Vertical axis wind turbine with self-adaptive deformation blades and control method

Abstract

The invention discloses a vertical axis wind turbine with self-adaptive deformation blades and a control method. The vertical axis wind turbine comprises a main shaft and a rotating sleeve arranged on the main shaft. The folding and unfolding piece comprises a fixed blade, a folding blade, a containing cavity formed in the fixed blade and a rotating shaft arranged at one end of the folding blade, and the rotating shaft is embedded in the containing cavity; the driving parts are arranged in the rotating sleeve, and the number of the driving parts is matched with that of the stretching parts; wherein the folding blades can rotate along the rotating shaft to be placed into the containing cavity or unfolded, when the fixed blades and the folding blades are folded, the vertical-axis wind driven generator is used as a lift force type wind driven generator, and when the fixed blades and the folding blades are unfolded, the vertical-axis wind driven generator is used as a lift force type wind driven generator. After being matched with the controller and the anemograph, the vertical-axis wind turbine can be automatically switched into a lift type and a resistance type according to the wind speed, and efficiency maximization can be achieved without manual intervention.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of generators, in particular to a vertical axis wind turbine with self-adapting deformed blades and a control method. BACKGROUND

[0002] The blades of the vertical axis wind turbine are subjected to much less force than the blades of the horizontal axis wind turbine during rotation, have a long service life, and are easy to install and maintain. The existing vertical axis wind turbine has lift-type wind turbines and drag-type wind turbines according to the working principle of the blades. The drag-type wind turbine is suitable for low wind speeds of less than 5 meters per second and super-high wind speeds of more than 25 meters per second, but has low efficiency in the wind speed interval of 5-25 meters per second. The lift-type wind turbine is suitable for wind speeds of 5-25 meters per second, but has lower efficiency than the drag-type wind turbine in wind speed intervals below 5 meters per second and above 25 meters per second. The existing vertical axis wind turbine is fixed in shape and cannot be switched between the lift-type wind turbine and the drag-type wind turbine, which makes it impossible to switch the shape according to the wind speed. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is that the existing vertical axis wind turbine is fixed in shape and cannot be switched between the lift-type wind turbine and the drag-type wind turbine.

[0004] The above technical problem is solved by the following technical solution. The present application provides a vertical axis wind turbine with self-adapting deformed blades, which includes a main shaft, a rotating sleeve arranged on the main shaft, a folding and unfolding member including a fixed blade and a folding blade, a receiving cavity arranged in the fixed blade, a rotating shaft arranged at one end of the folding blade, the rotating shaft being embedded in the receiving cavity, a driving member arranged in the rotating sleeve, and the number of the driving member matching the number of the folding and unfolding member. The folding blade can be rotated along the rotating shaft to be placed in the receiving cavity or unfolded. When the fixed blade and the folding blade are folded, the vertical axis wind turbine is used as a lift-type wind turbine. When the fixed blade and the folding blade are unfolded, the vertical axis wind turbine is used as a drag-type wind turbine.

[0005] In a preferred embodiment of the vertical axis wind turbine with self-adapting deformed blades, the folding and unfolding member includes a first outer surface and a first inner surface arranged on the fixed blade, a second outer surface and a second inner surface arranged on the folding blade, and a telescopic electric push rod arranged in the folding blade. The output end of the telescopic electric push rod is provided with a spring sheet that is attached to the inner wall of the second outer surface.

[0006] In a preferred embodiment of the vertical axis wind turbine with self-adapting deformed blades, the first inner surface and the second inner surface are both concave arc-shaped.

[0007] In a preferred embodiment of the vertical axis wind turbine with adaptive deforming blades according to the present application, the first outer surface is convexly curved.

[0008] In a preferred embodiment of the vertical axis wind turbine with adaptive deforming blades according to the present application, when the foldable blades are folded, the telescopic electric push rod is retracted, the second outer surface is flat, the convexly curved first outer surface and the flat second outer surface are respectively on the upper and lower sides of the foldable blades, and the pressure difference is formed by the wind with a greater speed passing through the first outer surface than the second outer surface.

