One-way air guide device and vertical axis wind turbine

Abstract

The utility model discloses a one -way air -guiding device and vertical axis breeze generator, including multiple wind blades that are arranged and are linked in the circumferential direction and multiple air -guiding blades that are fixed distribution in the circumferential direction, and air -guiding blade concentric arrangement is in the outer periphery of wind blade, air -guiding blade has air -guiding surface and wind -blocking surface, and air -guiding blade is arranged obliquely relative to the mounting plane, and multiple air -guiding blades are arranged in the circumferential direction and are spaced, and each air -guiding surface guides the airflow of the same clock direction to each wind blade concave surface, and each wind -blocking surface blocks the airflow in another clock direction outside the wind blade. The utility model realizes one -way air -guiding function, under the effect of air -guiding device, and wind blade will only receive the airflow force of one -way, and will not appear the force of opposite direction and offset, so that generator can start under breeze condition smoothly, and the starting wind speed is lower, and the power generation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, specifically to a unidirectional wind guide device and a vertical axis micro wind generator including such a unidirectional wind guide device. 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] Under the actual working conditions of wind turbines, the wind direction or airflow direction outdoors is often changing at any time and the wind direction is uncontrollable. Therefore, wind turbines need to meet the requirements of multi-directional wind guidance in order to achieve efficient power generation in practice.

[0004] However, multi-directional airflow guidance of wind turbine blades presents a problem: when both sides of the blades are exposed to wind simultaneously, the forces cancel each other out due to the simultaneous clockwise and counterclockwise rotational tendencies. This causes the blades to start in light winds, hindering the power generation efficiency of the wind turbine and making it difficult for the blades to start in light conditions. Although some devices now incorporate air ducts to guide airflow into the blades, the airflow guidance effect is still not ideal. Alternatively, while dense air ducts can achieve some airflow guidance, they also significantly reduce the amount of air entering the equipment, which is also detrimental to power generation in light winds and is unsuitable for small micro-wind generators. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a unidirectional wind-guiding structure, and the other is to provide a vertical axis micro wind generator including such a unidirectional wind-guiding structure, which can solve the problem of difficulty in starting the blades of existing wind turbines due to multidirectional forces.

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

[0007] A one-way airflow device includes: a plurality of fan blades arranged and linked along a circumferential direction; each fan blade is an arc-shaped blade and includes a concave surface and a convex surface; each fan blade is oriented in the same circumferential direction; a plurality of guide vanes are fixedly distributed along the circumferential direction, the guide vanes being concentrically arranged on the outer circumferential direction of the fan blades; each guide vane has a guide surface and an opposing wind-blocking surface, the guide surface being used to guide airflow toward the guide surface to the concave surface of the fan blade, and the wind-blocking surface being used to block airflow toward the guide surface from the guide vane; the guide vanes are inclined relative to the mounting plane, and the plurality of guide vanes are spaced apart along the circumferential direction so that each guide surface together guides airflow in the same clockwise direction to the concave surface of each fan blade, and each wind-blocking surface blocks all airflow in the other clockwise direction from the fan blade.

[0008] Furthermore, the guide vane is an arc-shaped blade, the guide surface is a concave surface, and the windproof surface is a convex surface; the curvature of the guide surface is suitable for guiding airflow to the concave surface of the blade; when the blade rotates to a position close to the guide vane, the end of the guide surface near the center is close to the end of the concave surface of the blade away from the center, and the guide vane and the blade together form an S-shaped structure.

[0009] Furthermore, the tilt angle of the guide vane relative to the horizontal axis of the mounting plane is 40° to 70°.

[0010] Furthermore, the unidirectional airflow device also includes an upper fixed plate and a lower fixed plate arranged opposite to each other; the upper end and the lower end of the airflow guide vane are respectively fixedly connected to the upper fixed plate and the lower fixed plate; the upper fixed plate, the lower fixed plate and the airflow guide vane together enclose a cylindrical cavity, and the airflow guide vane is rotatably disposed within the cylindrical cavity.

[0011] Furthermore, the unidirectional airflow device also includes: a support side pipe; the upper and lower ends of the support side pipe are respectively fixed to the upper fixed plate and the lower fixed plate, and the airflow guide vanes are arranged in the gap between the support side pipes.

[0012] Furthermore, the one-way airflow device also includes: a fan blade drive component, a fan blade rotation shaft, and a one-way bearing; each fan blade is fixedly connected to the fan blade drive component, and the fan blade drive component is fixedly connected to the fan blade rotation shaft; a one-way bearing is sleeved on the fan blade rotation shaft, and is rotatably connected to the upper fixed plate and / or the lower fixed plate through the one-way bearing, so that the fan blade rotation shaft can only rotate in a single clockwise direction.

