Monitoring system of wind generating set

Abstract

The invention relates to the technical field of wind generating sets, and discloses a wind generating set monitoring system which comprises a movable plate and a driving part for driving the movable plate to move, and the driving part enables the movable plate to be close to and away from a nut of the wind generating set. The rotating bodies are rotationally mounted on the movable plate, and notches corresponding to the nuts and allowing the nuts to enter are formed in the rotating bodies; the positioning structures limit rotation of the rotating body; the pressure sensor is used for detecting the pressure between the driving piece and the movable plate; the driving piece enables the movable plate to move towards the nut, and when the pressure exceeds a set value, the driving piece enables the movable plate to be away from the nut; the movable plate is provided with the notch part partially or completely corresponding to the nut, the movable plate approaches the nut, the notch part of the movable plate can move to the outer side of the nut when the nut is not loosened, the movable plate is blocked when the nut is loosened, and whether the nut is loosened or not can be judged; manual inspection is reduced; and the notch part is located on the rotatable rotating body and can adapt to different angle states of the nut.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine generator sets, and in particular to a wind turbine generator set monitoring system. Background Art

[0002] There are many tower bolts and blade root bolts in a wind turbine and they are evenly distributed around the circumference. When the wind turbine is in operation, the blades rotate and the bolts need to bear static and dynamic loads. During operation, loose nuts or even falling bolts may cause the bolt connection to fail.

[0003] The transmission method is to draw corresponding lines on the nut and the bolt head, and manually check whether the line on the nut is misaligned regularly to determine whether it is loose, and reinforce the loose nut. This method requires a lot of manpower, and it is inconvenient to manually check the nuts at a high position.

[0004] In the prior art, the invention patent with publication number CN110388951B discloses a device and method for monitoring bolt loosening of wind turbine generator sets. It monitors whether the bolts are loose by laser reflection and reception. However, this technology can only be used for flange bolt structures inside the cylinder. When the flange and bolts are outside the cylinder, they cannot be used due to the obstruction of the tower or blade root. In addition, the tower has structures such as cables and ladders. This technology allows the cables and ladders to be set only in the center of the tower. In the prior art, the invention patent with publication number CN114278515A discloses a remote monitoring system for wind power generation based on the Internet of Things. This technology has the same problems as the former and requires bolts with clips. The bolts used are non-standard parts, which are inconvenient to use. The clips affect the use of the bolts.

[0005] In the prior art, the invention patented method and system for monitoring the status of variable pitch bearings and connecting bolts of wind turbines with publication number CN116591907B uses laser to monitor the looseness of each bolt. However, the number of bolts at the blade root of a wind turbine tower is huge, with up to hundreds of bolts in a circle, so this method is relatively costly.

[0006] In addition, the installation of bolts requires a certain torque, which results in that after the bolts are installed, the rotation angles of the bolt heads and nuts at different positions are not consistent. That is, after the construction is completed, it is impossible for workers to make one corner of all the nuts face the rotation center or one side of all the nuts face the rotation center, which creates certain difficulties in the installation of the bolt monitoring system in the above-mentioned prior art. Summary of the invention

[0007] The purpose of the present invention is to provide a wind turbine generator monitoring system in order to solve the above-mentioned problems in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solutions: A wind turbine generator monitoring system, comprising: A movable plate and a driving member for driving the movable plate to move, wherein the driving member causes the movable plate to move toward and away from a nut of the wind turbine generator set; A plurality of rotating bodies corresponding to the nuts one by one, the rotating bodies are rotatably mounted on the movable plate, and the rotating bodies are provided with notches corresponding to the nuts for the nuts to enter; A plurality of positioning structures, each of which corresponds to a rotating body and restricts the rotation of the corresponding rotating body; A guide structure, providing a linear guide for the movement of the movable plate; The pressure sensor detects the pressure between the driving member and the movable plate; the driving member moves the movable plate toward the nut, and when the pressure exceeds the set value, the driving member moves the movable plate away from the nut.

[0009] Furthermore, it also includes a distance meter; the distance meter measures the maximum distance that the movable plate moves toward the nut; if the distance reaches a set value, it is determined that the nut is not loose; if the distance is less than the set value and one times the thickness of the nut, it is determined that the nut is loose.

