Wind vane calibration device of wind generating set and calibration method of wind vane calibration device

Abstract

The invention discloses a wind generating set wind indicator calibration device and a calibration method thereof.The wind generating set wind indicator calibration device comprises an enclasping piece, a support, a rotating piece, range finders and a positioning piece, the enclasping piece is installed at the lower end of the support and used for being fixedly installed on a fixing column, the rotating piece is installed at the upper end of the support, and the two range finders are installed on the rotating piece; the two range finders form an angle with each other and are symmetrically arranged with the central axis, the positioning piece is arranged on the rotating piece and above the holding piece, and the positioning piece is used for being connected with the lower end of the wind indicator for supporting; the wind indicator further comprises a correction structure used for correcting the wind indicator, a reference mark is arranged on the wind indicator, and the correction structure positions the circumferential position of the wind indicator through the reference mark. According to the invention, the wind indicator can be calibrated conveniently and quickly under the condition that the center line of the cabin is not calibrated.

Description

Technical Field

[0001] The invention relates to the technical field of wind generator set installation, and in particular to a wind generator set wind vane calibration device and a calibration method thereof. Background Art

[0002] The problem of wind vane deviation in relation to the wind is a common phenomenon in the wind power industry. The traditional installation method is limited to the personnel's intuitive feeling to make the direction of the wind vane zero scale relatively parallel to the direction of the head of the wind turbine. Due to the difference in each person's senses, the correction error causes the direction of the wind vane head to deviate, resulting in the unit not being able to face the wind accurately and yaw deviation, which reduces the wind energy captured by the unit and affects the power generation of the wind turbine. The economic benefits of the wind farm are greatly affected.

[0003] At present, some technicians have proposed solutions. For example, Chinese patent document CN108303005B, published (announcement) date: 2023.07.21, discloses a wind turbine wind vane installation zero error detection and calibration device, the detection and calibration device includes a switch, an aluminum alloy shell, a zero position pointer, a dial, a scale pointer, a horizontal knob, a vertical knob, a pressure plate, a battery, a laser generator, a total reflection prism, and a base plate; the switch, the dial, and the base plate are fixedly mounted on the aluminum alloy shell; the zero position pointer can slide on the aluminum alloy shell along the pointer direction; the scale pointer is fixedly mounted on the horizontal knob; the horizontal knob can rotate horizontally around the axis of the dial; the vertical knob is installed on the horizontal knob at the same height as the laser generator, and can rotate vertically relative to the horizontal knob; the total reflection prism is fixed on the vertical knob. Its features are: accurate detection, which can realize accurate wind alignment of wind turbines and improve the power generation efficiency of wind turbines; its disadvantages are: first, the center line of the cabin is a theoretical line. In actual operation, there is an anemometer on one side of the wind vane, and the wind vane is not in the middle of the top of the cabin, so the center line of the cabin is not easy to get accurately; second, through the inaccurate center line of the cabin, the acquisition of its reference point also has a large error. Therefore, the device is cumbersome and inconvenient to use in actual use.

[0004] In addition, Chinese patent document CN213016640U, publication (announcement) date: 2021.04.20, discloses a wind vane device for a wind turbine. Although a laser rangefinder is disclosed, it is also necessary to find the center line of the nose so that the laser line coincides with a parallel line of the center line of the nose. Since the center line of the nose is not easy to calibrate, it is not convenient to use. Summary of the invention

[0005] In order to solve the current technical problems, the main purpose of the present invention is to provide a wind vane calibration device and a calibration method for a wind turbine generator set, which can conveniently and quickly calibrate the wind vane without calibrating the center line of the nacelle.

[0006] In order to overcome the problems existing in the prior art, the technical solution adopted by the present invention is: a wind vane calibration device for a wind turbine generator set, comprising a clamping member, a bracket, a rotating member, a distance meter and a positioning member, wherein a clamping member is installed at the lower end of the bracket, and the clamping member is used to be fixedly installed on a fixed column, and a rotating member is installed at the upper end of the bracket, and two distance meters are installed on the rotating member, and the two distance meters are installed at an angle to each other and symmetrically with the central axis, and the positioning member is installed on the rotating member above the clamping member, and the positioning member is used to connect and support the lower end of the wind vane; and also includes a correction structure for calibrating the wind vane, and a reference mark is provided on the wind vane, and the correction structure positions the circumferential position of the wind vane through the reference mark.

