Offshore wind generating set hoisting system

Abstract

The utility model provides an offshore wind generating set hoisting system, the offshore wind generating set comprises a tower, the offshore wind generating set hoisting system comprises a hoisting tool, the hoisting tool comprises a hoisting tool support, a hoisting winch and a hoisting twisted rope, the hoisting winch is used for providing hoisting power, and the hoisting winch is used for providing hoisting power; the output end of the hoisting winch is connected with a hoisting winch cylinder, the hoisting winch cylinder is wound with the hoisting twisted rope, a hoisting point is arranged at the top of the tower, and the free end of the hoisting twisted rope can bypass the hoisting point and is connected to the hoisting tool support. According to the lifting tool support, the lifting tool support can rise to the top of the tower from a floating crane ship or fall to the floating crane ship from the top of the tower, in the lifting process of the lifting tool and the lifting process of unit components, an installation ship does not need to be occupied, and therefore the cost for renting the installation ship is saved, and the assembling cost of the wind generating set is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and in particular relates to an offshore wind turbine generator set hoisting system. Background Art

[0002] At present, offshore wind power generation technology is developing rapidly, and the units are updated and iterated quickly. There are usually two solutions for replacing major components of wind turbines:

[0003] One solution is to use a large crane to dismantle the nacelle and then dismantle the transformer for replacement. This solution is large in engineering volume and high in cost, so it is usually not adopted. Another solution is to use a conventional winch at the bottom of the tower and set up a pulley block in the nacelle for replacement. This solution requires a large installation ship at the bottom of the tower to support the winch. The unit replacement cycle is long, resulting in the need to occupy the installation ship for a long time. The rental cost of the installation ship is high, which in turn leads to high lifting costs for offshore units. Utility Model Content

[0004] The main purpose of the present disclosure is to provide an offshore wind turbine generator set hoisting system to reduce the offshore unit hoisting cost.

[0005] In view of the above objectives, the present disclosure provides the following technical solutions:

[0006] On the one hand, the present disclosure provides an offshore wind turbine generator set hoisting system, the offshore wind turbine generator set includes a tower, the offshore wind turbine generator set hoisting system includes a hoist, the hoist includes a hoist bracket, a hoisting winch and a hoisting rope, the hoisting winch is used to provide hoisting power, the output end of the hoisting winch is connected to the hoisting drum, the hoisting rope is wound around the hoisting drum, a hoisting point is provided on the top of the tower, the free end of the hoisting rope can bypass the hoisting point and be connected to the hoist bracket, so that the hoist bracket can rise from a floating crane to the top of the tower or fall from the top of the tower to the floating crane.

[0007] According to an exemplary embodiment of the present disclosure, the wind turbine generator set further includes a nacelle arranged on the top of the tower and a unit component installed in the nacelle, and the hanger further includes a connecting piece, which is arranged on the hanger bracket, wherein the unit component is provided with a connecting portion matching the connecting piece, and the hanger is connected to the unit component by connecting the connecting piece to the connecting portion; or, the rear frame of the nacelle is provided with a connecting portion matching the connecting piece, and the hanger is connected to the rear frame of the nacelle by connecting the connecting piece to the connecting portion.

[0008] According to another exemplary embodiment of the present disclosure, the connecting member is a telescopic member, a fixed end of the telescopic member is connected to the hanger bracket, and an extended end of the telescopic member can be extended relative to the hanger bracket to be connected to the connecting portion.

[0009] Optionally, the telescopic members are arranged in pairs and at intervals, and the protruding ends of the telescopic members are arranged facing each other, or the offshore wind turbine hoisting system also includes a sensor and a controller, the sensor is used to detect the relative position of the connecting part and the connecting member, when the connecting member reaches a predetermined position relative to the connecting part, the controller can control the connecting member to be inserted into the connecting part.

[0010] Specifically, the wind turbine generator set also includes a nacelle arranged on the top of the tower and unit components installed in the nacelle, and the hanger also includes a connecting piece, which is arranged on the hanger bracket, and the side wall of the tower is provided with a connecting part matching the connecting piece, and the hanger is connected to the side wall of the tower by connecting the connecting piece to the connecting part.

[0011] Furthermore, the connecting member is a twist lock that can rotate between an unlocked position and a locked position, and the connecting portion is a pin hole that matches the twist lock. When the twist lock is inserted into the pin hole and adjusted to the locked position, the sling is connected to the connecting portion.

[0012] According to another exemplary embodiment of the present disclosure, the offshore wind turbine generator set further comprises a nacelle installed at the top of the tower, a rear frame of the nacelle and a plurality of unit components installed on the rear frame of the nacelle, and the offshore wind turbine generator set lifting system further comprises a lifting point, and the lifting rope of the lifting winch can pass around the lifting point, wherein the lifting point is arranged on the rear frame of the nacelle; or, the offshore lifting system further comprises a top hanger for connecting to the rear frame of the nacelle, and the lifting point is arranged on the top hanger.

[0013] Optionally, the offshore lifting system further comprises a cable wind device, and the lifting device is connected to the floating crane vessel via the cable wind device.

[0014] Specifically, the wind turbine device includes a frame structure, a mobile winch, a guide pulley group and a universal pulley group, wherein the mobile winch is movably connected to the frame structure, the guide pulley group is rotatably connected to the frame structure, and the guide pulley group is located above the mobile winch, the universal pulley group is rotatably arranged on the frame structure, and the universal pulley group is located on the side of the guide pulley group facing the hanger bracket, and a tail pulley group is arranged on the hanger bracket, one end of the wind turbine rope is wound around the wind turbine drum of the mobile winch, and the other end of the wind turbine rope is connected to the tail pulley group after passing through the guide pulley group and the universal pulley group in sequence.

[0015] Furthermore, the wind cable device also includes a universal pulley bracket, which is arranged on the top of the frame structure and protrudes and extends toward one side of the hanger bracket. The universal pulley bracket is provided with a limiting through hole, and the wind cable rope passes through the limiting through hole from the guide pulley group and is wrapped around the universal pulley group.

[0016] According to another exemplary embodiment of the present disclosure, the offshore wind turbine generator system further comprises a boom arranged on the hanger bracket, one end of the boom is pivotally connected to the hanger bracket, the boom can be pivotally folded on the hanger bracket, and pivotally unfolded relative to the hanger bracket, and the boom is a retractable boom.

[0017] Optionally, the wind turbine generator set also includes a nacelle arranged on the top of the tower, the nacelle can yaw counterclockwise by a first predetermined angle, and the boom can yaw clockwise by a second predetermined angle relative to the hoist bracket, so that the boom can lower the unit components onto a transport ship, or lift the unit components from the transport ship; or, the nacelle can yaw clockwise by a third predetermined angle, and the boom can yaw counterclockwise by a fourth predetermined angle relative to the hoist bracket, so that the boom can lower the unit components onto the transport ship, or lift the unit components from the transport ship.

