Offshore wind turbine component replacement device and method

Abstract

The invention provides an offshore wind turbine component replacement device and method.The offshore wind turbine component replacement device comprises an arm frame, a first end and a second end, the first end is provided with a hinge mechanism, and the hinge mechanism is fixedly connected with a wind turbine and allows the arm frame to rotate relative to the wind turbine; the second end part is provided with a hoisting bracket, and the hoisting bracket is provided with a hoisting tool for hoisting a heavy object; the driving mechanism is used for driving the arm support to rotate and comprises a power unit, a traction rope and an on-tower support, the power unit is fixedly arranged on the under-tower structure of the fan, the on-tower support is arranged in a cabin of the fan, and the traction rope is connected with the power unit, the on-tower support and the second end part; the power unit tensions or releases the traction rope to drive the arm frame to rotate, and the pitching angle of the arm frame is adjusted. When the heavy object is lifted, the lifting appliance lifts the heavy object, the power unit tightens the traction rope, the arm frame is driven to rotate in the direction close to the draught fan till the lifting support reaches the position above the cabin, and the lifting appliance lowers the heavy object to the cabin.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and particularly relates to an offshore wind turbine component replacement device and method. Background Art

[0002] With the increasing installation capacity of wind turbines and the growing service life of wind turbines year by year, components of wind turbine generators need to be replaced. Since the components are very heavy and the height of the tower barrel is relatively high, a leg boat is required for replacing components of offshore wind turbines. However, using a leg boat incurs high lifting costs and is easily affected by wind and waves. Therefore, it is necessary to provide an offshore wind turbine component replacement device and method. Summary of the Invention

[0003] The present invention provides an offshore wind turbine component replacement device and method to achieve the hoisting and replacement of wind turbine components.

[0004] To achieve the above object, the present invention provides the following technical solutions.

[0005] An offshore wind turbine component replacement device includes: A boom having a first end and a second end. The first end is provided with a hinge mechanism which is fixedly connected to the wind turbine and allows the boom to rotate relative to the wind turbine; the second end is provided with a lifting support, and a lifting tool for lifting heavy objects is arranged on the lifting support; A driving mechanism for driving the boom to rotate, including a power unit, a towing rope and a tower upper support. The power unit is fixedly arranged on the lower tower structure of the wind turbine, the tower upper support is arranged in the nacelle of the wind turbine, and the towing rope connects the power unit, the tower upper support and the second end; the power unit tightens or releases the towing rope to drive the boom to rotate and adjust the pitching angle of the boom; The lifting tool includes a mounting component, a hook component, a steel wire rope and a winch. The winch tightens or releases the steel wire rope to lift or lower heavy objects; When lifting a heavy object, the lifting tool lifts the heavy object, the power unit tightens the towing rope, drives the boom to rotate towards the direction close to the wind turbine until the lifting support reaches above the nacelle, and the lifting tool lowers the heavy object into the nacelle.

[0006] Preferably, there are two groups of the driving mechanisms which are respectively connected to both sides of the second end. The driving mechanism further includes a first pulley group and a second pulley group. The first pulley group is arranged on the tower upper support, the second pulley group is arranged on one side of the second end, one end of the towing rope is connected to the power unit, and the other end bypasses the first pulley group and is connected to the second pulley group.

[0007] Preferably, the installation assembly is installed on the lifting bracket. The steel wire rope is connected to the hook assembly, the installation assembly and the winch, and the hook assembly is connected to the heavy object.

[0008] Preferably, the installation assembly includes an installation frame and an upper pulley set arranged in the installation frame. The installation assembly can move and rotate on the lifting bracket; the hook assembly includes a lower pulley set and a hook; one end of the steel wire rope is connected to the winch, and the other end bypasses the upper pulley set and is connected to the lower pulley set, and the hook is connected to the heavy object.

[0009] Preferably, the second end is provided with a through hole corresponding to the lifting bracket, allowing the heavy object to pass through when the lifting tool lifts or lowers the heavy object.

