Vertical axis wind turbine structure

Abstract

The invention discloses a vertical axis wind driven generator structure which comprises a vertically-arranged generator and a plurality of blades evenly arranged in the circumferential direction of the generator, and the rotor end of the generator is coaxially connected with a flat plate connecting flange. The upper end of the flat plate connecting flange is coaxially connected with a flange rotating shaft and a first angle connecting flange lower than the upper part of the blade in sequence; the flat plate connecting flange is connected with the middles of the blades through the horizontal supporting rods, the first angle connecting flange is connected with the upper portions of the blades through the first angle supporting rods, and a first anti-torsion supporting rod is connected between the upper portions of every two adjacent blades. The overall gravity center of the wind wheel can be reduced, so that the overall gravity center of the wind wheel is closer to the connecting end face of the tower drum, the length of an acting arm of force of a vibration load on the tower drum is effectively shortened, and the transmission effect of a dynamic load to the tower drum caused by unbalanced mass of the wind wheel is remarkably weakened; therefore, the vibration response of the tower drum caused by the coupling effect of pneumatic excitation and mechanical vibration is inhibited.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a vertical axis wind power generator structure. Background Art

[0002] At present, with the extreme changes in global climate, and for the sake of human health and environmental protection, people are paying more and more attention to the development of new energy equipment such as wind energy equipment. Among wind energy equipment, horizontal axis wind turbines have received widespread attention due to their superior performance, and they shine in megawatt-level wind power generation. Vertical axis wind turbines encounter many difficulties when they are large-scaled. For example, the cantilever beam type arm makes it easy to suffer fatigue damage. The cantilever beam arm design causes the fatigue stress concentration factor to reach more than 2.5, and the failure rate under dynamic load exceeds 15% when large-scaled; at the same time, due to the characteristics of simple structure and reliable operation of vertical axis wind turbines, vertical axis wind turbines have great development and research value in the field of small wind turbines.

[0003] However, most of the existing vertical axis wind turbines, such as the patent with publication number CN102135067A, generally set the support rods radially, that is, the tower column needs to extend at least to the height of the support rod connected to the upper part of the blade. This will make the overall center of gravity of the wind rotor including the tower column higher, the distance between the overall center of gravity of the wind rotor and the connecting end face of the tower is farther, and the force arm of the vibration load on the tower is longer, which will cause the eccentric load, gust impact load, turbulent pulsation load and other dynamic loads to the tower to have a stronger transmission effect, and then cause a larger tower vibration response due to the coupling of aerodynamic excitation and mechanical vibration. Summary of the invention

[0004] In order to overcome the defects of the prior art, the present invention provides a vertical axis wind turbine structure, which can suppress the tower vibration response caused by the coupling of aerodynamic excitation and mechanical vibration.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A vertical axis wind turbine structure, comprising a vertically arranged generator and a plurality of blades evenly arranged on the circumference of the generator, wherein a rotor end of the generator is coaxially connected with a flat plate connecting flange, and an upper end of the flat plate connecting flange is coaxially connected with a flange rotating shaft and a first angle connecting flange lower than an upper portion of the blade in sequence;

[0007] The flat plate connecting flange is connected to the middle of several blades through several horizontal support rods, the first angle connecting flange is connected to the upper part of several blades through several first angle support rods, and the upper parts of two adjacent blades are connected with a first anti-torsion support rod.

[0008] The beneficial effects of adopting the above technical solution are as follows: the rotor end of the generator is connected to the upper part of the blade through the first angle connecting flange and the first angle support rod extending obliquely upward, without the need to extend vertically upward through the tower column to the same level as the upper part of the blade, thereby lowering the overall center of gravity of the wind wheel and making the overall center of gravity of the wind wheel closer to the connecting end face of the tower, so as to effectively shorten the length of the force arm of the vibration load on the tower, which significantly weakens the transmission effect of dynamic loads such as eccentric loads, gust impact loads and turbulent pulsation loads caused by the unbalanced mass of the wind wheel to the tower, thereby suppressing the vibration response of the tower caused by the coupling of aerodynamic excitation and mechanical vibration.

[0009] Furthermore, the rotor end of the generator is coaxially connected with a second angle connection flange higher than the lower part of the blade. The second angle connection flange is respectively connected to the lower parts of several blades through several second angle support rods. A second anti-torsion support rod is connected between the lower parts of two adjacent blades.

