CN111606180B

CN111606180B - Self-maintenance system of offshore wind turbine

Info

Publication number: CN111606180B
Application number: CN202010268859.6A
Authority: CN
Inventors: 毛炳坤; 霍小剑; 覃刚; 徐潇; 赵世琏; 何鹏; 赵彬; 陈佳俊; 魏雪
Original assignee: Wuhan Marine Machinery Plant Co Ltd
Current assignee: Wuhan Marine Machinery Plant Co Ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2023-04-25
Anticipated expiration: 2040-04-08
Also published as: CN111606180A

Abstract

The present disclosure provides a self-maintenance system for an offshore wind turbine, which belongs to the field of ocean engineering. The offshore wind turbine self-maintenance system comprises a hoisting tool, a transition platform, maintenance equipment and a self-lifting platform; the hoisting tool is used for hoisting the transition platform to the top of the fan tower, the transition platform is used for hoisting the maintenance equipment to the top of the fan tower, the maintenance equipment is used for maintaining a fan at the top of the fan tower, and the self-elevating platform is used for adjusting the posture of the maintenance equipment. The offshore wind turbine self-maintenance system can complete replacement of the wind turbine blades and the cabin internal components, does not need to adjust the wind turbine, and has great advantages compared with a conventional wind power installation ship in the whole manufacturing cost.

Description

Self-maintenance system of offshore wind turbine

Technical Field

The disclosure relates to the technical field of ocean engineering, in particular to a self-maintenance system of an offshore wind turbine.

Background

In the field of ocean engineering, maintenance of an ocean fan mainly comprises replacement of components such as a gearbox, a generator and the like in a fan cabin and replacement of fan blades.

Because of the large size and heavy weight of the gearbox and fan blades, maintenance of these components of the fan typically requires a wind power installation vessel to complete. However, the wind power installation vessel is not equipment specially used for maintenance of the blower, and during emergency maintenance of the blower, corresponding equipment may not be coordinated to perform maintenance work, and the wind power installation vessel specially manufactured for maintenance of the blower is expensive in cost.

Disclosure of Invention

The embodiment of the disclosure provides a self-maintenance system of an offshore wind turbine, which can complete replacement of the blades of the offshore wind turbine and the internal parts of a cabin, does not need to adjust the offshore wind turbine, and has huge advantages compared with a conventional wind power installation ship in the whole manufacturing cost. The technical scheme is as follows:

the embodiment of the disclosure provides a self-maintenance system of an offshore wind turbine, which comprises a hoisting tool, a transition platform, maintenance equipment and a self-lifting platform;

the hoisting tool is used for hoisting the transition platform to the top of the fan tower, the transition platform is used for hoisting the maintenance equipment to the top of the fan tower, the maintenance equipment is used for maintaining the fan, and the self-elevating platform is used for adjusting the posture of the maintenance equipment.

Optionally, the lifting tool comprises a support frame and at least two lengthening parts protruding from the support frame, the support frame is composed of a plurality of lifting tool support columns and a plurality of connecting rods, one ends of the plurality of lifting tool support columns penetrate through a cabin top cover of a fan cabin to be hinged with cabin lifting lugs in the fan cabin, the plurality of lifting tool support columns are arranged in one-to-one correspondence with the cabin lifting lugs, and the other ends of the lifting tool support columns are connected through the plurality of connecting rods;

each lengthening part is provided with at least one first lifting lug, and each first lifting lug is internally provided with a first steel wire rope for lifting the transition platform.

Optionally, the extension includes a plurality of hollow tubes, every the both ends of hollow tube all are equipped with the flange board, can dismantle the connection through the flange board between a plurality of hollow tubes.

Optionally, the transition platform includes embraces stake mechanism and supporting platform, embracing stake mechanism is used for embracing tightly fan tower section of thick bamboo, supporting platform with embracing stake mechanism fixed connection, supporting platform arranges in the horizontal plane, install two at least groups of electric winch on the supporting platform, two at least groups of electric winch are fixed to be set up supporting platform's edge, just two at least groups of electric winch symmetry sets up, every group electric winch all includes the electric winch that two at least intervals set up, first wire rope twines electric winch is last.

Optionally, the pile holding mechanism comprises a first clamping arm, a second clamping arm, a third clamping arm, a first horizontal electric push rod, a second horizontal electric push rod and a vertical electric push rod;

the first clamping arm, the second clamping arm and the third clamping arm are all arranged in a horizontal plane, one end of the first clamping arm is hinged with one end of the second clamping arm, the other end of the first clamping arm is hinged with one end of the third clamping arm, and the other end of the second clamping arm is hinged with the other end of the third clamping arm;

one end of the first horizontal electric push rod is hinged with one end of the first clamping arm, and the other end of the first horizontal electric push rod is hinged with one end of the second clamping arm; one end of the second horizontal electric push rod is hinged with the other end of the first clamping arm, and the other end of the second horizontal electric push rod is hinged with one end of the third clamping arm;

the vertical electric push rod is used for controlling the hinging of the second clamping arm and the third clamping arm;

the first clamping arm, the second clamping arm and the third clamping arm form a circular ring structure, a plurality of locking jacks are arranged on the circular ring structure along the circumferential direction of the circular ring structure, and each locking jack is arranged along the radial direction of the circular ring structure.

