4 is slightly enlarged (expansion angle 5° - 10°) to play an ejector role and promote air flow acceleration; Spoiler teeth / spoiler vanes are set at the edge of the ventilation hole 4, and the thickness of the spoiler structure is 0.5 - 2 mm to create vortices and enhance air flow disturbance.

[0068] 1.1.2. Dimensions of the ventilation holes The diameter or equivalent aperture of a single ventilation hole 4 ranges from 30 mm to 30 cm; For a large barrel, the hole area of the outer barrel 2 accounts for about 8% - 15% of the total surface area; The ventilation holes 4 on the same barrel can be divided into multiple size levels (large, medium, and small three grades) and are distributed in a circular gradient.

[0069] 1.1.3. Arrangement method of the ventilation holes The ventilation holes 4 on the outer barrel 2 are not evenly distributed, and an asymmetric partition intensive arrangement strategy is adopted; In the 45° center area of the windward side of the barrel (i.e. the main wind area), the hole density is the highest, accounting for more than 60% of the total number of holes; The number of holes in the leeward area is reduced, enhancing the front-to-back pressure difference; The ventilation holes 4 are arranged in a spiral or inclined strip shape along the barrel body, which can form a vortex airflow and help the barrel body to rotate continuously; Arrangement pattern diagram: a spiral belt of ventilation holes 4 is set every 20°~30°, and each belt contains 6~10 ventilation holes 4.

[0070] 1.14. Additional structure on the four sides of the ventilation hole V-shaped spoiler 5: installed at the inlet or outlet edge of each ventilation hole 4, used to disturb the boundary layer; the V-shaped spoiler 5 is a passive aerodynamic structure installed at the edge of the ventilation hole 4 of the outer barrel 2, and its shape is "V"-shaped or similar to a sawtooth protrusion. Its main function is to break the originally stable boundary layer when the airflow enters or flows out of the ventilation hole 4, stimulate local vortices, enhance disturbances, and improve the overall airflow kinetic energy conversion efficiency.

[0071] The spoiler is usually made of thin metal sheets (such as aluminum alloy, stainless steel) or composite materials (such as carbon fiber reinforced resin), with a thickness of 0.5 to 2 mm. It has good strength and flexibility and can adapt to slight deformation under wind pressure impact without damage.

[0072] The V-shaped spoiler 5 is generally installed in an inverted triangle or concave "V" shape at the upper edge, lower edge or both sides of the vent 4, and the specific position depends on the dominant direction of the wind and the inclination angle of the vent 4. The "fin" parts on both sides are tilted outward along the surface of the barrel by 5° to 20°, with sharp edges to tear the attached boundary layer airflow.

[0073] When the airflow passes through the V-shaped spoiler 5, small-scale turbulence and micro-vortices will be formed behind the spoiler, thereby improving the dynamic pressure efficiency of the airflow entering the ventilation hole 4; using the V-shaped spoiler 5 at the air outlet can also make the exhaust airflow form a vortex structure locally, extend the action path between the wind and the barrel wall, enhance the tangential effect of the wind on the barrel body, and further improve the torque.

[0074] In addition, the distribution of the V-shaped spoiler 5 can be continuous (along the edge of the entire ventilation hole 4) or discontinuous (arranged in a ring with 5 to 10 pieces as a group), and the spacing and angle can be optimized and determined based on wind tunnel experiments. In some high-performance designs, the spoiler can also have a microporous structure or be coated with a low-friction surface to further improve the airflow attachment state.

[0075] It is worth mentioning that under medium and low wind speed conditions, the V-shaped spoiler 5 can effectively reduce the starting wind speed threshold of the barrel, improve the responsiveness and applicability of the wind power generation device, and has high engineering value and application prospects.

[0076] Adjustable flow guiding valve plate: Some ventilation holes 4 are provided with movable flow guiding plates (such as aluminum alloy microplates), which can achieve wind direction-responsive opening and closing; Surface micro-engraved groove structure: Micro-grooves are engraved around the openings of the ventilation holes 4 to guide the air flow direction and enhance the eddy current.

