CN114635834A

CN114635834A - Method for replacing gear box of wind driven generator and hoisting system

Info

Publication number: CN114635834A
Application number: CN202210302131.XA
Authority: CN
Inventors: 邓安平; 曹广启; 孙振军; 毛嘉伟; 许樟来
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-06-17

Abstract

The application provides a method for replacing a gear box of a wind driven generator and a hoisting system. The replacement method comprises the steps of dismantling a part of a shell at the bottom of an engine room of the wind driven generator to form a hoisting opening, and erecting a hoisting platform on the outer wall of a tower cylinder of the wind driven generator, wherein the hoisting platform is positioned below the hoisting opening. And hoisting the gear box to be replaced from the installation position to the upper part of the hoisting port in the cabin. And hoisting the gear box to be replaced from the hoisting opening to the hoisting platform downwards. And hoisting the gear box to be replaced from the hoisting platform to an external carrying platform. The hoisting system comprises a hoisting device and a driving device. So, compare in the scheme that needs get off the cabin integral hoisting and use large-scale delivery platform, need not to hang down whole cabin in this application, the miniaturized delivery platform of corresponding adoption effectively reduces fortune dimension cost.

Description

Method for replacing gear box of wind driven generator and hoisting system

Technical Field

The application relates to the technical field of fans, in particular to a method for replacing a gear box of a wind driven generator and a hoisting system.

Background

In the field of wind turbines, particularly offshore wind power generators, a gear box in a nacelle needs to be replaced after a long time due to the influence of environmental factors. In the related art, during the process of replacing the gearbox, the integral nacelle needs to be hoisted from the top of the tower. Due to the fact that the overall size and the mass of the cabin are large, a large hoisting system and a large carrying platform are correspondingly needed. Thus, the operation and maintenance costs are increased.

Disclosure of Invention

The application provides a method for replacing a gear box of a wind driven generator and a hoisting system, which are used for reducing operation and maintenance costs.

The application provides a method for replacing a gearbox of a wind driven generator, which comprises the following steps:

part of a shell at the bottom of an engine room of the wind driven generator is dismantled to form a hoisting opening, and a hoisting platform is erected on the outer wall of a tower cylinder of the wind driven generator and is positioned below the hoisting opening;

hoisting a gear box to be replaced from an installation position to the position above the hoisting opening in the engine room;

hoisting the gear box to be replaced from the hoisting opening downwards to the hoisting platform;

and hoisting the gear box to be replaced from the hoisting platform to an external carrying platform.

Optionally, hoisting the gear box to be replaced from the installation position to the position above the hoisting port in the nacelle includes: and hoisting the gear box to be replaced from the mounting position to the upper part of the hoisting port along the axial direction of the main shaft of the wind driven generator.

Optionally, hoisting the gear box to be replaced from the installation position to the position above the hoisting port in the nacelle includes:

assembling a first hoisting structure;

and hoisting the gear box to be replaced to the position above the hoisting port from the installation position through the first hoisting structure.

Optionally, with the gear box that treats to be changed from hoist and mount mouth hoist and mount downwards to hoist and mount platform includes: and hoisting the gear box to be replaced downwards to the hoisting platform from the hoisting port through the first hoisting structure.

Optionally, with the gear box that treats to be changed certainly hoist and mount platform to outside delivery platform includes:

assembling a second hoisting structure;

and hoisting the gear box to be replaced to an external carrying platform from the hoisting platform through the second hoisting structure.

Optionally, after the gearbox to be replaced is hoisted from the hoisting platform to an external carrying platform, the method further includes:

hoisting a gear box to be installed to the hoisting platform from an external carrying platform;

hoisting the gear box to be installed upwards from the hoisting platform and hoisting the gear box to be installed into the engine room from the hoisting opening;

hoisting the gearbox to be installed to the installation position in the nacelle.

The application also provides a hoist and mount system for change aerogenerator's gear box, wherein, include:

the hoisting device comprises at least two groups of hoisting components which are arranged in parallel and used for hoisting the gear box to move relative to a main shaft of the wind driven generator connected with the gear box;

and the driving device is connected with the at least two groups of hoisting assemblies and is used for driving the at least two groups of hoisting assemblies to perform lifting motion, translational motion and rotary motion.