[0013] Furthermore, the one-way wind guide device further includes: an upper fixed frame for the wind turbine and a lower fixed frame for the wind turbine; the upper fixed frame for the wind turbine is fixedly connected to the upper fixed plate, and the lower fixed frame for the wind turbine is fixedly connected to the lower fixed plate; the upper end of the wind turbine rotation shaft is connected to the upper fixed frame for the wind turbine via the one-way bearing, and / or, the lower end of the wind turbine rotation shaft is connected to the lower fixed frame for the wind turbine via the one-way bearing.

[0014] Furthermore, the fan blade drive component is a drive wheel, and a plurality of fan blades are circumferentially fixed on the outer side of the drive wheel.

[0015] Furthermore, there are two drive wheels, which are distributed in a vertical direction; the fan blades are fixed to both drive wheels.

[0016] A vertical axis micro wind generator, the vertical axis micro wind generator including the aforementioned unidirectional wind guide device.

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

[0018] When a fan blade is subjected to airflow from different directions, the guide vanes, by their contours, direct the airflow towards the guide vanes to the concave surface of the fan blades, while the deflector vanes, by their contours, block the airflow towards the deflector vanes. Thus, multiple guide vanes arranged circumferentially and at an angle can guide all airflow in the same clockwise direction to the concave surface of the fan blades, allowing the fan blades to rotate along that airflow direction. Simultaneously, the guide vanes' guide surfaces can block all airflow in the opposite clockwise direction, preventing it from acting on the fan blades.

[0019] Thus, this invention achieves a one-way airflow function. Under the action of the airflow guiding device, the fan blades will only be subjected to the airflow force in one direction, and there will be no force cancellation in the opposite direction, which allows the generator to start smoothly under light wind conditions, with a lower starting wind speed and improved power generation efficiency. Attached Figure Description

[0020] Figure 1 The image shown is a perspective view of the entire utility model.

[0021] Figure 2 As shown Figure 1 Top view;

[0022] Figure 3 The diagram shown is a schematic of the air guide structure of this utility model;

[0023] Figure 4 The diagram shows the relationship between the guide vane and the fan blade.

[0024] Figure 5 As shown Figure 1 Sectional view along the AA direction;

[0025] Figure 6 As shown Figure 5 A magnified view of a section at point B in the middle;

[0026] Figure 7 The diagram shows the connection of the upper fixed plate, the upper fixed frame of the wind turbine, the one-way bearing, and the wind turbine rotation shaft.

[0027] Figure 8 The diagram shows the connection between the fan blade drive component, the fan blade rotation shaft, and the fan blade.

[0028] In the diagram: 10. Fan blade; 11. Concave surface of the fan blade; 12. Convex surface of the fan blade; 20. Guide vane; 21. Guide surface; 22. Windshield surface; 30. Upper fixed plate; 40. Lower fixed plate; 50. Support side tube; 60. Fan blade drive component; 70. Fan blade rotation shaft; 80. One-way bearing; 90. Upper fixed frame of the impeller; 100. Lower fixed frame of the impeller. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] This utility model discloses a unidirectional wind-guiding device, which can be applied to a vertical axis micro wind generator. (See reference...) Figures 1-4 This unidirectional airflow device includes fan blades 10 and guide vanes 20. Multiple fan blades 10 are evenly arranged along the circumference, and all fan blades 10 rotate in conjunction with each other. (See reference...) Figure 4 The fan blade 10 is an arc-shaped blade, which includes a concave surface 11 and a convex surface 12; see reference. Figure 3 Each fan blade 10 faces the same circumferential direction, for example, in Figure 3 In one embodiment, the fan blades 10 are uniformly oriented in a clockwise direction. There are also multiple guide vanes 20, which are evenly distributed along the circumference; each guide vane 20 and each fan blade 10 are arranged concentrically, wherein the guide vanes 20 are located on the outer circumference of the fan blades 10.

[0034] See Figure 4 The guide vane 20 has a guide surface 21 and a deflector surface 22 opposite to the guide surface 21. The guide surface 21 directs airflow toward the guide surface 21 to the concave surface 11 of the vane, and the airflow acting on the concave surface 11 can drive the vane 10 to rotate. In another direction, the deflector surface 22 blocks the airflow toward the guide surface 21 from the guide vane 20. (See reference...) Figure 3 The guide vanes 20 are arranged at an angle relative to the mounting plane. Multiple guide vanes 20 are arranged at intervals along the circumferential direction. Thus, relying on the angle of the guide vanes 20 and their own outline shape, the guide vanes 20 arranged at an angle in the circumferential direction can guide the airflow in the same clockwise direction (such as counterclockwise direction) to the concave surface 11 of each fan blade 10. At the same time, the airflow in another clockwise direction (such as clockwise direction) is blocked on the guide vanes 20 to prevent the airflow in that direction from entering the internal fan blade 10.