[0010] Furthermore, the movable plate is annular in shape and surrounds the tower of the wind turbine generator set; the guide structure includes a plurality of guide rails axially arranged on the outside of the tower, and a slide groove cooperating with the guide rail is provided on the inner ring side of the movable plate.

[0011] Furthermore, the edge of the movable plate is provided with a plurality of arc grooves, the movable plate inside the arc groove is provided with an arc hole corresponding to the arc groove, and an arc notch is provided between the arc hole and the groove surface of the arc groove; the rotating body includes a rotating plate, the rotating plate passes through the arc notch, and the edge of the rotating plate is provided with a sliding body that slides with the arc hole.

[0012] Furthermore, the positioning structure includes a slider and a gantry; a guide groove is provided on the movable plate for slidingly cooperating with the slider, and the guide groove is connected with the arc hole; slots are evenly arranged on the outer ring side of the slider, and an insertion strip is provided on the lower side of the slider for cooperating with the slots; the gantry is connected to the movable plate, and a spring is provided between the gantry and the slider, and the spring enables the slider to enter the guide groove and the insertion strip to be inserted into the slot; a traction body is connected to the outer side of the slider.

[0013] Preferably, the rotating body is circular in shape, the rotating plate is circular plate-shaped, the sliding body is annular in shape, and the notch is arranged at the center of the rotating plate, and the notch is a hexagonal through hole for the nut to enter.

[0014] Preferably, the rotating body is semicircular in shape, the rotating plate is semicircular in shape, the sliding body is semicircular in shape, and the notch is arranged in the middle of the straight edge of the rotating plate, the notch corresponds to the nut part and allows the nut part to enter.

[0015] Preferably, the missing portion corresponds to half of the nut, and the missing portion has four surfaces corresponding to four adjacent side surfaces of the nut.

[0016] Preferably, the missing portion corresponds to half of the nut, and the missing portion has three surfaces corresponding to three adjacent side surfaces of the nut.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The movable plate of the present invention has a notch corresponding to part or all of the nut, and the notch can half or fully surround the nut. When the loosening angle of the nut changes, the nut will block the linear movement of the rotating body and the movable plate, so that the moving range of the movable plate becomes one time smaller than the thickness of the nut. The movable plate approaches the nut, and the notch of the movable plate can move to the outside of the nut when the nut is not loose. When the nut is loose, the movable plate is blocked, so that it can be judged whether the nut is loose. Manual inspection is reduced. The notch is located on the rotatable rotating body, which can easily adapt to different angle states of the nut after installation and tightening. The present invention prevents the movable plate from applying excessive force when driven by the driving member by setting a pressure sensor, thereby reducing damage to the rotating body structure. The present invention measures the moving distance of the movable plate by means of a distance meter, and can judge whether a nut is loose by the change in the moving distance of the movable plate, thereby facilitating remote monitoring; implementing targeted on-site inspections and reducing labor costs; The present invention provides a positioning structure, which can ensure that the rotating body does not rotate out of position during use and ensure that the missing part of the rotating body can match and correspond with the nut that has not been loosened. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1.

[0019] Figure 2 This is a side view structural schematic diagram of Example 1.

[0020] Figure 3 This is a schematic diagram of the top view of the structure of Example 1.

[0021] Figure 4 for Figure 1 A partial enlarged schematic diagram.

[0022] Figure 5 This is a schematic diagram of the movable plate structure of Example 1.

[0023] Figure 6 This is a schematic diagram of the connection structure between the rotating body and the movable plate of Example 1.

[0024] Figure 7 This is a schematic diagram of the rotating body structure of Example 1.

[0025] Figure 8 This is a schematic diagram of the first viewing angle structure of the positioning structure of Example 1.

[0026] Fig. 9 This is a schematic structural diagram of the positioning structure of Example 1 from a second viewing angle.

[0027] Fig.10 This is a schematic diagram of the moving range of the movable plate in Example 1.

[0028] Fig.11 Schematic diagram of the connection structure between the rotating body and the movable plate of Example 2 Fig.12 This is a schematic diagram of the rotating body structure of Example 2.

[0029] Fig.13 Schematic diagram of the connection structure between the rotating body and the movable plate of Example 3 Fig.14 This is a schematic diagram of the rotating body structure of Example 3.

