Auxiliary device for detecting size of main shaft of wind turbine generator

Abstract

The invention belongs to the technical field of wind turbine generator detection, and discloses a wind turbine generator main shaft size detection auxiliary device which comprises a base and a wind turbine generator placed on the top of the base. Through cooperation of structures such as the wind turbine generator and the detection assemblies, the rubber wheel is rolled on the rotating main shaft, when the main shaft eccentrically rotates, the main shaft pushes a plurality of arc-shaped plates in each detection assembly to generate displacement, and the arc-shaped plates on the two sides push guide plates through guide rods to squeeze hydraulic oil in a second oil drum into a first oil drum, so that the hydraulic oil in the second oil drum enters the first oil drum; the middle arc-shaped plate pushes the sealing plate to ascend and extrude hydraulic oil, finally, the hydraulic cylinder is forced to extend, the display assembly limits the displacement of the indicating plate and then does not return to the initial position, the offset angle of the main shaft can be more comprehensively recorded through the arrangement of the arc-shaped plates, each detection assembly is an independent individual, and the detection accuracy is improved. In this way, the angle of deviation caused by rotation of the main shaft can be recorded independently, and meanwhile accurate numerical values can be further obtained so that subsequent maintenance can be facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of wind turbine detection, and in particular is an auxiliary device for detecting the size of a main shaft of a wind turbine. Background Art

[0002] Wind turbines are the core of wind power generation systems, covering every step from wind energy capture to electrical energy conversion. After manufacturing, to ensure safe, stable, and efficient operation, they are typically powered on and rigorously tested. This includes inspecting key components such as the generator, gearbox, control system, main shaft, and gearbox. The most important of these is the dimensional inspection of the main shaft and turbine. If any deviation in the assembly dimensions occurs, the turbine will require an overhaul to determine where the problem lies. The existing technology usually uses a large three-dimensional coordinate measuring machine to inspect wind turbines. After power is turned on, the electronic components inside the unit are inspected first, and damaged electronic components are repaired or replaced. This technical means generally detects the assembly dimensions of the main shaft in a stationary state. However, during the rotation of the main shaft, the installation deviation will gradually be amplified due to the influence of weight, which makes it impossible for the existing technology to obtain more accurate detection values. For this reason, we provide a wind turbine main shaft dimension detection auxiliary device. Summary of the Invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a wind turbine main shaft size detection auxiliary device, which solves the problem that during the rotation of the main shaft, the installation deviation will be gradually amplified due to the influence of weight, which makes it impossible for the existing technology to obtain more accurate detection values.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: an auxiliary device for detecting the size of a main shaft of a wind turbine generator set, comprising a base and a wind turbine generator set placed on top of the base, and further comprising; A buffer component installed on the top of the base and used to reduce the vibration of the wind turbine; The screw motor is fixed on the top of the base; A bracket slidably mounted on the top of the base and threadedly connected to the output shaft of the screw motor; A display assembly fixed to one side of the bracket and a drive assembly fixed to the other side; Rotate the locking assembly installed in the middle of the bracket; A plurality of detection components are arranged at equal angles in a circular direction on the driving component; The detection assembly comprises three arc-shaped plates, a rubber wheel is mounted on the bottom bearing of the arc-shaped plate, an oil tank one is communicated with the inner side of the oil supply ring, the inner side of the oil tank one is fixed with two symmetrical oil tank twos which are communicated with the inner side of the oil tank one through a sealing plate, the two oil tank twos are jointly fixed on the middle arc-shaped plate, each oil tank two is hinged with the two side arc-shaped plates through a guide plate and a guide rod, an indicating plate is mounted on the display assembly, and a hydraulic cylinder which abuts against the top of the indicating plate is communicated with the oil tank one. The driving assembly is used for infusing oil into the oil tank one, and the locking assembly is used for preventing the oil in the driving assembly from entering the oil tank one. The display assembly is used for preventing the indicating plate from returning to the initial position after displacement.