[0007] The rotating member is a box structure, the lower side of the box structure is rotatably connected to the support shaft of the bracket through a bearing, the rangefinder is installed on one side of the box structure, and the box structure is provided with a window at a position corresponding to the rangefinder.

[0008] The rotating member is rotated by the driving assembly. A controller is also installed in the box structure. The controller is electrically connected to the rangefinder and the driving assembly. The controller is powered by a built-in battery or an external power supply.

[0009] The driving assembly includes a worm wheel, a first worm and a first motor. The driving assembly is located in a box structure. The upper end of the support shaft extends into the box structure. The worm wheel is fixedly mounted on the support shaft. Both ends of the first worm are connected to the box structure through bearing seats respectively. The output shaft of the first motor is transmission-connected to one end of the first worm.

[0010] The positioning member is a ring structure, the lower end of the wind vane is inserted into the ring structure, and the lower end of the wind vane is loosely matched with the ring structure; the correction structure is a reference mark line set on the positioning member, and the reference mark line and the central axis are located in the same vertical plane.

[0011] The correction structure includes a laser sensor, which has a support installed on the rotating part, and the laser sensor is installed on the support. The laser beam of the laser sensor is located in the same vertical plane as the central axis; the reference mark is a reflective mark arranged longitudinally; the laser sensors are electrically connected to the controller respectively.

[0012] The positioning member is a ring structure, the lower end ring structure of the weather vane is connected to the limiter, the positioning member is connected to the rotating member through a connecting member, the outer wall of the positioning member is a worm gear tooth structure, the upper and lower end faces of the positioning member are respectively provided with arc grooves, the connecting member is a groove structure, and the ends of the groove walls on both sides of the connecting member are respectively provided with arc parts extending inwards, the arc parts on the upper and lower sides are respectively slidably clamped in the arc grooves of the upper and lower end faces of the positioning member, a second worm is installed in the connecting member, a second motor is installed on one side of the connecting member, and the output shaft of the second motor is transmission-connected to the second worm; the second motor is electrically connected to the controller.

[0013] The positioning member includes a first half ring and a second half ring, the first half ring is connected to the rotating member, the second half ring is installed on the first half ring by screws, the upper and lower end faces of the first half ring are respectively provided with arc grooves, and the arc parts on the upper and lower sides of the connecting member are respectively slidably clamped in the arc grooves of the upper and lower end faces of the first half ring.

[0014] An adjustment seat is installed on the rotating member, the adjustment seat is coaxial with the supporting shaft, a transverse hole is provided on the adjustment seat, an extension rod is fixedly connected to the positioning member, the extension rod passes through the transverse hole of the adjustment seat, a limiting bolt is screwed on the adjustment seat, and the limiting bolt abuts against the extension rod to limit the extension rod.

[0015] A method for calibrating a wind vane of a wind turbine generator set, using the wind vane calibration device of the wind turbine generator set, the calibration method comprising the following steps: S1. Install a fixing column on the top of the nacelle of the wind turbine, and install the calibration device on the fixing column through the clamping parts. During installation, align the calibration device with the step surface of the nacelle, and then put the connecting sleeve on the fixing column; S2. Install the lower end of the weather vane onto the positioning piece; S3, start the controller, the light beams of the two rangefinders are respectively irradiated on the step surface, the controller reads the distance values ​​detected by the two rangefinders in real time, and controls the first motor to start, so that the rotating member swings left and right. If the distance values ​​detected by the two rangefinders are one large and one small, the rotating member swings to the side of the rangefinder with the smaller value, until the distance values ​​detected by the two rangefinders are within the set range, the controller controls the first motor to stop; S4. After that, the controller controls the second motor and the laser sensor to start. The positioning member rotates left and right under the drive of the second motor, thereby driving the wind vane to rotate left and right. The laser sensor detects the position of the reference mark on the wind vane in real time according to the amount of laser reflection received. When the reference mark is aligned with the laser sensor, the amount of laser received on the laser sensor reaches the set value. At this time, the controller controls the second motor to stop.

