Wind driven generator with blade self-adaptive variable angle function
Through pure mechanical structure design, the blades adaptively rotate in a variable angle, which solves the problem that the blades in wind turbines cannot automatically adapt to the airflow, and achieves efficient use of wind energy, reduces costs and improves safety.
Patent Information
- Application Number
- CN202422642535.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In existing wind turbines, the stress surface of each blade cannot automatically adapt to the flow direction of the airflow, and complex wind speed calculations and servo motor drive adjustments are required, resulting in high production costs and weak ability to adapt to the airflow.
The pure mechanical structure design allows the blade to adapt to the wind direction and angle rotation. Through the cooperation of the stop and the rotation shaft, the blade switches the force surface at different positions and automatically adjusts the angle to adapt to the airflow, so as to achieve a large downwind thrust and low backwind resistance during the rotation of the impeller module.
No additional power drive structure and complex calculations are required, reducing production costs, improving wind energy utilization, enhancing airflow adaptability, and improving the safety and service life of wind turbines.
Smart Images
Figure CN223177669U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind turbines, in particular to a wind turbine with a blade adaptive angle-changing function. Background Art
[0002] The working principle of a wind turbine is that the impeller module rotates under the action of wind impact, which converts the kinetic energy of the wind into the mechanical energy of the impeller module. The wind turbine rotates and generates electricity under the drive of the impeller module.
[0003] However, the load-bearing surface of each blade in existing wind turbines cannot automatically adapt to the flow direction of the airflow. In order to adapt to the incoming wind direction, complex wind direction and speed calculations and servo motor drive are required to adjust the blades to the wind direction. As a result, the production cost of the wind turbine is high and the impeller module has weak ability to adapt to airflow. Utility Model Content
[0004] The main purpose of the utility model is to provide a wind turbine with a blade adaptive angle-changing function, aiming to achieve the function of enabling the blades to adaptively rotate at a variable angle in wind direction through a purely mechanical structure, thereby having a strong ability to adapt to airflow and reducing production costs.
[0005] To achieve the above-mentioned purpose, the present invention proposes a wind turbine with a blade adaptive angle-changing function, comprising:
[0006] A frame, on which a generator module is installed;
[0007] An impeller module includes a frame and a plurality of blades, wherein the frame is rotatably connected to the generator module, a plurality of rotating shafts are mounted on the frame, and the plurality of blades are rotatably connected to the plurality of rotating shafts in a one-to-one manner, wherein the blades have a first force-bearing surface and a second force-bearing surface, and a stopper is provided on the frame, wherein the stopper can block one side of the blade;
[0008] Along the wind direction, the symmetry line of the frame is used as the dividing line; when the blade is on the first side of the dividing line, the first force-bearing surface faces the wind direction, and the blade is pressed on the stop block by the wind force; when the blade is close to the top of the dividing line, the force-bearing surface of the blade is switched from the first force-bearing surface to the second force-bearing surface, and the blade is flipped around the rotation axis by the wind force, and the blade is parallel to the wind direction; when the blade is on the second side of the dividing line, the blade is parallel to the wind direction; when the blade is close to the bottom of the dividing line, the first force-bearing surface faces the wind direction, and the blade is pressed on the stop block by the wind force.
[0009] Preferably, the blade is divided into a first sub-blade and a second sub-blade with the axis of the rotating shaft as a dividing line, and the width of the first sub-blade is greater than the width of the second sub-blade.
[0010] Preferably, the stopper is telescopically arranged on the frame body, so that the stopper has a blocking state and a releasing state. In the blocking state, the blade presses on the stopper; when the pressure of the blade on the stopper is too large, the stopper changes from the blocking state to the releasing state; in the releasing state, the blade is released by the stopper and becomes a free state.
[0011] Preferably, in the blocking state, the distance between the stopper and the rotating shaft is less than the width of the first sub-blade, and the distance between the stopper and the rotating shaft is greater than the width of the second sub-blade; in the releasing state, the distance between the stopper and the rotating shaft is greater than the width of the first sub-blade, and the distance between the stopper and the rotating shaft is greater than the width of the second sub-blade.