[0005] Preferably, the driving assembly comprises an oil supply ring which is fixed in the inner side of the support, a plurality of closed rods are mounted on the outer periphery of the oil supply ring at equal angles, a threaded rod is screw-mounted on the outer side of the oil supply ring, the inner side of the oil supply ring is filled with oil, and the outer side of the threaded rod movably clamps a crank.

[0006] Preferably, the locking assembly comprises a locking ring which is rotatably mounted in the inner side of the support, a plurality of inclined grooves are formed in the side surface of the locking ring at equal angles, each closed rod movably clamps in the locking ring, and a locking groove for the crank to enter is formed in the outer side of the locking ring.

[0007] Preferably, the outer side of the locking ring is provided with a metal plate which movably penetrates the outer side of the support, and the locking groove is located on the metal plate.

[0008] Preferably, the display assembly comprises a detection plate which is fixed on the side surface of the support, each indicating plate is elastically connected with the detection plate through a plurality of spring expansion rods which are mounted at equal angles, and the indicating plate movably clamps the side surface of the detection plate.

[0009] Preferably, the top of the indicating plate is hingedly connected with an inclined gear plate one through a guide plate, the inner side of the detection plate is connected with an inclined gear plate two through an electric expansion rod, the width of the inner groove of the detection plate is less than the width of the inclined gear plate two, the top of the indicating plate is elastically connected with the middle part of the guide plate through an elastic member one, and the side surface of the guide plate is elastically connected with the inclined gear plate one through an elastic member two.

[0010] Preferably, the elastic member one always pulls the guide plate to approach the side surface of the detection plate, and the elastic member two always pushes the inclined gear plate one to engage with the inclined gear plate two.

[0011] Preferably, the buffer assembly comprises two dampers which are hingedly connected with the top of the base at two ends respectively, the top of each damper is hingedly connected with a metal sheet which abuts against the outer side of the wind turbine generator, and the outer side of each metal sheet is jointly connected with a limiting frame through a plurality of nuts.

[0012] Preferably, rubber pads are attached to the side of the metal sheet close to the wind turbine, and the limiting frame is made of metal and has a lock at the top for hoisting.

[0013] Preferably, the top of the base is provided with a groove matching the bottom of the wind turbine, and the four corners of the top of the base are respectively provided with a lock.

[0014] Compared with the prior art, the present application has the following advantages: The present application cooperates the wind turbine and the detection assembly, and the rubber wheel rolls on the rotating main shaft. When the main shaft forms eccentric rotation, it pushes the several arc-shaped plates in each detection assembly to displace, the two side arc-shaped plates push the guide plate to extrude the hydraulic oil in the second oil barrel into the first oil barrel through the guide rod, the middle arc-shaped plate pushes the sealing plate to rise and extrude the hydraulic oil, and finally forces the hydraulic cylinder to extend. The display assembly limits the displacement of the indicating plate, and the indicating plate will not return to the original position. The several arc-shaped plates can comprehensively record the angle of the main shaft deviation, each detection assembly is an independent individual, the angle of the main shaft rotation deviation can be recorded individually, and accurate values can be further obtained for subsequent maintenance.

[0015] The present application cooperates the drive assembly and the locking assembly, the weight of the metal plate forces the locking ring to rotate, so that the closing rod is always located at the outer end of the inclined groove, the connection between the first oil barrel and the oil supply ring is not closed by the closing rod, the operator can control the amount of hydraulic oil entering the oil supply ring through the threaded rod, and the position of the locking ring does not need to be excessively concerned. After the hydraulic oil enters the first oil barrel, the rotating locking ring makes the closing rod descend along the track of the inclined groove and close the connection between the oil supply ring and the first oil barrel. When the inclined groove and the handle are located in the same plane, the sliding handle enters the locking groove, at this time, the handle cannot drive the threaded rod to descend, and the locking ring cannot rotate, so that the self-locking purpose is achieved, and the stability of the device is improved.