[0016] S5. Move the connecting sleeve upwards and cover the lower ends of the fixing column and the weather vane at the same time. First, connect and fix the connecting sleeve to the fixing column with bolts, and then connect and fix the lower end of the weather vane to the connecting sleeve with bolts. Among them, two layers of bolts are installed on the upper side of the connecting sleeve to connect with the lower end of the weather vane. When installing the bolts on the upper side of the connecting sleeve, first symmetrically tighten the bolts by hand to abut against the lower end of the weather vane, and then symmetrically tighten them with tools in multiple times.

[0017] The present invention has the following beneficial effects: 1. The distance meter of the present invention is used to measure the distance to the step surface of the cabin. By swinging the rotating part left and right, when the distance values ​​displayed by the two distance meters are consistent, it means that the central axis is perpendicular to the step surface, and the central axis is parallel to the center line of the cabin. The wind vane has a reference mark, and the wind vane is adjusted by rotating so that the reference mark is aligned with the correction structure, thereby calibrating the wind vane. The present invention can calibrate the wind vane conveniently and quickly without calibrating the center line of the cabin.

[0018] 2. The present invention provides a driving assembly, and the rotating member can rotate under the drive of the driving assembly, and automatic alignment is achieved through the cooperation of the controller and the rangefinder.

[0019] 3. The correction structure of the present invention includes a laser sensor. The positioning member rotates left and right under the drive of the second motor, thereby driving the wind vane to rotate left and right. The laser sensor detects the position of the reference mark on the wind vane in real time based on the amount of laser reflection received. When the reference mark is aligned with the laser sensor, the amount of laser received on the laser sensor reaches a set value. At this time, the controller controls the second motor to stop, thereby realizing automatic alignment of the reference mark. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a usage state diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention in use.

[0023] Figure 3 for Figure 1 Schematic diagram of the AA section structure.

[0024] Figure 4 for Figure 1 Schematic diagram of the BB cross-section structure.

[0025] Figure 5 for Figure 4 Schematic diagram of the CC cross-section structure.

[0026] Figure 6 This is a schematic diagram of the status when the wind vane calibration is completed.

[0027] Figure 7 The diagram is a top view of the present invention when calibrating a wind vane.

[0028] Figure 8 This is a schematic diagram of the state detected by the laser sensor of the present invention.

[0029] Reference numerals: Fixed column 1, wind vane 2, connecting sleeve 3, reference mark 4, step surface 5; A clamping member 10, a first clamping ring 11, and a second clamping ring 12; Bracket 20, support shaft 21; Rotating member 30, distance meter 31, laser beam 311, central axis 312, window 32, bearing 33; Extension rod 40, connecting member 41, arc portion 411, second worm 42, second motor 43; Positioning member 50, first half ring 51, worm gear tooth structure 511, arc groove 512, second half ring 52, screw 53; Laser sensor 60, support 61; Driving assembly 70, worm gear 71, first worm 72, first motor 73, bearing seat 74; Adjusting seat 80, transverse hole 81, limiting bolt 82; Controller 90, battery 100. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1: See also Figure 1-6The present invention provides a wind vane calibration device for a wind turbine generator set, comprising a clamping member 10, a bracket 20, a rotating member 30, a distance meter 31 and a positioning member 50. The clamping member 10 is installed at the lower end of the bracket 20, and the clamping member 10 is used to be fixedly installed on the fixed column 1. The rotating member 30 is installed at the upper end of the bracket 20. Two distance meters 31 are installed on the rotating member 30. The two distance meters 31 are installed at an angle to each other and symmetrically with the central axis 312. The positioning member 50 is installed on the rotating member 30 above the clamping member 10. The positioning member 50 is used to connect and support the lower end of the wind vane 2; it also includes a correction structure for calibrating the wind vane 2. The wind vane 2 is provided with a reference mark 4, and the correction structure locates the circumferential position of the wind vane 2 through the reference mark 4.

