Variable pitch device of wind generating set

Abstract

The utility model relates to a wind generating set variable pitch device which comprises a shell and an end socket, the end socket is fixedly connected to the shell, a support is arranged in the shell and fixedly connected to the inner wall of the shell, vertical plates are fixedly connected to the support at equal intervals, adjusting grooves are formed in the vertical plates, and a driving mechanism is arranged on the support. And the driving mechanism is used for driving the blades to perform angle rotation so as to realize a variable-pitch effect. The variable pitch device has the advantages that the lifting plate can be driven to move through the driving mechanism, the bent rod is driven to move through movement of the lifting plate, the bent rod is used for driving the connecting rod to move, then variable pitch operation is carried out on the blades, and compared with a traditional device, the variable pitch device has the advantages of being convenient to operate and simple in structure, and practicability is high. And the overall structure is stable and reliable, faults are not prone to occurring, and the service life can be long.

Description

Technical Field

[0001] The utility model relates to the technical field of pitch-changing devices, in particular to a pitch-changing device for a wind turbine generator set. Background Art

[0002] The pitch device of a wind turbine is one of its core components. Its main function is to adjust the blade angle to adapt to different wind speeds and directions, thereby optimizing power generation efficiency and protecting the generator. By precisely controlling the tilt angle of the blades, the pitch device can ensure that the wind turbine can operate efficiently and stably under various wind conditions. This adjustment capability is crucial to improving wind energy conversion efficiency and extending the service life of the equipment.

[0003] At present, many wind turbines use gear drive mechanisms to adjust the blade angles in their variable pitch systems. This mechanism is known for its simple design and reliable operation, and has become a widely used technical solution in the industry. The gear structure drives the blades to change their angles precisely through precise meshing to adapt to different wind conditions.

[0004] However, as time goes by, gear wear will gradually accumulate, which may lead to a decrease in the accuracy of blade angle adjustment. The occurrence of wear will affect the response sensitivity and accuracy of the pitch control system, which may in turn affect the overall performance and power generation efficiency of the wind turbine.

[0005] Based on this, those skilled in the art have proposed a wind turbine pitch control device. Utility Model Content

[0006] In view of the above problems existing in the prior art, the main purpose of the utility model is to provide a pitch control device for a wind turbine generator set.

[0007] The technical solution of the utility model is as follows: a wind turbine pitch device, comprising a shell and a head, the head is fixedly connected to the shell, a bracket is arranged inside the shell, the bracket is fixedly connected to the inner wall of the shell, vertical plates are fixedly connected to the bracket at equal intervals, the vertical plates are provided with adjustment slots inside, and a driving mechanism is arranged on the bracket;

[0008] The driving mechanism is used to drive the blades to rotate at an angle to achieve a variable pitch effect.

[0009] Through the above technical means, a hollow structure is provided inside the shell and the head, and the bracket is arranged inside the hollow structure. The bracket is a two-piece structure, and the vertical plate is used to provide stable support for the bracket.

[0010] As a preferred embodiment, the driving mechanism includes a screw rod, a lifting plate and a fixing plate;

[0011] The screw rod is rotatably connected to the inside of the bracket, the lifting plate is threadedly connected to the outside of the screw rod, and the fixed plates are equidistantly fixedly connected above the lifting plate. The number of the fixed plates is consistent with the number of the vertical plates.

[0012] Through the above technical means, the lifting plate can be driven to descend and ascend by the rotation of the screw rod, and the fixed plate can be driven to move by the movement of the lifting plate.

[0013] As a preferred embodiment, the driving mechanism further includes a connecting pin, a bent rod and a connecting rod;

[0014] The connecting pins are all rotatably connected to the fixed plate, the bent rods are all rotatably connected to the corresponding connecting pins, and the connecting rods are all rotatably connected to the corresponding bent rods.

[0015] Through the above technical means, the movement of the fixing plate drives the connecting pin to move together, and the connecting pin shaft can drive the bending rod to move when moving.

[0016] As a preferred embodiment, bearing seats are equidistantly connected to the top of the shell, blades are rotatably connected inside the bearing seats, and one end of the blades is fixedly connected to the corresponding connecting rod.

[0017] Through the above technical means, the bending rod can drive the connecting rod to move when it moves, and the connecting rod can drive the blade to change its angle when it moves.

[0018] As a preferred implementation, a driving motor is fixedly connected to the top of the bracket, and an output end of the driving motor is fixedly connected to the lead screw.

[0019] Through the above technical means, the driving motor can provide rotational power for the screw rod.

[0020] Compared with the prior art, the advantages and positive effects of the utility model are:

[0021] The utility model can drive the lifting plate to move through the driving mechanism, and the movement of the lifting plate drives the bending rod to move, and the bending rod drives the connecting rod to move, thereby realizing the pitch operation of the blades. Compared with traditional devices, the utility model has the characteristics of convenient operation and simple structure, and the overall structure is stable and reliable, not prone to failure, and can have a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an isometric view of the utility model;

[0023] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0024] Figure 3It is an isometric view of the overall structure of the driving mechanism of the utility model;

[0025] Figure 4 It is an isometric view of the drive mechanism of the utility model in a disassembled state.