Optionally, the transition platform further comprises a fixed pulley block fixedly arranged on the supporting platform;

the maintenance equipment comprises a pile holding opening and closing mechanism, a portal, a pitching oil cylinder, a movable pulley block, a lifting oil cylinder and a second steel wire rope;

the pile-holding opening and closing mechanism is used for holding or loosening the fan tower drum, one end of the portal is hinged with the pile-holding opening and closing mechanism, the other end of the portal is provided with a portal pulley block, and the portal pulley block comprises a plurality of fixed pulleys, a plurality of movable pulleys, a third steel wire rope wound on the fixed pulleys and the movable pulleys and a lifting hook arranged on the third steel wire rope;

one end of the pitching oil cylinder is hinged with the pile holding opening and closing mechanism, and the other end of the pitching oil cylinder is hinged with the portal;

the second steel wire rope is wound on the fixed pulley block and the movable pulley block, one end of the lifting oil cylinder is fixedly connected with the movable pulley block, and the other end of the lifting oil cylinder is fixedly connected with the pile holding opening and closing mechanism.

Optionally, the pile-holding opening and closing mechanism has the same structure as the pile-holding mechanism.

Optionally, the self-elevating platform comprises a platform body, a stable locking winch, a portal hoisting winch, a maintenance equipment hoisting winch and a traction winch, wherein the stable locking winch, the portal hoisting winch, the maintenance equipment hoisting winch and the traction winch are all arranged on the platform body;

a fourth steel wire rope is wound on the stable locking winch, one end of the fourth steel wire rope is fixedly arranged on the stable locking winch, and the other end of the fourth steel wire rope is fixedly connected with the maintenance equipment;

the third steel wire rope is wound on the portal hoisting winch;

the second steel wire rope sequentially bypasses the fixed pulley block and the movable pulley block and is wound on the maintenance equipment lifting winch;

and a traction steel wire rope is wound on the traction winch.

Optionally, the platform body is further provided with a maintenance equipment sliding rail and a first driving device, and the first driving device is used for driving the maintenance equipment to move along the maintenance equipment sliding rail.

Optionally, still be equipped with goods placing platform on the platform body, goods placing platform below is equipped with goods slide rail and second drive arrangement, second drive arrangement is used for driving goods along the goods slide rail removes.

The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least:

through providing an offshore wind turbine self-maintenance system, when specifically using, can utilize to lift by crane the frock and lift by crane the transition platform, after the transition platform reaches the top of fan tower section of thick bamboo, the transition platform of reuse lifts by crane maintenance equipment. After the maintenance equipment reaches the top of the fan tower, the part replacement operation of the fan can be performed through the maintenance equipment, and meanwhile, when the maintenance equipment performs the part replacement operation of the fan, the self-elevating platform can adjust the posture of the maintenance equipment to prevent the maintenance equipment from overturning. Further, the jack-up platform can also play a supporting role and is used for supporting the hoisting tool, the transition platform, the maintenance equipment and the maintenance and replacement goods. Therefore, the self-maintenance system of the wind turbine can complete replacement of the wind turbine blades and the components in the engine room, the wind turbine does not need to be adjusted, and the whole manufacturing cost is greatly superior to that of a conventional wind power installation ship.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic view of a structure of an offshore wind turbine provided in an embodiment of the disclosure;

FIG. 2 is a schematic diagram of a self-maintenance system for an offshore wind turbine provided in an embodiment of the disclosure;

fig. 3 is a schematic structural diagram of a lifting tool according to an embodiment of the disclosure;

fig. 4 is a top view of a lifting tool provided by an embodiment of the present disclosure;

FIG. 5 is a front view of a transition platform provided by an embodiment of the present disclosure;

FIG. 6 is a top view of a transition platform provided by an embodiment of the present disclosure;

FIG. 7 is a schematic illustration of the use of a maintenance device provided by an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a gantry provided by an embodiment of the present disclosure;

FIG. 9 is a schematic structural view of a jack-up platform provided by an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a migration-use of a jack-up platform provided by an embodiment of the present disclosure;

fig. 11 is an installation schematic diagram of a lifting tool provided in an embodiment of the disclosure;

FIG. 12 is a schematic installation view of a transition platform provided by an embodiment of the present disclosure;

fig. 13 is a schematic lifting view of a transition platform according to an embodiment of the disclosure;

FIG. 14 is a schematic replacement diagram of a gearbox provided by an embodiment of the present disclosure;

fig. 15 is a schematic replacement view of a fan blade according to an embodiment of the present disclosure.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

For a better understanding of the present application, the following briefly describes the structure of a lower offshore wind turbine:

fig. 1 is a schematic structural diagram of an offshore wind turbine provided in an embodiment of the disclosure, as shown in fig. 1, the offshore wind turbine includes a wind turbine tower F1, a wind turbine nacelle F2 disposed on the top of the wind turbine tower F1, and a wind blade F3 disposed at an end of the wind turbine nacelle F2.

