Wind turbine blade with easy adjustment

Abstract

The utility model provides a kind of blade for wind power generation convenient to adjust, it is related to wind power generation field.The blade for wind power generation convenient to adjust, including blade and the main body for carrying blade, the inside of the main body is provided with the clamping portion that rotates along with main body, flange connection is passed between clamping portion and blade, the clamping portion is provided with crossbeam on the side away from blade, crossbeam is divided into high and low, the edge of high is provided with staggered gap, the inside of main body is fixedly installed with concentric annular expansion section, two annular expansion sections are synchronous and extend or retract, the annular expansion section of being set is operated to one side extrusion the other side contraction to crossbeam, so as to make clamping portion drive blade rotate, when wear occurs, it can be compensated error by adjusting the expansion amount of annular expansion section, so as to be able to drive blade to rotate while, realize conveniently wear compensation.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to a wind power generation blade that is easy to adjust. Background Technology

[0002] Pitch control enables wind turbines to generate electricity at low wind speeds and capture a fixed amount of wind energy when the wind speed exceeds the rated speed. There are multiple methods for controlling the blade pitch angle; all methods require a mechanism to control the blade angle. The control algorithm continuously monitors wind speed and generator output, adjusting the blade pitch angle accordingly. When the wind speed exceeds the rated speed, the blade pitch angle increases significantly to change the angle of attack and induce stall.

[0003] Existing patent CN217841891U describes a single-blade dual-pitch drive pitch system, comprising: a first pitch drive gearbox and a first pitch motor connected to the first pitch drive gearbox, each pitch bearing having a corresponding first pitch drive gearbox; wherein the drive gear of the first pitch drive gearbox meshes with the pitch bearing; a second pitch drive gearbox and a second pitch motor connected to the second pitch drive gearbox; wherein the drive gear of the second pitch drive gearbox meshes with the pitch bearing. This application solves the problems of existing technologies where the size and weight of a single pitch drive gearbox are too large, making it difficult to transport it from the hub when replacement is needed; and the design and production difficulties and high costs associated with the high power of a single pitch motor and inverter. Existing blade pitch drive units consist of gears and gear rings. After wear occurs, gaps exist between the gears and gear rings, making it impossible to control the blade pitch within these gaps and difficult to compensate for. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an easily adjustable wind turbine blade, solving the problems mentioned in the background technology of slow adjustment response speed of gear-ring controlled blades and the inability to easily compensate for wear.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an easily adjustable wind turbine blade, comprising a blade and a main body for supporting the blade. The main body has a locking part that rotates with the main body. The locking part and the blade are connected by a flange. The locking part has a crossbeam on the side away from the blade. The crossbeam is divided into a high part and a low part. The edge of the high part has a misalignment notch. Concentric annular telescopic parts are fixedly installed inside the main body. The two annular telescopic parts extend or retract synchronously. Each of the two annular telescopic parts has a control part for adjusting the extension and retraction of the free end of the annular telescopic part away from its free end. The free ends of the two annular telescopic parts respectively abut against the crossbeam. The ends of the two annular telescopic parts away from the locking part are located on the same plane. The two annular telescopic parts are flush with the center planes of the high part and the low part, respectively. The outer annular telescopic part is fitted inside the misalignment notch.

[0007] Furthermore, the inner ring of the main body is provided with a snap-fit ​​groove, the inner ring of the snap-fit ​​part is provided with a connecting plate, the outer ring of the connecting plate is provided with a protrusion that matches the snap-fit ​​groove, the middle of the connecting plate is provided with a through hole, the free end of the annular telescopic part is fixedly installed with a threaded shaft whose end face is flush with the inner bottom wall of the snap-fit ​​groove, the outer surface of the threaded shaft located away from the snap-fit ​​part is threaded with a nut, and the snap-fit ​​part is provided with a central shaft that passes through the connecting plate and is sleeved with the main body.

[0008] Furthermore, the protrusion is divided into a clockwise inclined portion and a counterclockwise inclined portion, both of which are distributed in a ring along the central axis of the connecting disc.

[0009] Furthermore, the inner ring of the main body is provided with a threaded groove, and the inner ring of the threaded groove is threadedly connected to a threaded ring. The threaded ring covers the snap-fit ​​part inside the main body, and the blade is sleeved on the inner ring of the threaded ring.

[0010] Furthermore, the snap-fit ​​part is provided with a semi-through threaded hole aligned with the flange connection hole, and a countersunk bolt is threaded inside the semi-through threaded hole.

