A vertical axis wind generator

Abstract

The utility model relates to wind driven generator technical field discloses a vertical axis wind driven generator, including fan main shaft, a plurality of first blades, a plurality of first blades are along the circumferential interval of fan main shaft set up on fan main shaft, and a plurality of first blades form first blade group, a plurality of second blades, a plurality of second blades are along vertical direction set up on the downside of first blade group fan main shaft, and a plurality of second blades form second blade group, and second blade group at least partial with generator is at same horizontal height, the vertical axis wind driven generator of the utility model, through setting second blade group downside first blade group, and second blade group at least partial with generator is at same horizontal height, can reduce the gravity position of wind wheel whole. The structure setting of double -deck blade group can alleviate the tremble in the rotation of wind wheel, reduce the possibility of resonance occurrence, are favorable to keep the stable of power generation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, specifically to a vertical axis wind turbine. Background Technology

[0002] Vertical axis wind turbines are widely used devices in the field of wind power generation. They consist of multiple symmetrically arranged H-shaped generating blades, which are securely assembled by connecting components to form a complete wind turbine structure. Driven by natural wind power, the wind turbine can rotate smoothly around a vertical axis, and the mechanical energy of rotation is transferred to the generator through a transmission system, ultimately realizing the conversion of wind energy into electrical energy.

[0003] Currently, vertical axis wind turbines generally use a single-layer blade arrangement. Due to the concentrated layout of this single-layer blade assembly, the overall center of gravity of the turbine is relatively high. During strong winds, the lateral forces on the turbine increase, making it prone to irregular swaying, which can even affect the overall stability of the equipment. More importantly, the structural characteristics of the single-layer blade assembly cause noticeable vibration during rotation. As operating time accumulates, this vibration gradually intensifies and may lead to resonance. This resonance not only interferes with the power generation process, causing significant fluctuations in power efficiency and disrupting stable output, but also causes continuous fatigue damage to the turbine's connecting components and airfoil body, thus significantly shortening the turbine's lifespan and increasing maintenance costs and replacement frequency. Utility Model Content

[0004] In view of this, the present invention provides a vertical axis wind turbine to solve the problem that the overall center of gravity of the wind turbine in the existing H-type vertical axis wind turbine is too high, which makes it prone to swaying under strong wind conditions, affecting the stability of power generation efficiency and reducing the service life of the wind turbine.

[0005] This utility model provides a vertical axis wind turbine, comprising:

[0006] Fan spindle;

[0007] Multiple first blades are arranged at circumferential intervals on the main shaft of the fan, and the multiple first blades form a first blade group;

[0008] Multiple second blades are vertically disposed on the main shaft of the wind turbine below the first blade group, forming a second blade group, and at least part of the second blade group is at the same horizontal height as the generator.

[0009] Optionally, it also includes:

[0010] A first support plate and a second support plate are arranged in parallel and their surface directions are both perpendicular to the axial direction of the fan main shaft. The first support plate and the second support plate are fixedly disposed on the fan main shaft at intervals, forming a gap between the first support plate and the second support plate. The first blade is disposed in the gap, and the two ends of the first blade are fixedly disposed on the first support plate and the second support plate, respectively. The second blade is fixedly disposed on the side of the second support plate away from the first support plate.

[0011] Optionally, both the first support plate and the second support plate include:

[0012] A central disc portion, which is mounted on the main shaft of the fan;

[0013] A tapered extension is formed extending radially from the edge of the central disk away from the main shaft of the fan. The number of tapered extensions corresponds to the number of the first blades. The two ends of the first blades are respectively fixed on the tapered extensions of the first support plate and the second support plate. The second blades are disposed on the tapered extensions of the second support plate on the side away from the first blades.

[0014] Optionally, it also includes a cable tie assembly, one end of which is connected to the end of the main shaft of the wind turbine away from the first blade group, and the other end is connected to the first support plate.

[0015] Optionally, the cable-stayed assembly includes:

[0016] An end fixing member is provided at the end of the main shaft of the fan that is away from the first blade group;

[0017] Multiple tie rods are arranged radially, with one end of each tie rod connected to the end fixing member and the other end connected to the first support plate.

