A static balance test device and method for a wind turbine rotor support

Abstract

The invention discloses a static balance test device and method for a rotor support of a wind turbine generator, and relates to the technical field of wind power generation, comprising: a mounting platform, which is arranged parallel to a horizontal plane; two support columns, which are arranged and fixedly mounted on the mounting platform; a roller frame, which is fixedly mounted on the support column, and the two roller frames are at the same height; a static balance fixed shaft, whose two ends are respectively placed on the two roller frames; a static balance driving mechanism, which is fixedly mounted on any support column and is used for applying and removing a torque to the static balance fixed shaft so as to make the static balance fixed shaft rotate around its own axis; through the design, manufacture and use of the static balance test bench, a new example of static balance test of a rotor of a large wind turbine generator is created, the performance and life of the large wind turbine generator are improved, and the margin for low wind speed operation of the wind turbine generator is increased.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a static balance test device and method for a rotor support of a wind power generator. Background Art

[0002] The minimum wind speed at which a wind turbine can operate normally is called the cut-in wind speed; the cut-in wind speed for small wind turbines is generally 2-3m / s, and the rated wind speed is 8-10m / s; the cut-in wind speed for medium-sized wind turbines is generally 3-4m / s, and the rated wind speed is 8-14m / s; the cut-in wind speed for large wind turbines is generally 4-5m / s, and the rated wind speed is 12-25m / s; the deviation of the center of mass of the wind turbine rotor assembly from the axis causes dynamic and static imbalance, which will inevitably increase the cut-in wind speed of existing wind turbines, resulting in failure to operate normally and generate electricity under normal cut-in wind speed conditions.

[0003] At present, the rotors of high-speed small generators can be tested and balanced on a dynamic balancing test bench to correct the dynamic and static imbalance of the rotor assembly to ensure the normal operation of the motor. However, for the dynamic and static imbalance of the rotor assembly of large, low-speed wind turbines, due to their heavy weight and large size, dynamic balancing test machines cannot currently be designed and manufactured. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art and provide a static balance test device and method for a rotor support of a wind turbine generator.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A static balance test device for a wind turbine rotor support, comprising:

[0007] The installation platform is set parallel to the horizontal plane;

[0008] There are two support columns, both of which are fixedly installed on the mounting platform;

[0009] The roller frames are fixedly mounted on the support column, and the two roller frames are at the same height;

[0010] A statically balanced fixed shaft, with its two ends placed on two roller frames;

[0011] The static balancing driving mechanism is fixedly mounted on any supporting column and is used to apply and remove torque to the static balancing fixed shaft so as to make the static balancing fixed shaft rotate around its own axis.

[0012] As a preferred solution of the static balance test device for the rotor support of a wind turbine generator of the present invention, wherein: a first clutch claw is fixedly arranged at one end of the static balance fixed shaft facing the static balance drive mechanism;

[0013] The static balancing drive mechanism includes a second clutch claw, a translation drive assembly for driving the second clutch claw to translate axially along the static balancing fixed axis, and a rotation drive assembly for driving the second clutch claw to rotate around its own axis. The axis of the second clutch claw coincides with the axis of the first clutch claw.

[0014] As a preferred solution of the static balance test device for the rotor support of a wind turbine generator of the present invention, the rotary drive assembly includes a drive motor, a reducer connected to the drive motor, and a spline shaft connected to the reducer, the second clutch claw is coaxially sleeved on the outside of the spline shaft, and the spline shaft is spline-connected to the second clutch claw;

[0015] The translation driving assembly comprises a driving cylinder, a piston rod of the driving cylinder is fixedly connected to the second clutch claw, and a moving direction of the driving cylinder piston rod is parallel to an axial direction of the spline shaft.

[0016] As a preferred solution of the static balance test device for the rotor support of a wind turbine generator of the present invention, a limit baffle for limiting the moving range of the second clutch claw is fixedly installed on one end of the spline shaft adjacent to the second clutch claw.

[0017] As a preferred solution of the static balance test device for the rotor support of a wind turbine generator of the present invention, wherein: an adjustment component for adjusting the horizontal position of the static balance fixed axis is arranged on the other support column;

[0018] The adjusting assembly includes a nut seat fixedly mounted on the support column and an adjusting screw threadedly mounted in the nut seat, the axis of the adjusting screw coincides with the axis of the static balancing fixed shaft, and one end of the adjusting screw abuts against one end of the static balancing fixed shaft.