[0011] Furthermore, the annular telescopic part is driven by pneumatic or hydraulic pressure, and the control part is a pipe that controls the flow of fluid.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This easily adjustable wind turbine blade uses a ring-shaped telescopic part to squeeze one side of the crossbeam and contract the other side, thereby enabling the locking part to drive the blade to rotate. When wear occurs, the error can be compensated by adjusting the extension and retraction of the ring-shaped telescopic part, thus achieving convenient wear compensation while driving the blade to rotate.

[0014] 2. The adjustable wind turbine blade has a semi-through threaded hole that aligns with the flange connection hole in the snap-fit ​​part. The semi-through threaded hole is internally threaded with a countersunk bolt. The back of the snap-fit ​​part has a moving part that requires lubrication. The semi-through threaded hole restricts the communication between the inside and outside of the snap-fit ​​part, preventing impurities from entering the back of the snap-fit ​​part. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the main body connection of this utility model;

[0017] Figure 3 This is a schematic diagram of the connecting disc of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection of the annular telescopic part of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection of the snap-fit ​​part of this utility model.

[0020] The components are as follows: 1. Blade; 2. Snap-fit ​​part; 3. Flange; 4. Crossbeam; 401. High part; 402. Low part; 403. Misalignment notch; 5. Annular telescopic part; 501. Control part; 502. Threaded shaft; 504. Central shaft; 503. Nut; 6. Snap-fit ​​groove; 7. Connecting disc; 701. Protrusion; 8. Through hole; 9. Threaded ring; 10. Semi-through threaded hole; 11. Countersunk bolt; 12. Main body; 13. Threaded groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] See Figures 1-5An easily adjustable wind turbine blade includes a blade 1 and a body 12 for supporting the blade 1. The body 12 has a locking part 2 that rotates with it. The locking part 2 and the blade 1 are connected by a flange 3. This part is part of the prior art. The prior art also includes an inspection unit for detecting the tilt angle of the blade 1, as well as other units for wind power generation. The locking part 2 has a crossbeam 4 on the side away from the blade 1. The crossbeam 4 is divided into a high part 401 and a low part 402. The edge of the high part 401 has a misalignment notch 403. Concentric annular telescopic parts 5 are fixedly installed inside the body 12. Since the blade 1 needs to rotate 90 degrees, the annular telescopic parts 5 should have a rotation angle greater than 180 degrees. Therefore, two annular telescopic parts 5 are misaligned, and a misalignment notch 403 is provided. Due to the misalignment, the two annular telescopic parts 5 extend or retract synchronously. Each of the two annular telescopic parts 5 is provided with a control part 501 for adjusting the extension and retraction of the free end of the annular telescopic part 5. The free ends of the two annular telescopic parts 5 respectively abut against the crossbeam 4. The ends of the two annular telescopic parts 5 respectively located away from the locking part 2 are on the same plane. The two annular telescopic parts 5 are flush with the center planes of the high part 401 and the low part 402 respectively. The outer annular telescopic part 5 is fitted inside the misalignment notch 403. The annular telescopic parts 5 perform a one-sided compression and one-sided contraction operation on the crossbeam 4, thereby enabling the locking part 2 to drive the blade 1 to rotate. When wear occurs, the error can be compensated by adjusting the extension and retraction of the annular telescopic parts 5, thereby enabling convenient wear compensation while driving the blade 1 to rotate.

[0023] The inner ring of the main body 12 has a snap-fit ​​groove 6, the inner ring of the snap-fit ​​part 2 has a connecting plate 7, the outer ring of the connecting plate 7 has a protrusion 701 that matches the snap-fit ​​groove 6, the middle of the connecting plate 7 has a through hole 8, the free end of the annular telescopic part 5 is fixedly installed with a threaded shaft 502 whose end face is flush with the inner bottom wall of the snap-fit ​​groove 6, the outer surface of the threaded shaft 502 located away from the snap-fit ​​part 2 is threaded with a nut 503, the snap-fit ​​part 2 is provided with a central shaft 504 that passes through the connecting plate 7 and is sleeved with the main body 12. By setting the connecting plate 7 and the main body 12 to be snapped separately, the snap-fit ​​part 2 and the annular telescopic part 5 can be installed easily. First, the threaded shaft 502 is sleeved in the through hole 8, then the nut 503 is installed, and finally the connecting plate 7 is snapped into the inside of the main body 12. Of course, the lubrication part and the bearing part are required for support.

[0024] The protrusion 701 is divided into a clockwise inclined part and a counterclockwise inclined part. The two parts are distributed in a ring along the central axis 504 of the connecting plate 7. This arrangement can change the snap-fit ​​shape and prevent the connecting plate 7 from rotating clockwise or counterclockwise relative to the main body 12.

