Support structure for adjusting blade angle of wind turbine and wind turbine

Abstract

The utility model relates to wind driven generator technical field discloses a kind of adjustable fan blade angle of attack's support structure and wind driven generator, comprising: main shaft, blade assembly, support mechanism and adjusting mechanism, blade assembly includes multiple blade being set along the circumferential interval of main shaft;Support mechanism includes: first support piece and second support piece, first support piece and second support piece are set along the axial interval of main shaft, support piece includes: turntable and multiple connecting arms, the top end of blade is connected with first support piece, the bottom end of blade is connected with second support piece;Adjusting mechanism includes multiple adjusting piece, adjusting piece is set to the end of the connecting arm of first support piece and / or second support piece away from turntable, adjusting piece is equipped with multiple adjusting hole, the top end or bottom end of blade is provided with connecting hole, the utility model can adjust the angle of attack of blade for different wind environment, improve wind driven generator wind energy capture efficiency and electric energy conversion efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, specifically to a support structure for an adjustable wind turbine blade angle of attack and a wind turbine generator. Background Technology

[0002] A wind turbine is a device that converts wind energy into electrical energy and is widely used in areas rich in wind resources. Based on the direction of the rotor shaft, wind turbines are mainly divided into two categories: horizontal axis and vertical axis. Vertical axis wind turbines, due to their simple structure, insensitivity to wind direction, low noise, and ease of maintenance, have high application value in urban buildings, mountainous areas, and environments with variable wind directions. A vertical axis wind turbine typically consists of multiple airfoil blades, a blade support structure, a rotor shaft, and a transmission and power generation system. The blades rotate around the vertical axis under the influence of wind, driving the generator through the rotor shaft to output electrical energy.

[0003] In existing vertical axis wind turbines, blades are typically fixed by drilling holes in the blade surface and connecting them with bolts. This method results in a fixed blade angle of attack (the angle between the blade and the incoming wind direction), which cannot be adjusted according to actual wind conditions. However, in practical applications of wind turbines, wind conditions vary significantly across different regions and environments, requiring different optimal angles of attack for the blades. When facing changing wind conditions in different regions or at different times, it is difficult to adjust the blades according to the actual wind speed and direction. As a result, the blades operate at suboptimal angles of attack, reducing the wind energy capture efficiency and power conversion efficiency of wind power generation. Utility Model Content

[0004] In view of this, the present invention provides a support structure for adjustable wind turbine blade angle of attack and a wind turbine generator to solve the problem of low wind energy capture and power conversion efficiency of wind turbine generators.

[0005] In a first aspect, this utility model provides a support structure for adjustable fan blade angle of attack, comprising:

[0006] spindle;

[0007] A blade assembly, the blade assembly comprising a plurality of blades spaced circumferentially along the main shaft;

[0008] A support mechanism includes a first support member and a second support member, the first support member and the second support member being spaced apart along the axial direction of the main shaft. Each support member includes a turntable and a plurality of connecting arms. The turntable is disposed on the main shaft, and the plurality of connecting arms are spaced apart circumferentially along the turntable. The top end of the blade is connected to the end of the connecting arm of the first support member away from the turntable, and the bottom end of the blade is connected to the end of the connecting arm of the second support member away from the turntable.

[0009] An adjustment mechanism is provided, comprising multiple adjustment components. Each adjustment component is disposed at the end of the connecting arm of the first support and / or the second support away from the turntable. Each adjustment component has multiple adjustment holes spaced apart. The top or bottom end of the blade is provided with a connection hole. Fasteners are disposed in one of the adjustment holes and one of the corresponding connection holes.

[0010] Beneficial effects

[0011] The first and second support members provide stable connection support for the blade at the top and bottom of the blade, respectively. The blade angle of attack can be flexibly adjusted through the adjustment mechanism, so that the blade can be quickly and reliably adjusted according to the wind speed and direction in different regions and at different times. This ensures that the blade is in the optimal aerodynamic attitude, improves the wind energy capture efficiency of the blade and the power conversion efficiency of the wind turbine.

[0012] In one optional embodiment, the adjusting member is an arc-shaped adjusting plate, and the arc-shaped adjusting plate has a plurality of adjusting holes along its arc direction.