Wherein, the cabin of fan cabin F2 is equipped with the lug.

Fig. 2 is a schematic structural diagram of an offshore wind turbine self-maintenance system provided by an embodiment of the disclosure, and as shown in fig. 2, the offshore wind turbine self-maintenance system includes a lifting tool 1, a transition platform 2, a maintenance device 3 and a self-elevating platform 4.

The hoisting tool 1 is used for hoisting the transition platform 2 to the top of the fan tower drum F1, and the transition platform 2 is used for hoisting the maintenance equipment 3 to the top of the fan tower drum F1. The maintenance equipment 3 is used for maintaining the fan, and the jack-up platform 4 is used for adjusting the posture of the maintenance equipment 3.

According to the offshore wind turbine self-maintenance system, when the offshore wind turbine self-maintenance system is specifically used, the transition platform can be lifted by using the lifting tool, and after the transition platform reaches the top of the wind turbine tower, the transition platform is reused to lift maintenance equipment. After the maintenance equipment reaches the top of the fan tower, the part replacement operation of the fan can be performed through the maintenance equipment, and meanwhile, when the maintenance equipment performs the part replacement operation of the fan, the self-elevating platform can adjust the posture of the maintenance equipment to prevent the maintenance equipment from overturning. Further, the jack-up platform can also play a supporting role and is used for supporting the hoisting tool, the transition platform, the maintenance equipment and the maintenance and replacement goods. Therefore, the self-maintenance system of the wind turbine can complete replacement of the wind turbine blades and the components in the engine room, the wind turbine does not need to be adjusted, and the whole manufacturing cost is greatly superior to that of a conventional wind power installation ship.

Because the maintenance equipment 3 is heavy and bulky, if the maintenance equipment 3 is directly lifted by the lifting tool 1, the maintenance equipment 2 is likely to turn over during the lifting process, which causes a risk. The hoisting tool 1 is heavy, the strength of the hoisting tool can meet the requirement, and the splicing work of the splicing tool is heavy. In this application, therefore, a lighter transition platform 2 is lifted first and then used to lift the maintenance equipment 3.

Fig. 3 is a schematic structural diagram of a lifting tool according to an embodiment of the present disclosure, and as shown in fig. 3, the lifting tool 1 includes a support frame 11 and at least two extension portions 12 protruding from the support frame 11. The support frame 11 comprises a plurality of lifting tooling support columns 111 and a plurality of connecting rods 112. One end of the lifting tool support column 111 penetrates through a cabin top cover of the fan cabin F2 to be hinged with a cabin lifting lug F21 in the fan cabin F2, a plurality of lifting tool support columns 111 are arranged in one-to-one correspondence with the cabin lifting lugs F21, and the other ends of the lifting tool support columns 111 are connected through a plurality of connecting rods 112.

Fig. 4 is a top view of a lifting tool provided in an embodiment of the disclosure, as shown in fig. 3 and 4, at least one first lifting lug 12a is disposed on each extension portion 12, and a first steel wire rope S1 for lifting the transition platform 2 is disposed in each first lifting lug 12a.

In this embodiment, the support frame 11 and the at least two lengthening parts 12 may be detachably connected through bolts, and the plurality of lifting tool support columns 111 and the plurality of connecting rods 112 may be detachably connected through bolts, so that the lifting tool 1 is in a spliced structure.

Then during the concrete installation, a plurality of lifting tool support columns 111, a plurality of connecting rods 112 and lengthening parts can be lifted to the top of the fan tower drum F1 for a plurality of times, so that when the lifting tool 1 is lifted for one time, the weight of the lifting tool 1 is heavier, and the accident risk is reduced.

It should be noted that, in this embodiment, the crane hoist is disposed in the fan nacelle F2, and may be used to sequentially hoist each portion of the hoisting tool 1 to the fan tower F1, and then connect and lock each portion with bolts, so as to complete hoisting and assembling of the hoisting tool 1.

The hoisting block is a manual labor-saving hoisting tool with a braking device and is an inherent structure in the fan.

Since the maintenance device 3 is the core device for replacing the fan components, the maintenance device 3 cannot reach the top of the fan nacelle F2, and thus the fan component replacement operation cannot be performed, since the fan nacelle F2 and the fan tower F1 have no directly available supporting structure. Therefore, a temporary lifting tool 1 must be installed on the structure inside the fan cabin F2, but because the lifting capability of the crane inside the fan cabin F2 is limited, the lifting tool 1 can only be made into a spliced structure, and then the lifting tool 1 is lifted to the top of the fan cabin F2 by using the crane.

Alternatively, referring to fig. 4, the extension 12 includes a plurality of hollow tubes 121, each hollow tube 121 having a flange plate 121a at both ends thereof, and the plurality of hollow tubes 121 being detachably connected to each other by the flange plates 121 a.