[0010] Preferably, the rotation angle of the boom relative to the horizontal plane satisfies the following formula:

[0011] where, is the rotation angle of the boom relative to the horizontal plane; is the weight of the heavy object; is the weight of the boom; is the distance from the suspension point of the heavy object to the hinge point between the boom and the wind turbine; is the distance from the center of gravity of the boom to the hinge point between the boom and the wind turbine; is the angle between the line connecting the center of gravity of the boom and the hinge point between the boom and the wind turbine and the line connecting the suspension point of the heavy object and the hinge point between the boom and the wind turbine.

[0012] Preferably, the hinge mechanism is fixed on the tower structure under the wind turbine through a fixing block.

[0013] Preferably, the power unit is a winch or a hoist.

[0014] Based on the same concept, the present invention also provides an operation method of the above-mentioned offshore wind turbine component replacement device, which is characterized by including the following steps: Drive the power unit to tighten or release the towing rope to drive the boom to rotate, adjust the boom angle so that the through hole of the boom is located above the ship loading the heavy object; Adjust the position of the ship loading the heavy object so that the heavy object is directly below the through hole; Drive the winch to release the steel wire rope and lower the hook to the heavy object to connect the heavy object; Drive the winch to tighten the steel wire rope, drive the heavy object to be lifted through the through hole and rise above the boom; Drive the power unit to tighten the towing rope to drive the boom to rotate so that the lifting bracket is located above the nacelle, and release the steel wire rope to lower the heavy object to the nacelle.

[0015] Preferably, the installation component can move on the lifting bracket; before the lifting wire rope is released to lower the heavy object to the nacelle, the following steps are further included: The driving power unit tightens or releases the towing rope to adjust the angle of the boom and adjust the lateral position of the heavy object falling into the nacelle; Move the installation component, adjust the position of the installation component on the lifting bracket, and further adjust the longitudinal position of the heavy object falling into the nacelle.

[0016] Compared with the prior art, the technical solution of the embodiment of the present invention has beneficial effects.

[0017] For example, the offshore wind turbine component replacement device of the present invention includes: a boom having a first end and a second end. The first end is provided with a hinge mechanism, and the hinge mechanism is fixedly connected to the wind turbine, allowing the boom to rotate relative to the wind turbine; the second end is provided with a lifting bracket, and the lifting bracket is provided with a lifting tool for lifting a heavy object; a driving mechanism for driving the boom to rotate, including a power unit, a towing rope, and a tower upper support. The power unit is fixedly arranged on the tower lower structure of the wind turbine, the tower upper support is arranged in the nacelle of the wind turbine, and the towing rope connects the power unit, the tower upper support, and the second end; the power unit tightens or releases the towing rope to drive the boom to rotate and adjust the pitching angle of the boom; when lifting a heavy object, the lifting tool lifts the heavy object, the power unit tightens the towing rope, drives the boom to rotate towards the direction close to the wind turbine until the lifting bracket reaches above the nacelle, and the lifting tool lowers the heavy object to the nacelle; it does not rely on a support ship to realize the hoisting of the heavy object to the nacelle; the boom only depends on the wind turbine and is not affected by ships or waves, etc. The lifting tool is more stable, safe, and efficient when hoisting components; For another example, when the installation component is installed on the lifting bracket, it is set to be movable and rotatable, which is convenient for adjusting the lateral position of the heavy object falling into the nacelle and is beneficial to the accurate placement of the heavy object; For another example, the present invention calculates the maximum angle that the boom can rotate according to the structure of the boom, the weight of the boom, and the weight of the heavy object, so as to avoid the boom leaning against or hitting the wind turbine when the boom rotates beyond the maximum angle, causing damage; For another example, the present invention provides a through hole corresponding to the lifting bracket at the second end of the boom, allowing the heavy object to pass through when the lifting tool hoists or lowers the heavy object, which is convenient for the hoisting or lowering of the heavy object. Description of the Drawings