[0010] The beneficial effects of adopting the above technical solution are as follows: the rotor end of the generator is also connected to the lower part of the blade through a second angle connecting flange and a second angle support rod extending obliquely downward, so that the blade moves downward relative to the generator, so as to further lower the overall center of gravity of the wind rotor, and further make the overall center of gravity of the wind rotor closer to the tower connection end face, so as to further shorten the length of the force arm of the vibration load on the tower, which further weakens the transmission effect of dynamic loads such as eccentric loads, gust impact loads and turbulent pulsation loads caused by the unbalanced mass of the wind rotor to the tower, thereby further suppressing the vibration response of the tower caused by the coupling of aerodynamic excitation and mechanical vibration.

[0011] Further, the upper and lower parts of the blade are both connected with an angle connector, the angle connector is connected with a first flat connector, and the middle part of the blade is connected with a second flat connector;

[0012] The angle connector on the upper part of the blade is connected to the first angle connecting flange through the first angle support rod, and the angle connector on the lower part of the blade is connected to the second angle connecting flange through the second angle support rod; the first flat head connectors on the upper parts of two adjacent blades are connected through the first anti-torsion support rod, and the first flat head connectors on the lower parts of two adjacent blades are connected through the second anti-torsion support rod; the second flat head connector is connected to the flat plate connecting flange through a horizontal support rod.

[0013] The beneficial effect of adopting the above technical solution is: it is arranged so that one end of the first angle support rod, the horizontal support rod and the second angle support rod are connected to the blade, and both ends of the first anti-torsion support rod and the second anti-torsion support rod are connected to two adjacent blades.

[0014] Furthermore, the first angle connecting flange and the second angle connecting flange have the same specifications, the horizontal support rod and the first angle support rod have the same cross-sectional dimensions, the first angle support rod and the second angle support rod have the same specifications, the first anti-torsion support rod and the second anti-torsion support rod have the same specifications, and the first flat head connecting piece and the second flat head connecting piece have the same specifications.

[0015] The beneficial effect of adopting the above technical solution is: such an arrangement can reduce the increase in the number of drawing modifications caused by inconsistent specifications, and change the design by changing fewer structures, thereby greatly reducing the amount of drawing modifications, which is also beneficial for the foundry to ensure production quality.

[0016] Furthermore, the first angle support rod, the second angle support rod and the horizontal support rod are all provided with a semicircular curved surface on the same side as the leading edge of the blade.

[0017] The beneficial effect of adopting the above technical solution is: such an arrangement can reduce the air resistance to the first angle support rod, the second angle support rod and the horizontal support rod.

[0018] Furthermore, the generator and the flat plate connecting flange, the flat plate connecting flange and the flange rotating shaft, the flange rotating shaft and the first angle connecting flange, the flat plate connecting flange and the horizontal support rod, the horizontal support rod and the second flat head connecting piece, the first angle connecting flange and the first angle supporting rod, the first angle supporting rod and the angle connecting piece on the upper part of the blade, the first anti-torsion support rod and the first flat head connecting piece on the upper part of the blade, the generator and the second angle connecting flange, the second angle connecting flange and the second angle supporting rod, the second angle supporting rod and the angle connecting piece on the lower part of the blade, the second anti-torsion support rod and the first flat head connecting piece on the lower part of the blade, the angle connecting piece and the first flat head connecting piece, the angle connecting piece and the blade, and the second flat head connecting piece and the blade are all detachably connected through detachable parts of the same specifications; wherein the detachable parts may be bolts.

[0019] The beneficial effects of adopting the above technical solution are as follows: by using detachable parts of the same specifications to detachably connect these parts, each part can be transported after being disassembled, which is beneficial to reducing transportation costs; at the same time, when installing or maintaining each part, detachable parts of the same specifications are used for connection. This can, on the one hand, reduce the time wasted on selecting detachable parts of the correct specifications, and reduce unnecessary installation errors caused by installing detachable parts of the wrong specifications, so as to improve the efficiency of installation and maintenance, and on the other hand, it is also beneficial to bulk purchase or reduce the design of detachable parts, so as to reduce the cost of installation and maintenance.

[0020] It should be noted that the first anti-torsion support rod and the second anti-torsion support rod are connected to the first flat head connector through two bolt holes at both ends to achieve connection with the blade; in the specific implementation process, it is necessary to pay attention to the positioning of the bolt holes on the first anti-torsion support rod and the second anti-torsion support rod, and multiple bolt holes can be pre-drilled, and some are left for drilling during on-site installation to reduce the difficulty of on-site installation.