Optionally, the hoisting assembly includes:

a support member;

a frame member slidably disposed on the support member;

the hoisting component is movably connected to the frame body component and used for hoisting the gear box;

the hoisting device further comprises a connecting beam which is connected between the frame parts of the at least two groups of hoisting assemblies.

Optionally, the driving device includes at least two sets of translation assemblies, which correspond to the number of the hoisting assemblies and are connected in a one-to-one correspondence manner; the translation assembly includes:

the sliding screw rod is arranged on the corresponding supporting part of the hoisting assembly along the axial direction of the main shaft of the wind driven generator;

the sliding nut is sleeved on the sliding screw rod and is connected with the corresponding frame body part of the hoisting assembly;

and the driving assembly is connected with the sliding screw rod and is used for driving the sliding screw rod to rotate around the axial direction of the main shaft so as to drive the sliding nut to move along the sliding screw rod.

Optionally, the driving device includes a lifting assembly, and the lifting assembly includes:

a first lifter;

at least two groups of pulley parts which correspond to the hoisting assemblies in number and are connected with the frame body parts of the hoisting assemblies in a one-to-one correspondence manner;

at least two groups of rope parts which correspond to the number of the pulley parts and are connected in a one-to-one correspondence manner; the first end of the rope piece is connected with the first lifter, and the second end of the rope piece is wound on the pulley part corresponding to the second end of the rope piece and is connected with the hoisting part corresponding to the second end of the rope piece in the vertical direction.

Optionally, the pulley part comprises a fixed pulley and a movable pulley;

the fixed pulley is connected in corresponding support body part, the second end of rope spare is in proper order around establishing the fixed pulley with the movable pulley, the movable pulley passes through the rope spare is hung and is located the below of fixed pulley, and with correspond hoist and mount part is connected.

Optionally, the drive device comprises a swivel assembly;

the slewing assembly comprises a slewing bearing part and a second lifter assembled on the slewing bearing part; the slewing bearing part is used for being arranged on a tower drum of the wind driven generator in a rotating mode in the vertical direction, and the second lifter is connected with the hoisting parts of the hoisting assemblies in the vertical direction; or

The slewing assembly comprises a slewing bearing part and a second lifter which is arranged on the slewing bearing part in a rotating mode around the vertical direction; the slewing bearing part is used for being arranged on a tower of the wind driven generator, and the second lifter is connected with the hoisting parts of the hoisting assemblies in the vertical direction.

According to the method for replacing the gearbox of the wind driven generator, the gearbox to be replaced is hoisted downwards to a hoisting platform on the outer wall of the tower barrel through a hoisting opening in the bottom of the engine room, and then is further hoisted to an external carrying platform. So, compare in the scheme that needs get off and use large-scale delivery platform with cabin integral hoisting, need not to hang down whole cabin in this application, the miniaturized delivery platform of corresponding adoption effectively reduces fortune dimension cost.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a partial schematic view of a wind turbine generator according to the related art;

figure 2 shows a front view of a hoist device of the hoist system of the present application;

figure 3 is a top view of the hoist assembly of the hoist device of the hoist system shown in figure 2;

figure 4 is a side view of a hoist assembly of the hoist device of the hoist system shown in figure 2;

FIG. 5 is a schematic structural view illustrating the mounting of the rotating assembly of the hoisting system of the present application to the tower of a wind turbine;

FIG. 6 is a step diagram illustrating a method of replacing a gearbox of a wind turbine according to the present application;

FIG. 7 is a schematic structural view of a wind turbine gearbox of the present application from a nacelle to a mounting platform;

FIG. 8 is a schematic structural view of another perspective of the gearbox of the wind turbine of the present application being hoisted from the nacelle to the hoist platform;

FIG. 9 is a schematic structural view of a gearbox of a wind turbine of the present application being hoisted from a nacelle to a hoisting platform from yet another perspective;

FIG. 10 is a schematic structural view of the gearbox of the wind turbine shown in FIG. 1 being hoisted from a hoisting platform to a carrying platform;

FIG. 11 is a diagram illustrating a specific step of a method of replacing a gearbox of the wind turbine shown in FIG. 5;

FIG. 12 is a diagram illustrating another exemplary step of a method for replacing a gearbox of the wind turbine shown in FIG. 5;

FIG. 13 is a diagram illustrating another exemplary step of a method for replacing a gearbox of the wind turbine shown in FIG. 6;

