Variable-attack-angle vertical axis wind turbine loaded with iris-like mechanism

Abstract

The invention discloses a variable-attack-angle vertical axis wind turbine loaded with an iris-like mechanism, and belongs to the technical field of wind power generation. A fixed connecting rod fixing opening is formed in the edge of an iris outer disc of the variable-attack-angle vertical axis wind turbine, and a fixing column is arranged at the fixed connecting rod fixing opening; the iris inner disc is arranged in the iris outer disc, an adjusting strip hole is formed in the iris inner disc, and a moving column is arranged in the adjusting strip hole; one end of the fixed connecting rod body is connected with the side part of the wind turbine blade, and the other end is connected with the fixed column; one end of the movable connecting rod body is connected with the side part of the wind turbine blade, and the other end is connected with the moving column; one end of the switching rod is connected with the end part of the fixed connecting rod body through a fixing column; the other end of the switching rod is connected with the end part of the movable connecting rod body through a moving column; one end of the rotating shaft passes through the center of the iris inner disc, and the other end is connected with a power generation rotor in the generator chassis. The wind energy utilization rate is effectively increased; potential safety hazards during operation are avoided, and stability and economical efficiency of the wind turbine are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a variable-attack-angle vertical-axis wind turbine equipped with an iris-like mechanism. Background Art

[0002] A vertical axis wind turbine is a device that can efficiently capture wind energy and generate electricity, especially showing good energy utilization efficiency under low wind speed conditions. At present, the blades of vertical axis wind turbines are generally divided into two types: lift type and drag type. Lift type vertical axis wind turbines have higher power generation and greater wind energy capture efficiency, but usually require a higher starting wind speed, and the load direction of the blades is uneven. Therefore, improving its power generation efficiency and stable operation often requires changing the angle of attack of the blades or assisting in starting.

[0003] In traditional technology, the angle of attack of vertical axis wind turbine blades is mainly changed by adjusting the angle of attack with a crank. However, this method does not significantly improve the starting wind speed of the wind turbine, and at the same time limits the flexibility of adjusting the blade angle of attack, resulting in insufficient wind energy capture effect. In addition, the related technology achieves adaptive adjustment of the angle of attack by assembling springs on the blades of the vertical axis wind turbine. Although this method can improve the flexibility of the blade angle of attack, it may reduce the stability of the blade when it is subjected to thrust. In contrast, the resistance-type vertical axis wind turbine can self-start at lower wind speeds and has a strong load-bearing capacity, but its upper speed limit is low, resulting in a low wind energy capture efficiency. Summary of the invention

[0004] To this end, the present invention provides a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism to solve the problems of low wind energy utilization efficiency and stability and poor adjustment flexibility existing in traditional technologies.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a variable angle of attack vertical axis wind turbine carrying an iris-like mechanism, comprising an iris outer disc, an iris inner disc, a wind turbine blade, a fixed connecting rod body, a moving connecting rod body, a transfer rod, a rotating shaft and a generator chassis; The edge of the iris outer disk is formed with a fixed connecting rod fixing port, and the fixed connecting rod fixing port is provided with a fixing column; the iris inner disk is arranged inside the iris outer disk, and the iris inner disk is formed with an adjustment strip hole, and a moving column is provided inside the adjustment strip hole; One end of the fixed link body is connected to the side of the wind turbine blade, and the other end of the fixed link body is connected to the fixed column; one end of the movable link body is connected to the side of the wind turbine blade, and the other end of the movable link body is connected to the moving column; One end of the transfer rod is connected to the end of the fixed connecting rod body through the fixed column; the other end of the transfer rod is connected to the end of the moving connecting rod body through the moving column; One end of the rotating shaft passes through the center of the iris inner disk, and the other end of the rotating shaft is connected to the generator rotor in the generator chassis.

[0006] As a preferred solution of a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, the edge of one of the iris outer disks is provided with three fixed connecting rod fixing ports, and one of the iris inner disks is formed with three adjustment strip holes; Each of the fixed connecting rod fixing holes has a fixed column inside; each of the adjusting strip holes has a moving column inside; Each of the fixed columns is connected to a fixed link body, and each of the moving columns is connected to a moving link body; One of the fixed link bodies and one of the movable link bodies are connected together as a set to a side portion of one of the wind turbine blades.

