Offshore wind turbine hoisting equipment

Abstract

This invention relates to offshore wind turbine hoisting equipment, specifically to the field of wind turbine hoisting technology. The equipment includes a hoisting frame with a hoisting assembly for hoisting the wind turbine body. A set of clamping seats is located on one side of the hoisting frame, with the clamping seats facing each other. Each clamping seat has a semi-annular groove on its opposite surface, penetrating the top and bottom walls of the clamping seats. Several through slots are formed in each semi-annular groove, and a diameter-changing assembly is installed within each through slot to adjust the inner diameter of the clamping seats. A connecting assembly is provided between the clamping seats and the hoisting frame to allow the clamping seats to move along the horizontal width direction of the hoisting frame. A telescopic assembly is provided on the hoisting frame to allow the connecting assembly to move synchronously along the horizontal length of the hoisting frame. This invention reduces wind turbine body sway and facilitates the connection between the wind turbine body and the foundation support piles.

Description

Technical Field

[0001] This invention relates to the field of wind turbine hoisting technology, and in particular to a type of offshore wind turbine hoisting equipment. Background Technology

[0002] With the development of the wind power industry, offshore wind power has gradually become the mainstream of industry development. Currently, the installation methods for offshore wind turbines are mainly divided into two categories: split installation and integral installation. Split installation refers to transporting the various components of the wind turbine to the offshore wind farm and then installing the tower, nacelle, and blades sequentially from bottom to top on the wind turbine foundation. Integral installation, on the other hand, involves directly hoisting the entire wind turbine to the wind turbine foundation at the offshore wind farm and completing the overall hoisting operation in one go.

[0003] In the integrated installation of offshore wind turbines, the common practice is to use hoisting equipment that combines gantry cranes and steel cables. When the turbine is suspended in the air from its support, it is prone to swaying and instability due to strong winds at sea, increasing the difficulty of accurately aligning the turbine with the foundation support piles. During this alignment process, operators need to repeatedly adjust the turbine's position, reducing the efficiency of offshore wind turbine installation. Summary of the Invention

[0004] To reduce the swaying of the wind turbine body and facilitate the connection between the wind turbine body and the foundation support piles, this application provides an offshore wind turbine hoisting device.

[0005] The offshore wind turbine hoisting equipment provided in this application adopts the following technical solution:

[0006] A type of offshore wind turbine hoisting equipment includes a gantry, a hoisting assembly on which a hoisting component is mounted for hoisting the wind turbine body, a set of clamping seats on one side of the gantry, the clamping seats being arranged opposite each other, and each clamping seat having a semi-annular groove on its opposite surface, the semi-annular groove penetrating the top and bottom walls of the clamping seat, a plurality of through grooves being formed on the semi-annular grooves, a diameter-changing component being installed in the through grooves for adjusting the inner diameter of the clamping seat, a connecting component being provided between the clamping seat and the gantry, the connecting component being used to move the clamping seat along the horizontal width direction of the gantry, and a telescopic component being provided on the gantry for synchronously moving the connecting component along the horizontal length of the gantry.

[0007] By adopting the above technical solution, the hoisting assembly is connected to the wind turbine body, and the wind turbine body is moved between the clamping seats. Then, the connecting assembly adjusts the position of the clamping seats along the horizontal width direction of the hanger, so that the clamping seats abut against each other and restrict the wind turbine body within the semi-annular groove. Afterwards, the diameter-changing assembly adjusts the inner diameter of the clamping seats, so that the clamping seats abut against the wind turbine body. When installing the wind turbine body, after the hoisting assembly lifts the wind turbine body, the telescopic assembly moves the connecting assembly synchronously along the horizontal length of the hanger. The movement of the connecting assembly drives the clamping seats to move along the horizontal length direction of the hanger, and the movement of the clamping seats drives the wind turbine assembly to move along the horizontal length direction of the hanger, thereby adjusting the position of the wind turbine body along the horizontal length direction of the hanger. The connecting assembly adjusts the position of the clamping seats along the horizontal width direction of the hanger, thereby adjusting the position of the wind turbine body along the horizontal width direction of the hanger. When the annular groove formed by the semi-annular groove is coaxially set with the foundation support pile, the hoisting assembly lowers the wind turbine body. The wind turbine body descends vertically under the restriction of the diameter-changing assembly, reducing the swing of the wind turbine body and facilitating the docking of the wind turbine body with the foundation support pile.

[0008] Preferably, the lifting assembly includes a set of winches, a set of main sheaves, a set of auxiliary sheaves, and a set of lifting ropes. The winches are fixedly mounted on the hanger, and the main and auxiliary sheaves are rotatably mounted on the hanger. One of the lifting ropes is wound around one of the main sheaves and one of the auxiliary sheaves, and the other lifting rope is wound around another main sheave and another auxiliary sheave. One end of one lifting rope is connected to one of the winches, and one end of the other lifting rope is connected to the other winch. The lifting ropes are arranged in parallel, and the end of the lifting rope away from the winch is used to connect to the main body of the wind turbine.

[0009] By adopting the above technical solution, the hoisting ropes are symmetrically connected to both sides of the wind turbine body, and the wind turbine body is hoisted by winding and unwinding the hoisting ropes with a winch.

[0010] Preferably, the variable diameter assembly includes an upper rotating shaft, an upper rotating arm, an upper rotating wheel, a lower rotating shaft, a lower rotating arm, and a lower rotating wheel. The upper and lower rotating shafts are rotatably disposed within a through groove. The upper rotating shaft is located above the lower rotating shaft and is symmetrically arranged with respect to the lower rotating shaft. One end of the upper rotating arm is fixedly connected to the upper rotating shaft, and the other end of the upper rotating arm is rotatably connected to the upper rotating wheel. One end of the lower rotating arm is fixedly connected to the lower rotating shaft, and the other end of the lower rotating arm is rotatably connected to the lower rotating wheel. Both the upper and lower rotating wheels are used to abut against the main body of the fan.

[0011] By adopting the above technical solution, when the clamping seats abut against each other and restrict the fan body within the semi-annular groove, the upper rotating shaft rotates synchronously, causing the upper rotating arm to swing, so that the upper rotating wheel abuts against the side wall of the fan body. The lower rotating shaft rotates synchronously, causing the lower rotating arm to swing, so that the lower rotating wheel abuts against the side wall of the fan body, thereby achieving the effect of adjusting the inner diameter of the clamping seats and facilitating the abutment between the clamping seats and the fan body.

[0012] Preferably, the upper rotating arm includes a fixed arm and a movable arm. One end of the fixed arm is fixedly connected to the upper rotating shaft, and the other end of the fixed arm has a movable groove. One end of the movable arm is slidably disposed in the movable groove, and the other end of the movable arm is rotatably connected to the upper rotating wheel. A sliding ring groove is formed in the inner wall of the movable groove, and a sliding ring seat is slidably disposed in the sliding ring groove. The sliding ring seat is fixedly connected to the movable arm, and an abutment spring is provided between the sliding ring seat and the inner wall of the movable groove.