[0016] The present application cooperates the display assembly and the detection assembly. When the hydraulic cylinder pushes the indicating plate to descend, the spring telescopic rod is compressed, and the spring telescopic rod and the inclined tooth plate descend at the same time. Due to the limitation of the elastic member I and the elastic member II, the inclined tooth plate I will be close to the inclined tooth plate II. When the hydraulic cylinder retracts, the inclined tooth plate II limits the inclined tooth plate I to rise, and the inclined tooth plate I is no longer in contact with the indicating plate. The spring telescopic rod will always be in a compressed state, and the angle of the main shaft deviation is further and more clearly recorded. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the appearance structure of the present application; Figure 2Schematic diagram of the internal structure of the bracket of the present invention; Figure 3 This is a schematic diagram of the threaded rod and locking groove structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of an oil drum according to the present invention; Figure 5 This is a schematic diagram of the exploded structure of the detection component of the present invention; Figure 6 This is a schematic diagram of the structure coordination between the display component and the detection component of the present invention; Figure 7 This is a schematic diagram of the internal structure of the detection board of the present invention; Figure 8 This is a schematic diagram of the structure of the buffer assembly and the wind turbine generator set of the present invention.

[0018] In the figure: 1. Base; 2. Screw motor; 3. Bracket; 4. Buffer assembly; 41. Damper; 42. Metal sheet; 43. Limiting frame; 5. Display assembly; 51. Detection plate; 52. Spring telescopic rod; 53. Guide plate; 54. Elastic part 1; 55. Bevel gear plate 1; 56. Elastic part 2; 57. Bevel gear plate 2; 58. Electric telescopic rod; 6. Drive assembly; 61. Oil supply ring; 62. Closing rod; 63. Threaded rod; 64. Crank handle; 7. Detection assembly; 71. Oil drum 1; 72. Sealing plate; 73. Oil drum 2; 74. Guide plate; 75. Guide rod; 76. Arc plate; 77. Hydraulic cylinder; 78. Indicator plate; 79. Rubber wheel; 8. Locking assembly; 81. Locking ring; 82. Locking groove; 83. Inclined groove; 9. Wind turbine. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 8 As shown, the present invention provides a wind turbine main shaft size detection auxiliary device, comprising a base 1 and a wind turbine 9 placed on top of the base 1, and further comprising; A buffer assembly 4 mounted on the top of the base 1 and used to reduce vibration of the wind turbine 9; A screw motor 2 fixedly mounted on the top of the base 1; A bracket 3 is slidably mounted on the top of the base 1 and is threadedly connected to the output shaft of the screw motor 2; A display assembly 5 fixed to one side of the bracket 3 and a driving assembly 6 on the other side; A locking assembly 8 is rotatably installed in the middle of the support 3; A plurality of detection assemblies 7 are equiangularly arranged on the driving assembly 6 in a ring shape; The detection assembly 7 comprises three arc-shaped plates 76 and an oil tank I 71 connected to the inner side of the oil supply ring 61, the bottom of the arc-shaped plate 76 is bearing-mounted with a rubber wheel 79, the inside of the oil tank I 71 is fixed with two symmetrical oil tank II 73 which are connected to the inside of the oil tank I 71 through a sealing plate 72, the two oil tank II 73 are jointly fixed on the middle arc-shaped plate 76, each oil tank II 73 is hingedly connected to the two side arc-shaped plates 76 through a guide plate 74 and a guide rod 75, the display assembly 5 is installed with an indicating plate 78, the oil tank I 71 is connected with a hydraulic cylinder 77 which abuts against the top of the indicating plate 78; The driving assembly 6 is used to inject oil into the oil tank I 71, and the locking assembly 8 is used to prevent the oil in the driving assembly 6 from entering the oil tank I 71; The display assembly 5 is used to prevent the indicating plate 78 from returning to the initial position after displacement.