For example, bolts may be used to lock the adjacent two flange plates 121 a.

Alternatively, the plurality of hollow tubes 121 may be square hollow iron pieces so as to provide the first lifting lugs 12a thereon.

In this embodiment, four lifting lugs are disposed in the nacelle of the fan nacelle F2, and similarly, four first lifting lugs 12a are disposed on the lifting tool 1 in a one-to-one correspondence.

Fig. 5 is a front view of a transition platform provided by an embodiment of the present disclosure, and as shown in fig. 5, the transition platform 2 includes a pile-holding mechanism 21 and a support platform 22. Pile clasping mechanism 21 is used for clasping fan tower section of thick bamboo F1, and supporting platform 22 and pile clasping mechanism 21 fixed connection. The supporting platform 22 is arranged in the horizontal plane, at least two groups of electric winches are installed on the supporting platform 22, the at least two groups of electric winches are fixedly arranged at the edge of the supporting platform 22, and the at least two groups of electric winches are symmetrically arranged. Each set of electric winches comprises at least two electric winches 221 arranged at intervals, and the first wire rope S1 is wound on the electric winches 221.

It should be noted that, in this embodiment, the pile holding mechanism 21 is an annular structure, and the annular structure is matched with the outer diameter of the fan tower F1, but a certain gap is required to be reserved between the annular structure and the theoretical outer wall of the fan tower F1 to adapt to machining errors.

Alternatively, the electric winch 221 may be driven by a motor (not shown).

Fig. 6 is a top view of a transition platform according to an embodiment of the present disclosure, and as shown in fig. 6, the pile holding mechanism 21 includes a first clamping arm 211, a second clamping arm 212, a third clamping arm 213, a first horizontal electric push rod 214, a second horizontal electric push rod 215, and a vertical electric push rod 216.

The first clamp arm 211, the second clamp arm 212, and the third clamp arm 213 are all disposed in a horizontal plane. One end of the first clamping arm 211 is hinged to one end of the second clamping arm 212, the other end of the first clamping arm 211 is hinged to one end of the third clamping arm 213, and the other end of the second clamping arm 212 is hinged to the other end of the third clamping arm 213.

One end of the first horizontal electric push rod 214 is hinged to one end of the first clamping arm 211, and the other end of the first horizontal electric push rod 214 is hinged to one end of the second clamping arm 212. One end of the second horizontal electric push rod 215 is hinged to the other end of the first clamping arm 211, and the other end of the second horizontal electric push rod 215 is hinged to one end of the third clamping arm 213.

The vertical electric push rod 216 is used to control the other end of the second clamping arm 212 to be hinged with the other end of the third clamping arm 213.

In the present embodiment, the first horizontal electric putter 214 and the second horizontal electric putter 215 move in synchronization.

The first horizontal push rod 214 and the second horizontal push rod 215 each include an extended state and a contracted state.

When the first horizontal electric push rod 214 and the second horizontal electric push rod 215 are both extended, the other end of the second clamp arm 212 and the other end of the third clamp arm 213 are driven to approach each other, so that the pile holding mechanism 21 holds the fan tower F1 tightly.

When the first horizontal electric push rod 214 and the second horizontal electric push rod 215 are contracted, the other end of the second clamping arm 212 and the other end of the third clamping arm 213 are driven to be away from each other, so that the pile holding mechanism 21 releases the fan tower F1.

In the present embodiment, the other end of the second clamp arm 212 and the other end of the third clamp arm 213 are each provided with a pin hole.

Optionally, the vertical power push rod 216 includes a first state and a second state.

When the vertical electric push rod 216 is in the first state, the pin shaft in the vertical electric push rod 216 protrudes into the pin holes of the other end of the second clamp arm 212 and the other end of the third clamp arm 213 to hinge the other end of the second clamp arm 212 and the other end of the third clamp arm 213.

When the vertical electric push rod 216 is in the second state, the pin shaft in the vertical electric push rod 216 is reset, and the pin shaft is pulled out of the pin holes at the other end of the second clamping arm 212 and the other end of the third clamping arm 213, so as to separate the other end of the second clamping arm 212 and the other end of the third clamping arm 213, thereby facilitating the separation of the pile holding mechanism 21 from the fan tower F1.

Alternatively, the first horizontal electric push rod 214, the second horizontal electric push rod 215 and the vertical electric push rod 216 may be hydraulically driven, or may be an electrically driven structure.

When the first horizontal electric push rod 214, the second horizontal electric push rod 215, and the vertical electric push rod 216 are electric push rods, they may be driven by one motor together with the electric winch 221.

The first clamping arm 211, the second clamping arm 212 and the third clamping arm 213 form a ring structure, and a plurality of locking jacks (not shown) arranged along the circumferential direction of the ring structure are arranged on the ring structure. Each locking jack is arranged along the radial direction of the circular ring structure.

After the transition platform 2 is lifted to a set position by the lifting tool 1, the plurality of locking jacks 217 can be driven to move inwards along the radial direction of the circular ring structure so as to lock the fan tower drum F1.

