Wind power variable pitch fixing structure

Abstract

The utility model discloses a wind power variable pitch fixing structure which comprises a wind power hub, the wind power hub is provided with three mounting ports, each mounting port is provided with a large bearing, and each large bearing comprises an inner bearing ring and an outer bearing ring; a positioning ring is arranged on the outer side of the outer bearing ring, a plurality of positioning threaded columns are arranged on the peripheral side of the mounting opening, through holes allowing the positioning threaded columns to penetrate through are formed in the positioning ring, an annular positioning block is arranged on the outer side of the inner bearing ring, an inner gear ring is arranged on the annular positioning block, and a supporting frame is arranged on the portion, on the inner side of the mounting opening, of the wind power hub. A transmission gear used for being meshed with the inner gear ring is arranged on the supporting frame, a gear motor used for driving the transmission gear to rotate is arranged on the supporting frame, the gear motor rotates by one circle to drive the inner bearing ring to rotate by a certain distance, in this way, the fine adjustment effect is achieved, and the dip angle of the blade can be accurately adjusted; and large errors are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power pitch, in particular to a wind power pitch fixing structure. Background Technique

[0002] In recent years, the development and utilization of renewable energy have received extensive attention from countries around the world. Among them, wind power generation, as the most widely used renewable energy, has been widely studied and utilized. With the rapid development and mature application of wind power technology since the 21st century, the competition between wind power and other energy sources has become increasingly fierce. It is becoming increasingly crucial to ensure the safety and stability of the operation of the wind turbines of the operation manufacturers, improve the power generation capacity of the wind turbines, reduce the time of fault operation and maintenance, and improve the efficiency in the increasingly competitive energy market by enhancing the power generation performance.

[0003] Currently, in large-scale wind turbines, variable-speed variable-pitch wind turbines are generally adopted. When installing and fixing the blades in the existing wind power pitch, the angle of the blades is mostly adjusted by an oil cylinder. The amplitude of the telescopic movement of the oil cylinder has a huge impact on the adjustment angle of the blades. A slight telescopic degree can bring about a large change in the inclination angle of the blades, and it is very difficult to achieve precise adjustment, which poses a safety hazard. Content of the Utility Model

[0004] To solve the defect that in the existing technology, the angle of the blade is mostly adjusted by an oil cylinder, and the amplitude of the telescopic movement of the oil cylinder has a huge impact on the adjustment angle of the blade. A slight telescopic degree can bring about a large change in the inclination angle of the blade, and it is very difficult to achieve precise adjustment, which poses a safety hazard, the utility model provides a wind power pitch fixing structure.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] A fixed structure for wind power pitch adjustment of the utility model includes a wind power hub. The wind power hub is provided with three installation ports, which are equally divided on the wind power hub. Each installation port is equipped with a large bearing. The large bearing includes an inner bearing ring and an outer bearing ring, and a plurality of bearing balls are arranged between the inner bearing ring and the outer bearing ring. A positioning ring is arranged on the outer side of the outer bearing ring. A plurality of positioning threaded posts are arranged on the periphery of the installation port. The positioning ring is provided with through holes for the positioning threaded posts to pass through. A locking cap is arranged at the outer end of the positioning threaded post. An annular positioning block is arranged on the outer side of the inner bearing ring. An internal gear ring is arranged on the annular positioning block. A support frame is arranged on the inner side of the installation port of the wind power hub. A transmission gear for meshing with the internal gear ring is arranged on the support frame. A reduction motor for driving the transmission gear to rotate is arranged on the support frame. A worm and gear transmission device is arranged between the transmission gear and the reduction motor. A positioning plate is arranged at the outer end of the inner bearing ring, and a plurality of positioning posts for connecting with the end of the blade are arranged on the positioning plate.

[0007] As a preferred technical solution of the utility model, the outer bearing ring and the inner bearing ring are provided with alignment marks.

[0008] As a preferred technical solution of the utility model, an angle sensor for detecting the rotation angle between the inner bearing ring and the outer bearing ring is arranged on the outer bearing ring.

