Electric variable pitch limiting protection device of wind driven generator

Abstract

The utility model discloses an electric variable pitch limit protection device of a wind driven generator, which comprises a first variable pitch structure, a second variable pitch structure, a mounting seat and a third variable pitch structure, the first variable pitch structure, the second variable pitch structure and the third variable pitch structure are arranged at triangular positions on the mounting seat, and the first variable pitch structure, the second variable pitch structure and the third variable pitch structure are identical in structure. The mounting seat is used for supporting and limiting the first variable-pitch structure, the second variable-pitch structure and the third variable-pitch structure; the first variable-pitch structure can conduct swing adjustment and change the positions of the blades, the stepping motor controls a turbine to rotate through a worm so that the blades can conduct swing adjustment, the rotating disc is connected with a hydraulic driven rod through a second butt joint hinge frame, the bottom of the hydraulic driven rod is hinged to a first butt joint hinge frame, and limiting protection is conducted. The utility model relates to an electric variable-pitch limiting protection device of a wind driven generator, which achieves the purpose of limiting protection through the arrangement of the structure.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, specifically to a wind turbine electric pitch limit protection device. Background Technology

[0002] As one of the core components of the control system of large wind turbine units, the pitch system plays a vital role in the safe, stable, and efficient operation of the unit. Stable pitch control has become one of the hot topics and challenges in the current research on control technology of large wind turbine units.

[0003] The pitch mechanism controls the position angle of the blades relative to the plane of rotation. Small wind turbines do not have a pitch mechanism and must rely on stall to adjust the speed at high speeds. Pitch control allows the wind turbine to obtain electrical energy at low wind speeds and to capture a fixed amount of wind energy when the wind speed is higher than the rated wind speed. There is more than one way to control the blade pitch angle; all methods require a mechanism to control the blade angle. The control algorithm continuously monitors the wind speed and generator output and adjusts the blade pitch angle. When the wind speed is higher than the rated wind speed, the blade pitch angle increases significantly to change the angle of attack and induce stall.

[0004] However, the current wind turbine electric pitch limit protection device has the following problems: traditional wind turbine electric pitch limit protection devices often cannot achieve efficient limit protection and are prone to passive reset under wind force, so improvements are needed. Utility Model Content

[0005] The purpose of this invention is to provide a wind turbine electric pitch limit protection device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine electric pitch limit protection device, including a first pitch structure, a second pitch structure, a mounting base, and a third pitch structure. The first pitch structure, the second pitch structure, and the third pitch structure are provided at a triangular position on the mounting base. The first pitch structure, the second pitch structure, and the third pitch structure have the same structure. The mounting base is used for supporting and limiting the first pitch structure, the second pitch structure, and the third pitch structure.

[0007] The first pitch structure can be adjusted to change the position of the blades. The stepper motor controls the turbine to rotate through the worm gear, so that the blades can be adjusted to swing. The rotating disk is connected to the hydraulic driven rod through the second docking hinge. The bottom of the hydraulic driven rod is hinged to the first docking hinge for limit protection.

[0008] Specifically, the first pitch structure includes a pitch structure, a first fixed plate, a second fixed plate, and a third fixed plate. The second fixed plate is fixedly connected to the rear end of the first fixed plate, and the third fixed plate is fixedly connected to the rear end of the second fixed plate. The pitch structure is fixedly connected to the second fixed plate.

[0009] Specifically, the pitch structure includes blades, a fixed sleeve, and a rotating disk. The fixed sleeve is rotatably connected to the center of the fixed sleeve, the rotating disk is fixedly connected to the side end of the blade, the rotating disk is fixedly connected to the side end of the rotating disk, the lower end of the rotating disk is meshed with a worm gear, and a stepper motor is installed at the rear end of the worm gear.

[0010] Specifically, a second docking hinge is fixedly connected to the top of the rotating disk, and a hydraulic driven rod is hinged to the side end of the second docking hinge. The lower end of the hydraulic driven rod is hinged to the first docking hinge.

[0011] Specifically, the fixed sleeve is fixed to the second fixed plate, and the first fixed plate, the second fixed plate, and the third fixed plate are fixedly connected to the mounting base.