[0030] In the figure: 1, movable plate; 2, rotating body; 3, positioning structure; 4, missing part; 5, driving member; 6, pressure sensor; 7, guide rail; 8, distance meter; 9, arc groove; 10, arc hole; 11, arc notch; 12, guide groove; 13, slideway; 14, tower; 15, flange; 16, bolt; 17, nut; 21. rotating plate; 22. sliding body; 23. slot; 31. Slider; 32. Insert; 33. Limit block; 34. Door frame; 35. Spring; 36. Connector; 37. Traction ring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Specific embodiment 1 of the wind turbine generator monitoring system provided by the present invention: See also Figure 1-10 The wind turbine generator set monitoring system is used to monitor whether the bolts 16 uniformly distributed around a certain position of the wind turbine generator set are loose; it includes a movable plate 1 and a driving member 5 for driving the movable plate 1 to move, a plurality of rotating bodies 2 corresponding to the nuts 17 one by one, a plurality of positioning structures 3, a guide structure, a pressure sensor 6 and a distance meter 8.

[0035] In this embodiment, the monitoring system is described in detail by taking the outer bolt 16 of the wind turbine tower 14 as an example. The movable plate 1 is in the shape of a ring and surrounds the tower 14 of the wind turbine. The driving member 5 adopts an electric telescopic rod, and four electric telescopic rods are arranged. Four electric telescopic rod mounting seats are evenly arranged on the outer circumference of the tower 14. The electric telescopic rod is installed on the lower side of the electric telescopic rod mounting seat. The lower end of the electric telescopic rod is a telescopic end and is connected to the movable plate 1, which can drive the movable plate 1 to rise and fall. The movable plate 1 is located on the upper side of the nut 17 of the flange 15 of the wind turbine tower 14. The driving member 5 makes the movable plate 1 rise and fall, and then makes the movable plate 1 move away from and close to the nut 17 of the wind turbine.

[0036] In some other embodiments, the movable plate 1 may be arranged in an arc shape, and a plurality of movable plates 1 may be provided. The plurality of movable plates 1 are arranged end to end to form a ring, and the plurality of movable plates 1 are driven by the driving member 5 respectively.

[0037] The guide structure provides a linear guide for the movement of the movable panel 1; the guide structure includes a plurality of guide rails 7 axially arranged outside the tower 14, and a slide groove 13 cooperating with the guide rail 7 is arranged on the inner ring side of the movable panel 1. The slide groove 13 slides along the outer side of the guide rail 7 to make the movable panel 1 vertically rise and fall, and a limit is arranged on the upper end of the guide rail 7; in this embodiment, the number of guide rails 7 is set to eight, and the circumference is evenly distributed outside the tower 14. The eight guide rails 7 prevent the movable panel 1 from tilting when rising and falling, and ensure the levelness of the movable panel 1. When in other positions of the wind turbine other than the tower 14, the movable panel 1 should be perpendicular to the axial direction of the cylindrical structure in which it is located.

[0038] In some other embodiments, when the flange 15 and the bolt 16 are located inside the cylinder, the guide rail 7 is arranged inside the cylinder structure of the wind turbine generator set, the slide groove 13 is arranged on the outer ring side of the movable plate 1, and the rotating body 2 is located on the inner ring edge of the movable plate 1.

[0039] In this embodiment, the rotating body 2 is rotatably mounted on the outer ring edge of the movable plate 1, and the rotating body 2 can rotate by itself. Specifically, a plurality of arc grooves 9 are provided on the edge of the movable plate 1, and an arc hole 10 corresponding to the arc groove 9 is provided on the movable plate 1 inside the arc groove 9, and an arc notch 11 is provided between the arc hole 10 and the groove surface of the arc groove 9; the rotating body 2 includes a rotating plate 21, the rotating plate 21 passes through the arc notch 11, and a sliding body 22 that is slidably matched with the arc hole 10 is provided on the edge of the rotating plate 21, and the sliding body 22 can slide circumferentially in the arc hole 10 to realize self-rotation. The cross section of the sliding body 22 is circular, and the outer diameter of the sliding body 22 is greater than the thickness of the rotating plate 21; the cross section of the arc hole 10 is circular and adapted to the sliding body 22, and the upper and lower spans of the arc notch 11 are adapted to the thickness of the rotating plate 21, and can allow the rotating plate 21 and the rotating body 2 to rotate; the rotating plate 21 is made of high manganese steel, which has good wear resistance and deformation resistance.