[0012] Preferably, a fixing block is further arranged on the frame body. A receiving groove is arranged in the fixing block, and a spring is arranged in the receiving groove. The spring is arranged between the stopper and the inner wall of the fixing block on the side away from the stopper.
[0013] Preferably, a guiding groove is arranged on the stopper, and a protruding strip is arranged in the receiving groove of the fixing block. The stopper can slide in the receiving groove by the adaptation of the protruding strip and the guiding groove.
[0014] Preferably, the shape of the blade is a rectangular plate.
[0015] Preferably, the first sub-blade is 1 / 3 of the blade, and the second sub-blade is 2 / 3 of the blade.
[0016] Preferably, the number of the blades is 3 or 4.
[0017] Preferably, the frame body includes an impeller shaft and a plurality of rotating arms fixedly connected to the side wall of the impeller shaft. The impeller shaft is rotatably connected to the generator module. The plurality of rotating arms are evenly arranged at intervals along the circumferential direction of the impeller shaft, and the rotating shaft is installed on each rotating arm.
[0018] Compared with the prior art, for the wind turbine of the technical solution of the present utility model, during the clockwise rotation of the impeller module, when the blade is on the left side of the demarcation line, the blade on the left side is blocked by the stopper, providing assistance for the clockwise rotation of the impeller module. As the impeller module continues to rotate clockwise, the blade is always pressed on the stopper, and the angle between the blade and the incoming wind direction gradually increases. The blade has a good wind-receiving area, providing assistance for the clockwise rotation of the impeller module. When the blade rotates to the top of the demarcation line, the force-receiving surface of the blade is converted from the first force-receiving surface to the second force-receiving surface. The force-receiving surface of the blade changes, and the blade is reversed under the action of the wind force, and the positions of the two sides of the blade are interchanged, making the blade parallel to the wind direction. Subsequently, during the clockwise rotation of the impeller module, when the blade rotates to the right side of the demarcation line, it is always parallel to the wind direction, reducing resistance and automatically adapting to the airflow. As the impeller module continues to rotate clockwise, when the blade reaches the bottom of the demarcation line, the blade is again pressed on the stopper under the action of the wind force, providing assistance for the rotation of the blade again. With such a setting, the wind turbine of the present utility model uses the wind power reasonably through its own pure mechanical structure, without the need for additional power drive structure settings, without complex wind direction and wind speed calculations and servo motor drives, enabling each blade to automatically adjust its own angle under the drive of the wind force, and the power angle adapts to the wind direction change, realizing that the blade has a large forward thrust and a small reverse resistance during the rotation of the impeller module, a large thrust on one side and a small resistance on the other side, maximizing the utilization of mechanical energy, having a better ability to adapt to the airflow, improving the wind energy utilization rate, and reducing the production cost of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural diagram of the wind turbine of the present utility model;
[0020] Figure 2 is a schematic structural diagram of the impeller module in the wind turbine of the present utility model;
[0021] Figure 3 is a top view of the first rotation state of the wind turbine of the present utility model;
[0022] Figure 4 is a top view of the second rotation state of the wind turbine of the present utility model;
[0023] Figure 5 is a top view of the third rotation state of the wind turbine of the present utility model;
[0024] Figure 6 is a top view of the fourth rotation state of the wind turbine of the present utility model;
[0025] Figure 7 is a rotation schematic diagram of the wind turbine of the present utility model;
[0026] Figure 8 is a schematic structural diagram of the fixing block of the wind turbine of the present utility model;
[0027] Figure 9 This is a schematic structural diagram of the stopper and spring of the wind turbine of the present utility model.
[0028] Explanation of the reference numerals in the drawings: 100, frame; 200, generator module; 110, frame body; 120, blade; 130, rotating shaft; 101, demarcation line; 121, first sub-blade; 122, second sub-blade; 140, stopper; 123, first stress surface; 124, second stress surface; 111, impeller shaft; 112, rotating arm; 113, first reinforcing strip; 114, second reinforcing strip; 101, first blade; 102, second blade; 103, third blade; 300, fixing block; 311, receiving groove; 320, spring; 141, guiding groove; 330, rib. Specific embodiments
[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0030] Please refer to Figures 1 to 9 , the present utility model proposes a wind turbine with the function of self-adaptive variable angle of the blade 120.