[0007] As a preferred solution for a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, the three adjustment strip holes are distributed in equal arcs inside the iris inner disk, and three groups of the fixed connecting rod bodies and the moving connecting rod bodies are connected to a total of three wind turbine blades.

[0008] As a preferred solution for a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, a first hinged portion is provided at the connection between the fixed link body and the wind turbine blade, and a second hinged portion is provided at the connection between the movable link body and the wind turbine blade; the first hinged portion is located on the outside of the second hinged portion.

[0009] As a preferred solution of a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, when the variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism generates electricity: The rotation of the wind turbine blade drives the fixed link body and the movable link body to rotate coaxially; the torque generated by the rotation of the fixed link body and the movable link body drives the iris inner disk to rotate; the rotation of the iris inner disk drives the rotation shaft to rotate, and the rotation of the rotation shaft drives the generator rotor in the generator chassis to generate electricity.

[0010] As a preferred solution of a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, when the variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism performs drag type and lift type adjustments: The iris outer disk is controlled to rotate independently to drive the fixed connecting rod fixing port to rotate coaxially, and the iris inner disk does not rotate synchronously with the iris outer disk. The transfer rod connected to the iris outer disk pushes the moving column body to translate in the adjustment strip hole of the iris inner disk, so as to change the type and attack angle of the wind turbine blade by changing the position of the moving connecting rod body.

[0011] As a preferred solution for a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, when the wind speed in the wind field where the vertical axis wind turbine is located is less than 5m / s, the angle of attack of the wind turbine blade is adjusted to 90 degrees to form a resistance-type blade; When the wind speed in the wind field where the vertical axis wind turbine is located is between 5m / s and 10m / s, the wind turbine blades are gradually changed from resistance type blades to lift type blades by adjusting the angle of attack.

[0012] As a preferred solution for a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, when the wind speed in the wind field where the vertical axis wind turbine is located is greater than 10m / s, the position of the moving column inside the adjusting strip hole is adjusted to change the angle of attack of the wind turbine blades; When the wind speed in the wind field where the vertical axis wind turbine is located is in the dangerous operating wind speed range of the wind turbine, the wind turbine blades are changed from lift type blades to drag type blades through angle of attack adjustment.

[0013] As a preferred solution for a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, the integrated control of the wind turbine blade type and angle of attack is performed by the incoming wind speed and direction in the wind field where the vertical axis wind turbine is located. The integrated control formula of the wind turbine blade type and angle of attack is: ; Where α is the angle of attack of the wind turbine blade (3); is the incoming wind speed of the wind farm; is the optimal blade attack angle in the inflow wind direction; It is the dangerous operating wind speed for vertical axis wind turbine.

[0014] As a preferred solution for a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, the design relationship between the wind turbine blades and aerodynamic performance parameters is: ; ; In the formula, is the lift coefficient; is the drag coefficient; for lift; for resistance; Indicates the air density; represents the chord length of the wind turbine blade (3).

[0015] The present invention has the following advantages: a fixed connecting rod fixing opening is formed on the edge of the iris outer disk, and a fixed column is provided at the fixed connecting rod fixing opening; the iris inner disk is arranged inside the iris outer disk, and an adjustment strip hole is formed on the iris inner disk, and a moving column is provided inside the adjustment strip hole; one end of the fixed connecting rod body is connected to the side of the wind turbine blade, and the other end of the fixed connecting rod body is connected to the fixed column; one end of the moving connecting rod body is connected to the side of the wind turbine blade, and the other end of the moving connecting rod body is connected to the moving column; one end of the adapter rod is connected to the end of the fixed connecting rod body through the fixed column; the other end of the adapter rod is connected to the end of the moving connecting rod body through the moving column; one end of the rotating shaft passes through the center of the iris inner disk, and the other end of the rotating shaft is connected to the power generation rotor in the generator chassis. The present invention utilizes an iris-like mechanism to change the blade type and angle of attack, making the vertical axis wind turbine easier to start and effectively improving the utilization rate of wind energy; when the incoming wind speed is too large, the blades can be changed to a resistance-type placement, reducing the operating speed of the wind turbine, avoiding safety hazards during operation, and improving the stability and economy of the wind turbine; improving the wind energy utilization efficiency of the vertical axis wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 It is a first-view stereoscopic schematic diagram of a variable-angle-of-attack vertical-axis wind turbine equipped with an iris-like mechanism provided in an embodiment of the present invention; Figure 2 A second-view stereoscopic schematic diagram of a variable-angle-of-attack vertical-axis wind turbine equipped with an iris-like mechanism provided in an embodiment of the present invention; Figure 3 A third-angle perspective schematic diagram of a variable-attack-angle vertical-axis wind turbine equipped with an iris-like mechanism provided in an embodiment of the present invention; Figure 4 A schematic diagram of a variable angle of attack vertical axis wind turbine blade configuration provided in an embodiment of the present invention and provided with an iris-like mechanism; Figure 5 It is a schematic diagram of adjusting the blade attack angle of a variable-attack-angle vertical-axis wind turbine equipped with an iris-like mechanism provided in an embodiment of the present invention.