[0021] By using the above scheme, the wind turbine 9 is preferentially hoisted to the top of the base 1, and the support 3 is displaced by driving the lead screw motor 2, and the lead screw motor 2 is stopped when the plurality of detection assemblies 7 are located at the outer periphery of the main shaft of the wind turbine 9; Hydraulic oil is pumped into the inside of the oil tank I 71 through the driving assembly 6, at this time, the sealing plate 72 is lowered, and the rubber wheel 79 at the bottom of the arc-shaped plate 76 gradually contacts the main shaft, and the material of the rubber wheel 79 can make it not scratch the main shaft when contacting the main shaft, and then the driving assembly 6 is controlled by the locking assembly 8 to stop pumping hydraulic oil into the oil tank I 71; When the wind turbine 9 starts, the main shaft rotates, the rubber wheel 79 rolls on the main shaft, when the main shaft and the internal elements of the wind turbine 9 have size deviation during installation, it forms eccentric rotation and pushes each detection assembly 7 to displace the plurality of arc-shaped plates 76, when the two side arc-shaped plates 76 displace, they push the guide plate 74 to rise through the guide rod 75, and the hydraulic oil in the inside of the oil tank II 73 is extruded into the oil tank I 71 through the guide plate 74, when the middle arc-shaped plate 76 rises, it pushes the sealing plate 72 to rise and extrudes the hydraulic oil through the oil tank II 73, since the driving assembly 6 will not pump hydraulic oil into the oil tank I 71, at this time, the excess hydraulic oil will enter the hydraulic cylinder 77, so as to force the hydraulic cylinder 77 to extend and push the indicating plate 78 to descend, due to the limitation of the display assembly 5, the indicating plate 78 will not return to the initial position after displacement; The plurality of arc-shaped plates 76 are attached to the main shaft through the rubber wheel 79, which makes the angle of the main shaft deviation more fully recorded, and each detection assembly 7 is an independent individual, which makes the angle of the main shaft rotation caused by the deviation can be recorded individually, and accurate values can be further obtained for subsequent maintenance.

[0022] As Figures 1-3 shown in the figure, the driving assembly 6 comprises an oil supply ring 61 fixed in the inside of the support 3, a plurality of closed rods 62 are installed on the outer periphery of the oil supply ring 61 at equal angles, a threaded rod 63 is installed on the outside of the oil supply ring 61, the inside of the oil supply ring 61 is filled with oil, and a crank 64 is movably connected to the outside of the threaded rod 63.

[0023] By the above scheme, the threaded rod 63 can be rotated more labor-saving and conveniently by the crank 64, the volume of the threaded rod 63 in the oil supply ring 61 increases after displacement, the hydraulic oil can enter the inside of the oil bucket 71, and the hydraulic oil can be extracted by reverse rotation after the test is completed, so that the device operation is more simple.

[0024] As Figures 1-3 shown in the figure, the locking assembly 8 comprises a locking ring 81 rotatably installed in the inside of the support 3, a plurality of inclined grooves 83 are formed on the side surface of the locking ring 81 at equal angles, each closed rod 62 is movably connected to the inside of the locking ring 81, and a locking groove 82 for the entry of the crank 64 is formed on the outside of the locking ring 81.

[0025] The outside of the locking ring 81 is provided with a metal plate movably penetrating the outside of the support 3, and the locking groove 82 is located on the metal plate.

[0026] By the above scheme, when the device is not working, the weight of the metal plate forces the locking ring 81 to rotate, so that the closed rod 62 is located at the outer end of the inclined groove 83, the connection between the oil bucket 71 and the oil supply ring 61 is not closed by the closed rod 62, the operator can control the amount of hydraulic oil entering the oil supply ring 61 through the threaded rod 63, and also does not need to pay excessive attention to the position of the locking ring 81. When the hydraulic oil enters the oil bucket 71, the locking ring 81 can be rotated more conveniently through the metal plate, so that the closed rod 62 descends through the track of the inclined groove 83 and closes the communication between the oil supply ring 61 and the oil bucket 71, when the inclined groove 83 and the crank 64 are located in the same plane, the sliding crank 64 enters the locking groove 82, at this time the crank 64 cannot drive the threaded rod 63 to descend, and the locking ring 81 cannot be rotated, so that the self-locking purpose is achieved, and the stability of the device working is improved.