[0031] The wind turbine includes a frame 100 and an impeller module, and a generator module 200 is installed on the frame 100; the impeller module includes a frame body 110 and a plurality of blades 120, the frame body 110 is rotatably connected to the generator module 200, a plurality of rotating shafts 130 are installed on the frame body 110, and a plurality of blades 120 are rotatably connected to the plurality of rotating shafts 130 one by one. The blade 120 has a first stress surface 123 and a second stress surface 124, and a stopper 140 is arranged on the frame body 110. The stopper 140 can block one side of the blade 120; along the wind direction, the symmetry line of the frame 100 is used as the demarcation line 101; when the blade 120 is on the first side of the demarcation line 101, the first stress surface 123 faces the wind direction, and the blade 120 is pressed against the stopper 140 by the wind force; when the blade 120 is near the top of the demarcation line 101, the stress surface of the blade 120 is switched from the first stress surface 123 to the second stress surface 124, and the blade 120 is flipped around the rotating shaft 130 by the wind force, and the blade 120 is parallel to the wind direction; when the blade 120 is on the second side of the demarcation line 101, the blade 120 is parallel to the wind direction; when the blade 120 is near the bottom of the demarcation line 101, the first stress surface 123 faces the wind direction, and the blade 120 is pressed against the stopper 140 by the wind force.
[0032] Specifically, under the drive of wind power, the blade 120 drives the entire impeller module to rotate around the central axis of the generator module 200. Through the rotation of the impeller module and the action of the internal structure of the generator module 200, the generator module 200 can generate electricity. Of course, the impeller module can also be disassembled and used alone, applied to other force transmission mechanisms, and transmit the mechanical energy of the impeller module rotating under wind power to the outside, all within the protection scope of the present utility model.
[0033] The wind turbine of the present utility model can achieve the self-adaptive variable angle of the blade 120, improve the ability of the blade 120 to adapt to the air flow, and improve the wind energy utilization rate. As Figure 7 shown, define the first side of the demarcation line 101 as the left side, and the second side of the demarcation line 101 as the right side. Figure 7 In the figure, the wind direction is from front to back according to the two triangles. From left to right are the schematic diagrams of four different rotation states during the clockwise rotation of the impeller module, and they are respectively Figure 3 , Figure 4 , Figure 5 , Figure 6 The schematic diagrams of the rotation states. Among them, in the reference numerals, 101 is the first blade, 102 is the second blade, and 103 is the third blade. During the clockwise rotation of the impeller module, when the blade 120 is on the left side of the demarcation line 101, the blade 120 on the left side is blocked by the stopper 140, providing assistance for the clockwise rotation of the impeller module. As the impeller module continues to rotate clockwise, the blade 120 is always pressed on the stopper 140, and the angle between the blade 120 and the oncoming wind direction gradually increases. The blade 120 has a good wind-receiving area, providing assistance for the clockwise rotation of the impeller module; when the blade 120 rotates to the top of the demarcation line 101, the force-receiving surface of the blade 120 is converted from the first force-receiving surface 123 to the second force-receiving surface 124. The force-receiving surface of the blade 120 changes, and the blade 120 is reversed under the action of wind force. The positions of the two sides of the blade 120 are interchanged, making the blade 120 parallel to the wind direction. Subsequently, during the clockwise rotation of the impeller module, when the blade 120 rotates to the right side of the demarcation line 101, it is always parallel to the wind direction, reducing resistance and automatically adapting to the air flow. As the impeller module continues to rotate clockwise, when the blade 120 comes to the bottom of the demarcation line 101, the blade 120 is again pressed on the stopper 140 under the action of wind force, providing assistance for the rotation of the blade 120 again. With such a setting, the wind turbine of the present utility model reasonably utilizes wind power through its own pure mechanical structure, without the need for additional power drive structure settings, without complex wind direction and wind speed calculations and servo motor drives, enabling each blade 120 to automatically adjust its own angle under the drive of wind power, the power angle to adapt to the wind direction change, achieving that the blade 120 has a large forward thrust and a small reverse resistance during the rotation of the impeller module, a large thrust on one side and a small resistance on the other side, maximizing the utilization of mechanical energy, having a better ability to adapt to the air flow, improving the wind energy utilization rate, and reducing the wind turbine.