[0035] For example, in Figure 3In one specific embodiment, when the fan blade 10 is subjected to airflow in both clockwise and counterclockwise directions, the guide surface 21 on the guide vane 20 guides the counterclockwise airflow to the concave surface 11 of the fan blade 10, causing the fan blade 10 to rotate counterclockwise. Simultaneously, the windbreak surface 22 blocks the clockwise airflow outside the guide vane 20, preventing it from acting on the fan blade 10. Thus, the fan blade 10 is not subjected to force in the clockwise direction and rotates smoothly in the counterclockwise direction, thereby providing rotational power to the generator and creating conditions for power generation.

[0036] Thus, this utility model achieves a one-way airflow function. Under the action of this airflow device, the fan blade 10 will only be subjected to the airflow force in a single clockwise direction, and there will be no force cancellation in the opposite direction, so that the generator can start smoothly under light wind conditions, the equipment starts with a lower wind speed, and the power generation efficiency is higher.

[0037] Preferably, see Figure 4 The guide vane 20 specifically adopts an arc-shaped blade; the guide surface 21 is a concave surface, and the wind-blocking surface 22 is a convex surface; the curvature and shape of the guide surface 21 are suitable for guiding airflow onto the concave surface 11 of the blade. When the blade 10 rotates to a position close to the guide vane 20, the end of the guide surface 21 near the center is close to the end of the concave surface 11 away from the center, at which point the guide vane 20 and the blade 10 together form an S-shaped structure. Through this structure, when the blade 10 rotates to a position close to the end of the guide vane 20, the connection and transition between the guide vane 20 and the blade 10 is smooth, which is conducive to guiding as much airflow as possible onto the blade 10, achieving a sufficient airflow guiding effect.

[0038] Preferably, see Figure 3 The tilt angle of the guide vane 20 relative to the horizontal axis of the mounting plane (ground) can be between 40° and 70°. This angle range is conducive to the guide vane 20 and the fan blade 10 forming a good combination, thereby guiding the larger air volume in the counterclockwise direction to the concave surface 11 of the fan blade, while achieving a sufficient blocking effect on the wind in the clockwise direction.

[0039] Preferably, see Figure 5 The unidirectional airflow device also includes an upper fixed plate 30 and a lower fixed plate 40 arranged opposite to each other. The upper and lower ends of the guide vane 20 are fixedly connected to the upper fixed plate 30 and the lower fixed plate 40, respectively. The upper fixed plate 30, the lower fixed plate 40, and the guide vane 20 together form a cylindrical cavity, and the fan blade 10 is rotatably disposed inside this cylindrical cavity. Thus, the external airflow must first pass through the external guide vane 20 before entering the internal fan blade 10.

[0040] Further preferred, see Figure 3The present invention also includes a support side tube 50, which serves as a support and connector between the upper and lower discs. The upper and lower ends of the support side tube 50 are respectively fixed to the upper fixed plate 30 and the lower fixed plate 40, and the guide vanes 20 are arranged in the gap between the support side tubes 50.

[0041] Simply improving the airflow direction is insufficient for complete unidirectional (e.g., clockwise) wind blocking in practical applications. This is because wind blows randomly from various directions, and some air often leaks in from the blocked direction (clockwise). Preferably, see [reference needed]. Figures 5-7 This utility model also includes a fan blade drive component 60, a fan blade rotation shaft 70, and a one-way bearing 80. Each fan blade 10 is fixedly connected to the fan blade drive component 60, and the fan blade drive component 60 is fixedly connected to the fan blade rotation shaft 70. The one-way bearing 80 is sleeved on the fan blade rotation shaft 70 and is rotatably connected to the upper fixed plate 30 and the lower fixed plate 40 through the one-way bearing 80. When the wind enters from the wind-guiding direction (e.g., counterclockwise), the fan blade 10 drives the fan blade drive wheel to rotate, thereby driving the fan blade rotation shaft 70 to rotate, providing power to the generator. At the same time, when a small amount of wind enters from the wind-blocking direction (e.g., clockwise), the one-way bearing 80 locks in the clockwise direction, preventing the fan blade 10 from rotating in the clockwise direction. There is no force cancellation on the fan blade 10, thus achieving a completely one-way wind-guiding effect.

[0042] Preferably, see Figures 5-7 This utility model also includes an upper fixing frame 90 and a lower fixing frame 100 for the wind turbine. The upper fixing frame 90 is fixedly connected to the upper fixing plate 30, and the lower fixing frame 100 is fixedly connected to the lower fixing plate 40. The upper end of the wind turbine rotation shaft 70 is connected to the upper fixing frame 90 via a one-way bearing 80, and the lower end of the wind turbine rotation shaft 70 is also connected to the lower fixing frame 100 via a one-way bearing 80, thereby completely locking the wind turbine rotation shaft 70 in the clockwise direction.

