Blade deformation prevention structure and vertical axis wind turbine

Abstract

The utility model discloses a kind of wind blade anti-deformation structure and vertical axis breeze generator, comprising: wind blade, wind blade driving part and hoop assembly. Among them, wind blade is evenly distributed in circumferential direction, wind blade driving part is used to drive wind blade to make rotary motion around rotating plane, hoop assembly is closed in circumferential direction, and fixed on the outer periphery of each wind blade, to be connected into a stable whole by each wind blade surrounding closure.When wind blade is subjected to strong wind action, the elastic deformation force of wind blade can be transmitted to hoop, and the force on hoop can form a direction of superimposed force, and then boost the rotation of wind blade, and the elastic deformation force of wind blade is all transferred to hoop assembly. The utility model avoids the problem that wind blade is easily deformed under the action of strong airflow under the premise of ensuring that wind blade is light and thin, and at the same time, the elastic deformation force of wind blade can also be added to boost the force, so that the rotation of wind blade is more smooth, and the power generation efficiency of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, specifically to a wind blade anti-deformation structure, and a vertical axis micro wind generator including such a wind blade anti-deformation structure. Background Technology

[0002] Wind turbines can be mainly divided into two categories: horizontal axis wind turbines and vertical axis wind turbines. Vertical axis wind turbines are those whose rotor axis is perpendicular to the ground or the mounting plane. Vertical axis wind turbines are characterized by their compact structure, flexibility in adapting to wind direction changes, and low starting wind speed, enabling them to start up even in low winds and achieve power generation in light winds.

[0003] To better enable low-wind start-up, existing vertical axis wind turbines typically feature rounded blades to increase the contact area between the blades and the airflow, allowing the airflow to exert sufficient thrust on the blades. Furthermore, the blades are usually made of lightweight materials with thin walls, which facilitates start-up in low-wind conditions. However, this also results in weaker bending resistance, making them prone to deformation over prolonged operation. Deformed blades not only affect stable power generation but also incur maintenance costs upon replacement.

[0004] Currently, in the field of micro wind generators, the conventional methods to prevent wind blade deformation are: (1) making concave and convex reinforcing ribs on both sides of the wind blade, but the manufacturing process is relatively complicated and the wind blade processing cost is expensive; (2) increasing the wall thickness of the wind blade to enhance its strength and anti-deformation effect, but this will greatly increase the weight of the wind blade, and the wind blade will not be easy to rotate under low wind speed conditions, which is not conducive to the generator starting in a light wind condition. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a wind blade anti-deformation structure, and the other is to provide a vertical axis micro wind generator including such a wind blade anti-deformation structure, which can solve the problem that the wind blades of existing vertical axis micro wind generators are easily deformed, thus affecting the stable power generation of the equipment.

[0006] This utility model is achieved through the following technical solution:

[0007] A fan blade anti-deformation structure includes: multiple fan blades arranged circumferentially, each fan blade being vertically mounted on the equipment mounting plane; a rotatably mounted fan blade drive component, which is simultaneously fixedly connected to each of the fan blades to drive each fan blade to rotate; and a clamping assembly, which is closed in the circumferential direction and fixed to the outer periphery of each fan blade to enclose and connect each fan blade; the number of clamping assemblies is several rings; when the number of clamping assemblies is two or more rings, the clamping assemblies are distributed in the vertical direction.

[0008] Furthermore, the clamp assembly includes multiple clamp connecting members; each clamp connecting member has its two ends fixedly connected to two adjacent fan blades, and the clamp connecting members are connected end to end in the circumferential direction to form a closed clamp assembly; or, the clamp assembly is an integrally formed ring or polygonal piece, and the inner side of the clamp assembly is simultaneously fixed to the outer side of each fan blade.

[0009] Furthermore, the fan blade is an arc-shaped fan blade with an arc-shaped cross-section; the clamp connecting component includes: two arc-shaped connecting pieces and a long condition, the two ends of the long condition being fixedly connected to the two arc-shaped connecting pieces respectively; the two arc-shaped connecting pieces are respectively fixedly attached to two adjacent fan blades, with one arc-shaped connecting piece fixedly attached to the outer surface of a fan blade and the other arc-shaped connecting piece fixedly attached to the inner surface of a fan blade.