[0021] Furthermore, the angle connector and the second flat connector are both pre-installed on the blade, and the first flat connector is pre-installed on the angle connector.

[0022] The beneficial effect of adopting the above technical solution is: such an arrangement can improve the pre-installation rate of the wind wheel, so that the installation site does not need to install the angle connector, the second flat head connector and the first flat head connector, thereby reducing the on-site installation work and installation time.

[0023] Furthermore, the inclination angles of the connection ends of the first angle connection flange and the second angle connection flange are both 45-60°.

[0024] Further, the generator is an axial flux generator or a radial flux generator.

[0025] The beneficial effects of the present invention are:

[0026] The rotor end of the generator is also connected to the lower part of the blade through a second angle connecting flange and a second angle supporting rod extending obliquely downward, so that the blade moves downward relative to the generator, thereby further lowering the overall center of gravity of the wind rotor, and further making the overall center of gravity of the wind rotor closer to the connecting end face of the tower, so as to further shorten the length of the force arm of the vibration load on the tower, which further weakens the transmission effect of dynamic loads such as eccentric loads, gust impact loads and turbulent pulsation loads caused by the unbalanced mass of the wind rotor to the tower, thereby further suppressing the vibration response of the tower caused by the coupling of aerodynamic excitation and mechanical vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0028] Figure 1 Shows a schematic diagram of the structure of the present invention;

[0029] Figure 2 The connection diagram of the generator in the present invention is shown;

[0030] Figure 3 Shows Figure 1 A partial enlarged view of the middle A;

[0031] Figure 4 Shows Figure 1 A partial enlarged view of point B in the middle;

[0032] Figure 5 A schematic diagram showing the structure of the first angle support rod, the horizontal support rod and the second angle support rod in the present invention;

[0033] Figure 6 A schematic diagram showing the structure of the first anti-torsion support rod and the second anti-torsion support rod in the present invention is shown;

[0034] Figure 7 The schematic diagram of the structure of the flat plate connecting flange in the present invention is shown;

[0035] Figure 8 It shows a schematic diagram of the structure of the first angle connecting flange and the second angle connecting flange in the present invention;

[0036] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0037] Reference numerals:

[0038] 1. Blade; 2. First angle connecting flange; 3. Flange shaft; 4. Flat plate connecting flange; 5. First anti-torsion support rod; 6. First angle support rod; 7. Horizontal support rod; 8. Second angle support rod; 9. Second anti-torsion support rod; 10. Generator; 11. Second angle connecting flange; 12. Second flat head connecting piece; 13. First flat head connecting piece; 14. Angle connecting piece. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] The present invention provides a vertical axis wind turbine structure, such as Figure 1 and Figure 2 As shown, it includes a generator 10 vertically arranged on a tower and a plurality of blades 1 uniformly arranged in the circumferential direction of the generator 10. The rotor end of the generator 10 is coaxially connected to a Figure 7 The flat plate connecting flange 4 shown, the upper end of which is coaxially connected with the flange rotating shaft 3 and the first angle connecting flange 2 which is lower than the upper part of the blade 1;

[0041] The flat connecting flange 4 is connected to the middle of several blades 1 through several horizontal support rods 7, the first angle connecting flange 2 is connected to the upper part of several blades 1 through several first angle support rods 6, and the first anti-torsion support rod 5 is connected between the upper parts of two adjacent blades 1.

[0042] It can be understood that the rotor end of the generator 10 is connected to the upper part of the blade 1 through the first angle connecting flange 2 and the first angle support rod 6 extending obliquely upward, without the need to extend vertically upward through the tower column to the same level as the upper part of the blade 1, so that the overall center of gravity of the wind rotor can be lowered, and the overall center of gravity of the wind rotor can be made closer to the connecting end face of the tower, so as to effectively shorten the length of the force arm of the vibration load on the tower, which significantly weakens the transmission effect of dynamic loads such as eccentric loads, gust impact loads and turbulent pulsation loads caused by the unbalanced mass of the wind rotor to the tower, thereby suppressing the vibration response of the tower caused by the coupling of aerodynamic excitation and mechanical vibration; at the same time, the number of wind rotor components is reduced, and the strength of the vertical axis wind turbine structure is ensured.