[0013] By adopting the above technical solution, after the lower rotor abuts against the side wall of the fan body, the abutment spring acts on the sliding ring seat, causing the upper rotor on the movable arm to abut against the side wall of the fan body.

[0014] Preferably, cavities are provided on both sides of the through groove, and these cavities are all formed within the clamping seat. One end of the upper rotating shaft and one end of the lower rotating shaft are each located in one of these cavities, and the other ends of the upper and lower rotating shafts are each located in the other cavity. Upper gears are fixedly mounted at both ends of the upper rotating shaft, and these upper gears are rotatably mounted within the cavities. Lower gears are fixedly mounted at both ends of the lower rotating shaft, and these lower gears are rotatably mounted within the cavities. Upper and lower racks are slidably mounted within each cavity. The upper rack meshes with the upper gear, and the lower rack meshes with the lower gear. The components mesh with each other. Each side of the through groove has an inner cavity, which is located within the clamping seat. The inner cavity communicates with the empty cavity. An upper slider and a lower slider are slidably arranged within the inner cavity. The upper slider is fixedly connected to an upper rack, and the lower slider is fixedly connected to a lower rack. A left rack is fixedly arranged on the upper slider, and a right rack is fixedly arranged on the lower slider. A drive gear is arranged between the left and right racks, and both the left and right racks mesh with the drive gear. A drive shaft is fixedly arranged on the drive gear, and the drive shaft is rotatably connected to the inner cavity.

[0015] By adopting the above technical solution, the rotation of the drive shaft drives the rotation of the drive gear, and the rotation of the drive gear causes the left rack and right rack to move synchronously in opposite directions. The movement of the left rack drives the upper slider to move, the movement of the upper slider drives the upper rack to move, the movement of the upper rack drives the upper gear to rotate, the rotation of the upper gear drives the upper rotating shaft to rotate, the rotation of the upper rotating shaft drives the upper rotating arm to swing, the movement of the right rack drives the lower slider to move, the movement of the lower slider drives the lower rack to move, the movement of the lower rack drives the lower gear to rotate, the rotation of the lower gear drives the lower rotating shaft to rotate, the rotation of the lower rotating shaft drives the lower rotating arm to swing, thereby achieving the effect of synchronous counter-swing of the upper and lower rotating arms, which facilitates the restriction of the main body of the fan to the center of the clamping seat.

[0016] Preferably, the outer wall of the clamping seat has an outer annular groove, and the inner wall of the outer annular groove has an inner annular groove. Both the outer and inner annular grooves penetrate the opposite surfaces of the clamping seat. A driving half-ring is rotatably disposed within the inner annular groove. A plug-in block is fixedly disposed at one end of the driving half-ring, and a plug-in groove is disposed at the other end of the driving half-ring for the plug-in block to be inserted. A rubber layer is disposed on the outer wall of the plug-in block, and a pressure sensor is disposed within the plug-in groove. A driving piston cylinder is disposed on one of the clamping seats. A pull rod is rotatably disposed on the output shaft of the driving piston cylinder. A lever is rotatably disposed on the pull rod, and the lever is fixedly connected to one of the driving half-rings. The end of the driving shaft away from the through groove penetrates the clamping seat, and a driving arm is fixedly disposed at the end of the driving shaft located within the outer annular groove. A driving through hole is formed through the driving arm, and a driving ball is rotatably disposed within the driving through hole. A driving rod is rotatably disposed between the driving ball and the driving half-ring, and the driving rods are arranged in an array along the circumferential direction on the driving half-ring.

[0017] By adopting the above technical solution, when the clamping seats abut against each other, the plug block is inserted into the plug slot, and the rubber layer on the plug block abuts against the pressure sensor. When the drive shaft is rotated, the output shaft of the drive piston cylinder moves and drives the pull rod to swing. The swing of the pull rod pulls the drive half ring connected to the lever to rotate. The rotation of the drive half ring connected to the lever pushes the other drive half ring to rotate. The synchronous rotation of the drive half ring drives the drive rod and the drive ball to revolve. The revolve of the drive ball pushes the drive arm to swing. The swing of the drive arm drives the drive shaft to rotate.

[0018] Preferably, the connecting assembly includes an upper support, a lower support, an upper connecting block, a set of upper connecting arms, a lower connecting block, and a set of lower connecting arms. Both the upper and lower supports are connected to the telescopic assembly. The upper support is located directly above the lower support. The upper and lower connecting blocks are slidably disposed between the upper and lower supports. The upper connecting block is located directly above the lower connecting block, and the upper connecting arm is located directly above the lower connecting arm. The upper and lower connecting arms are symmetrically arranged, with the upper and lower connecting arms facing each other. One end of the upper connecting block is rotatably connected to one of the upper connecting arms, and the other end is rotatably connected to another upper connecting arm. One end of the lower connecting block is rotatably connected to one of the lower connecting arms, and the other end is rotatably connected to another lower connecting arm. One end of the clamping seat is rotatably connected to one of the upper connecting arms, and the other end is rotatably connected to another upper connecting arm. One end of the clamping seat is rotatably connected to one of the lower connecting arms, and the other end is rotatably connected to another lower connecting arm.

[0019] By adopting the above technical solution, when the clamping seat moves along the horizontal width direction of the hanger, the upper connecting block and the lower connecting block move synchronously in opposite directions, causing the upper connecting arm and the lower connecting arm to swing synchronously in opposite directions, thereby enabling the upper connecting arm and the lower connecting arm to jointly drive the clamping seat to move along the horizontal width direction of the hanger.

[0020] Preferably, the connecting assembly further includes a connecting guide rod, a connecting motor, a forward lead screw, and a reverse lead screw. The top end of the connecting guide rod is connected to the upper support, and the bottom end of the connecting guide rod is connected to the lower support. The connecting motor is fixedly mounted on the upper support, and the output shaft of the connecting motor is fixedly connected to the top end of the forward lead screw. The bottom end of the forward lead screw is fixedly connected to the top end of the reverse lead screw, and the bottom end of the reverse lead screw is rotatably connected to the lower support. The connecting guide rod passes through the upper connecting block and the lower connecting block, and both the upper and lower connecting blocks are slidably connected to the connecting guide rod. The forward lead screw is threadedly connected to the upper connecting block. The reverse lead screw is threadedly connected to the lower connecting block. A set of upper telescopic tubes is provided between the bottom of the upper support and the top of the upper connecting block. One of the upper telescopic tubes is sleeved on the connecting guide rod, and the other upper telescopic tube is sleeved on the forward lead screw. A set of middle telescopic tubes is provided between the bottom of the upper connecting block and the top of the lower connecting block. One of the middle telescopic tubes is sleeved on the connecting guide rod, and the other middle telescopic tube is sleeved on both the forward and reverse lead screws. A set of lower telescopic tubes is provided between the bottom of the lower connecting block and the top of the lower support. One of the lower telescopic tubes is sleeved on the connecting guide rod, and the other lower telescopic tube is sleeved on the reverse lead screw.

