A sail-type wind-blocking transmission device for a vertical-axis wind turbine

Abstract

The present disclosure provides a sail-type wind blocking transmission device for a vertical-axis wind turbine, which relates to the technical field of wind power generation. The device includes: a transmission shaft; a transmission connection device arranged at one end of the transmission shaft for connecting the transmission shaft and the vertical-axis wind turbine to transmit the positive torque on the transmission shaft to the vertical-axis wind turbine; a sail-type wind blocking assembly arranged at the end of the transmission shaft far from the transmission connection device for capturing the wind energy driving force in the air and converting it into a positive torque acting on the transmission shaft; wherein, the sail-type wind blocking assembly opens when facing the wind, and the sail-type wind blocking assembly closes when facing the opposite wind. In this technical solution, the sail-type wind blocking assembly that opens when facing the wind or closes when facing the opposite wind can reduce the generation of reverse torque, improve the wind energy utilization coefficient of the vertical-axis wind turbine, and improve the power generation efficiency; at the same time, the structure is simpler, the manufacturing cost is lower, the failure rate is lower, the maintenance cost is lower, and it is easier to install and maintain.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wind power generation, and particularly to a sail-type wind blocking and transmission device for a vertical-axis wind turbine. Background Art

[0002] A wind turbine is a power device that converts wind energy into mechanical work. The mechanical work drives a rotor to rotate, and finally outputs alternating current. Wind turbines are mainly divided into two categories: one is a horizontal-axis wind turbine, in which the wind wheel rotates around a horizontal axis, the wind wheel axis is parallel to the wind direction, the blades on the wind wheel are radially installed and perpendicular to the rotation axis. It has a high wind energy utilization rate during high-speed operation, but requires a high wind speed to start, and the blades are subject to alternating loads during rotation. The generator is placed at a high altitude, making installation, maintenance and repair inconvenient; the other is a vertical-axis wind turbine, in which the wind wheel rotates around a vertical axis, and the wind wheel axis is perpendicular to the wind direction. The advantage is that it can accept wind from any direction. When the wind direction changes, there is no need to set the direction facing the wind. The stress condition of the wind wheel blades during rotation is better, and the fatigue life is long. The generator can be placed below the wind wheel or on the ground, which is convenient for installation and maintenance.

[0003] Currently, vertical-axis wind turbines mainly rely on the resistance of the wind to the blades to drive the wind wheel to rotate. When the wind wheel rotates, the wind force directions and magnitudes received by the blades at different positions are different. Related vertical-axis resistance-type wind turbines either have a low wind energy utilization coefficient or have a complex mechanical structure and a high failure rate. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a sail-type wind blocking and transmission device 1 for a vertical-axis wind turbine, which can effectively improve the wind energy utilization coefficient and power generation efficiency; at the same time, simplify the structure and reduce the manufacturing cost and maintenance cost.

[0005] Additional aspects and advantages of the present disclosure will be partially described below, and partially will become apparent from the description, or can be learned through the practice of the present disclosure.

[0006] According to one aspect of the present disclosure, there is provided a sail-type wind blocking and transmission device for a vertical-axis wind turbine, including: a transmission shaft; a transmission connection device provided at one end of the transmission shaft for connecting the transmission shaft and the vertical-axis wind turbine to transmit the positive torque on the transmission shaft to the vertical-axis wind turbine; a sail-type wind blocking assembly provided at the end of the transmission shaft far from the transmission connection device for capturing the wind energy driving force in the air and converting it into a positive torque acting on the transmission shaft; wherein, the sail-type wind blocking assembly opens when facing the wind, and the sail-type wind blocking assembly closes when facing the wind against the wind.

[0007] According to one embodiment of the present disclosure, the sail-type wind-blocking assembly includes: a keel, including a fixed end and a free end, the fixed end is fixedly connected to the transmission shaft, and the free end extends in a direction away from the transmission shaft; a hanging column, the hanging column is partially fixed on a connecting member, the connecting member includes the keel and / or a connecting column fixed on the transmission shaft; a flexible blade, at least partially fixedly connected to the keel, and at least the portion away from the keel is fixedly connected to the hanging column.

[0008] According to one embodiment of the present disclosure, the diameter of the fixed end of the keel is larger than the diameter of the free end, and the diameter of the keel gradually decreases from the fixed end to the free end.

[0009] According to an embodiment of the present disclosure, the free end of the keel is bent toward one side, and the bending direction of the free end is opposite to the direction of the positive torque.

[0010] According to one embodiment of the present disclosure, the flexible blade is composed of a first blade and a second blade, and the first blade and the second blade are triangular in shape; one side of the first blade and the second blade is fixedly connected to the keel, and a corner of the first blade and the second blade away from the keel is respectively hung at both ends of the hanging column.

