A replacement tool for offshore wind turbine maintenance

Abstract

The application provides a replacement tool for offshore wind turbine maintenance, and relates to the technical field of wind turbine operation and maintenance, which comprises a first crane, a second crane, a third crane, a fourth crane and a plurality of standard sections. The outer side of the crane chassis is vertically provided with a plurality of standard sections which are sequentially spliced. The first crane is arranged on the top of the crane chassis, the second crane is arranged on the top of the uppermost standard section, the third crane is detachably arranged on the outer side of a standard section, and the fourth crane is arranged on the outer side of the crane chassis. The third crane, the second crane and the fourth crane are located on the same side of the first crane. The device adopts multi-crane staged assembly and layered operation, which effectively improves the maintenance efficiency.

Description

Technical Field

[0001] This invention relates to the field of wind turbine operation and maintenance technology, and in particular to a replacement tooling for the maintenance of offshore wind turbines. Background Technology

[0002] In the replacement of large components (such as gearboxes and generators) of offshore wind turbines, special cranes are usually installed inside the wind turbine nacelle to replace large ground cranes to complete the component hoisting operation, thereby reducing operation and maintenance costs and shortening the construction cycle. Chinese patent document with publication number CN222540335U discloses a crane for replacing wind turbine components. The installation of multiple cranes in the wind turbine nacelle usually adopts their own independent base or support structure, and each crane is connected to the nacelle floor plate by bolts.

[0003] This installation method suffers from a lack of structural connection between the crane bases and requires a large floor space. Summary of the Invention

[0004] The purpose of this invention is to provide a replacement tooling for the maintenance of offshore wind turbines, so as to solve the technical problems of high construction difficulty and inconvenient maintenance in the prior art.

[0005] To solve the above problems, the replacement tooling for offshore wind turbine maintenance involved in this invention adopts the following technical solution: The present invention provides a replacement tooling for the maintenance of offshore wind turbines, including a first crane, a second crane, a third crane, a fourth crane, and multiple standard sections. Multiple standard sections are vertically arranged on the outer side of the crane base frame. The first crane is installed on the top of the crane base frame, the second crane is installed on the top of the uppermost standard section, the third crane is detachably installed on the outer side of a standard section, and the fourth crane is installed on the outer side of the crane base frame. The third crane, the second crane, and the fourth crane are located on the same side as the first crane.

[0006] Preferably, it also includes a connecting seat and a nacelle bearing seat. The connecting seat is located between the nacelle bearing seat and one of the legs of the crane base frame. The connecting seat includes a first part and a second part that are integrally connected. The first part is sandwiched between the bottom surface of the leg of the crane base frame and the top surface of the nacelle bearing seat. The first part has a vertically through clearance space. The crane base frame is connected to the nacelle bearing seat through a connecting component that passes through the clearance space. The first part is connected to the nacelle bearing seat. The second part extends outward to the outside of the crane base frame. Multiple standard sections that are vertically spliced ​​are installed on the top surface of the second part.

[0007] Preferably, the connecting assembly includes a first stud, a nut, a sleeve, and a second stud. The second stud is fixed on the engine room bearing seat, and the operating end of the second stud extends out of the upper side of the engine room bearing seat. The first stud passes through the crane base frame, and both ends of the first stud extend out of the crane base frame. The two ends of the sleeve are respectively threaded to the operating end of the second stud and the lower end of the first stud. The upper end of the first stud is threaded to the nut, and the nut abuts against the crane base frame. The sleeve is located within the clearance position of the first part.

[0008] Preferably, the crane base frame includes a base frame body and support legs assembled around the bottom of the base frame body. The bottom side wall of the support leg is recessed inward to provide an operating space. A first stud is inserted into the support leg, with its two ends respectively extending out of the bottom of the support leg and into the operating space of the support leg. A nut is screwed to the upper end of the first stud and placed in the operating space.

[0009] Preferably, the fourth crane includes a slewing support mechanism, a boom, a luffing cylinder, a connecting arm, an electrical control box, and a winch. The slewing support mechanism is pin-connected to the crane base frame. The root of the boom is hinged to the slewing support mechanism. A guide wheel is hinged to the front end of the boom. The cylinder body of the luffing cylinder is fixed to the slewing support mechanism. The other end of the piston rod of the luffing cylinder is plugged into one end of the connecting arm. The other end of the connecting arm is hinged to the boom. The electrical control box is installed on the slewing support mechanism and located on both sides of the boom. The winch is installed above the boom. The wire rope extending from the winch passes through the guide wheel to the front end of the boom.

[0010] The beneficial effects of this invention are as follows: This invention provides a replacement tooling for offshore wind turbine maintenance. Compared with existing technologies, it can complete the lifting and assembly of components of the top first crane step by step through the coordinated operation of the second, third, and fourth cranes. It eliminates the need for large crane vessels to directly lift the large-tonnage main crane as a whole. Furthermore, the four cranes are arranged at intervals along the same side, which avoids interference in the working space and allows for the simultaneous completion of multiple processes such as main lifting, component alignment, material transfer, and low-altitude transport. This reduces the auxiliary time for repeatedly adjusting the lifting points of a single crane and significantly improves the efficiency of maintenance operations. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below: Figure 1 This is a schematic diagram of the crane's underframe structure; Figure 2 A schematic diagram of the installation structure for the engine room bearing housing and the crane base frame; Figure 3 for Figure 1 A partial view.

