Gearbox replacing device

Abstract

The utility model relates to the technical field of fan operation and maintenance, and provides a gearbox replacement device. A supporting assembly is used for being installed in a cabin of a fan; the moving mechanism is movably arranged on the supporting assembly and suitable for moving in the first direction and the second direction which are different. A supporting frame in the hoisting mechanism is fixedly arranged on a supporting assembly, a plurality of anchoring points are arranged on one side of the supporting frame, and a plurality of guiding positions are arranged on the other side, opposite to the side, of the supporting frame. The plurality of pulley assemblies are fixedly arranged on the moving mechanism; the plurality of lifting appliance assemblies and the pulley assemblies are arranged in a one-to-one correspondence manner; the multiple driving assemblies are installed at preset installation positions in the fan, and traction pieces led out of the driving assemblies are sequentially wound around the corresponding guide positions, the corresponding pulley assemblies and the corresponding lifting appliance assemblies and fixed to the corresponding anchoring points of the corresponding guide positions, the corresponding pulley assemblies and the corresponding lifting appliance assemblies. The gear box replacing device can replace large hoisting equipment to replace the gear box in a fan cabin, the lease cost of a large-tonnage crane is saved, the operation and maintenance cost of a fan is effectively reduced, and the replacement efficiency of the gear box is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine operation and maintenance technology, and in particular to a gearbox replacement device. Background Technology

[0002] The gearbox is the core transmission component of a wind turbine generator set (referred to as a "wind turbine"). Its main function is to increase the speed of the low-speed rotational kinetic energy captured by the wind turbine and transfer it to the generator, enabling it to reach the speed required for power generation. It is the power bridge connecting the wind turbine and the generator. The performance of the gearbox directly affects the power generation efficiency and reliability of the wind turbine. Therefore, in the wind power field, gearbox replacement is an important part of wind turbine maintenance.

[0003] Currently, most existing gearbox replacement methods involve using a crane to lift the faulty gearbox to the replacement location, and then hoisting the new gearbox onto the nacelle for replacement. This method relies heavily on external cranes, requiring the crane to be driven near the nacelle. Due to limitations imposed by the surrounding space (such as mountains, wilderness, beaches, and islands), weather conditions (unpredictable winds with varying directions and loads, and the impact of strong gusts), ground load-bearing capacity (the crane needs to be on a level surface), long preparation time, and high costs (crane rental and operator fees), the existing gearbox replacement method results in high wind turbine maintenance costs. Furthermore, in offshore environments, large-tonnage cranes lack sufficient platform support, limiting their use. Utility Model Content

[0004] This utility model provides a gearbox replacement device to solve the above-mentioned technical defects in the prior art. It can replace large lifting equipment to replace the gearbox in the wind turbine nacelle, save the cost of renting large-tonnage cranes, effectively reduce the wind turbine operation and maintenance cost, and improve the gearbox replacement efficiency.

[0005] This utility model provides a gearbox replacement device, comprising:

[0006] Support components for installation inside the wind turbine nacelle;

[0007] A movable mechanism is movably disposed on the support assembly and adapted to move along a first direction and a second direction, wherein the first direction and the second direction are different;

[0008] Lifting mechanism, including:

[0009] A support frame is fixedly mounted on the support assembly. One side of the support frame has multiple anchor points, and the other side of the support frame opposite to one side has multiple guide positions.

[0010] Multiple pulley assemblies are fixedly mounted on the moving mechanism;

[0011] Multiple lifting assemblies are located below the pulley assembly and are arranged in a one-to-one correspondence with the pulley assembly;

[0012] Multiple drive components are installed in preset installation positions inside the wind turbine. The traction element led out by each drive component is sequentially wound around the corresponding guide position, the corresponding pulley assembly and the corresponding lifting assembly, and fixed to the corresponding anchor point.

[0013] According to the gearbox replacement device provided by this utility model, each pulley assembly includes at least two fixed pulleys, the at least two fixed pulleys are coaxially arranged, and the hub size of each fixed pulley is equal;

[0014] The traction member, guided by the guide position, is sequentially wound around one of the at least two fixed pulleys, the lifting device assembly, and the other of the at least two fixed pulleys, and fixed to the corresponding anchor point.

[0015] According to the gearbox replacement device provided by this utility model, each of the lifting device assemblies includes:

[0016] The lifting device housing has an internal cavity.

[0017] A movable pulley is rotatably disposed in the receiving cavity, and the hub size of the movable pulley is equal to the hub size of the fixed pulley;

[0018] The lifting component is mounted on the housing of the lifting device;

[0019] The traction member, guided by the guide position, is sequentially wound around one of the at least two fixed pulleys, the movable pulley, and the other of the at least two fixed pulleys, and fixed to the corresponding anchor point.

[0020] According to the gearbox replacement device provided by this utility model, each of the guide positions is provided with a first guide pulley, a second guide pulley and a third guide pulley;

[0021] The first guide pulley and the second guide pulley are spaced apart on the support assembly, and the first guide pulley and the second guide pulley are offset in the vertical direction, and the axes of the first guide pulley and the second guide pulley are parallel;

[0022] The third guide pulley is disposed on the support frame and corresponds to the position of the second guide pulley;

[0023] The traction component extending from the drive assembly is sequentially wound around the first guide pulley, the second guide pulley, and the third guide pulley, as well as the corresponding pulley assembly and lifting device assembly, and fixed to the corresponding anchor point.

[0024] According to the gearbox replacement device provided by this utility model, the moving mechanism includes:

[0025] A first movable component is movably disposed on the support component and adapted to move along a first direction;

[0026] The second moving component is movably disposed on the first moving component and adapted to move along a second direction, wherein the first direction and the second direction are perpendicular to each other;

[0027] The plurality of pulley assemblies are respectively fixedly mounted on the second movable assembly.

[0028] According to the gearbox replacement device provided by this utility model, the first movable component includes:

[0029] Two first mobile carriers spaced apart are connected by a first connecting beam. Each first mobile carrier is provided with at least one first guide near both ends, and each first guide is movably engaged with the support assembly.

[0030] A first driving component is disposed on the support assembly and connected to at least one of the two first moving carriers, for driving the two first moving carriers to move linearly along a first direction.

[0031] According to the gearbox replacement device provided by this utility model, the second movable component includes:

[0032] Two second mobile carriers are spaced apart and connected by a second connecting beam. Each second mobile carrier is provided with at least one second guide near both ends, and each second guide is movably engaged with the first mobile carrier.

[0033] The second driving component is disposed on the first moving carrier and connected to at least one of the two second moving carriers, for driving the two second moving carriers to move linearly along the second direction.