[0019] As a preferred solution of the static balance test device for the rotor support of a wind turbine generator of the present invention, a hand wheel is fixedly mounted on one end of the adjusting screw away from the static balance fixed axis, and the axis of the hand wheel coincides with the axis of the adjusting screw.

[0020] The present invention also provides a method for static balancing test of a rotor support of a wind turbine generator, which is based on any one of the above-mentioned static balancing test devices for a rotor support of a wind turbine generator, and comprises:

[0021] Start the driving cylinder so that the piston rod drives the second clutch claw to move toward the first clutch claw until the second clutch claw is engaged with the first clutch claw;

[0022] Start the drive motor. After the speed reducer reduces the speed and increases the torque, the drive motor transmits the torque to the second clutch claw through the spline shaft, so that the second clutch claw drives the first clutch claw to rotate synchronously, and then drives the static balance fixed shaft to rotate synchronously at 6-7r / min for 1-2min;

[0023] Switch the drive cylinder reversing valve to make the piston rod drive the second clutch claw away from the first clutch claw, so that the static balance fixed shaft loses torque. The static balance fixed shaft stops rotating under the wind resistance and the resistance torque of its own static imbalance. Use a marker to color and mark the area just below the axis of the static balance fixed shaft.

[0024] Repeat the above operation to make the static balance fixed axis rotate and stop several times in succession, and record the position of the colored mark;

[0025] If the colored mark is randomly located in any direction of the circumference of the axis centerline of the statically balanced fixed shaft, it means that there is no static imbalance in the statically balanced fixed shaft; if the colored mark is always located directly below the axis centerline of the statically balanced fixed shaft, it means that there is static imbalance in the statically balanced fixed shaft.

[0026] As a preferred solution of the static balance test method of the wind turbine rotor support of the present invention, wherein: a counterweight is installed at a position just above the axis of the static balance fixed shaft;

[0027] Make the static balancing fixed shaft rotate and stop several times in succession, record the position of the colored mark, if the colored mark is always directly below the axis centerline of the static balancing fixed shaft, add or remove the counterweight until the colored mark is randomly located in any direction of the axis centerline circle of the static balancing fixed shaft after the static balancing fixed shaft rotates and stops several times in succession, so as to achieve the balancing of the static balancing fixed shaft.

[0028] As a preferred solution of the static balance test method of the wind turbine rotor support of the present invention, after the balancing of the static balance fixed axis is achieved, the method further comprises:

[0029] The balanced static balance fixed shaft is installed in conjunction with the rotor bracket that needs to be subjected to the static balance test, and is hoisted onto the static balance test device for the rotor bracket of the wind turbine generator;

[0030] Start the driving cylinder so that the piston rod drives the second clutch claw to move toward the first clutch claw until the second clutch claw is engaged with the first clutch claw;

[0031] Start the drive motor. After the speed reduction and torque increase of the drive motor through the reducer, the torque is transmitted to the second clutch claw through the spline shaft, so that the second clutch claw drives the first clutch claw to rotate synchronously, and then drives the rotor bracket to rotate synchronously at 6-7r / min for 1-2min;

[0032] Switch the drive cylinder reversing valve to make the piston rod drive the second clutch claw away from the first clutch claw, so that the rotor bracket loses torque. The rotor bracket stops rotating under the wind resistance and the resistance torque of its own static imbalance. Use a marker pen to color and mark the area just below the axis of the rotor bracket.

[0033] Repeat the above operation to make the rotor support rotate and stop several times in succession, and record the position of the colored mark;

[0034] If the colored mark is randomly located in any direction of the circumference of the rotor bracket axis, it means that the rotor bracket does not have static imbalance; if the colored mark is always located directly below the rotor bracket axis, it means that the rotor bracket has static imbalance, and a counterweight block should be installed on the specified circumferential diameter directly above the rotor bracket axis;

[0035] Make the rotor bracket rotate and stop several times in succession, record the position of the colored mark, if the colored mark is always directly below the axis centerline of the static balance fixed shaft, add or remove the counterweight until the colored mark is randomly located in any direction of the circumference of the rotor bracket axis centerline after the rotor bracket rotates and stops several times in succession, so as to achieve the balancing of the rotor bracket under test.