FIG. 14 is a diagram illustrating a further specific step of a method of replacing a gearbox of the wind turbine shown in FIG. 5.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The method for replacing the gearbox of the wind driven generator comprises the steps of dismantling a part of a shell at the bottom of an engine room of the wind driven generator to form a lifting hole, and erecting a lifting platform on the outer wall of a tower cylinder of the wind driven generator, wherein the lifting platform is located below the lifting hole. And hoisting the gear box to be replaced from the installation position to the upper part of the hoisting port in the cabin. And hoisting the gear box to be replaced from the hoisting opening to the hoisting platform downwards. And hoisting the gear box to be replaced from the hoisting platform to an external carrying platform. So, compare in the scheme that needs get off and use large-scale delivery platform with cabin integral hoisting, need not to hang down whole cabin in this application, the miniaturized delivery platform of corresponding adoption effectively reduces fortune dimension cost.

The application also provides a hoisting system, which comprises the hoisting device and a driving device. The hoisting device comprises at least two groups of hoisting components which are arranged in parallel and used for hoisting the gear box to move relative to a main shaft of the wind driven generator connected with the gear box. The driving device is connected with the at least two groups of hoisting components and used for driving the at least two groups of hoisting components to perform lifting motion, translational motion and rotary motion.

Fig. 1 is a partial schematic structural view of a wind turbine 1 in the related art. As shown in fig. 1. The wind turbine 1 includes a tower 9, a nacelle 4 disposed on top of the tower 9, and a gearbox 10 and a main shaft 11 disposed in the nacelle 4. The gear case 10 is assembled with the main shaft 11. In the field of wind turbines, particularly offshore wind power generators, the gearbox 10 in the nacelle 4 needs to be replaced after a long time due to environmental factors. Therefore, it is necessary to equip the wind turbine generator 1 with an associated lifting system 12 for replacing the gearbox 10 of the wind turbine generator 1.

Specifically, referring to fig. 2-4, fig. 2 is a front view of the hoisting device 13 of the hoisting system 12 provided in the present application. Figure 3 is a top view of the hoist assembly 14 of the hoist device 13 of the hoist system 12 shown in figure 2. Figure 4 is a side view of the hoist assembly 14 of the hoist device 13 of the hoist system 12 shown in figure 2. The hoist system 12 includes a hoist device 13. The hoisting device 13 comprises at least two sets of hoisting assemblies 14 arranged parallel to each other for hoisting the gearbox 10 for movement relative to the main shaft 11 of the wind turbine 1 to which the gearbox 10 is connected. In this embodiment, at least two sets of lifting assemblies 14 are lifted into the nacelle 4 by lifting equipment (not shown), for example, at least two sets of lifting assemblies 14 outside the wind turbine 1 are lifted into the nacelle 4 by an electric hoist. And, the at least two sets of hoisting assemblies 14 are respectively connected with the inner wall of the nacelle 4 at both sides of the gearbox 10. In the process of hoisting the gearbox 10, at least two groups of hoisting assemblies 14 are respectively connected with two sides of the gearbox 10. For example, at least two sets of lifting lugs of the lifting assembly 14 are respectively connected with the two lifting lugs on the two sides of the gear box 10, so that the gear box 10 can be driven to move away from the main shaft 11 or towards the main shaft 11. Therefore, the gearbox 10 is hoisted to move relative to the main shaft 11 through at least two groups of hoisting assemblies 14, and the structure is simple and the operation is convenient.

In some embodiments, the lifting assembly 14 includes a support member 17, a frame member 18, and a lifting member 19. The frame member 18 is slidably provided to the support member 17. The hoisting member 19 is movably connected to the frame member 18 for hoisting the gearbox 10. In this embodiment, the support member 17 is fixed to the bottom wall of the nacelle 4 for supporting the frame body member 18, while the frame body member 18 is slidable relative to the support member 17. The lifting member 19 moves as the frame member 18 slides on the support member 17, thereby moving the gear box 10 relative to the main shaft 11. In some embodiments, the support member 17 may comprise a support block, and since the gearbox 10 is in an assembled state with the main shaft 11 in a downwardly inclined state towards the bottom of the nacelle 4, the top surface of the support block is arranged to be downwardly inclined towards the bottom of the nacelle 4, facilitating lifting the gearbox 10 in relation to the main shaft 11. In some embodiments, the number of support blocks may be 1, 2, etc., and preferably, the number of support blocks is 2, and the 2 support blocks may be spliced with each other and fixed to the bottom wall of the nacelle 4 by bolts.