[0012] Specifically, the first docking hinge is fixedly connected to the second fixed plate, and the stepper motor is fixed on the third fixed plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By installing the first, second, and third pitch structures, which are identical in structure and all mounted on the mounting base, the pitch structures can adjust the oscillation of their internal blades. The first, second, and third fixing plates are fixed to the mounting base, providing support and limiting for the pitch structures. A stepper motor drives the worm gear to rotate, which in turn drives the turbine. The turbine, through a rotating disk, drives the blades to rotate on the fixed sleeve, changing the blades' angle of attack. During the rotation of the rotating disk, the second docking hinge acts on the hydraulic driven rod, allowing for extension and retraction. Simultaneously, the lower end of the hydraulic driven rod is hinged to the first docking hinge, enabling angle adjustment and improving the stability of the rotating disk's operation. Furthermore, the rotation amplitude of the rotating disk is controlled within 150 degrees to prevent collision interference between the second docking hinge and the worm gear. Attached Figure Description

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

[0016] Figure 2 This is a perspective view of the first pitch structure of this utility model;

[0017] Figure 3 This is a perspective view of the pitch structure of this utility model.

[0018] In the diagram: 1-First pitch structure; 2-Second pitch structure; 3-Mounting base; 4-Third pitch structure; 5-Pitch structure; 6-First fixing plate; 7-Second fixing plate; 8-Third fixing plate; 9-Blade; 10-Fixing sleeve; 11-Rotating disk; 12-First docking hinge; 13-Hydraulic driven rod; 14-Turbine; 15-Worm gear; 16-Stepper motor; 17-Second docking hinge. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a wind turbine electric pitch limit protection device, including a first pitch structure 1, a second pitch structure 2, a mounting base 3 and a third pitch structure 4. The first pitch structure 1, the second pitch structure 2 and the third pitch structure 4 are provided at the upper triangular position of the mounting base 3. The first pitch structure 1, the second pitch structure 2 and the third pitch structure 4 have the same structure. The mounting base 3 is used for supporting and limiting the first pitch structure 1, the second pitch structure 2 and the third pitch structure 4.

[0021] The first pitch structure 1 is capable of oscillation adjustment, changing the position of the blades 9. A stepper motor 16 controls the turbine 14 to rotate via a worm gear 15, causing the blades 9 to oscillate. The rotating disk 11 is connected to a hydraulic driven rod 13 via a second docking hinge 17. The bottom of the hydraulic driven rod 13 is hinged to the first docking hinge 12 for limit protection. By installing the first pitch structure 1, the second pitch structure 2, and the third pitch structure 4, which are structurally identical and all mounted on the mounting base 3, the first pitch structure 1, the second pitch structure 2, and the third pitch structure 4 can perform oscillation adjustment of the internal blades 9. The first fixed plate 6, the second fixed plate 7, and the third fixed plate... The fixed plate 8 is fixed to the mounting base 3, which can support and limit the pitch structure 5. The stepper motor 16 can drive the worm gear 15 to rotate, so that the worm gear 15 drives the turbine 14 to rotate. The turbine 14 drives the blades 9 to rotate on the fixed sleeve 10 through the rotating disk 11, changing the windward angle of the blades 9. When the rotating disk 11 moves, it can act on the hydraulic driven rod 13 through the second docking hinge 17, so that the hydraulic driven rod 13 can extend and retract. At the same time, the lower end of the hydraulic driven rod 13 is hinged to the first docking hinge 12, which can be used to adjust the angle, thereby improving the running stability of the rotating disk 11. The rotation range of the rotating disk 11 is controlled within 150 degrees to prevent the second docking hinge 17 from colliding and interfering with the worm gear 15.

[0022] The first pitch structure 1 includes a pitch structure 5, a first fixed plate 6, a second fixed plate 7, and a third fixed plate 8. The second fixed plate 7 is fixedly connected to the rear end of the first fixed plate 6, and the third fixed plate 8 is fixedly connected to the rear end of the second fixed plate 7. The pitch structure 5 is fixedly connected to the second fixed plate 7.

[0023] The pitch structure 5 includes blades 9, a fixed sleeve 10, and a rotating disk 11. The fixed sleeve 10 is rotatably connected to the center of the blades 9, the rotating disk 11 is fixedly connected to the side end of the blades 9, the rotating disk 11 is fixedly connected to the side end of the rotating disk 11, the lower end of the rotating disk 14 is meshed with a worm gear 15, and a stepper motor 16 is installed at the rear end of the worm gear 15.

[0024] The top of the rotating disk 11 is fixedly connected to a second docking hinge 17. The side end of the second docking hinge 17 is hinged to a hydraulic driven rod 13, and the lower end of the hydraulic driven rod 13 is hinged to the first docking hinge 12.