[0026] Legend: 1. Casing; 2. Head; 3. Bracket; 4. Vertical plate; 5. Adjustment slot; 6. Screw; 7. Lifting plate; 8. Fixed plate; 9. Connecting pin; 10. Bending rod; 11. Connecting rod; 12. Bearing seat; 13. Blade; 14. Driving motor. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example

[0030] like Figure 1-Figure 4 As shown, the utility model provides a wind turbine pitch device: comprising a shell 1 and a head 2, the head 2 is fixedly connected to the shell 1, a bracket 3 is arranged inside the shell 1, the bracket 3 is fixedly connected to the inner wall of the shell 1, vertical plates 4 are equidistantly fixedly connected to the bracket 3, the vertical plates 4 are all provided with adjustment slots 5 inside, and a driving mechanism is arranged on the bracket 3;

[0031] The driving mechanism is used to drive the blades to rotate their angles to achieve a variable pitch effect;

[0032] In summary: a hollow structure is arranged inside the shell 1 and the head 2 , and the bracket 3 is arranged inside the hollow structure. The bracket 3 is a two-piece structure, and the vertical plate 4 is used to provide stable support for the bracket 3 .

[0033] like Figure 1-Figure 4 As shown, the driving mechanism includes a screw rod 6, a lifting plate 7 and a fixing plate 8;

[0034] The screw rod 6 is rotatably connected to the inside of the bracket 3, the lifting plate 7 is threadedly connected to the outside of the screw rod 6, and the fixed plates 8 are equidistantly fixedly connected above the lifting plate 7, and the number of the fixed plates 8 is the same as the number of the vertical plates 4;

[0035] In summary: the rotation of the screw rod 6 can drive the lifting plate 7 to descend and ascend, and the movement of the lifting plate 7 can drive the fixed plate 8 to move.

[0036] like Figure 1-Figure 4As shown, the driving mechanism further includes a connecting pin 9, a bent rod 10 and a connecting rod 11;

[0037] The connecting pins 9 are all rotatably connected to the fixed plate 8, the bent rods 10 are all rotatably connected to the corresponding connecting pins 9, and the connecting rods 11 are all rotatably connected to the corresponding bent rods 10;

[0038] In summary: the movement of the fixing plate 8 drives the connecting pin 9 to move together, and the connecting pin shaft 9 can drive the bending rod 10 to move when moving.

[0039] like Figure 1-Figure 4 As shown, the upper part of the housing 1 is equidistantly connected with a bearing seat 12, the interior of the bearing seat 12 is rotatably connected with a blade 13, and one end of the blade 13 is fixedly connected to the corresponding connecting rod 11;

[0040] In summary, the bending rod 10 can drive the connecting rod 11 to move when it moves, and the connecting rod 11 can drive the blade 13 to change its angle when it moves.

[0041] like Figure 1-Figure 4 As shown, a driving motor 14 is fixedly connected to the top of the bracket 3, and the output end of the driving motor 14 is fixedly connected to the screw rod 6;

[0042] In summary: the driving motor 14 can provide rotational power for the screw rod 6 .

[0043] Working principle:

[0044] In actual use, the screw rod 6 is driven to rotate by the driving motor 14, and the screw rod 6 can drive the lifting plate 7 to descend and rise when rotating. The movement of the lifting plate 7 can drive the fixed plate 8 to move, and the movement of the fixed plate 8 can drive the connecting pin 9 to move together. The connecting pin shaft 9 can drive the bending rod 10 to move when it moves, and the bending rod 10 can drive the connecting rod 11 to move when it moves. When the connecting rod 11 moves, it can drive the blade 13 to change its angle.

[0045] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A wind turbine generator set pitch control device, comprising a housing (1) and a head (2), characterized in that: The sealing head (2) is fixedly connected to the outer shell (1); a bracket (3) is arranged inside the outer shell (1); the bracket (3) is fixedly connected to the inner wall of the outer shell (1); vertical plates (4) are fixedly connected to the bracket (3) at equal intervals; adjustment grooves (5) are arranged inside the vertical plates (4); and a driving mechanism is arranged on the bracket (3); The driving mechanism is used to drive the blades to rotate at an angle to achieve a variable pitch effect.

2. A wind turbine pitch control device according to claim 1, characterized in that: The driving mechanism comprises a screw rod (6), a lifting plate (7) and a fixing plate (8); The screw rod (6) is rotatably connected to the inside of the bracket (3), the lifting plate (7) is threadedly connected to the outside of the screw rod (6), and the fixed plates (8) are equidistantly fixedly connected above the lifting plate (7), and the number of the fixed plates (8) is consistent with the number of the vertical plates (4).

3. A wind turbine pitch control device according to claim 1, characterized in that: The driving mechanism further comprises a connecting pin (9), a bent rod (10) and a connecting rod (11); The connecting pins (9) are all rotatably connected to the fixed plate (8), the bent rods (10) are all rotatably connected to the corresponding connecting pins (9), and the connecting rods (11) are all rotatably connected to the corresponding bent rods (10).

4. A wind turbine generator pitch control device according to claim 1, characterized in that: The upper part of the housing (1) is equidistantly connected to a bearing seat (12), the interior of the bearing seat (12) is rotatably connected to a blade (13), and one end of the blade (13) is fixedly connected to a corresponding connecting rod (11).

5. A wind turbine pitch control device according to claim 1, characterized in that: A driving motor (14) is fixedly connected to the top of the bracket (3), and an output end of the driving motor (14) is fixedly connected to the screw rod (6).

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