[0012] In the diagram: 1. First crane; 2. Second crane; 3. Third crane; 41. Slewing support mechanism; 42. Boom; 43. Luffing cylinder; 44. Connecting boom; 45. Electrical control box; 421. Guide wheel; 422. Winch; 5. Crane base frame; 51. Base frame body; 52. Outrigger; 6. Standard section; 7. Connecting seat; 9. Connecting assembly; 91. First stud; 92. Locking nut; 93. Adjusting sleeve; 94. Second stud; 10. Nacelle bearing seat. Detailed Implementation

[0013] To make the technical objectives, technical solutions, and beneficial effects of the present invention clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] The present invention provides a replacement tooling for the maintenance of offshore wind turbines, as shown in the figure, including a first crane 1, a second crane 2, a third crane 3, a fourth crane, a crane base frame 5, multiple standard sections 6, a connecting seat 7, and a nacelle bearing seat.

[0015] The crane base frame 5 is the main load-bearing base of the tooling, including the base frame body 51 and multiple support legs 52 fixed around the bottom of the base frame body 51. Typically, four support legs 52 are set to correspond to the four corners of the base frame to achieve uniform load distribution. The lower side wall of the support leg 52 is recessed inward to form an operating space 521, and the opening of the operating space 521 faces the outside of the support leg so that the operator can reach the tool.

[0016] Any outrigger of the crane base frame 5 is connected to the nacelle bearing seat. The connecting seat includes an integrally connected first part and a second part. The first part is sandwiched between the bottom surface of the outrigger and the top surface of the nacelle bearing seat 10. The first part 71 has a vertically penetrating clearance space. The crane base frame 5 is fastened to the nacelle bearing seat through the connecting component inserted in the clearance space. The first part itself is fixed to the nacelle bearing seat by bolts. The second part extends horizontally outward from the side of the first part to the outside of the crane base frame 5. The bottom of the vertically spliced ​​multi-section standard section is fixedly installed on the top surface of the second part.

[0017] Multiple standard sections 6 are vertically spliced ​​together and set as a whole on the outside of the crane base frame 5. The third crane 3 is detachably set on the outside of one of the standard sections 6, and the installation height can be adjusted as needed. It is used for the installation and lifting of the second crane 2 and the lifting of small parts. The second crane 2 is installed on the top of the uppermost standard section 6 and is used for the lifting of the fourth crane and smaller parts. The fourth crane is installed on the outside of the crane base frame 5 and is used for the lifting of the first crane 1 and larger parts. The first crane 1 is fixedly installed on the top of the crane base frame 5 and is the main crane of the tooling. The boom swing range covers the main working area inside the engine room and is used for lifting heavy core components such as gearboxes and generators. The third crane 3, the second crane 2, and the fourth crane are arranged on the same side of the first crane 1 to improve the efficiency of collaborative operation. At the same time, the other side of the first crane 1 is kept unobstructed and can be used as an access passage for large parts.

[0018] Furthermore, the heights of the first crane 1, the fourth crane, the second crane 2, and the third crane 3 are set in a tiered, lowered configuration. This tooling employs a four-crane tiered, collaborative layout, covering the entire operating range from high to low. It allows for simultaneous multi-process operations such as component alignment and material transfer, significantly shortening the maintenance cycle of offshore wind turbines. Simultaneously, the lower-level cranes can work in stages to lift and assemble the main crane's components, eliminating the need for a large crane vessel for overall lifting and reducing the difficulty and cost of high-altitude installation of the main crane.

[0019] The connecting component 9 includes a first stud, a locking nut, an adjusting sleeve, and a second stud. The second stud is a bolt (existing technology) that is vertically pre-installed on the nacelle bearing seat and used for bolt fixing between the nacelle bearing seat and the nacelle floor plate. Its upper end is the operating end and extends out of the upper surface of the nacelle bearing seat. This device integrates the installation foundation (connecting seat) of the crane base frame 5 and the standard section 6 on the same anchoring point, sharing the original bolts of the nacelle bearing seat, without the need for additional modification of the wind turbine body structure. Specifically, the first stud is vertically inserted into the support leg 52 of the crane base frame, with its lower end protruding from the bottom surface of the support leg 52 and its upper end extending into the operating space 521. Its diameter matches that of the second stud. The adjusting sleeve is a tubular component with internal threads on its inner wall. Its upper and lower ends are threadedly connected to the operating end of the second stud and the lower end of the first stud, respectively. The locking nut is located in the operating space and is threadedly connected to the upper end of the first bolt, and is pressed against the support leg. The adjusting sleeve is housed in the clearance space of the first part 71. The clearance space also provides working space for the sleeve to rotate. A removable protective cover can be added to the opening of the operating space 521 and closed after installation.

