Blade zero calibration device of wind generating set

Abstract

The utility model relates to a blade zero calibration device of a wind generating set. The blade zero calibration device of the wind generating set comprises a supporting column which comprises an adsorption end and a connecting end which are oppositely arranged, the adsorption end is provided with a magnetic adsorption part, and the magnetic adsorption part is used for being magnetically adsorbed with a hub; the laser is arranged on the laser support, and the laser support is rotationally connected to the connecting end of the supporting column around an axis; wherein a correction reference is arranged on the surface of the supporting column, the correction reference extends in the axial direction of the supporting column, and the correction reference and the axis of laser emitted by the laser device are coplanar. The blade zero calibration device of the wind generating set is high in zero calibration accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a blade zeroing device for a wind turbine generator set. Background Art

[0002] The blades of common wind turbine generator sets on the market imitate the airfoil of birds and are similar to the wings of an airplane. The blades obtain driving force by using the pressure of the fluid, and the magnitude of the fluid pressure is related to the shape of the blade in the fluid, that is, related to the angle of attack of the blade. The angle of attack of the blade not only affects the power output curve and power generation of the wind turbine generator set, but also affects the uniformity of the wind load received by the wind turbine generator set. Therefore, a pitch control system is generally set in the wind turbine generator set to ensure that the blades receive wind at the best angle of attack under different wind speeds, so as to optimize the power output. Therefore, when maintenance personnel perform blade system debugging, they must ensure that the zero position scale line of the blade coincides precisely with the zero position scale line of the hub to ensure that the blade obtains the best angle of attack during the blade opening operation, so as to optimize the power curve of the wind turbine generator set. The current blade zeroing scheme usually uses a scale to achieve calibration. Specifically, during the pitch change process, the scale is closely attached to the zero position scale line of the hub, and the relative position between the scale and the zero position scale line of the blade is observed. By continuously adjusting, it is ensured that the scale exactly indicates the zero position scale line of the blade, and the blade angle at this time is recorded as the basis for blade zero position calibration. However, this calibration scheme has the problem of relatively large calibration error. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a blade zeroing device for a wind turbine generator set with relatively high zeroing accuracy.

[0004] An embodiment of the present application provides a blade zeroing device for a wind turbine generator set, including:

[0005] A support column, including an adsorption end and a connection end arranged oppositely, the adsorption end is provided with a magnetic adsorbent, and the magnetic adsorbent is used for magnetic adsorption with the hub; and

[0006] A laser and a laser bracket, the laser is arranged on the laser bracket, and the laser bracket is rotationally connected to the connection end of the support column around an axis;

[0007] Wherein, a calibration reference is provided on the surface of the support column, the calibration reference extends along the axial direction of the support column, and the calibration reference and the axis of the laser emitted by the laser are coplanar.

[0008] In one embodiment, at least one linear groove is provided on the outer wall of the support column, the linear groove includes two groove walls arranged oppositely in a first direction, and the two groove walls extend along the axial direction of the support column;

[0009] A plane parallel to the two groove walls and equidistant from the two groove walls is defined as a reference plane. The intersection line of the reference plane and the bottom wall of the linear groove forms a calibration reference. The axis of the laser emitted by the laser is located in the reference plane.

[0010] In one embodiment, the laser bracket includes two first connecting arms spaced apart along a first direction, a portion of the shaft section of the support column close to the connecting end is formed as a second connecting arm, two surfaces of the second connecting arm along the first direction are clamped between the two first connecting arms, and the second connecting arm is connected to the two first connecting arms for rotation around an axis;

[0011] The axis is perpendicular to the groove wall, and two surfaces of the second connecting arm along the first direction are parallel to the reference plane and are equidistant from the reference plane.

[0012] In one embodiment, the laser bracket further comprises a main body, which is connected to the side of the two first connecting arms away from the support column; the main body is provided with a mounting hole, and the laser is inserted and connected in the mounting hole;

[0013] The axis of the mounting hole coincides with the axis of the laser emitted by the laser, and the axis of the mounting hole is parallel to the two surfaces of the second connecting arm along the first direction, and is equidistant from the two surfaces.

