Zero alignment device for wind power blade

Abstract

The utility model relates to the technical field of wind power blade maintenance, and provides a wind power blade zero alignment device which comprises a blade alignment laser transmitter and a hub alignment laser transmitter and further comprises a hollow through hole formed in the middle of a base, the hub alignment laser transmitter is installed in the hollow through hole in a penetrating mode, and a level bubble is installed on the upper end face of the base. The base is used for observing the levelness of the base, three supporting pieces are rotatably installed on the lower portion of the base, the supporting pieces can stretch out and draw back to adjust the supporting length so as to adjust the levelness of the base, the synchronous structure is installed among the three supporting pieces and used for synchronously rotating the three supporting pieces and limiting the rotating angle, and the longitudinal sliding rod set is installed between the base and the synchronous structure. Longitudinal movement of the synchronous structure is limited. The problem that in the prior art, a plane formed by laser emitted by a wind power blade zero alignment device is prone to generating vertical deviation from the horizontal plane is solved.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine blade maintenance technology, specifically to a wind turbine blade zero-position alignment device. Background Technology

[0002] Zero alignment of wind turbine blades is a crucial step in wind turbine maintenance, ensuring that the initial angle (zero line) of the blades is aligned with the hub reference line.

[0003] The cause of zero-position misalignment is that the air disturbances, eddies and airflow around the nacelle generated by the blade rotation will affect the accuracy of the wind measurement system. After long-term operation, the yaw error and the blade zero-position pitch angle error will accumulate, further reducing the power generation efficiency.

[0004] Currently, there are generally two methods for zero-position alignment of wind turbine blades. One method is traditional visual alignment, but visual alignment mainly relies on manual operation. Differences in the accuracy of different operators or equipment can lead to alignment deviations. There are also some laser-type zero-position alignment devices, such as a blade zero-position alignment device with Chinese patent publication number CN221482075U and a wind turbine blade zero-position alignment device with Chinese patent publication number CN213711237U. These two devices use the light emitted by two lasers (blade alignment laser emitter and hub alignment laser emitter) to illuminate the hub reference line and blade reference line respectively on a plane (defined as plane a) to measure and maintain the blade zero-position alignment. However, when the two reference lines are perpendicular to each other in space and form a coplanar plane (defined as plane b), plane b is not perpendicular to the horizontal plane and has a deviation angle. If the laser-type alignment device is not horizontal enough during installation and has a vertical deviation, plane a may still be aligned with plane b, which will have a certain alignment deviation. Utility Model Content

[0005] This invention proposes a zero-position alignment device for wind turbine blades, which solves the problem that the plane formed by the laser emitted by the existing zero-position alignment device for wind turbine blades is prone to vertical deviation from the horizontal plane.

[0006] The technical solution of this utility model is as follows: A wind turbine blade zero-position alignment device, comprising a blade alignment laser emitter and a hub alignment laser emitter, and further comprising:

[0007] The base has a hollow through-hole in the middle, and the wheel hub is aligned with the laser emitter and installed through the hollow through-hole.

[0008] A spirit level is installed on the upper surface of the base to observe the levelness of the base.

[0009] The base has three rotatable support components at its lower part. These support components can extend and retract to adjust their length, thereby adjusting the levelness of the base.

[0010] A synchronous structure is installed between three support members to allow the three support members to rotate synchronously and to limit the rotation angle.

[0011] A longitudinal sliding rod assembly is installed between the base and the synchronization structure to limit the longitudinal movement of the synchronization structure;

[0012] Support side plate one is fixedly connected to the base, and the blade is rotatably connected to the laser emitter.

[0013] The protractor has a support side plate two fixedly connected to its base, and the protractor is fixedly connected to the support side plate two.

[0014] A limiting component is installed between the protractor and the blade alignment laser emitter to limit the rotational adjustment position of the blade alignment laser emitter on the protractor.

[0015] Preferably, the support member includes:

[0016] Fixed legs, rotatably mounted on the lower part of the base;

[0017] The telescopic leg has a hollow groove on the lower side of the fixed leg, and the telescopic leg is slidably connected in the hollow groove;

[0018] The locking screw has a threaded hole on the fixing leg that is compatible with the locking screw, and the threaded hole is connected to the hollow groove.

[0019] Preferably, the synchronization structure includes:

[0020] The connecting ring and the hub are aligned so that the laser emitted by the laser emitter can penetrate the central cavity of the connecting ring;

[0021] The connecting rod has one end rotatably mounted on the connecting ring, and the other end is fixedly connected to a fixing plate, which has a through hole.