[0020] In the above, the number and position of the first bolt are the same as the number and position of the second bolt in the corresponding clearance position. The second bolt outside the clearance position can pass through the first part and be located above the first part before being fastened by a nut.

[0021] Furthermore, the fourth crane includes a slewing support mechanism 41, a boom 42, a luffing cylinder 43, a connecting arm 44, an electrical control box 45, and a winch 422. The slewing support mechanism 41 adopts a turntable bearing structure, enabling 360° rotation. Its base is connected to the crane base frame 5 via a pin, facilitating quick assembly and disassembly. The root of the boom 42 is hinged to the slewing support mechanism 41, and a guide wheel 421 is hinged to its front end. The cylinder body of the luffing cylinder 43 is fixed to the slewing support mechanism 41, and the piston rod end is connected to... One end of the connecting arm 44 is connected by a pin-type plug-in connection, and the other end of the connecting arm 44 is hinged to the boom body of the boom 42. The boom 42 is driven to complete the luffing action by the extension and retraction of the luffing cylinder 43. There are two electrical control boxes 45, which are symmetrically installed on the slewing support mechanism 41 and placed on both sides of the boom 42. The winch 422 is installed above the boom 42, and the wire rope 423 it leads out extends along the boom, and after being reversed by the guide wheel 421, it extends to the front end of the boom 42 for connecting the hook and the load.

[0022] The two adjacent standard sections 6 are inserted and fixed with bolts. The standard section 6 is made of steel pipe or steel profile welded together. The bottom of the third crane 3 is equipped with an installation platform, which is fixed to the side wall of the standard section 6 with bolts.

[0023] Furthermore, the first stud and the second stud have opposite thread directions, and the upper and lower thread directions of the inner wall of the adjusting sleeve are also correspondingly opposite, with a smooth transition section between the two thread sections.

[0024] The first crane 1 and / or the fourth crane adopts a folding boom crane or a telescopic boom crane. When not in operation, the boom can be folded or retracted to reduce the space occupied in the cabin and leave more working space for personnel operation and other equipment.

[0025] Finally, it should be noted that the above embodiments are only for illustration and not for limiting the technical solutions of the present invention. Any equivalent substitutions, modifications or partial substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A replacement tooling for offshore wind turbine maintenance, characterized in that, It includes a first crane, a second crane, a third crane, a fourth crane, and multiple standard sections. Multiple standard sections are vertically arranged on the outside of the crane base frame and spliced ​​together in sequence. The first crane is installed on the top of the crane base frame, the second crane is installed on the top of the uppermost standard section, the third crane is detachably installed on the outside of a standard section, and the fourth crane is installed on the outside of the crane base frame. The third crane, the second crane, and the fourth crane are located on the same side as the first crane.

2. The replacement tooling for offshore wind turbine maintenance according to claim 1, characterized in that, It also includes a connecting seat and a nacelle bearing seat. The connecting seat is located between the nacelle bearing seat and one of the legs of the crane base frame. The connecting seat includes a first part and a second part that are integrally connected. The first part is sandwiched between the bottom surface of the leg of the crane base frame and the top surface of the nacelle bearing seat. The first part has a vertically through clearance space. The crane base frame is connected to the nacelle bearing seat through a connecting component that passes through the clearance space. The first part is connected to the nacelle bearing seat. The second part extends outward to the outside of the crane base frame. Multiple standard sections that are vertically spliced ​​are installed on the top surface of the second part.

3. The replacement tooling for offshore wind turbine maintenance according to claim 2, characterized in that... The connecting assembly includes a first stud, a nut, a sleeve, and a second stud. The second stud is fixed on the engine room bearing housing, and the operating end of the second stud extends out of the upper side of the engine room bearing housing. The first stud passes through the crane base frame, and both ends of the first stud extend out of the crane base frame. The two ends of the sleeve are respectively threaded to the operating end of the second stud and the lower end of the first stud. The upper end of the first stud is threaded to the nut, and the nut abuts against the crane base frame. The sleeve is located within the clearance position of the first part.

4. The replacement tooling for offshore wind turbine maintenance according to claim 3, characterized in that... The crane base frame includes a base frame body and support legs assembled around the bottom of the base frame body. The bottom side wall of the support leg is recessed inward to provide an operating space. A first stud is inserted into the support leg, with its two ends respectively protruding from the bottom of the support leg and into the operating space of the support leg. A nut is screwed to the upper end of the first stud and placed in the operating space.

5. A replacement tooling for offshore wind turbine maintenance according to claim 4, characterized in that... The fourth crane includes a slewing support mechanism, a boom, a luffing cylinder, a connecting arm, an electrical control box, and a winch. The slewing support mechanism is pin-connected to the crane base frame. The base of the boom is hinged to the slewing support mechanism. A guide wheel is hinged to the front end of the boom. The cylinder body of the luffing cylinder is fixed to the slewing support mechanism. The other end of the piston rod of the luffing cylinder is plugged into one end of the connecting arm. The other end of the connecting arm is hinged to the boom. The electrical control box is installed on the slewing support mechanism and located on both sides of the boom. The winch is installed above the boom. The wire rope extending from the winch passes through the guide wheel to the front end of the boom.

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