[0014] In one of the embodiments, the blade zeroing device further includes an adjustment member;

[0015] The adjusting piece is threadedly connected to the main body, and the end of the adjusting piece extends into the inner side of the mounting hole and presses against the laser.

[0016] In one of the embodiments, the blade zeroing device further includes a connecting bolt and a butterfly nut;

[0017] The tail of the connecting bolt passes through one of the first connecting arms, the second connecting arm, and the other first connecting arm in sequence; the butterfly nut is threadedly connected to the tail of the connecting bolt.

[0018] In one embodiment, a chamfered structure is provided at the root of the second connecting arm.

[0019] In one embodiment, the distance between the two first connecting arms is equal to the thickness of the second connecting arm along the first direction.

[0020] In one embodiment, the number of the linear grooves is two, and the two linear grooves are located on two opposite sides of the support column in the circumferential direction and extend along the axial direction of the support column.

[0021] In one embodiment, a mounting groove is provided on the end surface of the adsorption end, and the magnetic adsorption member is inserted into the mounting groove. The end of the magnetic adsorption member is exposed from the notch of the mounting groove and is flush with the end surface of the adsorption end.

[0022] Beneficial effects of the blade zeroing device of the above-mentioned wind turbine generator:

[0023] Since the adsorption end of the support column is provided with a magnetic adsorption accessory for magnetically adsorbing with the hub, the detachable connection between the blade zeroing device and the hub can be realized through the magnetic adsorption between the adsorption end and the hub. The connection and disconnection processes are both relatively simple and easy to operate, making the blade zeroing device of the wind turbine generator have good portability.

[0024] By providing a laser and a laser bracket, the laser bracket is rotatably connected to the connection end of the support column around an axis. Therefore, the relative position between the laser emitted by the laser and the blade can be adjusted by adjusting the rotation angle of the laser bracket around this axis relative to the support column.

[0025] Since the surface of the support column is provided with a calibration reference extending along the axial direction of the support column, and the calibration reference and the axis of the laser emitted by the laser are coplanar. During zeroing, as long as the calibration reference on the outer wall of the support column is aligned with the center line of the hub zero position scale line, the axis of the laser emitted by the laser can be coplanar with the center line of the hub zero position scale line. At this time, rotate the blade until the laser is aligned with the blade zero position scale line and the axis of the laser is aligned with the center line of the blade zero position scale line, then the alignment between the blade zero position scale line and the hub zero position scale line can be realized, and the zeroing of the blade can be achieved. The overall structure of the blade zeroing device itself is relatively simple, the zeroing process is also relatively simple and easy to operate. In addition, due to the collimation of the laser, and the laser directly irradiates on the blade zero position scale line, it is easy to confirm at various viewing angles and there will be no misjudgment, which further improves the accuracy of zeroing. Description of the Drawings

[0026] Figure 1 Schematic diagram of the use state of the blade zeroing device of the wind turbine generator provided by the embodiment of the present application;

[0027] Figure 2 Exploded structure schematic diagram of the blade zeroing device of the wind turbine generator provided by the embodiment of the present application;

[0028] Figure 3 Schematic diagram of the structure of the blade zeroing device of the wind turbine generator provided by the embodiment of the present application;

[0029] Figure 4 Schematic diagram of the structure of the support column in the blade zeroing device of the wind turbine generator provided by the embodiment of the present application.

[0030] Explanation of the reference numerals in the drawings:

[0031] 100, blade zeroing device;

[0032] 10. Support column; 11. Adsorption end; 111. Installation groove; 12. Connection end; 13. Magnetic attachment; 14. Second connecting arm; 15. Chamfer structure;

[0033] 20. Laser;

[0034] 30. Laser bracket; 31. First connecting arm; 32. Main body; 321. Installation hole;

[0035] 40. Blade; 41. Blade zero scale line; 42. Hub; 43. Hub zero scale line;

[0036] 50. Calibration reference; 51. Linear groove; 52. Groove wall;

[0037] 60. Adjusting part; 61. Connecting bolt; 62. Wing nut;

[0038] F. First direction. Detailed implementation mode

[0039] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation mode of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0040] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0045] The blade zeroing device 100 of the wind turbine generator set according to the embodiment of the present application will be described below with reference to the accompanying drawings.