[0036] As a preferred solution of the static balance test method of the rotor support of a wind turbine generator of the present invention, after the balancing of the rotor support to be tested is achieved, the method further comprises:

[0037] Remove the counterweight block on the tested rotor bracket, weigh the counterweight block, and obtain the static unbalance amount of the tested rotor bracket.

[0038] The beneficial effects of the present invention are:

[0039] (1) The present invention builds a rotor bracket static balance test support platform, assembles the rotor bracket with a balanced static balance fixed shaft, and horizontally contacts the free-rotating roller frames of the support platform at both ends of the shaft. The rotor bracket shaft assembly is rotated under the drive of the motor. After the reduction motor drive is cut off, the rotor bracket shaft assembly continues to rotate freely under the action of rotational inertia, and finally stops due to the reaction torque of the static imbalance of the rotor bracket, thereby determining the deviation direction of the center of mass of the rotor bracket.

[0040] (2) The present invention has created a new example of static balance test for large wind turbine rotors through the design, manufacture and use of a static balance test bench, thereby improving the performance and life of large wind turbines and increasing the margin for low wind speed operation of wind turbines. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0042] Figure 1 A schematic structural diagram of a static balance test device for a wind turbine rotor support provided by the present invention;

[0043] Figure 2 A schematic structural diagram of a static balance driving mechanism in a static balance test device for a wind turbine rotor support provided by the present invention;

[0044] Figure 3 A cross-sectional schematic diagram of a static balance drive mechanism in a static balance test device for a wind turbine rotor support provided by the present invention;

[0045] Figure 4 A schematic diagram of the structure of a roller frame in a static balance test device for a wind turbine rotor support provided by the present invention;

[0046] Figure 5 A cross-sectional schematic diagram of a roller frame in a static balance test device for a wind turbine rotor support provided by the present invention;

[0047] Among them: 1. Installation platform; 2. Support column; 3. Roller frame; 4. Static balance fixed shaft; 5. First clutch claw; 6. Second clutch claw; 7. Drive motor; 8. Primary reducer; 9. Secondary reducer; 10. Spline shaft; 11. Drive cylinder; 12. Piston rod; 13. Limit baffle; 14. Nut seat; 15. Adjusting screw; 16. Handwheel; 17. Support base plate; 18. Support plate; 19. Connecting plate; 20. Roller; 21. Cylindrical roller bearing; 22. End cover; 23. First tie rod seal; 24. First plane internal pressure seal; 25. Second plane internal pressure seal; 26. Piston seal; 27. Second tie rod seal; 28. Third plane internal pressure seal; 29. ​​Shaft retaining ring; 30. First bearing limit plate; 31. Second bearing limit plate; 32. Bearing seat. DETAILED DESCRIPTION

[0048] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific implementation modes and in combination with the accompanying drawings.

[0049] Figure 1 A schematic diagram of the structure of a static balance test device for a wind turbine rotor support provided in an embodiment of the present application. The device includes a mounting platform 1, a support column 2, a roller frame 3, a static balance fixed shaft 4, and a static balance drive mechanism. The static balance drive mechanism can drive the static balance fixed shaft 4 to rotate on the roller frame 20 for a period of time, and then remove the driving torque, so that the static balance fixed shaft 4 stops rotating under the wind resistance and the resistance torque of its own static imbalance. By observing the state of the static balance fixed shaft 4 after rotating several times and stopping, it can be judged whether the static balance fixed shaft 4 has a static imbalance phenomenon.

[0050] Specifically, the installation platform 1 is installed on the ground, and the upper end surface of the installation platform 1 is made parallel to the horizontal plane through balancing.

[0051] The support column 2 is fixedly mounted on the upper end surface of the mounting platform 1. Figure 1 There are two support columns 2, and the two support columns 2 are symmetrically arranged on the left and right sides of the upper end surface of the installation platform 1.

[0052] It should be noted that the distance between the two support columns 2 needs to be determined according to design calculations, and the upper end surfaces of the two support columns 2 are located in the same horizontal plane.