[0022] Fixing plate two is fixedly connected to the inner side of fixing leg, and fixing plate two has a through hole two;

[0023] The screw assembly, passing through through hole one and through hole two, is used to control the rotation or locking of fixing plate one on fixing plate two.

[0024] Preferably, the limiting element includes:

[0025] A fixing screw is installed on the side of the blade aligned with the laser emitter. An arc-shaped through slot is provided on the protractor, and the fixing screw passes through the arc-shaped through slot.

[0026] The locking nut, threadedly connected to the other end of the fixing screw, can limit and fix the position of the fixing screw in the arc-shaped through groove.

[0027] Preferably, the screw assembly includes:

[0028] Screw 1, through hole 1 and through hole 2;

[0029] The screw head is fixed to one end of the screw.

[0030] Nut 1, the other end of threaded connection screw 1.

[0031] Preferably, the longitudinal sliding rod assembly includes:

[0032] A fixing rod is fixedly connected to the lower end face of the base and has a hollow groove.

[0033] The telescopic rod is fixedly connected to the upper section of the connecting ring and slidably installed in the hollow groove.

[0034] The working principle and beneficial effects of this utility model are as follows:

[0035] In this invention, when placing the wind turbine blade zero-position alignment device, the level is checked by observing whether the spirit level is centered. If it is not centered, the synchronization structure is first adjusted to allow the support to rotate. Then, the support length of the support is adjusted according to the position of the spirit level on the base, thereby adjusting the spirit level to reach the center. After the horizontal adjustment is completed, since the laser plane 'a' emitted by the wind turbine blade zero-position alignment device is perpendicular to the base plane, when the base plane is horizontal, plane 'a' is perpendicular to the horizontal plane, which can effectively control the vertical deviation of the wind turbine blade device.

[0036] 2. In this utility model, the limiter is set between the protractor and the blade alignment laser emitter. The protractor has an arc-shaped hollow slot, and the limiter passes through the hollow slot. When the limiter is not fixed, the blade alignment laser emitter is aligned with the blade zero line by adjusting the angle of the limiter, and then fixed on the protractor by the limiter, the angle can be read and recorded. Attached Figure Description

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0039] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0040] Figure 3 This is a schematic diagram of the structure of the spirit level in this utility model;

[0041] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the local structure at point A;

[0042] Figure 5 This utility model Figure 2 A magnified view of the local structure at point B.

[0043] In the picture:

[0044] 1. Blade-aligned laser emitter; 2. Hub-aligned laser emitter; 3. Base; 4. Spirit level; 5. Support side plate one; 6. Support side plate two; 7. Protractor; 101. Fixed leg; 102. Telescopic leg; 103. Locking screw; 201. Connecting ring; 202. Connecting rod; 203. Fixing plate one; 204. Fixing plate two; 301. Fixing screw; 302. Locking nut; 401. Screw one; 402. Screw head; 403. Nut one; 501. Fixing rod; 502. Telescopic rod. Detailed Implementation

[0045] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0046] like Figures 1 to 5 As shown in the figure, this embodiment proposes a wind turbine blade zero-position alignment device, including a blade alignment laser emitter 1, a hub alignment laser emitter 2, a base 3, a spirit level 4, a support component, a synchronization structure, a support side plate, a protractor 7, and a limiting component.

[0047] In this embodiment, the blade alignment laser emitter 1 and the hub alignment laser emitter 2 are laser emitters in a blade zero-position alignment device with Chinese patent publication number CN221482075U. When in use, pressing a button can emit a cross laser.

[0048] In this embodiment, a hollow through hole is provided in the middle of the base 3, and the hub-aligned laser emitter 2 is installed through the hollow through hole. The bottom of the hub-aligned laser emitter 2 emits laser A downwards, and the blade-aligned laser emitter 1 emits laser B.

[0049] A spirit level 4 is mounted on the upper surface of the base 3 to observe the levelness of the base 3. The spirit level 4 is a component in the prior art capable of observing whether the base is level. Figure 3 As shown, there is a circle on the surface and a bubble inside. When the bubble is centered in the circle, it indicates that the plane is horizontal.

[0050] In this embodiment, three support members are rotatably installed on the lower part of the base 3. The support members can extend and retract to adjust the length of the support, thereby adjusting the levelness of the base 3.