[0018] In the figure, 1. iris outer disk; 2. iris inner disk; 3. wind turbine blade; 4. fixed link body; 5. moving link body; 6. adapter rod; 7. rotating shaft; 8. generator chassis; 9. fixed link fixing port; 10. fixing column; 11. adjusting strip hole; 12. moving column; 13. first hinge part; 14. second hinge part. DETAILED DESCRIPTION

[0019] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present invention provides a variable angle of attack vertical axis wind turbine with an iris-like mechanism, including an iris outer disc 1, an iris inner disc 2, a wind turbine blade 3, a fixed connecting rod body 4, a moving connecting rod body 5, a transfer rod 6, a rotating shaft 7 and a generator chassis 8; The edge of the iris outer disc 1 is formed with a fixed connecting rod fixing opening 9, and the fixed connecting rod fixing opening 9 is provided with a fixing column 10; the iris inner disc 2 is arranged inside the iris outer disc 1, and the iris inner disc 2 is formed with an adjustment bar hole 11, and a moving column 12 is provided inside the adjustment bar hole 11; Among them, one end of the fixed link body 4 is connected to the side of the wind turbine blade 3, and the other end of the fixed link body 4 is connected to the fixed column 10; one end of the movable link body 5 is connected to the side of the wind turbine blade 3, and the other end of the movable link body 5 is connected to the moving column 12; Among them, one end of the transfer rod 6 is connected to the end of the fixed connecting rod body 4 through the fixed column 10; the other end of the transfer rod 6 is connected to the end of the moving connecting rod body 5 through the moving column 12; one end of the rotating shaft 7 passes through the center of the iris inner disk 2, and the other end of the rotating shaft 7 is connected to the generator rotor in the generator chassis 8.

[0021] In this embodiment, three fixed link fixing ports 9 are provided on the edge of an iris outer disk 1, and three adjustment strip holes 11 are formed on an iris inner disk 2; a fixed column 10 is provided inside each fixed link fixing port 9; a moving column 12 is provided inside each adjustment strip hole 11; each fixed column 10 is connected to a fixed link body 4, and each moving column 12 is connected to a moving link body 5; a fixed link body 4 and a moving link body 5 are connected to the side of a wind turbine blade 3 as a group; three adjustment strip holes 11 are distributed in equal arcs inside the iris inner disk 2, and three groups of fixed link bodies 4 and moving link bodies 5 are connected to three wind turbine blades 3 in total.

[0022] See also Figure 4 The airfoil of the wind turbine blade 3 is an important feature of the vertical axis wind turbine. The structural parameters of the airfoil will affect the aerodynamic performance of the airfoil and the overall working performance of the wind turbine. Structurally, the airfoil section is a completely closed water drop shape. When the air flows through the upper and lower surfaces, a pressure difference will be generated from the lower airfoil to the upper airfoil due to the different flow rates, generating a torque at the connection of the wind turbine's rotating shaft 7. The wind turbine blade 3 of this embodiment uses a NASA SC (2) -0714 configuration asymmetric blade.

[0023] Among them, when describing the structural characteristics of the airfoil of the wind turbine blade 3, the following geometric parameters need to be paid attention to. The leading edge of the airfoil is the main part of the wind turbine blade 3 that bears wind pressure during operation. The trailing edge of the airfoil has an important influence on the aerodynamic performance of the airfoil. The chord length indicates the size of the airfoil along the chord line direction. This parameter directly affects the performance of the lift coefficient, drag coefficient and other performances in the blade design. The mid-arc line determines the curvature of the airfoil to a certain extent and is an important curve for describing the shape of the airfoil. In addition, the maximum distance between the upper wing surface and the lower wing surface is called the maximum thickness of the airfoil, which reflects the size of the airfoil in the thickness direction. These parameters jointly affect the structural strength and aerodynamic characteristics of the blade.