[0018] The lifting device is a chain which is connected to the lifting device of the present invention and is configured to connect the first and second lifting devices to the lifting device, wherein the lifting device is a chain which is connected to the lifting device of the present invention to a new type of lifting device and a new type of lifting device for lifting.

[0019] Furthermore, the unit components include a generator, a transformer, a gearbox, a blade, or an impeller.

[0020] The offshore wind turbine generator set hoisting system provided by the present disclosure has at least the following beneficial effects: the offshore wind turbine generator set hoisting system provided by the present disclosure, the hoisting device can lift itself to the top of the tower, and during the hoisting of the hoisting device itself and the hoisting of the unit components, there is no need to occupy the installation ship, thereby saving the cost of renting the installation ship and reducing the assembly cost of the wind turbine generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or other objects and advantages of the present disclosure will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A structural diagram of an offshore wind turbine hoisting system provided for a first exemplary embodiment of the present disclosure.

[0023] Figure 2 for Figure 1 Structural diagram of the spreader.

[0024] Figure 3 A structural diagram of a top hanger in an offshore wind turbine installation system provided for a second exemplary embodiment of the present disclosure.

[0025] Figure 4 A simplified structural diagram of an offshore wind turbine hoisting system provided for a third exemplary embodiment of the present disclosure.

[0026] Figure 5 for Figure 4 The usage status diagram of the offshore wind turbine hoisting system.

[0027] Figure 6 for Figure 4 Structural diagram of the arrangement of the cable wind device and hoisting equipment on the floating crane.

[0028] Figure 7 for Figure 6 Front view of the wind cable device and the spreader.

[0029] Figure 8 for Figure 7 A partial enlarged view of the left end structure of the middle spreader.

[0030] Fig. 9 for Figure 6 Frame structure diagram of the mid-cable wind device.

[0031] Fig.10 for Fig. 9 Front view of the frame structure of the mid-cable wind device.

[0032] Fig.11 for Fig. 9 Top view of the frame structure of the mid-cable wind device.

[0033] Fig.12 for Figure 6 Structural diagram of the middle boom and boom support.

[0034] Description of reference numerals:

[0035] 1. Spreader bracket; 2. Top hanger;

[0036] 3. Lifting rope; 4. Lifting winch;

[0037] 5. Floating crane; 6. Guide wheel;

[0038] 7. Lifting point; 8. Connecting parts;

[0039] 9. Tower; 10. Hoisting equipment;

[0040] 11. Anti-collision wheel; 12. Cable wind device;

[0041] 13. Guy rope; 14. Jib;

[0042] 15. Boom bracket; 16. Boom drive component;

[0043] 21. Hanger cantilever; 22. Hanger telescopic member;

[0044] 23. Hanger support; 24. Hanger suspension rope;

[0045] 101. Fixed pulley in cabin;

[0046] 104. First turning pulley block; 106. First load-bearing main pulley;

[0047] 107. The second turning pulley block; 108. The second load-bearing main pulley;

[0048] 112. Tail pulley block; 113. Lifting pulley block;

[0049] 201. frame structure; 202. position limiting through hole;

[0050] 203. Mobile winch; 206. Guide pulley block;

[0051] 207. Universal pulley bracket; 208. Universal pulley assembly. DETAILED DESCRIPTION

[0052] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the implementation of the present disclosure is limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0053] Reference Figures 1 to 3The present invention provides an offshore wind turbine hoisting system, which is applicable to offshore wind turbines and is used to assist in the hoisting of turbine components during the disassembly, assembly and replacement of offshore wind turbines. As the load of offshore wind turbines continues to increase, the size of turbine components is also increasing.

[0054] The offshore wind turbine generator set includes a tower 9, a nacelle installed on the tower 9, and unit components installed in the nacelle, wherein the unit components include a transformer on the top of the nacelle, or a gearbox, or a blade, or an impeller, etc., but are not limited thereto. For the convenience of description, this embodiment is described by taking the offshore wind turbine generator set hoisting system used to replace the transformer on the top of the nacelle as an example, but is not limited thereto.

[0055] The offshore wind turbine generator hoisting system includes a hoist 10, and a hoisting point 7 is provided on the top of the tower 9, and the hoisting point 7 is used to support the lifting rope 3 (described below) of the hoist 10. The offshore wind turbine generator hoisting system is supported by the hoisting point 7 and can lift heavy objects. The heavy objects can be the above-mentioned unit components, or the hoist 10 itself, but not limited to this.

[0056] Reference Figure 2 In this embodiment, the hoisting device 10 includes a hoisting device support 1, a hoisting winch 4 and a hoisting rope 3. The hoisting winch 4 is connected to the hoisting device support 1 to provide hoisting power. The output end of the hoisting winch 4 is connected to a hoisting drum, and the hoisting rope 3 is wound around the hoisting drum. When the hoisting winch 4 is started, it can drive the hoisting drum to rotate, so that the hoisting rope 3 is wound around the hoisting drum to realize the hoisting rope 3 to be wound around, or detached from the hoisting drum to realize the hoisting rope 3 to be released.

[0057] As an example, when the lifting drum rotates clockwise, the lifting rope 3 is wound around the lifting drum, and when the lifting drum rotates counterclockwise, the lifting rope 3 can be separated from the lifting drum.

[0058] As an example, after starting the hoisting winch 4, when the hoisting drum rotates clockwise, the hoisting drum will rotate driven by the output end of the hoisting winch 4, so that the hoisting rope 3 is wound on the hoisting drum to realize the rope reeling of the hoisting rope 3, and at this time, the heavy object carried on the hoisting rope 3 can be raised as the rope reeling of the hoisting rope 3 is pulled in. When the hoisting drum rotates counterclockwise, the hoisting rope 3 will gradually detach from the hoisting drum to realize the rope release of the hoisting rope 3, and at this time, the heavy object carried on the hoisting rope 3 will be lowered as the rope reeling of the hoisting rope 3 is released.

[0059] The free end of the lifting rope 3 can pass around the lifting point 7 and be connected to the lifting device bracket 1, so that when the lifting rope 3 is reeled in, the lifting device 10 itself will be lifted up and leave the floating crane vessel 5, for example but not limited to, the lifting device 10 is lifted to the top of the tower 9, or when the lifting rope 3 is released, the lifting device 10 itself will be lowered, so that when the lifting device 10 is used to lift heavy objects, there is no need to occupy the installation vessel for a long time, thereby reducing the rental cost of the installation vessel and reducing the assembly cost of the offshore wind turbine generator set.

[0060] In this embodiment, the lifting rope 3 of the hoisting device 10 passes around the lifting point 7 at the top of the tower 9 and is connected to the hoisting device bracket 1. After the lifting winch 4 is started, the lifting winch 4 will drive the lifting drum to rotate to wrap the lifting rope 3 around the lifting drum, thereby realizing the rope reeling of the lifting rope 3 and allowing the hoisting device bracket 1 to rise from the floating crane 5 to the top of the tower 9, or when the lifting drum rotates in the opposite direction, the lifting rope 3 can be detached from the lifting drum, thereby realizing the rope reeling of the lifting rope 3 and allowing the hoisting device bracket 1 to fall from the top of the tower 9 to the floating crane 5.