[0034] Please refer to Figures 1 to 2 , preferably, the blade 120 is divided into a first sub-blade 121 and a second sub-blade 122 with the axis of the rotation axis 130 as the dividing line, and the width of the first sub-blade 121 is greater than the width of the second sub-blade 122. In this way, under the wind force, the force on the first sub-blade 121 part is greater than the force on the second sub-blade 122 part, so that the blade 120 can rotate around the rotation axis 130 by an angle to adapt to the wind direction. At the same time, when the impeller module rotates clockwise to the top of the dividing line 101, the second force-receiving surface 124 of the blade 120 is affected by the wind force, and the force on the first sub-blade 121 part is greater than the force on the second sub-blade 122 part, and the blade 120 can rotate clockwise around the rotation axis 130 to a position parallel to the wind direction, reducing the resistance.
[0035] It should be noted that in severe weather with strong winds, the wind speed is very high, and the wind turbine may be damaged to varying degrees. The stability and safety of the equipment should be ensured during the installation, maintenance and operation of the wind turbine.
[0036] Please refer to Figure 1 , Figure 8 and Figure 9 , in order to improve the safety of the wind turbine in strong wind weather, preferably, the stop block 140 is telescopically arranged on the frame body 110, so that the stop block 140 has a blocking state and a release state. In the blocking state, the blade 120 is pressed on the stop block 140; when the pressure on the stop block 140 from the blade 120 is too large, the stop block 140 changes from the blocking state to the release state; in the release state, the blade 120 is released by the stop block 140 to a free state. Specifically, the stop block 140 can be used as an automatic protection device for the wind turbine of the present invention. In severe weather with strong winds, the blade 120 can be pressed by the strong wind pressure to squeeze the stop block 140, so that the stop block 140 changes from the blocking state to the release state, so that the stop block 140 unloads the force on the blade 120, and the blade 120 swings freely with the wind direction or is parallel to the wind direction, so that the stop block 140 cannot provide resistance to the blade 120, and the thrust of the wind on the blade 120 is instantly reduced, and the rotation speed of the impeller module gradually stops, preventing the parts of the generator module 200 from being damaged due to too fast rotation speed of the impeller module, and improving the safety of the wind turbine.
[0037] Please refer to Figure 1 , Figure 8 and Figure 9Preferably, in the blocking position, the distance between stopper 140 and rotation axis 130 is less than the width of the first sub-blade 121, and greater than the width of the second sub-blade 122. In the released position, the distance between stopper 140 and rotation axis 130 is greater than the width of the first sub-blade 121, and greater than the width of the second sub-blade 122. In this way, when stopper 140 is in the blocking position, it prevents the second sub-blade 122 from rotating while blocking the first sub-blade 121 from rotating. This ensures that blade 120 can utilize the impact of airflow to adaptively adjust its angle to the optimal angle at different positions as the impeller module rotates, thereby improving wind energy utilization. When stopper 140 is in the released position, it prevents the first and second sub-blades 121, 122 from rotating, automatically activating the wind turbine's protection mechanism in strong winds.
[0038] See also Figure 1 、 Figure 8 as well as Figure 9 Preferably, a fixing block 300 is further provided on the frame 110 , a receiving groove 311 is provided in the fixing block 300 , a spring 320 is provided in the receiving groove 311 , and the spring 320 is provided between the stopper 140 and the inner wall of the fixing block 300 away from the stopper 140 . Specifically, the elastic force of the spring 320 is set according to the local wind force and the bearing capacity of the internal parts of the wind turbine. When the block 140 is in the blocking state, the spring 320 is in the initial state without elastic force; when the strong wind force exceeds the pre-calculated limit value, the wind turbine automatically starts the protection mechanism through the block 140, and the block 140 is squeezed by the blade 120 under force, and the spring 320 is compressed and deformed. The block 140 is turned to the released state and retracted into the accommodating groove 311, and the blade 120 is released to a free state. The blade 120 swings with the wind at this time, so that the thrust provided by the blade 120 to the rotation of the impeller module is reduced, and the rotation of the impeller module approaches to stop. Finally, the spring 320 rebounds and drives the block 140 to return to the blocking state. When the impeller module rotates again, as long as the strong wind force is less than the pre-calculated limit value, the blade 120 can still cover the block 140 to provide thrust when it is downwind, without the need for manual maintenance. In this way, the wind turbine can automatically activate the protection mechanism under strong winds, thereby improving the wind turbine's wind resistance and extending its service life. Of course, the block 140 can also be configured to be retracted into the receiving groove 311 at one time. For example, a strong plastic strip or steel bar is provided in the receiving groove 311 and connected to the block 140. When the pressure exerted by the blade 120 on the block 140 exceeds a pre-calculated limit value, the plastic strip or steel bar directly breaks, causing the block 140 to directly release the blade 120, thereby eliminating the effect of causing resistance to the blade 120, allowing the blade 120 to swing freely with the wind and transform into a free state.