[0043] Preferably, see Figure 8 The fan drive component 60 is specifically a drive wheel, and each fan blade 10 is circumferentially fixed on the outer side of the drive wheel, thereby driving the drive wheel to rotate. More specifically, there are two drive wheels, which are distributed in a vertical direction, and the fan blades 10 are fixed on the outer circumference of both the upper and lower drive wheels.

[0044] This utility model also discloses a vertical axis micro wind generator, including the aforementioned unidirectional wind guide device. Any vertical axis micro wind generator that uses the same or substantially the same unidirectional wind guide device should be within the protection scope of this utility model.

[0045] 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 one-way airflow device, characterized in that, include: Multiple fan blades arranged and linked along the circumference; The fan blade is an arc-shaped blade, and includes a concave surface and a convex surface; the orientation of each fan blade is the same circumferential direction; Multiple guide vanes are fixedly distributed along the circumference, and the guide vanes are concentrically arranged on the outer circumference of the fan blades; The guide vane has a guide surface and an opposing wind-blocking surface. The guide surface is used to guide the airflow toward the guide surface to the concave surface of the vane, and the wind-blocking surface is used to block the airflow toward the guide surface on the guide vane. The guide vanes are arranged at an angle relative to the mounting plane, and multiple guide vanes are arranged at intervals along the circumference so that each guide surface guides the airflow in the same clockwise direction to the concave surface of each vane, and each windproof surface blocks the airflow in the other clockwise direction from the vane.

2. The unidirectional airflow device as described in claim 1, characterized in that, The guide vane is an arc-shaped blade, the guide surface is a concave surface, and the windproof surface is a convex surface; the curvature of the guide surface is suitable for guiding the airflow to the concave surface of the blade. When the fan blade rotates to a position close to the guide vane, the end of the guide surface near the center is close to the end of the fan blade's concave surface away from the center, and the guide vane and the fan blade together form an S-shaped structure.

3. The unidirectional airflow device as described in claim 1, characterized in that, The tilt angle of the guide vane relative to the horizontal axis of the mounting plane is 40° to 70°.

4. The unidirectional airflow device as described in claim 1, characterized in that, The unidirectional airflow device further includes an upper fixed plate and a lower fixed plate arranged opposite to each other; the upper end and the lower end of the airflow guide vane are respectively fixedly connected to the upper fixed plate and the lower fixed plate; the upper fixed plate, the lower fixed plate and the airflow guide vane together enclose a cylindrical cavity, and the airflow guide vane is rotatably disposed in the cylindrical cavity.

5. The unidirectional airflow device as described in claim 4, characterized in that, The unidirectional airflow device further includes: a support side pipe; the upper and lower ends of the support side pipe are respectively fixed to the upper fixed plate and the lower fixed plate, and the airflow guide vanes are arranged in the gap between the support side pipes.

6. The unidirectional airflow device as described in claim 4, characterized in that, The one-way airflow device further includes: a fan blade drive component, a fan blade rotation shaft, and a one-way bearing; each fan blade is fixedly connected to the fan blade drive component, and the fan blade drive component is fixedly connected to the fan blade rotation shaft; a one-way bearing is sleeved on the fan blade rotation shaft, and is rotatably connected to the upper fixed plate and / or the lower fixed plate through the one-way bearing, so that the fan blade rotation shaft can only rotate in a single clockwise direction.

7. The unidirectional airflow device as described in claim 6, characterized in that, The unidirectional wind guide device further includes: an upper wind turbine fixing frame and a lower wind turbine fixing frame; the upper wind turbine fixing frame is fixedly connected to the upper fixing plate, and the lower wind turbine fixing frame is fixedly connected to the lower fixing plate; The upper end of the wind turbine's rotating shaft is connected to the fixed frame on the wind turbine via the one-way bearing, and / or the lower end of the wind turbine's rotating shaft is connected to the fixed frame on the wind turbine via the one-way bearing.

8. The unidirectional airflow device as described in claim 6, characterized in that, The fan blade drive component is a drive wheel, and multiple fan blades are circumferentially fixed on the outer side of the drive wheel.

9. The unidirectional airflow device as described in claim 8, characterized in that, The number of drive wheels is two, and they are distributed in a vertical direction; the fan blades are fixed to both drive wheels.

10. A vertical axis micro wind generator, characterized in that, The vertical axis micro wind generator includes a unidirectional wind guide device as described in any one of claims 1 to 9.

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