[0077] 1.2. Mechanism of action and pneumatic effect 1.2.1. Wind energy collection and guidance The inclined flow guiding holes convert the horizontal wind into a tangential acting force, generating a rotational torque; The asymmetric dense distribution enables the windward side to obtain a strong dynamic pressure and the leeward side to form a negative pressure, realizing the unbalanced force on the barrel body to start rotating.

[0078] 1.2.2. Pressurization and acceleration The orifice of the ventilation hole 4 is smaller than the hole cavity, and a nozzle effect is formed at the outlet, and the air flow accelerates out; The arrangement of the ventilation holes 4 forms a circumferential vortex air flow structure for the barrel body, enhancing the rotational driving force; The multi-scale aperture design enables the wind energy to have good adaptability at different wind speeds.

[0079] 1.2.3. Coupling with the inner barrel 3 to form a differential pressure The air outlet of the outer barrel 2 and the air inlet of the inner barrel 3 form a counter-flushing path in space, further increasing the pressure difference between the inside and outside; The eccentric distribution of the ventilation holes 4 can guide the main flow bias pressure to impact the inner barrel 3, improving the cooperative driving efficiency.

[0080] 1.3. Suggestions on manufacturing methods Laser cutting + CNC drilling and milling: Suitable for high-precision hole processing on metal barrel bodies or composite material barrel bodies; Thermoforming die pressing method: For glass fiber / carbon fiber barrel bodies, the ventilation holes 4 can be embedded in the mold during the preforming stage; Modular assembly: The ventilation hole 4 area is made into an independent module and fixed to the main structure of the barrel body by snap-fastening or riveting, which is convenient for replacement and maintenance; 3D printing / additive manufacturing (suitable for small model machines): Used for rapid prototype testing and hole structure optimization.

[0081] 2. Design of the inner barrel 3 Structure: The diameter is smaller than that of the outer barrel 2, and the same lightweight composite material is selected to ensure dynamic response.

[0082] Design of the ventilation holes 4: Mostly straight holes or slightly reverse inclined angles (-10° to -30°), forming a "counter-flushing" ventilation path with the outer barrel 2; The density of the ventilation holes 4 is relatively high, but the single-hole diameter is small, which is conducive to concentrating the air flow; The periphery of the ventilation holes 4 is a trumpet-shaped or Venturi-shaped flow guiding structure, increasing the local wind speed and creating a negative pressure.

[0083] Specific design of the ventilation holes 4 of the inner barrel 3 The inner barrel 3, as one of the core kinetic energy conversion components of the wind power generation device, the design of its ventilation holes 4 not only determines the force distribution and rotational performance of the barrel itself, but also directly affects the construction of the air pressure difference and the coupling drive effect between the inner barrel and the outer barrel 2. Therefore, the ventilation holes 4 of the inner barrel 3 need to take into account the air flow responsiveness, structural strength, and aerodynamic matching with the outer barrel 2.

[0084] Specifically, the design solutions for each component of the inner barrel 3 are as follows: 2.1. Hole shape structure and dimensional parameters The ventilation holes 4 of the inner barrel 3 generally adopt an axial straight through hole or an inner inclined guiding hole structure. Different from the inclined hole and deflected flow design of the outer barrel 2, the holes of the inner barrel 3 focus more on concentrating wind energy and maintaining the characteristics of a high-speed and low-pressure channel. The inclination direction is opposite to or parallel to the air outlet direction of the outer barrel 2, forming a certain degree of counteracting effect.

[0085] The diameter of a single ventilation hole 4 is adjusted according to the barrel size, generally 20 mm to 60 mm. The hole diameter is slightly smaller than that of the outer barrel 2 to enhance the air flow velocity and entrainment effect. The hole depth is equal to the barrel wall thickness, generally not exceeding 8 mm. To enhance the air flow control performance, some ventilation holes 4 adopt a contraction-expansion type Venturi tube structure, that is, the hole mouth is narrowed, the middle part of the hole is constricted, and the end is slightly expanded, forming an internal pressure difference gradient to induce the air flow to accelerate through.