[0011] According to one embodiment of the present disclosure, when the flexible blade faces the wind, the first blade and the second blade are relatively opened, and cooperate with the keel and the hanging column to form a wind-blocking cavity, and the flexible blade captures the wind energy driving force in the air through the wind-blocking cavity, and converts the wind energy driving force into a positive torque acting on the transmission shaft through the keel; and when the flexible blade faces against the wind, the first blade and the second blade are at least partially in contact with each other, and are streamlined like bird wings with the keel as a whole, and the parts of the first blade and the second blade close to the hanging column form a windward cavity with the hanging column, and the windward cavity is used to block the wind and open the first blade and the second blade when the first blade and the second blade rotate to the windward side.

[0012] According to one embodiment of the present disclosure, the first blade and the second blade are provided with a windward edge on the side away from the keel, and the material hardness of the windward edge is greater than the material hardness of the first blade and the second blade; wherein, the angle between the windward edge and the plane where the blade is located is greater than 0° and less than 90°, and when the flexible blade is closed against the wind, the cross-section of the windward edge of the first blade and the second blade forms a V-shape.

[0013] According to one embodiment of the present disclosure, the number of the sail-type wind-blocking assemblies is at least four, and the at least four sail-type wind-blocking assemblies are evenly or unevenly distributed along the radial direction of the transmission shaft.

[0014] According to an embodiment of the present disclosure, at least four of the sail-type wind blocking components are in the same plane; and / or at least four of the sail-type wind blocking components are in different planes respectively and are arranged in sequence along the axial direction of the transmission shaft.

[0015] According to an embodiment of the present disclosure, at least four of the sail-type wind blocking components in the same plane are taken as a group, and at least two groups of the sail-type wind blocking components are arranged on the transmission shaft.

[0016] It can be seen from the above technical solutions that the present disclosure has at least one of the following advantages and positive effects:

[0017] In the sail-type wind blocking transmission device for a vertical-axis wind turbine provided in the embodiment of the present disclosure, the transmission connection device is directly connected to the transmission shaft and the vertical-axis wind turbine, which can simplify the connection structure between the transmission shaft and the vertical-axis wind turbine and reduce the intermediate transmission loss; the sail-type wind blocking components arranged on the transmission shaft capture the wind energy driving force in the air and convert it into a positive torque acting on the transmission shaft, and since the sail-type wind blocking components can open when facing the wind and close when facing the opposite wind, it can effectively avoid the reduction of the wind energy utilization coefficient caused by the two-way force of the traditional resistance-type wind turbine, thereby improving the wind energy utilization coefficient of the sail-type wind blocking transmission device and the power generation efficiency of the vertical-axis wind turbine; in addition, since the sail-type wind blocking components can close when facing the opposite wind, it can reduce the generation of turbulent airflows and vortices, avoid the consumption of wind energy by the sail-type wind blocking components, improve the absorption of wind energy by the sail-type wind blocking components, and further improve the wind energy utilization efficiency; furthermore, compared with the traditional plate blades, the sail-type wind blocking components are lighter in material, lower in cost, longer in service life, simpler in mechanical structure, lower in failure rate, and can effectively reduce the manufacturing cost, installation cost and maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By describing its exemplary embodiments in detail with reference to the drawings, the above and other features and advantages of the present disclosure will become more obvious.

[0019] Figure 1 is a three-dimensional structural schematic diagram of the sail-type wind blocking transmission device for a vertical-axis wind turbine in the first embodiment of the present disclosure.

[0020] Figure 2 is a three-dimensional structural schematic diagram of the sail-type wind blocking component in the state of opening when facing the wind in some embodiments of the present disclosure.

[0021] Figure 3 is a three-dimensional structural schematic diagram of the sail-type wind blocking component in the state of closing when facing the opposite wind in some embodiments of the present disclosure.

[0022] Figure 4It is a three-dimensional structural schematic diagram of the sail-type wind-blocking transmission device for a vertical-axis wind turbine in the second embodiment in the present disclosure.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the sail-type wind-blocking transmission device for a vertical-axis wind turbine in the third embodiment in the present disclosure.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the sail-type wind-blocking transmission device for a vertical-axis wind turbine in the fourth embodiment in the present disclosure.

