A lift-drag complementary vertical axis wind power generation structure

Abstract

The utility model relates to wind power generation technical field discloses a kind of vertical axis wind power generation structures of lift-drag complement, comprising: support;Lift blade is provided with multiple, lift blade is arranged on support according to circumferential interval;Resistance blade, provided with multiple, resistance blade is arranged on support, every resistance blade is located between two adjacent lift blades, resistance blade is arranged according to circumference, the circumferential radius of resistance blade is same with the circumferential radius of lift blade, resistance blade has the wind receiving surface of drive support rotation;When wind blows to the wind receiving surface of resistance blade, resistance blade drives support to rotate, the utility model is by being arranged between two adjacent lift blades resistance blade, the rotation radius of resistance blade increases at this time, the torque produced is significantly improved, to effectively improve the capture rate and conversion efficiency of wind energy.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to a vertical axis wind power generation structure with complementary lift and drag. Background Technology

[0002] Vertical axis wind power is a technology that uses wind power to generate electricity, relying on vertical axis wind turbines. Unlike traditional horizontal axis wind turbines where the rotor shaft is parallel to the wind direction, vertical axis wind turbines have their rotor shaft perpendicular to the ground or water surface.

[0003] Chinese patent document CN102192091A discloses a split-type vertical axis wind turbine system, including: a cantilever support, lift blades and drag blades, wherein the lift blades are disposed at the outer end of the cantilever support, and the drag blades are disposed on the cantilever support near the lift blades.

[0004] However, in the existing technology, the drag blades and lift blades are set on the same cantilever support, with the lift blades set at the outermost end and the drag blades set inside the lift blades. That is, the drag blades are located in the middle of the cantilever support. The drag blades have a small rotation radius, generate little torque, and have low wind energy utilization. Utility Model Content

[0005] In view of this, the present invention provides a vertical axis wind power generation structure with complementary lift and drag to solve the problem that the drag blades in the prior art are set in the middle position of the cantilever support and generate relatively small torque.

[0006] This utility model provides a vertical axis wind power generation structure with complementary lift and drag, comprising: a support frame; multiple lift blades arranged at circumferential intervals on the support frame; and multiple drag blades arranged on the support frame, each drag blade located between two adjacent lift blades, the drag blades arranged circumferentially, the circumferential radius of the drag blades being the same as that of the lift blades, and each drag blade having a wind-receiving surface that drives the support frame to rotate; when wind blows towards the wind-receiving surface of the drag blades, the drag blades drive the support frame to rotate.

[0007] By setting drag blades between two adjacent lift blades, the rotation radius of the drag blades increases, and the torque generated is significantly improved, thereby effectively improving the wind energy capture rate and conversion efficiency.

[0008] In one alternative embodiment, the drag blade has a groove extending from one end along its length toward the other, the groove being open on the side facing away from the rotational direction of the support, the groove forming the wind-receiving surface.

[0009] By incorporating a grooved structure, not only is the wind-receiving area increased, but the aerodynamic characteristics are also optimized, further enhancing torque output. Simultaneously, the synergistic effect of the drag blades and lift blades enables efficient utilization of wind energy, significantly improving power generation efficiency.

[0010] In one optional embodiment, the resistance blade includes: a first vertical plate and a second vertical plate arranged symmetrically, the first vertical plate and the second vertical plate being vertically arranged, and the first vertical plate being fixedly connected to the second vertical plate.

[0011] By setting the drag blades as the first and second vertical plates, the structural stability is enhanced, the wind resistance is improved, and efficient operation is ensured even under strong wind conditions.

[0012] In one alternative embodiment, the horizontal cross-section of the first vertical plate and / or the second vertical plate is wavy.

[0013] By setting the first vertical plate and / or the second vertical plate to a wavy cross section, the aerodynamic performance is further optimized. At the same time, the structural improvement of the wavy structure makes the structural strength of the first and second vertical plates higher, thus maintaining efficient and stable power generation performance in complex wind field environments.

[0014] In one alternative embodiment, the connection between the first vertical plate and the second vertical plate is a circular arc transition.

[0015] By setting a circular arc transition, the airflow at the transition point is smoother when the drag blades rotate, reducing eddies and drag, and further improving rotational efficiency.