[0046] Figure 1 It is a schematic diagram of the use state of the blade zeroing device of the wind turbine generator set provided by the embodiment of the present application; Figure 2 It is an exploded structural schematic diagram of the blade zeroing device of the wind turbine generator set provided by the embodiment of the present application; Figure 3 It is a structural schematic diagram of the blade zeroing device of the wind turbine generator set provided by the embodiment of the present application; Figure 4 It is a structural schematic diagram of the support column in the blade zeroing device of the wind turbine generator set provided by the embodiment of the present application. In Figure 1 order to facilitate observation, only partial structures of the hub 42 and the blade 40 are shown.

[0047] Refer to Figure 1 、 Figure 2, the blade zeroing device 100 of the wind turbine provided by the embodiment of the present application includes: a support column 10, a laser 20, and a laser bracket 30.

[0048] The support column 10 includes an adsorption end 11 and a connection end 12 arranged oppositely. The adsorption end 11 is provided with a magnetic adsorbent 13, and the magnetic adsorbent 13 is used for magnetic adsorption with the hub. The laser 20 is arranged on the laser bracket 30, and the laser bracket 30 is rotatably connected to the connection end 12 of the support column 10 around an axis. Among them, a calibration reference 50 is provided on the surface of the support column 10, and the calibration reference 50 extends along the axial direction of the support column 10, and the axis of the calibration reference 50 and the laser emitted by the laser 20 are coplanar.

[0049] Since the adsorption end 11 of the support column 10 is provided with a magnetic adsorbent 13, and the magnetic adsorbent 13 is used for magnetic adsorption with the hub, therefore, the detachable connection between the blade zeroing device 100 and the hub can be realized by magnetic adsorption of the adsorption end 11 and the hub. The connection and disconnection processes are both relatively simple and easy to operate. This makes the blade zeroing device 100 of the wind turbine have good portability.

[0050] By setting the laser 20 and the laser bracket 30, and the laser bracket 30 is rotatably connected to the connection end 12 of the support column 10 around an axis, therefore, the relative position between the laser emitted by the laser 20 and the blade 40 can be adjusted by adjusting the rotation angle of the laser bracket 30 relative to the support column 10 around this axis. In Figure 1 the figure, the laser emitted by the laser 20 is shown as a solid black line, and this laser irradiates on the blade zero position scale line 41. The laser has the advantages of strong directivity, high brightness, good monochromaticity, and good coherence, which further ensures the zeroing result. Here, the laser 20 can be selected as a laser pointer, which has the characteristics of low price and easy procurement. In addition, the laser bracket 30 is an aluminum alloy matrix formed by casting, and the roughness and flatness are ensured by grinding.

[0051] Since the surface of the support column 10 is provided with a calibration reference 50, the calibration reference 50 extends along the axial direction of the support column 10, and the axis of the laser emitted by the calibration reference 50 and the laser 20 is coplanar. During zero calibration, as long as the calibration reference 50 on the outer wall of the support column 10 is aligned with the center line of the hub zero position scale line 43, the axis of the laser emitted by the laser 20 can be coplanar with the center line of the hub zero position scale line 43. At this time, rotate the blade 40 until the laser is aligned with the blade zero position scale line 41, and the center line of the laser is aligned with the center line of the blade zero position scale line 41, then the alignment between the blade zero position scale line 41 and the hub zero position scale line 43 can be achieved, and the zero calibration of the blade 40 can be realized. The entire blade zero calibration device 100 itself has a relatively simple structure, the zero calibration process is also relatively simple, and it is easy to operate. In addition, due to the collimation of the laser, combined with the fact that the laser directly irradiates the blade zero position scale line 41, it is easy to confirm at each viewing angle and there will be no misjudgment, which further improves the accuracy of zero calibration.

[0052] In the embodiment of the present application, in combination with Figure 1 and Figure 4 , at least one linear groove 51 is provided on the outer wall of the support column 10. The linear groove 51 includes two groove walls 52 arranged oppositely along the first direction F. The two groove walls 52 extend along the axial direction of the support column 10. A plane parallel to the two groove walls 52 and equidistant from the two groove walls 52 is defined as a reference plane. The intersection line of the reference plane and the bottom wall of the linear groove 51 forms a calibration reference, and the axis of the laser emitted by the laser 20 is located in the reference plane. With such a setting, it can be ensured that the calibration reference 50 and the axis of the laser emitted by the laser 20 are coplanar.