[0018] Optionally, the second blade group includes at least two layers of second blades parallel to the axial direction of the main shaft of the fan, and the at least two layers of second blades are equally spaced with the main shaft of the fan as the axis.

[0019] Optionally, at least two second blades located on different second blade layers are arranged parallel to each other in the same radial direction.

[0020] Optionally, in the second blade group, two second blades located in the same radial direction and parallel to each other form a second blade pair, and the ends of each second blade pair away from the second support plate are fixedly connected by a third support plate.

[0021] Optionally, the first blade group includes at least two layers of first blades parallel to the axial direction of the main shaft of the fan, and the at least two layers of first blades are equally spaced with the main shaft of the fan as the axis; and the first blades and the second blades located in the same radial direction are in the same axial plane.

[0022] Optionally, the first blade is a standard lift-type blade;

[0023] And / or, the second blade is a standard lift-type blade.

[0024] Beneficial effects

[0025] This utility model provides a vertical axis wind turbine, comprising a wind turbine main shaft; a plurality of first blades, which are circumferentially spaced on the wind turbine main shaft, forming a first blade group; and a plurality of second blades, which are vertically arranged on the wind turbine main shaft below the first blade group, forming a second blade group, wherein at least part of the second blade group is at the same horizontal height as the generator. This vertical axis wind turbine, by arranging a second blade group below the first blade group, and with at least part of the second blade group at the same horizontal height as the generator, can lower the center of gravity of the wind turbine. In windy weather, this reduces the lateral forces on the wind turbine, lessens irregular swaying, and helps improve the overall stability of the equipment. Simultaneously, the double-layer blade group structure can alleviate vibration during wind turbine rotation, reduce the possibility of resonance, help maintain stable power generation efficiency, reduce fatigue damage to wind turbine connecting components and the airfoil body, thereby extending the service life of the wind turbine and reducing equipment maintenance costs and replacement frequency. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a structural schematic diagram of a vertical axis wind turbine according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the installation of the first support plate and the inclined cable assembly according to an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the installation of the second support plate and the inclined cable assembly according to an embodiment of the present utility model;

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Main shaft of the wind turbine; 2. First blade; 3. Second blade; 4. Generator; 5. First support plate; 6. Second support plate; 7. End fixing component; 8. Tie rod; 9. Third support plate. Detailed Implementation

[0032] 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.

[0033] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0034] According to an embodiment of the present invention, a vertical axis wind turbine generator 4 is provided, comprising:

[0035] Fan main shaft 1;

[0036] Multiple first blades 2 are arranged at intervals along the circumference of the main shaft 1 of the fan, and the multiple first blades 2 form a first blade group;

[0037] Multiple second blades 3 are vertically arranged on the main shaft 1 of the wind turbine below the first blade group. The multiple second blades 3 form a second blade group, and the second blade group is at least partially at the same horizontal height as the generator 4.

[0038] It should be noted that the wind turbine main shaft 1 is the same as the generator 4 main shaft. Through the rotation of the first blade 2 and the second blade 3, the generator 4 can be directly driven to rotate, and the mechanical energy captured by the blades and converted into wind energy is transferred to the generator 4, thereby completing the conversion of electrical energy.

[0039] It should be noted that the main shaft 1 of the wind turbine is set in a vertical position, and the generator 4 is installed on the lower side of the main shaft 1. At this time, the vertical dimension of the overlapping area between the second blade group and the generator 4 can be set according to a certain ratio. For example, based on the vertical height of the generator 4, the height of the overlapping area between the second blade group and the generator 4 can account for one-third to two-thirds of the vertical height of the generator 4, so as to achieve reasonable adjustment of the center of gravity and avoid affecting the rotation of the blades.