[0009] In a preferred embodiment of the vertical axis wind turbine with adaptive deforming blades according to the present application, when the foldable blades are unfolded, the telescopic electric push rod is extended, the second outer surface is convexly curved, and the first outer surface and the second outer surface combine to form a convex surface, the first inner surface and the second inner surface combine to form a concave surface, the wind is divided by the convex surface and collected by the concave surface, so that the pressure of the convex surface is less than that of the concave surface.

[0010] In a preferred embodiment of the vertical axis wind turbine with adaptive deforming blades according to the present application, the driving member comprises a motor arranged at the top of the rotating sleeve, a driving bevel gear is arranged on the output shaft of the motor, and a driven bevel gear is arranged on the upper side of the driving bevel gear; a transmission box is arranged outside the rotating sleeve, and a transmission shaft is arranged in the transmission box.

[0011] The transmission shaft is fixedly connected with the driven bevel gear at the beginning end of the transmission box.

[0012] In a preferred embodiment of the vertical axis wind turbine with adaptive deforming blades according to the present application, a worm and a turbine that are engaged with each other are arranged at the end of the transmission box, the other end of the transmission shaft is connected with the worm, and the turbine is connected with a rotating shaft arranged vertically.

[0013] In a preferred embodiment of the vertical axis wind turbine with adaptive deforming blades according to the present application, a support beam fixedly connected with the fixed blades is arranged outside the transmission box.

[0014] In a preferred embodiment of the control method of the vertical axis wind turbine with adaptive deforming blades according to the present application, when the anemometer detects that the wind speed is in an interval other than 5-25 m / s, the controller automatically controls the motor to drive the foldable blades and the fixed blades to unfold, and simultaneously drives the telescopic electric push rod to extend, when the foldable blades and the fixed blades unfold to a preset angle, the telescopic electric push rod extends to a preset distance, and the second outer surface and the first outer surface combine to form a smoothly transitioned convex surface, the controller controls the telescopic electric push rod and the motor to stop, and at this time, the vertical axis wind turbine operates as a resistance type wind turbine.

[0015] When the anemometer detects that the wind speed is in the range of 5-25 m / s, the controller receives the wind speed signal and automatically controls the motor to fold the folding blades and the fixed blades, and simultaneously drives the telescopic electric push rod to retract; when the folding blades rotate to a preset angle and the fixed blades are completely folded, the telescopic electric push rod is retracted to a preset distance, and the second outer surface is flat, the controller controls the telescopic electric push rod and the motor to stop, at this time, the vertical axis wind turbine operates as a lift type wind turbine.

[0016] The beneficial effects of the present application are that the vertical axis wind turbine can be switched between lift type and drag type according to the wind speed, so as to achieve the best power generation efficiency. After cooperating with the controller and the anemometer, the vertical axis wind turbine can automatically switch between lift type and drag type according to the wind speed, without manual intervention to maximize efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application. Among them:

[0018] Figure 1 Structure diagram of the vertical axis wind turbine in lift type state;

[0019] Figure 2 Structure diagram of the vertical axis wind turbine in lift type state;

[0020] Figure 3 Structure diagram of the vertical axis wind turbine in lift type state;

[0021] Figure 4 Structure diagram of the vertical axis wind turbine in lift type state; Figure 3 Enlarged diagram of A in FIG. 5;

[0022] Figure 5 Sectional view of the rotating shaft transmission mechanism;

[0023] Figure 6 Structure diagram of the turbine worm structure. DETAILED DESCRIPTION

[0024] In order to make those skilled in the art better understand the present application, the present application will be further described in detail below in combination with specific embodiments and drawings.

[0025] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions regarding the present application, but the terms can be changed according to the intention of those of ordinary skill in the art, precedents, or new technology in the art. Also, specific terms can be selected by the applicant, and in this case, the detailed meanings thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the general description of the present application.