[0013] In one alternative embodiment, the center of the arc-shaped adjusting plate coincides with the rotation center of the blade.

[0014] Beneficial effects

[0015] During the adjustment of the blade angle of attack, the relative positional change between the adjustment hole and the blade connection hole is kept on the same arc path to prevent the connection position between the blade and the arc-shaped adjustment plate from being misaligned due to the deviation of the arc path.

[0016] In one optional embodiment, hinge holes are provided at the end of the connecting arm near the blade, at the leading edge of the top surface of the blade, and at the bottom surface of the blade. Hinge components are provided in the hinge holes corresponding to the top surface of the connecting arm and the blade, and in the hinge holes corresponding to the bottom surface of the connecting arm and the blade.

[0017] In one optional embodiment, the connecting hole is provided at the trailing edge of the top surface and the bottom surface of the blade, and the fastener passes through the adjusting hole and is fixedly connected to the connecting hole.

[0018] In one alternative embodiment, the width of the arc-shaped adjustment plate gradually decreases from one end near the connecting arm to the end away from the connecting arm.

[0019] In one optional embodiment, the support structure for the adjustable fan blade angle of attack further includes a tensioning mechanism, which comprises a fixed plate and a plurality of cables. The fixed plate is connected to the top end of the main shaft, and the plurality of cables are spaced apart circumferentially along the fixed plate. One end of each cable is connected to the fixed plate, and the other end is connected to the end of a connecting arm on the first support member away from the turntable.

[0020] Beneficial effects

[0021] Multiple tension cables are circumferentially arranged on the fixed plate to connect the fixed plate to each connecting arm. During wind turbine operation, these cables provide tension to the connecting arms, further enhancing their structural rigidity. The tension cables effectively resist wind loads and centrifugal forces generated by the rotation of the connecting arms, reducing the sway amplitude of the connecting arms during operation.

[0022] In one optional embodiment, the cable is provided with a first connecting plate and a second connecting plate at both ends. The first connecting plate is connected to the fixed plate, and the second connecting plate is connected to the end of the connecting arm away from the turntable. The two ends of the cable are respectively hinged to the first connecting plate and the second connecting plate.

[0023] In one optional embodiment, reinforcing ribs are provided on the top and bottom surfaces of the turntable, and reinforcing plates are provided on the top and bottom surfaces of the connecting arm.

[0024] Beneficial effects

[0025] Reinforcing ribs and plates significantly improve the structural strength and deformation resistance of the turntable and connecting arm, preventing them from breaking when subjected to wind loads, centrifugal forces, and vibration impacts generated during blade rotation. Simultaneously, reinforcing ribs and plates can evenly distribute stress on the turntable and connecting arm, improving their fatigue life.

[0026] Secondly, this utility model also provides a wind turbine generator, including the aforementioned adjustable wind turbine blade angle-of-attack support structure, and further including: a tower, a connecting cylinder, a generator, and a speed increaser. The bottom end of the connecting cylinder is connected to the top end of the tower. The connecting cylinder has a cavity. The generator and the speed increaser are disposed in the cavity, and the speed increaser is located above the generator. The bottom end of the main shaft is connected to the top end of the speed increaser, and the bottom end of the speed increaser is connected to the input end of the generator.

[0027] Beneficial effects

[0028] The connecting cylinder has an internal cavity to accommodate the generator and the speed increaser. The speed increaser is located above the generator, and the bottom end of the main shaft is connected to the speed increaser. The speed increaser is connected to the generator, so that after the wind energy drives the main shaft to rotate through the blades, the energy is efficiently transferred to the generator through the speed increaser, which improves the efficiency of wind power generation. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the structure of a wind turbine generator according to an embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of a support structure for an adjustable fan blade angle of attack according to an embodiment of the present utility model;

[0032] Figure 3 for Figure 2 A magnified view of part A in the diagram.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Spindle;

[0035] 21. Leaves;

[0036] 31. First support component; 311. Turntable; 312. Connecting arm; 32. Second support component; 33. Hinge component; 34. Reinforcing rib ring; 35. Reinforcing rib plate.