[0034] According to the gearbox replacement device provided by this utility model, each of the first guide members includes a roller or a slider; the surface of the support assembly is provided with a slide rail that movably cooperates with the roller or the slider;

[0035] And / or,

[0036] Each of the second guide members includes a roller or a slider; the surface of the first moving carrier is provided with a slide rail that movably engages with the roller or the slider.

[0037] According to the gearbox replacement device provided by this utility model, the support assembly includes:

[0038] Multiple foundation columns are used for installation into the nacelle of the wind turbine;

[0039] Rigid frame structures, including:

[0040] Two secondary beams, each of which is supported on the two foundation columns;

[0041] Multiple supporting columns are arranged in a one-to-one correspondence with the positions of the foundation columns, and each supporting column is connected to the side of the secondary crossbeam away from the foundation column.

[0042] Two main crossbeams, each of which is mounted on the two supporting columns;

[0043] The main longitudinal beams are spaced apart between the two main transverse beams and are perpendicularly connected to each of the main transverse beams;

[0044] The strut has one end movably connected to the main crossbeam and the other end connected to the support column;

[0045] The movable mechanism is movably mounted on the surface of the main crossbeam.

[0046] According to the gearbox replacement device provided by this utility model, the support frame includes:

[0047] Multiple additional columns are respectively installed on the main longitudinal beam;

[0048] Two additional crossbeams are arranged opposite each other, and each of the additional crossbeams is provided on two additional columns that are spaced apart in the transverse direction;

[0049] Two additional longitudinal beams are arranged opposite each other, and each additional longitudinal beam is provided on two additional columns spaced apart along the longitudinal direction;

[0050] Multiple anchor points are located on one of the additional longitudinal beams, and some of the guide positions are located on another additional longitudinal beam.

[0051] The gearbox replacement device provided by this utility model comprises a support assembly, a moving mechanism, and a lifting mechanism. The lifting mechanism includes a support frame, multiple pulley assemblies, multiple lifting attachment assemblies, and multiple drive assemblies. Each drive assembly's traction component is sequentially wound around a corresponding guide position, a corresponding pulley assembly, and a corresponding lifting attachment assembly, and fixed to its corresponding anchor point. When a gearbox needs replacement, the moving mechanism drives the pulley assembly to move directly above the gearbox to be replaced. The drive assembly then activates, releasing the traction component (wire rope), and the lifting attachment assembly descends to the gearbox lifting lug position and locks. The drive assembly reverses the winding of the wire rope, using the force amplification effect of the pulley assembly to lift the gearbox at a uniform speed. The moving mechanism then adjusts the position, moving the gearbox horizontally to a disassembly position outside the nacelle. This configuration allows the gearbox replacement device to replace gearboxes inside the wind turbine nacelle, replacing the need for large-tonnage crane rentals, effectively reducing wind turbine operation and maintenance costs, and improving gearbox replacement efficiency.

[0052] Since wind turbine nacelles are typically located at the top of the tower, where the surrounding space is narrow, cranes need to be parked close to the tower. However, due to limitations imposed by the tower foundation's load-bearing capacity and the safety distance around the nacelle, as well as the high wind speeds at sea or high altitudes and the low temperatures in winter causing the hydraulic oil to become viscous, the external environment directly affects the feasibility of hoisting. The rental cost of large-tonnage cranes is also high. In contrast, this utility model embodiment combines a support component, a moving mechanism, and a hoisting mechanism to form a gearbox replacement device, which eliminates the need for large lifting equipment when replacing gearboxes inside the wind turbine nacelle, reducing equipment purchase costs and lowering transportation and storage costs.

[0053] Furthermore, the support components are directly fixed to the pre-reserved installation positions in the nacelle, relying on the nacelle itself for lifting support, avoiding the ground load issues associated with external cranes. The moving mechanism adapts to the nacelle space, moving along the X / Y axes inside the nacelle to cover all gearbox locations, with its movement path unrestricted by external obstacles. The traction force transmission path is closed, meaning the traction component sequentially passes through the guide position (constraint path), pulley assembly (changing direction), and lifting device assembly (clamping the load), all completed within the nacelle, unaffected by external wind speed or ground vibrations. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the gearbox replacement device provided in an embodiment of the present invention.

[0056] Figure 2 This is one of the partial structural schematic diagrams of the gearbox replacement device provided in this utility model embodiment (the main body embodies the pulley assembly).

[0057] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0058] Figure 4 This is a second partial structural schematic diagram of the gearbox replacement device provided in this embodiment of the utility model (mainly showing the moving mechanism).

[0059] Figure 5 This is the third partial structural schematic diagram of the gearbox replacement device provided in this embodiment of the utility model (mainly showing the first moving component).

[0060] Figure 6 This is a schematic diagram of the structure of the support component in the gearbox replacement device provided in this embodiment of the utility model.

[0061] Figure label:

[0062] 10. Support components; 11. Foundation columns; 12. Rigid frame structure; 121. Secondary crossbeams; 122. Support columns; 123. Main crossbeams; 124. Main longitudinal beams; 125. Stirrups;

[0063] 20. Moving mechanism; 21. First moving component; 211. First moving carrier; 212. First connecting beam; 213. First driving component; 214. First guide component; 22. Second moving component; 221. Second moving carrier; 222. Second connecting beam; 223. Second driving component; 224. Second guide component;

[0064] 30. Lifting mechanism; 31. Support frame; 311. Additional column; 312. Additional crossbeam; 313. Additional longitudinal beam; 32. Pulley assembly; 321. First fixed pulley; 322. Second fixed pulley; 33. Lifting device assembly; 331. Lifting device housing; 332. Receiving cavity; 333. Movable pulley; 334. Lifting component; 34. Drive assembly; 341. Traction component;

[0065] 40. Anchor point; 50. Guide position; 51. First guide pulley; 52. Second guide pulley; 53. Third guide pulley; 60. Frame. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0067] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0068] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] Figure 1 This is a schematic diagram of the gearbox replacement device provided in an embodiment of the present invention. Figure 2 This is one of the partial structural schematic diagrams of the gearbox replacement device provided in this utility model embodiment (the main body embodies the pulley assembly). Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0071] See Figures 1 to 3 This utility model provides a gearbox replacement device, which is mounted on a frame 60 inside the wind turbine nacelle. It is used to replace the gearbox inside the wind turbine nacelle and can also be extended to the hoisting and replacement of large components such as blade clamps and yaw bearings. The gearbox replacement device includes a support assembly 10, a moving mechanism 20, and a hoisting mechanism 30.