[0025] The inner ring of the main body 12 has a threaded groove 13, and the inner ring of the threaded groove 13 is threadedly connected to a threaded ring 9. The threaded ring 9 covers the snap-fit ​​part 2 inside the main body 12. The blade 1 is sleeved on the inner ring of the threaded ring 9. After the snap-fit ​​part 2 is installed, the threaded ring 9 limits the snap-fit ​​part 2 and restricts the snap-fit ​​part 2 inside the main body 12. Of course, it is also possible to set a flange ring on the main body 12 to limit the snap-fit ​​part 2, but setting a protruding part for snap-fit ​​will affect the overall streamlined shape of the main body 12.

[0026] The snap-fit ​​part 2 is provided with a semi-through threaded hole 10 aligned with the connection hole of the flange 3. The semi-through threaded hole 10 is internally threaded with a countersunk bolt 11. The back of the snap-fit ​​part 2 has a moving part that requires lubrication. By providing the semi-through threaded hole 10, the internal and external communication of the snap-fit ​​part 2 can be restricted, preventing impurities from entering the back of the snap-fit ​​part 2.

[0027] The annular telescopic part 5 is driven by pneumatic or hydraulic pressure. It can also be used as an actuator by employing the principle of a jack. The control part 501 is a pipe for controlling the inflow and outflow of fluid. Similarly, other devices that can achieve annular telescopic control can replace the pneumatic or hydraulic drive. It is necessary to ensure that the device maintains a certain rigidity after the action is completed.

[0028] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An easily adjustable wind turbine blade, comprising a blade (1) and a body (12) for supporting the blade (1), characterized in that: The body (12) is provided with a snap-fit ​​part (2) that rotates together with the body (12), and the snap-fit ​​part (2) and the blade (1) are connected by a flange (3); The snap-fit ​​part (2) has a crossbeam (4) on the side away from the blade (1). The crossbeam (4) is divided into a high part (401) and a low part (402). The edge of the high part (401) is provided with a misalignment notch (403). The main body (12) is fixedly installed with concentric annular telescopic parts (5). The two annular telescopic parts (5) extend or retract synchronously. The two annular telescopic parts (5) are provided with control parts (501) for adjusting the extension and retraction of the free end of the annular telescopic parts (5) away from the free end. The free ends of the two annular telescopic parts (5) respectively abut against the crossbeam (4). The ends of the two annular telescopic parts (5) away from the snap-fit ​​part (2) are located on the same plane. The two annular telescopic parts (5) are respectively flush with the center plane of the high part (401) and the low part (402). The outer annular telescopic part (5) is fitted inside the misalignment notch (403).

2. The wind turbine blade (1) for easy adjustment according to claim 1, characterized in that: The inner ring of the main body (12) is provided with a snap-fit ​​groove (6), the inner ring of the snap-fit ​​part (2) is provided with a connecting plate (7), the outer ring of the connecting plate (7) is provided with a protrusion (701) that matches the snap-fit ​​groove (6), the middle part of the connecting plate (7) is provided with a through hole (8), the free end of the annular telescopic part (5) is fixedly installed with a threaded shaft (502) whose end face is flush with the inner bottom wall of the snap-fit ​​groove (6), the outer surface of the threaded shaft (502) located on the connecting plate (7) away from the snap-fit ​​part (2) is threaded with a nut (503), and the snap-fit ​​part (2) is provided with a central shaft (504) that passes through the connecting plate (7) and is sleeved with the main body (12).

3. The wind turbine blade for easy adjustment according to claim 2, characterized in that: The protrusion (701) is divided into a clockwise inclined part and a counterclockwise inclined part, and the two parts are distributed in a ring along the central axis (504) of the connecting disk (7).

4. A wind turbine blade that is easy to adjust according to any one of claims 1-3, characterized in that: The inner ring of the main body (12) has a threaded groove (13), and the inner ring of the threaded groove (13) is threadedly connected to a threaded ring (9). The threaded ring (9) covers the snap-fit ​​part (2) inside the main body (12), and the blade (1) is sleeved on the inner ring of the threaded ring (9).

5. The wind turbine blade for easy adjustment according to claim 4, characterized in that: The snap-fit ​​part (2) is provided with a semi-through threaded hole (10) aligned with the connection hole of the flange (3), and a countersunk bolt (11) is threaded inside the semi-through threaded hole (10).

6. The wind turbine blade for easy adjustment according to claim 5, characterized in that: The annular telescopic part (5) is driven by air pressure or hydraulic pressure, and the control part (501) is a pipe for controlling the flow of fluid.

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