[0053] A roller frame 3 is fixedly mounted on the upper end of each support column 2; Figure 4 , Figure 5 The roller frame 3 is assembled into a roller bracket by a supporting base plate 17, a supporting plate 18, and a connecting plate 19 using hexagon socket screws; it should be noted that the two roller frames 3 are arranged at the same height.

[0054] In this embodiment, four support plates 18 are stacked and clamped once on the workbench of the machining center, while drilling, milling and boring are performed to ensure the consistency of the holes and hole distances, thereby ensuring the consistency of the height and the axis spacing of the roller 20 after assembly; the roller 20 is assembled and connected through a cylindrical roller bearing 21 and a shaft, and after 1 / 3 of the space is injected into the inner cavity with high-grade lithium-based lubricating grease, the two ends are limited by end covers 22 and fastened with hexagon socket screws; the axial limitation of the roller 20 is ensured by the shoulders of the shaft, which are respectively assembled by the support plates 18, the cylindrical roller bearings 21 and the end covers 22, so as to achieve the purpose of free rolling of the roller 20.

[0055] After the static balancing fixed shaft 4 is laid flat, its two ends are placed on two roller frames 3 respectively.

[0056] See also Figure 1 The static balancing drive mechanism is fixedly installed on the right support column 2; the static balancing drive mechanism is used to apply and remove torque to the static balancing fixed shaft 4 so as to rotate the static balancing fixed shaft 4 around its own axis; wherein, a first clutch claw 5 is fixedly provided at one end of the static balancing fixed shaft 4 facing the static balancing drive mechanism; correspondingly, the static balancing drive mechanism includes a second clutch claw 6, a translation drive assembly for driving the second clutch claw 6 to translate axially along the static balancing fixed shaft 4, and a rotation drive assembly for driving the second clutch claw 6 to rotate around its own axis; the axis of the second clutch claw 6 coincides with the axis of the first clutch claw 5.

[0057] See also Figure 2 , Figure 3In this embodiment, in the static balance drive mechanism, the second clutch claw 6 and the spline shaft 10 are connected by sliding splines; the second clutch claw 6 is guided by the splines to move axially and transmit power; the cylinder end cover 22, the cylinder piston, the cylinder, and the cylinder base are assembled into the driving cylinder 11 in the translation drive assembly by hexagon socket screws; the driving cylinder 11 uses the first tie rod seal 23, the first plane inner pressure seal 24, the second plane inner pressure seal 25, the piston seal 26, the second tie rod seal 27, and the third plane inner pressure seal 28 to form the dynamic seal and static seal of the cylinder; wherein, the second clutch claw 6 and the cylinder piston are assembled by hexagon socket screws The second clutch claw 6 is connected by screws; the cylinder piston moves left and right to drive the second clutch claw 6 to move axially along the spline shaft 10, thereby realizing the engagement and separation of the second clutch claw 6 and the first clutch claw 5; the cylinder base is fastened to the bearing seat 32 with hexagon socket screws; the spline shaft 10 is connected to the bearing seat 32 with a bearing support, and the spline shaft 10 is axially limited by the shaft retaining ring 29, the first bearing limit plate 30, the second bearing limit plate 31 and the bearing seat 32; the driving motor 7, the first reducer 8 and the second reducer 9 constitute a rotating drive assembly; the spline shaft 10 and the second reducer 9 are connected and transmit power by shaft matching and keys.

[0058] In terms of design, the dynamic seal between the cylinder piston and the cylinder base is designed to be partially lengthened in the axial direction of the cylinder piston; considering that the cylinder piston moves left and right during operation, the axial space is increased in the bearing cavity at the left end of the bearing seat 32 to ensure that the extended part of the cylinder piston has enough moving space.

[0059] Preferably, a limit baffle 13 is fixedly installed at one end of the spline shaft 10 adjacent to the second clutch claw 6. The limit baffle 13 is used to limit the axial movement range of the second clutch claw 6; see Figure 3 The cross section of the limit baffle 13 is circular, and the diameter of the circle is larger than the inner diameter of the part of the second clutch claw 6 that is sleeved on the spline shaft 10.