[0025] The descriptions of the main element reference numerals in the figure are as follows:

[0026] 1. Sail-type wind-blocking transmission device; 2. Transmission shaft; 3. Transmission connection device; 4. Sail-type wind-blocking assembly; 41. Keel; 411. Fixed end; 412. Free end; 42. Hanging post; 421. Connecting post; 43. Flexible blade; 431. First blade; 432. Second blade; 433. Windward edge. Specific embodiments

[0027] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0028] The features, structures, or characteristics described above can be combined in any suitable manner in one or more embodiments. If possible, the features discussed in each embodiment are interchangeable. In the above description, many specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, materials, etc. can be adopted. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0029] The present disclosure provides a sail - type wind - blocking transmission device for a vertical - axis wind turbine. This sail - type wind - blocking transmission device can be installed on a vertical - axis wind turbine to capture wind energy and provide positive torque to the vertical - axis wind turbine, thereby achieving wind power generation. In this scenario, the vertical - axis wind turbine can be installed below the ground or above the ground, and this embodiment is not limited thereto. Those skilled in the art can easily understand that through structural modifications, the sail - type wind - blocking transmission device in this embodiment can also be installed on a horizontal - axis wind turbine. For example, the sail - type wind - blocking transmission device can be rotated to face the wind, so as to provide positive torque to the horizontal - axis wind turbine to achieve wind power generation, which is also within the protection scope of this embodiment.

[0030] Specifically, the sail - type wind - blocking transmission device for a vertical - axis wind turbine can at least include a transmission shaft, a transmission connection device, and a sail - type wind - blocking component. Among them, the transmission connection device can be arranged at one end of the transmission shaft to connect the transmission shaft and the vertical - axis wind turbine, so as to transmit the positive torque on the transmission shaft to the vertical - axis wind turbine; the sail - type wind - blocking component is arranged at the end of the transmission shaft far from the transmission connection device, and is used to capture the wind - energy driving force in the air and convert it into positive torque acting on the transmission shaft; among them, the sail - type wind - blocking component can open when facing the wind, and the sail - type wind - blocking component can close when facing against the wind.

[0031] By directly connecting the transmission shaft and the vertical - axis wind turbine through the transmission connection device, the connection structure between the transmission shaft and the vertical - axis wind turbine can be simplified, and the intermediate transmission loss can be reduced; since the sail - type wind - blocking component can open when facing the wind and close when facing against the wind, it can effectively avoid the reduction of the wind - energy utilization coefficient caused by bidirectional stress in traditional resistance - type wind turbines, thereby improving the wind - energy utilization coefficient of the sail - type wind - blocking transmission device and enhancing the power - generation efficiency of the vertical - axis wind turbine; in addition, since the sail - type wind - blocking component can close when facing against the wind, the generation of turbulent airflow and eddy currents can be reduced, avoiding the consumption of wind energy by the sail - type wind - blocking component and enhancing the absorption of wind energy by the sail - type wind - blocking component, further improving the wind - energy utilization efficiency; furthermore, compared with traditional plate - type blades, the sail - type wind - blocking component is lighter in weight, lower in cost, longer in service life, simpler in mechanical structure, lower in failure rate, effectively reducing the manufacturing cost, installation cost, and maintenance cost.

[0032] Next, in combination with Figures 1 to 6 the sail - type wind - blocking transmission device for a vertical - axis wind turbine in the embodiments of the present disclosure will be described in detail.

[0033] Referring to Figure 1 and Figures 4 to 6 shown, in an exemplary embodiment of the present disclosure, the sail - type wind - blocking transmission device 1 for a vertical - axis wind turbine in the embodiments of the present disclosure can include a transmission shaft 2, a transmission connection device 3, and a sail - type wind - blocking component 4. Among them:

[0034] The drive shaft 2 is mainly used to support and fix the sail - type wind - resistance component 4, and transfer the positive torque transmitted from the sail - type wind - resistance component 4 to a vertical - axis wind turbine or a horizontal - axis wind turbine. For example, the drive shaft 2 can be a cylinder with a constant diameter, a cylinder with a variable diameter, or other types of polygons; the drive shaft 2 can be made of high - strength and wind - erosion - resistant materials, such as metal alloys, polymer materials, etc. In this embodiment, no special limitations are imposed on the shape and material of the drive shaft 2.

[0035] The drive connection device 3 can be arranged at one end of the drive shaft 2. It is mainly used to connect the drive shaft 2 and the vertical - axis wind turbine to transfer the positive torque on the drive shaft 2 to the vertical - axis wind turbine, acting as a coupling. Its structure and implementation principle are conventional technical means for those skilled in the art, and are not described in detail in this specification and the accompanying drawings. Through the drive connection device 3, the connection between the drive shaft 2 and the vertical - axis wind turbine can be quickly realized, effectively reducing the installation and maintenance costs of the sail - type wind - resistance drive device 1.