[0016] In one optional embodiment, the bracket includes: a first fixing plate having two spaced apart in a vertical direction, and a plurality of connecting arms extending outward in a horizontal direction, wherein the lift blade or the drag blade is disposed at the end of the connecting arm.

[0017] By setting up the first fixing plate and its connecting arm, the lift blades and drag blades are securely installed, enhancing the wind resistance of the overall structure.

[0018] In one optional embodiment, a vertically upward extending fastener is fixedly connected to the upper end face of the first fixing plate. The fastener is provided with a plurality of connecting members, one end of which is connected to the fastener and the other end is connected to the upper end face of the connecting arm.

[0019] By setting a fastener, one end of the connector is connected to the fastener, and the other end is connected to the upper end of the connecting arm. The connector provides multi-dimensional support to the connecting arm, further enhancing the stability of the structure.

[0020] In one alternative embodiment, the connector is provided with an adjustment component for adjusting the tightness of the connector.

[0021] By setting up adjustment components, the tightness of the connectors can be flexibly adjusted to ensure that the blades always maintain optimal working condition under different wind speeds.

[0022] In one alternative embodiment, the adjustment assembly includes a first adjustment member and a second adjustment member, the first adjustment member and the second adjustment member being threadedly connected.

[0023] By setting the first and second adjusting components to be threadedly connected, the adjustment process can be made more precise, and fine adjustments can be made according to the actual wind speed changes to ensure that the blades can maintain the optimal angle under different wind conditions.

[0024] In one alternative embodiment, the connector is detachably connected to the fixing member and the connecting arm. By making the connector detachable, it can be removed when the tension of the connecting arm does not need to be adjusted, which also facilitates transportation. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a front view of a vertical axis wind power generation structure with lift-drag complementarity according to an embodiment of the present invention.

[0027] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0028] Figure 3 for Figure 1 A 3D view of the drag blades in the diagram.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Bracket; 2. Lifting blade; 3. Drag blade; 4. Groove; 5. First vertical plate; 6. Second vertical plate; 7. First fixing plate; 8. Connecting arm; 9. Fixing component; 10. Connecting component; 11. Adjustment assembly. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.

[0033] like Figure 1 , Figure 2 , Figure 3 As shown in the embodiment of this utility model, a vertical axis wind power generation structure with complementary lift and drag is provided, including: a support 1, on which lift blades 2 and drag blades 3 are disposed; multiple lift blades 2 are disposed at circumferential intervals on the support 1; multiple drag blades 3 are disposed on the support 1, each drag blade 3 located between two adjacent lift blades 2, the drag blades 3 are circumferentially arranged, and the circumferential radius of the drag blade 3 is the same as the circumferential radius of the lift blade 2. That is, a drag blade 3 is disposed between two lift blades 2, and the circumferential radius of the lift blade 2 is the same as the circumferential radius of the drag blade 3. The drag blade 3 has a wind-receiving surface that drives the support 1 to rotate; when wind blows towards the wind-receiving surface of the drag blade 3, the drag blade 3 drives the support 1 to rotate. By placing a drag blade 3 between two adjacent lift blades 2, the rotation radius of the drag blade 3 is increased, and the generated torque is significantly improved, thereby effectively improving the wind energy capture rate and conversion efficiency.

[0034] The working principle of drag blade 3 and lift blade 2 in vertical axis wind turbines: Drag blade 3 mainly relies on the resistance generated by airflow to drive the support 1 to rotate. When wind blows towards drag blade 3, the windward side of the blade experiences greater pressure, while the leeward side experiences less pressure. This pressure difference creates a drag torque that drives the blade to rotate, thus causing the wind turbine to rotate around the vertical axis to generate electricity. Lift blade 2 operates based on the lift principle in aerodynamics. When airflow passes over lift blade 2, because the shape of lift blade 2 is usually similar to an airfoil, the airflow velocity on the upper and lower surfaces of the blade is different. According to Bernoulli's principle, the pressure is lower where the airflow velocity is higher and higher where the airflow velocity is lower, thus generating a lift force perpendicular to the airflow direction on the blade, driving the support 1 to rotate.

[0035] Specifically, the support 1 in this embodiment is the wind turbine of a vertical axis wind power generation in the prior art, and its structure will not be described in detail.