[0027] As Figures 1-7 shown in the figure, the display assembly 5 comprises a detection plate 51 fixed on the side surface of the support 3, a plurality of spring expansion rods 52 are installed at equal angles, the detection plate 51 is elastically connected with each indicating plate 78, and the indicating plate 78 is movably connected to the side surface of the detection plate 51.

[0028] The top of the indicating plate 78 is hinged with a bevel gear plate one 55 through the guide plate 53, the inner side of the detecting plate 51 is connected with a bevel gear plate two 57 through the electric telescopic rod 58, the width of the inner slot of the detecting plate 51 is less than the width of the bevel gear plate one 55, the top of the indicating plate 78 is elastically connected with the middle part of the guide plate 53 through the elastic member one 54, and the side of the guide plate 53 is elastically connected with the bevel gear plate one 55 through the elastic member two 56.

[0029] The elastic member one 54 always pulls the guide plate 53 to be close to the side of the detecting plate 51, and the elastic member two 56 always pushes the bevel gear plate one 55 to engage with the bevel gear plate two 57.

[0030] By adopting the above scheme, when the hydraulic cylinder 77 pushes the indicating plate 78 to descend, the spring telescopic rod 52 is compressed, and drives the spring telescopic rod 52 and the bevel gear plate one 55 to descend, and because of the restriction of the elastic member one 54 and the elastic member two 56, the bevel gear plate one 55 will be close to the bevel gear plate two 57, when the hydraulic cylinder 77 is retracted, the bevel gear plate two 57 limits the bevel gear plate one 55 to ascend, and the bevel gear plate one 55 is no longer in contact with the indicating plate 78, and the spring telescopic rod 52 will always be in a compressed state, and further, the angle of the spindle offset is recorded more clearly. When the test work is finished, the displacement of the bevel gear plate two 57 is controlled through the electric telescopic rod 58, because the width of the slot in the detecting plate 51 for placing the bevel gear plate two 57 is less than the width of the bevel gear plate one 55, the bevel gear plate two 57 is no longer in contact with the bevel gear plate one 55, and the spring telescopic rod 52 pushes the indicating plate 78 to return to the initial position, and the convenience of the device work is further improved.

[0031] As shown in Figure 1 and Figure 8 , the buffer assembly 4 comprises two dampers 41 respectively hinged at the two ends of the top of the base 1, the top of each damper 41 is hinged with a metal sheet 42 attached to the outside of the wind turbine generator 9, and the outside of each metal sheet 42 is connected with a limiting frame 43 through a plurality of nuts.

[0032] The side of the metal sheet 42 close to the wind turbine generator 9 is pasted with a rubber pad, and the limiting frame 43 is made of metal and has a lock catch installed at the top for hoisting.

[0033] By adopting the above scheme: when the buffer assembly 4 is in the state as shown in Figure 8 , the vibration generated by the rotation of the wind turbine generator 9 will be weakened by the damper 41, thereby reducing the misjudgment caused by the vibration, and the lock catch on the limiting frame 43 can facilitate subsequent disassembly and replacement of the wind turbine generator 9, wherein the rubber pad can avoid scratching the external paint of the wind turbine generator 9 when the metal sheet 42 contacts the wind turbine generator 9.

[0034] As shown in Figure 1 and Figure 8As shown, the top of the base 1 is provided with a groove matching the bottom of the wind turbine 9, and a lock catch is installed at each corner of the top of the base 1.

[0035] With the above scheme, the groove at the top of the base 1 can better place the wind turbine 9 thereon, and the lock catches at the four corners of the base 1 can facilitate subsequent hoisting and replacement of position when the device is not working.