[0040] The rotating body 2 is provided with a notch 4 corresponding to the nut 17 for the nut 17 to enter; in this embodiment, the rotating body 2 is circular, the rotating plate 21 is circular plate-shaped, the sliding body 22 is annular, and the notch 4 is provided at the center of the rotating plate 21, and the notch 4 is a hexagonal through hole for the nut 17 to enter. In some embodiments, the hexagonal through hole is just enough for the nut 17 to enter, and in this embodiment, when the nut 17 enters the hexagonal through hole, there is a small gap between the nut 17 and the hexagonal through hole.

[0041] After the bolts 16 of the flange 15 of the tower 14 are installed and tightened, corresponding lines are drawn at the head of the nut 17 and the nut 17; the monitoring system of this embodiment is installed; since the angle states of the nuts 17 at various positions on the circumference after reaching the tightening torque are different, the rotating body 2 is rotated to make its missing part 4, i.e., the hexagonal through hole, correspond vertically to the nut 17. According to this method, the hexagonal through holes of all rotating bodies 2 correspond vertically to the nuts 17. When the driving member 5 causes the movable plate 1 to descend, all nuts 17 can enter the inner side of the hexagonal through hole of the corresponding rotating body 2. When a nut 17 is loose, the loose nut 17 cannot be aligned with the corresponding hexagonal through hole. When the movable plate 1 descends, the loose nut 17 is cushioned on the lower side of the movable plate 1, limiting the descending distance of the movable plate 1; according to the different descending distances of the movable plate 1 in the two cases, it can be judged that the nuts 17 evenly distributed on the circumference of this position have loosened. Then the anti-loosening marking line is manually checked to determine the loose nut 17. After tightening, the rotating body 2 is adjusted accordingly so that its hexagonal through hole corresponds to the tightened nut 17.

[0042] Since the wind turbine generator set vibrates during operation, in order to avoid the rotor 2 from being misaligned, it is always kept in correspondence with the unloosened nut 17. This embodiment provides a positioning structure 3, which corresponds to the rotor 2 one by one and limits the rotation of the corresponding rotor 2.

[0043] The positioning structure 3 includes a slider 31 and a gantry 34. The movable plate 1 is provided with a guide groove 12 that is slidably matched with the slider 31. The slider 31 slides vertically in the guide groove 12. The guide groove 12 is connected to the arc hole 10. Slots 23 are evenly arranged on the outer ring side of the sliding body 22 of the rotating body 2. A plug-in strip 32 that is matched with the slot 23 is arranged on one side of the lower part of the slider 31. The plug-in strip 32 is inserted into the slot 23 to realize the positioning of the sliding body 22 and the rotating body 2, thereby preventing the rotating body 2 from rotating. The gantry 34 and the movable plate 1, a spring 35 is provided between the gantry 34 and the slider 31. Specifically, a limit block 33 is provided at the upper end of the slider 31, and two springs 35 are connected between the limit block 33 and the gantry 34. The spring 35 applies a downward force to the limit block 33 and the slider 31, so that the slider 31 enters the guide groove 12, and the insertion strip 32 of the slider 31 is firmly matched with the slot 23, so as to realize the positioning of the rotating body 2. Even if there is a certain vibration outside, it can ensure that the insertion strip 32 and the slot 23 are not separated.

[0044] In order to facilitate the rotation adjustment of the rotating body 2, a traction body is connected to the outside of the slider 31. In this embodiment, the traction body includes a traction ring 37 and a connector 36. The connector 36 passes through the gantry 34 and is connected to the limit block 33. The gantry 34 has a through hole for the connector 36 to pass through. The upper end of the connector 36 is connected to the traction ring 37. By pulling the traction ring 37, the limit block 33 and the slider 31 are moved up to compress the spring 35, and the insertion strip 32 at the bottom of the slider 31 is separated from the slot 23 of the rotating body 2, so that the rotating body 2 can be rotated freely. After the rotating body 2 is adjusted to the right position, the traction body is released, and the spring 35 makes the insertion strip 32 and the slot 23 match again, and the rotating body 2 is positioned.