[0024] Among them, the design relationship between the wind turbine blade 3 and the aerodynamic performance parameters is: ; ; In the formula, is the lift coefficient; is the drag coefficient; for lift; for resistance; Indicates the air density; represents the chord length of the wind turbine blade (3).

[0025] Among them, the upper wing surface of the airfoil is quasi-convex, and the lower wing surface is quasi-concave. When the NASA SC(2)-0714 blade is used as a lift type, the wind energy capture efficiency is high and the overall power generation is large; when the blade is used as a drag type, the trailing edge is placed toward the rotating shaft 7, and its concave surface is conducive to the capture of wind energy by the drag type blade, which can effectively reduce the starting wind speed.

[0026] In this embodiment, the connection between the fixed link body 4 and the wind turbine blade 3 is provided with a first hinge 13, and the connection between the moving link body 5 and the wind turbine blade 3 is provided with a second hinge 14; the first hinge 13 is located outside the second hinge 14. When the variable angle of attack vertical axis wind turbine carrying the iris-like mechanism generates electricity: the rotation of the wind turbine blade 3 drives the fixed link body 4 and the moving link body 5 to rotate coaxially; the torque generated by the rotation of the fixed link body 4 and the moving link body 5 drives the iris inner disk 2 to rotate; the rotation of the iris inner disk 2 drives the rotation shaft 7 to rotate, and the rotation of the rotation shaft 7 drives the generator rotor in the generator chassis 8 to generate electricity. When a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism performs drag-type and lift-type adjustments: the iris outer disk 1 is controlled to rotate independently to drive the fixed connecting rod fixing port 9 to rotate coaxially, the iris inner disk 2 does not rotate synchronously with the iris outer disk 1, and the adapter rod 6 connected to the iris outer disk 1 pushes the moving column 12 body to translate in the adjustment strip hole 11 of the iris inner disk 2, so as to change the type and angle of attack of the wind turbine blade 3 by changing the position of the moving connecting rod body 5.

[0027] Specifically, when wind / airflow blows through the asymmetric wind turbine blades 3, due to the different shapes and relative positions of the wind turbine blades 3, the wind / airflow will generate different pressures on the wind turbine blades 3. When the wind / airflow flows through the convex surface, a higher wind pressure is generated, and when the wind flows through the concave surface, a lower wind pressure is generated. The power applied by the wind to the wind turbine blades 3 is thereby used to drive the fixed connecting rod body 4 and the movable connecting rod body 5 to rotate coaxially. The rotating torque drives the iris inner disk 2 to rotate, and the rotating shaft 7 and the generator rotor in the generator chassis 8 are fixed. When the iris inner disk 2 rotates, the rotating shaft 7 can be connected to the gear to drive the generator rotor to generate electricity. At this time, there is no relative movement between the iris outer disk 1 and the iris inner disk 2.

[0028] When the type and angle of attack of the asymmetric wind turbine blade 3 need to be adjusted, the iris outer disk 1 rotates alone to drive the fixed connecting rod fixing port 9 to rotate coaxially. At this time, the iris inner disk 2 does not rotate synchronously with the iris outer disk 1. The adapter rod 6 connected to the iris outer disk 1 pushes the moving column 12 to translate in the adjustment strip hole 11 of the iris inner disk 2, thereby changing the position of the moving connecting rod body 5. Due to the cooperation of the first hinge part 13 and the second hinge part 14, the type and angle of attack of the asymmetric wind turbine blade 3 are changed.

[0029] See also Figure 5In this embodiment, the wind turbine blade 3 type and angle of attack are integratedly controlled by the incoming wind speed and direction in the wind field where the vertical axis wind turbine is located. The integrated control formula of the wind turbine blade 3 type and angle of attack is: ; Where α is the angle of attack of the wind turbine blade (3); is the incoming wind speed of the wind farm; is the optimal blade attack angle in the inflow wind direction; It is the dangerous operating wind speed for vertical axis wind turbine.

