A wind turbine blade angle adjustment mechanism

Abstract

This utility model provides a wind turbine blade angle adjustment mechanism, relating to the field of blade angle adjustment technology. It includes an inner mounting base and an outer blade mounting rod. The lower part of the inner mounting base is fixed to a central shaft, and the outer blade mounting rod is mounted on the inner mounting base. A central shaft sleeve is mounted outside the central shaft, and an outer rotating sleeve is mounted on the middle of the central shaft sleeve. An eccentric shaft is provided in the middle of the outer blade mounting rod, and a first gear is mounted on the lower part of the eccentric shaft. An upper sleeve plate is provided inside the inner mounting base, and the eccentric shaft is located in the left part of the inner movable cavity opened in the upper sleeve plate. A lower connecting column is provided at the lower part of the inner mounting base, and a lower connecting block is provided at the lower end of the lower connecting column. This utility model achieves the purpose of adjusting the blade angle by the blade mounting rod rotating appropriately through the rotation of the shaft by an internal motor, thereby driving the gear transmission rotation. This makes the angle adjustment safer, more stable, and more convenient and practical.

Description

Technical Field

[0001] This utility model relates to the field of blade angle adjustment technology, specifically to a wind turbine blade angle adjustment mechanism. Background Technology

[0002] Wind power generation is an electrical device that converts wind energy into mechanical energy, and mechanical energy into electrical energy. It uses wind power to drive the rotation of wind turbine blades, and then uses a speed increaser to increase the rotational speed, thereby driving a generator to generate electricity. Therefore, the blade angle and the wind strength both affect the wind turbine's rotational speed. The larger the blade angle, the greater the wind energy obtained, and the higher the generator's rotational speed; conversely, the smaller the blade angle, the lower the generator's rotational speed. Thus, when the wind strength changes, the generator's rotational speed will also change accordingly, leading to unstable operation. To achieve a relatively stable rotational speed, the blade angle needs to be adjusted. A smaller blade angle is needed when the wind is strong, and a larger blade angle is needed when the wind is weak, so that the blades are at the optimal angle to maximize the utilization of wind energy.

[0003] The description of a micro wind turbine blade angle adjustment device in the prior art (publication number CN221195265U) reiterates that "bearing 9 is installed in the axial bearing hole of fixed sleeve 1 and end cover 8, rotating sleeve 7 is installed in the radial hole of fixed sleeve 1, moving mechanism 3 is installed on lead screw 2 through the internal thread on lead screw nut 16, slider 6 is installed in the groove of moving mechanism 3, its inner hole is installed on the lower short shaft of eccentric shaft 5, the upper shaft of eccentric shaft 5 is installed in the center hole of rotating sleeve 7, and the blade can be installed at the top through elastic sleeve 4, and the screw..." The left and right ends of the screw 2 are respectively installed in the bearing 9 inner holes of the fixed sleeve 1 and the end cover 8. The end cover 8 is fixed to the fixed sleeve 1 by screw A10. In this way, rotating the screw 2 can drive the moving mechanism 3 to move left and right through the screw nut 16. At the same time, the slider 6 in the groove of the moving mechanism 3 moves left and right with the moving mechanism 3 and drives the eccentric shaft 5 to rotate around the central axis of the rotating sleeve 7. However, in the prior art, when adjusting the angle, the slider in the groove of the moving mechanism may move when the blade is driven by the wind, which will affect the angle adjustment and is not safe, stable and reliable. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a wind turbine blade angle adjustment mechanism is provided to solve the problem that in existing technologies, the slider in the groove of the moving mechanism may move when the blade is driven by the wind, which will affect the angle adjustment and is not safe, stable and reliable.

[0005] To achieve the above objectives, a wind turbine blade angle adjustment mechanism is provided, comprising an inner mounting base and an outer blade mounting rod. The lower part of the inner mounting base is fixed on a central shaft, and the outer blade mounting rod is mounted on the inner mounting base. A central shaft sleeve is mounted outside the central shaft, and an outer rotating sleeve is mounted on the middle part of the central shaft sleeve. An eccentric shaft is provided in the middle part of the outer blade mounting rod, and a first gear is mounted on the lower part of the eccentric shaft. An upper sleeve plate is provided inside the inner mounting base, and the eccentric shaft is located in the left part of the inner movable cavity opened in the upper sleeve plate.

[0006] Furthermore, the lower part of the inner mounting base is provided with a lower connecting post, and the lower end of the lower connecting post is provided with a lower connecting block, and the lower end of the lower connecting block is fixed on the central shaft, and the upper part of the inner mounting base is provided with an upper connecting post.

[0007] Furthermore, the central bushing is provided with three sets of external grooves, and the external grooves are provided with first ball bearings.

[0008] Furthermore, the upper part of the outer mounting rod of the blade is provided with an outer cover plate, and the outer ring surface of the outer cover plate is in contact with the rolling surface of the first ball.