[0036] The sail - type wind - resistance component 4 can be arranged at the end of the drive shaft 2 far from the drive connection device 3. The sail - type wind - resistance component 4 is mainly used to capture the wind - energy driving force in the air and convert it into a positive torque acting on the drive shaft 2. Among them, in the embodiment of the present disclosure, the sail - type wind - resistance component 4 can open when facing the wind and close when facing the wind. In this way, the sail - type wind - resistance component 4 can open when facing the wind and close when facing the wind, which can effectively avoid the reduction of the wind - energy utilization coefficient caused by the two - way force on the traditional resistance - type wind turbine, thereby improving the wind - energy utilization coefficient of the sail - type wind - resistance drive device 1 and increasing the power generation efficiency of the vertical - axis wind turbine. In addition, since the sail - type wind - resistance component 4 can close when facing the wind, it can reduce the generation of turbulent airflows and eddy currents, avoid the sail - type wind - resistance component 4 consuming wind energy, improve the absorption of wind energy by the sail - type wind - resistance component 4, and further improve the wind - energy utilization efficiency.

[0037] Reference Figure 2 and Figure 3 As shown in the figure, in an exemplary embodiment of the present disclosure, the sail - type wind - resistance component 4 can at least include a keel 41, a hanging post 42, and a flexible blade 43, where:

[0038] The keel 41 can include a fixed end 411 and a free end 412. The fixed end 411 can be fixedly connected to the drive shaft 2, and the free end 412 extends in a direction away from the drive shaft 2. The keel 41 can be made of materials with good stiffness and flexibility. For example, the keel 41 can be made of metal alloys, carbon fiber, or polymer materials. The overall stiffness and flexibility of the keel 41 can be kept consistent. Of course, materials with better stiffness can also be used at the fixed end 411 and materials with better flexibility can be used at the free end 412. This embodiment is not limited thereto.

[0039] The hanging post 42 can be partially fixed to the connecting member. For example, the connecting member can be the keel 41 of other sail-type wind blocking components 4, or it can be the connecting post 421 fixed to the transmission shaft 2. Of course, in some embodiments, there are multiple sail-type wind blocking components 4 provided on the transmission shaft 2. The connecting members of the hanging posts 42 of some sail-type wind blocking components 4 can be the keels 41 of other sail-type wind blocking components 4, and the connecting members of the hanging posts 42 of the remaining sail-type wind blocking components 4 can be the connecting posts 421 fixed to the transmission shaft 2. The setting of the connecting members of the hanging post 42 can be specifically customized according to the quantity and arrangement of the sail-type wind blocking components 4, and this embodiment is not limited thereto. The hanging post 42 is mainly used for assisting in supporting and fixing a part of the flexible blade 43, so that the flexible blade 43 can be converted into a corresponding shape or state when facing the wind or against the wind.

[0040] The flexible blade 43 is at least partially fixedly connected to the keel 41. For example, the flexible blade 43 can be a whole piece of flexible material, and the flexible material can be a light and wear-resistant material (such as polyester fiber + coating, and this embodiment is not limited thereto). At this time, the flexible blade 43 can be fixedly connected to the keel 41 at the side, or the keel 41 can be fixedly connected to the middle area of the flexible blade 43. Of course, the flexible blade 43 can also be spliced by multiple pieces of flexible material. At this time, a part of some flexible blades 43 is connected to the keel 41, and this embodiment is not limited thereto. At least a part of the flexible blade 43 far from the keel 41 is fixedly connected to the hanging post 42. For example, taking the flexible blade 43 as a whole piece of flexible material as an example, when the flexible blade 43 is fixedly connected to the keel 41 at the side, at least one corner of it far from the keel 41 can be fixedly connected to the hanging post 42. When it is fixedly connected to the keel 41 in the middle area, at least two corners of it far from the keel 41 can be fixedly connected to the hanging post 42, so as to form a stable sail structure.

[0041] With the sail - type wind - blocking component 4 composed of the keel 41, the hanging post 42 and the flexible blade 43, the wind - blocking structure is simpler. Compared with traditional plate - type blades, it is lighter in material, lower in cost, longer in service life, simpler in mechanical structure, and lower in failure rate, effectively reducing the manufacturing cost, installation cost and maintenance cost. Among them, the structure of the keel 41 with one end fixed and the other end freely extending can ensure that the flexible blade 43 can form an effective wind - blocking area when facing the wind, improving the wind - energy capture ability. At the same time, the setting of the free end 412 enables the sail - type wind - blocking component 4 to adapt to more complex airflows, reducing the material fatigue of the sail - type wind - blocking component 4 and enhancing the service life of the sail - type wind - blocking component 4. The setting of the hanging post 42 enhances the wind - facing stability of the flexible blade 43, avoiding excessive deformation or damage due to the action of wind force, and can also assist in realizing the state switching of the flexible blade 43 between the wind - facing deployment and the wind - opposite closing state, ensuring the effectiveness and stability of the state switching. The use of the flexible blade 43 can simplify the structure while realizing closing when facing the wind, reducing the generation of turbulent airflows and vortices, avoiding the consumption of wind energy by the sail - type wind - blocking component 4, enhancing the absorption of wind energy by the sail - type wind - blocking component 4, and effectively improving the wind - energy utilization efficiency.