[0072] The support assembly 10 is used to install onto the frame 60 inside the nacelle of the wind turbine. The support assembly 10 is a basic load-bearing structure, usually using a high-strength metal frame (such as a rectangular frame welded from steel). The bottom of the support assembly 10 is provided with a flange that matches the reserved installation position on the frame 60 inside the wind turbine nacelle. The flange is provided with bolt holes, and it is fixed to the inside of the nacelle by detachable connections such as bolts.

[0073] The moving mechanism 20 is movably mounted on the support assembly 10 and is adapted to move along a first direction and a second direction, which are different from each other. Essentially, the moving mechanism 20 is a two-dimensional moving platform composed of two sets of linear modules. One set of linear modules is mounted on the top of the support assembly 10 along the X-axis (first direction); the other set of linear modules is mounted on the linear module moving along the Y-axis (second direction). The moving mechanism 20 is equipped with a bracket for fixing the pulley assembly 32 of the hoisting mechanism 30, ensuring that the pulley assembly 32 can move flexibly with the moving mechanism 20 within the cabin to directly above the gearbox or the target hoisting position.

[0074] The hoisting mechanism 30 is the core execution component, specifically including a support frame 31, multiple pulley assemblies 32, multiple lifting tool assemblies 33, and multiple drive assemblies 34.

[0075] The support frame 31 can be a three-dimensional frame welded from H-beams. The support frame 31 is fixed to the top of the support assembly 10 (i.e., near the cabin ceiling). Multiple anchor points 40 are evenly distributed on one side of the support frame 31 (e.g., the right side). Each anchor point 40 can be a high-strength bolt hole, and the number of anchor points 40 is 4 to 6, determined by the number of traction components 341. The anchor points 40 are used to fix the ends of the traction components 341. On the other side of the support frame 31 (e.g., the left side), multiple guide positions 50 are provided. Each guide position 50 can be a steel guide groove or a guide pulley. The number of guide positions 50 is also consistent with the number of traction components 341. If there are 4 traction components 341, there are four sets of guide positions 50. The guide positions 50 are used to constrain the movement path of the traction components 341, preventing deviation or entanglement.

[0076] Multiple pulley assemblies 32 are fixedly mounted on the moving mechanism 20. Each pulley assembly 32 includes 2 to 3 fixed pulleys. Each pulley assembly 32 is fixed to the platform of the moving mechanism 20 near the four corners by a bracket. The pulley shaft of the fixed pulley in each pulley assembly 32 is connected to the bracket by a bearing to ensure flexible rotation.

[0077] Multiple lifting assemblies 33 are located below pulley assemblies 32 and are arranged one-to-one with pulley assemblies 32. When the moving mechanism 20 is driven, the pulley assemblies 32 move synchronously with the platform, ensuring that the traction member 341 remains taut during movement. Each lifting assembly 33 is connected to the pulley assembly 32 via the traction member 341 (wire rope or chain). The bottom of the lifting assembly 33 is equipped with a lifting component 334 that matches the lifting lug of the gearbox. The lifting component 334 engages with the lifting lug of the gearbox to ensure that the gearbox remains stably clamped during lifting. The lifting component 334, provided that safety and performance requirements are met, includes, but is not limited to, hooks, lifting straps, and chain slings.

[0078] Multiple drive components 34 are installed at preset installation positions inside the wind turbine. These preset installation positions can be the bottom platform or the top beam of the nacelle, etc. The drive components 34 can be electric hoists or hydraulic winches. Two or four drive components 34 can be installed, and the number of drive components 34 matches the number of lifting points on the gearbox. Each drive component 34 leads out a traction member 341 (steel wire rope or chain). The traction member 341 is sequentially wound around the corresponding guide position 50, the corresponding pulley assembly 32, and the corresponding lifting device assembly 33, and fixed to the corresponding anchor point 40. In other words, the lifting device assembly 33 is connected to the pulley assembly 32 through the traction member 341 (steel wire rope or chain). After passing through the guide position 50, the traction member 341 enters one of the pulleys in the pulley assembly 32, exits from the pulley assembly 32, passes through the lifting device assembly 33, and after passing through another pulley in the pulley assembly 32, it is fixed to the anchor point 40, forming a complete force transmission path.

[0079] When it is necessary to replace components inside the wind turbine nacelle, such as the gearbox, the moving mechanism 20, driven by the X / Y axes, moves the lifting assembly 33 to the lifting point position of the gearbox to be replaced. The drive assembly 34 is activated, releasing the traction component 341 (wire rope), and the lifting assembly 33 descends to the gearbox lifting lug position and locks. The drive assembly 34 reverses the winding of the wire rope, and through the force amplification effect (effort-saving effect) of the pulley assembly 32, the gearbox is lifted at a uniform speed. The moving mechanism 20 adjusts the position and moves the gearbox to the disassembly position outside the nacelle (or the installation position of the new gearbox). The lifting of the new gearbox is completed by repeating the above steps.

[0080] It is understood that the gearbox replacement device provided in this embodiment of the present invention, by setting up a support assembly 10, a moving mechanism 20, and a hoisting mechanism 30, and making the hoisting mechanism 30 include a support frame 31, multiple pulley assemblies 32, multiple lifting assemblies 33, and multiple drive assemblies 34, with each drive assembly 34 extending a traction member 341 sequentially wound around a corresponding guide position 50, a corresponding pulley assembly 32, and a corresponding lifting assembly 33, and fixed to a corresponding anchor point 40. When the gearbox needs to be replaced, the moving mechanism 20 drives the pulley assembly 32 to move directly above the gearbox to be replaced, the drive assembly 34 starts, releases the traction member 341 (steel wire rope), and the lifting assembly 33 descends to the gearbox lifting lug position and locks. The drive assembly 34 reverses the winding of the steel wire rope, and the gearbox is lifted at a uniform speed through the force amplification effect of the pulley assembly 32. The moving mechanism 20 adjusts the position and moves the gearbox to the disassembly position outside the engine compartment. This setup fully utilizes the structural advantages of the wind turbine nacelle itself. Built inside the nacelle, the gearbox replacement device can replace large lifting equipment for gearbox replacement, saving on large-tonnage crane rental costs and being unaffected by natural environmental factors. This improves the unfavorable conditions for gearbox replacement, effectively reducing wind turbine operation and maintenance costs and increasing gearbox replacement efficiency.

[0081] Since wind turbine nacelles are typically located at the top of the tower (80-120 meters high), the surrounding space is narrow, and cranes need to be parked close to the tower. This is limited by the tower foundation's load-bearing capacity (the crane outrigger pressure may exceed the foundation's design value) and the safety distance around the nacelle (to avoid the boom colliding with the nacelle). Additionally, the high wind speeds at sea or high altitudes (cranes cannot operate when the wind speed is ≥6) and the low temperatures in winter causing the hydraulic oil to become viscous (causing the crane to jam), the external environment directly affects the feasibility of lifting. The rental cost of large-tonnage cranes is also high. However, this utility model embodiment uses a combination of support component 10, moving mechanism 20, and lifting mechanism 30 to form a gearbox replacement device, so that the replacement of gearboxes in the wind turbine nacelle no longer relies on large lifting equipment, reducing equipment purchase costs and lowering transportation and storage costs.