[0026] Referring to Figures 1-6 The embodiment provides a vertical axis wind turbine with adaptive deformed blades, comprising a main shaft 1, a rotating sleeve 11 arranged on the main shaft 1, a folding and unfolding part 2 comprising a fixed blade 21 and a folding blade 22, a receiving cavity 23 arranged in the fixed blade 21, a rotating shaft 24 arranged at one end of the folding blade 22, and the rotating shaft 24 being embedded in the receiving cavity 23, a driving part 3 arranged in the rotating sleeve 11, and the number of the driving part 3 matching the number of the folding and unfolding part 2, wherein the folding blade 22 can be rotated along the rotating shaft 24 to be placed in the receiving cavity 23 or unfolded, and when the fixed blade 21 and the folding blade 22 are folded, the vertical axis wind turbine is used as a lift-type wind turbine, and when the fixed blade 21 and the folding blade 22 are unfolded, the vertical axis wind turbine is used as a drag-type wind turbine.

[0027] The stator part of the generator is installed inside the main shaft 1, and the rotor part of the generator is installed inside the rotating sleeve 11. In this way, under the action of wind, the folding and unfolding part 2 drives the rotating sleeve 11 to rotate along the main shaft 1, thereby realizing power generation.

[0028] Further, the folding and unfolding part 2 comprises the fixed blade 21 and the folding blade 22. The fixed blade 21 is internally provided with the receiving cavity 23, and the folding blade 22 is connected to the fixed blade 21 through the fixedly connected rotating shaft 24, so that the folding blade 22 can rotate along the rotating shaft 24 to realize the action of being placed in the receiving cavity 23, i.e., the folding state or unfolding. When the fixed blade 21 and the folding blade 22 are in the folding state, the vertical axis wind turbine operates as a lift-type wind turbine; when the two are unfolded, the vertical axis wind turbine operates as a drag-type wind turbine.

[0029] The fixed blade 21 has a first outer surface 25 and a first inner surface 26, wherein the first outer surface 25 is convexly curved and the first inner surface 26 is concavely curved. The folding blade 22 has a second outer surface 27 and a second inner surface 28, wherein the second inner surface 28 is also concavely curved. The second outer surface 27 is made of a flexible film, and the folding blade 22 is internally provided with a telescopic electric push rod 29. A metal or plastic spring 210 is arranged on the output end of the telescopic electric push rod 29 and is in contact with the inner wall of the second outer surface 27. When the telescopic electric push rod 29 is retracted, the second outer surface 27 is flat. When the telescopic electric push rod 29 is extended, the spring 210 is pressed by the second outer surface 27 and is bent, and the second outer surface 27 is convexly curved under the support of the spring 210.

[0030] Lift mode: reference Figure 2 When the fixed blade 21 and the folding blade 22 are folded, the telescopic electric push rod 29 is retracted, and the second outer surface 27 is flat. In this case, the first outer surface 25 which is convexly curved and the second outer surface 27 which is flat are located on the upper and lower sides of the folding blade 22 respectively. According to the principle of fluid mechanics, the wind speed passing through the first outer surface 25 is greater than that passing through the second outer surface 27, thereby forming different pressure differences on the upper and lower sides of the folding blade 22. This pressure difference drives the folding blade 22 to rotate, thereby driving the rotating sleeve 11 and the rotor inside to rotate and cut the magnetic induction lines to generate electricity. At this time, the vertical axis wind turbine is used as a lift-type wind turbine.

[0031] Resistance mode: reference Figure 2 When the fixed blade 21 and the folding blade 22 are unfolded, the telescopic electric push rod 29 is extended, so that the second outer surface 27 is convexly curved. At this time, the second outer surface 27 and the first outer surface 25 form a complete convex surface, and the first inner surface 26 and the second inner surface 28 form a concave surface. When the wind passes through the convex surface, it will be divided into two parts; when the wind passes through the concave surface, it will be collected. According to the principle of pressure difference, the pressure on the convex surface is less than that on the concave surface, and under the action of this pressure difference, the folding blade 22 is driven to rotate to generate electricity. At this time, the vertical axis wind turbine operates as a resistance-type wind turbine.