[0040] The vertical axis wind turbine 4 provided in this embodiment lowers the center of gravity of the wind turbine by setting a second blade group below the first blade group, with at least part of the second blade group at the same horizontal height as the generator 4. In windy weather, this reduces the lateral forces on the wind turbine, mitigating irregular swaying and improving overall equipment stability. Simultaneously, the double-layer blade group structure alleviates vibrations during wind turbine rotation, reduces the likelihood of resonance, helps maintain stable power generation efficiency, and reduces fatigue damage to wind turbine connecting components and the airfoil body, thereby extending the wind turbine's service life and reducing equipment maintenance costs and replacement frequency.

[0041] Furthermore, it also includes:

[0042] The first support plate 5 and the second support plate 6 are arranged in parallel and their surface directions are perpendicular to the axial direction of the fan main shaft 1. The first support plate 5 and the second support plate 6 are fixedly installed on the fan main shaft 1 at intervals, forming a gap between the first support plate 5 and the second support plate 6. The first blade 2 is installed in the gap, and the two ends of the first blade 2 are fixedly installed on the first support plate 5 and the second support plate 6 respectively. The second blade 3 is fixedly installed on the side of the second support plate 6 away from the first support plate 5.

[0043] As is easily understood, the first support plate 5 and the second support plate 6 are arranged parallel to and perpendicular to the axial direction of the main shaft 1 of the wind turbine. This not only securely clamps the first blade 2 in the gap formed by the two plates, but also provides a reliable mounting base for the second blade 3. This structural arrangement enhances the firmness of the connection between the first blade 2 and the second blade 3 and the main shaft 1 of the wind turbine. During the rotation of the impeller, it helps to reduce the swaying amplitude of the blades, alleviate vibration, and reduce the possibility of fatigue damage to the connection parts due to frequent stress, thereby extending the service life of the blades and related connecting components.

[0044] Furthermore, both the first support plate 5 and the second support plate 6 include:

[0045] The central disc is mounted on the main shaft 1 of the fan.

[0046] The conical extension is formed by extending radially from the edge of the central disk away from the main shaft 1 of the fan. The number of conical extensions corresponds to the number of first blades 2. The two ends of the first blade 2 are respectively fixed on the conical extensions of the first support plate 5 and the second support plate 6. The second blade 3 is disposed on the conical extension of the second support plate 6 on the side away from the first blade 2.

[0047] It should be noted that the two ends of the first blade 2 are respectively bolted to the tapered extensions of the first support plate 5 and the second support plate 6. Since the number of tapered extensions corresponds to the number of first blades 2, each first blade 2 can precisely correspond to one tapered extension on the two support plates. The tightening effect of the bolts ensures the stable installation of the first blade 2. The second blade 3 is installed on the side of the second support plate 6 away from the first blade 2, and is also connected to the tapered extensions by bolts. Each second blade 3 corresponds to one tapered extension. The bolt connection makes the second blade 3 and the second support plate 6 form an integral structure, ensuring that the first blade 2 and the second blade 3 are stably stressed when the wind turbine is running.

[0048] It is easy to understand that the central disc is installed on the main shaft 1 of the fan, which can ensure that the support plate is firmly connected to the main shaft. The number of tapered extensions corresponds to the number of first blades 2, which can stably fix the two ends of the first blades 2, improve the stability of the installation of the first blades 2, and the tapered extensions extend radially towards the main shaft 1 of the fan, which helps to disperse the force transmitted by the first blades 2. At the same time, the second blades 3 are set on the tapered extensions of the second support plate 6, making the installation of the second blades 3 more reliable. The overall structure helps to distribute the force evenly.

[0049] In an alternative embodiment, the central disc portion can be replaced with a sleeve structure adapted to the fan main shaft 1, and the tapered extension portion can be replaced with an arc-shaped plate structure extending radially. The arc-shaped plate structure is connected to the first blade 2 and the second blade 3, which can also achieve stable fixation of the blades and effective transmission of force.

[0050] Furthermore, it also includes a cable tie assembly, one end of which is connected to the end of the main shaft 1 of the fan away from the first blade group, and the other end is connected to the first support plate 5.