[0082] Furthermore, the support component 10 is directly fixed to the pre-reserved installation position in the nacelle, relying on the nacelle itself, without the need for additional foundation construction. It utilizes the nacelle's own rigidity as a lifting support, avoiding ground load issues for external cranes. The moving mechanism 20 adapts to the nacelle space, moving along the X / Y axes inside the nacelle, covering all gearbox positions, and its movement path is not restricted by external obstacles. The traction force transmission path is closed, meaning the traction component 341 sequentially passes through the guide position 50 (constraint path), pulley assembly 32 (changing direction), and lifting device assembly 33 (clamping the load), all completed inside the nacelle, unaffected by external wind speed or ground vibration. The start, stop, and speed of the drive component 34, composed of an electric hoist or hydraulic winch, can be precisely controlled by a PLC, avoiding load swaying caused by operational errors in traditional cranes.

[0083] Continue reading Figure 2 and Figure 3 In some embodiments of this utility model, each pulley assembly 32 includes at least two fixed pulleys, which are coaxially arranged, and the hub sizes of each fixed pulley are equal. For example, the pulley assembly 32 adopts a double fixed pulley configuration, that is, the pulley assembly 32 includes a first fixed pulley 321 and a second fixed pulley 322. Both the first fixed pulley 321 and the second fixed pulley 322 can be cast from 45# steel and strengthened by surface heat treatment. The first fixed pulley 321 and the second fixed pulley 322 are coaxially arranged, and the hub sizes of the first fixed pulley 321 and the second fixed pulley 322 are equal.

[0084] Essentially, the two fixed pulleys are connected by a through shaft, with self-aligning roller bearings installed at both ends of the shaft. The bearing housings are bolted to the platform frame of the moving mechanism 20. A sealing ring is installed between the bearing housings and the through shaft to prevent dust from entering.

[0085] The traction member 341, guided by the guide position 50, is sequentially wound around the first fixed pulley 321, the lifting device assembly 33, and the second fixed pulley 322, and fixed to the corresponding anchor point 40. Essentially, the winding path of the traction member 341 is as follows: After being drawn out from the drive assembly 34 (winch), the traction member 341 (wire rope) extends to the guide position 50, then extends horizontally to the first fixed pulley 321 of the pulley assembly 32, and passes around the bottom (lower side of the wheel groove) of the first fixed pulley 321, descending into the lifting area. The traction member 341 connects to the lifting device assembly 33. After the lifting device assembly 33 clamps the gearbox lifting lug, the traction member 341 continues upward, passing around the top (upper side of the wheel groove) of the second fixed pulley 322, extending towards the anchor point 40. Its end is fixed to the anchor point 40 of the support frame 31 by a shackle or similar means.

[0086] Essentially, the traction component 341 sequentially winds around the first fixed pulley 321 (downward), the lifting assembly 33 (vertical), and the second fixed pulley 322 (upward) to the anchor point 40 (fixed). The structure in the lifting assembly 33 for winding the wire rope can be a roller or pulley with a rope groove, making the winding path symmetrically distributed in a "V" shape. This ensures that the wrap angle of the wire rope on the pulley (i.e., the arc of the wire rope contacting the pulley) is uniform, avoiding wire rope breakage caused by local stress concentration. At the same time, the symmetrical winding path reduces the space requirements of the nacelle (no need to reserve a large-diameter guide groove), making it suitable for compact nacelle designs (such as miniaturized nacelles for offshore wind turbines).

[0087] Traditional single fixed pulleys can only change the direction of force and cannot save effort (tension = load); however, the pulley assembly 32 provided in this embodiment of the invention has at least two fixed pulleys corresponding to the lifting assembly 33 (one movable pulley), that is, it can be two or three fixed pulleys, that is, the number of fixed pulleys in the pulley assembly 32 is at least twice that of one movable pulley in the lifting assembly 33. Effort saving is achieved by distributing the load through multiple traction members 341 (wire ropes), and the effort saving ratio is equal to the number of wire rope segments (n) bearing the load, then:

[0088] F = G / n, where F is the tension in the wire rope and G is the weight of the gearbox.

[0089] For example, the winding path of the traction member 341 in this embodiment of the present invention forms three effective load-bearing ropes, as shown below:

[0090] The wire rope extending from the drive assembly 34, which is composed of a winch, goes to the first fixed pulley 321 (this section of the wire rope does not directly bear weight). After passing over the first fixed pulley 321, the wire rope from the first fixed pulley 321 to the lifting device assembly 33 (this section of the wire rope is the first load-bearing section). The wire rope passing through the lifting device assembly 33 to the second fixed pulley 322 (this section of the wire rope is the second load-bearing section). After passing over the second fixed pulley 322, the wire rope from the second fixed pulley 322 to the anchor point 40 (this section of the wire rope is the third load-bearing section).

[0091] In this embodiment of the utility model, since the pulley assembly 32 adopts a coaxial double fixed pulley, the traction member 341 passes through the two fixed pulleys in sequence, and the final effective load-bearing rope segment is three segments. Therefore, the force-saving ratio is 3:1, that is, the drive assembly 34 only needs to provide a pulling force of G / 3 to lift the gearbox at a constant speed (for example, when the gearbox weighs 15 tons, the drive assembly 34 only needs a rated load of 5 tons).

[0092] Therefore, it can be seen that the present invention adopts a pulley assembly 32 composed of coaxial double fixed pulleys and sets a specific winding path for the traction member 341. By utilizing the mechanical characteristics of the pulley assembly 32, effort is saved, thereby improving the gearbox replacement efficiency.

[0093] Furthermore, the synchronous rotation of the pulley assembly 32, composed of two coaxial fixed pulleys, avoids unilateral wear of the pulley groove and wire rope caused by uneven loading of a single fixed pulley, thus making the hoisting process smoother. At the same time, the equal hub size ensures that the rotational inertia of the two fixed pulleys is consistent, resulting in uniform torque demand during startup and reducing the peak power consumption of the drive assembly 34.

[0094] Continue reading Figure 2 and Figure 3 In some embodiments of this utility model, each lifting device assembly 33 includes a lifting device housing 331, a movable pulley 333, and a lifting component 334.