[0037] 41. Adjusting component; 42. Adjusting hole; 43. Fastener;

[0038] 51. Fixed plate; 52. Cable; 53. First connecting plate; 54. Second connecting plate;

[0039] 6. Tower;

[0040] 7. Connecting cylinder;

[0041] 8. Generator;

[0042] 9. Couplings. Detailed Implementation

[0043] 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.

[0044] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.

[0045] According to an embodiment of the present invention, in one aspect, a support structure for an adjustable fan blade angle of attack is provided, comprising: a main shaft 1, a blade 21 assembly, a support mechanism, and an adjustment mechanism. The blade 21 assembly includes a plurality of blades 21 spaced circumferentially along the main shaft 1. The support mechanism includes: a first support member 31 and a second support member 32, which are spaced axially along the main shaft 1. The support member includes: a turntable 311 and a plurality of connecting arms 312. The turntable 311 is disposed on the main shaft 1, and the plurality of connecting arms 312 are spaced circumferentially along the turntable 311. The top end of blade 21 is connected to the end of the connecting arm 312 of the first support member 31 away from the turntable 311, and the bottom end of blade 21 is connected to the end of the connecting arm 312 of the second support member 32 away from the turntable 311. The adjustment mechanism includes multiple adjustment members 41, which are located at the ends of the connecting arms 312 of the first support member 31 and / or the second support member 32 away from the turntable 311. Each adjustment member 41 has multiple adjustment holes 42 spaced apart. The top or bottom end of blade 21 is provided with a connection hole. Fastener 43 is provided in one adjustment hole 42 and a corresponding connection hole.

[0046] Specifically, a first support member 31 and a second support member 32 are sequentially provided on the main shaft 1, and the two are arranged at intervals along the axial direction of the main shaft 1. The first support member 31 and the second support member 32 each include a circular turntable 311 fixed on the main shaft 1, and a plurality of connecting arms 312 extending from the edge of the turntable 311 outwards, and the plurality of connecting arms 312 are evenly distributed in the circumferential direction of the turntable 311.

[0047] Multiple blades 21 are arranged circumferentially along the main shaft 1. The top end of each blade 21 is rotatably connected to the end of the corresponding connecting arm 312 of the first support member 31 away from the turntable 311, and the bottom end is rotatably connected to the end of the corresponding connecting arm 312 of the second support member 32 away from the turntable 311. The blade body is an aerodynamic airfoil blade 21, used to capture wind energy and drive the main shaft 1 to rotate.

[0048] The adjusting member 41 has multiple adjusting holes 42 arranged at intervals. The top and / or bottom of the blade 21 has connecting holes. The blade 21 is connected to the adjusting member 41 by fasteners 43, so that any one of the adjusting holes 42 is aligned with and fixed to the connecting hole on the blade 21. This allows for adjustable angle of attack of the blade 21. In this embodiment, the support member has four connecting arms 312. The first support member 31 and the second support member 32 are respectively connected to the four blades 21, and each connecting arm 312 of the first support member 31 and the second support member 32 is provided with an adjusting member 41.

[0049] The first support member 31 and the second support member 32 clamp and support both ends of the blade 21, improving the vibration resistance and durability of the wind turbine support structure. The adjustment mechanism is located at the end of the connecting arm 312 away from the turntable 311. In conjunction with the connecting hole at the end of the blade 21 and the fastener 43, it can quickly adjust the angle of attack of the blade 21, so that the blade 21 is in the optimal aerodynamic attitude and improves the wind energy capture efficiency of the blade 21.

[0050] In one embodiment, the top and bottom surfaces of the turntable 311 are provided with reinforcing rib rings 34, and the top and bottom surfaces of the connecting arm 312 are provided with reinforcing rib plates 35.

[0051] Specifically, reinforcing ribs 34 are welded to the top and bottom surfaces of the turntable 311 and are arranged coaxially with the turntable 311 in a circular structure, effectively enhancing the radial and circumferential rigidity of the turntable 311 and improving its ability to withstand centrifugal force and torsional moment. Reinforcing ribs 35 are provided on the top and bottom surfaces of each connecting arm 312, extending along the length of the connecting arm 312. The reinforcing ribs 35 are made of hollow wooden reinforcing boards with an internal cavity structure, reducing weight while improving bending rigidity. Simultaneously, the surface of the reinforcing ribs 35 is coated with a carbon fiber protective coating.