[0036] like Figure 3 As shown, in this embodiment, the drag blade 3 is arranged vertically and has a groove 4 extending from one end to the other along its length. The groove 4 is open on the side facing away from the rotation direction of the support 1, forming a wind-receiving surface. When wind blows towards the groove 4, the force-receiving area of ​​the drag blade 3 increases, further improving wind energy utilization. By setting the groove 4 structure, not only is the wind-receiving area increased, but the aerodynamic characteristics are also optimized, further improving torque output. At the same time, the synergistic effect of the drag blade 3 and the lift blade 2 achieves efficient utilization of wind energy and significantly improves power generation efficiency. It should be noted that, as an alternative implementation, the drag blade 3 may also be without the groove 4, and instead adopt a planar structure, forming the drag blade 3 by optimizing the blade shape and angle.

[0037] like Figure 3 As shown, in this embodiment, the drag blade 3 includes: a first vertical plate 5 and a second vertical plate 6 symmetrically arranged. The first vertical plate 5 and the second vertical plate 6 are vertically arranged and fixedly connected. The horizontal cross-section of the first vertical plate 5 and the second vertical plate 6 forms a V-shape, and the opening side of the V-shape is the groove 4 mentioned above, wherein the groove 4 of the V-shape faces the side away from the rotation direction of the support 1. In this embodiment, the angle between the first vertical plate 5 and the second vertical plate 6 is 65 degrees. It should be noted that the angle between the first vertical plate 5 and the second vertical plate 6 is 10-90 degrees, or it can be 45 degrees, 60 degrees, etc. In addition, the structure of the drag blade 3 can be a single plate structure, that is, only the first vertical plate 5 is provided, without the second vertical plate 6. By setting the drag blade 3 as a first vertical plate 5 and a second vertical plate 6, the structural stability is enhanced, the wind resistance is improved, and efficient operation is ensured even under strong wind conditions.

[0038] like Figure 3 As shown, in this embodiment, the horizontal cross-section of the first vertical plate 5 and the second vertical plate 6 is wavy. The horizontal cross-section refers to the cross-section on a horizontal plane when the first vertical plate 5 and the second vertical plate 6 are vertically arranged. In this case, the horizontal cross-section of the first vertical plate 5 and the second vertical plate 6 is wavy. That is, the cross-section is not a flat straight line or a regular geometric shape, but rather undulating and curved like a wave, with alternating highs and lows, resembling a continuous peak and trough shape similar to a sine curve. The wavy cross-section design not only increases the wind-receiving area but also optimizes airflow distribution, reduces eddy current generation, and further improves wind energy utilization. Simultaneously, the wavy shape effectively disperses wind impact, extends blade lifespan, and ensures long-term stable operation. The first vertical plate 5 and the second vertical plate 6 have higher structural strength, thus maintaining efficient and stable power generation performance even in complex wind farm environments. It should be noted that, as an alternative implementation, the first vertical plate 5 and the second vertical plate 6 can also be configured as a straight plate structure.

[0039] like Figure 3 As shown, in this embodiment, the connection between the first vertical plate 5 and the second vertical plate 6 is a rounded transition. When the resistance blade 3 or the lift blade 2 drives the support 1 to rotate, the rounded connection angle can reduce the frictional resistance during rotation, improve the smoothness of rotation, and reduce energy consumption. The rounded transition design also enhances the structural strength of the connection. It should be noted that, as an alternative implementation, the connection between the first vertical plate 5 and the second vertical plate 6 can also be set as a right angle without the rounded chamfer.

[0040] like Figure 2 As shown, in this embodiment, the support 1 includes: a first fixing plate 7, which has two plates spaced apart vertically. The first fixing plate 7 has multiple connecting arms 8 extending outwards horizontally, with the upper and lower ends of the lift blade 2 and the drag blade 3 respectively connected to the ends of the upper and lower connecting arms 8. Specifically, the lift blade 2 and the drag blade 3 are threadedly connected to the connecting arms 8 by bolts. Specifically, the connecting arms 8 are plate-like structures extending outwards horizontally. By setting the first fixing plate 7 and its connecting arms 8, the lift blade 2 and the drag blade 3 are securely installed, enhancing the wind resistance of the overall structure. It should be noted that, as an alternative implementation, the connecting arms 8 can also adopt other shapes, such as L-shaped or T-shaped.