[0095] The lifting device housing 331 can be a rectangular box made of welded steel plates. The internal structure of the lifting device housing 331 has a receiving cavity 332. Bearing mounting holes are provided on both sides of the lifting device housing 331 for fixing the rotating shaft of the movable pulley 333. The bottom of the lifting device housing 331 is provided with a mounting plate for the lifting component 334. The mounting plate for the lifting component 334 is fixed to the lifting component 334 by high-strength bolts.

[0096] The movable pulley 333 can be a cylindrical cast steel pulley. It is located in the receiving cavity 332 and mounted in the bearing mounting hole of the lifting device housing 331 via self-aligning roller bearings. Both ends of the rotating shaft are fixed by elastic retaining rings to prevent axial movement. The hub size of the movable pulley 333 is equal to the hub size of the first fixed pulley 321 and the second fixed pulley 322 described above.

[0097] The lifting component 334 is mounted on the lifting housing 331. The lifting component 334 can be made of forged alloy steel hook with a double-back hook structure. The hook body is bolted to the mounting plate of the lifting component 334 at the bottom of the lifting housing 331 to ensure uniform force during lifting.

[0098] The traction member 341, guided by the guide position 50, is sequentially wound around the first fixed pulley 321, the movable pulley 333, and the second fixed pulley 322, and fixed to the corresponding anchor point 40.

[0099] Essentially, the winding path of the traction component 341 is as follows: The steel wire rope leading from the output end of the drive assembly 34 extends horizontally to the bottom groove of the first fixed pulley 321. After passing over the first fixed pulley 321, the steel wire rope enters downward into the receiving cavity 332 of the lifting device assembly 33, passes over the movable pulley 333 (at this time, due to the load, the steel wire rope is tightly fitted with the groove of the movable pulley 333), and exits from the bottom of the movable pulley 333, passes upward over the top groove of the second fixed pulley 322, and the end of the steel wire rope is fixed to the anchor point 40 of the support frame 31 by a shackle or the like. That is, the traction component 341 sequentially passes through the first fixed pulley 321 (fixed), the movable pulley 333 (movable), and the second fixed pulley 322 (fixed), and is finally fixed at the anchor point 40.

[0100] It is understood that in this embodiment of the invention, the hub size of the movable pulley 333 is equal to the hub size of the first fixed pulley 321 and the second fixed pulley 322, so that the traction member 341 is symmetrically distributed in a "U" shape along its winding path (from the first fixed pulley 321 to the movable pulley 333 to the second fixed pulley 322). The contact stress of the wire rope on each pulley is evenly distributed, and the tension direction of the drive component 34 is consistent with the direction of the load gravity (vertical direction), which can reduce the additional energy consumption caused by the horizontal component force. At the same time, the rotational inertia of the movable pulley 333 is matched with that of the two fixed pulleys, the vibration amplitude of the wire rope is small, the hoisting positioning accuracy is improved, and there is no need to adjust the position multiple times.

[0101] Since the hub size of the two fixed pulleys is the same as that of the movable pulley 333, and the moment of inertia of the movable pulley 333 matches that of the two fixed pulleys, the three rotate synchronously during movement. This avoids wear on one side of the groove and wire rope caused by uneven load on a single fixed pulley. The wrap angle of the wire rope on the pulley (the arc of contact with the pulley) is uniform, avoiding the risk of wire rope breakage caused by local stress concentration.

[0102] Continue reading Figure 2 In some embodiments of this utility model, each guide position 50 is provided with a first guide pulley 51, a second guide pulley 52 and a third guide pulley 53.

[0103] Both the first guide pulley 51 and the second guide pulley 52 can be cylindrical cast steel pulleys, and are spaced apart on the support assembly 10. Furthermore, the first guide pulley 51 and the second guide pulley 52 are vertically offset, meaning the first guide pulley 51 is installed on one side and the second guide pulley 52 is installed on the other side, with their axes parallel.

[0104] The third guide pulley 53 is located on the support frame 31 and corresponds to the position of the second guide pulley 52. ​​That is, the third guide pulley 53 and the second guide pulley 52 are aligned in the vertical direction. The structure is the same as that of the first guide pulley 51 and the second guide pulley 52, and they are also fixed by bearing seats.

[0105] The traction member 341, extending from the drive assembly 34, is sequentially wound around the first guide pulley 51, the second guide pulley 52, and the third guide pulley 53, as well as the corresponding pulley assemblies 32 (first fixed pulley 321 and second fixed pulley 322) and the lifting assembly 33 (movable pulley 333), and fixed to the corresponding anchor point 40. In other words, the winding path of the traction member 341 (high-strength steel wire rope) is as follows:

[0106] A wire rope is led out from the output end of the drive assembly 34, extends vertically upward to the first guide pulley 51, passes around the first guide pulley 51, extends horizontally along the Y-axis to the second guide pulley 52, exits from the side of the second guide pulley 52, and extends vertically upward to the middle side of the groove of the third guide pulley 53. After passing around the third guide pulley 53, the wire rope extends horizontally along the X-axis to the first fixed pulley 321 of the pulley assembly 32. After passing around the first fixed pulley 321, the wire rope enters downward into the receiving cavity 332 of the lifting device assembly 33, passes around the rope groove of the movable pulley 333 (at this time, due to the load, the wire rope is tightly fitted with the groove of the movable pulley 333), exits from the bottom of the movable pulley 333, passes upward around the second fixed pulley 322, and the end of the wire rope is fixed to the anchor point 40 of the support frame 31 by a shackle or the like.

[0107] Understandably, in this embodiment of the invention, the vertically staggered arrangement of the guide pulleys (i.e., the first guide pulley 51 and the second guide pulley 52 are staggered, while the second guide pulley 52 and the third guide pulley 53 are aligned) makes the winding path of the traction member 341 approximately a "Z"-shaped zigzag line. This avoids the problem of excessively small bending radius of the wire rope caused by the small pulley spacing during traditional straight winding, thus reducing the bending stress of the wire rope. It also ensures that the tension of the traction member 341 is evenly distributed in the vertical direction, preventing load swaying due to path deviation.

[0108] The path of the traction component 341 is adjusted three times (i.e. guided by three guide pulleys), and the final pulling force direction is consistent with the direction of the load gravity (vertically downward), eliminating the horizontal component force, thereby improving the power utilization rate of the drive component 34.

[0109] Figure 4 This is a second partial structural schematic diagram of the gearbox replacement device provided in this embodiment of the utility model (mainly showing the moving mechanism).

[0110] See Figure 4 In some embodiments of this utility model, the moving mechanism 20 includes a first moving component 21 and a second moving component 22. The first moving component 21 is movably disposed on the support component 10 and is adapted to move along a first direction; the second moving component 22 is movably disposed on the first moving component 21 and is adapted to move along a second direction, wherein the first direction and the second direction are perpendicular to each other; a plurality of pulley assemblies 32 are respectively fixedly disposed on the second moving component 22.