[0036] Working principle and use process of the present application: The wind turbine 9 is hoisted to the top of the base 1 first, and the support 3 is driven to displace by the lead screw motor 2, and the lead screw motor 2 can be stopped when the detection assemblies 7 are located at the outer periphery of the main shaft of the wind turbine 9. The limiting frame 43 is fixed to the metal sheet 42 by a nut, and the vibration generated by the operation of the wind turbine 9 is weakened by the damper 41. The threaded rod 63 is rotated by the crank 64, and the hydraulic oil enters the inside of the oil bucket 1, and when the hydraulic oil is pumped into the inside of the oil bucket 1, the sealing plate 72 is lowered, and the rubber wheel 79 at the bottom of the arc-shaped plate 76 gradually contacts the main shaft. The locking ring 81 is rotated by the metal plate, so that the sealing rod 62 is lowered along the track of the inclined groove 83 and seals the communication between the oil supply ring 61 and the oil bucket 1, and when the inclined groove 83 and the crank 64 are located in the same plane, the sliding crank 64 is inserted into the locking groove 82, at this time the crank 64 cannot lower the threaded rod 63, and the locking ring 81 cannot be rotated, so as to achieve the purpose of self-locking. The main shaft rotates, and the rubber wheel 79 rolls on the main shaft, and when the main shaft and the internal elements of the wind turbine 9 are installed with size deviation, it forms eccentric rotation and pushes the displacement of the arc-shaped plates 76 in each detection assembly 7, when the two arc-shaped plates 76 are displaced, they push the guide plate 74 to rise through the guide rod 75, and the hydraulic oil in the inside of the oil bucket 2 is squeezed into the oil bucket 1 through the guide plate 74, and when the middle arc-shaped plate 76 rises, it pushes the sealing plate 72 to rise and squeezes the hydraulic oil through the oil bucket 2, since the driving assembly 6 will not pump the hydraulic oil into the oil bucket 1, at this time the excess hydraulic oil will enter the hydraulic cylinder 77, so as to force the hydraulic cylinder 77 to extend and push the indicating plate 78 to descend. The spring telescopic rod 52 is compressed, and at the same time drives the spring telescopic rod 52 and the oblique toothed plate 1 to descend, and due to the limitation of the elastic member 1 and the elastic member 2, the oblique toothed plate 1 will be tightly attached to the oblique toothed plate 2, when the hydraulic cylinder 77 retracts, the oblique toothed plate 2 limits the oblique toothed plate 1 to rise, and it is no longer in contact with the indicating plate 78, and the spring telescopic rod 52 will always be in a compressed state.

[0037] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0038] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A wind turbine main shaft size detection auxiliary device, comprising a base (1) and a wind turbine (9) placed on top of the base (1), characterized in that: Also includes; A buffer component (4) mounted on the top of the base (1) and used to mitigate vibrations of the wind turbine (9); A screw motor (2) fixedly mounted on the top of the base (1); A bracket (3) slidably mounted on the top of the base (1) and threadedly connected to the output shaft of the screw motor (2); A display assembly (5) fixedly mounted on one side of the bracket (3) and a driving assembly (6) on the other side; Rotate the locking assembly (8) mounted in the middle of the bracket (3); A plurality of detection components (7) are arranged on the driving component (6) at equal angles in a circular direction; The detection assembly (7) includes three arc-shaped plates (76) and an oil barrel (71) connected to the inner side of the oil supply ring (61). The bottom bearing of the arc-shaped plate (76) is equipped with a rubber wheel (79). The interior of the oil barrel (71) is fixed with two symmetrical oil barrels (73) connected to the inside of the oil barrel (71) through a sealing plate (72). The two oil barrels (73) are fixed together on the middle arc-shaped plate (76). Each of the oil barrels (73) is hinged to the arc-shaped plates (76) on both sides through a guide plate (74) and a guide rod (75). The display assembly (5) is equipped with an indicator plate (78). The oil barrel (71) is connected to a hydraulic cylinder (77) that abuts against the top of the indicator plate (78). The driving assembly (6) is used to inject oil into the oil barrel (71), and the locking assembly (8) is used to prevent the oil in the driving assembly (6) from entering the oil barrel (71); The display assembly (5) is used to prevent the indicator plate (78) from returning to its initial position after displacement.