[0043] It should be noted that in the vertical axis wind turbine structure with a power greater than 5 kW, the flat plate connecting flange 4 needs to be reinforced. The specific reinforcement process is to weld reinforcing ribs at the connection position after the flat plate connecting flange 4 is cut.

[0044] In one embodiment, the rotor end of the generator 10 is coaxially connected to a second angle connecting flange 11 that is higher than the lower part of the blade 1. The second angle connecting flange 11 is respectively connected to the lower parts of several blades 1 through several second angle support rods 8, and a second anti-torsion support rod 9 is connected between the lower parts of two adjacent blades 1.

[0045] It can be understood that the rotor end of the generator 10 is also connected to the lower part of the blade 1 through the second angle connecting flange 11 and the second angle support rod 8 extending obliquely downward, so that the blade 1 moves downward relative to the generator 10, so as to further lower the overall center of gravity of the wind rotor, and further make the overall center of gravity of the wind rotor closer to the tower connection end face, so as to further shorten the length of the force arm of the vibration load on the tower, which further weakens the transmission effect of dynamic loads such as eccentric loads, gust impact loads and turbulent pulsation loads caused by the unbalanced mass of the wind rotor to the tower, thereby further suppressing the vibration response of the tower caused by the coupling of aerodynamic excitation and mechanical vibration.

[0046] It should be noted that the blade 1 transmits torque through the first angle support rod 6, the horizontal support rod 7 and the second angle support rod 8 which are respectively distributed in the upper part, the middle part and the lower part of the blade 1.

[0047] In one embodiment, Figure 3 and Figure 4 As shown, the upper and lower parts of the blade 1 are connected with an angle connector 14, the angle connector 14 is connected with a first flat connector 13, and the middle part of the blade 1 is connected with a second flat connector 12;

[0048] The angle connector 14 at the top of the blade 1 is connected to the first angle connecting flange 2 via the first angle support rod 6, and the angle connector 14 at the bottom of the blade 1 is connected to the second angle connecting flange 11 via the second angle support rod 8; the first flat head connectors 13 at the tops of two adjacent blades 1 are connected via the first anti-torsion support rod 5, and the first flat head connectors 13 at the bottoms of two adjacent blades 1 are connected via the second anti-torsion support rod 9; the second flat head connector 12 is connected to the flat plate connecting flange 4 via the horizontal support rod 7.

[0049] It is understandable that the arrangement is such that one end of the first angle support rod 6 , the horizontal support rod 7 and the second angle support rod 8 are connected to the blade 1 , and both ends of the first anti-torsion support rod 5 and the second anti-torsion support rod 9 are connected to two adjacent blades 1 .

[0050] It should be noted that the second flat-head connectors 12 appear in pairs on both sides of the horizontal support rod 7; in addition, the vertical-axis wind turbine structure proposed in the present invention does not need to add an anti-torsion support rod in the middle of the blade 1 of the 5kw~10kw model, but in order to comprehensively consider maintaining a similar design in a larger size, in actual applications, the small power will not reduce the bolt hole reservation of the second flat-head connector 12 here, which can reduce the cost of the vertical-axis wind turbine in the manufacturing process, and at the same time, an anti-torsion support rod can be added here in application scenarios with extreme winds.

[0051] In one embodiment, Figure 8 As shown, the first angle connecting flange 2 and the second angle connecting flange 11 have the same specifications, and by changing the angles of the first angle connecting flange 2 and the second angle connecting flange 11, blades 1 of different lengths can be adapted, wherein the inclination angles of the connecting ends of the first angle connecting flange 2 and the second angle connecting flange 11 are preferably 45-60°;

[0052] like Figure 5 As shown, the horizontal support rod 7 has the same cross-sectional size as the first angle support rod 6, and the first angle support rod 6 has the same specification as the second angle support rod 8, that is, the same mold can be used when producing the horizontal support rod 7, the first angle support rod 6 and the second angle support rod 8, which greatly reduces the production time;

[0053] like Figure 6 As shown, the first anti-torsion support rod 5 and the second anti-torsion support rod 9 have the same specifications, and the cross-sectional shapes of both are square, and the first flat-head connecting member 13 and the second flat-head connecting member 12 have the same specifications.

[0054] It can be understood that such a setting can reduce the increase in drawing modifications caused by inconsistent specifications, so that the design can be changed by changing fewer structures, thereby greatly reducing the amount of drawing modifications, and also helping the foundry to ensure production quality.