[0061] The offshore wind turbine generator set hoisting system provided by the present invention has a hoisting rope 3 of the hoisting device 10 that passes around the hoisting point 7 on the top of the tower 9, so that the hoisting device 10 can lift itself and leave the installation ship, and there is no need to occupy the installation ship when the hoisting device 10 is used to lift heavy objects, thereby saving the rental cost of the installation ship and reducing the assembly cost of the offshore wind turbine generator set.

[0062] Continue to refer to Figure 2 As an example, the hanger bracket 1 may be a frame structure, but the invention is not limited thereto. This embodiment is described by taking the hanger bracket 1 as a hexahedral frame structure as an example, wherein the hoisting winch 4 is arranged in the hexahedral frame structure, but the invention is not limited thereto. In this embodiment, the hanger bracket 1 of the frame structure uses less material and is light in weight, thereby reducing the manufacturing cost of the offshore wind turbine hoisting system.

[0063] In this embodiment, the hoisting winch 4 is described by taking a friction winch as an example, but the present invention is not limited thereto.

[0064] Continue to refer to Figure 2 In order to prevent the spreader 10 from colliding with the tower 9 during the rising or lowering process, an anti-collision wheel 11 is provided on the side of the spreader 10 facing the tower 9. The anti-collision wheel 11 is rotatably arranged on the circumferential outer side of the spreader bracket 1, but not limited to this.

[0065] Continue to refer to Figure 2 As an example, the sling 10 further includes a connecting member 8 to facilitate the connection of the sling 10 with the tower 9 or a machine assembly component.

[0066] In this embodiment, the connecting member 8 can be a telescopic member, the fixed end of the telescopic member is connected to the hanger bracket 1, and the extended end of the telescopic member can be extended relative to the hanger bracket 1 so as to be connected to the connecting part of the unit component, or to the connecting part of the rear frame of the cabin, so that the hanger 10 can be connected to the unit component or the rear frame of the cabin.

[0067] In this embodiment, the telescopic members are arranged in pairs and at intervals, and the extended ends of the telescopic members are arranged facing each other.

[0068] Specifically, the telescopic parts are arranged in pairs, and a pair of telescopic parts are arranged on the hanger bracket 1 at intervals and facing each other. When the hanger 10 is lifted to the top of the tower 9, for example but not limited to, when the hanger bracket 1 is lifted to the bottom of the unit component, a pair of telescopic parts are located on both sides of the unit component, and the telescopic parts can extend toward each other so as to be connected to the unit component to be replaced at the top of the tower 9, but not limited to this. In this way, by relatively arranging a pair of telescopic parts on the hanger bracket 1, when connecting with the unit component, a pair of telescopic parts can be located on both sides of the unit component respectively, avoiding accidental separation of the telescopic parts relative to the unit component, and improving the reliability of the connection between the telescopic parts and the unit component.

[0069] In this embodiment, the telescopic members are arranged to face each other as a pair of telescopic members with their telescopic ends facing each other and their fixed ends facing each other, so that the extended end of one telescopic member can extend toward the direction of the other telescopic member.

[0070] As an example, in this embodiment, the connecting member 8 is horizontally arranged at the top of the hanger bracket 1, but it is not limited thereto. For the convenience of description, this embodiment will be described by taking the connection between the connecting member 8 and the bottom of the transformer as an example, for example but not limited to, the transformer is roughly a hexahedral structure, and a plurality of connecting parts are respectively arranged on two opposite sides in the width direction of the bottom of the transformer, for example but not limited to, the connecting part is a pin hole matching the telescopic member, and this embodiment is described by taking the example of two pin holes respectively arranged on the sides in the width direction of the bottom of the transformer.

[0071] When the sling 10 moves close to the transformer, for example but not limited to, when the sling 10 moves below the transformer, the telescopic member can be inserted into the pin hole, thereby achieving the connection between the sling 10 and the transformer. Optionally, in this embodiment, the telescopic member extends approximately horizontally, and the pin hole matched therewith is arranged approximately horizontally, so that the extension direction of the telescopic member is perpendicular to the gravity of the transformer, and in the process of lifting or lowering the transformer, the sling is prevented from accidentally detaching from the transformer under the action of gravity, thereby improving the reliability of the offshore wind turbine hoisting system.

[0072] This embodiment is described by taking the disassembly and downward transportation of the transformer on the top of the tower 9 as an example. In the initial state, the transformer on the top of the tower 9 is fixed on the operating platform. After the hoist 10 is moved up to the top of the tower 9, the hoist 10 can be connected to the transformer, and then the transformer is disassembled from the operating platform, and the lifting winch 4 is started again to move the transformer and the hoist 10 down to the bottom of the tower together, so that the transformer can be disassembled and transported downward. It can be understood that the transformer can also be a gear box, a blade or an impeller, etc. according to needs, but it is not limited to this.

[0073] In addition, the offshore wind turbine hoisting system can also be used for the hoisting and installation of the above-mentioned components, and the transformer is used as an example. When the hoisting device 10 is on the floating crane 5, the transformer is connected to the hoisting device 10, and the hoisting winch 3 is passed around the hoisting point 7 on the top of the tower 9, and the hoisting winch 4 is started to drive the hoisting winch 3 to move, thereby lifting the hoisting device 10 and the transformer. When the transformer is lifted to a predetermined position, the transformer can be fixed to the operating platform, and then the transformer and the hoisting device 10 are removed.

[0074] For the convenience of description, this embodiment is described by taking the installation part provided on the unit component as an example. The connecting member 8 includes an electric push rod. The connecting part on the unit component is provided as a pin hole matching the electric push rod. When the hanger 10 moves to the appropriate position below the unit component, the electric push rod can extend and insert into the pin hole, so that the hanger 10 is connected to the unit component. In addition, the connecting member 8 can also be a telescopic cylinder, a screw assembly, etc., but it is not limited to this. In this embodiment, four connecting members 8 are provided on the top of the hanger bracket 1, which are respectively provided at the four corners of the rectangle, but it is not limited to this.

[0075] The offshore wind turbine generator set hoisting system provided by the present invention has an extending end of the telescopic member provided on the hoist bracket 1 that can extend outward relative to the hoist bracket 1 so as to be connected to the connecting part on the unit component, thereby facilitating the connection between the hoist 10 and the unit component. The system has a simple structure and a low price, thereby reducing the assembly cost of the offshore wind turbine generator set, but is not limited to this.