[0021] By adopting the above technical solution, the connecting motor drives the forward and reverse lead screws to rotate synchronously. The synchronous rotation of the forward and reverse lead screws causes the upper and lower connecting blocks to move synchronously in opposite directions. During the movement of the upper and lower connecting blocks, the upper telescopic tube, the middle telescopic tube, and the lower telescopic tube extend and retract synchronously, thereby achieving the effect of protecting the connecting guide rod, the forward lead screw, and the reverse lead screw.

[0022] Preferably, the telescopic assembly includes an upper left guide rail, an upper left guide block, a lower left guide rail, a lower left guide block, an upper right guide rail, an upper right guide block, a lower right guide rail, a lower right guide block, an upper lifting seat, a set of upper lifting arms, a lower lifting seat, and a set of lower lifting arms. The upper left, lower left, upper right, and lower right guide rails are all fixedly mounted on the hanger. The upper left, lower left, upper right, and lower right guide rails are arranged parallel to each other. The upper left guide block is slidably mounted within the upper left guide rail, the lower left guide block is slidably mounted within the lower left guide rail, the upper right guide block is slidably mounted within the upper right guide rail, and the lower right guide block is slidably mounted within the lower right guide rail. The upper left guide block is fixedly connected to one of the upper supports, the upper right guide block is fixedly connected to the other upper support, and the lower left guide block is fixedly connected to one of the upper supports. A lower support is fixedly connected, and the lower right guide block is fixedly connected to another lower support. Both the upper and lower lifting seats are slidably connected to the hanger. A lifting assembly is provided on the hanger. The lifting assembly is used to drive the upper and lower lifting seats to slide synchronously in opposite directions. One end of the upper lifting seat is rotatably connected to one of the upper lifting arms, and the other end of the upper lifting seat is rotatably connected to another upper lifting arm. One of the upper lifting arms is rotatably connected to one of the upper supports, and the other upper lifting arm is rotatably connected to another upper support. One end of the lower lifting seat is rotatably connected to one of the lower lifting arms, and the other end of the lower lifting seat is rotatably connected to another lower lifting arm. One of the lower lifting arms is rotatably connected to one of the lower supports, and the other lower lifting arm is rotatably connected to another lower support.

[0023] By adopting the above technical solution, when the clamping seat moves along the horizontal length of the hanger, the lifting assembly drives the upper lifting seat and the lower lifting seat to move synchronously in opposite directions, causing the upper lifting arm and the lower lifting arm to swing synchronously in opposite directions. This causes the upper lifting arm to drive the upper support to move along the upper left and upper right guide rails, and the lower lifting arm to drive the lower support to move along the lower left and lower right guide rails. The synchronous movement of the upper and lower supports along the horizontal length of the hanger causes the clamping seat to move along the horizontal length of the hanger.

[0024] Preferably, the lifting assembly includes a set of lifting guide rods and a lifting piston cylinder. Both the lifting guide rods and the lifting piston cylinder are fixedly mounted on the hanger. The lifting guide rods are arranged in parallel and pass through an upper lifting seat and a lower lifting seat. Both the upper and lower lifting seats are slidably connected to the lifting guide rods. The output shaft of the lifting piston cylinder is fixedly connected to the upper lifting seat. A pulley seat is fixedly mounted at the top of the lifting guide rod. Pulley 1, Pulley 2, Pulley 3, and Pulley 4 are rotatably mounted on both sides of the pulley seat. The rotation axis of pulley 1 and the rotation axis of pulley 2 are... The rotating axis of the moving axis, the rotation axis of pulley three, and the rotation axis of pulley four are all arranged in parallel. Pulley two and pulley three are both located between pulley one and pulley four. Pulley two is located between pulley one and pulley three. Pulley three is located between pulley two and pulley four. A first steel wire rope is wound on pulley one and pulley two together. A second steel wire rope is wound on pulley three and pulley four together. One end of the first steel wire rope and one end of the second steel wire rope are both fixedly connected to the upper lifting seat. The other ends of the first steel wire rope and the other ends of the second steel wire rope are both fixedly connected to the lower lifting seat.

[0025] By adopting the above technical solution, the output shaft of the lifting piston cylinder extends and retracts, driving the upper lifting seat to rise and fall along the lifting guide rod. When the upper lifting seat rises, the distance between the upper lifting seat and the pulley seat gradually shortens, and the first and second steel wire ropes drive the lower lifting seat to fall. When the upper lifting seat falls, the distance between the upper lifting seat and the pulley seat gradually lengthens, and the first and second steel wire ropes drive the lower lifting seat to rise, achieving the effect of synchronous and opposite movement of the upper and lower lifting seats.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By setting up hangers, lifting components, clamping seats, semi-annular grooves, through grooves, diameter changing components, connecting components, and telescopic components, the wind turbine body is vertically lowered under the restriction of the diameter changing components, reducing the swaying of the wind turbine body and facilitating the connection between the wind turbine body and the foundation support piles;

[0028] 2. By setting up a cavity, upper gear, lower gear, upper rack, lower rack, upper slider, lower slider, left rack, right rack, drive gear and drive shaft, the upper and lower rotating arms can swing synchronously in opposite directions, which makes it easier to restrict the main body of the fan to the center of the clamping seat;

[0029] 3. By setting an outer ring groove, an inner ring groove, a drive half ring, a plug block, a plug groove, a rubber layer, a pressure sensor, a drive piston cylinder, a pull rod, a lever, a drive arm, a drive through hole, a drive ball, and a drive rod, the effect of making the drive shaft rotate synchronously and in the same direction can be achieved. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an offshore wind turbine hoisting device according to an embodiment of this application.

[0031] Figure 2 This is a schematic diagram illustrating the positional relationship between the main and auxiliary chucks in an embodiment of this application.

[0032] Figure 3 This is a schematic diagram illustrating the positional relationship between the clamping seat and the variable diameter assembly in the embodiments of this application.

[0033] Figure 4 This is a schematic diagram illustrating the connection between the clamping seat and the upper rotating arm in an embodiment of this application.

[0034] Figure 5 yes Figure 4 Enlarged view of part A in the middle.

[0035] Figure 6 This is a cross-sectional view of the connection relationship between the fixed arm and the movable arm in an embodiment of this application.

[0036] Figure 7 This is a schematic diagram illustrating the connection relationship between the clamping seat and the lower rotating arm in the embodiments of this application.

[0037] Figure 8 yes Figure 7 Enlarged view of section B.

[0038] Figure 9 This is a cross-sectional view illustrating the positional relationship between the clamping seat and the outer annular groove in an embodiment of this application.

[0039] Figure 10 yes Figure 9 Enlarged view of section C.

[0040] Figure 11 This is a schematic diagram illustrating the positional relationship between the drive arm and the drive ball in an embodiment of this application.