[0009] Furthermore, the upper outer side of the upper connecting column is provided with an inner groove, and a second ball is provided in the inner groove, and the inner side of the outer cover plate is in contact with the rolling surface of the second ball.

[0010] Furthermore, the middle part of the eccentric shaft is rotatably connected to the sleeve hole provided in the upper sleeve plate, the upper end of the first rotating shaft is rotatably connected to the right side of the upper sleeve plate, and the lower part of the lower connecting shaft is rotatably connected to the lower connecting column.

[0011] Furthermore, a first motor is installed below the inner mounting base, and a first rotating shaft is installed on the first motor.

[0012] Furthermore, a second gear is installed in the middle of the first rotating shaft, and the second gear is located in the right part of the inner movable cavity, and the first gear and the second gear are engaged together.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, the lower connecting block at the lower end of the inner mounting base is fixed on the central shaft, so that when the outer mounting rod of the blade rotates around the center of the central shaft, it can drive the inner mounting base, the central shaft sleeve, the outer rotating sleeve and the central shaft to rotate together to achieve the purpose of wind power generation.

[0015] 2. In this utility model, the outer ring surface of the outer cover plate is in contact with the first ball, and the inner side surface of the outer cover plate is in contact with the second ball, so that the outer cover plate rotates smoothly, safely and stably between the outer groove and the upper connecting column.

[0016] 3. The present invention mainly uses a first motor to rotate a first shaft, which drives a second gear to move in a gear-driven connection with the first gear in the middle of the lower connecting shaft. This facilitates the appropriate rotation of the lower connecting shaft by a certain angle, thereby adjusting the angle of the entire blade outer mounting rod and the blades mounted on it. The adjustment is stable, convenient, safe, and practical. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the blade outer mounting rod installed in the inner mounting base according to an embodiment of the present utility model;

[0019] Figure 3 This is a rendering of the blade external mounting rod according to an embodiment of the present utility model;

[0020] Figure 4 This is a diagram illustrating the installation effect of the second gear in an embodiment of this utility model.

[0021] In the diagram: 1. Central shaft; 10. Central shaft sleeve; 11. Outer rotating sleeve; 12. Outer groove; 13. First ball bearing; 2. Inner mounting seat; 20. Lower connecting column; 21. Lower connecting block; 22. Upper connecting column; 23. Inner groove; 24. Second ball bearing; 25. Inner movable cavity; 26. Upper sleeve plate; 27. Sleeve hole; 3. Blade outer mounting rod; 30. Outer cover plate; 31. Eccentric shaft; 32. Lower connecting shaft; 33. First gear; 4. First motor; 40. First rotating shaft; 41. Second gear. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Specific details, such as particular system structures and technologies, are provided to facilitate a more thorough understanding of the embodiments of the present utility model. The described embodiments are some, but not all, of the embodiments disclosed herein. However, those skilled in the art should understand that the present utility model can also be implemented in other embodiments without these specific details. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the present utility model. Figure 2This is a schematic diagram of the blade outer mounting rod installed in the inner mounting base according to an embodiment of the present invention. Figure 3 The diagram shows the effect of the blade external mounting rod according to an embodiment of this utility model. Figure 4 This is a diagram illustrating the installation effect of the second gear in an embodiment of this utility model.

[0025] Reference Figures 1 to 4 As shown, this utility model provides a wind turbine blade angle adjustment mechanism, including an inner mounting base 2 and an outer blade mounting rod 3. The lower part of the inner mounting base 2 is fixed on the central shaft 1, and the outer blade mounting rod 3 is mounted on the inner mounting base 2. A central shaft sleeve 10 is mounted on the outside of the central shaft 1, and an outer rotating sleeve 11 is mounted on the middle part of the central shaft sleeve 10. An eccentric shaft 31 is provided in the middle of the outer blade mounting rod 3, and a first gear 33 is mounted on the lower part of the eccentric shaft 31. An upper sleeve plate 26 is opened in the inner mounting base 2, and the eccentric shaft 31 is located in the left part of the inner movable cavity 25 opened in the upper sleeve plate 26.

[0026] In this embodiment, the lower part of the inner mounting base 2 is provided with a lower connecting post 20, and the lower end of the lower connecting post 20 is provided with a lower connecting block 21. The lower end of the lower connecting block 21 is fixed on the central shaft 1, and the upper part of the inner mounting base 2 is provided with an upper connecting post 22.

[0027] In a preferred embodiment, the lower connecting block 21 at the lower end of the inner mounting base 2 is fixed on the central shaft 1, so that when the outer mounting rod 3 of the blade rotates around the center of the central shaft 1, it can drive the inner mounting base 2, the central shaft sleeve 10, the outer rotating sleeve 11 and the central shaft 1 to rotate together to achieve the purpose of wind power generation.

[0028] In this embodiment, the upper outer side of the upper connecting column 22 is provided with an inner groove 23, and a second ball 24 is provided in the inner groove 23. The inner side of the outer cover plate 30 is in contact with the rolling surface of the second ball 24. The central bushing 10 is provided with three sets of outer grooves 12, and a first ball 13 is provided in the outer groove 12. The upper part of the blade outer mounting rod 3 is provided with an outer cover plate 30, and the outer ring surface of the outer cover plate 30 is in contact with the rolling surface of the first ball 13.