[0055] It should be noted that the first angle support rod 6 and the second angle support rod 8 differ from the horizontal support rod 7 only in length. In the design of a smaller wind turbine capacity, if the height of the blade 1 is lower than 2m, the second angle support rod 8 may not be used, and only the first angle support rod 6 and the horizontal support rod 7 may be used as support points to support the blade 1.

[0056] It should also be noted that the inclination angles of the connecting ends on the first angle connecting flange 2 and the second angle connecting flange 11 are the same, so they can be mass-produced, and the lengths of the first angle support rod 6 and the second angle support rod 8 are the same, which can also reduce on-site installation errors.

[0057] In one embodiment, the first angle support rod 6, the second angle support rod 8 and the horizontal support rod 7 are all provided with a semicircular curved surface on the same side as the leading edge of the blade 1 to reduce the air resistance to the first angle support rod 6, the second angle support rod 8 and the horizontal support rod 7; therefore, special attention should be paid to the front and back when installing the first angle support rod 6, the second angle support rod 8 and the horizontal support rod 7.

[0058] In one embodiment, the generator 10 and the flat plate connecting flange 4, the flat plate connecting flange 4 and the flange rotating shaft 3, the flange rotating shaft 3 and the first angle connecting flange 2, the flat plate connecting flange 4 and the horizontal support rod 7, the horizontal support rod 7 and the second flat head connecting piece 12, the first angle connecting flange 2 and the first angle supporting rod 6, the first angle supporting rod 6 and the angle connecting piece 14 on the upper part of the blade 1, the first anti-torsion support rod 5 and the first flat head connecting piece 13 on the upper part of the blade 1, the generator 10 and the second angle connecting flange 11, the second angle connecting flange 11 and the second angle supporting rod 8, the second angle supporting rod 8 and the angle connecting piece 14 on the lower part of the blade 1, the second anti-torsion support rod 9 and the first flat head connecting piece 13 on the lower part of the blade 1, the angle connecting piece 14 and the first flat head connecting piece 13, the angle connecting piece 14 and the blade 1, and the second flat head connecting piece 12 and the blade 1 are all detachably connected through detachable parts of the same specifications.

[0059] It can be understood that by using detachable parts of the same specifications to detachably connect these parts, the parts can be disassembled for transportation, which is conducive to reducing transportation costs; at the same time, when installing or maintaining each part, detachable parts of the same specifications are used for connection. On the one hand, this can reduce the time wasted on selecting detachable parts of the correct specifications, and reduce unnecessary installation errors caused by installing detachable parts of the wrong specifications, so as to improve the efficiency of installation and maintenance. On the other hand, it is also conducive to bulk procurement or reducing the design of detachable parts, so as to reduce the cost of installation and maintenance.

[0060] In one embodiment, the angle connector 14 and the second flat connector 12 are pre-installed on the blade 1, and the first flat connector 13 is pre-installed on the angle connector 14, so as to increase the pre-installation rate of the wind wheel, so that the angle connector 14, the second flat connector 12 and the first flat connector 13 do not need to be installed at the installation site, thereby reducing the on-site installation work and installation time.

[0061] In one embodiment, the generator 10 is an axial flux generator or a radial flux generator. Figure 2 The generator 10 shown in FIG. 1 is an axial flux ironless permanent magnet direct drive generator.

[0062] In summary, when the vertical axis wind turbine structure is adopted, the installation time can be reduced by about 50% and unnecessary installation errors can be reduced; in the design of vertical axis wind turbines of different specifications, the design can be changed by changing fewer structures, which greatly reduces the amount of modification of the drawings and allows the foundry to ensure the production quality; in addition, the first angle connecting flange 2 and the second angle connecting flange 11 with the same bending angle determine the connection position of the blade 1 and the length of the first angle support rod 6 and the second angle support rod 8, which lowers the overall center of gravity of the wind wheel and reduces the impact of the eccentricity of the wind wheel; at the same time, the wind wheel support arm can be reasonably distributed by changing the length of the flange shaft 3 to improve the stress distribution of the wind wheel.