[0041] Figure 12 This is a cross-sectional view illustrating the positional relationship between the clamping seat and the drive half-ring in the embodiments of this application.

[0042] Figure 13 This is a schematic diagram illustrating the positional relationship between the upper and lower supports in the embodiments of this application.

[0043] Figure 14 This is a schematic diagram illustrating the positional relationship between the upper connecting block and the lower connecting block in an embodiment of this application.

[0044] Figure 15 This is a schematic diagram illustrating the positional relationship between the upper telescopic tube, the middle telescopic tube, and the lower telescopic tube in the embodiments of this application.

[0045] Figure 16 This is a cross-sectional view showing the positional relationship between the upper left guide rail and the lower left guide rail in the embodiments of this application.

[0046] Figure 17 This is a cross-sectional view illustrating the positional relationship between the upper right guide rail and the lower right guide rail in the embodiments of this application.

[0047] Figure 18 This is a cross-sectional view illustrating the positional relationship between the first wire rope and the second wire rope in an embodiment of this application.

[0048] Figure 19 This is a cross-sectional view illustrating the connection relationship between the upper and lower lifting seats in the embodiments of this application.

[0049] Explanation of reference numerals in the attached drawings: 1. Lifting frame; 2. Lifting assembly; 21. Winch; 22. Main sheave; 23. Auxiliary sheave; 24. Lifting rope; 3. Clamping seat; 31. Through groove; 32. Cavity; 33. Inner cavity; 34. Outer annular groove; 35. Inner annular groove; 36. Semi-annular groove; 4. Variable diameter assembly; 41. Upper rotating shaft; 42. Upper rotating arm; 421. Fixed arm; 422. Movable arm; 423. Movable groove; 424. Sliding annular groove; 425. Sliding annular seat; 426. Abutment spring; 43. Upper 44. Rotary wheel; 45. Lower rotating shaft; 46. Lower rotating arm; 47. Lower rotating wheel; 58. Connecting assembly; 59. Upper support; 50. Lower support; 51. Upper connecting block; 52. Upper connecting arm; 53. Lower connecting block; 54. Lower connecting arm; 55. Connecting guide rod; 56. Connecting motor; 57. Forward lead screw; 58. Reverse lead screw; 59. Upper telescopic tube; 59. Middle telescopic tube; 59. Lower telescopic tube; 6. Telescopic assembly; 61. Upper left guide rail; 61. Upper left guide block; 62. Lower left guide rail Guide rail; 621, lower left guide block; 63, upper right guide rail; 631, upper right guide block; 64, lower right guide rail; 641, lower right guide block; 65, upper lifting seat; 651, upper lifting arm; 66, lower lifting seat; 661, lower lifting arm; 7, lifting assembly; 71, lifting guide rod; 72, lifting piston cylinder; 73, first wire rope; 731, pulley one; 732, pulley two; 74, second wire rope; 741, pulley three; 742, pulley four; 75, pulley seat; 8, drive arm Cylinder; 81. Upper gear; 811. Upper rack; 82. Lower gear; 821. Lower rack; 83. Upper slider; 831. Left rack; 84. Lower slider; 841. Right rack; 85. Drive shaft; 851. Drive gear; 86. Drive half ring; 861. Insertion block; 862. Insertion slot; 863. Pressure sensor; 864. Rubber layer; 87. Drive arm; 871. Drive through hole; 872. Drive ball; 873. Drive rod; 88. Pull rod; 881. Lever. Detailed Implementation

[0050] The following is in conjunction with the appendix Figure 1-19 This application will be described in further detail.

[0051] This application discloses an offshore wind turbine hoisting device. (Refer to...) Figure 1 and Figure 2 The system includes a hanger 1, on which a lifting assembly 2 is mounted for lifting the wind turbine body. The lifting assembly 2 includes a set of winches 21, a set of main sheaves 22, a set of auxiliary sheaves 23, and a set of lifting ropes 24. The winches 21 are mounted on the hanger 1, and the main sheaves 22 and auxiliary sheaves 23 are rotatably mounted on the hanger 1. One lifting rope 24 is wound around one of the main sheaves 22 and one of the auxiliary sheaves 23, and another lifting rope 24 is wound around another main sheave 22 and another auxiliary sheave 23, with the ropes 24 arranged parallel to each other. One end of one lifting rope 24 is connected to one of the winches 21, and one end of the other lifting rope 24 is connected to the other winch 21. The end of the lifting rope 24 away from the winch 21 is used to connect to the wind turbine body. The lifting ropes 24 are symmetrically connected on both sides of the wind turbine body. The wind turbine body is lifted by winding and unwinding the lifting ropes 24 using the winches 21.

[0052] Reference Figure 1 and Figure 3 A set of clamping seats 3 is mounted on one side of the hanger 1. The clamping seats 3 are arranged opposite each other, and semi-annular grooves 36 are formed on the opposite surfaces of the clamping seats 3, penetrating the top and bottom walls of the clamping seats 3. Several through grooves 31 are formed on the semi-annular grooves 36, and diameter-changing components 4 are installed in the through grooves 31 to adjust the inner diameter of the clamping seats 3. A connecting component 5 is installed between the clamping seats 3 and the hanger 1 to allow the clamping seats 3 to move along the horizontal width direction of the hanger 1. A telescopic component 6 is installed on the hanger 1 to allow the connecting component 5 to move synchronously along the horizontal length of the hanger 1. The hoisting assembly is connected to the fan body, and the fan body is moved between the clamping seats 3. Then the connecting component 5 adjusts the position of the clamping seats 3 along the horizontal width direction of the hanger 1 so that the clamping seats 3 abut against each other and restrict the fan body within the semi-annular grooves 36. Then the diameter-changing component 4 adjusts the inner diameter of the clamping seats 3 so that the clamping seats 3 abut against the fan body. During the installation of the wind turbine body, after the hoisting assembly lifts the wind turbine body, the telescopic assembly 6 causes the connecting assembly 5 to move synchronously along the horizontal length of the hanger 1. The movement of the connecting assembly 5 drives the clamping seat 3 to move along the horizontal length of the hanger 1, and the movement of the clamping seat 3 drives the wind turbine assembly to move along the horizontal length of the hanger 1, thereby adjusting the position of the wind turbine body along the horizontal length of the hanger 1. The connecting assembly 5 adjusts the position of the clamping seat 3 along the horizontal width of the hanger 1, thereby adjusting the position of the wind turbine body along the horizontal width of the hanger 1. After the annular groove formed by the semi-annular groove 36 is coaxially set with the foundation support pile, the hoisting assembly lowers the wind turbine body, and the wind turbine body descends vertically under the constraint of the diameter-changing assembly 4. This reduces the swaying of the wind turbine body and facilitates the docking of the wind turbine body with the foundation support pile.