[0025] The fixed sleeve 10 is fixed to the second fixed plate 7, and the first fixed plate 6, the second fixed plate 7, and the third fixed plate 8 are fixedly connected to the mounting base 3.

[0026] The first docking hinge 12 is fixedly connected to the second fixed plate 7, and the stepper motor 16 is fixed on the third fixed plate 8.

[0027] Working principle: When needed, the user connects the rear end of the mounting base 3 to the generator set via a shaft. The first pitch structure 1, the second pitch structure 2, and the third pitch structure 4 are installed. These three structures are identical and all mounted on the mounting base 3. The first pitch structure 1, the second pitch structure 2, and the third pitch structure 4 allow for the adjustment of the internal blades 9. The first fixing plate 6, the second fixing plate 7, and the third fixing plate 8 are fixed to the mounting base 3, providing support and limiting for the pitch structure 5. The stepper motor 16 drives the worm gear 15 to rotate, causing the worm gear 15 to drive the turbine 14 to rotate. The turbine 14, through the rotating disk 11, drives the blades 9 to rotate on the fixed sleeve 10. When the rotating disk 11 moves, the windward angle of the variable blade 9 can be adjusted by the action of the second docking hinge 17 on the hydraulic driven rod 13, allowing the hydraulic driven rod 13 to extend and retract. At the same time, the lower end of the hydraulic driven rod 13 is hinged to the first docking hinge 12, enabling angle adjustment. This improves the operational stability of the rotating disk 11, and the rotation amplitude of the rotating disk 11 is controlled within 150 degrees to prevent collision interference between the second docking hinge 17 and the worm gear 15. When blade 9 needs adjustment, the stepper motor 16 controls the rotation of the worm gear 15, which is active control. The hydraulic driven rod 13 is set up as a passive engagement to improve the motion stability of the rotating disk 11, support the blade 9, prevent the blade 9 from rotating back, and complete the work.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Wind turbine motor variable pitch limit protection device, characterized in that: The first variable pitch structure (1), the second variable pitch structure (2), the third variable pitch structure (4) are the same structure, and the mounting seat (3) is used for supporting and limiting the first variable pitch structure (1), the second variable pitch structure (2) and the third variable pitch structure (4). The first variable pitch structure (1) can be swing adjusted to change the position of the blade (9), and the step motor (16) controls the rotation of the turbine (14) through the worm (15), so that the blade (9) is swing adjusted, and the rotating disc (11) is connected with the hydraulic driven rod (13) through the second butt joint hinge (17), and the bottom of the hydraulic driven rod (13) is hingedly arranged with the first butt joint hinge (12) for limiting protection.

2. The wind turbine motor variable pitch limit protection device of claim 1, wherein: The first variable pitch structure (1) comprises a variable pitch structure (5), a first fixed plate (6), a second fixed plate (7) and a third fixed plate (8), the rear end of the first fixed plate (6) is fixedly connected with the second fixed plate (7), the rear end of the second fixed plate (7) is fixedly connected with the third fixed plate (8), and the variable pitch structure (5) is fixedly connected on the second fixed plate (7).

3. The wind turbine motor variable pitch limit protection device of claim 2, wherein: The variable pitch structure (5) comprises a blade (9), a fixed sleeve seat (10) and a rotating disc (11), the center of the fixed sleeve seat (10) is rotatably connected with the blade (9), the side end of the blade (9) is fixedly connected with the rotating disc (11), the side end of the rotating disc (11) is fixedly connected with the turbine (14), the lower end of the turbine (14) is meshingly connected with the worm (15), and the rear end of the worm (15) is provided with the step motor (16).

4. The wind turbine motor variable pitch limit protection device of claim 3, wherein: The top of the rotating disc (11) is fixedly connected with the second butt joint hinge (17), the side end of the second butt joint hinge (17) is hingedly provided with the hydraulic driven rod (13), and the lower end of the hydraulic driven rod (13) is hingedly arranged with the first butt joint hinge (12).

5. The wind turbine motor variable pitch limit protection device of claim 4, wherein: The fixed sleeve seat (10) is fixed with the second fixed plate (7), the first fixed plate (6), the second fixed plate (7) and the third fixed plate (8) are fixedly connected with the mounting seat (3).

6. The wind turbine motor variable pitch limit protection device of claim 5, wherein: The first butt joint hinge (12) is fixedly connected with the second fixed plate (7), and the step motor (16) is fixed on the third fixed plate (8).

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