[0053] Of course, here, the case where the calibration reference is formed on the bottom wall of the linear groove 51 is taken as an example for illustration. In specific implementation, scale lines can also be printed on the surface of the support column 10, and the center line of the scale lines is used as the calibration reference.

[0054] In the embodiment of the present application, in combination with Figure 1 and Figure 2 , the laser bracket 30 includes two first connecting arms 31 arranged at intervals along the first direction F. A partial shaft section of the support column 10 near the connecting end 12 is formed as a second connecting arm 14. The two surfaces of the second connecting arm 14 along the first direction F are clamped between the two first connecting arms 31. The second connecting arm 14 is rotatably connected to the two first connecting arms 31 around the above-mentioned axis. Of course, this axis is perpendicular to the groove wall 52. The two surfaces of the second connecting arm 14 along the first direction F are parallel to the reference plane and equidistant from the reference plane.

[0055] With such a setting, when the first connecting arm 31 rotates around the axis relative to the second connecting arm 14, the axis of the laser still remains in the reference plane and will not deflect.

[0056] In the embodiment of the present application, the laser holder 30 further includes a main body portion 32, and the main body portion 32 is connected to a side of the two first connecting arms 31 facing away from the support column 10. The main body portion 32 is provided with a mounting hole 321, and the laser 20 is inserted and connected in the mounting hole 321. The axis of the mounting hole 321 coincides with the axis of the laser emitted by the laser 20, and the axis of the mounting hole 321 is parallel to the two surfaces of the second connecting arm 14 along the first direction F, and the distances from the two surfaces are equal.

[0057] Since the two surfaces of the second connecting arm 14 along the first direction F are parallel to the reference plane and the distances from the reference plane are equal, and in addition, the axis of the mounting hole 321 is parallel to the two surfaces of the second connecting arm 14 along the first direction F and the distances from the two surfaces are equal, so that the axis of the mounting hole 321 can be located on the reference plane. Combined with the fact that the axis of the mounting hole 321 coincides with the axis of the laser emitted by the laser 20, the axis of the laser emitted by the laser 20 can be located within the reference plane.

[0058] In the embodiment of the present application, the vane zeroing device 100 further includes an adjusting member 60. The adjusting member 60 is threadedly connected to the main body portion 32, and the end of the adjusting member 60 extends into the inner side of the mounting hole 321 and presses against the laser 20.

[0059] With such a setting, as long as the adjusting member 60 is rotated counterclockwise or clockwise, the length of the end of the adjusting member 60 extending into the mounting hole 321 can be adjusted to tighten or loosen the laser 20.

[0060] Further, the vane zeroing device 100 further includes a connecting bolt 61 and a wing nut 62. The tail of the connecting bolt 61 sequentially penetrates through one of the first connecting arms 31, the second connecting arm 14, and the other first connecting arm 31, and the wing nut 62 is threadedly connected to the tail of the connecting bolt 61.

[0061] With such a setting, when the wing nut 62 is loosened, the two first connecting arms 31 and the second connecting arm 14 can rotate relative to each other to adjust the relative angle between the laser holder 30 and the support column 10; when the wing nut 62 is tightened, the two first connecting arms 31 and the second connecting arm 14 are relatively fixed, so that the laser holder 30 and the support column 10 are relatively fixed.

[0062] Further, a chamfer structure 15 is provided at the root of the second connecting arm 12. This makes the second connecting arm 12 not easily break.

[0063] Further, the distance between the two first connecting arms 31 is equal to the thickness of the second connecting arm 14 along the first direction F. With such a setting, it is convenient for the two first connecting arms 31 to better clamp the second connecting arm 14.