[0053] Reference Figures 3 to 7The variable diameter assembly 4 includes an upper rotating shaft 41, an upper rotating arm 42, an upper rotating wheel 43, a lower rotating shaft 44, a lower rotating arm 45, and a lower rotating wheel 46. Both the upper rotating wheel 43 and the lower rotating wheel 46 are used to abut against the main body of the fan. The upper rotating shaft 41 and the lower rotating shaft 44 are rotatably disposed within the through groove 31, with the upper rotating shaft 41 located above the lower rotating shaft 44, and the upper rotating shaft 41 and the lower rotating shaft 44 are symmetrically arranged. One end of the lower rotating arm 45 is fixedly connected to the lower rotating shaft 44, and the other end of the lower rotating arm 45 is rotatably connected to the lower rotating wheel 46. The upper rotating arm 42 includes a fixed arm 421 and a movable arm 422. One end of the fixed arm 421 is welded to the upper rotating shaft 41, and the other end of the fixed arm 421 has a movable groove 423. One end of the movable arm 422 is slidably disposed within the movable groove 423, and the other end of the movable arm 422 is rotatably connected to the upper rotating wheel 43. A sliding annular groove 424 is formed on the inner wall of the movable groove 423. A sliding annular seat 425 is slidably installed in the sliding annular groove 424. The sliding annular seat 425 is welded to the movable arm 422. An abutment spring 426 is installed between the sliding annular seat 425 and the inner wall of the movable groove 423. When the clamping seats 3 abut against each other, restricting the fan body within the semi-annular groove 36, the upper rotating shaft 41 and the lower rotating shaft 44 rotate synchronously. The rotation of the upper rotating shaft 41 causes the fixed arm 421 and the movable arm 422 to swing, and the rotation of the lower rotating shaft 44 causes the lower rotating arm 45 to swing. When the lower rotating wheel 46 abuts against the side wall of the fan body, the abutment spring 426 acts on the sliding annular seat 425, causing the upper rotating wheel 43 on the movable arm 422 to abut against the side wall of the fan body. This achieves the effect of adjusting the inner diameter of the clamping seat 3, facilitating the abutment between the clamping seat 3 and the fan body.

[0054] Reference Figures 3 to 10Both sides of the through groove 31 are provided with cavities 32, which are all opened within the clamping seat 3. One end of the upper rotating shaft 41 and one end of the lower rotating shaft 44 are located in one of the cavities 32, and the other ends of the upper rotating shaft 41 and the lower rotating shaft 44 are located in the other cavity 32. Upper gears 81 are installed at both ends of the upper rotating shaft 41 and are rotatably disposed within the cavity 32; lower gears 82 are installed at both ends of the lower rotating shaft 44 and are rotatably disposed within the cavity 32. Upper racks 811 and lower racks 821 are slidably disposed within the cavities 32, with the upper rack 811 meshing with the upper gear 81 and the lower rack 821 meshing with the lower gear 82. One side of the through groove 31 is provided with an inner cavity 33, which is opened within the clamping seat 3 and communicates with the cavity 32. An upper slider 83 and a lower slider 84 are slidably disposed within the inner cavity 33. The upper slider 83 is welded to the upper rack 811, and the lower slider 84 is welded to the lower rack 821. A left rack 831 is mounted on the upper slider 83, and a right rack 841 is mounted on the lower slider 84. A drive gear 851 is assembled between the left rack 831 and the right rack 841, and both the left rack 831 and the right rack 841 mesh with the drive gear 851. A drive shaft 85 is mounted on the drive gear 851, and the drive shaft 85 is rotatably connected to the inner cavity 33. The rotation of the drive shaft 85 drives the drive gear 851 to rotate, and the rotation of the drive gear 851 causes the left rack 831 and the right rack 841 to move synchronously in opposite directions. The movement of the left rack 831 causes the upper slider 83 to move, which in turn causes the upper rack 811 to move. The movement of the upper rack 811 causes the upper gear 81 to rotate, which in turn causes the upper rotating shaft 41 to rotate. The rotation of the upper rotating shaft 41 causes the upper rotating arm 42 to swing. The movement of the right rack 841 causes the lower slider 84 to move, which in turn causes the lower rack 821 to move. The movement of the lower rack 821 causes the lower gear 82 to rotate, which in turn causes the lower rotating shaft 44 to rotate. The rotation of the lower rotating shaft 44 causes the lower rotating arm 45 to swing. This achieves the effect of synchronous and opposite swinging of the upper rotating arm 42 and the lower rotating arm 45, which helps to confine the main body of the fan to the center of the clamping seat 3.

[0055] Reference Figures 3 to 12An outer annular groove 34 is formed on the outer wall of the clamping seat 3, and an inner annular groove 35 is formed on the inner wall of the outer annular groove 34. Both the outer annular groove 34 and the inner annular groove 35 penetrate the opposite surfaces of the clamping seat 3. A drive half-ring 86 is rotatably mounted in the inner annular groove 35. A plug-in block 861 is installed at one end of the drive half-ring 86, and a plug-in groove 862 is formed at the other end of the drive half-ring 86 for the plug-in block 861 to be inserted. The outer wall of the plug-in block 861 is covered with a rubber layer 864, and a pressure sensor 863 is installed in the plug-in groove 862. When the clamping seats 3 abut against each other, the plug-in block 861 is inserted into the plug-in groove 862, and the rubber layer 864 on the plug-in block 861 abuts against the pressure sensor 863. A drive piston cylinder 8 is mounted on one of the clamping seats 3. A pull rod 88 is rotatably mounted on the output shaft of the drive piston cylinder 8, and a lever 881 is rotatably mounted on the pull rod 88. The lever 881 is welded to one of the drive half-rings 86. One end of the drive shaft 85, away from the through slot 31, passes through the clamping seat 3. A drive arm 87 is mounted on one end of the drive shaft 85 within the outer annular groove 34. A drive through hole 871 is formed through the drive arm 87, and a drive ball 872 is rolled within the drive through hole 871. A drive rod 873 is rotatably mounted between the drive ball 872 and the drive half-ring 86, and the drive rods 873 are arranged in a circumferential array on the drive half-ring 86. When the drive shaft 85 rotates, the output shaft of the drive piston cylinder 8 moves, causing the pull rod 88 to swing. The swinging of the pull rod 88 pulls the drive half-ring 86 connected to the lever 881 to rotate, and the rotation of the drive half-ring 86 connected to the lever 881 pushes the other drive half-ring 86 to rotate. The synchronous rotation of the drive half-rings 86 causes the drive rod 873 and the drive ball 872 to revolve. The revolve of the drive ball 872 pushes the drive arm 87 to swing, and the swinging of the drive arm 87 causes the drive shaft 85 to rotate.