[0045] The pressure sensor 6 is arranged between the movable plate 1 and the driving member 5. The pressure sensor 6 detects the pressure between the driving member 5 and the movable plate 1; a controller is arranged, and the driving member 5 moves the movable plate 1 toward the nut 17. When the pressure exceeds the set value, the driving member 5 moves the movable plate 1 away from the nut 17.

[0046] When the lower side of the movable plate 1 is not subject to force, the pressure sensor 6 detects the downward gravity of the movable plate 1 and its connecting structure; when the movable plate 1 moves to the upper side of the loose nut 17 or the upper side of the flange 15, the driving member 5 continues to apply a downward force, and the pressure detected by the pressure sensor 6 first decreases, because the movable plate 1 is subjected to the resistance to downward movement, which balances the gravity of the movable plate 1. The driving member 5 continues to apply pressure, and the upward force detected by the pressure sensor 6 gradually increases. Because the movable plate 1 cannot move downward, when the pressure detected by the pressure sensor 6 exceeds the set value, which is twice the gravity value of the movable plate 1 and its connecting structure, it proves that the movable plate 1 cannot move downward, and the controller controls the driving member 5 to reset, and the movable plate 1 rises and resets.

[0047] The above process can be observed manually. In this embodiment, in order to reduce the labor cost caused by a large number of manual inspections, it is preferred to adopt an automatic remote monitoring method. The rangefinder 8 is connected to the controller and sends a signal to the controller. During the operation of the above-mentioned driving member 5, refer to Fig.10 , the distance meter 8 measures the maximum distance that the movable plate 1 moves toward the nut 17; if the distance reaches the set value L, it is determined that the nut 17 is not loose; if the distance is less than the set value L and one times the thickness N of the nut 17, that is, the maximum distance is M, it is determined that the nut 17 is loose. Because the loose nut 17 is deflected and cannot enter the notch 4, the loose nut 17 is cushioned on the lower side of the movable plate 1, limiting the maximum distance of the movable plate 1 in a single stroke.

[0048] When the nut 17 is detected to be loose, the controller sends an alarm message to the control center through the wireless communication module; the staff can be arranged to carry out targeted inspection and maintenance. When the nut 17 is not loose, the staff does not need to conduct on-site inspections, which reduces the cost of human inspection and monitoring. In some embodiments, a timer is set to provide a detection cycle for the loose nut 17 monitoring of the monitoring system. For example, the timer is set to one week. After each week, the controller controls the movable plate 1 to move one stroke and detects the condition of the nut 17 once.

[0049] Specific embodiment 2 of the wind turbine generator monitoring system provided by the present invention: See also Figure 11-12 In Example 1, the rotating body 2 is circular, while in this embodiment, the rotating body 2 is semicircular in shape, the rotating plate 21 is semicircular in shape, the sliding body 22 is semicircular in shape, and a notch 4 is provided in the middle of the straight edge of the rotating plate 21, and the notch 4 corresponds to the nut 17 part and allows the nut 17 part to enter.

[0050] Specifically, the notch 4 corresponds to a half of the nut 17 , and the notch 4 has four surfaces corresponding to the four adjacent side surfaces of the nut 17 .

[0051] In Example 1, the rotating body 2 is not easy to be removed and replaced; in this embodiment, the rotating body 2 is semicircular, and after the slider 31 of the positioning structure 3 is separated from the sliding body 22 of the rotating body 2, the rotating body 2 can be easily rotated and removed, and when the rotating body 2 is damaged, it can be conveniently replaced.

[0052] Specific embodiment 3 of the wind turbine generator monitoring system provided by the present invention: See also Figure 13-14 In this embodiment, the notch 4 corresponds to half of the nut 17; the difference from Embodiment 2 is that the notch 4 has three surfaces corresponding to the three adjacent side surfaces of the nut 17 respectively.