In some embodiments, the frame members 18 comprise two sets and are supported at intervals on top of the support members 17. Each set of frame members 18 includes at least two uprights 21 and a cross-member 220. At least two columns 21 are erected side by side and at intervals on the support member 17. A cross member 220 is connected between at least two of the uprights 21. In some embodiments, at least two of the columns 21 are bolted to one of the beams 220. So set up, the rigidity of reinforcing support body part 18 is favorable to hoist and mount gear box 10's stability.

In some embodiments, the lifting members 19 comprise two sets, each of which is connected to at least two sets of frame members 18 in a one-to-one correspondence. The gearbox 10 is suspended between two sets of suspension members 19. In some embodiments, the lifting member 19 comprises a hook.

In some embodiments, the lifting device 13 further includes a connecting beam 20 connected between each frame member 18 of at least two sets of lifting assemblies 14. The connecting beam 20 is bolted between two adjacent cross beams 220 for enhancing the rigidity of the frame member 18 and further increasing the stability of the hoisting gearbox 10.

In some embodiments, hoist system 12 further includes a drive device 16. The driving device 16 is connected with the at least two groups of hoisting assemblies 14, and the driving device 16 is used for driving the at least two groups of hoisting assemblies 14 to perform lifting movement, translational movement and rotary movement. In this embodiment, the driving device 16 is further assembled and connected to the at least two sets of hoisting assemblies 14, so that the driving device 16 and the at least two sets of hoisting assemblies 14 are matched with each other to hoist the gear box 10, thereby realizing the lifting movement, the translational movement and the rotary movement of the gear box 10. In this way, the purpose of replacing the gearbox 10 is achieved.

In some embodiments, the driving device 16 includes at least two sets of translation assemblies 210, corresponding to the number of hoisting assemblies 14 and connected in a one-to-one correspondence. The translation assembly 210 includes a slide screw 22, a slide nut 23, and a drive assembly 24. The sliding screw 22 is arranged on the support part 17 of the corresponding hoisting assembly 14 in the axial direction of the main shaft 11 of the wind turbine 1. The sliding nut 23 is sleeved on the sliding screw rod 22 and connected with the corresponding frame body part 18 of the hoisting assembly 14. And the driving assembly 24 is connected with the sliding screw rod 22, and the driving assembly 24 is used for driving the sliding screw rod 22 to rotate around the axial direction of the main shaft 11 so as to drive the sliding nut 23 to move along the sliding screw rod 22. In this embodiment, the slide screw 22 is connected to the support member 17 at one end and to the driving unit 24 at the other end. The slide nut 23 is provided with a through hole 250 therein, and the slide screw 22 is sleeved through the through hole 250. And, the top of slip nut 23 is connected in the bottom of support member 18, and the top card of bottom is located the top surface of support member 17 for bear the load of support member 18 and hoist and mount subassembly 14, and drive support member 18 and slide. In some embodiments, each set of frame members 18 includes at least two sliding nuts 23, and the at least two sliding nuts 23 are connected to the bottom ends of the at least two columns 21 of each set of frame members 18. In some embodiments, the top surface of the support member 17 includes a rail 25. At least two slip nuts 23 are snapped onto this rail 25. The rail 25 may be segmented to reduce the difficulty of hoisting into the nacelle 4. In some embodiments, the top end of the sliding nut 23 and the bottom end of the upright 21 may be connected by a flange plate (not shown) and bolts. So set up, provide power for sliding lead screw 22 through drive assembly 24 to drive sliding lead screw 22 and rotate, thereby drive slip nut 23 along sliding lead screw 22's length direction reciprocating motion, structural design is ingenious, and it is effectual to drive support body part 18 translation.

With continued reference to fig. 2, in some embodiments, the drive assembly 24 includes a coupling 30 and a driver 31; the coupling 30 is rotatably connected between the sliding screw 22 and the driver 31 for controlling the rotation direction of the driver 31 for driving the sliding screw 22. For example, the coupling 30 can control the driver 31 to rotate clockwise, and then the sliding screw 22 is driven to rotate clockwise correspondingly, so that the sliding nut 23 slides along the sliding screw 22 towards the main shaft 11; or the coupling 30 can also control the driver 31 to rotate counterclockwise, and then the sliding screw 22 is driven to rotate counterclockwise correspondingly, so that the sliding nut 23 slides along the direction of the sliding screw 22 away from the spindle 11.