[0032] See also Figure 7 The distance meter 31 is used to measure the distance to the step surface 5 of the cabin. By swinging the rotating member 30 left and right, when the distance values ​​displayed by the two distance meters 31 are consistent, it means that the central axis 312 is perpendicular to the step surface 5. At this time, the central axis 312 is parallel to the center line of the cabin. The wind vane 2 has a reference mark 4. By rotating and adjusting the wind vane 2, the reference mark 4 is aligned with the correction structure, so that the wind vane 2 is calibrated. The present invention can calibrate the wind vane conveniently and quickly without calibrating the center line of the cabin.

[0033] In this embodiment, see Figure 2 The rotating member 30 is a box structure, the lower side of the box structure is rotatably connected to the support shaft 21 of the bracket 20 through a bearing 33, the rangefinder 31 is installed on one side of the box structure, and the box structure is provided with a window 32 at a position corresponding to the rangefinder 31.

[0034] In this embodiment, the rangefinder 31 is a laser rangefinder or an infrared rangefinder.

[0035] In this embodiment, see Figure 3 The clamping member 10 adopts a clamping hoop structure, and the clamping member 10 includes a first clamping ring 11 and a second clamping ring 12. The first clamping ring 11 is welded and fixed to the bracket 20, and the second clamping ring 12 is installed on the first clamping ring 11 by bolts.

[0036] The center of the holding member 10 is coaxial with the center of the positioning member 50. The axes of the holding member 10 and the positioning member 50 and the central axis 312 are in the same vertical plane.

[0037] Embodiment 2: On the basis of Example 1, the rotating member 30 is rotated by the driving assembly 70, and a controller 90 is also installed in the box structure. The controller 90 is electrically connected to the rangefinder 31 and the driving assembly 70, and the controller 90 is powered by a built-in battery 100 or an external power supply. By providing the driving assembly 70, the rotating member 30 can be driven by the driving assembly 70 to rotate, and the automatic alignment is achieved through the cooperation of the controller 90 and the rangefinder 31.

[0038] In this embodiment, see Figure 2 , 3 The driving assembly 70 includes a worm wheel 71, a first worm 72 and a first motor 73. The driving assembly 70 is located in the box structure. The upper end of the support shaft 21 extends into the box structure. The worm wheel 71 is mounted on the support shaft 21. Both ends of the first worm 72 are connected to the box structure through bearing seats 74. The output shaft of the first motor 73 is connected to one end of the first worm 72. The first motor 73 drives the first worm 72 to rotate. Since the worm wheel 71 is fixedly mounted on the support shaft 21, the rotating member 30 rotates.

[0039] Embodiment 3: In this embodiment, the wind vane 2 is manually rotated so that the reference mark 4 is aligned with the correction structure.

[0040] Specifically, the positioning member 50 is a ring structure, and the lower end of the wind vane 2 is inserted into the ring structure. The lower end of the wind vane 2 is gap-matched with the ring structure, that is, the inner diameter of the ring structure is slightly larger than the diameter of the lower end of the wind vane 2. In this way, the wind vane 2 can rotate while ensuring its stability.

[0041] The correction structure is a reference mark line arranged on the positioning member 50 , and the reference mark line and the central axis 312 are located in the same vertical plane.

[0042] After the central axis 312 is perpendicular to the step surface 5, the wind vane 2 is manually rotated to align the reference mark 4 with the reference mark line, and the wind vane 2 is calibrated.

[0043] Embodiment 4: Different from Example 3, in this example, see Figure 1 , 2The calibration structure includes a laser sensor 60, which has a support 61 mounted on the rotating member 30, and the laser sensor 60 is mounted on the support 61. The laser beam of the laser sensor 60 and the central axis 312 are located in the same vertical plane; the reference mark 4 is a reflective mark arranged longitudinally; and the laser sensor 60 is electrically connected to the controller 90. When the wind vane 2 is manually rotated and the reference mark 4 is aligned with the laser sensor 60, the amount of laser received by the laser sensor 60 reaches the set value, and the controller 90 issues a sound alarm, so that the wind vane 2 can also be calibrated.

[0044] It should be noted that the axes of the holding member 10 and the positioning member 50, as well as the laser beam of the laser sensor 60, are on the same vertical plane as the central axis 312. The vertical plane is a plane perpendicular to the horizontal plane.