[0029] In a preferred embodiment, the outer ring surface of the outer cover plate 30 is in contact with the first ball 13, and the inner side surface of the outer cover plate 30 is in contact with the second ball 24, so that the outer cover plate 30 rotates smoothly, safely and stably between the outer groove 12 and the upper connecting post 22.

[0030] In this embodiment, the middle part of the eccentric shaft 31 is rotatably connected to the sleeve hole 27 provided in the upper sleeve plate 26, and the upper end of the first rotating shaft 40 is rotatably connected to the right side of the upper sleeve plate 26, and the lower part of the lower connecting shaft 32 is rotatably connected to the lower connecting column 20; a first motor 4 is installed below the inner mounting base 2, and a first rotating shaft 40 is installed on the first motor 4; a second gear 41 is installed in the middle of the first rotating shaft 40, and the second gear 41 is located in the right side of the inner movable cavity 25, and the first gear 33 and the second gear 41 are engaged together.

[0031] As a preferred embodiment, this utility model mainly uses the first motor 4 to rotate the first shaft 40, which drives the second gear 41 to move in a gear-driven connection with the first gear 33 in the middle of the lower connecting shaft 32. This facilitates the appropriate rotation of the lower connecting shaft 32 by a certain angle, thereby adjusting the angle of the entire blade outer mounting rod 3 and the blades mounted on it. The adjustment is stable, convenient, safe, and practical.

[0032] This invention effectively solves the problem in existing technologies where the slider in the groove of the moving mechanism may move when the blade is driven by wind during angle adjustment, thus affecting the angle adjustment and making it unsafe, unstable, and unreliable. This invention uses an internal motor to rotate the shaft independently, thereby driving the gear transmission to rotate, thus achieving the purpose of adjusting the blade angle by the blade mounting rod rotating appropriately. The angle adjustment is safer, more stable, and more convenient and practical.

[0033] The above embodiments are used to explain and illustrate the present utility model, and not to limit the utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims should be included within the protection scope of the present utility model.

Claims

1. A wind generator blade angle adjustment mechanism, characterized by: The device includes an inner mounting base (2) and an outer blade mounting rod (3). The lower part of the inner mounting base (2) is fixed on the central shaft (1), and the outer blade mounting rod (3) is mounted on the inner mounting base (2). A central shaft sleeve (10) is mounted on the outside of the central shaft (1), and an outer rotating sleeve (11) is mounted on the middle part of the central shaft sleeve (10). An eccentric shaft (31) is provided in the middle part of the outer blade mounting rod (3), and a first gear (33) is mounted on the lower part of the eccentric shaft (31). An upper sleeve plate (26) is opened in the inner mounting base (2), and the eccentric shaft (31) is located in the left part of the inner movable cavity (25) opened in the upper sleeve plate (26).

2. A wind turbine blade pitch adjustment mechanism according to claim 1, characterised in that, The lower part of the inner mounting base (2) is provided with a lower connecting post (20), and the lower end of the lower connecting post (20) is provided with a lower connecting block (21), and the lower end of the lower connecting block (21) is fixed on the central shaft (1), and the upper part of the inner mounting base (2) is provided with an upper connecting post (22).

3. A wind turbine blade pitch adjustment mechanism according to claim 1, wherein, The central bushing (10) is provided with three sets of external grooves (12), and the external grooves (12) are provided with first ball bearings (13).

4. A wind turbine blade pitch mechanism according to claim 1, wherein, The upper part of the blade outer mounting rod (3) is provided with an outer cover plate (30), and the outer ring surface of the outer cover plate (30) is in contact with the rolling surface of the first ball (13).

5. A wind turbine blade pitch adjustment mechanism according to claim 2, wherein, The upper outer side of the upper connecting column (22) is provided with an inner groove (23), and a second ball (24) is provided in the inner groove (23). The inner side of the outer cover plate (30) is in contact with the rolling surface of the second ball (24).

6. A wind turbine blade pitch adjustment mechanism according to claim 1, wherein, The middle part of the eccentric shaft (31) is rotatably connected to the sleeve hole (27) provided in the upper sleeve plate (26), and the upper end of the first rotating shaft (40) is rotatably connected to the right side of the upper sleeve plate (26), and the lower part of the lower connecting shaft (32) is rotatably connected to the lower connecting column (20).

7. A wind turbine blade pitch adjustment mechanism according to claim 1, wherein, A first motor (4) is mounted below the inner mounting base (2), and a first rotating shaft (40) is mounted on the first motor (4).

8. A wind driven generator blade angle adjustment mechanism as claimed in claim 7, wherein, The first rotating shaft (40) has a second gear (41) installed in the middle, and the second gear (41) is located in the right part of the inner movable cavity (25), and the first gear (33) and the second gear (41) are engaged together.

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