[0111] In other words, the moving mechanism 20 provided in this embodiment of the present invention adopts an orthogonal moving structure. It achieves flexible movement in a two-dimensional plane through the nested design of the first moving component 21 (along the X-axis) and the second moving component 22 (along the Y-axis), thereby moving the lifting device assembly 33 to the lifting point position of the gearbox.

[0112] Figure 5 This is the third partial structural schematic diagram of the gearbox replacement device provided in this embodiment of the utility model (mainly showing the first moving component).

[0113] See Figure 5 In some embodiments of this utility model, the first moving component 21 includes two first moving carriers 211 spaced apart and a first driving component 213. The two first moving carriers 211 are connected by a first connecting beam 212 to form a whole. Each first moving carrier 211 has at least one first guide member 214 near both ends, and each first guide member 214 is movably engaged with the support component 10. Each first guide member 214 may include a roller (or a traveling wheel), and the surface of the support component 10 is provided with a slide rail that rolls in contact with the roller, with the roller locked onto the slide rail for limiting its position.

[0114] The first driving component 213 is disposed on the support assembly 10 and connected to at least one of the two first moving carriers 211, for driving the two first moving carriers 211 to move linearly along the first direction.

[0115] Essentially, the surface of the support assembly 10 is provided with two parallel linear guide rails, which are fixed to the main crossbeam of the support assembly 10 by pressure plates, guiding the first moving carrier 211 to move linearly along a first direction. Each first moving carrier 211 has rollers mounted near its ends via bearing seats, and these rollers make rolling contact with the linear guide rails on the surface of the support assembly 10. Two first moving carriers 211 are connected by a first connecting beam 212, allowing the two first moving carriers 211 to move synchronously when either one is driven.

[0116] It should be noted that the first drive component 213 is a linear actuator such as an electric actuator, electric cylinder, pneumatic cylinder or hydraulic cylinder.

[0117] During installation, the first guide member 214 (wheel) is connected to the first moving carrier 211 via a pin. The main crossbeam 123 of the support assembly 10 has a steel rail. The first connecting beam 212 is bolted to two spaced-apart first moving carriers 211 via a flange. The first drive component 213 (electric actuator) is connected to the main crossbeam 123 via a pin through a support. The first drive component 213 (electric actuator) pushes the first moving carrier 211 to move linearly back and forth along the steel rail.

[0118] Additionally, an anti-detachment structure can be installed on the first guide member 214 (driving wheel) to prevent it from detaching from the rail. Limiting components (such as contact switches or proximity switches) are installed at the relative positions of the first moving carrier 211 and the main crossbeam 123. When the first moving carrier 211 moves to the point where the limiting component is triggered, the limiting component sends an electrical signal to the first drive component 213 (electric actuator), causing the first drive component 213 to immediately stop and lock. At this time, the first moving carrier 211 cannot move; it can only move and retract after the locking of the first drive component 213 is manually released.

[0119] It should be noted that, in addition to linear actuators such as electric push rods, electric cylinders, pneumatic cylinders or hydraulic cylinders, the first drive component 213 can also be a ball screw nut pair. The two ends of the screw are mounted on the bearing seats of the support component 10 through angular contact ball bearings. One end of the screw is connected to a servo motor. Each first moving carrier 211 has a slider installed near both ends. The screw is driven to rotate by a synchronous belt to realize the linear motion of the first moving component 21.

[0120] See Figure 4 In some embodiments of this utility model, the second moving component 22 includes two second moving carriers 221 spaced apart and a second driving component 223.

[0121] Two second moving carriers 221, spaced apart, are connected by a second connecting beam 222. Each second moving carrier 221 has at least one second guide member 224 near both ends, and each second guide member 224 is movably engaged with a first moving carrier 211. Each second guide member 224 may include a roller (or a traveling wheel), and the surface of the first moving carrier 211 is provided with a slide rail that makes rolling contact with the roller, with the roller being locked onto the slide rail for limiting its position.

[0122] The second driving component 223 is disposed on the first moving carrier 211 and connected to at least one of the two second moving carriers 221, for driving the two second moving carriers 221 to move linearly along the second direction.

[0123] Essentially, the first moving carrier 211 can be a steel structure with a slide rail, and the two second moving carriers 221 are connected by a second connecting beam 222. Driving either of the two second moving carriers 221 allows them to move synchronously. Each second moving carrier 221 has rollers mounted near both ends via bearing seats, and the rollers make rolling contact with the slide rails on the surface of the first moving carrier 211.

[0124] Among them, the second drive component 223 is a linear actuator such as an electric actuator, electric cylinder, pneumatic cylinder or hydraulic cylinder.

[0125] During installation, the second guide member 224 (wheel) is connected to the second moving carrier 221 via a pin, the second connecting beam 222 is bolted to the second moving carrier 221 via a flange, one end of the second drive component 223 (electric push rod) is fixed to the first moving carrier 211, and the other end of the second drive component 223 (electric push rod) is connected to the second moving carrier 221 via a pin. The second drive component 223 (electric push rod) drives the second moving carrier 221 to reciprocate in a straight line.

[0126] Similarly, an anti-detachment structure can be installed on the second guide member 224 (carrying wheel) to prevent it from detaching from the rail. Limiting components (such as contact switches or proximity switches) are installed at the relative positions of the second moving carrier 221 and the first moving carrier 211. When the second moving carrier 221 moves to the point where the limiting component is triggered, the limiting component sends an electrical signal to the second drive component 223 (electric actuator), causing the second drive component 223 to immediately stop and lock. At this time, the second moving carrier 221 cannot move; it can only move and retract after the locking of the second drive component 223 is manually released.

[0127] Similarly, in addition to linear actuators such as electric actuators, electric cylinders, pneumatic cylinders, or hydraulic cylinders, the second drive component 223 can also be a ball screw nut pair. The two ends of the screw are mounted on the bearing seats of the first moving carrier 211 through angular contact ball bearings. One end of the screw is connected to a servo motor. Each second moving carrier 221 has a slider installed near both ends. The screw is driven to rotate through a synchronous belt to realize the linear motion of the second moving component 22.

[0128] Alternatively, each first guide member 214 may include a roller, and the surface of the support assembly 10 may be provided with a slide rail that engages with the roller for rolling contact. Each second guide member 224 may include a slider, and the surface of the first moving carrier 211 may be provided with a slide rail that engages with the slider for sliding contact.

[0129] Figure 6 This is a schematic diagram of the structure of the support assembly of the gearbox replacement device provided in this embodiment of the utility model.