[0045] In this embodiment, the laser sensor 60 is a laser photoelectric sensor with laser emitting and receiving functions.

[0046] Embodiment 5: Based on Example 4, automatic alignment of the reference mark 4 is achieved.

[0047] For details, see Figure 2 , 4 5. The positioning member 50 is a ring structure. The lower end ring structure of the weather vane 2 is connected to the limiter. The positioning member 50 is connected to the rotating member 30 through the connecting member 41. The outer wall of the positioning member 50 is a worm gear structure 511. The upper and lower end faces of the positioning member 50 are respectively provided with arc grooves 512. The connecting member 41 is a groove structure. The ends of the groove walls on both sides of the connecting member 41 are respectively provided with arc portions 411 extending inwardly. The arc portions 411 on the upper and lower sides are respectively slidably mounted in the arc grooves 512 on the upper and lower end faces of the positioning member 50. A second worm 42 is installed in the connecting member 41. A second motor 43 is installed on one side of the connecting member 41. The output shaft of the second motor 43 is transmission-connected to the second worm 42; the second motor 43 is electrically connected to the controller 90.

[0048] The positioning member 50 rotates left and right under the drive of the second motor 43, thereby driving the wind vane 2 to rotate left and right. The laser sensor 60 detects the position of the reference mark 4 on the wind vane 2 in real time based on the amount of laser reflection received. When the reference mark 4 is aligned with the laser sensor 60, the amount of laser received on the laser sensor 60 reaches a set value. At this time, the controller 90 controls the second motor 43 to stop, thereby realizing automatic alignment of the reference mark 4.

[0049] In this embodiment, see Figure 4The positioning member 50 includes a first half ring 51 and a second half ring 52. The first half ring 51 is connected to the rotating member 30. The second half ring 52 is mounted on the first half ring 51 by means of screws 53. The upper and lower end faces of the first half ring 51 are respectively provided with arc grooves 512. The arc portions 411 on the upper and lower sides of the connecting member 41 are respectively slidably mounted in the arc grooves 512 on the upper and lower end faces of the first half ring 51. With the above structure, the wind vane 2 can be held and fixed while ensuring that the positioning member 50 can rotate.

[0050] Embodiment 6: See also Figure 1 , 2 5. An adjustment seat 80 is installed on the rotating member 30. The adjustment seat 80 is coaxial with the support shaft 21. A transverse hole 81 is provided on the adjustment seat 80. An extension rod 40 is fixedly connected to the positioning member 50. The extension rod 40 passes through the transverse hole 81 of the adjustment seat 80. A limit bolt 82 is screwed on the adjustment seat 80. The limit bolt 82 abuts against the extension rod 40 to limit the extension rod 40. By providing the adjustment seat 80 and the extension rod 40, it is convenient to replace the positioning member 50 and adjust the extension length of the positioning member 50 as needed. In order to prevent the extension rod 40 from rotating, the cross section of the extension rod 40 is rectangular.

[0051] Embodiment 6: Based on Example 5, see Figure 1 , 7 8. A method for calibrating a wind vane of a wind turbine generator set, using the wind vane calibration device of the wind turbine generator set, the calibration method comprising the following steps: S1. See Figure 1 , install a fixing column 1 on the top of the nacelle of the wind turbine, and install the calibration device on the fixing column 1 through the clamping member 10. During installation, initially align the calibration device with the step surface 5 of the nacelle, and then put the connecting sleeve 3 on the fixing column 1.

[0052] S2. Install the lower end of the wind vane 2 onto the positioning member 50.

[0053] S3, start the controller 90, and the light beams of the two rangefinders 31 are respectively irradiated on the step surface 5, see Figure 7 The controller 90 reads the distance values ​​detected by the two distance meters 31 in real time, and controls the first motor 73 to start, so that the rotating member 30 swings left and right. If the distance values ​​detected by the two distance meters 31 are one large and one small, the rotating member 30 swings to the side of the distance meter 31 with the smaller value, until the distance values ​​detected by the two distance meters 31 are within the set range. Figure 7 As shown, the controller 90 controls the first motor 73 to stop; at this time, the laser beams of the two rangefinders 31 form an isosceles triangle with the step surface 5. At this time, the central axis 312 is perpendicular to the step surface 5, and the central axis 312 is parallel to the center line of the cabin.