[0052] In one embodiment, the adjusting member 41 is an arc-shaped adjusting plate, and a plurality of adjusting holes 42 are provided on the arc-shaped adjusting plate along its arc direction.

[0053] Specifically, the arc-shaped adjustment plate is made of rigid metal material and has an overall arc-shaped strip structure, with the arc direction facing the rotation direction of the blade 21. One end of the arc-shaped adjustment plate is fixedly connected to the connecting arm 312 by screws, and the other end extends along the arc to the top surface of the blade 21. Multiple adjustment holes 42 are spaced apart along the arc direction at the end of the arc-shaped adjustment plate near the blade 21, for engaging with the connecting holes at the end of the blade 21. By installing fasteners 43 at different positions of the adjustment holes 42, the angle of attack of the blade 21 can be adjusted.

[0054] In one embodiment, the width of the arc-shaped adjustment plate gradually decreases from the end near the connecting arm 312 to the end away from the connecting arm 312.

[0055] Specifically, the width of the arc-shaped adjustment plate gradually changes along its arc direction, narrowing from the end closer to the connecting arm 312 to the end farther away from the connecting arm 312.

[0056] In one embodiment, hinge holes are provided at one end of the connecting arm 312 near the blade 21, at the leading edge of the top surface and the bottom surface of the blade 21, and hinge members 33 are provided in the hinge holes corresponding to the top surface of the connecting arm 312 and the bottom surface of the blade 21.

[0057] Specifically, the end of the connecting arm 312 furthest from the turntable 311 has a hinge hole for hinged connection, and the leading edges of the top and bottom surfaces of the blade 21 are correspondingly provided with hinge holes. All hinge holes are circular through holes for inserting the hinge member 33. The hinge member 33 is a metal round shaft pin, with a limit ring on the pin to axially limit the hinge member 33. After one end of the hinge member 33 is inserted through the hinge hole of the connecting arm 312, it continues through to the hinge hole of the blade 21, achieving a hinged connection between the blade 21 and the connecting arm 312.

[0058] In one embodiment, the trailing edge of the top and bottom surfaces of the blade 21 is provided with a connecting hole, and the fastener 43 passes through the adjustment hole 42 and is fixedly connected to the connecting hole.

[0059] Specifically, connecting holes are provided at the trailing edges of the top and bottom surfaces of the blade 21. The adjusting holes 42 on the adjusting component 41 are pre-arranged at a certain arc spacing. When installing the blade 21, the corresponding adjusting hole 42 is aligned with the connecting hole according to the required angle of attack. The fastener 43 is a fastening bolt, which passes through the adjusting hole 42 on the adjusting component 41 and the connecting hole on the blade 21 in sequence, and is then tightened by rotation.

[0060] In one embodiment, the center of the arc-shaped adjustment plate coincides with the rotation center of the blade 21.

[0061] Specifically, the center of the arc of the arc-shaped adjustment plate coincides with the rotation center of the blade 21 when it rotates around the connecting arm 312, so that each adjustment hole 42 is always located on the rotation path of the blade 21 end during the adjustment of the angle of attack of the blade 21, thus achieving precise docking between the connecting hole and the adjustment hole 42.

[0062] In one embodiment, the support structure for the adjustable fan blade angle of attack 21 further includes a tensioning mechanism. The tensioning mechanism includes a fixed plate 51 and a plurality of cables 52. The fixed plate 51 is connected to the top end of the main shaft 1. The plurality of cables 52 are spaced apart circumferentially along the fixed plate 51. One end of each cable 52 is connected to the fixed plate 51, and the other end is connected to the end of a connecting arm 312 on the first support member 31 away from the turntable 311.

[0063] Specifically, the top end of the main shaft 1 is welded and fixed to the bottom axis of the fixed plate 51. Multiple cables 52 are symmetrically distributed around the circumference of the fixed plate 51. One end of each cable 52 is fixedly connected to the edge of the fixed plate 51, and the other end extends to the end of the connecting arm 312 away from the turntable 311 and is fixedly connected thereto.

[0064] During the rotation of the blade 21, the cable 52 tensions the connecting arm 312, offsetting some of the structural deformation caused by the centrifugal force of the blade 21's rotation, and improving the connecting arm 312's anti-sway capability and structural rigidity.