[0018] Figure 1 is a schematic diagram when the boom of the offshore wind turbine component replacement device in the embodiment of the present invention is horizontal; Figure 2 is a side view when the boom of the offshore wind turbine component replacement device in the embodiment of the present invention is horizontal; Figure 3 is a side view when the boom of the offshore wind turbine component replacement device in the embodiment of the present invention rotates to the middle position; Figure 4It is a side view when the boom of the offshore wind turbine component replacement device in the embodiment of the present invention rotates to a high position; Figure 5 It is a schematic diagram of the spreader lifting a heavy object when the boom is horizontal in the embodiment of the present invention; Figure 6 It is a schematic diagram of the spreader lifting a heavy object when the boom rotates to a high position in the embodiment of the present invention; Figure 7 It is a schematic diagram of the connection between the first end of the boom and the wind turbine in the embodiment of the present invention; Figure 8 It is a schematic diagram of the spreader lifting a heavy object through the through hole in the embodiment of the present invention; Figure 9 It is a schematic diagram of the force on the boom when the boom rotates to a high position in the embodiment of the present invention; Figure 10 It is a schematic diagram of moment balance when the boom rotates to a high position in the embodiment of the present invention.

[0019] Explanation of reference numerals: 1, wind turbine; 11, structure under the tower; 12, nacelle; 2, boom; 21, first end; 22, second end; 221, through hole; 23, hinge mechanism; 24, lifting bracket; 25, fixing block; 3, drive mechanism; 31, power unit; 32, towing rope; 33, upper support on the tower; 34, first pulley block; 35, second pulley block; 4, spreader; 41, installation component; 411, installation frame; 412, upper pulley block; 42, hook component; 421, lower pulley block; 422, hook; 43, steel wire rope; 44, winch; 5, heavy object. Detailed implementation manners

[0020] To make the objectives, features and beneficial effects of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. It can be understood that the following described detailed implementation manners are only used to explain the present invention, rather than limiting the present invention. And in the drawings, the same or similar reference numerals may be used to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the elements, features, effects, etc. of the prior art may also be omitted.

[0021] Refer to Figures 1 to 10 , the embodiment of the present invention provides an offshore wind turbine component replacement device.

[0022] Specifically, the offshore wind turbine component replacement device includes: The boom 2 has a first end 21 and a second end 22. The first end 21 is provided with a hinge mechanism 23 which is fixedly connected to the wind turbine 1, allowing the boom 2 to rotate relative to the wind turbine 1. The second end 22 is provided with a lifting bracket 24, and a lifting device 4 for lifting a heavy object 5 is arranged on the lifting bracket 24. The driving mechanism 3 is used to drive the boom 2 to rotate. It includes a power unit 31, a traction rope 32 and a tower upper support 33. The power unit 31 is fixedly arranged on the tower lower structure 11 of the wind turbine 1. The tower upper support 33 is arranged on the nacelle 12 of the wind turbine 1. The traction rope 32 connects the power unit 31, the tower upper support 33 and the second end 22. The power unit 31 tightens or releases the traction rope 32 to drive the boom 2 to rotate and adjust the pitching angle of the boom 2. The lifting device 4 includes a mounting assembly 41, a hook assembly 42, a steel wire rope 43 and a winch 44. The winch 44 tightens or releases the steel wire rope 43 to lift or lower the heavy object 5. When lifting the heavy object 5, the lifting device 4 lifts the heavy object 5. The power unit 31 tightens the traction rope 32, driving the boom 2 to rotate towards the direction close to the wind turbine 1 until the lifting bracket 24 reaches above the nacelle 12, and then the lifting device 4 lowers the heavy object 5 to the nacelle 12. It can realize the hoisting of the heavy object 5 to the nacelle 12 without relying on a leg boat. The boom 2 only depends on the wind turbine 1 and is not affected by ships or waves, etc. The lifting device 4 is more stable, safe and efficient when hoisting components.

[0023] In some embodiments, there are two sets of driving mechanisms 3 which are respectively connected to both sides of the second end 22. The driving mechanism 3 further includes a first pulley group 34 and a second pulley group 35. The first pulley group 34 is arranged on the tower upper support 33, and the second pulley group 35 is arranged on one side of the second end 22. One end of the traction rope 32 is connected to the power unit 31, and the other end bypasses the first pulley group 34 and is connected to the second pulley group 35. The traction rope 32 passes around the first pulley group 34 and the second pulley group 35 multiple times, reducing the load of the traction rope 32, improving safety and extending the service life of the traction rope 32.