[0042] In an alternative embodiment of the present disclosure, referring to Figures 1 to 6 As shown, the diameter of the fixed end 411 of the keel 41 can be larger than the diameter of the free end 412, and the diameter of the keel 41 gradually decreases from the fixed end 411 to the free end 412.

[0043] The keel 41 can be an integrally formed fixed keel 41. For example, the keel 41 can be a conical structure with a continuously and uniformly varying diameter. For instance, the diameter of the fixed end 411 is 60 mm, the diameter of the free end 412 is 10 mm, and the diameter in the middle region gradually and continuously transitions from 60 mm to 10 mm. The relatively thick fixed end 411 can ensure that the keel 41 can withstand a large wind impact and avoid structural instability caused by excessive torque. The smaller diameter of the free end 412 can reduce air resistance, improve the rotational flexibility of the sail-type wind blocking component 4, enable the blade to respond more quickly to wind direction changes in complex weather, reduce the fatigue of the keel 41, and the conical and freely extending keel 41 can concentrate the wind force on the more distal end when the blade unfolds, improving the torque output efficiency. Of course, the keel 41 can also be a segmented cylindrical structure with a gradually varying diameter. For example, the diameter of the first segment near the fixed end 411 is 60 mm, and its length accounts for 30% of the total length of the keel 41. The diameter of the second segment is 40 mm, and its length accounts for 40% of the total length of the keel 41. The diameter of the third segment near the free end 412 is 20 mm, and its length accounts for 30% of the total length of the keel 41. This segmented structure can enable the fixed end 411 to bear the main torque, the middle segment serves as a transition, and the free end 412 can respond flexibly to wind direction changes, improving durability. In a high wind speed environment, the fixed end 411 provides stable support, and in a low wind speed environment, the free end 412 can capture wind energy more flexibly, improving energy utilization efficiency. When adopting a segmented design, the cost can be optimized through different material combinations. For example, the fixed end 411 is made of high-strength alloy steel, and the middle segment and the free end 412 are made of lightweight composite materials.

[0044] The keel 41 can also be a dynamically adjustable keel 41. For example, the keel 41 can also be a telescopic keel 41, and its free end 412 consists of multiple telescopic sleeves. The diameter can be adjusted through spring buckles or screws, which can be determined according to the scenario set by the sail-type wind blocking transmission device 1. For example, in a low wind speed environment, the diameter of the free end 412 of the keel 41 can be adjusted to increase, improving the wind energy capture ability; in a high wind speed environment, the diameter of the free end 412 of the keel 41 is adjusted to decrease, reducing the turbulence resistance and preventing structural overload. This dynamically adjustable keel 41 structure can optimize the wind energy conversion efficiency in different wind speed environments, expand the applicable range of the device, and improve the maintainability and adaptability of the device.

[0045] Optionally, the shape of the cross-sectional area of the keel 41 can be asymmetric. For example, the diameter or thickness on the windward side is greater than that on the leeward side. This design can enable the keel 41 to improve the force-bearing ability when facing the wind and reduce air resistance when facing the wind. By adopting a differential structure, while reducing material waste, the strength of the keel 41 can be maintained, making the keel 41 more streamlined, further reducing air resistance, and improving power generation efficiency.

[0046] It should be noted that the design of the parameters of the keel 41 in this embodiment is only a schematic example. The specific parameter design needs to be determined in combination with the specific application scenario and the size of the sail-type wind-blocking transmission device 1, and this does not impose any special limitations on this example embodiment.

[0047] Optionally, the free end 412 of the keel 41 is bent toward one side, and the bending direction of the free end 412 is opposite to the direction of the positive torque. For example, the fixed end 411 of the keel 41 can be perpendicular to the transmission shaft 2, or can be inclined at a certain angle; and the free end 412 is bent at a fixed angle (such as 10°~60°) to the side away from the rotation direction, such as in a sail-type wind-blocking component 4 that rotates clockwise, the free end 412 of the keel 41 can be bent at a certain angle (such as 10°~60°, such as 30°, 45°) in the counterclockwise direction; of course, the keel 41 can also be bent at a continuously changing angle to the side away from the rotation direction, rather than a sudden change in a fixed angle, such as in the last 30%~50% of the length of the keel 41, the bending angle gradually changes from 0° to a maximum of any angle value of 15°~25°, 25°~45° or 45°~60°, and the bending shape can be an arc or a gradual curve to optimize aerodynamic performance.