In some embodiments, the drive device 16 includes a lift assembly 32. The lifting assembly 32 includes a first lift 33, at least two sets of pulley members 34, and at least two sets of rope members 35. At least two sets of pulley parts 34 correspond to the number of hoisting assemblies 14 and are connected with the frame parts 18 of the hoisting assemblies 14 in a one-to-one correspondence. At least two sets of rope elements 35 are associated with a number of pulley elements 34 and one to one correspondence. A first end of the rope member 35 is connected to the first lifter 33, and a second end of the rope member 35 is wound around the corresponding pulley member 34 and is connected to the corresponding hoisting member 19 in the vertical direction. In this embodiment, the first lifter 33 is provided below the hoisting member 19. One end of at least two groups of rope pieces 35 is respectively connected with the first lifter 33, and the other end of at least two groups of rope pieces 35 is respectively wound on at least two groups of pulley parts 34 in a one-to-one correspondence manner and then is connected with the corresponding hoisting part 19. The first lifter 33 can control at least two sets of rope members 35 to slide on at least two corresponding sets of pulley members 34, so as to pull the hoisting members 19 to drive the gearbox 10 to perform lifting movement. In some embodiments, the first lift 33 comprises a crane.

In some embodiments, pulley member 34 includes a fixed pulley 36 and a movable pulley 37. The fixed pulleys 36 are connected to the corresponding frame members 18, the second ends of the rope members 35 are sequentially wound around the fixed pulleys 36 and the movable pulleys 37, and the movable pulleys 37 are hung below the fixed pulleys 36 through the rope members 35 and connected to the corresponding hoisting members 19. In this embodiment, the second end of the rope member 35 extends upward from the first elevator 33 to the fixed pulley 36, and then winds the movable pulley 37 downward, so that the movable pulley 37 is hung below the fixed pulley 36, and further, the second end of the rope member 35 is fixed to the frame member 18. In some embodiments, the crown block 36 may include at least two and is immovably fixed to the frame member 18. The movable sheave 37 may include at least two. The second end of the rope member 35 extends upward from the first elevator 33, is wound around the first fixed sheave 36 (the right fixed sheave 36 as viewed in fig. 2), is wound around the first movable sheave 37 downward (the right movable sheave 37 as viewed in fig. 2), extends upward, is wound around the second fixed sheave 36 (the left fixed sheave 36 as viewed in fig. 2), continues to be wound around the second movable sheave 37 downward (the left movable sheave 37 as viewed in fig. 1), and is finally fixed to the frame member 18. Further, the hoisting member 19 is connected between at least two movable pulleys 37. So set up for hoist and mount gear box 10's elevating movement is stable, and effectual.

In some embodiments, the pulley member 34 further includes a guide pulley 370, the guide pulley 370 being attached to the frame member 18 and positioned to the right of the crown pulley 36 (as viewed in fig. 2). The second end of the rope member 35 is passed around a guide pulley 370 before being passed upwards around the fixed pulley 36. The guide pulley 370 serves to guide the extending direction of the rope member 35.

Fig. 5 is a schematic structural view illustrating the assembly of the rotating assembly 38 of the hoisting system 12 provided by the present application to the tower 9 of the wind turbine 1. In some embodiments, drive device 16 includes a swivel assembly 38. The slewing assembly 38 includes a slewing bearing member 39 and a second lifter 40 assembled to the slewing bearing member 39; the pivoting support part 39 is arranged to be rotatable about a vertical direction on the tower 9 of the wind turbine 1, and the second lifter 40 is connected to the lifting part 19 of each lifting assembly 14 along the vertical direction. In this embodiment, the hoisting platform 5 is erected on the outer wall of the tower tube 9 of the wind driven generator 1, and the hoisting platform 5 is connected with the tower tube 9 through bolts, so that the wind driven generator is convenient to disassemble and assemble. The rotating assembly 38 is arranged close to the hoisting platform 5 and above the hoisting platform 5, and is used for controlling the rotating motion of the gearbox 10 around the outer wall of the tower 9, so that the gearbox 10 can be hoisted to a nearby operation and maintenance ship; or the gearbox 10 is hoisted from the operation and maintenance vessel to the hoisting platform 5. Specifically, the slewing bearing member 39 of the slewing assembly 38 is sleeved on the outer wall of the tower 9 and can rotate circumferentially around the outer wall of the tower 9. The second lifter 40 of the slewing assembly 38 is provided on the surface of the slewing bearing part 39. The second lifter 40 may move with the rotation of the pivoting support part 39, thereby causing the gear box 10 to pivot.