[0054] S4. After that, the controller 90 controls the second motor 43 and the laser sensor 60 to start, and the positioning member 50 rotates left and right under the drive of the second motor 43, thereby driving the wind vane 2 to rotate left and right. Figure 8 The laser sensor 60 detects the position of the reference mark 4 on the wind vane 2 in real time according to the amount of laser reflection received. When the reference mark 4 is aligned with the laser sensor 60, the amount of laser received on the laser sensor 60 reaches a set value. At this time, the controller 90 controls the second motor 43 to stop.

[0055] S5, move the connecting sleeve 3 upwards, and cover the lower ends of the fixing column 1 and the wind vane 2 at the same time, first connect and fix the connecting sleeve 3 to the fixing column 1 by bolts, and then connect and fix the lower end of the wind vane 2 to the connecting sleeve 3 by bolts, as shown in FIG. Figure 6 As shown. Two layers of bolts are installed on the upper side of the connecting sleeve 3 and connected with the lower end of the wind vane 2. When installing the bolts on the upper side of the connecting sleeve 3, first symmetrically twist the bolts by hand to abut against the lower end of the wind vane 2, and then symmetrically tighten them with tools in multiple times. Specifically, the inner diameter of the connecting sleeve 3 is larger than the diameter of the lower end of the wind vane 2, so that the wind vane 2 has a margin for position adjustment.

Claims

1. A wind vane calibration device for a wind turbine generator set, characterized in that: The invention comprises a clamping member (10), a bracket (20), a rotating member (30), a distance meter (31) and a positioning member (50), wherein the lower end of the bracket (20) is provided with the clamping member (10), the clamping member (10) being used for being fixedly mounted on a fixed column (1), the upper end of the bracket (20) is provided with a rotating member (30), two distance meters (31) being mounted on the rotating member (30), the two distance meters (31) being arranged at an angle to each other and being symmetrically mounted with respect to a central axis (312), the positioning member (50) being mounted on the rotating member (30) above the clamping member (10), the positioning member (50) being used for being connected to and supported by the lower end of a wind vane (2); and a correction structure for calibrating the wind vane (2), the wind vane (2) being provided with a reference mark (4), the correction structure positioning the circumferential position of the wind vane (2) by means of the reference mark (4).

2. A wind vane calibration device for a wind turbine generator set according to claim 1, characterized in that: The rotating member (30) is a box structure, the lower side of the box structure is rotatably connected to the support shaft (21) of the bracket (20) via a bearing (33), the rangefinder (31) is mounted on one side of the box structure, and the box structure is provided with a window (32) at a position corresponding to the rangefinder (31).

3. A wind vane calibration device for a wind turbine generator set according to claim 2, characterized in that: The rotating member (30) is rotated by the driving assembly (70), and a controller (90) is also installed in the box structure. The controller (90) is electrically connected to the rangefinder (31) and the driving assembly (70), and the controller (90) is powered by a built-in storage battery (100) or an external power supply.

4. A wind vane calibration device for a wind turbine generator set according to claim 3, characterized in that: The driving assembly (70) comprises a worm wheel (71), a first worm (72) and a first motor (73). The driving assembly (70) is located in a box structure. The upper end of the support shaft (21) extends into the box structure. The worm wheel (71) is fixedly mounted on the support shaft (21). Both ends of the first worm (72) are connected to the box structure via bearing seats (74) respectively. The output shaft of the first motor (73) is drivingly connected to one end of the first worm (72).

5. A wind vane calibration device for a wind turbine generator set according to claim 1, characterized in that: The positioning member (50) is a ring structure, the lower end of the wind vane (2) is inserted into the ring structure, and the lower end of the wind vane (2) is loosely matched with the ring structure; the correction structure is a reference mark line arranged on the positioning member (50), and the reference mark line and the central axis (312) are located in the same vertical plane.