[0041] Specifically, the first fixed plate 7 is installed on the rotating shaft, which is vertically positioned. A generator is connected to the bottom of the rotating shaft. The rotation of the lift blades 2 and the drag blades 3 drives the rotating shaft to rotate, thereby driving the generator to generate electricity.

[0042] Specifically, in this embodiment, the connecting arm 8 has six blades, including three lift blades 2 and three drag blades 3. A drag blade 3 is positioned between every two adjacent lift blades 2. The angle between the drag blade 3 and the adjacent lift blade 2 is 60 degrees. In other words, the six blades are arranged in a circular array with uniform spacing, forming optimal airflow guidance and further improving wind energy conversion efficiency.

[0043] like Figure 2 As shown, in this embodiment, a vertically extending fixing member 9 is fixedly connected to the upper end face of the first fixing plate 7. The fixing member 9 is cylindrical. Several connecting members 10 are provided on the fixing member 9. One end of each connecting member 10 is connected to the fixing member 9, and the other end is connected to the upper end face of the connecting arm 8. By providing the fixing member 9, one end of each connecting member 10 is connected to the fixing member 9, and the other end is connected to the upper end of the connecting arm 8. The connecting member 10 provides multi-dimensional support to the connecting arm 8, further enhancing the stability of the structure. It should be noted that, as an alternative implementation, the fixing member 9 and connecting members 10 may not be provided.

[0044] Specifically, there are six connectors 10.

[0045] like Figure 2 As shown, in this embodiment, the connector 10 is provided with an adjustment component 11 for adjusting the tightness of the connector 10. By setting the adjustment component 11, the tightness of the connector 10 can be flexibly adjusted to ensure that the blades always maintain optimal working condition under different wind speeds. It should be noted that, as an alternative implementation, the adjustment component 11 may not be provided. Instead, a long threaded hole may be provided on the fixing member 9 or the connecting arm 8. The long threaded hole extends in the same direction as the connecting arm 8. The tension can be adjusted by adjusting the position of the bolt in the threaded hole.

[0046] like Figure 2 As shown, in this embodiment, the adjustment assembly 11 is located in the middle of the connector 10, which is divided into two sections. The adjustment assembly 11 includes a first adjustment member and a second adjustment member, which are threadedly connected. One end of the first adjustment member has a threaded post, and the other end is connected to one section of the connector 10. One end of the second adjustment member is connected to the other section of the connector 10, and the second adjustment member has a threaded hole that is threadedly connected to the threaded post. By turning the second adjustment member, the length of the connector 10 is adjusted, thereby adjusting the stretch of the connector 10 on the connecting arm 8. By setting the first and second adjustment members to be threadedly connected, the adjustment process is made more precise, ensuring that the blades can maintain the optimal angle under different wind conditions.

[0047] like Figure 2 As shown, in this embodiment, the connector 10 is detachably connected to the fixing member 9 and the connecting arm 8. The fixing member 9 and the connecting arm 8 are provided with threaded holes, and through holes are provided at both ends of the connector 10 in its extending direction. The bolt passes through the through holes of the connector 10 and is threadedly connected to the threaded holes of the fixing member 9. By making the connector 10 a detachable connection, the connector 10 can be removed when the tension of the connecting arm 8 does not need to be adjusted, which also facilitates transportation. The through holes of the connector 10 are elongated holes, allowing the bolt to be adjusted a large distance within the through holes, and then a smaller distance can be adjusted using the adjusting component 11.

[0048] Installation method of the lift-drag complementary vertical axis wind power generation structure: The first fixing plate 7 of the bracket 1 is installed on the vertically set rotating shaft. The lift blades 2 and drag blades 3 are installed at circumferential intervals at the ends of the upper and lower connecting arms 8 of the first fixing plate 7 by bolt connection. The number and spacing of the lift blades 2 and drag blades 3 are determined according to the specific design, with one drag blade 3 placed between two adjacent lift blades 2. A vertically extending fixing member 9 is fixedly connected to the upper end face of the first fixing plate 7. Several connecting members 10 are installed on the fixing member 9, with one end of the connecting member 10 connected to the fixing member 9 and the other end connected to the upper end face of the connecting arm 8. The tightness of the connecting members 10 is adjusted by adjusting the assembly 11.