[0051] In a straightforward manner, one end of the inclined cable assembly is connected to the end of the wind turbine main shaft 1 away from the first blade group, and the other end is connected to the first support plate 5. This provides additional tension and fixation to the first support plate 5, enhancing the connection strength between the first support plate 5 and the wind turbine main shaft 1. During the rotation of the wind turbine, this assembly can help share the force transmitted from the blades to the support plate, reducing the deformation of the support plate and further improving the stability of the entire blade group installation structure.

[0052] Furthermore, the cable-stayed assembly includes:

[0053] End fixing member 7 is located at the end of the main shaft 1 of the fan that is away from the first blade group;

[0054] Multiple tie rods 8 are arranged radially, with one end of each tie rod 8 connected to an end fixing member 7 and the other end connected to a first support plate 5.

[0055] It is easy to understand that the end fixing member 7 provides a stable connection base for the tie rod 8. The multiple tie rods 8 are radially distributed and can pull the first support plate 5 from different directions, thereby enhancing the connection stability between the first support plate 5 and the main shaft 1 of the wind turbine. When the wind turbine is running, it can help to disperse the force on the first support plate 5, reduce its deformation, and further improve the overall stability of the blade assembly installation structure.

[0056] In an alternative embodiment, the end fixing member 7 can be replaced with an annular connector sleeved on the end of the fan main shaft 1, and the pull rod 8 can be replaced with a radially distributed cable. One end of the cable is connected to the annular connector, and the other end is connected to the first support plate 5, which can also achieve the pulling and fixing of the first support plate 5 and ensure the stability of the structure.

[0057] Furthermore, the second blade group includes at least two layers of second blades parallel to the axial direction of the main shaft 1 of the fan, and the at least two layers of second blades are equally spaced with the main shaft 1 of the fan as the axis.

[0058] In a straightforward manner, the second blade group comprises at least two layers of blades parallel to the axial direction of the main shaft 1 of the wind turbine, with each blade layer evenly spaced around the main shaft 1. This increases the interaction area between the wind turbine and the airflow, resulting in more uniform wind energy capture. Simultaneously, the multi-layered structure further disperses the forces acting on the wind turbine, reducing the load on individual blade layers and helping to maintain the stability of the wind turbine's rotation, thus minimizing the impact of vibration on the equipment.

[0059] Furthermore, in the same radial direction, at least two second blades 3 located on different second blade layers are arranged parallel to each other.

[0060] It is easy to understand that arranging at least two second blades 3 on different second blade layers parallel to each other in the same radial direction can make the blades more evenly stressed in that radial direction, reducing local stress concentration caused by differences in blade angles. This can help the wind turbine maintain a stable attitude during rotation, reduce additional vibration caused by uneven stress, and help improve the overall operational stability of the wind turbine structure.

[0061] Furthermore, in the second blade group, two second blades located in the same radial direction and parallel to each other form a pair of second blades, and the ends of each pair of second blades away from the second support plate 6 are fixedly connected by a third support plate 9.

[0062] It should be noted that two parallel second blades in the same radial direction form a pair of second blades 3. Their ends away from the second support plate 6 are fixedly connected by the third support plate 9, which can enhance the overall structural strength of the pair of second blades 3, making the blades less prone to deformation when subjected to force, making the force transmission between the two blades more coordinated, reducing the impact of the swaying of one blade on the other blade, improving the overall stability of the second blade group, and thus helping the wind turbine to maintain stable operation.

[0063] Furthermore, the first blade group includes at least two layers of first blades 2 parallel to the axial direction of the main shaft 1 of the fan, and the at least two layers of first blades 2 are equally spaced with the main shaft 1 of the fan as the axis; and the first blades 2 and the second blades 3 located in the same radial direction are in the same axial plane.

[0064] It should be noted that the first blade group is provided with at least two layers of first blades 2 parallel to the axial direction of the main shaft 1 of the wind turbine, and each blade layer is distributed at equal intervals with the main shaft 1 of the wind turbine as the axis. This can increase the range of action between the first blade group and the airflow, and make the wind energy capture more balanced. The first blade 2 and the second blade 3 in the same radial direction are in the same axial plane, which can make the two consistent in the direction of force, reduce the force transmission disorder caused by the misalignment of the blade position, help the wind turbine to be more coordinated in terms of force, improve the stability of the rotation process, and reduce the occurrence of additional vibration.