[0030] Specifically, when the wind speed in the wind field where the vertical axis wind turbine is located is less than 5m / s, the attack angle of the wind turbine blade 3 is adjusted to 90 degrees to form a resistance-type blade, which is conducive to the self-starting of the wind turbine at low wind speed; When the wind speed of the wind field where the vertical axis wind turbine is located is between 5m / s-10m / s, the wind turbine blade 3 is gradually changed from a resistance type to a lift type blade by adjusting the angle of attack, thereby improving the power generation efficiency of the wind turbine by increasing the maximum speed of the wind turbine rotor; When the wind speed in the wind field where the vertical axis wind turbine is located is greater than 10m / s, the position of the moving column 12 inside the adjusting strip hole 11 is adjusted to change the attack angle of the wind turbine blade 3, thereby increasing the wind energy utilization efficiency of the wind turbine blade 3; When the wind speed in the wind field where the vertical axis wind turbine is located is in the dangerous operating wind speed range of the wind turbine, the wind turbine blade 3 is changed from a lift type blade to a drag type blade through angle of attack adjustment, thereby reducing the speed of the wind turbine and the load intensity of the wind turbine rotor to ensure the safe operation of the wind turbine.

[0031] To sum up, the edge of the iris outer disk 1 of the present invention is formed with a fixed connecting rod fixing port 9, and the fixed connecting rod fixing port 9 is provided with a fixing column 10; the iris inner disk 2 is arranged inside the iris outer disk 1, and the iris inner disk 2 is formed with an adjustment strip hole 11, and a moving column 12 is provided inside the adjustment strip hole 11; one end of the fixed connecting rod body 4 is connected to the side of the wind turbine blade 3, and the other end of the fixed connecting rod body 4 is connected to the fixing column 10; one end of the moving connecting rod body 5 is connected to the side of the wind turbine blade 3, and the other end of the moving connecting rod body 5 is connected to the moving column 12; one end of the adapter rod 6 is connected to the end of the fixed connecting rod body 4 through the fixing column 10; the other end of the adapter rod 6 is connected to the end of the moving connecting rod body 5 through the moving column 12; one end of the rotating shaft 7 passes through the center of the iris inner disk 2, and the other end of the rotating shaft 7 is connected to the generator rotor in the generator chassis 8. When the variable angle of attack vertical axis wind turbine with iris-like mechanism is generating electricity: the rotation of wind turbine blade 3 drives the fixed link body 4 and the moving link body 5 to rotate coaxially; the torque of the rotation of the fixed link body 4 and the moving link body 5 drives the rotation of iris inner disk 2; the rotation of iris inner disk 2 drives the rotation shaft 7, and the rotation of the rotation shaft 7 drives the generator rotor in the generator chassis 8 to generate electricity. When the variable angle of attack vertical axis wind turbine with iris-like mechanism is performing resistance type and lift type adjustment: the iris outer disk 1 is controlled to rotate alone to drive the fixed link fixing port 9 to rotate coaxially, the iris inner disk 2 does not rotate synchronously with the iris outer disk 1, and the adapter rod 6 connected to the iris outer disk 1 pushes the body of the moving column 12 to translate in the adjustment bar hole 11 of the iris inner disk 2, so as to change the type and angle of attack of the wind turbine blade 3 by changing the position of the moving link body 5. The present invention utilizes an iris-like mechanism to change the blade type and angle of attack, making the vertical axis wind turbine easier to start and effectively improving the utilization rate of wind energy; when the incoming wind speed is too large, the blades can be changed to a resistance-type placement, reducing the operating speed of the wind turbine, avoiding safety hazards during operation, and improving the stability and economy of the wind turbine; improving the wind energy utilization efficiency of the vertical axis wind turbine.

[0032] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism, characterized in that: It comprises an iris outer disc (1), an iris inner disc (2), a wind turbine blade (3), a fixed connecting rod body (4), a movable connecting rod body (5), a transfer rod (6), a rotating shaft (7) and a generator chassis (8); The edge of the iris outer disk (1) is formed with a fixed connecting rod fixing opening (9), and the fixed connecting rod fixing opening (9) is provided with a fixing column (10); the iris inner disk (2) is arranged inside the iris outer disk (1), and the iris inner disk (2) is formed with an adjustment strip hole (11), and a moving column (12) is provided inside the adjustment strip hole (11); One end of the fixed link body (4) is connected to the side of the wind turbine blade (3), and the other end of the fixed link body (4) is connected to the fixed column (10); one end of the movable link body (5) is connected to the side of the wind turbine blade (3), and the other end of the movable link body (5) is connected to the moving column (12); One end of the transfer rod (6) is connected to the end of the fixed connecting rod body (4) via the fixed column (10); the other end of the transfer rod (6) is connected to the end of the moving connecting rod body (5) via the moving column (12); One end of the rotating shaft (7) passes through the center of the iris inner disk (2), and the other end of the rotating shaft (7) is connected to the generator rotor in the generator chassis (8).

2. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 1, characterized in that: The edge of one of the iris outer discs (1) is provided with three fixed connecting rod fixing openings (9), and one of the iris inner discs (2) is formed with three adjusting strip holes (11); A fixing column (10) is disposed inside each of the fixed link fixing openings (9); and a moving column (12) is disposed inside each of the adjusting bar holes (11); Each of the fixed columns (10) is connected to a fixed connecting rod body (4), and each of the moving columns (12) is connected to a moving connecting rod body (5); One of the fixed connecting rod bodies (4) and one of the movable connecting rod bodies (5) are connected together as a group to a side portion of one of the wind turbine blades (3).

3. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 2, characterized in that: The three adjusting strip holes (11) are distributed with equal arcs inside the iris inner disk (2), and the three groups of the fixed connecting rod bodies (4) and the moving connecting rod bodies (5) are connected to a total of three wind turbine blades (3).

4. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 2, characterized in that: A first hinged portion (13) is provided at the connection between the fixed link body (4) and the wind turbine blade (3), and a second hinged portion (14) is provided at the connection between the movable link body (5) and the wind turbine blade (3); the first hinged portion (13) is located outside the second hinged portion (14).

5. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 1, characterized in that: When a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism generates electricity: The rotation of the wind turbine blade (3) drives the fixed connecting rod body (4) and the movable connecting rod body (5) to rotate coaxially; the torque generated by the rotation of the fixed connecting rod body (4) and the movable connecting rod body (5) drives the iris inner disk (2) to rotate; the rotation of the iris inner disk (2) drives the rotation shaft (7) to rotate, and the rotation of the rotation shaft (7) drives the generator rotor in the generator chassis (8) to generate electricity.

6. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 1, characterized in that: When a variable angle of attack vertical axis wind turbine equipped with an iris-like mechanism is subjected to drag and lift type adjustments: The iris outer disk (1) is controlled to rotate independently to drive the fixed connecting rod fixing port (9) to rotate coaxially, and the iris inner disk (2) does not rotate synchronously with the iris outer disk (1). The transfer rod (6) connected to the iris outer disk (1) pushes the moving column (12) body to translate in the adjustment strip hole (11) of the iris inner disk (2), so as to change the type and attack angle of the wind turbine blade (3) by changing the position of the moving connecting rod body (5).

7. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 6, characterized in that: When the wind speed in the wind field where the vertical axis wind turbine is located is less than 5 m / s, the attack angle of the wind turbine blade (3) is adjusted to 90 degrees to form a resistance-type blade; When the wind speed in the wind field where the vertical axis wind turbine is located is between 5m / s and 10m / s, the wind turbine blades (3) are gradually changed from resistance type blades to lift type blades by adjusting the angle of attack.

8. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 7, characterized in that: When the wind speed in the wind field where the vertical axis wind turbine is located is greater than 10 m / s, the position of the moving column (12) inside the adjustment strip hole (11) is adjusted to change the angle of attack of the wind turbine blade (3); When the wind speed in the wind field where the vertical axis wind turbine is located is within the dangerous operating wind speed range of the wind turbine, the wind turbine blades (3) are changed from lift-type blades to drag-type blades by adjusting the angle of attack.

9. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 8, characterized in that: The type and angle of attack of the wind turbine blades (3) are integratedly controlled by the incoming wind speed and direction in the wind field where the vertical axis wind turbine is located. The integrated control formula for the type and angle of attack of the wind turbine blades (3) is: ； Where α is the angle of attack of the wind turbine blade (3); is the incoming wind speed of the wind farm; is the optimal blade attack angle in the inflow wind direction; It is the dangerous operating wind speed for vertical axis wind turbine.

10. A variable angle of attack vertical axis wind turbine with an iris-like mechanism according to claim 1, characterized in that: The design relationship between the wind turbine blade (3) and the aerodynamic performance parameters is: ； ； In the formula, is the lift coefficient; is the drag coefficient; for lift; for resistance; Indicates the air density; represents the chord length of the wind turbine blade (3).

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