In some embodiments, slewing bearing element 39 includes an inner ring structure 41 and an outer ring structure 42, wherein inner ring structure 41 is bolted to the outer wall of tower 9, and outer ring structure 42 is sleeved outside inner ring structure 41 and is rotatable around inner ring structure 41. The second lifter 40 is fixed to an upper surface of the outer race structure 42. The second lifter 40 moves with the rotation of the outer race structure 42, thereby bringing the gear box 10 into a swing motion. In some embodiments, second lift 40 includes a first hoist 43, a boom 44, a first pulley member 45, a hydraulic cylinder push rod 46, and a first cable member 47. Wherein the first crane 43 is fixed to the outer ring structure 42. One end of the suspension rod 44 may be connected to the outer ring structure 42 by a hinge arrangement and the other end is fitted with a first pulley part 45. One end of a cylinder rod 46 may be connected to the outer ring structure 42 by a hinge arrangement and the other end may also be connected to the outer wall of the suspension rod 44 by a hinge arrangement. One end of the first rope member 47 is connected to the first crane 43, and the other end thereof is wound around the first pulley member 45 and then can be connected to the gearbox 10 to be hoisted. Thus, the first crane 43 pulls the elevating movement of the gear box 10 by controlling the first rope member 47. The hydraulic cylinder push rod 46 pushes the suspension rod 44 through telescopic movement, so that the gearbox 10 moves close to the tower 9 or moves away from the tower 9 along the radial direction of the tower 9. Specifically, in the process of hoisting the gearbox 10 to a nearby operation and maintenance ship, the hydraulic cylinder push rod 46 performs contraction movement, so that the gearbox 10 hoisted by the first rope piece 47 moves away from the outer wall of the tower 9, and the gearbox 10 is prevented from colliding with the tower 9 when performing rotary movement around the circumferential direction of the tower 9, so that the hoisting effect of the gearbox 10 is influenced; during the hoisting of the gearbox 10 from a nearby service vessel onto the hoisting platform 5, the hydraulic cylinder push rod 46 performs an extending movement. This moves the gearbox 10 hoisted by the first cable member 47 close to the outer wall of the tower 9, and the gearbox 10 can be hoisted to the hoisting platform 5. In this way, the first crane 43, the suspension rod 44, the first pulley member 45, the hydraulic cylinder push rod 46, and the first rope member 47 cooperate with each other to realize the turning motion of the gear box 10. In some embodiments, the first crane 43 is fixed to the outer race structure 42 by welding.

In some embodiments, the slewing assembly 38 includes a second elevator 40 rotatably provided to the slewing bearing member 39 about the vertical direction; the slewing bearing part 39 is used for being arranged on the tower 9 of the wind driven generator 1, and the second lifter 40 is connected with the hoisting part 19 of each hoisting assembly 14 along the vertical direction. In this embodiment, the slewing bearing member 39 may not rotate around the outer wall of the tower 9, but the second lift 40 may rotate. The slewing bearing part 39 only functions to support the second lifter 40, and the second lifter 40 can bring the gear box 10 into slewing motion.

Fig. 6 is a step diagram of a method 3 for replacing a gearbox 10 of a wind turbine 1 according to the present application. Fig. 7 is a schematic structural diagram of a perspective view of hoisting the gearbox 10 of the wind turbine 1 from the nacelle 4 to the hoisting platform 5. Fig. 8 is a schematic structural view of another perspective of hoisting the gearbox 10 of the wind turbine 1 from the nacelle 4 to the hoisting platform 5. Fig. 9 is a schematic structural view of a further perspective of hoisting the gearbox 10 of the wind turbine 1 from the nacelle 4 to the hoisting platform 5. Fig. 10 is a schematic structural view of the gearbox 10 of the wind turbine 1 shown in fig. 1 being hoisted from the hoisting platform 5 to the carrying platform.