[0048] By making the bending direction of the free end 412 of the keel 41 opposite to the positive torque, the flexible blades 43 can better capture wind energy when facing the wind, improve the wind resistance effect, and ensure that the torque can be smoothly transmitted to the transmission shaft 2 after being affected by the wind; at the same time, this curved structure can form a streamlined structure similar to a bird's wing with the flexible blades 43 when facing against the wind, which can effectively reduce wind resistance, make the flexible blades 43 easier to close, reduce energy loss, and avoid disturbing the airflow to form vortices, thereby affecting the wind resistance effect of other sail-type wind-blocking components 4.

[0049] In an optional embodiment of the present disclosure, reference Figure 2As shown, the flexible blade 43 can be composed of a first blade 431 and a second blade 432. The shapes of the first blade 431 and the second blade 432 can be symmetrical or asymmetrical. Taking the case where the shapes of the first blade 431 and the second blade 432 are symmetrical as an example, their shapes are generally approximately triangular. For example, the shapes of the first blade 431 and the second blade 432 can be a triangle-like shape with both sides having a certain bending arc towards the outside, forming a larger wind resistance area. And the acute angles of the first blade 431 and the second blade 432 are arranged on one side of the free end 412 of the keel 41. In this way, it can cooperate with the keel 41. When closing against the wind, the first blade 431 and the second blade 432 cooperate with the keel 41 to form a streamlined shape similar to a bird's wing, effectively reducing the wind resistance of the sail-type wind resistance component 4 against the wind, reducing the possible negative torque generated, thereby improving the wind energy utilization coefficient and the power generation efficiency of the vertical axis wind turbine. At the same time, with the triangular-like setting, the acute angles of the first blade 431 and the second blade 432 can be directly fixed to the free end 412 of the keel 41. Compared with the rectangular shape setting, no additional fixing components are required, reducing the weight of the sail-type wind resistance component 4. Of course, the shapes of the first blade 431 and the second blade 432 can also be isosceles triangles, which can be customized according to the actual situation. The triangular-like shape setting of the first blade 431 and the second blade 432 in this exemplary embodiment is not specifically limited.

[0050] One side of the first blade 431 and the second blade 432 is fixedly connected to the keel 41, and one corner of the first blade 431 and the second blade 432 far from the keel 41 is respectively hung on both ends of the hanging post 42. For example, one side of the first blade 431 and the second blade 432 can be directly fixedly connected to the keel 41 by gluing, or the one side of the first blade 431 and the second blade 432 can be fixedly connected to the keel 41 by means of tying wires, screws, clamping parts, etc. This exemplary embodiment is not limited thereto. One corner of the first blade 431 and the second blade 432 far from the keel 41 can adopt a rotatable hanging structure. For example, a movable connecting piece, such as a flexible hinge, can be arranged on the hanging post 42. One corner of the first blade 431 and the second blade 432 far from the keel 41 can be directly fixedly connected to the movable connecting piece on the hanging post 42, so that the first blade 431 and the second blade 432 can smoothly rotate and unfold when facing the wind or smoothly close when against the wind, improving the wind energy capture efficiency and at the same time reducing the wear of the first blade 431 and the second blade 432 during the movement process.

[0051] Optionally, when the flexible blades 43 face the wind, the first blades 431 and the second blades 432 are relatively open, so as to cooperate with the keel 41 and the hanging column 42 to form a larger wind-blocking cavity. The flexible blades 43 can capture the wind energy driving force in the air through the wind-blocking cavity formed when they are unfolded to face the wind, and convert the wind energy driving force into a positive torque acting on the transmission shaft 2 through the keel 41; and, when the flexible blades 43 face against the wind, the first blades 431 and the second blades 432 are at least partially in contact with each other (such as 90% of the area is in contact), and the whole is streamlined like a bird's wing with the keel 41, and a windward cavity is retained between the first blades 431 and the second blades 432 close to the hanging column 42 and the hanging column 42, and the windward cavity can be used to block the wind and open the first blades 431 and the second blades 432 when the first blades 431 and the second blades 432, which are closed to each other, rotate to the windward side.

[0052] The first blade 431, the second blade 432, the keel 41 and the hanging column 42 cooperate to form a wind-resistant cavity, so that when facing the wind, the wind energy can be fully captured, the wind energy utilization coefficient is improved, and it is effectively transmitted to the transmission shaft 2 through the keel 41; when facing against the wind, the flexible blades 43 fit together to form a streamlined structure, reduce wind resistance, and improve the adaptability of the device. When closed, the windward cavity retained between the hanging column 42 and the blade can provide additional windward support when the blade rotates to the windward side, ensuring that the blade opens quickly and improving the opening response capability of the blade.