[0086] In addition, a micro convex rib structure (height about 0.2 - 0.5 mm, radially radiating) can be set on the inner wall of the ventilation hole 4 orifice area to create air flow shear disturbance and increase the flow velocity stability.

[0087] 2.2. Hole arrangement method and zoning strategy The ventilation holes 4 of the inner barrel 3 are arranged in an asymmetric spiral annulus pattern. Each annulus spirally ascends along the barrel by 20° to 45°. Each band contains 8 to 12 holes, and the interval between bands is optimized and adjusted according to the wind field simulation results. The hole band density shows a gradient structure along the circumferential distribution of the barrel, that is, dense on the windward side and sparse on the leeward side, to form a wind pressure field of "local high pressure - low pressure - suction acceleration".

[0088] To adapt to the air outlet mode of the ventilation holes 4 of the outer barrel 2, the ventilation holes 4 of the inner barrel 3 can be designed into an unequal pitch arrangement structure, that is, a high-density hole group is set in the area overlapping with the air outlet of the outer barrel 2 to enhance the penetration effect of the main air flow; while in the asymmetric area, it is left blank or a small number of auxiliary pressure guiding holes are set to balance the overall structural stress of the barrel.

[0089] When there is a phase adjustment mechanism between the two barrels, the arrangement of the ventilation holes 4 of the inner barrel 3 needs to consider the overlapping area of the "phase matching window", and the maximum hole density (up to 100 - 150 holes per square meter) is designed in this area for efficient docking with the air flow field of the outer barrel 2.

[0090] 2.3. Aerodynamic principle and working mechanism The core function of the ventilation holes 4 in the inner barrel 3 is to construct a "negative pressure suction area" by using the pressure difference with the outer barrel 2. That is, when the air flow enters the inner barrel 3 from the air outlet holes of the outer barrel 2 at high speed and impacts or slides past the orifices of the ventilation holes 4 in the inner barrel 3, a low-pressure area is locally formed at the orifice, inducing the internal air flow to accelerate further and enhancing the conversion of wind kinetic pressure.

[0091] Since the moment of inertia of the inner barrel 3 is relatively small, the response speed of its ventilation holes 4 under the action of the air flow is higher, and it is easy to form an initial starting torque. After the outer barrel 2 starts, the ventilation holes 4 in the inner barrel 3 are continuously cut by the air flow to form a stable vortex structure (vortex band) to maintain the rotating state.

[0092] If combined with the Venturi structure, the air flow velocity in the hole is increased by 30% - 70% compared with the free flow field, significantly enhancing the aerodynamic kinetic torque. At the same time, the micro-perturbed flow structure at the orifice of the ventilation holes 4 in the inner barrel 3 can interrupt the laminar attachment and avoid the air flow back pressure at the orifice, making the energy utilization more sufficient.

[0093] 2.4. Manufacturing Process and Material Selection The processing of the ventilation holes 4 in the inner barrel 3 requires high precision and durability requirements, and the following methods can be used: 2.4.1. CNC Precision Drilling: Suitable for barrel bodies made of metal materials (such as aluminum alloy, stainless steel), and can be formed in one step; 2.4.2. Composite Material Molding and Holing: Suitable for carbon fiber / glass fiber reinforced barrel bodies, and through holes are prefabricated in the molding process; 2.4.3. Laser Micro Machining: Suitable for high-performance small prototypes, and can adapt to complex hole shapes and micro-perturbed flow structures; 2.4.4. Inner Layer Insert Socket Design: Insert inner plug with holes in the interlayer of the inner barrel 3, which is convenient for maintenance and upgrade.

[0094] In terms of materials, the inner barrel 3 can be made of high-strength lightweight composite materials (such as glass fiber reinforced resin, carbon fiber laminate, etc.). The edge area of the orifice needs to be locally thickened or structurally strengthened to improve the anti-wind pressure fatigue performance. In some high-performance designs, a wear-resistant ceramic layer can be pasted at the orifice or a low-friction coating (such as fluorocarbon coating) can be applied to extend the service life.