[0053] In summary, in Embodiment 2 and Embodiment 3, the size of the notch 4 is smaller than that of Embodiment 1, but it is removable and replaceable. When the nut 17 becomes loose, the nut 17 deflects, which can ensure that at least two to three corners of the nut 17 are cushioned on the lower side of the movable plate 1.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind turbine generator monitoring system, characterized in that: include: A movable plate (1) and a driving member (5) for driving the movable plate (1) to move, wherein the driving member (5) causes the movable plate (1) to move closer to and farther from a nut (17) of a wind turbine generator set; A plurality of rotating bodies (2) corresponding to the nuts (17) one by one, the rotating bodies (2) being rotatably mounted on the movable plate (1), and the rotating bodies (2) being provided with notches (4) corresponding to the nuts (17) for the nuts (17) to enter; A plurality of positioning structures (3), wherein the positioning structures (3) correspond to the rotating bodies (2) one by one and restrict the rotation of the corresponding rotating bodies (2); A guide structure, providing a linear guide for the movement of the movable plate (1); The pressure sensor (6) detects the pressure between the driving member (5) and the movable plate (1); the driving member (5) causes the movable plate (1) to move toward the nut (17); when the pressure exceeds a set value, the driving member (5) causes the movable plate (1) to move away from the nut (17).

2. The wind turbine generator monitoring system according to claim 1, characterized in that: It also includes a distance meter (8); the distance meter (8) measures the maximum distance that the movable plate (1) moves toward the nut (17); if the distance reaches a set value, it is determined that the nut (17) is not loose; if the distance is less than the set value and one times the thickness of the nut (17), it is determined that the nut (17) is loose.

3. The wind turbine generator monitoring system according to claim 1, characterized in that: The movable plate (1) is annular in shape and surrounds a tower (14) of a wind turbine generator set; the guide structure comprises a plurality of guide rails (7) axially arranged outside the tower (14); and a slide groove (13) cooperating with the guide rail (7) is provided on the inner ring side of the movable plate (1).

4. The wind turbine generator monitoring system according to claim 1, characterized in that: The movable plate (1) is provided with a plurality of arc grooves (9) at its edge, and the movable plate (1) inside the arc grooves (9) is provided with arc holes (10) corresponding to the arc grooves (9), and an arc notch (11) is provided between the arc hole (10) and the groove surface of the arc groove (9); the rotating body (2) comprises a rotating plate (21), the rotating plate (21) passes through the arc notch (11), and the edge of the rotating plate (21) is provided with a sliding body (22) that slidably cooperates with the arc hole (10).

5. The wind turbine generator monitoring system according to claim 4, characterized in that: The positioning structure (3) comprises a slider (31) and a gantry (34); a guide groove (12) slidably matched with the slider (31) is provided on the movable plate (1), and the guide groove (12) is communicated with the arc hole (10); slots (23) are evenly arranged on the outer ring side of the sliding body (22), and a plug strip (32) matched with the slots (23) is provided on one side of the lower part of the slider (31); the gantry (34) is connected to the movable plate (1), and a spring (35) is provided between the gantry (34) and the slider (31), and the spring (35) enables the slider (31) to enter the guide groove (12) and the plug strip (32) to be inserted into the slot (23); and a traction body is connected to the outer side of the slider (31).

6. The wind turbine generator monitoring system according to claim 4 or 5, characterized in that: The rotating body (2) is circular in shape, the rotating plate (21) is circular in shape, the sliding body (22) is annular in shape, and the notch (4) is provided at the center of the rotating plate (21). The notch (4) is a hexagonal through hole for the nut (17) to enter.

7. The wind turbine generator monitoring system according to claim 4 or 5, characterized in that: The rotating body (2) is in the shape of a semicircle, the rotating plate (21) is in the shape of a semicircular plate, the sliding body (22) is in the shape of a semicircular ring, and the notch (4) is provided in the middle of the straight edge of the rotating plate (21), the notch (4) corresponds to a part of the nut (17) and allows a part of the nut (17) to enter.

8. The wind turbine generator monitoring system according to claim 7, characterized in that: The notch (4) corresponds to a half of the nut (17), and the notch (4) has four surfaces corresponding to four adjacent side surfaces of the nut (17).

9. The wind turbine generator monitoring system according to claim 7, characterized in that: The notch (4) corresponds to half of the nut (17), and the notch (4) has three surfaces corresponding to three adjacent side surfaces of the nut (17).

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