[0032] Further, the top of the rotating sleeve 11 is provided with a motor 31, and the top of the output shaft of the motor 31 is connected with a driving bevel gear 32. The top of the driving bevel gear 32 is engaged with a plurality of driven bevel gears 33, and the number of the driven bevel gears 33 is same as the number of the foldable blades 22. The top of the rotating sleeve 11 is further provided with a plurality of transmission boxes 34, and the number of the transmission boxes 34 is also same as the number of the foldable blades 22. The transmission boxes 34 are provided with a worm 36 and a turbine 37 at the ends thereof, and the worm 36 and the turbine 37 are engaged with each other. The driven bevel gears 33 are connected with the worm 36 through a transmission shaft 35, and the turbine 37 is connected with the rotating shaft 24 on the foldable blade 22.

[0033] The outer side of the transmission box 34 is provided with a support beam 38, and the support beam 38 is fixedly connected with the fixed blade 21, so as to ensure that the fixed blade 21 is relatively stationary with the rotating sleeve 11, and the rotation of the rotating sleeve 11 does not directly affect the position of the fixed blade 21.

[0034] In use, the motor 31 is started to drive the driving bevel gear 32 to rotate, and the rotation of the driving bevel gear 32 is sequentially transmitted to the worm 36 through the driven bevel gears 33 and the transmission shaft 35, and the worm 36 drives the turbine 37 to rotate. Since the turbine 37 is connected with the rotating shaft 24 on the foldable blade 22, the rotating shaft 24 is driven to rotate forward or reversely relative to the fixed blade 21. Since the rotating shaft 24 is located on the foldable blade 22, the unfolding or folding actions of all the foldable blades 22 can be simultaneously driven by the motor 31, so as to meet the requirements of the blade state under different working modes.

[0035] In an embodiment of the present application, the whole vertical axis wind turbine can be used in cooperation with a controller and an anemometer, so as to realize an automatic unfolding or folding control method. The controller is used for controlling the motor 31 and the telescopic electric push rod 29, and the anemometer is signal connected with the controller. The specific method is as follows:

[0036] When the anemometer detects that the wind speed is in a wind speed interval outside 5-25 meters per second, the controller receives the wind speed signal, and automatically controls the motor 31 to drive the foldable blades 22 and the fixed blades 21 to unfold, and synchronously drives the telescopic electric push rod 29 to extend. When the foldable blades 22 and the fixed blades 21 unfold to a preset angle, and the telescopic electric push rod 29 extends to a preset distance, the second outer surface 27 is in a convex arc shape, and the second outer surface 27 and the first outer surface 25 are combined into a smooth transition convex surface. At this time, the controller controls the telescopic electric push rod 29 to stop extending, and controls the motor 31 to stop, and the vertical axis wind turbine is used as a resistance type wind turbine.

[0037] When the anemometer detects that the wind speed is in the wind speed interval of 5-25 meters per second, the controller receives the wind speed signal, automatically controls the motor 31 to drive the folding blades 22 to fold with the fixed blades 21, and synchronously drives the telescopic electric push rod 29 to retract. When the folding blades 22 rotate to a preset angle to make them completely fold with the fixed blades 21, and the telescopic electric push rod 29 retracts to a preset distance to make the second outer surface 27 in a flat state, the controller controls the telescopic electric push rod 29 to stop retracting, and controls the motor 31 to stop, so that the vertical axis wind turbine is used as a lift-type wind turbine.

[0038] Finally, it should be noted that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present application.

Claims

1. A vertical axis wind turbine with adaptive deformable blades, characterized in that: include, Main shaft (1), rotating sleeve (11) disposed on the main shaft (1); The retractable component (2) includes a fixed blade (21) and a folding blade (22), a receiving cavity (23) disposed in the fixed blade (21), and a rotating shaft (24) disposed at one end of the folding blade (22), the rotating shaft (24) being embedded in the receiving cavity (23); A driving member (3) is disposed inside the rotating sleeve (11), and the number of the driving member (3) matches the number of the extension members; The folding blade (22) can be rotated along the pivot (24) to be placed into the receiving cavity (23) or unfolded. When the fixed blade (21) and the folding blade (22) are folded, the vertical axis wind turbine is used as a lift wind turbine. When the fixed blade (21) and the folding blade (22) are unfolded, the vertical axis wind turbine is used as a drag wind turbine.