[0051] Specifically, the support components include a fixed leg 101, a telescopic leg 102, and a locking screw 103. The fixed leg 101 is rotatably mounted on the lower part of the base 3. A hollow groove is formed on the lower side of the fixed leg 101, and the telescopic leg 102 is slidably connected in the hollow groove, with its bottom end extending to the outside. The fixed leg 101 has a threaded hole that matches the locking screw 103, and the threaded hole communicates with the hollow groove. For example, if three support components are used, there will be three telescopic legs 102. The telescopic legs 102 can be controlled to extend or retract independently. Based on the principle of determining a plane using three points, the levelness of the base 3 can be precisely adjusted.

[0052] In this embodiment, a synchronization structure is installed between three support members to allow the three support members to rotate synchronously and to limit the rotation angle.

[0053] like Figures 4 to 5 As shown, the synchronization structure includes a connecting ring 201, a connecting rod 202, a second fixing plate 204, and a screw assembly. Laser A can penetrate the central cavity of the connecting ring 201. One end of the connecting rod 202 is rotatably mounted on the connecting ring 201, and the other end is fixedly connected to a first fixing plate 203, which has a through hole. The second fixing plate 204 is fixedly connected to the inner side of the fixing leg 101, and also has a through hole. The screw assembly passes through both through holes one and two, and is used to control the rotation or locking of the first fixing plate 203 on the second fixing plate 204.

[0054] like Figure 5 As shown, the screw assembly includes screw 401, screw head 402, and nut 403. Screw 401 passes through through hole 1 and through hole 2. Screw head 402 is fixed to one end of screw 401. Nut 403 is threadedly connected to the other end of screw 401.

[0055] The main function of the synchronization structure is to limit the synchronous rotation of multiple support components and to have an angle locking function. Without the synchronization structure, the support components will rotate separately and in an uncoordinated manner, which is difficult to operate and cannot fix the support components to the appropriate angle.

[0056] In this embodiment, a longitudinal sliding rod assembly is installed between the base 3 and the synchronization structure to restrict the longitudinal movement of the synchronization structure. The longitudinal sliding rod assembly includes a fixed rod 501 and a telescopic rod 502. The fixed rod 501 is fixedly connected to the lower end face of the base 3 and has a hollow groove. The telescopic rod 502 is fixedly connected to the upper section of the connecting ring 201 and is slidably installed in the hollow groove.

[0057] It is mainly used to limit the longitudinal displacement of the synchronization structure in space. Without the longitudinal sliding rod group, the synchronization structure may rise or fall unevenly.

[0058] In this embodiment, the first support plate 5 is fixedly connected to the base 3, the blade-aligned laser emitter 1 is rotatably connected to the first support plate 5, the second support plate 6 is fixedly connected to the base 3, and the protractor 7 is fixedly connected to the second support plate 6.

[0059] In this embodiment, a limiting member is disposed between the protractor 7 and the blade alignment laser emitter 1 to limit the rotation adjustment position of the blade alignment laser emitter 1 on the protractor 7.

[0060] like Figure 2 As shown, the limiting component includes a fixing screw 301 and a locking nut 302. The fixing screw 301 is installed on the side of the blade aligned with the laser emitter 1. An arc-shaped through groove is provided on the protractor 7. The fixing screw 301 passes through the arc-shaped through groove. The locking nut 302 is threaded to the other end of the fixing screw 301, which can limit the position of the fixing screw 301 in the arc-shaped through groove.

[0061] Working principle: This wind turbine blade zero-position alignment device is used above a large wind turbine, at the junction of the hub and the blade. The hub has a zero-position reference line, and the blade has a zero-position reference line. The wind turbine blade zero-position alignment reference device is placed on the hub to align the hub zero-position reference line and the blade reference line.

[0062] In use, first adjust the fixed legs 101. The three fixed legs 101 are connected to the connecting ring 201. There is a telescopic rod 502 and a fixed rod 501 between the connecting ring 201 and the base 3. The extension and retraction of the telescopic rod 502 can restrict the longitudinal movement of the connecting ring 201, so that the three fixed legs 101 can be adjusted synchronously. When the fixed legs 101 can stably support the device, rotate the nut 403 to move it on the screw 401, and clamp it with the screw head 402 to make the fixing plate 203 and the fixing plate 204 fit tightly together. This will allow the fixed legs 101 to be in place. After adjusting the angle and placing the wind turbine blade zero-position alignment device, observe the level bubble 4 on the upper surface of the base 3. Check if the bubble is centered in the circle. If it is not centered, it means that the wind turbine blade zero-position alignment device is not level and needs to be adjusted. During adjustment, adjust the three telescopic legs 102 according to the position of the bubble until the level bubble 4 on the upper surface of the base 3 is centered in the circle. Then tighten the locking screw 103 through the threaded hole to hold the telescopic legs 102 in place and fix the telescopic length, thereby fixing the horizontal plane.