[0053] Optionally, the first blade 431 and the second blade 432 are provided with reinforcing ribs on the sides away from the keel 41. For example, the reinforcing ribs may be steel wires with smaller diameters, or may be strips of tough material added to the outer edges of the sides of the first blade 431 and the second blade 432, and bonded to the blades along the outer edges of the sides of the first blade 431 and the second blade 432. By providing the reinforcing ribs, the first blade 431 and the second blade 432 can be prevented from being torn when they are quickly opened against the wind when the airflow is relatively strong, thereby improving the blade strength and service life of the first blade 431 and the second blade 432.

[0054] Optionally, the first blade 431 and the second blade 432 are respectively provided with a windward edge 433 on the side away from the keel 41, and the material hardness of the windward edge 433 is greater than the material hardness of the first blade 431 and the second blade 432. For example, the windward edge 433 can be obtained by folding the outer edges of the sides of the first blade 431 and the second blade 432 away from the keel 41 outward and curing them with hardened glue; of course, the windward edge 433 can also be obtained by making a hard material such as polyester fiber, polymer material, etc. into an element bent at a certain angle, bonding one side to the blade, so as to form the windward edge 433 on the blade.

[0055] Among them, the angle between the windward edge 433 and the plane where the blades are located (such as the plane where the first blade 431 and the second blade 432 are located when they are closed against the wind) is greater than 0° and less than 90°. When the flexible blade 43 is closed against the wind, the cross-sections of the windward edges 433 of the first blade 431 and the second blade 432 form a V-shape.

[0056] By designing the windward edge 433 of the flexible blade 43 with a higher hardness than the flexible blade 43, the windward rigidity of the flexible blade 43 is enhanced, and the shape stability of the flexible blade 43 when facing the wind is improved, thereby improving the wind energy capture capability; the inclination angle of the windward edge 433 and the V-shaped cross-section can increase the windward area between the closed first blade 431 and the second blade 432 when facing the wind, thereby achieving rapid opening between the first blade 431 and the second blade 432; in headwind, the V-shaped structure can make the first blade 431 and the second blade 432 fit more closely, reduce airflow disturbance, improve the streamlined performance of the sail-type wind-blocking component 4 in the headwind state, and further optimize the wind energy utilization efficiency.

[0057] In an exemplary embodiment of the present disclosure, the number of the sail-type wind-blocking components 4 is at least four, and the at least four sail-type wind-blocking components 4 are evenly or unevenly distributed along the radial direction of the transmission shaft 2. Figure 1 , Figure 5 and Figure 6 As shown, the number of sail-type wind-blocking components 4 can be 4 or 12, and of course, can also be 6, 8, or 5, 7. This exemplary embodiment does not specifically limit the number of sail-type wind-blocking components 4. By adjusting the number of sail-type wind-blocking components 4 and distributing them reasonably, wind energy can be captured more evenly and the overall wind energy utilization efficiency can be improved; even distribution can reduce the phenomenon of uneven rotation and improve the operating stability of the sail-type wind-blocking transmission device 1; uneven distribution can be optimized according to wind characteristics to improve the energy capture capability under certain wind directions.

[0058] Optional, reference Figure 4 As shown, the number of the sail-type wind-blocking components 4 can also be two, and the two sail-type wind-blocking components 4 can be distributed radially symmetrically along the transmission shaft 2 .

[0059] In an optional embodiment of the present disclosure, at least four sail-type wind-blocking components 4 are in the same plane. Figure 1 and Figure 6 As shown, at least four sail-type wind-blocking assemblies 4 are arranged in a group on the same plane, that is, each group of sail-type wind-blocking assemblies 4 is radially distributed at the same position on the transmission shaft 2. By arranging multiple sail-type wind-blocking assemblies 4 in the same plane, the wind-blocking effect when facing the wind can be maximized, and the wind energy capture capacity per unit time can be improved.

[0060] At least four sail - type wind - blocking components 4 can also be respectively in different planes and arranged in sequence along the axial direction of the transmission shaft 2. Refer to Figure 5 As shown, at least four sail - type wind - blocking components 4 are arranged in sequence along the axial direction of the transmission shaft 2. At least four sail - type wind - blocking components 4 are all in different planes, forming a spiral arrangement. By arranging multiple sail - type wind - blocking components 4 in different plane distributions, it helps to balance the torque distribution on the transmission shaft 2, reduce the impact of the wind - blocking components in a single plane on the transmission shaft 2, and improve the stability of the transmission system; at the same time, it can expand the windward area, improve the dynamic balance ability of the sail - type wind - driven device 1 and also enhance the wind energy utilization coefficient.