[0009] As a preferred technical solution of the utility model, the annular positioning block and the inner bearing ring are integrally formed.

[0010] As a preferred technical solution of the utility model, the locking cap and the positioning threaded post are full-welded.

[0011] The beneficial effects of the utility model are as follows:

[0012] In this fixed structure for wind power pitch adjustment, the blade is docked with the wind power hub through a large bearing. Then, an annular positioning block is arranged on the outer side of the inner bearing ring. An internal gear ring is arranged on the annular positioning block. A support frame is arranged on the inner side of the installation port of the wind power hub. A transmission gear for meshing with the internal gear ring is arranged on the support frame. By the meshing of the transmission gear and the internal gear ring, the rotation of the reduction motor is used to drive the transmission gear to rotate. Then, the rotation of the transmission gear is used to drive the slow rotation of the inner bearing, so as to adjust the inclination angle of the power generation blade. The reduction motor needs to rotate one circle to drive the inner bearing ring to rotate a little distance, which plays a role of fine adjustment, so that the accurate adjustment of the blade inclination angle can be realized without large errors. Description of the Drawings

[0013] The accompanying drawings are used to provide a further understanding of the present utility model and form a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0014] Figure 1 is a schematic structural view of a wind power pitch fixing structure of the present utility model;

[0015] Figure 2 is a schematic structural view of a large bearing of a wind power pitch fixing structure of the present utility model;

[0016] Figure 3 is a schematic structural view of a large shaft of a wind power pitch fixing structure of the present utility model;

[0017] Figure 4 is a schematic structural view of an installation opening of a wind power pitch fixing structure of the present utility model.

[0018] In the figure: 1, wind power hub; 2, large bearing; 3, inner bearing ring; 4, outer bearing ring; 5, bearing ball; 6, positioning ring; 7, positioning threaded post; 8, through hole; 9, locking cap; 10, annular positioning block; 11, internal gear ring; 12, support frame; 13, transmission gear; 15, positioning plate; 16, positioning post. Specific embodiments

[0019] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.

[0020] Embodiment 1: As Figures 1-4As shown in the figure, a fixed structure for wind power pitch adjustment of the present utility model includes a wind power hub 1. The wind power hub 1 is provided with three mounting ports, which are equally divided on the wind power hub. Each mounting port is installed with a large bearing 2. The large bearing 2 includes an inner bearing ring 3 and an outer bearing ring 4, and a plurality of bearing balls 5 are provided between the inner bearing ring 3 and the outer bearing ring 4. A positioning ring 6 is provided on the outer side of the outer bearing ring 4. A plurality of positioning threaded columns 7 are arranged on the periphery of the mounting port. The positioning ring 6 is provided with through holes 8 for the positioning threaded columns 7 to pass through. A locking cap 9 is provided at the outer end of the positioning threaded column 7. An annular positioning block 10 is provided on the outer side of the inner bearing ring 3. An internal gear ring 11 is provided on the annular positioning block 10. The wind power hub 1 is provided with a support frame 12 on the inner side of the mounting port. A transmission gear 13 for meshing with the internal gear ring 11 is provided on the support frame 12. A reduction motor for driving the transmission gear 13 to rotate is provided on the support frame 12. A worm and worm gear transmission device is provided between the transmission gear 13 and the reduction motor. A positioning plate 15 is provided at the outer end of the inner bearing ring 3. A plurality of positioning columns 16 connected to the end of the blade are provided on the positioning plate 15. It is docked with the wind power hub 1 through the large bearing 2. Then, an annular positioning block 10 is provided on the outer side of the inner bearing ring 3. An internal gear ring 11 is provided on the annular positioning block 10. The wind power hub 1 is provided with a support frame 12 on the inner side of the mounting port. A transmission gear 12 for meshing with the internal gear ring 11 is provided on the support frame 12. By the meshing of the transmission gear 12 and the internal gear ring 11, the rotation of the reduction motor is used to drive the transmission gear 12 to rotate. By the rotation of the transmission gear 12, the inner bearing ring 3 is driven to rotate slowly, so as to adjust the inclination angle of the power generation blade. Among them, the reduction motor rotates one circle to drive the inner bearing ring 3 to rotate a little distance, which plays a role of fine adjustment, so that the accurate adjustment of the blade inclination angle can be realized, and no large error will occur.