[0076] In order to improve the accuracy of the connection between the lifting device 10 and the unit components and increase the assembly speed, the offshore wind turbine lifting system also includes a sensor (not shown in the figure), which is used to detect the relative position of the connecting part and the connecting member 8, so that the lifting device 10 can quickly and accurately reach the predetermined position, and the connecting member 8 can be quickly and accurately inserted into the above-mentioned pin hole, but not limited to this.

[0077] It is understandable that the telescopic member can be remotely controlled so that after the hoist 10 is lifted to a predetermined position, the telescopic member can be automatically inserted into the connection portion of the unit component, thereby reducing manual intervention and reducing the cost of hoisting the offshore wind turbine.

[0078] To improve the automation ability of the hoisting system for an offshore wind turbine generator and reduce labor costs, the hoisting system for an offshore wind turbine generator further includes a controller (not shown in the figure). The controller can control the contraction of the telescopic member according to the detection data of the above-mentioned sensors. When the relative positions of the connecting portion and the connecting member 8 match, the controller can control the telescopic member to extend, so that the extending end is inserted into the above-mentioned connecting portion, realizing the automatic connection of the spreader 10 and reducing labor costs, but not limited thereto.

[0079] In this embodiment, the hoisting system for an offshore wind turbine generator further includes a sensor and a controller. The sensor is used to detect the relative positions of the connecting portion and the connecting member 8. When the connecting member 8 reaches a predetermined position relative to the connecting portion, the controller can control the connecting member 8 to be inserted into the connecting portion. This setting improves the docking efficiency between the connecting member 8 and the components of the wind turbine generator and reduces the assembly cost of the offshore wind turbine generator. In addition, through the cooperation of the sensor and the controller, the reliability of the hoisting system for an offshore wind turbine generator is further improved.

[0080] Continue to refer to Figure 2 , as an example, in this embodiment, a hoisting wheel is arranged at the position of the lifting point 7, and the hoisting cable 3 bypasses the hoisting wheel, thereby reducing the wear of the hoisting cable 3 and increasing the service life of the hoisting cable 3. Optionally, a lifting ring or a lifting hole may be arranged at the position of the lifting point 7, and the free end of the hoisting cable 3 passes through the lifting ring or the lifting hole, but not limited thereto. In this embodiment, two lifting points 7 are arranged at the top of the tower 9 to improve the stability during the movement of the spreader 10, but not limited thereto.

[0081] As an example, the setting position of the lifting point 7 can be adjusted according to the position of the component of the wind turbine generator to be hoisted to avoid the component of the wind turbine generator hitting the tower 9 during hoisting. For example, but not limited to, when a transformer needs to be hoisted, the lifting point 7 can be arranged on the rear frame of the nacelle. When components of the wind turbine generator such as the impeller or the gearbox need to be hoisted, the hoisting system for an offshore wind turbine generator further includes a top hanger 2 (as shown in Figure 3 ), which is used to connect to the rear frame of the nacelle. The lifting point 7 is arranged on the top hanger 2, and the top hanger 2 can extend outward from the rear frame of the nacelle, so that the horizontal distance between the hoisting cable 3 and the tower 9 is increased, thus providing a larger space for the hoisting of the components of the wind turbine generator.

[0082] Continue to refer to Figure 3 , in this embodiment, the top hanger 2 includes a pair of hanger cantilevers 21 that are parallel and spaced apart. The first ends of the pair of hanger cantilevers 21 are connected by an intermediate beam, and the second ends of the pair of hanger cantilevers 21 are formed as free ends. Thus, the pair of hanger cantilevers 21 and the intermediate beam form a "C"-shaped structure, but not limited thereto.

[0083] Continuing to refer to the accompanying drawings, in order to facilitate the top hanger 2 to adjust the center of gravity, the top hanger 2 also includes a pair of hanger telescopic members 22, which are respectively arranged at both ends of the middle beam and are roughly arranged longitudinally, the bottom end of the hanger telescopic member 22 is connected to the middle beam, and a hanger suspension rope 24 is connected between the top of the hanger telescopic member 22 and the free end of the hanger cantilever 21, so that the hanger cantilever 21, the hanger telescopic member 22 and the hanger suspension rope 24 form a triangular structure with a stable structure. In this embodiment, the center of gravity of the top hanger 2 is adjusted by telescoping the hanger telescopic member 22, but it is not limited to this.

[0084] In order to improve the connection reliability between the hanger 10 and the transformer, the telescopic parts are arranged in pairs. A pair of telescopic parts are arranged at the top of the hanger bracket 1 at intervals and facing each other. When the top of the hanger bracket 1 is close to the bottom of the transformer, the pair of telescopic parts extend horizontally and can be inserted into the pin holes. A pair of telescopic parts can be arranged on both sides of the transformer width direction (thickness direction), thereby preventing the hanger 10 from moving relative to the transformer along the width direction (thickness direction), thereby improving the reliability of the connection between the hanger 10 and the transformer.

[0085] In order to further improve the reliability of the offshore wind turbine hoisting system, multiple pairs of telescopic parts are provided, and the multiple pairs of telescopic parts are arranged in parallel and at intervals. When the hoist 10 moves close to the transformer, at least two pairs of telescopic parts can be connected to the transformer, thereby further improving the reliability of the connection between the hoist 10 and the transformer, but not limited to this.

[0086] In this embodiment, the lifting rope 3 is passed around the lifting point 7 on the top of the tower 9. When the lifting winch 4 of the hoisting device 10 is started to reel in the rope, the hoisting device 10 leaves the floating crane 5 and continues to move upward to achieve self-lifting of the hoisting device 10, and the hoisting device 10 is lifted to the top of the tower 9. During the use of the offshore wind turbine hoisting system, there is no need for the installation ship to cooperate in providing stable support, which saves the rental cost of the installation ship and reduces the assembly cost of the offshore wind turbine.

[0087] Reference Figure 4 , Figure 5 as well as Fig.12 , which is different from the first embodiment, in this embodiment, the offshore wind turbine generator system further includes a boom 14 arranged on the hanger bracket 1, one end of the boom 14 is pivotally connected to the hanger bracket 1, and the boom 14 can be pivotally folded on the hanger bracket 1 (such as Figure 4 ), and pivoting relative to the spreader bracket 1 (as shown Figure 5 As shown), and the boom 14 is a telescopic boom.

[0088] In this embodiment, the hanger bracket 1 is connected to the side wall of the tower 9 (such as Figure 5As shown in the figure, during the hoisting process of the unit components, the hoist bracket 1 is not lifted or lowered together with the unit components, thereby reducing the single load weight of the hoisting rope 3.

[0089] Continue to refer to Figure 4 When the sling 10 is not in use, for example but not limited to, during the lifting process of the sling 10 itself, the boom 14 can be folded and set on the sling bracket 1. At this time, the sling 10 has a compact structure, which can avoid scratches with other components during the movement of the sling 10, thereby improving the reliability of the offshore wind turbine hoisting system.