[0095] 2.5. Analysis of the Synergistic Effect with the Outer Barrel 2 The ventilation holes 4 of the inner barrel 3 and the ventilation holes 4 of the outer barrel 2 form a multi-stage air flow channel system, and its core lies in the organic combination of the "inner suction + outer guidance" mechanism: the inclined ventilation holes 4 of the outer barrel 2 provide directional high-pressure air flow, which is absorbed and further accelerated by the straight holes of the inner barrel 3 to form a pressure difference coupling; the design of adjacent orifices facing each other makes the fluid motion have a spiral guiding trend, which helps to maintain rotational stability; when the inner and outer holes are misaligned, a staggered flow channel is formed, improving the adaptability of the device at different wind speeds; combined with the double-barrel phase adjustment structure, dynamic wind field tracking of the holes of the inner barrel 3 can be realized, effectively expanding the wind speed window of power generation efficiency.

[0096] 3. Differential connection and central rotating shaft 1 The central rotating shaft 1 supports the inner and outer barrels through a two-way bearing system; the outer barrel 2 can be connected to the central rotating shaft 1 through a flange; the inner barrel 3 is directly fixed to the central rotating shaft 1 through a flange.

[0097] 4. Phase adjustment mechanism A rotating adjustment ring or sleeve coupling is arranged between the outer barrel 2 and the inner barrel 3; the initial angle between the ventilation holes 4 of the two can be adjusted manually or by a servo motor; multiple misalignment methods such as 90°, 135°, 180° are supported to meet different starting and operating strategies at different wind speeds.

[0098] Part Two, Working Principle and Operation Method 1. Starting stage (low wind speed) When the wind enters the device, it first acts on the inclined diversion holes of the outer barrel 2; after the air flow direction changes and accelerates, it impacts the wall of the inner barrel 3; the misalignment of the inner and outer barrel holes by 90° helps to reduce the impact resistance of the air flow and improve the starting sensitivity; the outer barrel 2 starts to rotate slowly due to the unbalanced lateral air pressure, driving the inner barrel 3 or the central rotating shaft 1 to rotate synchronously.

[0099] 2. Operating stage (medium and high wind speeds) The misalignment of the holes of the inner and outer barrels can be adjusted to 180° to achieve the strongest impact effect; the diversion holes of the outer barrel 2 guide the high-speed air flow to impact the Venturi holes of the inner barrel 3, enhancing the negative pressure area; a powerful torque is generated by the superposition effect of the hole shape difference and pressure difference between the inner and outer barrels; the rotation of the inner and outer barrels drives the central rotating shaft 1 to rotate continuously and efficiently; the generator 6 converts the shaft kinetic energy into electrical energy and outputs a stable current through the control system.

[0100] 3. High wind speed protection When it exceeds the set threshold (such as 18 m / s), the phase adjustment mechanism automatically misaligns to a non-optimal state; at the same time, the V-shaped spoiler 5 enhances the air flow disturbance, reduces the effective ventilation volume of the air flow, and reduces the torque; the braking mechanism (such as an electromagnetic brake or a wind resistance plate) starts to limit the speed to ensure the safety of the system.

[0101] Part Three, Coordination Adjustment Scheme of Inner Barrel and Outer Barrel 3.1. Overall design idea In wind power generation, under different wind speeds, wind directions and load conditions, the pneumatic matching relationship between the inner barrel 3 and the ventilation holes 4 of the outer barrel 2 directly affects the wind energy conversion efficiency. If they are fixedly connected, they cannot adapt to environmental changes, affecting the applicability and efficient operation of the device. Therefore, the present invention proposes an adjustable cooperative structure between the inner barrel 3 and the outer barrel 2, which realizes the optimal pressure difference coupling state under different working conditions through mechanical phase adjustment, orifice alignment optimization and intelligent control strategies.