[0130] See Figure 6 In some embodiments of this utility model, the support component 10 includes a plurality of foundation columns 11 and a rigid frame structure 12, the rigid frame structure 12 being disposed on the plurality of foundation columns 11 to form a composite structure with a double-layer frame.

[0131] Multiple foundation columns 11 are used for installation inside the wind turbine nacelle. These foundation columns 11 serve as the "foundation" of the support assembly 10, directly installed on the nacelle floor (with reserved installation positions), bearing the vertical load of the entire unit (including its own weight, gearbox weight, and dynamic lifting load) and transferring it to the nacelle structure. The number and location of the foundation columns 11 are symmetrically distributed according to the nacelle space (e.g., 4-6 columns) to ensure the load is evenly distributed to the nacelle floor (avoiding localized stress concentration).

[0132] The rigid frame structure 12 serves as the core load-bearing frame and includes two secondary crossbeams 121, multiple supporting columns 122, two main crossbeams 123, main longitudinal beams 124, and struts 125.

[0133] Each of the two secondary crossbeams 121 is mounted on top of the two foundation columns 11 (fixed at both ends by bolts or welding). The two secondary crossbeams 121 serve as bottom-level transverse support beams, primarily functioning to distribute the vertical load on the foundation columns 11 and resist transverse forces through their own bending stiffness. The connection between the secondary crossbeams 121 and the foundation columns 11 uses rigid joints (such as welding or high-strength bolts) to ensure seamless load transfer; the length of the secondary crossbeams 121 matches the spacing between the foundation columns 11.

[0134] Multiple support columns 122 are positioned one-to-one with the positions of the foundation columns 11, with each support column 122 connected to the side of the secondary crossbeam 121 opposite to the foundation column 11. The support columns 122 are vertically installed on the side of the secondary crossbeam 121 opposite to the foundation column 11 (i.e., above), and are fixed to the secondary crossbeam 121 by bolts or welding. Their tops are connected to the main crossbeam 123. As intermediate layer columns, the support columns 122 transfer the load of the main crossbeam 123 to the secondary crossbeam 121, while simultaneously raising the installation height of the main crossbeam 123 through their own height, providing sufficient operating space for the moving mechanism 20 (avoiding interference with equipment at the bottom of the cabin).

[0135] Each of the two main crossbeams 123 is mounted on two supporting columns 122 and is horizontally mounted on the top of the supporting columns 122 (fixed at both ends by bolts). As a direct mounting platform for the moving mechanism 20, it needs to have high flatness to ensure the smooth operation of the moving mechanism 20.

[0136] The main longitudinal beams 124 are spaced between the two main transverse beams 123 and are perpendicularly connected to each main transverse beam 123. The main longitudinal beams 124 and the main transverse beams 123 together form a rigid plane. The interlaced beam grid evenly distributes the local loads on the main transverse beams 123 (such as the concentrated loads of the moving mechanism 20) to all the supporting columns 122, thus preventing the main transverse beams 123 from bending and deforming due to excessive local stress.

[0137] One end of the strut 125 is movably connected to the main crossbeam 123, and the other end is connected to the support column 122. The strut 125 is made of high-strength angle steel or steel pipe, with one end hinged to the main crossbeam 123 (allowing slight rotation) and the other end hinged to the bottom of the support column 122. It resists horizontal loads (such as gearbox swaying during hoisting or wind loads outside the nacelle) through oblique tensile / compression force, and at the same time participates in the load sharing between the main crossbeam 123 and the support column 122 (converting part of the bending moment into axial force), thereby reducing the bending stress of the main crossbeam 123.

[0138] The movable mechanism 20 is movably mounted on the surface of the main crossbeam 123.

[0139] During installation, four foundation columns 11 are first installed at the reserved interface in the engine room using bolts. Then, the secondary crossbeams 121 on both sides are fixed. Next, four support columns 122 are fixed. The main crossbeam 123 with rails is then connected to the support columns 122 using bolts. Subsequently, the two ends of the four struts 125 are connected and fixed to the main crossbeam 123 and the support columns 122 respectively using pins. Finally, the main crossbeam 123 is fixed to the main longitudinal beam 124 using bolts and nuts.

[0140] It should be noted that the materials for both the support column 122 and the strut 125 are seamless round tubes with strong resistance to axial compression instability. The foundation column 11 adopts a box-type structure with parallel large cross-sections, balancing the instability resistance of the strut 125 and its manufacturability. Furthermore, the main crossbeam 123 and main longitudinal beam 124 can be adapted to different aircraft models' installation interfaces. The main crossbeam 123, main longitudinal beam 124, and support column 122 can all be assembled using a modular structure, allowing for adaptive adjustment according to different cabin heights, thus exhibiting strong versatility.

[0141] It is understood that the support component 10 and the rigid frame structure 12 (sub-beam 121 + support column 122 + main beam 123) provided in this embodiment of the present invention utilize the characteristics of the rigid connection between beam and column to convert the vertical load into the bending moment of the beam and the pressure of the column. Compared with the pure truss structure (only subjected to tension / compression), it has higher bending stiffness and is more suitable for bearing the concentrated load of the moving mechanism 20.

[0142] Continue reading Figure 2 , Figure 4 and Figure 5 In some embodiments of this utility model, the support frame 31 includes a plurality of additional columns 311, two additional crossbeams 312 arranged opposite to each other, and two additional longitudinal beams 313 arranged opposite to each other.

[0143] Multiple additional columns 311 are respectively installed on the main longitudinal beam 124; among the two additional crossbeams 312 arranged opposite each other, each additional crossbeam 312 is installed on two additional columns 311 arranged laterally; among the two additional longitudinal beams 313 arranged opposite each other, each additional longitudinal beam 313 is installed on two additional columns 311 arranged longitudinally.

[0144] Among them, multiple anchor points 40 are set on one of the additional longitudinal beams 313, and part of the guide position 50 is set on another additional longitudinal beam 313.

[0145] During installation, four additional columns 311 are fixed to the reserved interfaces of the rigid frame structure 12 via flanges. Then, the modularly assembled additional crossbeams 312 and additional longitudinal beams 313 are connected to the additional columns 311 via flanges. After completion, each guide pulley is fixed to the reserved interfaces of the rigid frame structure 12 via bolts and nuts. Then, each pulley assembly 32 is connected to the second moving carrier 221 of the second moving assembly 22 via a bracket via a pin.