[0090] When the sling 10 is connected to the tower 9 and the sling 10 is used to lift the unit components, the boom 14 can be pivoted from the folded position to the unfolded position, and the posture of the boom 14 is adjusted by swinging the boom 14 relative to the sling bracket 1 to provide space for lifting the unit components, but the present invention is not limited thereto. Furthermore, the boom 14 is configured as a retractable boom, which improves the versatility of the offshore wind turbine hoisting system.

[0091] Continue to refer to Fig.12 , the boom 14 is rotatably connected to the boom bracket 15, and the boom bracket 15 is connected to the hanger bracket 1, but not limited thereto. Further, the hanger 10 also includes a boom driving member 16, a first end of the boom driving member 16 is rotatably connected to the boom 14, and a second end of the boom driving member 16 is rotatably connected to the boom bracket 15, but not limited thereto. Optionally, the boom driving member 16 can be a telescopic member to drive the boom 14 to rotate relative to the boom bracket 15 by changing the length of the boom driving member 16, but not limited thereto. As an example, the boom driving member 16 can be a telescopic cylinder, or a screw assembly, but not limited thereto.

[0092] In this embodiment, the lifting winch 4 is arranged at the first end of the boom 14, the first turning pulley group 104 is rotatably arranged above the boom 14 and close to the first end of the boom 14, the first load-bearing main pulley 106 is rotatably arranged at the second end of the boom 14, and the second turning pulley group 107 is rotatably arranged at the second end of the boom 14 and arranged below the first load-bearing main pulley 106.

[0093] In this embodiment, a plurality of connecting members 8 are provided on the hanger bracket 1, and a plurality of pin holes are provided on the side wall of the tower 9. When the hanger bracket 1 is lifted to a predetermined position, the connecting members 8 can be inserted into the pin holes on the side wall of the tower 9, thereby realizing the connection of the hanger 10 to the side wall of the tower 9 without occupying the installation vessel, thereby saving the rental cost of the installation vessel and reducing the assembly cost of the offshore wind turbine.

[0094] As an example, in this embodiment, the connecting member 8 can be a twist lock, which can rotate between a locked position and an unlocked position. In the initial state, the twist lock can be in the unlocked position, the spreader bracket 1 is lifted to a predetermined position, the twist lock can be inserted into the pin hole, and then the twist lock is rotated to adjust the twist lock to the locked position, so that the twist lock can be locked on the tower 9, so that the spreader 10 can be stably connected to the tower 9, but it is not limited thereto.

[0095] In this embodiment, the sling bracket 1 is initially placed horizontally (on the floating crane) and is arranged longitudinally on the side wall of the tower 9. In this way, during the process of lifting the sling bracket 1 from the floating crane to the top of the tower 9, the sling bracket 1 flips 90°. Compared with the 180° flip of the existing crane, the sling bracket 1 in this embodiment is easy to operate and safer and more reliable.

[0096] Reference Figures 4 to 11 In order to facilitate the posture adjustment of the hoisting device 10 during the lifting or lowering process, the offshore wind turbine generator system in this embodiment further includes a cable wind device 12, and the hoisting device 10 is connected to the floating crane 5 through the cable wind device 12. As an example, the cable wind device 12 can be placed on the floating crane 5, and the cable wind device 12 includes a cable wind winch and a cable wind rope 13. The output end of the cable wind winch is connected to a cable wind winch drum, the first end of the cable wind rope 13 is wound on the cable wind winch drum, and the second end of the cable wind rope 13 can be connected to the hoisting device 10.

[0097] After the cable wind winch is started, the cable wind winch will drive the cable wind winch to rotate. As an example, when the cable wind winch rotates in a clockwise direction, the cable wind rope 13 will gradually be wound around the cable wind winch to achieve the cable wind rope 13. When the cable wind winch rotates in a counterclockwise direction, the cable wind rope 13 will gradually fall off the cable wind winch to achieve the cable wind rope 13. In this way, the posture of the sling 10 in the air is adjusted by the cable wind rope 13 being gathered or let out, but it is not limited to this.

[0098] Continue to refer to Figure 6 As an example, the offshore wind turbine hoisting system also includes two cable wind devices 12, and the two cable wind devices 12 are arranged at intervals. With the cooperation of the two cable wind devices 12, the hoist 10 can be quickly and accurately adjusted to a predetermined posture, but it is not limited to this.

[0099] In this embodiment, the sling bracket 1 extends in the left-right direction, and two cable wind devices 12 are arranged at intervals on the right side of the sling bracket 1, so that the two cable wind devices 12 and the sling 10 form a triangular structure. In this way, when the sling bracket 1 is lifted or lowered, it is convenient for the two cable wind devices 12 to adjust its posture.

[0100] Specifically, refer to Figure 7 and Figure 8The cable wind device 12 includes a frame structure 201, a mobile winch 203, a guide pulley group 206 and a universal pulley group 208, wherein the mobile winch 203 is movably connected to the frame structure 201, the guide pulley group 206 is rotatably connected to the frame structure 201, and the guide pulley group 206 is located above the mobile winch 203, the universal pulley group 208 is rotatably arranged on the frame structure 201, and the universal pulley group 208 is located on the side of the guide pulley group 206 facing the hanger bracket 1, and a tail pulley group 112 is arranged on the hanger bracket 1, one end of the cable wind rope is wound around the cable wind drum of the mobile winch 203, and the other end of the cable wind rope is connected to the tail pulley group 112 after passing through the guide pulley group 206 and the universal pulley group 208 in turn.

[0101] In this embodiment, the frame structure 201 is used as a supporting structure for the mobile winch 203. For example, but not limited to, the frame structure 201 is arranged longitudinally, and a bottom support 205 is provided at the bottom of the frame structure 201. The mobile winch 203 can be firmly connected to the bottom support 205, and the bottom support 205 is fixed to the frame structure 201. In this way, the mobile winch 203 is reliably connected to the frame structure 201, further improving the reliability of the offshore wind turbine hoisting system.

[0102] The frame structure 201 provided by the present invention is arranged longitudinally and occupies less space on the floating crane vessel 5. Compared with a general winch system, it has less spatial distance restrictions, so it can be used for a smaller horizontal distance from the tower 9 and is more suitable for installation in a small space, thereby improving the versatility of the offshore wind turbine hoisting system.

[0103] In this embodiment, the mobile winch 203 is arranged at the bottom of the frame structure 201, the guide pulley group 206 and the universal pulley group 208 are both arranged at the top of the frame structure 201, and the universal pulley group 208 is located on the side of the guide pulley group 206 facing the hanger bracket 1. In this way, the cable wind rope extends upward from the mobile winch 203 in the space of the frame structure 201 to bypass the guide pulley group 206 and then bends to extend toward the universal pulley group 208, thereby improving the space utilization of the cable wind system.