[0065] In one embodiment, the two ends of the cable 52 are provided with a first connecting plate 53 and a second connecting plate 54. The first connecting plate 53 is connected to the fixed plate 51, and the second connecting plate 54 is connected to the end of the connecting arm 312 away from the turntable 311. The two ends of the cable 52 are respectively hinged to the first connecting plate 53 and the second connecting plate 54.

[0066] Specifically, the first connecting plate 53 is a flat metal plate structure, which is fixed to the edge of the fixed plate 51 by screws and has a round hole for hinge; the second connecting plate 54 is also a flat metal plate structure, which is fixed to the end of the connecting arm 312 of the first support member 31 away from the turntable 311 by screws and also has a hinge hole.

[0067] The two ends of the cable 52 are connected to the hinge holes of the first connecting plate 53 and the second connecting plate 54 via pins, forming a flexible hinged connection. The cable 52 can adaptively adjust to minor deformations or vibrations generated during the operation of the wind turbine within a certain range.

[0068] In other embodiments, the two ends of the cable 52 can also be connected to the top of the fixed plate 51 and the blade 21 via an anchoring structure. The two ends of the cable 52 are provided with an expansion sleeve connection structure, the outer shell of which is inserted into a pre-set sleeve hole on the top surface of the fixed plate 51 and the top of the blade 21, and automatically locked by the expansion sleeve connection structure. Alternatively, the cable 52 can be directly fixed to the top of the fixed plate 51 and the blade 21 via pins, ensuring a firm and reliable connection.

[0069] According to an embodiment of the present invention, another aspect provides a wind turbine generator, including a support structure for adjustable wind turbine blades 21 with an angle of attack, and further including: a tower 6, a connecting cylinder 7, a generator 8, and a speed increaser. The bottom end of the connecting cylinder 7 is connected to the top end of the tower 6. The connecting cylinder has a cavity. The generator 8 and the speed increaser are disposed in the cavity, and the speed increaser is located above the generator 8. The bottom end of the main shaft 1 is connected to the top end of the speed increaser, and the bottom end of the speed increaser is connected to the input end of the generator 8.

[0070] Specifically, tower 6 supports the entire wind turbine. The bottom end of connecting cylinder 7 has a slot that matches the top end of tower 6; the top end of tower 6 is inserted into the slot and fixedly connected to connecting cylinder 7. Generator 8 and speed increaser are installed inside the cavity of connecting cylinder 7, with the speed increaser located above generator 8, and the two are connected by coupling 9. Main shaft 1 extends through the cavity from the upper end of connecting cylinder 7, and its bottom end is connected to the output shaft of speed increaser via coupling 9. Multiple axial bearings are arranged along the bottom end of main shaft 1, while the input shaft of speed increaser is connected to the rotor shaft of generator 8. Multiple heat dissipation vents are symmetrically arranged circumferentially on the side wall of connecting cylinder 7, and heat dissipation windows are installed on these vents.

[0071] Working process: When wind is present in the environment, multiple blades 21 evenly arranged around the main axis 1 generate lift under the action of the wind, thereby driving the entire wind turbine blade 21 support structure to rotate. The blades 21 are stably connected by connecting arms 312 on the first support member 31 and the second support member 32, ensuring that the blades 21 have good structural rigidity and dynamic balance performance during rotation.

[0072] During the installation or maintenance of wind turbines, workers can adjust the installation angle of the blades 21 using the adjustment mechanism according to local wind conditions. The target adjustment hole 42 on the selected adjustment component 41 is aligned with the connection hole at the trailing edge of the blade 21, and the two are fixed together using fasteners 43 to complete the adjustment of the blade 21's angle of attack.

[0073] The rotating main shaft 1 transmits kinetic energy to the speed increaser inside the connecting cylinder 7. The speed increaser accelerates the low-speed rotational motion input to the main shaft 1 to reach the operating speed required by the generator 8. The output shaft of the speed increaser is connected to the input shaft of the generator 8. The accelerated mechanical energy is transmitted to the generator 8, driving the rotor of the generator 8 to rotate, thereby generating current and realizing the conversion of wind energy into electrical energy.