[0065] Furthermore, the first blade 2 is a standard lift-type blade.

[0066] Furthermore, the second blade 3 is a standard lift-type blade.

[0067] It should be noted that standard lift blades are a common type of blade used in vertical axis wind turbines. Their cross-section is typically streamlined, similar to the shape of an aircraft wing. Under the influence of airflow, these blades can generate lift through the difference in airflow velocity between their upper and lower surfaces, driving the wind turbine to rotate.

[0068] 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 turbine generator, characterized in that, include: Fan main shaft (1); Multiple first blades (2) are arranged at intervals along the circumference of the main shaft (1) of the fan, and the multiple first blades (2) form a first blade group; Multiple second blades (3) are arranged vertically on the main shaft (1) of the wind turbine below the first blade group. The multiple second blades (3) form a second blade group, and the second blade group is at least partially at the same horizontal height as the generator (4).

2. The vertical axis wind turbine generator according to claim 1, characterized in that, Also includes: The first support plate (5) and the second support plate (6) are arranged in parallel and their plate surfaces are perpendicular to the axial direction of the fan main shaft (1). The first support plate (5) and the second support plate (6) are fixedly arranged on the fan main shaft (1) at intervals. A gap is formed between the first support plate (5) and the second support plate (6). The first blade (2) is arranged in the gap. The two ends of the first blade (2) are fixedly arranged on the first support plate (5) and the second support plate (6) respectively. The second blade (3) is fixedly arranged on the side of the second support plate (6) away from the first support plate (5).

3. The vertical axis wind turbine generator according to claim 2, characterized in that, Both the first support plate (5) and the second support plate (6) include: A central disc portion, which is mounted on the main shaft (1) of the fan; A tapered extension is formed extending radially from the edge of the central disk away from the main shaft (1) of the fan. The number of tapered extensions corresponds to the number of the first blades (2). The two ends of the first blades (2) are respectively fixed on the tapered extensions of the first support plate (5) and the second support plate (6). The second blades (3) are disposed on the tapered extensions of the second support plate (6) on the side away from the first blades (2).

4. The vertical axis wind turbine generator according to claim 3, characterized in that, It also includes a cable tie assembly, one end of which is connected to the end of the main shaft (1) of the fan away from the first blade group, and the other end is connected to the first support plate (5).

5. The vertical axis wind turbine generator according to claim 4, characterized in that, The cable-stayed assembly includes: End fixing member (7), the end fixing member (7) is disposed at one end of the main shaft (1) of the fan away from the first blade group; Multiple pull rods (8) are radially distributed, with one end of each pull rod (8) connected to the end fixing member (7) and the other end connected to the first support plate (5).

6. The vertical axis wind turbine generator according to any one of claims 2-5, characterized in that, The second blade group includes at least two layers of second blades parallel to the axial direction of the main shaft (1) of the fan, and the at least two layers of second blades are equally spaced with the main shaft (1) of the fan as the axis.

7. The vertical axis wind turbine generator according to claim 6, characterized in that, In the same radial direction, at least two second blades (3) located on different second blade layers are arranged parallel to each other.

8. The vertical axis wind turbine generator according to claim 6, characterized in that, In the second blade group, two second blades located in the same radial direction and parallel to each other form a pair of second blades (3), and the ends of each pair of second blades (3) away from the second support plate (6) are fixedly connected by a third support plate (9).

9. The vertical axis wind turbine generator according to claim 8, characterized in that, The first blade group includes at least two layers of first blades (2) parallel to the axial direction of the main shaft (1) of the fan. The at least two layers of first blades (2) are equally spaced with the main shaft (1) of the fan as the axis. The first blades (2) and the second blades (3) located in the same radial direction are in the same axial plane.

10. The vertical axis wind turbine generator according to any one of claims 1-5, characterized in that, The first blade (2) is a standard lift-type blade; And / or, the second blade (3) is a standard lift blade.

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