[0104] Continuing to refer to the accompanying drawings, further, the cable wind device also includes a universal pulley bracket 207, which is arranged on the top of the frame structure 201 and protrudes and extends toward one side of the hanger bracket 1. The universal pulley bracket 207 is provided with a limiting through hole 202, and the cable wind rope self-guide pulley group 206 passes through the limiting through hole 202 and is connected to the universal pulley group 208.

[0105] In this embodiment, a limiting through hole 202 is provided in the universal pulley bracket 207, and the wind rope self-guide pulley block 206 passes through the limiting through hole 202 and is connected to the universal pulley block 208, so as to prevent the wind rope from being separated from the guide pulley block 206, thereby further improving the reliability of the offshore wind turbine hoisting system.

[0106] In this embodiment, in order to further improve the applicability of the offshore wind turbine hoisting system, the wind turbine also includes a cabin arranged on the top of the tower 9, the cabin can yaw counterclockwise by a first predetermined angle, and the boom 14 can yaw clockwise by a second predetermined angle relative to the hoist bracket 1, so that the boom 14 can lower the unit components onto the transport ship, or lift the unit components from the transport ship; or, the cabin can yaw clockwise by a third predetermined angle, and the boom 14 can yaw counterclockwise by a fourth predetermined angle relative to the hoist bracket 1, so that the boom 14 can lower the unit components onto the transport ship, or lift the unit components from the transport ship.

[0107] As an example, the first predetermined angle, the second predetermined angle, the third predetermined angle and the fourth predetermined angle are any one of 5°-60° respectively, but are not limited thereto.

[0108] In this embodiment, the nacelle can yaw 45° counterclockwise, the boom 14 can yaw 10° clockwise, and the boom 14 and the nacelle can realize bidirectional rotation, which can reduce the positioning restrictions of the transport ship, thereby further improving the applicability of the offshore wind turbine hoisting system.

[0109] The sling 10 further includes a first turning pulley block 104, a first load-bearing main pulley 106, a second turning pulley block 107, an in-cabin fixed pulley 101, a lifting pulley block 113, and a second load-bearing main pulley 108, which are rotatably connected to the sling bracket 1, wherein the lifting winch 4 is arranged at the first end of the sling bracket 1, the first load-bearing main pulley 106 is arranged at the top of the second end of the sling bracket 1, the first turning pulley block 104 is arranged at the top of the sling bracket 1 and is arranged at intervals between the lifting winch 4 and the first Between the load-bearing main pulley 106, the fixed pulley 101 in the cabin and the lifting pulley group 113 are arranged at the second end of the sling bracket 1, and the fixed pulley 101 in the cabin is located below the first load-bearing main pulley 106, and the lifting pulley group 113 is located below the fixed pulley 101 in the cabin, and the free end of the lifting rope 3 passes through the first turning pulley group 104, and is sequentially wound around the first load-bearing main pulley 106, the second turning pulley group 107, the fixed pulley 101 in the cabin, the lifting pulley group 113, and the second load-bearing main pulley 108.

[0110] With the popularity of large-megawatt wind turbines, the size of turbine components has also increased. The disassembly, assembly and replacement of large-sized turbine components usually require the use of installation vessels. Therefore, the cost of disassembly, assembly and replacement of turbine components has remained high, which in turn leads to high assembly costs and operation and maintenance costs of wind turbines. The present invention provides an offshore wind turbine hoisting method that does not require the use of an installation vessel, thereby saving the rental cost of the installation vessel and reducing the assembly cost of the offshore wind turbine.

[0111] The present disclosure provides a method for hoisting an offshore wind turbine generator set, wherein a hoisting device 10 is placed on a floating crane vessel 5, wherein the hoisting device 10 comprises a hoisting device bracket 1, a hoisting winch 4 fixed to the hoisting device bracket 1, and a hoisting rope 3 wound on a hoisting winch drum, wherein the hoisting device bracket 1 is used as a supporting component of the hoisting device 10, and is used to support components such as the hoisting winch 4 and the hoisting rope 3. The hoisting winch 4 is used to provide power for the hoisting device 10, and specifically, the output shaft of the hoisting winch 4 is connected to the hoisting winch drum, and the hoisting rope 3 is wound on the hoisting winch drum, and the hoisting winch 4 is used to drive the hoisting winch drum to rotate.

[0112] The offshore wind turbine generator set hoisting method provided by the present invention is to place a hoisting device 10 on a floating crane vessel 5; pass the lifting rope 3 of the hoisting device 10 around the lifting point 7 on the top of the tower 9, and connect the free end of the lifting rope 3 to the hoisting device 10; start the lifting winch 4 of the hoisting device 10 to wind the lifting rope 3 and hoist the hoisting device 10 to the top of the tower 9; remove the unit components on the top of the tower 9 and transport them to the floating crane vessel 5 by the hoisting device 10, or install the unit components lifted by the hoisting device 10 on the top of the tower 9.

[0113] The offshore wind turbine generator set hoisting method provided by the present disclosure can lift the hoist 10 itself to the top of the tower 9 without occupying the installation ship, thereby saving the cost of renting the installation ship and reducing the assembly cost of the wind turbine generator set.

[0114] According to an exemplary embodiment of the present disclosure, the steps of removing the unit components on the top of the tower 9 and transporting them to the floating crane 5 by the hoisting device 10 include: connecting the hoisting device 10 to the unit components, then removing the unit components from the top of the tower 9, and driving the lifting winch 4 to release the lifting rope 3, so that the hoisting device bracket 1 carries the unit components back to the floating crane 5.

[0115] Specifically, after the sling 10 is lifted to a high position, the position of the sling 10 is adjusted to get closer to the unit component to be disassembled. For example, but not limited to, the sling 10 is moved below the unit component to be disassembled, and then the sling 10 is connected to the unit component until the sling 10 is firmly connected to the unit component to be disassembled.

[0116] At this time, the lifting rope 3 can be connected to the unit component, and then the unit component is removed from the top of the tower 9, and the lifting winch 4 is driven to release the lifting rope 3, so that the lifting rope 3 is released, and the hoisting device bracket 1 carries the unit component back to the floating crane 5.

[0117] In this embodiment, the hoist 10 is lifted to the top of the tower 9 during the process of retracting the lifting rope 3. At this time, the hoist 10 is connected to the unit components to be disassembled, and then the lifting rope 3 is lowered. The hoist 10 can be lowered along with the unit components to be disassembled. During this process, the hoist 10 is not installed on the tower 9, and there is no need to provide a connection space for the hoist 10. Therefore, it can adapt to wind turbines with compact space on the top of the tower 9 and no connection space for the hoist 10, thereby improving the versatility of the offshore wind turbine hoisting system.

[0118] In this embodiment, the connection between the sling 10 and the unit component to be disassembled can be manually assembled, but is not limited to this. In order to improve the automation capability and reduce labor costs, in this embodiment, the sling 10 includes a connecting piece 8 arranged on the sling bracket 1, and the unit component is provided with a connecting portion connected to the connecting piece 8. When the sling 10 is lifted to the unit component, the connecting piece 8 is driven to extend and connect to the connecting portion.