[0056] Reference Figures 1 to 19The connecting assembly 5 includes an upper support 51, a lower support 52, an upper connecting block 53, a set of upper connecting arms 54, a lower connecting block 55, a set of lower connecting arms 56, a connecting guide rod 57, a connecting motor 58, a forward lead screw 581, and a reverse lead screw 582. Both the upper support 51 and the lower support 52 are connected to the telescopic assembly 6, with the upper support 51 located directly above the lower support 52. The top end of the connecting guide rod 57 is connected to the upper support 51, and the bottom end of the connecting guide rod 57 is connected to the lower support 52. The connecting guide rod 57 passes through the upper connecting block 53 and the lower connecting block 55, with the upper connecting block 53 located directly above the lower connecting block 55. Both the upper connecting block 53 and the lower connecting block 55 are slidably connected to the connecting guide rod 57. A connecting motor 58 is mounted on the upper support 51. The output shaft of the connecting motor 58 is welded to the top of the forward lead screw 581, and the bottom of the forward lead screw 581 is welded to the top of the reverse lead screw 582. The bottom of the reverse lead screw 582 is rotatably connected to the lower support 52. The forward lead screw 581 is threaded to the upper connecting block 53, and the reverse lead screw 582 is threaded to the lower connecting block 55. A set of upper telescopic tubes 591 is installed between the bottom of the upper support 51 and the top of the upper connecting block 53. One upper telescopic tube 591 is sleeved on the connecting guide rod 57, and the other upper telescopic tube 591 is sleeved on the forward lead screw 581. A set of middle telescopic tubes 592 is installed between the bottom of the upper connecting block 53 and the top of the lower connecting block 55. One middle telescopic tube 592 is sleeved on the connecting guide rod 57, and the other middle telescopic tube 592 is sleeved on both the forward lead screw 581 and the reverse lead screw 582. A set of lower telescopic tubes 593 is installed between the bottom of the lower connecting block 55 and the top of the lower support 52. One lower telescopic tube 593 is sleeved on the connecting guide rod 57, and the other lower telescopic tube 593 is sleeved on the reverse lead screw 582. During the movement of the upper connecting block 53 and the lower connecting block 55, the upper telescopic tube 591, the middle telescopic tube 592, and the lower telescopic tube 593 extend and retract synchronously, achieving the effect of protecting the connecting guide rod 57, the forward lead screw 581, and the reverse lead screw 582. One end of the upper connecting block 53 is rotatably connected to one of the upper connecting arms 54, and the other end of the upper connecting block 53 is rotatably connected to another upper connecting arm 54. The upper connecting arms 54 are arranged opposite each other. One end of the lower connecting block 55 is rotatably connected to one of the lower connecting arms 56, and the other end of the lower connecting block 55 is rotatably connected to another lower connecting arm 56. The lower connecting arms 56 are arranged opposite each other. The upper connecting arm 54 is located directly above the lower connecting arm 56, and the upper connecting arm 54 and the lower connecting arm 56 are symmetrically arranged. One end of the clamping seat 3 is rotatably connected to one of the upper connecting arms 54, and the other end of the clamping seat 3 is rotatably connected to another upper connecting arm 54; one end of the clamping seat 3 is rotatably connected to one of the lower connecting arms 56, and the other end of the clamping seat 3 is rotatably connected to another lower connecting arm 56. When the clamping seat 3 moves along the horizontal width direction of the hanger 1, the connecting motor 58 drives the forward lead screw 581 and the reverse lead screw 582 to rotate synchronously. The synchronous rotation of the forward lead screw 581 and the reverse lead screw 582 causes the upper connecting block 53 and the lower connecting block 55 to move synchronously in opposite directions.The upper connecting block 53 and the lower connecting block 55 move in opposite directions in sync, causing the upper connecting arm 54 and the lower connecting arm 56 to swing in opposite directions in sync, thereby causing the upper connecting arm 54 and the lower connecting arm 56 to jointly drive the clamping seat 3 to move along the horizontal width direction of the hanger 1.

[0057] Reference Figures 1 to 19 The telescopic assembly 6 includes an upper left guide rail 61, an upper left guide block 611, a lower left guide rail 62, a lower left guide block 621, an upper right guide rail 63, an upper right guide block 631, a lower right guide rail 64, a lower right guide block 641, an upper lifting seat 65, a set of upper lifting arms 651, a lower lifting seat 66, and a set of lower lifting arms 661. The upper left guide rail 61, lower left guide rail 62, upper right guide rail 63, and lower right guide rail 64 are all mounted on the hanger 1, and are arranged parallel to each other. The upper left guide block 611 is slidably disposed within the upper left guide rail 61, the lower left guide block 621 is slidably disposed within the lower left guide rail 62, the upper right guide block 631 is slidably disposed within the upper right guide rail 63, and the lower right guide block 641 is slidably disposed within the lower right guide rail 64. The upper left guide block 611 is welded to one of the upper supports 51, and the upper right guide block 631 is welded to the other upper support 51; the lower left guide block 621 is welded to one of the lower supports 52, and the lower right guide block 641 is welded to the other lower support 52. Both the upper lifting seat 65 and the lower lifting seat 66 are slidably connected to the hanger 1. A lifting assembly 7 is installed on the hanger 1, which drives the upper lifting seat 65 and the lower lifting seat 66 to slide synchronously in opposite directions. One end of the upper lifting seat 65 is rotatably connected to one of the upper lifting arms 651, and the other end is rotatably connected to the other upper lifting arm 651. One upper lifting arm 651 is rotatably connected to one of the upper supports 51, and the other upper lifting arm 651 is rotatably connected to the other upper support 51. One end of the lower lifting seat 66 is rotatably connected to one of the lower lifting arms 661, and the other end is rotatably connected to the other lower lifting arm 661. One of the lower lifting arms 661 is rotatably connected to one of the lower supports 52, and the other lower lifting arm 661 is rotatably connected to the other lower support 52. When the clamping seat 3 moves along the horizontal length of the hanger 1, the lifting assembly 7 drives the upper lifting seat 65 and the lower lifting seat 66 to move synchronously in opposite directions, causing the upper lifting arm 651 and the lower lifting arm 661 to swing synchronously in opposite directions. This causes the upper lifting arm 651 to drive the upper support 51 to move along the upper left guide rail 61 and the upper right guide rail 63, and the lower lifting arm 661 to drive the lower support 52 to move along the lower left guide rail 62 and the lower right guide rail 64. The synchronous movement of the upper support 51 and the lower support 52 along the horizontal length of the hanger 1 causes the clamping seat 3 to move along the horizontal length of the hanger 1.