[0010] Furthermore, the anti-deformation structure of the fan blade also includes a plurality of fastening screws; the fan blade is provided with a fixing through hole, and the two ends of the clamp connecting member are detachably fixed to the fan blade by the fastening screws, or the inner side of the clamp assembly is fixed to the fan blade by the fastening screws.

[0011] Furthermore, the clamp assembly is made of lightweight, rust-resistant material.

[0012] Furthermore, the clamp assembly is made of stainless steel or aluminum alloy.

[0013] Furthermore, the fan blade drive component is a circular drive wheel, and each fan blade is circumferentially fixed on the outer side of the drive wheel so that the drive wheel drives the fan blade to rotate in a circular motion.

[0014] Furthermore, the drive wheel includes an upper drive wheel and a lower drive wheel arranged coaxially in a vertical direction; the fan blade is connected to the outer periphery of both the upper drive wheel and the lower drive wheel.

[0015] Furthermore, the anti-deformation structure of the wind blade also includes: a connecting central shaft; both ends of the connecting central shaft are simultaneously connected to the upper drive wheel and the lower drive wheel.

[0016] A vertical axis micro wind generator, the vertical axis micro wind generator including the aforementioned blade anti-deformation structure.

[0017] Compared with existing technologies, the beneficial effects that this utility model can achieve are as follows:

[0018] Previously, individual wind turbine blades were relatively independent. When subjected to airflow, especially in strong winds, the lightweight and thin-walled blades were prone to deformation. In this technical solution, the individual blades are connected and enclosed in the outer circumference by a clamp assembly, making the blades a stable whole. When the blades are subjected to strong winds, the elastic deformation force of the blades is transferred to the clamp, and the force on the clamp forms a superimposed force in one direction, which in turn promotes the rotation of the blades. Ultimately, all the elastic deformation force of the blades is transferred to the clamp assembly.

[0019] Therefore, this invention, while ensuring the lightweight and thin-walled nature of the fan blades, avoids the problem of deformation under strong airflow, ensuring stable rotation of the blades and maintaining stable voltage generated by the equipment. Simultaneously, the elastic deformation forces generated by each blade can be superimposed as a booster force, making the blade rotation smoother and improving the power generation efficiency of the equipment. Attached Figure Description

[0020] Figure 1 The image shown is a perspective view of this utility model;

[0021] Figure 2 The image shown is a front view of this utility model;

[0022] Figure 3 The image shown is a top view of this utility model;

[0023] Figure 4 The diagram shown is a structural schematic of the clamp assembly;

[0024] Figure 5 The diagram shows the connection relationship between the fan blade and the clamp assembly.

[0025] Figure 6 As shown Figure 5 A magnified view of a portion of point A in the middle.

[0026] In the diagram: 10, fan blade; 20, clamp assembly; 21, clamp connecting component; 211, arc-shaped connector; 212, long section; 30, fastening screw; 40, fan blade drive component; 50, connecting shaft. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] This utility model discloses a wind turbine blade anti-deformation structure, which can be applied to vertical axis wind turbines. (See reference...) Figures 1-3 This anti-deformation structure for wind turbine blades includes: wind turbine blades 10, wind turbine drive components 40, and clamping assembly 20. Multiple wind turbine blades 10 are evenly distributed at certain intervals along their circumference; the wind turbine blades 10 are installed perpendicular to the ground or the generator mounting plane. The wind turbine drive components 40 are rotatably mounted and fixedly connected to each wind turbine blade 10, used to drive each wind turbine blade 10 to rotate around a plane of rotation. (See reference...) Figures 4-6The clamp assembly 20 is closed in the circumferential direction and fixed to the outer periphery of each fan blade 10, thereby enclosing and connecting each fan blade 10 into a stable whole. The number of clamp assemblies 20 can be single (single coil), two, or more, depending on the size and mechanical requirements of the fan blade 10. When the number of clamp assemblies 20 is two or more, they are distributed vertically. For example, in one embodiment shown in the figure, there are two clamp assemblies 20 arranged vertically.