Alternatively, the plurality of locking jacks may be self-locking devices that are driven by electricity.

In this embodiment, a locking plate (not shown in the figure) may be disposed at one end of the plurality of locking jacks, which is close to the axis of the circular ring structure, and the locking plate is used to generate friction with the outer wall of the fan tower F1 under the positive pressure action of the locking jacks, so as to lock the transition platform 2 and the fan tower F1.

The locking plate can be a rubber plate, and certain errors can be generated when the fan tower drum F1 is manufactured, if the locking plate is directly arranged to be a steel plate, and the fan tower drum F1 is also a steel plate, the steel plate rubs against the steel plate, under the action of positive pressure, the extreme condition of point contact possibly exists between the steel plates, and the fan tower drum F1 can be damaged, so that the locking plate is arranged to be a rubber plate to play a role in buffer protection.

The transition platform 2 further comprises a fixed pulley block 222 fixedly arranged on the supporting platform 22, and the main purpose of the fixed pulley block 222 is to serve as a supporting point of the hoisting maintenance equipment 3.

Fig. 7 is a schematic view of a maintenance apparatus according to an embodiment of the present disclosure, and as shown in fig. 7, the maintenance apparatus 3 includes a pile-holding opening and closing mechanism 31, a gantry 32, a pitch cylinder 33, a movable pulley block 34, a lift cylinder 35, and a second wire rope S2 (see fig. 6).

The pile-holding opening and closing mechanism 31 is used for holding or loosening the fan tower drum F1, one end of the gantry 32 is hinged with the pile-holding opening and closing mechanism 31, and the other end of the gantry 32 is provided with the gantry pulley block 320.

Fig. 8 is a schematic structural view of a gantry provided in an embodiment of the present disclosure, and as shown in fig. 8, a gantry pulley block 320 includes a plurality of fixed pulleys 321, a plurality of movable pulleys 322, a third wire rope S3 wound around the fixed pulleys 321 and the movable pulleys 322, and a hook 323 disposed on the third wire rope S3. The fixed pulleys 321 are directly connected and fixed with the cross beam of the portal frame 32, and the fixed pulleys 321 and the movable pulleys 322 are connected through a third steel wire rope S3. The position change between the movable pulleys 322 and the fixed pulleys 321 can be realized under the action of the third steel wire rope S3, the lifting hooks 323 fixedly connected below the movable pulleys 322 can directly lift the goods, and the tail ends of the third steel wire rope S3 are connected with a winch to lift the goods.

One end of the pitching cylinder 33 is hinged with the pile holding opening and closing mechanism 31, and the other end of the pitching cylinder 33 is hinged with the portal frame 32.

The second steel wire rope S2 is wound around the fixed pulley block 222 and the movable pulley block 34, one end of the lifting cylinder 35 is fixedly connected with the movable pulley block 34, and the other end of the lifting cylinder 35 is fixedly connected with the pile holding opening and closing mechanism 31.

The portal 32 is a portal-shaped structural member, and can push the portal 32 to rotate around one end of the portal 32 and the hinge point of the pile holding opening and closing mechanism 31 under the telescopic action of the pitching oil cylinder 33.

In the present embodiment, the pitch ram 33 includes an extended state and a contracted state, and the movement of the mast 32 can be controlled by controlling the extension and contraction of the pitch ram 33.

Alternatively, the pitch cylinder 33 may be a hydraulic drive cylinder.

In this embodiment, the lifting cylinder 35 includes an extended state and a contracted state, and the lifting cylinder 35 is in the extended state when the maintenance device 3 is lifted, so that a lifting point of the lifting can be lifted and is higher than the gravity center of the maintenance device, and thus, when the maintenance device 3 is lifted, the risk that the maintenance device 3 will not turn over during lifting is ensured.

The maintenance device 3 comprises, for example, four sets of lift cylinders 35, each set of lift cylinders 35 being connected to one movable pulley 34.

Alternatively, the pile holding opening and closing mechanism 31 has the same structure as the pile holding mechanism 21, and specific reference is made to the description of the pile holding mechanism 21.

Fig. 9 is a schematic structural view of a self-elevating platform according to an embodiment of the present disclosure, and as shown in fig. 9, the self-elevating platform 4 includes a platform body 41, a stable locking winch 42, a gantry lifting winch 43, a maintenance equipment lifting winch 44, and a traction winch 45. The lock-stabilizing winch 42, the gantry lifting winch 43, the maintenance equipment lifting winch 44, and the traction winch 45 are all provided on the platform body 41.

The fourth steel wire rope S4 is wound on the stable locking winch 42, one end of the fourth steel wire rope S4 is fixedly arranged on the stable locking winch 42, and the other end of the fourth steel wire rope S4 is fixedly connected with the maintenance equipment 3. The main function of the stable locking winch 42 is to adjust the posture of the maintenance equipment 3 by the function of the stable locking winch 42 when the maintenance equipment 3 ascends, prevent the maintenance equipment 3 from rotating, and prevent the instantaneous instability of the maintenance equipment 3 when being lifted up from striking the wind turbine tower F1.