[0102] The core objectives are: adjusting the relative phase relationship (misalignment angle) between the ventilation holes 4 of the outer barrel 2 and the inner barrel 3; adjusting the rotational speed difference and torque linkage response between the two barrels; and adapting to the pneumatic requirements of different wind speeds (especially low wind speed startup and high wind speed steady state).

[0103] 3.2. Structural mechanism design 3.2.1. Dual-barrel relative rotation mechanism Central rotating shaft 1: runs through the centers of the two barrels and connects to the rotor of the generator 6; the central rotating shaft 1 supports the inner barrel 3 and the outer barrel 2 respectively through a bearing system, enabling them to have independent rotation capabilities.

[0104] Inner barrel 3 linkage collar: The inner barrel 3 is fixed to the central rotating shaft 1 through an axial connecting piece or can selectively lock the central rotating shaft 1 through an electromagnetic clutch.

[0105] Outer barrel 2 independent slip ring bearing system: The outer barrel 2 is installed on the central rotating shaft 1 but is separated from the inner barrel 3. An adjustment drive ring is provided at its lower part, which can drive the outer barrel 2 to rotate relative to the inner barrel 3.

[0106] 3.2.2. Phase adjustment actuator There is a special phase adjustment gear ring-rack device or a small stepping motor drive mechanism to control the rotation angle (misalignment angle θ) of the outer barrel 2 relative to the inner barrel 3. The adjustment range is 0° to 360°, and the accuracy is not less than 1°. The typical control strategies are as follows: When the wind speed is relatively low (<3 m / s), the orifice misalignment angle θ is set to 45° to 90° to reduce direct wind resistance and improve the starting rotation ability; when the wind speed is medium (3–7 m / s), it is set to 90° to 135° to enhance the pressure difference driving ability; when the wind speed is high (>7 m / s), it is set to 180° alignment to increase the pneumatic energy input per unit time and ensure the maximum torque output.

[0107] This embodiment can also use a centrifugal limit device for passive adjustment to automatically increase the misalignment angle under high wind speed conditions to avoid overload.

[0108] 3.2.3. Linkage control method 3.2.3.1. Passive linkage adjustment (passive) Passive adjustment is carried out by using a passive spring mechanism. When the dynamic pressure of the air flow in the outer barrel 2 increases, the spring is compressed, and the relative angle of the outer barrel 2 is automatically adjusted. The set differential spring mechanism is driven by the wind pressure difference. When the dynamic pressure of the air flow in the outer barrel 2 increases, the spring is compressed, and the outer barrel 2 is automatically pushed to deflect a certain angle relative to the inner barrel 3; the control system is simplified and no power supply is required, which is suitable for field self-powered occasions.

[0109] 2. Active collaborative control (active) A wind speed sensor (a wind vane can be optionally configured) is set to monitor the incoming wind parameters in real time; a microprocessor is used to analyze the data and drive a stepper motor or a servo motor to perform a rotation adjustment action; a feedback encoder is provided to record the current phase angle to achieve closed-loop adjustment control.

[0110] This method is suitable for scenarios with an intelligent power generation system and can be dynamically optimized and adjusted in cooperation with the MPPT strategy and the power generation power curve.

[0111] 3.2.4. Linkage mechanism of the rotational speed difference between the inner and outer barrels (enhancing pneumatic responsiveness) Differential gear coupling mechanism: The inner and outer barrels are connected to the main shaft through a variable ratio speed gear pair, so that when the wind speed changes, the rotational speed difference between the two is controlled within the optimized range (Δω). For example, it is set that the rotational speed of the inner barrel 3 is 1.2 - 1.5 times that of the outer barrel 2 to expand the dynamic pressure change range; Or a magnetic coupling flywheel system is used. The rotational coupling strength is adjusted through magnetic resistance, so that the linkage tightness of the two barrels is automatically adjusted with the wind speed to maintain stable drive.