2. The vertical axis wind turbine with adaptive deformable blades according to claim 1, characterized in that: The retractable component (2) includes a first outer surface (25) and a first inner surface (26) disposed on the fixed blade (21), a second outer surface (27) and a second inner surface (28) disposed on the folding blade (22), and a telescopic electric push rod (29) disposed inside the folding blade (22). The output end of the telescopic electric push rod (29) is provided with a spring piece (210) that fits against the inner wall of the second outer surface (27).

3. The vertical axis wind turbine with adaptive deformable blades according to claim 2, characterized in that: Both the first inner surface (26) and the second inner surface (28) are concave arc-shaped.

4. The vertical axis wind turbine with adaptive deformable blades according to claim 3, characterized in that: The first outer surface (25) has a convex arc shape.

5. The vertical axis wind turbine with adaptive deformable blades according to claim 4, characterized in that: When the folding blade (22) is folded, the telescopic electric push rod (29) retracts, the second outer surface (27) becomes flat, the convex arc-shaped first outer surface (25) and the flat second outer surface (27) are respectively located on the upper and lower sides of the foldable blade (22), and the wind speed through the first outer surface (25) is greater than that through the second outer surface (27) to form a pressure difference.

6. The vertical axis wind turbine with adaptive deformable blades according to claim 5, characterized in that: When the folding blade (22) unfolds, the telescopic electric push rod (29) extends, the second outer surface (27) is convex arc-shaped, and it is combined with the first outer surface (25) to form a convex surface. The first inner surface (26) and the second inner surface (28) are combined to form a concave surface. The wind is diverted through the convex surface and converged through the concave surface, so that the pressure on the convex surface is less than that on the concave surface.

7. The vertical axis wind turbine with adaptive deformable blades according to claim 6, characterized in that: The driving component (3) includes a motor (31) disposed on the top of the rotating sleeve (11), a driving bevel gear (32) disposed on the output shaft of the motor (31), and a driven bevel gear (33) disposed on the upper side of the driving bevel gear (32); a transmission box (34) is disposed outside the rotating sleeve (11), and a transmission shaft (35) is disposed inside the transmission box (34); The drive shaft (35) passes through the beginning of the transmission box (34) and is fixedly connected to the driven bevel gear (33).

8. The vertical axis wind turbine with adaptive deformable blades according to claim 7, characterized in that: The transmission box (34) is provided with a meshing worm (36) and turbine (37) at its end. The other end of the transmission shaft (35) is connected to the worm (36), and the turbine (37) is connected to the vertically arranged rotating shaft (24).

9. The vertical axis wind turbine with adaptive deformable blades according to claim 8, characterized in that: A support beam (38) is provided on the outside of the transmission box (34) and is fixedly connected to the fixed blade (21).

10. A control method for adaptive deformable blades, characterized in that: The vertical axis wind turbine includes the adaptive deformable blades as described in any one of claims 1 to 9; and the control method is as follows: When the anemometer detects that the wind speed is outside the range of 5 to 25 m / s, the controller receives the wind speed signal and automatically controls the motor (31) to drive the folding blade (22) and the fixed blade (21) to unfold, and at the same time drives the telescopic electric push rod (29) to extend. When the folding blade (22) and the fixed blade (21) unfold to a preset angle, the telescopic electric push rod (29) extends to a preset distance, and the second outer surface (27) and the first outer surface (25) combine to form a smoothly transitioned convex surface, the controller controls the telescopic electric push rod (29) and the motor (31) to stop moving. At this time, the vertical axis wind turbine operates as a drag-type wind turbine. When the anemometer detects that the wind speed is in the range of 5 to 25 m / s, the controller receives the wind speed signal and automatically controls the motor (31) to drive the folding blade (22) to fold with the fixed blade (21), and at the same time drives the telescopic electric push rod (29) to retract. When the folding blade (22) rotates to a preset angle until it is completely folded with the fixed blade (21), the telescopic electric push rod (29) retracts to a preset distance and the second outer surface (27) is in a flat state, the controller controls the telescopic electric push rod (29) and the motor (31) to stop moving. At this time, the vertical axis wind turbine operates as a lift wind turbine.

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