[0039] Please refer to Figures 8 to 9 , to ensure that the stopper 140 can slide smoothly. Preferably, a guide groove 141 is provided on the stopper 140, and a rib 330 is provided on the fixed block 300 in the receiving groove 311. The stopper 140 can slide in the receiving groove 311 by adapting the rib 330 to the guide groove 141. In this way, the stopper 140 can slide through the rib 330 in the guide groove 141 to ensure the smoothness when the stopper 140 slides from the blocking state to the release state. At the same time, in order to facilitate the blade 120 to push the stopper 140 to slide, the stopper 140 can be provided with a round head, and the cross-section of the stopper 140 is preferably set as a sector.
[0040] The shape of the blade 120 can be various, it can be a rectangular plate or a square plate. Preferably, please refer to Figure 1 , the shape of the blade 120 is a rectangular plate. In this way, when the impeller module rotates clockwise, the blade 120 on the right side of the demarcation line 101 is completely parallel to the external force direction to reduce resistance, and the blade 120 on the left side of the demarcation line 101 ensures the driving force of the wind on the blade 120, so that the wind can push the blade 120 to drive the entire impeller module to rotate for power generation.
[0041] To ensure that the force on the first sub-blade 121 part is greater than the force on the second sub-blade 122 part, preferably, please refer to Figure 1 , the first sub-blade 121 is 1 / 3 of the blade 120, and the second sub-blade 122 is 2 / 3 of the blade 120. In this way, under the wind force, in each blade 120, the first sub-blade 121 bears 1 / 3 of the force, and the second sub-blade 122 bears 2 / 3 of the force, making the forces on both sides of the rotation axis 130 of the blade 120 uneven, and the blade 120 can well adaptively rotate at a variable angle. Of course, in other embodiments, the first sub-blade 121 can also be 1 / 4 of the blade 120, and the second sub-blade 122 is 3 / 4 of the blade 120, as long as the blade 120 can adaptively rotate at a variable angle is ensured. In this solution, the shapes of both the first sub-blade 121 and the second sub-blade 122 are rectangular plates.
[0042] The number of blades 120 is not limited. To improve the thrust of the impeller module and reduce resistance at the same time, preferably, the number of blades 120 is 3 or 4. In this solution, the number of blades 120 is 3.
[0043] Please refer to Figures 1 to 2, preferably, the frame 110 includes an impeller shaft 111 and a plurality of rotating arms 112 fixedly connected to the side wall of the impeller shaft 111. The impeller shaft 111 is rotatably connected to the generator module 200. The plurality of rotating arms 112 are evenly spaced along the circumferential direction of the impeller shaft 111, and a rotating shaft 130 is installed on each rotating arm 112. Specifically, under the action of wind force, the blade 120 drives the rotating arm 112 and the impeller shaft 111 to rotate relative to the generator module 200, realizing the power generation of the generator module 200. In this embodiment, the included angle formed between the respective rotating arms 112 is 120 degrees. In this way, the respective rotating arms 112 are evenly spaced, maintaining a proper density between the respective rotating arms 112, and preventing the force of fluid flow from being weakened due to the denseness of the rotating arms 112 during the rotation of the rotating arms 112. The included angle between the respective rotating arms 112 depends on the number of rotating arms 112. For example, when the number of rotating arms 112 is four, the included angle between the respective rotating arms 112 is 90 degrees. To ensure the structural strength between the respective rotating arms 112, preferably, a first reinforcing bar 113 is connected between the respective rotating arms 112, and a second reinforcing bar 114 is connected between each rotating arm 112 and the impeller shaft 111. Using the principle of triangle stability, the structural strength of the connection between the respective rotating arms 112 in the horizontal direction is strengthened by the first reinforcing bar 113, and the structural strength of the connection between the rotating arm 112 and the impeller shaft 111 in the vertical direction is strengthened by the second reinforcing bar 114, ensuring the overall stability. Both the first reinforcing bar 113 and the second reinforcing bar 114 can be arranged in a strip shape to strengthen the connection strength between the rotating arm 112 and the impeller shaft 111.