[0119] For the convenience of description, in this embodiment, the connecting member 8 is a telescopic member (such as Figure 2 As shown in the figure, the connection part of the unit component is a pin hole matching the telescopic part. The fixed end of the telescopic part is connected to the hanger bracket 1, and the extended end of the telescopic part can be extended relative to the hanger bracket 1. When the hanger 10 is lifted to a predetermined position, the telescopic part can be extended toward the pin hole of the unit component and inserted into the pin hole, so that the connection between the hanger 10 and the unit component can be achieved, but it is not limited to this.

[0120] In another optional embodiment, after the sling 10 is lifted to the top of the tower 9 , the sling 10 can be connected to the tower 9 , so that the weight of a single lifting of the lifting rope 3 will not be too large, for example but not limited to, the sling 10 is connected to the side wall of the tower 9 .

[0121] As an example, this embodiment is described by taking the case where the sling 10 is connected to the side wall of the tower 9. The connecting piece 8 on the sling 10 includes a twist lock, and the side wall of the tower 9 is provided with a pin hole matching the twist lock. In the initial state, the twist lock is in an unlocked position. After the sling 10 is lifted to a predetermined height, the posture of the sling 10 is adjusted so that the twist lock is inserted into the pin hole, and then the twist lock is rotated until the twist lock is in a locked position, at which time the sling 10 is connected to the side wall of the tower 9.

[0122] Specifically, the step of installing the unit components lifted by the sling 10 on the top of the tower 9 includes: fixing the sling bracket 1 to the side wall of the tower 9 or the rear frame of the nacelle arranged on the tower 9, so that the sling 10 is connected to the tower 9, so that the sling 10 remains stationary and avoids accidental shaking of the sling 10. Furthermore, by connecting the sling 10 to the tower 9, it is avoided to rent an installation vessel to support the sling 10, thereby saving the rental cost of the installation vessel and reducing the assembly cost of the offshore wind turbine generator set.

[0123] The free end of the lifting rope 3 is connected to the unit component, and the lifting rope 3 is released by driving the lifting winch 4 to lower the lifting rope 3 and transport the unit component to the floating crane 5.

[0124] Compared with the embodiment in which the hoisting device 10 and the unit components are lowered together, in this embodiment, the single carrying weight of the lifting winch 4 will not be too large, the power of the lifting winch 4 is smaller, and the single carrying capacity of the lifting rope 3 can be slightly lower, thereby reducing the cost of the offshore wind turbine hoisting system.

[0125] In order to adjust the posture of the hoisting device 10 during movement, the lifting winch 4 of the hoisting device 10 is started to wind the lifting rope 3 and lift the hoisting device 10 to the top of the tower 9. The hoisting device 10 is connected to the floating crane 5 through a cable wind device, and the posture of the hoisting device 10 in the air is adjusted through the cable wind device.

[0126] Optionally, the step of removing the unit components on the top of the tower 9 and transporting them to the floating crane 5 by the hoist 10 includes: fixing the hoist bracket 1 to the side wall of the tower 9, and using the boom 14 to lift the unit components to the floating crane 5.

[0127] The present disclosure provides a method for hoisting an offshore wind turbine generator set, the offshore wind turbine generator set comprising a tower 9 and a unit component installed on the top of the tower 9, the offshore unit hoisting method comprising: placing a hoist 10 on a floating crane 5, the hoist 10 comprising a hoist bracket 1, a hoisting winch 4 fixed to the hoist bracket 1 and a hoisting rope 3 wound on a winch drum; passing the hoisting rope 3 of the hoist 10 around a hoisting point 7 on the top of the tower 9, and connecting the free end of the hoisting rope 3 to the hoist 10; starting the hoisting winch 4 of the hoist 10 to wind the hoisting rope 3 and hoist the hoist 10 to the top of the tower 9; removing the unit component on the top of the tower 9 and transporting it to the floating crane 5 by the hoist 10, or installing the unit component lifted by the hoist 10 on the top of the tower 9.

[0128] In the present invention, the lifting rope 3 of the lifting device 10 passes around the lifting point 7 on the top of the tower 9, and the free end of the lifting rope 3 is connected to the lifting device 10. When the lifting winch 4 is started, the lifting device 10 can be driven by the lifting rope 3 to move upward and connected to the top of the tower 9. The replacement or installation of offshore unit components does not require the use of an installation vessel, thereby reducing the rental cost of the installation vessel, and also reducing the lifting cost of the offshore unit.

[0129] In order to control the posture adjustment of the lifting device 10 during movement, the cable wind device of the offshore lifting system is connected between the floating crane 5 and the lifting device 10. When the lifting device 10 moves up and down, the cable wind device can adjust the posture of the lifting device 10.

[0130] The first exemplary embodiment of the present disclosure provides an offshore unit hoisting method. After the hoist 10 moves upward to the top of the tower 9, it can be connected to the unit component to be disassembled. For example, but not limited to, the hoist 10 can be connected to a transformer.

[0131] The second exemplary embodiment of the present disclosure provides a method for hoisting an offshore wind turbine generator set. After the hoist 10 moves upward to the top of the tower 9, it can be fixed to the side wall of the tower 9 or the rear frame of the nacelle, thereby fixing the hoist 10 to the top of the tower 9. There is no need to occupy the installation vessel for a long time, saving the rental cost of the installation vessel, thereby reducing the assembly cost of the offshore wind turbine generator set.

[0132] In addition, the offshore wind turbine hoisting method can also be applied to the hoisting and installation of the above-mentioned unit components. First, the transformer is placed on the floating crane 5, the free end of the lifting rope 3 is connected to the transformer, and the lifting winch 4 is started to drive the lifting rope 3 to move and lift the transformer. When the transformer is lifted to the predetermined position, the transformer can be fixed to the operating platform, and then the free end of the lifting rope 3 is separated from the transformer.

[0133] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0134] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0135] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0136] The features, structures or characteristics described in the present disclosure may be combined in one or more embodiments in any suitable manner. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

Claims

1. An offshore wind turbine generator set hoisting system, the offshore wind turbine generator set comprising a tower (9), characterized in that: The offshore wind turbine generator set hoisting system comprises a hoist (10), wherein the hoist (10) comprises a hoist bracket (1), a hoisting winch (4) and a hoisting rope (3), wherein the hoisting winch (4) is used to provide hoisting power, wherein the output end of the hoisting winch (4) is connected to a hoisting drum, wherein the hoisting rope (3) is wound around the hoisting drum, and a hoisting point (7) is arranged at the top of the tower (9), wherein the free end of the hoisting rope (3) can bypass the hoisting point (7) and be connected to the hoist bracket (1), so that the hoist bracket (1) can rise from a floating crane (5) to the top of the tower (9) or fall from the top of the tower (9) to the floating crane (5).