As shown in fig. 6 to 10, the replacement method 3 includes: step 1, removing a part of a shell 7 at the bottom of a cabin 4 of a wind driven generator 1 to form a lifting opening 8, and erecting a lifting platform 5 on the outer wall of a tower barrel 9 of the wind driven generator 1, wherein the lifting platform 5 is positioned below the lifting opening 8; step 2, hoisting the gear box 10 to be replaced from the installation position to the upper part of the hoisting port 8 in the cabin 4; step 3, hoisting the gear box 10 to be replaced from the hoisting port 8 to the hoisting platform 5; and 4, hoisting the gear box 10 to be replaced from the hoisting platform 5 to an external carrying platform. In the related art, during the replacement of the gearbox 10, the nacelle 4 needs to be lifted from the top of the tower 9 in its entirety. Due to the large volume and mass of the whole cabin 4, a large hoisting structure and a large carrying platform are correspondingly needed. Thus, the operation and maintenance costs are increased. Therefore, in the present embodiment, by opening the hoisting opening 8 at the bottom of the nacelle 4, the gear box 10 to be replaced is hoisted out of the nacelle 4 through the hoisting opening 8 and further hoisted down to the hoisting platform 5. The gearbox 10 to be replaced is then again lifted from the lifting platform 5 to a nearby carrying platform. In some embodiments, the carrier platform is a small operation and maintenance vessel. So, compare in the scheme that needs get off 4 integral hoisting in cabin and use large-scale carrying platform, need not to hang down 4 integral cabin in this application, the miniaturized carrying platform of corresponding adoption effectively reduces fortune dimension cost.

Fig. 11 shows a specific step diagram of the method 3 for replacing the gearbox 10 of the wind turbine 1 shown in fig. 5. As shown in fig. 11, in some embodiments, hoisting the gearbox 10 to be replaced from the installation position to above the hoisting opening 8 in the nacelle 4 comprises: and step 21, hoisting the gear box 10 to be replaced from the installation position to the upper part of the hoisting port 8 along the axial direction of the main shaft 11 of the wind driven generator 1. Since the gearbox 10 to be replaced is assembled with the main shaft 11 before disassembly. Therefore, the gear box 10 to be replaced needs to be detached from the main shaft 11 and then hoisted to the upper side of the hoisting port 8, so that the gear box 10 to be replaced can be conveniently and subsequently hoisted downwards to the hoisting platform 5 through the hoisting port 8.

Fig. 12 shows another specific step of the method 3 for replacing the gearbox 10 of the wind turbine 1 shown in fig. 5. As shown in fig. 12, in some embodiments, hoisting the gearbox 10 to be replaced from the installation position to above the hoisting opening 8 in the nacelle 4 comprises: step 22, assembling a first hoisting structure; and step 23, hoisting the gear box 10 to be replaced to the upper part of the hoisting port 8 from the installation position through the first hoisting structure. In this embodiment, before the gear box 10 to be replaced is hoisted above the hoisting opening 8, a first hoisting structure is assembled in the nacelle 4, and the gear box 10 to be replaced is further hoisted above the hoisting opening 8 by the first hoisting structure. The first hoisting structure may be realized by a hoisting assembly 14 in the hoisting system 12. Specifically, the gear box 10 to be replaced is hoisted between at least two sets of hoisting components 14, and then the at least two sets of hoisting components 14 drive the gear box 10 to be replaced to translate to the upper part of the hoisting opening 8 from the installation position. In addition, it should be noted that after the first hoisting structure is assembled, the peripheral material of the gearbox 10 to be replaced needs to be removed, so that space is left for the gearbox 10 to be replaced to be able to be lifted out of the hoisting opening 8.

Fig. 13 is a diagram illustrating another specific step of the method 3 for replacing the gearbox 10 of the wind turbine 1 illustrated in fig. 6. Referring to fig. 6, 7 and 13, in some embodiments, the hoisting of the gearbox 10 to be replaced from the hoisting opening 8 down to the hoisting platform 5 comprises: and 31, hoisting the gear box 10 to be replaced from the hoisting port 8 to the hoisting platform 5 through the first hoisting structure. In this embodiment, the first hoist structure may be implemented by the hoist assembly 32 in the hoist system 12. Specifically, the gear box 10 to be replaced is connected through the lifting assembly 32, and then the gear box 10 with replacement is driven to move downwards to the hoisting platform 5 from the upper part of the hoisting port 8.