[0064] In addition, as Figure 4 shown, the number of the linear grooves 51 is two, and the two linear grooves 51 are located on the circumferentially opposite sides of the support column 10 and extend along the axial direction of the support column 10. With such a setting, when the adsorption end 11 of the support column 10 adsorbs on the wheel hub 42, the two linear grooves 51 are on the circumferential two sides of the support column 10. As long as the support column 10 is adsorbed between the two ends of the wheel hub zero position scale line 43, then the two linear grooves 51 can be aligned with the wheel hub zero position scale line 43, and alignment is performed from the two opposite directions of the support column 10, so that the accuracy of aligning the calibration reference 50 on the support column 10 with the wheel hub zero position scale line 43 is higher. When specifically implemented, the extension length of the linear groove 51 along the axial direction of the support column 10 can be set according to actual needs, and the groove depth of the linear groove 51 can be set to be relatively shallow as long as it can be observed by the operator.

[0065] In addition, an installation groove 111 is formed in the end face of the adsorption end 11, and the magnetic attachment 13 is inserted into the installation groove 111, and the end of the magnetic attachment 13 exposes from the notch of the installation groove 111 and is flush with the end face of the adsorption end 11. With such a setting, the exposed part of the end of the magnetic attachment 13 can adsorb with the wheel hub.

[0066] Combined with Figure 1 describe the use process of the blade zero calibration device according to the embodiments of the present application.

[0067] First, install the laser 20 into the installation hole 321 of the laser bracket 30, and reliably lock the laser 20 in the laser bracket 30 by tightening the adjusting member 60.

[0068] Secondly, adsorb the adsorption end 11 at the wheel hub zero position scale line 43 of the wheel hub 42, roughly align the linear groove 51 with the wheel hub zero position scale line 43, and then manually rotate and adjust the laser bracket 30 to adjust the linear groove 51 to be highly coincident with the wheel hub zero position scale line 43. By using the pitch manual operation box, rotate the angle of the blade 40. When the blade zero position scale line 41 is close to and coincides with the wheel hub zero position scale line 43, slowly adjust the rotation angle of the blade 40, and by manually adjusting the rotation angle of the laser bracket 30, make the linear groove 51, the wheel hub zero position scale line 43, and the blade zero position scale line 41 be highly coincident, so as to achieve the purpose of high-precision calibration of the blade zero position, thereby ensuring that the wind turbine generator set can maintain the attitude of obtaining the maximum wind energy and maximizing the wind energy utilization rate.

[0069] Next, examples of the dimensions and materials of each part in the blade zero calibration device 100 are given.

[0070] Support column 10: Its material is ordinary low-carbon steel, with the model of Q235 steel, which has the characteristics of easy processing and light weight. The processing method of the outer surface of the support column 10 is turning. For example, a cylindrical blank with a length of 160 mm and a radius of 30 mm is selected for processing. The required surface roughness of the outer surface is grade 6, specifically Ra3.2. During processing, a groove hole with a radius of 10 mm and a depth of 10 mm is milled at the bottom of the blank as the installation groove 111. The required surface roughness of it is grade 5, specifically Ra1.6, and the flatness is 0.08 mm, for placing the magnetic attachment 13. Then, on this blank, at a position 100 mm from the bottom, a frustum with a length of 60 mm and a depth of 8 mm is cut towards the top. This step is rough machining, and then the frustum is milled to obtain the second connecting arm 14, whose roughness is Ra1.6. After milling, a coarse-threaded M6 screw hole is drilled at a position 8 mm from the top in the middle of the second connecting arm 14. In addition, in a way parallel to the two surfaces of the second connecting arm 14, linear grooves 51 are processed symmetrically on the left and right opposite sides of the support column 10. The processing method is milling, with a width of 3 mm and a milling depth of 3 mm. The milling direction is the axial direction, running through the entire support column 10. It is required that the parallelism between the groove wall 52 of the linear groove 51 and the two surfaces in the first direction F of the second connecting arm 14 is 0.03 mm, and the straightness is 0.05 mm.