[0021] Alignment marks are provided between the outer bearing ring 4 and the inner bearing ring 3, which is convenient for zero-position alignment of the blades, so that the inclination angles of each blade are the same, ensuring the unity of adjustment.

[0022] As Figure 4 As shown in the figure, an angle sensor for detecting the rotation angle between the inner bearing ring 3 and the outer bearing ring 4 is provided on the outer bearing ring 4, which is convenient for adjusting the rotation angle of the blade inclination.

[0023] The annular positioning block 10 and the inner bearing ring 3 are integrally formed, which has strong stability. The locking cap 9 and the positioning threaded column 7 are fully welded and are not easy to loosen and fall off.

[0024] Working principle: It is docked with the wind power hub 1 through a large bearing 2. Then, an annular positioning block 10 is provided on the outer side of the inner bearing ring 3. An internal gear ring 11 is provided on the annular positioning block 10. And a support frame 12 is provided on the inner side of the installation opening of the wind power hub 1. A transmission gear 12 for meshing with the internal gear ring 11 is provided on the support frame 12. By the meshing of the transmission gear 12 and the internal gear ring 11, the rotation of the reduction motor is used to drive the transmission gear 12 to rotate. Then, the rotation of the transmission gear 12 drives the slow rotation of the inner bearing ring 3, so as to adjust the inclination angle of the power generation blade. Among them, the reduction motor needs to rotate one circle to drive the inner bearing ring 3 to rotate a little distance, which plays a role of fine adjustment. In this way, the precise adjustment of the blade inclination angle can be realized without large errors.

[0025] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fixed structure for a wind turbine pitch, characterized in that, It includes a wind power hub (1). The wind power hub (1) is provided with three mounting openings, and the three mounting openings are equiangularly arranged on the wind power hub. Each mounting opening is installed with a large bearing (2). The large bearing (2) includes an inner bearing ring (3) and an outer bearing ring (4), and a plurality of bearing balls (5) are arranged between the inner bearing ring (3) and the outer bearing ring (4); a positioning ring (6) is arranged on the outer side of the outer bearing ring (4), a plurality of positioning threaded posts (7) are arranged on the periphery of the mounting opening, the positioning ring (6) is provided with through holes (8) for the positioning threaded posts (7) to pass through, a locking cap (9) is arranged at the outer end of the positioning threaded post (7), and an annular positioning block (10) is arranged on the outer side of the inner bearing ring (3). An internal gear ring (11) is arranged on the annular positioning block (10), and a support frame (12) is arranged on the inner side of the mounting opening of the wind power hub (1). A transmission gear (13) for meshing with the internal gear ring (11) is arranged on the support frame (12), and a reduction motor for driving the transmission gear (13) to rotate is arranged on the support frame (12). A worm and worm gear transmission device is arranged between the transmission gear (13) and the reduction motor. A positioning plate (15) is arranged at the outer end of the inner bearing ring (3), and a plurality of positioning posts (16) connected to the end of the blade are arranged on the positioning plate (15).

2. The fixed structure of the wind turbine pitch according to claim 1, characterized in that The outer bearing ring (4) and the inner bearing ring (3) are provided with alignment marks.

3. The fixed structure for variable pitch of a wind turbine according to claim 1, characterized in that, An angle sensor for detecting the rotation angle between the inner bearing ring (3) and the outer bearing ring (4) is arranged on the outer bearing ring (4).

4. A wind power pitch fixing structure according to claim 3, characterized in that, The annular positioning block (10) and the inner bearing ring (3) are integrally formed.

5. A fixed structure for wind turbine pitch control according to claim 1, characterized in that, The locking cap (9) and the positioning threaded post (7) are fully welded and connected.

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