[0063] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0064] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A vertical axis wind turbine structure, characterized in that: The invention comprises a generator (10) arranged vertically and a plurality of blades (1) evenly arranged in the circumferential direction of the generator (10); a rotor end of the generator (10) is coaxially connected with a flat plate connecting flange (4); an upper end of the flat plate connecting flange (4) is coaxially connected with a flange rotating shaft (3) and a first angle connecting flange (2) lower than the upper part of the blade (1) in sequence; The flat plate connecting flange (4) is respectively connected to the middle parts of the plurality of blades (1) via a plurality of horizontal support rods (7); the first angle connecting flange (2) is respectively connected to the upper parts of the plurality of blades (1) via a plurality of first angle support rods (6); and a first anti-torsion support rod (5) is connected between the upper parts of two adjacent blades (1).

2. A vertical axis wind turbine structure according to claim 1, characterized in that: The rotor end of the generator (10) is coaxially connected to a second angle connection flange (11) higher than the lower part of the blade (1); the second angle connection flange (11) is respectively connected to the lower parts of a plurality of blades (1) through a plurality of second angle support rods (8); and a second anti-torsion support rod (9) is connected between the lower parts of two adjacent blades (1).

3. A vertical axis wind turbine structure according to claim 2, characterized in that: The upper and lower parts of the blade (1) are both connected to an angle connector (14), the angle connector (14) is connected to a first flat connector (13), and the middle part of the blade (1) is connected to a second flat connector (12); The angle connecting piece (14) at the upper part of the blade (1) is connected to the first angle connecting flange (2) via the first angle supporting rod (6), and the angle connecting piece (14) at the lower part of the blade (1) is connected to the second angle connecting flange (11) via the second angle supporting rod (8); the first flat head connecting pieces (13) at the upper parts of two adjacent blades (1) are connected via the first anti-torsion supporting rod (5), and the first flat head connecting pieces (13) at the lower parts of two adjacent blades (1) are connected via the second anti-torsion supporting rod (9); and the second flat head connecting piece (12) is connected to the flat plate connecting flange (4) via the horizontal supporting rod (7).

4. A vertical axis wind turbine structure according to claim 3, characterized in that: The first angle connection flange (2) and the second angle connection flange (11) have the same specifications, the horizontal support rod (7) and the first angle support rod (6) have the same cross-sectional dimensions, the first angle support rod (6) and the second angle support rod (8) have the same specifications, the first anti-torsion support rod (5) and the second anti-torsion support rod (9) have the same specifications, and the first flat head connecting piece (13) and the second flat head connecting piece (12) have the same specifications.

5. A vertical axis wind turbine structure according to claim 3 or 4, characterized in that: The first angle support rod (6), the second angle support rod (8) and the horizontal support rod (7) are all provided with a semicircular curved surface on the same side as the leading edge of the blade (1).

6. A vertical axis wind turbine structure according to claim 3 or 4, characterized in that: between the generator (10) and the flat plate connection flange (4), between the flat plate connection flange (4) and the flange shaft (3), between the flange shaft (3) and the first angle connection flange (2), between the flat plate connection flange (4) and the horizontal support rod (7), between the horizontal support rod (7) and the second flat head connection piece (12), between the first angle connection flange (2) and the first angle support rod (6), between the first angle support rod (6) and the angle connection piece (14) on the upper part of the blade (1), between the first anti-torsion support rod (5) and the first flat head connection piece (13) on the upper part of the blade (1), ), between the generator (10) and the second angle connection flange (11), between the second angle connection flange (11) and the second angle support rod (8), between the second angle support rod (8) and the angle connection piece (14) at the bottom of the blade (1), between the second anti-torsion support rod (9) and the first flat head connection piece (13) at the bottom of the blade (1), between the angle connection piece (14) and the first flat head connection piece (13), between the angle connection piece (14) and the blade (1), and between the second flat head connection piece (12) and the blade (1) are all detachably connected via detachable pieces of the same specification.

7. A vertical axis wind turbine structure according to claim 6, characterized in that: The detachable part is a bolt.

8. A vertical axis wind turbine structure according to claim 3 or 4, characterized in that: The angle connecting piece (14) and the second flat-head connecting piece (12) are both pre-installed on the blade (1), and the first flat-head connecting piece (13) is pre-installed on the angle connecting piece (14).

9. A vertical axis wind turbine structure according to claim 2, characterized in that: The inclination angles of the connection ends of the first angle connection flange (2) and the second angle connection flange (11) are both 45 to 60 degrees.

10. A vertical axis wind turbine structure according to claim 1, characterized in that: The generator (10) is an axial flux generator or a radial flux generator.

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