2. The auxiliary device for detecting the size of the main shaft of a wind turbine generator set according to claim 1, characterized in that: The driving assembly (6) includes an oil supply ring (61) fixed inside the bracket (3), a plurality of closing rods (62) are installed at equal angles on the outer periphery of the oil supply ring (61), a threaded rod (63) is installed on the outer thread of the oil supply ring (61), the interior of the oil supply ring (61) is filled with oil, and a crank handle (64) is movably connected to the outer side of the threaded rod (63).

3. The auxiliary device for detecting the main shaft size of a wind turbine generator set according to claim 2, characterized in that: The locking assembly (8) includes a locking ring (81) rotatably mounted inside the bracket (3), a side surface of the locking ring (81) is provided with a plurality of inclined grooves (83) at equal angles in a circumferential direction, each of the closing rods (62) is movably engaged in the locking ring (81), and a locking groove (82) for the crank (64) to enter is provided on the outer side of the locking ring (81).

4. The auxiliary device for detecting the main shaft size of a wind turbine generator set according to claim 3, characterized in that: A metal plate that movably passes through the outside of the bracket (3) is provided on the outside of the locking ring (81), and the locking groove (82) is located on the metal plate.

5. The auxiliary device for detecting the size of the main shaft of a wind turbine generator set according to claim 4, characterized in that: The display assembly (5) includes a detection plate (51) fixed to the side of the bracket (3), the detection plate (51) is elastically connected to each of the indicator plates (78) through a plurality of spring telescopic rods (52) installed at equal angles in a circular direction, and the indicator plates (78) are movably connected to the side of the detection plate (51).

6. The auxiliary device for detecting the main shaft size of a wind turbine generator set according to claim 5, characterized in that: The top of the indicator plate (78) is hingedly connected to the bevel tooth plate 1 (55) through the guide plate (53), and the inner side of the detection plate (51) is connected to the bevel tooth plate 2 (57) through the electric telescopic rod (58). The width of the bevel tooth plate 2 (57) located in the inner notch of the detection plate (51) is smaller than the width of the bevel tooth plate 1 (55). The top of the indicator plate (78) is elastically connected to the middle of the guide plate (53) through the elastic member 1 (54), and the side of the guide plate (53) is elastically connected to the bevel tooth plate 1 (55) through the elastic member 2 (56).

7. The auxiliary device for detecting the size of the main shaft of a wind turbine generator set according to claim 6, characterized in that: The elastic member 1 (54) pulls the guide plate (53) to always approach the side of the detection plate (51), and the elastic member 2 (56) always pushes the bevel tooth plate 1 (55) to engage with the bevel tooth plate 2 (57).

8. The auxiliary device for detecting the size of the main shaft of a wind turbine generator set according to claim 1, characterized in that: The buffer assembly (4) comprises two dampers (41) hingedly connected to the two ends of the top of the base (1), the top of each damper (41) is hingedly connected to a metal sheet (42) attached to the outside of the wind turbine (9), and the outside of each metal sheet (42) is connected to a limit frame (43) via a plurality of nuts.

9. The auxiliary device for detecting the size of the main shaft of a wind turbine generator set according to claim 8, characterized in that: A rubber pad is adhered to one side of the metal sheet (42) close to the wind turbine generator set (9), and the limiting frame (43) is made of metal and has a lock buckle for hoisting installed on the top.

10. The auxiliary device for detecting the size of the main shaft of a wind turbine generator set according to claim 1, characterized in that: The top of the base (1) is provided with a groove that fits the bottom of the wind turbine generator set (9), and a lock buckle is respectively installed at the four corners of the top of the base (1).

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