[0112] 3.2.5. Pneumatic adaptability analysis and application scenario matching Through the phase adjustment system, the device can be adapted to the following typical scenarios: Table 1 Phase adjustment angles under different wind conditions:

[0113] 3.2.6. Manufacturing and structural materials The double-barrel body uses glass fiber reinforced thermosetting composite material (GFRP), taking into account light weight, high strength, wind erosion resistance and forming accuracy; the gear ring, bearing and driving parts in the adjustment mechanism are made of high-strength engineering plastics or stainless steel; a sealing and dust-proof protective cover is provided outside the overall structure to prevent dust particles from interfering with the normal operation of the adjustment device.

[0114] Part Four. Suggestions on material selection Table 2 Material selection table

[0115] The present invention constructs a multi-stage pressure difference and air flow path through a dual-barrel heterogeneous ventilation structure, effectively improving the pneumatic driving force. It has the ability to adaptively adjust the wind speed and is suitable for various complex wind fields. The inner and outer barrels work together to form a "differential torque", with higher utilization rate. It supports the vertical axis arrangement method and has a wide range of applicable scenarios. It adopts advanced composite materials to reduce the rotational inertia and improve the response sensitivity, and can be connected to intelligent modules such as wind speed detection, AI control, and remote monitoring.

[0116] Compared with the existing traditional single-wind-wheel horizontal-axis wind power generation device: The wind energy utilization efficiency of the present invention is improved. Since the present invention adopts a dual-barrel structure, each barrel is provided with inclined ventilation holes 4, and the natural wind flow is guided into the barrel through a wind guiding device, and the barrel is driven to rotate by using the positive and negative pressure difference. Theoretical analysis shows that under the conventional wind condition with a wind speed of 5–8 m / s, the wind energy capture efficiency per unit frontal area can be increased by 15%~25%, which is significantly better than the traditional three-blade wind wheel structure of the same size. In addition to the dual-barrel structure, the present embodiment can also adopt a multi-barrel dual-barrel structure and a linkage structure to drive the barrel to rotate.

[0117] The present invention has strong low-wind-speed starting ability. The dual-barrel design brings a larger wind-loading area, and the structure of the ventilation holes 4 can form a local acceleration effect at a lower wind speed, enabling the device to have a lower starting wind speed (the experimental prototype test is 2.2 m / s), which is better than the common starting wind speed threshold of 3.5~4 m / s for traditional wind turbines 6, effectively expanding the available wind energy time window.

[0118] The present invention has a compact structure and strong adaptability. The overall device adopts a method of equidistantly distributing multiple hollow barrels along the horizontal rotating shaft, does not rely on a large-diameter wind wheel, so it has a small floor area, a simple structure, and a high degree of modularization. It is particularly suitable for deployment in areas with limited space or difficult transportation such as deserts, islands, and mountains to achieve distributed wind power generation.

[0119] The operation stability and wind resistance of the present invention are improved. The dual-barrel parallel structure has the natural characteristic of mass symmetric distribution, which can effectively reduce the vibration caused by single-point load. The simulation and experimental results show that under the gust condition of 10 m / s, the rotational speed fluctuation range of each barrel is controlled within ±6%, which is better than the common rotational speed fluctuation problem of ±12%~15% of traditional wind wheel devices, improving the operation stability of the system and the smoothness of the generated power.

[0120] The manufacturing and maintenance costs of the present invention are reduced. The barrel can be batch-manufactured by using lightweight and high-strength composite materials (such as glass fiber-reinforced polymer), with simple assembly, convenient transportation and installation. At the same time, since each barrel module is independently replaceable, the maintenance process does not affect the overall system operation, improving the maintainability and economy of the system.