The third wire rope S3 is wound on the gantry crane winch 43. The gantry crane winch 43 is directly coupled to the gantry pulley block 320 of the maintenance device 3, and the gantry crane winch 43 can be used for hoisting components to be replaced by the wind turbine.

The second wire rope S2 is wound around the fixed pulley block 222 and the movable pulley block 34 in sequence and around the maintenance equipment lifting winch 44. The function of the maintenance equipment lifting winch 44 is to achieve lifting of the maintenance equipment 3.

The traction winch 45 is wound with a traction wire rope. When the gantry lifting winch 431 vertically drops the fan component close to the jack-up platform 4, the fan component can be further separated from the jack-up platform 4 by a certain horizontal distance, and at this time, the traction steel wire rope can be tied to the fan component to drive the traction winch 4 to pull the fan component onto the jack-up platform 4.

In this embodiment, the jack-up platform 4 may be a platform with self-navigation and self-positioning functions.

Fig. 10 is a schematic diagram of a migration usage of a jack-up platform according to an embodiment of the present disclosure, as shown in fig. 10, a maintenance device sliding rail 411 and a first driving device (not shown in the drawing) are further disposed on the platform body 41, and the first driving device is used for driving the maintenance device 3 to move along the maintenance device sliding rail 411.

Optionally, the platform body 41 is further provided with a cargo placement platform 41a, and a cargo slide rail 412 and a second driving device (not shown in the figure) are disposed below the cargo placement platform 41, where the second driving device is used for driving the cargo to move along the cargo slide rail 412.

In this embodiment, the first driving device and the second driving device may be hydraulic cylinders.

Alternatively, both the service equipment skid 411 and the cargo skid 412 may be steel rails that support the service equipment.

The following briefly describes a use process of the self-maintenance system of an offshore wind turbine provided in the embodiments of the present disclosure:

(1) And (3) self-elevating platform migration:

the jack-up platform 4 carries the maintenance equipment 3, lifts by crane frock 1 and transition platform 2 and migrates near the fan that the wind field is waited to maintain together, and during migration, transition platform 2 can directly place on the maintenance equipment 3, then jack-up platform 4 location, jack-up platform 4 descends spud leg 4a stake (see fig. 2), jack-up platform 4 rises to the appointed height back locking.

(2) And (5) installing a lifting tool 1.

The maintenance device 3 is moved by the first driving device on the maintenance device slide rail 411 to be fixed to the side of the ship. Then, the lifting hook of the gantry pulley block 320 of the maintenance device 3 lifts the personnel and the lifting tool, and under the action of the pitching oil cylinder 33, the gantry 32 is pitching to be close to the fan tower F1, and the personnel and the materials are placed on a basic platform (the basic platform is an inherent structure of the fan) on the fan tower F1. Then the hoisting tool 1 is hoisted to the top of the nacelle by a hoisting block in the fan nacelle F2. And then the hoisting tool 1 is assembled and fixed at the top of the engine room, and the first steel wire rope S1 wound on the electric winch 221 on the transition platform 2 is installed in the first lifting lug 1a on the hoisting tool 1.

Fig. 11 is an installation schematic diagram of a lifting tool according to an embodiment of the present disclosure, as shown in fig. 11, at this time, one ends of a plurality of lifting tool support columns 111 of the lifting tool 1 are hinged to a nacelle lifting lug F21 in a fan nacelle F2.

(3) The transition platform 2 is raised and fixed.

The electric winch 221 of the transition platform 2 is started while the second wire rope S2 between the fixed pulley block 222 of the transition platform 2 and the movable pulley block 34 of the maintenance device 3 is coupled. While the electric winch 221 drives the transition platform 2 to ascend, the maintenance equipment lifting winch 44 corresponding to the second steel wire rope S2 between the fixed pulley block 222 of the transition platform 2 and the movable pulley block 34 of the maintenance equipment 3 is started, the maintenance equipment lifting winch 44 receives the rope, and the second steel wire rope S2 has a traction effect on the transition platform 2, so that the transition platform 2 is prevented from being out of control and colliding with a wind turbine tower in the lifting moment. When the transition platform 2 approaches the fan tower drum F1, the pile holding mechanism 21 is opened, so that the inner wall of the pile holding mechanism 21 is in contact with the outer wall of the fan tower drum F1. Then lifting the transition platform 2, closing the pile holding mechanism 21 after the transition platform 2 reaches the top of the fan tower drum F1, enabling the vertical electric push rod 216 to drive the bolt to be inserted into the pin holes on the other end of the second clamping arm 212 and the other end of the third clamping arm 213, locking the pile holding mechanism 21, and then starting the plurality of locking jacks 217 to fixedly lock the whole transition platform 2 and the fan tower drum F1.

Fig. 12 is an installation schematic diagram of a transition platform provided in the embodiment of the present disclosure, as shown in fig. 12, at this time, a first steel wire rope S1 passes through a first lifting lug 1a on a lifting tool 1, and two ends of the first steel wire rope S1 are respectively disposed in two electric winches 221 on the transition platform 2. The transition platform 2 holds the fan tower drum F1 tightly.