[0058] Reference Figures 1 to 19The lifting assembly 7 includes a set of lifting guide rods 71 ​​and a lifting piston cylinder 72, both of which are mounted on the hanger 1. The output shaft of the lifting piston cylinder 72 is welded to the upper lifting seat 65, and the extension and retraction of the output shaft of the lifting piston cylinder 72 drives the upper lifting seat 65 to rise and fall along the lifting guide rods 71. The lifting guide rods 71 ​​are arranged in parallel and pass through the upper lifting seat 65 and the lower lifting seat 66, both of which are slidably connected to the lifting guide rods 71. A pulley seat 75 is installed at the top of the lifting guide rod 71, and pulleys 731, 732, 741, and 742 are rotatably arranged on both sides of the pulley seat 75. The rotation axes of pulley 1 731, pulley 2 732, pulley 3 741, and pulley 4 742 are all parallel. Pulley 2 732 and pulley 3 741 are both located between pulley 1 731 and pulley 4 742, pulley 2 732 is located between pulley 1 731 and pulley 3 741, and pulley 3 741 is located between pulley 2 732 and pulley 4 742. A first steel wire rope 73 is wound on pulley 1 731 and pulley 2 732, and a second steel wire rope 74 is wound on pulley 3 741 and pulley 4 742. One end of the first steel wire rope 73 and one end of the second steel wire rope 74 are both fixedly connected to the upper lifting seat 65, and the other ends of the first steel wire rope 73 and the second steel wire rope 74 are both fixedly connected to the lower lifting seat 66. When the upper lifting seat 65 rises, the distance between the upper lifting seat 65 and the pulley seat 75 gradually shortens, and the first wire rope 73 and the second wire rope 74 drive the lower lifting seat 66 to descend; when the upper lifting seat 65 descends, the distance between the upper lifting seat 65 and the pulley seat 75 gradually lengthens, and the first wire rope 73 and the second wire rope 74 drive the lower lifting seat 66 to rise. This achieves the effect of synchronous and opposite movement of the upper lifting seat 65 and the lower lifting seat 66.

[0059] The implementation principle of an offshore wind turbine hoisting device according to an embodiment of this application is as follows: The hoisting assembly is connected to the wind turbine body, and the wind turbine body is moved between the clamping seats 3. Then, the connecting assembly 5 adjusts the position of the clamping seats 3 along the horizontal width direction of the hanger 1, so that the clamping seats 3 abut against each other and restrict the wind turbine body within the semi-annular groove 36. Afterwards, the diameter-changing assembly 4 adjusts the inner diameter of the clamping seats 3, so that the clamping seats 3 abut against the wind turbine body. When installing the wind turbine body, after the hoisting assembly lifts the wind turbine body, the telescopic assembly 6 causes the connecting assembly 5 to move synchronously along the horizontal length of the hanger 1. The movement of the connecting assembly 5 drives the clamping seats 3 to move along the horizontal length direction of the hanger 1, and the movement of the clamping seats 3 drives the wind turbine assembly to move along the horizontal length direction of the hanger 1, thereby adjusting the position of the wind turbine body along the horizontal length direction of the hanger 1. The connecting assembly 5 adjusts the position of the clamping seats 3 along the horizontal width direction of the hanger 1, thereby adjusting the position of the wind turbine body along the horizontal width direction of the hanger 1. After the annular groove 36 is coaxially set with the foundation support pile, the hoisting assembly lowers the wind turbine body. The wind turbine body descends vertically under the restriction of the diameter reducing assembly 4, which reduces the swing of the wind turbine body and facilitates the connection between the wind turbine body and the foundation support pile.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lifting device for an offshore wind turbine, comprising a jacking frame, wherein a lifting assembly is mounted on the jacking frame, the lifting assembly being used to lift the wind turbine body, characterized in that: A set of clamping seats is provided on one side of the hanger. The clamping seats are arranged opposite each other. Semi-annular grooves are formed on the opposite surfaces of the clamping seats. The semi-annular grooves penetrate the top wall and bottom wall of the clamping seats. Several through grooves are formed on the semi-annular grooves. A diameter-changing component is provided in the through grooves. The diameter-changing component is used to adjust the inner diameter of the clamping seat. A connecting component is provided between the clamping seat and the hanger. The connecting component is used to move the clamping seat along the horizontal width direction of the hanger. A telescopic component is provided on the hanger. The telescopic component is used to move the connecting component synchronously along the horizontal length of the hanger. The variable diameter assembly includes an upper rotating arm and a lower rotating arm. One end of the upper rotating arm and one end of the lower rotating arm are rotatably disposed in the through groove. A driving piston cylinder is provided on one of the clamping seats. The driving piston cylinder is used to drive the upper rotating arm and the lower rotating arm to rotate synchronously in opposite directions. The connecting assembly includes an upper support, a lower support, an upper connecting block, a set of upper connecting arms, a lower connecting block, and a set of lower connecting arms. Both the upper and lower supports are connected to the telescopic assembly. The upper support is located directly above the lower support. The upper and lower connecting blocks are slidably disposed between the upper and lower supports. The upper connecting block is located directly above the lower connecting block, and the upper connecting arm is located directly above the lower connecting arm. The upper and lower connecting arms are symmetrically arranged, with the upper and lower connecting arms facing each other. One end of the upper connecting block is rotatably connected to one of the upper connecting arms, and the other end is rotatably connected to another upper connecting arm. One end of the lower connecting block is rotatably connected to one of the lower connecting arms, and the other end is rotatably connected to another lower connecting arm. One end of the clamping seat is rotatably connected to one of the upper connecting arms, and the other end is rotatably connected to another upper connecting arm. One end of the clamping seat is rotatably connected to one of the lower connecting arms, and the other end is rotatably connected to another lower connecting arm. The connecting assembly further includes a connecting guide rod, a connecting motor, a forward lead screw, and a reverse lead screw. The top end of the connecting guide rod is connected to the upper support, and the bottom end of the connecting guide rod is connected to the lower support. The connecting motor is fixedly mounted on the upper support, and the output shaft of the connecting motor is fixedly connected to the top end of the forward lead screw. The bottom end of the forward lead screw is fixedly connected to the top end of the reverse lead screw, and the bottom end of the reverse lead screw is rotatably connected to the lower support. The connecting guide rod passes through the upper connecting block and the lower connecting block, and both the upper and lower connecting blocks are slidably connected to the connecting guide rod. The forward lead screw is threadedly connected to the upper connecting block, and the reverse lead screw... The lead screw is threadedly connected to the lower connecting block. A set of upper telescopic tubes is provided between the bottom of the upper support and the top of the upper connecting block. One of the upper telescopic tubes is sleeved on the connecting guide rod, and the other upper telescopic tube is sleeved on the forward lead screw. A set of middle telescopic tubes is provided between the bottom of the upper connecting block and the top of the lower connecting block. One of the middle telescopic tubes is sleeved on the connecting guide rod, and the other middle telescopic tube is sleeved on both the forward and reverse lead screws. A set of lower telescopic tubes is provided between the bottom of the lower connecting block and the top of the lower support. One of the lower telescopic tubes is sleeved on the connecting guide rod, and the other lower telescopic tube is sleeved on the reverse lead screw.

2. The offshore wind turbine hoisting equipment according to claim 1, characterized in that: The lifting assembly includes a set of winches, a set of main sheaves, a set of auxiliary sheaves, and a set of lifting ropes. The winches are fixedly mounted on the hanger. The main sheaves and auxiliary sheaves are rotatably mounted on the hanger. One of the lifting ropes is wound around one of the main sheaves and one of the auxiliary sheaves, and the other lifting rope is wound around another main sheave and another auxiliary sheave. One end of one lifting rope is connected to one of the winches, and one end of the other lifting rope is connected to the other winch. The lifting ropes are arranged in parallel, and the end of the lifting rope away from the winch is used to connect to the main body of the wind turbine.