[0063] After the horizontal position of the wind turbine blade zero-position alignment device is adjusted, turn on the hub alignment laser emitter 2. The hub alignment laser emitter 2 emits laser A to align with the hub reference line. Then turn on the blade alignment laser emitter 1, and first loosen the locking nut 302. Then rotate the angle of the blade alignment laser emitter 1 and adjust the laser B emitted by the blade alignment laser emitter 1 to align with the blade zero-position reference line. Then tighten the locking nut 302 on the fixing screw 301 until it is in contact with the protractor 7, so that the blade alignment laser emitter 1 is fixed and the rotation adjustment angle is read and recorded. At this time, the two lasers emitted by the blade alignment laser emitter 1 and the hub alignment laser emitter 2 will form a plane and remain perpendicular to the horizontal plane. Then the wind turbine blade zero-position alignment check can be performed.

[0064] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wind turbine blade zero-position alignment device, comprising a blade alignment laser emitter (1) and a hub alignment laser emitter (2), characterized in that, Also includes: The base (3) has a hollow through hole in the middle, and the hub is installed through the laser emitter (2). A spirit level (4) is installed on the upper surface of the base (3) to observe the levelness of the base (3); Support members: Three support members are rotatably mounted on the lower part of the base (3). The support members can extend and retract to adjust the length of the support, thereby adjusting the levelness of the base (3). A synchronization structure is installed between the three support members to allow the three support members to rotate synchronously and to limit the rotation angle. A longitudinal sliding rod assembly is installed between the base (3) and the synchronization structure to restrict the longitudinal movement of the synchronization structure; Support side plate 1 (5) is fixedly connected to the base (3), and the blade is rotatably connected to the laser emitter (1) on the support side plate 1 (5); The protractor (7) is fixedly connected to the base (3) with a second support plate (6). The protractor (7) is fixedly connected to the second support plate (6). A limiting component is provided between the protractor (7) and the blade alignment laser emitter (1) to limit the rotation adjustment position of the blade alignment laser emitter (1) on the protractor (7).

2. The wind turbine blade zero-position alignment device according to claim 1, characterized in that, The support member includes: Fixed leg (101) is rotatably mounted on the lower part of the base (3); Telescopic leg (102), the lower side of the fixed leg (101) is provided with a hollow groove, and the telescopic leg (102) is slidably connected in the hollow groove; The locking screw (103) has a threaded hole on the fixing leg (101) that is adapted to the locking screw (103), and the threaded hole communicates with the hollow groove.

3. The wind turbine blade zero-position alignment device according to claim 2, characterized in that, The synchronization structure includes: The connecting ring (201) allows the laser emitted by the hub-aligned laser emitter (2) to penetrate the central cavity of the connecting ring (201); The connecting rod (202) has one end rotatably mounted on the connecting ring (201), and the other end is fixedly connected to a fixing plate (203), which has a through hole. Fixing plate two (204) is fixedly connected to the inner side of the fixing leg (101), and the fixing plate two (204) has a through hole two; The screw assembly passes through the first through hole and the second through hole, and is used to control the first fixing piece (203) to rotate or lock on the second fixing piece (204).

4. The wind turbine blade zero-position alignment device according to claim 1, characterized in that, The limiting component includes: A fixing screw (301) is installed on the side of the blade-aligned laser emitter (1), and an arc-shaped through groove is provided on the protractor (7), through which the fixing screw (301) passes; The locking nut (302) is threaded to the other end of the fixing screw (301) and can limit the position of the fixing screw (301) in the arc-shaped through groove.

5. A wind turbine blade zero-position alignment device according to claim 3, characterized in that, The screw assembly includes: Screw 1 (401) passes through the first through hole and the second through hole; The screw head (402) is fixed to one end of the screw (401); Nut 1 (403) is threaded to the other end of screw 1 (401).

6. A wind turbine blade zero-position alignment device according to claim 3, characterized in that, The longitudinal sliding rod assembly includes: A fixing rod (501) is fixedly connected to the lower end face of the base (3) and has a hollow groove. The telescopic rod is fixedly connected to the upper end face of the connecting ring (201) and slidably installed in the hollow groove.

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