[0060] See also Figure 1 The upper end of the support column 2 on the left side is provided with an adjustment assembly for adjusting the horizontal position of the static balance fixed shaft 4; the adjustment assembly includes a nut seat 14 fixedly mounted on the upper end of the support column 2 and an adjustment screw 15 threadedly mounted in the nut seat 14. The axis of the adjustment screw 15 coincides with the axis of the static balance fixed shaft 4, and the right end of the adjustment screw 15 abuts against the left end of the static balance fixed shaft 4. By rotating the adjustment screw 15, the right end of the adjustment screw 15 can be translated left and right, thereby adjusting the axial position of the static balance fixed shaft 4 and the effective spacing between the first clutch claw 5 and the second clutch claw 6.

[0061] Preferably, in order to facilitate the rotation of the adjusting screw 15, a hand wheel 16 is fixedly installed at one end of the adjusting screw 15 away from the static balance fixed shaft 4. The axis of the hand wheel 16 coincides with the axis of the adjusting screw 15; the operator can drive the adjusting screw 15 to rotate synchronously by rotating the hand wheel 16.

[0062] The present application also provides a method for testing the static balance of a rotor support of a wind turbine generator, the method comprising the following steps:

[0063] Step S101: Start the driving cylinder 11, so that the piston rod 12 drives the second clutch claw 6 to move toward the first clutch claw 5, until the second clutch claw 6 is engaged with the first clutch claw 5;

[0064] Step S102: Start the drive motor 7. After the drive motor 7 is decelerated and torque increased by the reducer, the torque is transmitted to the second clutch claw 6 through the spline shaft 10, so that the second clutch claw 6 drives the first clutch claw 5 to rotate synchronously, and then drives the static balance fixed shaft 4 to rotate synchronously at 6-7r / min for 1-2min;

[0065] Step S103: Switch the reversing valve of the driving cylinder 11, so that the piston rod 12 drives the second clutch claw 6 away from the first clutch claw 5, so that the static balance fixed shaft 4 loses torque, and the static balance fixed shaft 4 stops rotating under the wind resistance and the resistance torque of its own static imbalance, and use a marker to color and mark the area directly below the axis of the static balance fixed shaft 4;

[0066] Step S104: repeat the above operation to make the static balancing fixed shaft 4 rotate and stop several times continuously, and record the position of the colored mark;

[0067] Step S105: If the colored mark is randomly located in any direction of the circumference of the axis centerline of the static balancing fixed shaft 4, it means that the static balancing fixed shaft 4 does not have a static imbalance phenomenon, and then directly proceed to step S107; if the colored mark is always located directly below the axis centerline of the static balancing fixed shaft 4, it means that the static balancing fixed shaft 4 has a static imbalance phenomenon, and then proceed to step S106;

[0068] Step S106: Install a counterweight at a position just above the axis of the static balancing fixed shaft 4, rotate the static balancing fixed shaft 4 several times in a row and stop, record the position of the color mark, if the color mark is always just below the axis of the static balancing fixed shaft 4, add or reduce the counterweight until the color mark of the static balancing fixed shaft 4 is randomly located in any direction of the axis of the static balancing fixed shaft 4 after the static balancing fixed shaft 4 rotates several times in a row and stops, so as to achieve the balancing of the static balancing fixed shaft 4;

[0069] Step S107: The trimmed static balance fixed shaft 4 is installed in coordination with the rotor bracket that needs to be subjected to a static balance test, and is hoisted onto a static balance test device for the rotor bracket of a wind turbine generator;

[0070] Step S108: starting the driving cylinder 11 so that the piston rod 12 drives the second clutch claw 6 to move toward the first clutch claw 5 until the second clutch claw 6 is engaged with the first clutch claw 5;

[0071] Step S109: start the drive motor 7. After the drive motor 7 is decelerated and torque increased by the reducer, the torque is transmitted to the second clutch claw 6 through the spline shaft 10, so that the second clutch claw 6 drives the first clutch claw 5 to rotate synchronously, and then drives the rotor bracket to rotate synchronously at 6-7r / min for 1-2min;

[0072] Step S110: Switch the reversing valve of the driving cylinder 11, so that the piston rod 12 drives the second clutch claw 6 away from the first clutch claw 5, so that the rotor bracket loses torque, and the rotor bracket stops rotating under the wind resistance and the resistance torque of its own static imbalance, and a marker is used to color and mark the area directly below the axis of the rotor bracket;