(4) The maintenance device 3 is raised and locked.

After the transition platform 2 is locked and fixed, the maintenance equipment lifting winch 44 is started, the stable locking winch 42 is started at the same time, the pile holding opening and closing mechanism 31 of the maintenance equipment 3 surrounds the fan tower drum F1, the rope collecting of the maintenance equipment lifting winch 44 drives the maintenance equipment 3 to lift, the stable locking winch 42 also collects the rope, the fourth steel wire rope S4 is kept in a tensioning state, the maintenance equipment 3 is guaranteed to slowly approach the fan tower drum F1, the lifting is continued until the movable pulley block 34 of the maintenance equipment 3 approaches the transition platform 2, and at the moment, the maintenance equipment lifting winch 44 stops and brakes and locks. Then, the lift cylinder 35 contracts, driving the entire maintenance apparatus 3 to continue to rise until the upper surface of the maintenance apparatus 3 comes into contact with the lower surface of the transition platform 2 to stop. And then a plurality of locking jacks of the maintenance equipment 3 are started, so that the maintenance equipment 3 and the fan tower can be reliably locked.

Fig. 13 is a schematic view of a transition platform according to an embodiment of the disclosure, as shown in fig. 13, at this time, the maintenance device 3 has been lifted onto the fan tower F1 and locked with the fan tower F1.

(5) The maintenance equipment performs normal fan replacement operations.

When the mast 32 is tilted forward, causing the mast assembly 320 to approach the fan blade F3, the fan blade F3 may be lifted. When the mast 32 is tilted backward, the gearbox and generator inside the nacelle F2 can be lifted and then the fan blades or gearbox or generator are finally placed on the cargo placement platform 41a under the pulling action of the traction wire rope on the traction winch 44.

Fig. 14 is a replacement schematic diagram of a gear box provided in an embodiment of the present disclosure, and as shown in fig. 14, a hook 323 in the maintenance device 3 lifts and lowers the gear box M1, and a traction wire rope on the traction winch 45 is tied to the replaced gear box M1.

Fig. 15 is a schematic diagram of replacement of a fan blade according to an embodiment of the present disclosure, as shown in fig. 15, where a gantry pulley set 320 on a gantry 32 is located above a fan blade F3, so as to facilitate lifting the fan blade F3.

It should be noted that, because the center of gravity of the fan blade F3 is generally far from one end of the fan blade F3, if the fan blade F is horizontally hoisted, the center of gravity of the fan blade F3 is far from the center of the fan tower F1. The lifting hook of the portal of the equipment cannot be lifted, so that the fan blade F3 can only be lifted and installed in a vertical state.

The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims

1. The self-maintenance system of the offshore wind turbine is characterized by comprising a hoisting tool (1), a transition platform (2), maintenance equipment (3) and a self-lifting platform (4);

the hoisting tool (1) is used for hoisting the transition platform (2) to the top of a fan tower (F1), the transition platform (2) comprises a pile holding mechanism (21), the pile holding mechanism (21) is used for holding the fan tower (F1), and the transition platform (2) is used for hoisting the maintenance equipment (3) to the top of the fan tower (F1) when the pile holding mechanism (21) holds the fan tower (F1), and the maintenance equipment (3) is used for being fixed to the top of the fan tower (F1) so as to maintain a fan;

the self-elevating platform (4) comprises a platform body (41), a stable locking winch (42) and a maintenance equipment lifting winch (44), wherein the stable locking winch (42) and the maintenance equipment lifting winch (44) are arranged on the platform body (41), and the maintenance equipment lifting winch (44) is configured to: and in the lifting process of the transition platform (2), the stable locking winch (42) is connected with the transition platform (2) and used for adjusting the posture of the transition platform (2), and the stable locking winch (42) is configured to: and in the lifting process of the maintenance equipment (3), the lifting device is connected with the maintenance equipment (3) and is used for adjusting the posture of the maintenance equipment (3).

2. Offshore wind turbine self-maintenance system according to claim 1, wherein the lifting fixture (1) comprises a support frame (11) and at least two lengthening parts (12) protruding out of the support frame (11), the support frame (11) is composed of a plurality of lifting fixture support columns (111) and a plurality of connecting rods (112), one end of each lifting fixture support column (111) penetrates through a cabin top cover of a wind turbine cabin (F2) to be hinged with a cabin lifting lug (F21) in the wind turbine cabin (F2), the plurality of lifting fixture support columns (111) are arranged in one-to-one correspondence with the cabin lifting lugs (F21), and the other ends of the lifting fixture support columns (111) are connected through the plurality of connecting rods (112);

each lengthening part (12) is provided with at least one first lifting lug (12 a), and each first lifting lug (12 a) is internally provided with a first steel wire rope (S1) for lifting the transition platform (2).