[0061] In an alternative embodiment of the present disclosure, at least four sail - type wind - blocking components 4 in the same plane are taken as a group, and at least two groups of sail - type wind - blocking components 4 are arranged on the transmission shaft 2. For example, Figure 1 At least four sail - type wind - blocking components 4 among them can be taken as a group, and multiple groups of sail - type wind - blocking components 4 are arranged in sequence along the axial direction on the transmission shaft 2. For example, it can be three groups, four groups, five groups or six groups, and specifically can be determined according to the length and size of the transmission shaft 2. This exemplary embodiment does not make special limitations on this. By arranging multiple groups of sail - type wind - blocking components 4, it can further improve the wind energy capture ability of the sail - type wind - driven device 1 and optimize the continuity of wind energy conversion; a certain phase difference can be formed between different groups to reduce torque fluctuations and improve the smoothness of the output positive torque and the stability of the fan operation.

[0062] It should be noted that Figure 1 、 Figure 4 、 Figure 5 and Figure 6 The number and arrangement of the sail - type wind - blocking components 4 in are only illustrative examples. In actual applications, it can be custom - set according to the application scenario. The embodiments in the drawings should not constitute any special limitations on this exemplary embodiment.

[0063] It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of the components proposed in the present disclosure. The present disclosure can have other embodiments and can be implemented and executed in various ways. The foregoing variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure extends to all alternative combinations of two or more separate features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments described in the present disclosure illustrate the best mode known for implementing the present disclosure and will enable those skilled in the art to utilize the present disclosure.

Claims

1. A sail-type wind blocking and transmission device for a vertical axis wind turbine, characterized in that, include: transmission shaft; a transmission connection device, disposed at one end of the transmission shaft, for connecting the transmission shaft and the vertical axis fan to transmit the positive torque on the transmission shaft to the vertical axis fan; A sail-type wind-blocking assembly is arranged on one end of the transmission shaft away from the transmission connection device, and is used to capture the driving force of wind energy in the air and convert it into a positive torque acting on the transmission shaft; Wherein, the sail-type wind-blocking assembly comprises: A keel, comprising a fixed end and a free end, wherein the fixed end is fixedly connected to the transmission shaft, and the free end extends in a direction away from the transmission shaft; A hanging column, wherein the hanging column is partially fixed on a connecting member, wherein the connecting member includes the keel and / or a connecting column fixed on the transmission shaft; A flexible blade, at least part of which is fixedly connected to the keel, and at least part of which is away from the keel is fixedly connected to the hanging column, the flexible blade is composed of a first blade and a second blade, the first blade and the second blade are in a triangular shape, one side of the first blade and the second blade is fixedly connected to the keel, and a corner of the first blade and the second blade away from the keel is respectively hung at two ends of the hanging column; The sail-type wind-blocking assembly is opened when facing the wind, and the sail-type wind-blocking assembly is closed when facing against the wind.

2. The sail-type wind-blocking transmission device according to claim 1, characterized in that The diameter of the fixed end of the keel is larger than the diameter of the free end, and the diameter of the keel gradually decreases from the fixed end to the free end.

3. The sail-type wind-blocking transmission device according to claim 2, characterized in that, The free end of the keel is bent toward one side, and the bending direction of the free end is opposite to the direction of the positive torque.

4. The sail-type wind-blocking transmission device according to claim 1, characterized in that: When the flexible blade faces the wind, the first blade and the second blade are relatively opened, and cooperate with the keel and the hanging column to form a wind-blocking cavity. The flexible blade captures the wind energy driving force in the air through the wind-blocking cavity, and converts the wind energy driving force into a positive torque acting on the transmission shaft through the keel; as well as When the flexible blades are facing against the wind, the first blade and the second blade at least partially fit together, forming a streamlined bird wing shape with the keel as a whole, and the parts of the first blade and the second blade close to the hanging column form a windward cavity with the hanging column, and the windward cavity is used to block the wind and spread out the first blade and the second blade when the first blade and the second blade rotate to the windward side.

5. The sail-type wind-blocking transmission device according to claim 1, characterized in that, The first blade and the second blade are provided with windward edges on the sides away from the keel, and the material hardness of the windward edges is greater than the material hardness of the first blade and the second blade; The angle between the windward edge and the plane where the blade is located is greater than 0° and less than 90°, and when the flexible blade is closed against the wind, the cross-sections of the windward edges of the first blade and the second blade form a V-shape.

6. The sail-type wind-blocking transmission device according to claim 1, characterized in that, The number of the sail-type wind-blocking components is at least four, and the at least four sail-type wind-blocking components are evenly or unevenly distributed along the radial direction of the transmission shaft.

7. The sail-type wind-blocking transmission device according to claim 6, wherein, At least four of the sail-type wind-blocking components are in the same plane; and / or At least four of the sail-type wind-blocking components are respectively in different planes and are arranged in sequence along the axial direction of the transmission shaft.

8. The sail-type wind-blocking transmission device according to claim 7, wherein, At least four of the sail-type wind-blocking components in the same plane are grouped together, and at least two groups of the sail-type wind-blocking components are arranged on the transmission shaft.

Images