[0121] In summary, the present invention not only makes innovative breakthroughs different from the prior art in terms of structural design and wind energy utilization method, but also exhibits excellent technical advantages in terms of wind energy utilization efficiency, starting performance, stability and system adaptability, and has good practical value and promotion prospects.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-rotating barrel wind power generation device driven by wind pressure difference, characterized in that It includes a central rotating shaft, an outer barrel and an inner barrel. The central rotating shaft is used to support and link the inner barrel and the outer barrel, and the central rotating shaft is connected to the generator rotor. The outer barrel is a hollow cylindrical structure, which is fixed on the outer circle of the central rotating shaft. The barrel wall of the outer barrel is provided with ventilation holes of an inclined diversion type, and the ventilation holes are biased towards the air flow direction. The inner barrel is a hollow cylindrical structure, which is sleeved on the central rotating shaft and coaxial with the outer barrel. The barrel wall of the inner barrel is provided with ventilation holes that are straight or inwardly inclined and guided. Some of the ventilation holes on the inner barrel adopt a contraction-expansion type Venturi tube structure. The aperture of the ventilation holes on the outer barrel is larger than that of the ventilation holes on the inner barrel.

2. The multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 1, characterized in that, It further includes a phase adjustment mechanism, which is used to dynamically adjust the relative phase angle of the ventilation holes of the outer barrel and the inner barrel.

3. The multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 2, wherein, The control strategy of the phase adjustment mechanism is as follows: When the low wind speed is < 3 m / s, the misalignment angle is set to 45° - 90°; When the medium wind speed is 3 - 7 m / s, the misalignment angle is set to 90° - 135°; When the high wind speed is > 7 m / s, the misalignment angle is set to 180°.

4. The multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 1, wherein It further includes an eddy current generating assembly, which includes V-shaped spoiler fins arranged at the edges of the ventilation holes on the outer barrel and micro-convex rib line structures of the ventilation holes on the inner barrel.

5. The multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 2, characterized in that, It further includes a braking and safety device, which activates electromagnetic braking or wind resistance piece speed limiting when the wind speed exceeds 18 m / s, and at the same time increases the misalignment angle through the phase adjustment mechanism to reduce the torque.

6. The multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 1, characterized in that, The ventilation holes on the outer barrel are arranged in an asymmetric spiral ring belt type, and the ventilation holes spiral upward along the barrel body of the outer barrel by 20° - 45°.

7. The multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 1, wherein A wear-resistant ceramic layer is pasted or a low-friction resistance coating is coated on the orifice area of some of the ventilation holes on the inner barrel, and the ventilation holes are arranged to form an asymmetric spiral ring belt, and the spiral upward angle of the asymmetric spiral ring belt is 20° - 45°.

8. The method for using the multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 2, characterized in that, It includes the following steps: Startup stage, low wind speed < 3 m / s: Set the misalignment angle of the ventilation holes of the outer barrel and the inner barrel to 45° - 90° through the phase adjustment mechanism, use the inclined diversion holes of the outer barrel to guide the airflow to impact the inner barrel, reduce the startup resistance, and make the outer barrel rotate first and drive the central rotating shaft; Operation stage, medium and high wind speed 3 - 7 m / s: Adjust the misalignment angle to 90° - 135°, and through the pressure difference coupling of the diversion holes of the outer barrel and the Venturi holes of the inner barrel, enhance the negative pressure suction area and drive the inner and outer barrels to rotate synchronously; High wind speed protection stage, > 7 m / s: Set the misalignment angle to 180°, and at the same time start the braking device to limit the speed, and enhance the airflow disturbance through the eddy current spoiler fins to reduce the effective ventilation volume.

9. The method of using the multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 8, characterized in that The phase adjustment mechanism monitors the wind speed in real time through a wind speed sensor, and is driven by a microprocessor to drive the servo motor to perform dynamic adjustment, forming a closed-loop control, and the adjustment accuracy is not less than 1°.

10. The method of using the multi-rotating barrel wind power generation device driven by wind pressure difference according to claim 8, characterized in that, The V-shaped spoiler fins of the ventilation holes on the outer barrel create eddy currents when the airflow passes through, breaking the boundary layer to increase the dynamic pressure, and the micro-convex rib line structures of the ventilation holes on the inner barrel enhance the airflow stability through shear disturbance.

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