6. A wind vane calibration device for a wind turbine generator set according to claim 3, characterized in that: The calibration structure comprises a laser sensor (60), the laser sensor (60) having a support (61) mounted on the rotating member (30), the laser sensor (60) being mounted on the support (61), the laser beam of the laser sensor (60) and the central axis (312) being located on the same vertical plane; the reference mark (4) being a reflective mark arranged longitudinally; and the laser sensor (60) being electrically connected to a controller (90).

7. A wind vane calibration device for a wind turbine generator set according to claim 6, characterized in that: The positioning member (50) is a ring structure. The lower end ring structure of the weather vane (2) is connected to the limiter. The positioning member (50) is connected to the rotating member (30) through the connecting member (41). The outer wall of the positioning member (50) is a worm gear structure (511). The upper and lower end surfaces of the positioning member (50) are respectively provided with arc grooves (512). The connecting member (41) is a groove structure. The ends of the groove walls on both sides of the connecting member (41) are respectively provided with arc portions (411) extending inward. The arc portions (411) on the upper and lower sides are respectively slidably mounted in the arc grooves (512) on the upper and lower end surfaces of the positioning member (50). A second worm (42) is installed in the connecting member (41). A second motor (43) is installed on one side of the connecting member (41). The output shaft of the second motor (43) is drivingly connected to the second worm (42). The second motor (43) is electrically connected to the controller (90).

8. A wind vane calibration device for a wind turbine generator set according to claim 7, characterized in that: The positioning member (50) comprises a first half ring (51) and a second half ring (52); the first half ring (51) is connected to the rotating member (30); the second half ring (52) is mounted on the first half ring (51) via a screw (53); upper and lower end surfaces of the first half ring (51) are respectively provided with arc grooves (512); and arc portions (411) on upper and lower sides of the connecting member (41) are respectively slidably mounted in the arc grooves (512) on the upper and lower end surfaces of the first half ring (51).

9. A wind vane calibration device for a wind turbine generator set according to claim 1, characterized in that: An adjusting seat (80) is mounted on the rotating member (30), the adjusting seat (80) is coaxial with the supporting shaft (21), a transverse hole (81) is provided on the adjusting seat (80), an extension rod (40) is fixedly connected to the positioning member (50), the extension rod (40) passes through the transverse hole (81) of the adjusting seat (80), a limiting bolt (82) is screwed on the adjusting seat (80), and the limiting bolt (82) abuts against the extension rod (40) to limit the extension rod (40).

10. A method for calibrating a wind vane of a wind turbine generator set, characterized in that: A wind vane calibration device for a wind turbine generator set as claimed in claim 7 is adopted, and the calibration method comprises the following steps: S1. Install a fixing column (1) on the top of the nacelle of the wind turbine generator, and install the calibration device on the fixing column (1) through a clamping member (10). During installation, the calibration device is initially aligned with the step surface (5) of the nacelle, and then the connecting sleeve (3) is mounted on the fixing column (1); S2, installing the lower end of the weather vane (2) onto the positioning member (50); S3, starting the controller (90), the light beams of the two rangefinders (31) are respectively irradiated on the step surface (5), the controller (90) reads the distance values ​​detected by the two rangefinders (31) in real time, and controls the first motor (73) to start, so that the rotating member (30) swings left and right. If the distance values ​​detected by the two rangefinders (31) are one large and one small, the rotating member (30) swings toward the side of the rangefinder (31) with the smaller value, until the distance values ​​detected by the two rangefinders (31) are within a set range, and the controller (90) controls the first motor (73) to stop; S4. Afterwards, the controller (90) controls the second motor (43) and the laser sensor (60) to start, and the positioning member (50) rotates left and right under the drive of the second motor (43), thereby driving the wind vane (2) to rotate left and right. The laser sensor (60) detects the position of the reference mark (4) on the wind vane (2) in real time according to the amount of laser reflection received. When the reference mark (4) is aligned with the laser sensor (60), the amount of laser received on the laser sensor (60) reaches a set value. At this time, the controller (90) controls the second motor (43) to stop. S5. Move the connecting sleeve (3) upward and cover the lower ends of the fixing column (1) and the weather vane (2) at the same time. First, connect and fix the connecting sleeve (3) to the fixing column (1) by bolts, and then connect and fix the lower end of the weather vane (2) to the connecting sleeve (3) by bolts.

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