[0074] 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 support structure for adjustable fan blade angle of attack, characterized in that, include: Main spindle (1); A blade (21) assembly comprising a plurality of blades (21) spaced circumferentially along the main shaft (1); The support mechanism includes a first support member (31) and a second support member (32), the first support member (31) and the second support member (32) being spaced apart along the axial direction of the main shaft (1), the support member including a turntable (311) and a plurality of connecting arms (312), the turntable (311) being disposed on the main shaft (1), the plurality of connecting arms (312) being spaced apart circumferentially along the turntable (311), and the top end of the blade (21) being connected to the end of the connecting arm (312) of the first support member (31) away from the turntable (311), and the bottom end of the blade (21) being connected to the end of the connecting arm (312) of the second support member (32) away from the turntable (311); The adjustment mechanism includes multiple adjustment components (41). The adjustment components (41) are disposed at the end of the connecting arm (312) of the first support (31) and / or the second support (32) away from the turntable (311). Each adjustment component (41) is provided with multiple adjustment holes (42) spaced apart. The top or bottom end of the blade (21) is provided with a connecting hole. The fastener (43) is disposed in one of the adjustment holes (42) and one of the corresponding connecting holes.

2. The support structure for the adjustable fan blade angle of attack according to claim 1, characterized in that, The adjusting component (41) is an arc-shaped adjusting plate, and the arc-shaped adjusting plate has a plurality of adjusting holes (42) along its arc direction.

3. The support structure for the adjustable fan blade angle of attack according to claim 2, characterized in that, The center of the arc-shaped adjustment plate coincides with the rotation center of the blade (21).

4. The support structure for the adjustable fan blade angle of attack according to claim 2, characterized in that, Hinge holes are provided at one end of the connecting arm (312) near the blade (21), at the leading edge of the top surface of the blade (21), and at the bottom surface of the blade (21). Hinge members (33) are provided in the hinge holes corresponding to the top surface of the connecting arm (312) and the blade (21) and the hinge holes corresponding to the bottom surface of the connecting arm (312) and the blade (21).

5. The support structure for the adjustable fan blade angle of attack according to claim 3, characterized in that, The connecting hole is provided at the rear edge of the top surface and the bottom surface of the blade (21), and the fastener (43) passes through the adjusting hole (42) and is fixedly connected to the connecting hole.

6. The support structure for the adjustable fan blade angle of attack according to claim 2, characterized in that, The width of the arc-shaped adjustment plate gradually decreases from the end closest to the connecting arm (312) to the end furthest from the connecting arm (312).

7. The support structure for the adjustable fan blade angle of attack according to claim 1, characterized in that, It also includes a tensioning mechanism, which includes a fixed plate (51) and a plurality of cables (52). The fixed plate (51) is connected to the top end of the main shaft (1). The plurality of cables (52) are arranged at intervals along the circumference of the fixed plate (51). One end of each cable (52) is connected to the fixed plate (51), and the other end is connected to the end of a connecting arm (312) on the first support member (31) away from the turntable (311).

8. The support structure for the adjustable fan blade angle of attack according to claim 7, characterized in that, The cable (52) is provided with a first connecting plate (53) and a second connecting plate (54) at both ends. The first connecting plate (53) is connected to the fixed plate (51), and the second connecting plate (54) is connected to the end of the connecting arm (312) away from the turntable (311). The two ends of the cable (52) are respectively hinged to the first connecting plate (53) and the second connecting plate (54).

9. The support structure for the adjustable fan blade angle of attack according to claim 1, characterized in that, The top and bottom surfaces of the turntable (311) are provided with reinforcing rib rings (34), and the top and bottom surfaces of the connecting arm (312) are provided with reinforcing rib plates (35).

10. A wind turbine generator, comprising a support structure for the adjustable wind turbine blade (21) angle of attack as described in any one of claims 1-9, characterized in that, Also includes: The tower (6), connecting cylinder (7), generator (8) and speed increaser are provided. The bottom end of the connecting cylinder (7) is connected to the top end of the tower (6). The connecting cylinder has a cavity. The generator (8) and the speed increaser are located in the cavity, and the speed increaser is located above the generator (8). The bottom end of the main shaft (1) is connected to the top end of the speed increaser, and the bottom end of the speed increaser is connected to the input end of the generator (8).

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