[0073] Step S111: repeat the above operation to make the rotor support rotate and stop several times continuously, and record the position of the colored mark;

[0074] Step S112: If the colored mark is randomly located in any direction of the circumference of the rotor support axis, it indicates that the rotor support does not have static imbalance, and the test ends; if the colored mark is always located directly below the rotor support axis, it indicates that the rotor support has static imbalance, and a counterweight is installed on a specified circumferential diameter directly above the rotor support axis, and the next step is performed;

[0075] Step S113: rotating the rotor bracket several times in succession and stopping, recording the position of the color mark, if the color mark is always directly below the axis centerline of the static balancing fixed shaft 4, adding or removing the counterweight block, until the color mark of the rotor bracket is randomly located in any direction of the circumference of the axis centerline of the rotor bracket after the rotor bracket rotates several times in succession and stops, so as to achieve the balancing of the tested rotor bracket;

[0076] Step S114: remove the counterweight block on the tested rotor support, weigh the counterweight block, and obtain the static unbalance amount of the tested rotor support.

[0077] The above method builds a rotor bracket static balance test support platform, assembles the rotor bracket with the balanced static balance fixed shaft 4, and the two ends of the shaft are in horizontal contact with the free rotating roller 20 frame 3 of the support platform. The rotor bracket shaft assembly is rotated under the drive of the motor. After cutting off the drive of the reduction motor, the rotor bracket shaft assembly continues to rotate freely under the action of rotational inertia, and finally stops due to the reaction torque of the static imbalance of the rotor bracket, thereby determining the deviation direction of the center of mass of the rotor bracket.

[0078] Therefore, the technical solution of the present application has created a new example of static balance test of large wind turbine rotors through the design, manufacture and use of a static balance test bench, improved the performance and life of large wind turbines, and increased the margin for low wind speed operation of wind turbines.