2. The offshore wind turbine hoisting system according to claim 1, characterized in that: The wind turbine generator set further comprises a nacelle arranged on the top of the tower (9) and unit components installed in the nacelle. The hanger (10) further comprises a connecting member (8), wherein the connecting member (8) is arranged on the hanger bracket (1). The machine assembly component is provided with a connecting portion matching the connecting member (8), and the connecting member (8) is connected to the connecting portion, so that the sling (10) is connected to the machine assembly component; or, The rear frame of the nacelle is provided with a connecting portion matching the connecting member (8), and the connecting member (8) is connected to the connecting portion, so that the sling (10) is connected to the rear frame of the nacelle.

3. The offshore wind turbine hoisting system according to claim 2, characterized in that: The connecting member (8) is a telescopic member, the fixed end of the telescopic member is connected to the hanger bracket (1), and the extended end of the telescopic member can be extended relative to the hanger bracket (1) so as to be connected to the connecting portion.

4. The offshore wind turbine hoisting system according to claim 3, characterized in that: The telescopic members are arranged in pairs and at intervals, and the extended ends of the telescopic members are arranged facing each other; or, The offshore wind turbine generator system further comprises a sensor and a controller, wherein the sensor is used to detect the relative position of the connecting portion and the connecting piece (8), and when the connecting piece (8) reaches a predetermined position relative to the connecting portion, the controller can control the connecting piece (8) to be inserted into the connecting portion.

5. The offshore wind turbine generator system as claimed in claim 1, characterized in that: The wind turbine generator set further comprises a nacelle arranged on the top of the tower (9) and unit components installed in the nacelle, the hanger (10) further comprises a connecting piece (8), the connecting piece (8) is arranged on the hanger bracket (1), the side wall of the tower (9) is provided with a connecting portion matching the connecting piece (8), and the hanger (10) is connected to the side wall of the tower (9) by connecting the connecting piece (8) to the connecting portion.

6. The offshore wind turbine hoisting system according to claim 5, characterized in that: The connecting member (8) is a twist lock that can rotate between an unlocked position and a locked position. The connecting portion is a pin hole that matches the twist lock. When the twist lock is inserted into the pin hole and adjusted to the locked position, the sling (10) is connected to the connecting portion.

7. The offshore wind turbine hoisting system according to claim 1, characterized in that: The offshore wind turbine generator set further comprises a nacelle mounted on the top of the tower (9), a rear frame of the nacelle, and a plurality of unit components mounted on the rear frame of the nacelle. The offshore wind turbine generator set hoisting system further comprises a hoisting point (7), and the hoisting winch (3) of the hoisting winch (4) can pass around the hoisting point (7), wherein: The suspension point (7) is arranged on the rear frame of the cabin; or, The offshore wind turbine generator set hoisting system further comprises a top hanger (2) for connecting to the rear frame of the nacelle, and the hoisting point (7) is arranged on the top hanger (2).

8. The offshore wind turbine hoisting system according to any one of claims 1 to 7, characterized in that: The offshore wind turbine generator set hoisting system further comprises a cable wind device (12), and the hoisting device (10) is connected to the floating crane (5) via the cable wind device (12).

9. The offshore wind turbine hoisting system according to claim 8, characterized in that: The cable wind device (12) comprises a frame structure (201), a movable winch (203), a guide pulley block (206) and a universal pulley block (208), wherein the movable winch (203) is movably connected to the frame structure (201), the guide pulley block (206) is rotatably connected to the frame structure (201), and the guide pulley block (206) is located above the movable winch (203), and the universal pulley block (208) is rotatably connected to the frame structure (201). The frame structure (201) is arranged on the frame structure (201), and the universal pulley block (208) is located on the side of the guide pulley block (206) facing the sling bracket (1). The sling bracket (1) is provided with a tail pulley block (112). One end of the cable wind rope is wound around the cable wind drum of the mobile winch (203), and the other end of the cable wind rope is connected to the tail pulley block (112) after passing through the guide pulley block (206) and the universal pulley block (208) in sequence.

10. The offshore wind turbine generator system as claimed in claim 9, characterized in that: The wind cable device further comprises a universal pulley bracket (207), wherein the universal pulley bracket (207) is arranged on the top of the frame structure (201) and protrudes and extends toward one side of the hanger bracket (1), and the universal pulley bracket (207) is provided with a limiting through hole (202), and the wind cable rope passes through the limiting through hole (202) from the guide pulley block (206) and is connected to the universal pulley block (208).

11. The offshore wind turbine generator system as claimed in claim 2, characterized in that: The offshore wind turbine generator set hoisting system further comprises a boom (14) arranged on the hoisting bracket (1), one end of the boom (14) being pivotally connected to the hoisting bracket (1), the boom (14) being capable of being pivotally folded on the hoisting bracket (1) and pivotally unfolded relative to the hoisting bracket (1), and the boom (14) being a retractable boom.

12. The offshore wind turbine generator system as claimed in claim 11, characterized in that: The wind turbine generator set further comprises a nacelle arranged on the top of the tower (9), the nacelle being capable of yaw counterclockwise at a first predetermined angle, and the boom (14) being capable of yaw clockwise at a second predetermined angle relative to the hanger bracket (1), so that the boom (14) is capable of lowering the unit components onto a transport ship, or lifting the unit components from the transport ship; or, The nacelle is capable of yaw clockwise at a third predetermined angle, and the boom (14) is capable of yaw counterclockwise at a fourth predetermined angle relative to the hanger bracket (1), so that the boom (14) is capable of lowering the unit components onto a transport ship, or lifting the unit components from the transport ship.

13. The offshore wind turbine hoisting system according to any one of claims 1 to 7, characterized in that: The sling (10) further comprises a first turning pulley block (104), a first load-bearing main pulley (106), a second turning pulley block (107), an in-cabin fixed pulley (101), a lifting pulley block (113), and a second load-bearing main pulley (108) rotatably connected to the sling bracket (1), wherein the lifting winch (4) is arranged at the first end of the sling bracket (1), the first load-bearing main pulley (106) is arranged at the top of the second end of the sling bracket (1), the first turning pulley block (104) is arranged at the top of the sling bracket (1) and is arranged at intervals between the lifting winch (4) and the first load-bearing main pulley (106). The fixed pulley (101) in the cabin and the lifting pulley group (113) are arranged at the second end of the sling bracket (1), and the fixed pulley (101) in the cabin is located below the first load-bearing main pulley (106), and the lifting pulley group (113) is located below the fixed pulley (101) in the cabin, and the free end of the lifting rope (3) passes through the first turning pulley group (104) and is sequentially wound around the first load-bearing main pulley (106), the second turning pulley group (107), the fixed pulley (101) in the cabin, the lifting pulley group (113), and the second load-bearing main pulley (108).

14. The offshore wind turbine hoisting system according to claim 2, characterized in that: The unit components include a generator, a transformer, a gear box, a blade, or an impeller.

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