[0032] The clamp assembly 20 can be a split structure or an integrated structure. (See reference...) Figure 4 When the clamp assembly 20 adopts a split structure, the clamp assembly 20 specifically includes a plurality of clamp connecting members 21. The two horizontal ends of each clamp connecting member 21 are fixed to two adjacent fan blades 10 respectively. The clamp connecting members 21 are connected end to end in the circumferential direction, so that the clamp connecting members 21 together form a closed clamp assembly 20. The split structure allows for individual installation and connection on the side of the fan blades 10, without the need for top-down or bottom-up interlocking, making the installation work more labor-saving and convenient.

[0033] Of course, the clamp assembly 20 can also be a one-piece molded ring or polygonal piece, with the inner side of the clamp assembly 20 simultaneously fixed to the outer side of each fan blade 10. For example, when there are nine fan blades 10, the clamp assembly 20 can be a nonagonal piece; the one-piece structure has the characteristics of structural stability and more stable force and force transmission.

[0034] Previously, each fan blade 10 was relatively independently installed. When subjected to airflow, especially in strong winds, the lightweight and thin-walled fan blades 10 were prone to deformation. In this technical solution, the fan blades 10 are connected and enclosed in the outer circumferential direction by the clamp assembly 20, making the fan blades 10 a stable whole. When the fan blades 10 are subjected to strong winds, the elastic deformation force of the fan blades 10 is transmitted to the clamp, and the force on the clamp forms a superimposed force in one direction, which in turn promotes the rotation of the fan blades 10. Finally, all the elastic deformation force of the fan blades 10 is transferred to the clamp assembly 20.

[0035] Therefore, this invention, while ensuring the lightweight and thin-walled nature of the fan blade 10 (without adding reinforcing ribs or increasing the wall thickness), avoids the problem of the fan blade 10 easily deforming under strong airflow, ensuring that the fan blade 10 rotates stably and the voltage generated by the equipment remains stable. At the same time, the elastic deformation forces generated by each fan blade 10 can be superimposed as a booster force, making the rotation of the fan blade 10 smoother and improving the power generation efficiency of the equipment.

[0036] See Figures 4-6 When the clamp assembly 20 adopts a split structure, preferably, the fan blade 10 adopts an arc-shaped fan blade 10 structure, that is, the cross-sectional shape of the fan blade 10 is arc-shaped. Correspondingly, the clamp connecting member 21 specifically includes two arc-shaped connecting pieces 211 and a long piece 212 located in the middle connection position; the two ends of the long piece 212 are respectively fixedly connected to the arc-shaped connecting pieces 211 at both ends; the two arc-shaped connecting pieces 211 are respectively fixedly attached to two adjacent fan blades 10, that is, the arc-shaped connecting piece 211 on one side is fixedly attached to the outer surface of one fan blade 10, and the arc-shaped connecting piece 211 on the other side is fixedly attached to the inner surface of the adjacent fan blade 10. In this way, the clamp connecting member 21 achieves a stable connection between the two adjacent fan blades 10.

[0037] Preferably, see Figure 5 and Figure 6 This utility model also includes a plurality of fastening screws 30 for fastening the clamp assembly 20 and the fan blade 10. The fan blade 10 has a fixing through hole. When the clamp connecting member 21 is a split structure, both ends of the clamp connecting member 21 are detachably fixed to the fan blade 10 by fastening screws 30; or, when the clamp assembly 20 is an integral structure, the inner side of the clamp assembly 20 is fixed to the outer side of the fan blade 10 by fastening screws 30.

[0038] The clamp assembly 20 is preferably made of lightweight, rust-resistant material. This lightweight material results in a negligible weight for the clamp assembly 20, minimizing its impact on the rotation of the wind turbine blade 10. The rust-resistant properties ensure the wind turbine can operate outdoors for extended periods. More specifically, the clamp assembly 20 can be made of stainless steel or aluminum alloy, or other known lightweight, rust-resistant materials.