3. The offshore wind turbine hoisting equipment according to claim 1, characterized in that: The variable diameter assembly also includes an upper rotating shaft, an upper rotating wheel, a lower rotating shaft, and a lower rotating wheel. The upper and lower rotating shafts are rotatably disposed in the through groove. The upper rotating shaft is located above the lower rotating shaft and is symmetrically arranged with respect to the lower rotating shaft. One end of the upper rotating arm is fixedly connected to the upper rotating shaft, and the other end of the upper rotating arm is rotatably connected to the upper rotating wheel. One end of the lower rotating arm is fixedly connected to the lower rotating shaft, and the other end of the lower rotating arm is rotatably connected to the lower rotating wheel. Both the upper and lower rotating wheels are used to abut against the main body of the fan.

4. The offshore wind turbine hoisting equipment according to claim 3, characterized in that: The upper rotating arm includes a fixed arm and a movable arm. One end of the fixed arm is fixedly connected to the upper rotating shaft, and the other end of the fixed arm has a movable groove. One end of the movable arm is slidably disposed in the movable groove, and the other end of the movable arm is rotatably connected to the upper rotating wheel. A sliding ring groove is formed in the inner wall of the movable groove, and a sliding ring seat is slidably disposed in the sliding ring groove. The sliding ring seat is fixedly connected to the movable arm, and an abutment spring is provided between the sliding ring seat and the inner wall of the movable groove.

5. The offshore wind turbine hoisting equipment according to claim 3, characterized in that: Both sides of the through groove are provided with cavities, which are all formed within the clamping seat. One end of the upper rotating shaft and one end of the lower rotating shaft are located in one of the cavities, and the other ends of the upper and lower rotating shafts are located in the other cavity. Upper gears are fixedly mounted at both ends of the upper rotating shaft, and the upper gears are rotatably mounted within the cavities. Lower gears are fixedly mounted at both ends of the lower rotating shaft, and the lower gears are rotatably mounted within the cavities. Upper and lower racks are slidably mounted within each cavity. The upper rack meshes with the upper gear, and the lower rack meshes with the lower gear. The meshing mechanism includes an inner cavity on one side of the through groove, which is located within a clamping seat and communicates with the cavity. An upper slider and a lower slider are slidably disposed within the inner cavity. The upper slider is fixedly connected to an upper rack, and the lower slider is fixedly connected to a lower rack. A left rack is fixedly disposed on the upper slider, and a right rack is fixedly disposed on the lower slider. A drive gear is disposed between the left and right racks, and both the left and right racks mesh with the drive gear. A drive shaft is fixedly disposed on the drive gear and is rotatably connected to the inner cavity.

6. The offshore wind turbine hoisting equipment according to claim 5, characterized in that: The clamping seat has an outer annular groove on its outer wall and an inner annular groove on its inner wall. Both the outer and inner annular grooves penetrate the opposite surfaces of the clamping seat. A drive half-ring is rotatably disposed within the inner annular groove. A plug-in block is fixedly disposed at one end of the drive half-ring, and a plug-in groove is disposed at the other end of the drive half-ring for the plug-in block to be inserted. A rubber layer is disposed on the outer wall of the plug-in block, and a pressure sensor is disposed within the plug-in groove. A pull rod is rotatably disposed on the output shaft of the drive piston cylinder, and a lever is rotatably disposed on the pull rod. The lever is fixedly connected to one of the drive half-rings. The end of the drive shaft away from the through groove penetrates the clamping seat, and a drive arm is fixedly disposed at the end of the drive shaft located within the outer annular groove. A drive through hole is formed through the drive arm, and a drive ball is rotatably disposed within the drive through hole. A drive rod is rotatably disposed between the drive ball and the drive half-ring, and the drive rods are arranged in an array along the circumferential direction on the drive half-ring.

7. The offshore wind turbine hoisting equipment according to claim 1, characterized in that: The telescopic assembly includes an upper left guide rail, an upper left guide block, a lower left guide rail, a lower left guide block, an upper right guide rail, an upper right guide block, a lower right guide rail, a lower right guide block, an upper lifting seat, a set of upper lifting arms, a lower lifting seat, and a set of lower lifting arms. The upper left, lower left, upper right, and lower right guide rails are all fixedly mounted on the hanger. The upper left, lower left, upper right, and lower right guide rails are arranged parallel to each other. The upper left guide block is slidably mounted within the upper left guide rail, the lower left guide block is slidably mounted within the lower left guide rail, the upper right guide block is slidably mounted within the upper right guide rail, and the lower right guide block is slidably mounted within the lower right guide rail. The upper left guide block is fixedly connected to one of the upper supports, the upper right guide block is fixedly connected to the other upper support, and the lower left guide block is fixedly connected to one of the lower supports. The support is fixedly connected, the lower right guide block is fixedly connected to another lower support, the upper lifting seat and the lower lifting seat are both slidably connected to the hanger, the hanger is provided with a lifting assembly, the lifting assembly is used to drive the upper lifting seat and the lower lifting seat to slide synchronously in opposite directions, one end of the upper lifting seat is rotatably connected to one of the upper lifting arms, the other end of the upper lifting seat is rotatably connected to another upper lifting arm, one of the upper lifting arms is rotatably connected to one of the upper supports, the other upper lifting arm is rotatably connected to another upper support, one end of the lower lifting seat is rotatably connected to one of the lower lifting arms, the other end of the lower lifting seat is rotatably connected to another lower lifting arm, one of the lower lifting arms is rotatably connected to one of the lower supports, the other lower lifting arm is rotatably connected to another lower support.

8. The offshore wind turbine hoisting equipment according to claim 7, characterized in that: The lifting assembly includes a set of lifting guide rods and a lifting piston cylinder. Both the lifting guide rods and the lifting piston cylinder are fixedly mounted on a hanger. The lifting guide rods are arranged in parallel and pass through an upper lifting seat and a lower lifting seat. Both the upper and lower lifting seats are slidably connected to the lifting guide rods. The output shaft of the lifting piston cylinder is fixedly connected to the upper lifting seat. A pulley seat is fixedly mounted at the top of the lifting guide rod. Pulley 1, Pulley 2, Pulley 3, and Pulley 4 are rotatably mounted on both sides of the pulley seat. The rotation axis of pulley 1 and the rotation axis of pulley 2 are... The rotation axes of pulley three and pulley four are both parallel. Pulley two and pulley three are both located between pulley one and pulley four. Pulley two is located between pulley one and pulley three. Pulley three is located between pulley two and pulley four. A first steel wire rope is wound on pulley one and pulley two together. A second steel wire rope is wound on pulley three and pulley four together. One end of the first steel wire rope and one end of the second steel wire rope are both fixedly connected to the upper lifting seat. The other ends of the first steel wire rope and the other ends of the second steel wire rope are both fixedly connected to the lower lifting seat.

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