Fig. 14 shows a further specific step of the method 3 for replacing the gearbox 10 of the wind turbine 1 shown in fig. 5. Referring to fig. 10 and 14, in some embodiments, hoisting the gearbox 10 to be replaced from the hoisting platform 5 to an external carrying platform includes: step 41, assembling a second hoisting structure; and 42, hoisting the gear box 10 to be replaced from the hoisting platform 5 to an external carrying platform through a second hoisting structure. In this embodiment, before the gearbox 10 to be replaced is hoisted to the external carrying platform, a second hoisting structure is assembled on the outer wall of the tower 9, and the gearbox 10 to be replaced on the hoisting platform 5 is further hoisted to the carrying platform through the second hoisting structure. The second hoist structure may be implemented by a swivel assembly 38 in the hoist system 12. Specifically, the gear box 10 to be replaced is driven to rotate and move through the rotation of the rotating assembly 38, so that the gear box 10 to be replaced is lifted from the lifting platform 5 to the carrying platform.

With continued reference to fig. 5, in some embodiments, after hoisting the gearbox 10 to be replaced from the hoisting platform 5 to the external carrying platform, the method further includes: step 5, hoisting the gear box to be installed from an external carrying platform to a hoisting platform 5; step 6, hoisting the gear box to be installed upwards from the hoisting platform 5 and hoisting the gear box into the engine room 4 from the hoisting port 8; and 7, hoisting the gear box to be installed to an installation position in the cabin 4. In this embodiment, the gearbox 10 to be replaced can only be hoisted from the external carrier platform into the nacelle 4 after it has been hoisted to the external carrier platform. In this manner, the complete gearbox 10 replacement process is completed. It should be noted that the hoisting sequence of the gear box to be installed from the external carrying platform to the nacelle 4 is opposite to the hoisting sequence of the gear box 10 to be replaced from the nacelle 4 to the external carrying platform. And the hoisting structures used in the two hoisting sequences are the same. Therefore, detailed description thereof is omitted.

In some embodiments, after assembling the gearbox to be installed with the main shaft 11, the first and second lifting structures also need to be removed.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. A method for replacing a gearbox of a wind turbine, comprising:

2. The replacement method according to claim 1, wherein hoisting the gear box to be replaced from an installation position to above the hoisting opening in the nacelle comprises: and hoisting the gear box to be replaced from the mounting position to the upper part of the hoisting port along the axial direction of the main shaft of the wind driven generator.

3. The replacement method according to claim 1, wherein hoisting the gear box to be replaced from an installation position to above the hoisting opening in the nacelle comprises:

assembling a first hoisting structure;

and hoisting the gear box to be replaced to the upper part of the hoisting port from the installation position through the first hoisting structure.

4. The replacement method according to claim 3, wherein hoisting the gearbox to be replaced from the hoisting opening down to the hoisting platform comprises: and hoisting the gear box to be replaced downwards to the hoisting platform from the hoisting port through the first hoisting structure.

5. The replacement method according to claim 1, wherein hoisting the gearbox to be replaced from the hoisting platform to an external carrying platform comprises:

assembling a second hoisting structure;

6. The replacement method according to claim 3, wherein after hoisting the gear box to be replaced from the hoisting platform to an external carrying platform, further comprising:

hoisting the gear box to be installed to the installation position in the engine room.

7. A hoist system for replacing a gearbox of a wind turbine, comprising:

8. The hoist system of claim 7, wherein the hoist assembly comprises:

a support member;

a frame member slidably disposed on the support member;

the hoisting device further comprises a connecting beam connected between the frame parts of the at least two groups of hoisting assemblies.

9. The hoisting system of claim 8 wherein the drive means comprises at least two sets of translation assemblies in number corresponding to the number of hoisting assemblies and connected in one-to-one correspondence; the translation assembly includes:

10. The hoist system of claim 8, wherein the drive device includes a lift assembly, the lift assembly including:

a first lifter;

11. The hoist system of claim 10, wherein the sheave assembly includes a fixed sheave and a movable sheave;

the fixed pulley is connected in corresponding the support body part, the second end of rope spare is in proper order around establishing the fixed pulley with the movable pulley, the movable pulley passes through the rope spare is hung and is located the below of fixed pulley, and with correspond the hoist and mount part is connected.

12. The hoist system of claim 8, wherein the drive arrangement includes a swivel assembly;