3. The offshore wind turbine self-maintenance system according to claim 2, wherein the extension (12) comprises a plurality of hollow tubes (121), flange plates (121 a) are arranged at two ends of each hollow tube (121), and the plurality of hollow tubes (121) are detachably connected through the flange plates (121 a).

4. Offshore wind turbine self-maintenance system according to claim 2, characterized in that the transition platform (2) further comprises a support platform (22), the support platform (22) is fixedly connected with the pile holding mechanism (21), the support platform (22) is arranged in a horizontal plane, at least two groups of electric winches are mounted on the support platform (22), the at least two groups of electric winches are fixedly arranged at the edge of the support platform (22), the at least two groups of electric winches are symmetrically arranged, each group of electric winches comprises at least two electric winches (221) arranged at intervals, and the first steel wire rope (S1) is wound on the electric winches (221).

5. The offshore wind turbine self-maintenance system of claim 4, wherein the pile-holding mechanism (21) comprises a first clamp arm (211), a second clamp arm (212), a third clamp arm (213), a first horizontal electric push rod (214), a second horizontal electric push rod (215), and a vertical electric push rod (216);

the first clamping arm (211), the second clamping arm (212) and the third clamping arm (213) are all arranged in a horizontal plane, one end of the first clamping arm (211) is hinged with one end of the second clamping arm (212), the other end of the first clamping arm (211) is hinged with one end of the third clamping arm (213), and the other end of the second clamping arm (212) is hinged with the other end of the third clamping arm (213);

one end of the first horizontal electric push rod (214) is hinged with one end of the first clamping arm (211), and the other end of the first horizontal electric push rod (214) is hinged with one end of the second clamping arm (212); one end of the second horizontal electric push rod (215) is hinged with the other end of the first clamping arm (211), and the other end of the second horizontal electric push rod (215) is hinged with one end of the third clamping arm (213);

the vertical electric push rod (216) is used for controlling the other end of the second clamping arm (212) to be hinged with the other end of the third clamping arm (213);

the first clamping arm (211), the second clamping arm (212) and the third clamping arm (213) form a circular ring structure, a plurality of locking jacks (217) arranged along the circumferential direction of the circular ring structure are arranged on the circular ring structure, and each locking jack (217) is arranged along the radial direction of the circular ring structure.

6. The offshore wind turbine self-maintenance system according to claim 5, wherein the transition platform (2) further comprises a fixed pulley block (222) fixedly arranged on the support platform (22);

the maintenance equipment (3) comprises a pile holding opening and closing mechanism (31), a portal (32), a pitching oil cylinder (33), a movable pulley block (34), a lifting oil cylinder (35) and a second steel wire rope (S2);

the pile-holding opening and closing mechanism (31) is used for holding or loosening the fan tower (F1), one end of the portal (32) is hinged with the pile-holding opening and closing mechanism (31), the other end of the portal (32) is provided with a portal pulley block (320), and the portal pulley block (320) comprises a plurality of fixed pulleys (321), a plurality of movable pulleys (322), a third steel wire rope (S3) wound on the fixed pulleys (321) and the movable pulleys (322) and a lifting hook (323) arranged on the third steel wire rope (S3);

one end of the pitching oil cylinder (33) is hinged with the pile holding opening and closing mechanism (31), and the other end of the pitching oil cylinder (33) is hinged with the portal (32);

the second steel wire rope (S2) is wound on the fixed pulley block (222) and the movable pulley block (34), one end of the lifting oil cylinder (35) is fixedly connected with the movable pulley block (34), and the other end of the lifting oil cylinder (35) is fixedly connected with the pile holding opening and closing mechanism (31).

7. Offshore wind turbine self-maintenance system according to claim 6, wherein the pile-holding opening and closing mechanism (31) has the same structure as the pile-holding mechanism (21).

8. Offshore wind turbine self-maintenance system according to claim 6, characterized in that the self-elevating platform (4) comprises a gantry hoisting winch (43) and a traction winch (45), the lock winch (42), the gantry hoisting winch (43) and the traction winch (45) being all arranged on the platform body (41);

a fourth steel wire rope (S4) is wound on the stable locking winch (42), one end of the fourth steel wire rope (S4) is fixedly arranged on the stable locking winch (42), and the other end of the fourth steel wire rope (S4) is fixedly connected with the maintenance equipment (3);

the third steel wire rope (S3) is wound on the portal hoisting winch (43);

the second steel wire rope (S2) sequentially bypasses the fixed pulley block (222) and the movable pulley block (34) and is wound on the maintenance equipment lifting winch (44);

and a traction steel wire rope is wound on the traction winch (45).

9. The offshore wind turbine self-maintenance system according to claim 8, wherein the platform body (41) is further provided with a maintenance equipment sliding rail (411) and a first driving device, and the first driving device is used for driving the maintenance equipment (3) to move along the maintenance equipment sliding rail (411).

10. Offshore wind turbine self-maintenance system according to claim 8, wherein the platform body (41) is further provided with a goods placement platform (41 a), and a goods slide rail (412) and a second driving device are arranged below the goods placement platform (41 a) and used for driving goods to move along the goods slide rail (412).