[0044] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims
1. A wind turbine with a function of adaptively changing the angle of blades, characterized in that Comprising: A frame on which a generator module is installed; An impeller module, including a frame body and a plurality of blades. The frame body is rotatably connected to the generator module. A plurality of rotating shafts are installed on the frame body, and the plurality of blades are rotatably connected to the plurality of rotating shafts one by one. The blades have a first stress surface and a second stress surface. A stop block is arranged on the frame body, and the stop block can block one side of the blade; Along the wind direction, with the symmetry line of the frame as the demarcation line; When the blade is on the first side of the demarcation line, the first stress surface faces the wind direction, and the blade is pressed against the stop block by the wind force; when the blade is near the top of the demarcation line, the stress surface of the blade switches from the first stress surface to the second stress surface, and the blade is flipped around the rotating shaft by the wind force, and the blade is parallel to the wind direction; when the blade is on the second side of the demarcation line, the blade is parallel to the wind direction; when the blade is near the bottom of the demarcation line, the first stress surface faces the wind direction, and the blade is pressed against the stop block by the wind force.
2. The wind turbine with the function of adaptively changing the angle of blades according to claim 1, wherein The blade is divided into a first sub-blade and a second sub-blade with the axis of the rotating shaft as the dividing line, and the width of the first sub-blade is greater than the width of the second sub-blade.
3. The wind turbine with the function of adaptively changing the angle of the blade according to claim 2, characterized in that, The stop block is telescopically arranged on the frame body, so that the stop block has a blocking state and a release state. In the blocking state, the blade is pressed on the stop block; when the pressure of the stop block by the blade is too large, the stop block changes from the blocking state to the release state; in the release state, the blade is released by the stop block to a free state.
4. The wind turbine with the function of adaptively changing the blade angle as described in claim 3, characterized in that In the blocking state, the distance between the stop block and the rotating shaft is less than the width of the first sub-blade, and the distance between the stop block and the rotating shaft is greater than the width of the second sub-blade; in the release state, the distance between the stop block and the rotating shaft is greater than the width of the first sub-blade, and the distance between the stop block and the rotating shaft is greater than the width of the second sub-blade.
5. The wind turbine with the function of self-adaptive blade angle variation as claimed in claim 4, wherein, A fixing block is further arranged on the frame body. A receiving groove is arranged in the fixing block, and a spring is arranged in the receiving groove. The spring is arranged between the stop block and the inner wall of the fixing block on the side away from the stop block.
6. The wind turbine with the function of self - adapting blade angle variation as claimed in claim 5, wherein, A guiding groove is arranged on the stop block, and a convex strip is arranged in the receiving groove of the fixing block. The stop block can slide in the receiving groove by the matching of the convex strip and the guiding groove.
7. The wind turbine with the function of adaptively changing the blade angle according to any one of claims 2 to 6, characterized in that, The shape of the blade is a rectangular plate.
8. The wind turbine with the function of adaptively changing the angle of the blade according to claim 7, characterized in that, The first sub-blade is 1 / 3 of the blade, and the second sub-blade is 2 / 3 of the blade.
9. The wind turbine with the function of adaptively changing the angle of blades according to claim 8, characterized in that, The number of the blades is 3 or 4.
10. The wind turbine with the function of adaptively changing the blade angle as described in claim 9, characterized in that, The frame body includes an impeller shaft and a plurality of rotating arms fixedly connected to the side wall of the impeller shaft. The impeller shaft is rotatably connected to the generator module. The plurality of rotating arms are arranged at equal intervals along the circumferential direction of the impeller shaft, and each rotating arm is provided with the rotating shaft.