[0071] Laser bracket 30: Its material is 5052 aluminum alloy steel, and its forming method is casting, which has the characteristics of easy processing and light weight. The processing process is as follows: A base body with an initial shape of a length of 40 mm, a width of 66 mm, and a height of 25 mm is selected as the blank. On this base body, a through hole is processed at a position with a length of 20 mm and a width of 15 mm as the installation hole 321. The radius of the installation hole 321 is 10 mm, and its internal is ground, with a roughness of Ra1.6. Then, two first connecting arms 31 arranged at intervals along the first direction are processed at the bottom of the base body, and their surfaces need to be milled and ground, with a required roughness of Ra3.2. Two coarse-threaded M6 screw holes extending along the first direction F are drilled on the two first connecting arms 31 for the connecting bolt 61 to pass through. The surfaces of the two first connecting arms 31 facing each other are required to have a roughness of Ra1.6 and a flatness requirement of 0.05 mm. A coarse-threaded M10 screw hole is drilled at the top of the main body 32, and an adjusting part 60 is installed in this coarse-threaded screw hole. The adjusting part 60 uses a knurled socket head screw GB / T834 - 1988. Through the thread pair, the laser 20 is firmly locked on the laser bracket 30.

[0072] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0073] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A blade zeroing device for a wind turbine generator, characterized in that, Comprising: A support column, including an adsorption end and a connection end arranged oppositely, wherein a magnetic adsorption member is provided at the adsorption end, and the magnetic adsorption member is used for magnetic adsorption with the wheel hub; And A laser and a laser bracket, the laser is arranged on the laser bracket, and the laser bracket is rotatably connected to the connection end of the support column around an axis; Wherein, a calibration reference is provided on the surface of the support column, the calibration reference extends along the axial direction of the support column, and the calibration reference and the axis of the laser emitted by the laser are coplanar.

2. The blade zeroing device of a wind turbine according to claim 1, characterized in that, At least one linear groove is provided on the outer wall of the support column, the linear groove includes two groove walls arranged oppositely along a first direction, and the two groove walls extend along the axial direction of the support column; A plane parallel to the two groove walls and equidistant from the two groove walls is defined as a reference plane, and the intersection line of the reference plane and the bottom wall of the linear groove forms the calibration reference, and the axis of the laser emitted by the laser is located in the reference plane.

3. The blade zeroing device of a wind turbine according to claim 2, characterized in that, The laser bracket includes two first connecting arms arranged at intervals along the first direction, a partial shaft section of the support column near the connection end is formed as a second connecting arm, and the two surfaces of the second connecting arm along the first direction are clamped between the two first connecting arms, and the second connecting arm is rotatably connected to the two first connecting arms around the axis; The axis is perpendicular to the groove wall, and the two surfaces of the second connecting arm along the first direction are parallel to the reference plane and equidistant from the reference plane.

4. The blade zeroing device of a wind turbine according to claim 3, characterized in that, The laser bracket further includes a main body portion, and the main body portion is connected to the side of the two first connecting arms facing away from the support column; an installation hole is provided on the main body portion, and the laser is inserted and connected in the installation hole; The axis of the installation hole coincides with the axis of the laser emitted by the laser, and the axis of the installation hole is parallel to the two surfaces of the second connecting arm along the first direction and equidistant from the two surfaces.

5. The blade zeroing device of a wind turbine according to claim 4, characterized in that, The blade zeroing device further includes an adjusting member; The adjusting member is threadedly connected to the main body portion, and the end of the adjusting member extends into the inner side of the installation hole and presses against the laser.

6. The blade zeroing device of a wind turbine according to claim 3, characterized in that, The blade zeroing device further includes a connecting bolt and a wing nut; The tail of the connecting bolt sequentially penetrates through one of the first connecting arms, the second connecting arm, and the other first connecting arm; the wing nut is threadedly connected to the tail of the connecting bolt.

7. The blade zeroing device of a wind turbine according to claim 3, characterized in that, A chamfer structure is provided at the root of the second connecting arm.

8. The blade zeroing device of a wind turbine according to claim 3, characterized in that, The distance between the two first connecting arms is equal to the thickness of the second connecting arm along the first direction.

9. The blade zeroing device for a wind turbine according to claim 2, characterized in that, The number of the linear grooves is two, and the two linear grooves are located on the circumferentially opposite sides of the support column and extend along the axial direction of the support column.

10. The blade zeroing device of a wind turbine according to any one of claims 1-9, characterized in that, An installation groove is provided on the end face of the adsorption end, the magnetic adsorption member is inserted into the installation groove, and the end of the magnetic adsorption member exposes from the notch of the installation groove and is flush with the end face of the adsorption end.

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