[0049] The working principle of a lift-drag complementary vertical axis wind turbine structure: The drag blade 3 mainly relies on the resistance generated by airflow to drive the support 1 to rotate. When wind blows towards the windward side of the drag blade 3, the windward side experiences greater pressure, while the leeward side experiences less pressure, creating a drag torque that drives the blade to rotate, thus causing the support 1 to rotate around the vertical axis. The lift blade 2 operates based on the lift principle in aerodynamics. When airflow passes over the lift blade 2, the streamlined shape of the blade creates a difference in airflow velocity between the upper and lower surfaces. According to Bernoulli's principle, this generates a lift force perpendicular to the airflow direction on the blade, driving the support 1 to rotate. Through the synergistic effect of the drag blade 3 and the lift blade 2, efficient wind energy capture and conversion are achieved, improving power generation efficiency.

[0050] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A vertical axis wind power generation structure with complementary lift and drag, characterized in that, include: Scaffold (1); Multiple lifting blades (2) are provided, and the lifting blades (2) are arranged on the support (1) at circumferential intervals; Multiple drag blades (3) are provided. The drag blades (3) are provided on the support (1). Each drag blade (3) is located between two adjacent lift blades (2). The drag blades (3) are arranged in a circular pattern. The circumferential radius of the drag blades (3) is the same as the circumferential radius of the lift blades (2). The drag blades (3) have a wind-receiving surface that drives the support (1) to rotate. When the wind blows towards the wind-receiving surface of the resistance blade (3), the resistance blade (3) drives the support (1) to rotate.

2. The vertical axis wind power generation structure with complementary lift and drag as described in claim 1, characterized in that, The drag blade (3) has a groove (4) extending from one end to the other along the length direction. The groove (4) is open on the side facing away from the rotation direction of the support (1), and the groove (4) forms the wind-receiving surface.

3. The vertical axis wind power generation structure with lift-to-drag complementarity according to claim 2, characterized in that, The resistance blade (3) includes a first vertical plate (5) and a second vertical plate (6) arranged symmetrically. The first vertical plate (5) and the second vertical plate (6) are arranged vertically, and the first vertical plate (5) and the second vertical plate (6) are fixedly connected.

4. The vertical axis wind power generation structure with lift-drag complementarity according to claim 3, characterized in that, The horizontal cross-section of the first vertical plate (5) and / or the second vertical plate (6) is wavy.

5. The vertical axis wind power generation structure with lift-drag complementarity according to claim 3, characterized in that, The connection between the first vertical plate (5) and the second vertical plate (6) is a circular arc transition.

6. The vertical axis wind power generation structure with lift-drag complementarity according to any one of claims 1-5, characterized in that, The bracket (1) includes: a first fixing plate (7), the first fixing plate (7) having two spaced apart in the vertical direction, the first fixing plate (7) having a plurality of connecting arms (8) extending outward in the horizontal direction, and the lifting blade (2) or the drag blade (3) being disposed at the end of the connecting arm (8).

7. The vertical axis wind power generation structure with lift-drag complementarity according to claim 6, characterized in that, The upper end face of the first fixing plate (7) is fixedly connected to a vertically upward extending fixing member (9). The fixing member (9) is provided with a plurality of connecting members (10). One end of the connecting member (10) is connected to the fixing member (9), and the other end is connected to the upper end face of the end of the connecting arm (8).

8. The vertical axis wind power generation structure with complementary lift and drag according to claim 7, characterized in that, The connector (10) is provided with an adjustment component (11) for adjusting the tightness of the connector (10).

9. The vertical axis wind power generation structure with lift-drag complementarity according to claim 8, characterized in that, The adjustment assembly (11) includes: a first adjustment member and a second adjustment member, wherein the first adjustment member and the second adjustment member are threadedly connected.

10. The vertical axis wind power generation structure with lift-drag complementarity according to claim 7, characterized in that, The connector (10) is detachably connected to the fixing member (9) and the connecting arm (8).

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