[0079] In addition to the above embodiments, the present invention may also have other implementation modes; any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A test method based on a static balance test device for a wind turbine rotor support, characterized in that: The test device comprises: The mounting platform (1) is arranged parallel to the horizontal plane; Two support columns (2) are provided and both are fixedly mounted on the mounting platform (1); A roller frame (3) is fixedly mounted on the support column (2), and the two roller frames (3) are of the same height; A statically balanced fixed shaft (4), both ends of which are respectively placed on the two roller frames (3); A static balancing drive mechanism, fixedly mounted on any of the support columns (2), and used for applying and removing a torque to the static balancing fixed shaft (4) so ​​as to cause the static balancing fixed shaft (4) to rotate around its own axis; A first clutch claw (5) is fixedly provided on one end of the static balancing fixed shaft (4) facing the static balancing driving mechanism; The static balancing drive mechanism comprises a second clutch claw (6), a translation drive assembly for driving the second clutch claw (6) to translate axially along the static balancing fixed shaft (4), and a rotation drive assembly for driving the second clutch claw (6) to rotate around its own axis, and the axis of the second clutch claw (6) coincides with the axis of the first clutch claw (5); The rotary drive assembly comprises a drive motor (7), a reducer connected to the drive motor (7), and a spline shaft (10) connected to the reducer; the second clutch claw (6) is coaxially sleeved on the outside of the spline shaft (10), and the spline shaft (10) is spline-connected to the second clutch claw (6); The translation drive assembly comprises a drive cylinder (11), a piston rod (12) of the drive cylinder (11) is fixedly connected to the second clutch claw (6), and a movement direction of the piston rod (12) of the drive cylinder (11) is parallel to an axial direction of the spline shaft (10); A limit baffle (13) for limiting the movement range of the second clutch claw (6) is fixedly installed on one end of the spline shaft (10) adjacent to the second clutch claw (6); an adjustment component for adjusting the horizontal position of the static balance fixed shaft (4) is arranged on the other support column (2); The adjustment assembly comprises a nut seat (14) fixedly mounted on the support column (2) and an adjustment screw (15) threadedly mounted in the nut seat (14); the axis of the adjustment screw (15) coincides with the axis of the static balancing fixed shaft (4), and one end of the adjustment screw (15) abuts against one end of the static balancing fixed shaft (4); A hand wheel (16) is fixedly mounted on one end of the adjusting screw (15) away from the static balancing fixed shaft (4), and the axis of the hand wheel (16) coincides with the axis of the adjusting screw (15); The test method comprises the following steps: Step S101: starting the driving cylinder (11) so that the piston rod (12) drives the second clutch claw (6) to move toward the first clutch claw (5) until the second clutch claw (6) is meshed with the first clutch claw (5); Step S102: starting the drive motor (7), after the drive motor (7) is decelerated and torque increased by the speed reducer, the torque is transmitted to the second clutch claw (6) through the spline shaft (10), so that the second clutch claw (6) drives the first clutch claw (5) to rotate synchronously, thereby driving the static balance fixed shaft (4) to rotate synchronously at 6-7 r / min for 1-2 minutes; Step S103: Switch the reversing valve of the driving cylinder (11) so that the piston rod (12) drives the second clutch claw (6) away from the first clutch claw (5), so that the static balancing fixed shaft (4) loses torque, and the static balancing fixed shaft (4) stops rotating under the wind resistance and the resistance torque of its own static imbalance, and a marker is used to color the area directly below the axis of the static balancing fixed shaft (4); Step S104: repeat the above operation to make the static balancing fixed shaft (4) rotate and stop several times in succession, and record the position of the colored mark; Step S105: If the colored mark is randomly located in any direction of the circumference of the axis of the statically balanced fixed shaft (4), it means that the statically balanced fixed shaft (4) does not have a static imbalance phenomenon, and then the subsequent step S107 is directly performed; if the colored mark is always located directly below the axis of the statically balanced fixed shaft (4), it means that the statically balanced fixed shaft (4) has a static imbalance phenomenon, and then the step S106 is performed; Step S106: installing a counterweight at a position directly above the axis of the static balancing fixed shaft (4), causing the static balancing fixed shaft (4) to rotate and stop for several consecutive times, recording the position of the colored mark, and if the colored mark is always directly below the axis of the static balancing fixed shaft (4), adding or removing the counterweight until the colored mark is randomly located in any direction of the axis of the static balancing fixed shaft (4) after the static balancing fixed shaft (4) rotates and stops for several consecutive times, thereby achieving balancing of the static balancing fixed shaft (4); Step S107: installing the trimmed static balancing fixed shaft (4) in coordination with the rotor bracket that needs to be subjected to a static balancing test, and hoisting it onto a static balancing test device for the rotor bracket of a wind turbine generator; Step S108: starting the driving cylinder (11) so that the piston rod (12) drives the second clutch claw (6) to move toward the first clutch claw (5) until the second clutch claw (6) is meshed with the first clutch claw (5); Step S109: starting the drive motor (7), after the drive motor (7) is decelerated and torque increased by the speed reducer, the torque is transmitted to the second clutch claw (6) through the spline shaft (10), so that the second clutch claw (6) drives the first clutch claw (5) to rotate synchronously, thereby driving the rotor bracket to rotate synchronously at 6-7 r / min for 1-2 minutes; Step S110: switching the reversing valve of the driving cylinder (11) so that the piston rod (12) drives the second clutch claw (6) away from the first clutch claw (5), so that the rotor bracket loses torque, and the rotor bracket stops rotating under the wind resistance and the resistance torque of its own static imbalance, and a marker is used to mark the area directly below the axis of the rotor bracket; Step S111: repeat the above operation to make the rotor support rotate and stop several times continuously, and record the position of the colored mark; Step S112: If the colored mark is randomly located in any direction of the circumference of the rotor support axis, it indicates that the rotor support does not have static imbalance, and the test ends; if the colored mark is always located directly below the rotor support axis, it indicates that the rotor support has static imbalance, and a counterweight is installed on a specified circumferential diameter directly above the rotor support axis, and the next step is performed; Step S113: rotating the rotor support several times and stopping, recording the position of the colored mark, and if the colored mark is always directly below the axis of the static balancing fixed shaft (4), adding or removing the counterweight until the colored mark is randomly located in any direction of the circumference of the axis of the rotor support after the rotor support rotates several times and stops, thereby achieving balancing of the rotor support under test; Step S114: remove the counterweight block on the tested rotor support, weigh the counterweight block, and obtain the static unbalance amount of the tested rotor support.

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