[0146] Understandably, the additional crossbeams 312 and 313 form a grid structure, transforming the "isolated force" of a single additional column 311 into "collective synergistic force" by increasing lateral (crossbeam) and longitudinal (longitudinal) constraints. The orthogonal arrangement (lateral and longitudinal perpendicular) of the additional crossbeams 312 and 313 forms a force balance matrix. When lateral force Fx and longitudinal force Fy are generated due to gearbox oscillation during hoisting, the additional crossbeams 312 offset Fx through lateral stiffness, and the additional longitudinal beams 313 offset Fy through longitudinal stiffness. Their combined action causes the support frame 31 to shift as a whole.

[0147] This embodiment of the utility model uses gearbox replacement as an example to illustrate the replacement process:

[0148] When the gearbox needs to be lowered from the wind turbine nacelle to the bottom platform of the tower, the support assembly 10 is fixed to the frame 60 of the nacelle, the moving mechanism 20 is installed on the support assembly 10, and the hoisting mechanism 30 is installed on the support assembly 10 and the moving mechanism 20. The moving mechanism 20 is controlled to move the lifting assembly 33 to the lifting point position of the gearbox to be replaced via the X / Y axis drive. The drive assembly 34 is activated, releasing the traction component 341 (wire rope), and the lifting assembly 33 descends to the gearbox lifting lug position and locks. The drive assembly 34 reverses the winding of the wire rope, and through the force amplification effect (effort-saving effect) of the pulley assembly 32, the gearbox is lifted at a uniform speed. The moving mechanism 20 adjusts the position and moves the gearbox to the bottom outlet of the nacelle, and slowly lowers it to the bottom platform of the tower. The hoisting of the new gearbox is completed by repeating the above steps.

[0149] It should be noted that, for safety reasons, the first moving component 21 and the second moving component 22 in the moving mechanism 20 are prohibited from operating simultaneously.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gearbox changing device, characterized in that, include: Support components for installation inside the wind turbine nacelle; A movable mechanism is movably disposed on the support assembly and adapted to move along a first direction and a second direction, wherein the first direction and the second direction are different; Lifting mechanism, including: A support frame is fixedly mounted on the support assembly. One side of the support frame has multiple anchor points, and the other side of the support frame opposite to one side has multiple guide positions. Multiple pulley assemblies are fixedly mounted on the moving mechanism; Multiple lifting assemblies are located below the pulley assembly and are arranged in a one-to-one correspondence with the pulley assembly; Multiple drive components are installed in preset installation positions inside the wind turbine. The traction element led out by each drive component is sequentially wound around the corresponding guide position, the corresponding pulley assembly and the corresponding lifting assembly, and fixed to the corresponding anchor point.

2. The gearbox replacement device according to claim 1, characterized in that, Each of the pulley assemblies includes at least two fixed pulleys, the at least two fixed pulleys being coaxially arranged, and each of the fixed pulleys having the same hub size; The traction member, guided by the guide position, is sequentially wound around one of the at least two fixed pulleys, the lifting device assembly, and the other of the at least two fixed pulleys, and fixed to the corresponding anchor point.

3. The gearbox replacement device according to claim 2, characterized in that, Each of the lifting device assemblies includes: The lifting device housing has an internal cavity. A movable pulley is rotatably disposed in the receiving cavity, and the hub size of the movable pulley is equal to the hub size of the fixed pulley; The lifting component is mounted on the housing of the lifting device; The traction member, guided by the guide position, is sequentially wound around one of the at least two fixed pulleys, the movable pulley, and the other of the at least two fixed pulleys, and fixed to the corresponding anchor point.

4. The gearbox replacement device according to claim 1, characterized in that, Each of the guide positions is provided with a first guide pulley, a second guide pulley, and a third guide pulley; The first guide pulley and the second guide pulley are spaced apart on the support assembly, and the first guide pulley and the second guide pulley are offset in the vertical direction, and the axes of the first guide pulley and the second guide pulley are parallel; The third guide pulley is disposed on the support frame and corresponds to the position of the second guide pulley; The traction component extending from the drive assembly is sequentially wound around the first guide pulley, the second guide pulley, and the third guide pulley, as well as the corresponding pulley assembly and lifting device assembly, and fixed to the corresponding anchor point.

5. The gearbox changing device according to any one of claims 1 to 4, characterized in that, The moving mechanism includes: A first movable component is movably disposed on the support component and adapted to move along a first direction; The second moving component is movably disposed on the first moving component and adapted to move along a second direction, wherein the first direction and the second direction are perpendicular to each other; The plurality of pulley assemblies are respectively fixedly mounted on the second movable assembly.

6. The gearbox replacement device according to claim 5, characterized in that, The first moving component includes: Two first mobile carriers spaced apart are connected by a first connecting beam. Each first mobile carrier is provided with at least one first guide near both ends, and each first guide is movably engaged with the support assembly. A first driving component is disposed on the support assembly and connected to at least one of the two first moving carriers, for driving the two first moving carriers to move linearly along a first direction.

7. The gearbox replacement device according to claim 6, characterized in that, The second moving component includes: Two second mobile carriers are spaced apart and connected by a second connecting beam. Each second mobile carrier is provided with at least one second guide near both ends, and each second guide is movably engaged with the first mobile carrier. The second driving component is disposed on the first moving carrier and connected to at least one of the two second moving carriers, for driving the two second moving carriers to move linearly along the second direction.

8. The gearbox replacement device according to claim 7, characterized in that, Each of the first guide members includes a roller or a slider; the surface of the support assembly is provided with a slide rail that movably engages with the roller or the slider; And / or, Each of the second guide members includes a roller or a slider; the surface of the first moving carrier is provided with a slide rail that movably engages with the roller or the slider.

9. The gearbox changing device according to any one of claims 1 to 4, characterized in that, The support components include: Multiple foundation columns are used for installation into the nacelle of the wind turbine; Rigid frame structures, including: Two secondary beams, each of which is supported on the two foundation columns; Multiple supporting columns are arranged in a one-to-one correspondence with the positions of the foundation columns, and each supporting column is connected to the side of the secondary crossbeam away from the foundation column. Two main crossbeams, each of which is mounted on the two supporting columns; The main longitudinal beams are spaced apart between the two main transverse beams and are perpendicularly connected to each of the main transverse beams; The strut has one end movably connected to the main crossbeam and the other end connected to the support column; The movable mechanism is movably mounted on the surface of the main crossbeam.

10. The gearbox replacement device according to claim 9, characterized in that, The support frame includes: Multiple additional columns are respectively installed on the main longitudinal beam; Two additional crossbeams are arranged opposite each other, and each of the additional crossbeams is provided on two additional columns that are spaced apart in the transverse direction; Two additional longitudinal beams are arranged opposite each other, and each additional longitudinal beam is provided on two additional columns spaced apart along the longitudinal direction; Multiple anchor points are located on one of the additional longitudinal beams, and some of the guide positions are located on another additional longitudinal beam.

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