[0039] Preferably, see Figure 1 and Figure 3 The fan blade drive component 40 is a circular drive wheel, and each fan blade 10 is evenly fixed on the outer side of the drive wheel, thereby causing the drive wheel to drive each fan blade 10 to rotate in a circular motion. Furthermore, since the fan blade 10 has a certain length (height), in order to stably drive the fan blade 10 to rotate, there are two drive wheels, including an upper drive wheel and a lower drive wheel arranged coaxially in the vertical direction, and each fan blade 10 is simultaneously connected to the outer periphery of the upper drive wheel and the lower drive wheel.

[0040] More preferably, the present invention further includes a connecting central shaft 50, with an upper drive wheel and a lower drive wheel connected to its upper and lower ends, respectively. When airflow acts on the fan blades 10, the fan blades 10 drive the drive wheels to rotate, thereby causing the connecting central shaft 50 to rotate. The connecting central shaft 50 serves as the input shaft of the generator, providing kinetic energy to the generator and creating the conditions for power generation.

[0041] This utility model also discloses a vertical axis micro wind generator, including the aforementioned blade anti-deformation structure. Any vertical axis micro wind generator that employs the same or substantially the same blade anti-deformation structure should be within the protection scope of this utility model.

[0042] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A wind turbine blade anti-deformation structure, characterized in that, include: Multiple fan blades are arranged circumferentially, and all fan blades are vertically arranged on the equipment mounting plane; A rotatable fan blade drive component is provided, which is simultaneously fixedly connected to each of the fan blades to drive each of the fan blades to rotate. A clamp assembly, which is closed in the circumferential direction and fixed to the outer periphery of each of the fan blades to enclose and connect each of the fan blades; The number of clamp components is several turns; when the number of clamp components is two or more turns, the clamp components are distributed in a vertical direction.

2. The wind turbine blade anti-deformation structure as described in claim 1, characterized in that, The clamp assembly includes multiple clamp connecting members; each clamp connecting member is fixedly connected at both ends to two adjacent fan blades, and the clamp connecting members are connected end to end in the circumferential direction to form a closed clamp assembly. Alternatively, the clamp assembly may be an integrally formed ring or polygonal piece, with the inner side of the clamp assembly simultaneously fixed to the outer side of each of the fan blades.

3. The wind turbine blade anti-deformation structure as described in claim 2, characterized in that, The fan blade is an arc-shaped fan blade, and the cross-sectional shape of the fan blade is arc-shaped; The clamp connecting component includes: two arc-shaped connecting parts and a long condition, the two ends of which are fixedly connected to the two arc-shaped connecting parts respectively; The two arc-shaped connectors are respectively fixedly attached to two adjacent fan blades. One arc-shaped connector is fixedly attached to the outer surface of a fan blade, and the other arc-shaped connector is fixedly attached to the inner surface of a fan blade.

4. The wind turbine blade anti-deformation structure as described in claim 2, characterized in that, The anti-deformation structure of the fan blade also includes multiple fastening screws; the fan blade is provided with a fixing through hole, and the two ends of the clamp connecting member are detachably fixed to the fan blade by the fastening screws, or the inner side of the clamp assembly is fixed to the fan blade by the fastening screws.

5. The wind turbine blade anti-deformation structure as described in claim 1, characterized in that, The clamp assembly is made of lightweight, rust-resistant material.

6. The wind turbine blade anti-deformation structure as described in claim 5, characterized in that, The clamp assembly is made of stainless steel or aluminum alloy.

7. The wind turbine blade anti-deformation structure as described in claim 1, characterized in that, The fan blade drive component is a circular drive wheel, and each fan blade is circumferentially fixed on the outer side of the drive wheel so that the drive wheel drives the fan blade to rotate in a circular motion.

8. The wind turbine blade anti-deformation structure as described in claim 7, characterized in that, The drive wheel includes an upper drive wheel and a lower drive wheel arranged coaxially in a vertical direction; the fan blade is connected to the outer periphery of both the upper drive wheel and the lower drive wheel.

9. The wind turbine blade anti-deformation structure as described in claim 8, characterized in that, The anti-deformation structure of the wind turbine blades further includes: a connecting shaft; both ends of the connecting shaft are simultaneously connected to the upper drive wheel and the lower drive wheel.

10. A vertical axis micro wind generator, characterized in that, The vertical axis micro wind turbine includes the blade anti-deformation structure as described in any one of claims 1 to 9.

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