[0024] In some embodiments, the mounting assembly 41 is mounted on the lifting bracket 24. The steel wire rope 43 connects the hook assembly 42, the mounting assembly 41 and the winch 44, and the hook assembly 42 is connected to the heavy object 5.

[0025] In some embodiments, the mounting assembly 41 includes a mounting frame 411 and an upper pulley group 412 arranged in the mounting frame 411. The mounting assembly 41 can move and rotate on the lifting bracket 24. The hook assembly 42 includes a lower pulley group 421 and a hook 422. One end of the steel wire rope 43 is connected to the winch 44, and the other end bypasses the upper pulley group 412 and is connected to the lower pulley group 421. The hook 422 is connected to the heavy object 5.

[0026] Specifically, the winch 44 is provided at the second end 22, or the winch 44 is provided on the tower lower structure 11. A guide pulley is provided at the second end 22, and the steel wire rope 43 is connected to the winch 44 via the guide pulley.

[0027] Specifically, the mounting assembly 41 can rotate on the lifting support 24. When the boom 2 rotates, under the action of the gravity of the heavy object 5, the mounting assembly 41 can be pulled to rotate around the lifting support, so that the hook assembly 42 is always in a vertically downward posture.

[0028] Specifically, the mounting assembly 41 can be driven to move on the lifting support 24 by a moving drive structure (not shown). The moving drive structure can adopt a turbine screw drive or a hydraulic cylinder drive, or a similar mechanism that can achieve this function, which is not limited here.

[0029] See Figure 8 , in some embodiments, a through hole 221 is provided at the second end 22 corresponding to the lifting support 24, allowing the heavy object 5 to pass through when the lifting device 4 lifts or lowers the heavy object 5; when lowering the heavy object, there is no need to first transfer the heavy object 5 to the second end 22, and the heavy object 5 can be directly transferred to the ship below the through hole 221; when lifting the heavy object 5, it can also be directly lifted from the ship below the through hole 221.

[0030] In some embodiments, the rotation angle of the boom 2 relative to the horizontal plane satisfies the following formula:

[0031] Wherein, is the rotation angle of the boom 2 relative to the horizontal plane; is the weight of the heavy object 5; is the weight of the boom 2; is the distance from the suspension point of the heavy object 5 to the hinge point between the boom 2 and the wind turbine 1; is the distance from the center of gravity of the boom 2 to the hinge point between the boom 2 and the wind turbine 1; is the included angle between the line connecting the center of gravity of the boom 2 and the hinge point between the boom 2 and the wind turbine 1 and the line connecting the suspension point of the heavy object 5 and the hinge point between the boom 2 and the wind turbine 1.

[0032] See Figure 9 and Figure 10 , specifically, when the boom 2 is erected, since the towing rope 32 can only provide tensile force and cannot provide thrust, to ensure that the boom 2 does not fall towards the wind turbine 1 side, the following formula needs to be satisfied when the tensile force of the towing rope 32 is greater than 0:

[0033] It is deduced that:

[0034] Wherein, is the weight of the heavy object 5; is the horizontal distance from the center of gravity of the heavy object 5 to the hinge point between the boom 2 and the wind turbine 1; is the weight of the boom 2; is the horizontal distance from the center of gravity of the boom 2 to the hinge point between the boom 2 and the wind turbine 1; is the tension of the towing rope 32, is the vertical distance from the force application point of the towing rope 32 to the hinge point between the boom 2 and the wind turbine 1; For a given boom 2 and heavy object 5, the following relationship is satisfied:

[0035] It is deduced that:

[0036] It is required that , that is, it is necessary to satisfy

[0037] It is deduced that:

[0038] Wherein, is the rotation angle of the boom 2 relative to the horizontal plane; is the weight of the heavy object 5; is the weight of the boom 2; is the distance from the suspension point of the heavy object 5 to the hinge point between the boom 2 and the wind turbine 1; is the distance from the center of gravity of the boom 2 to the hinge point between the boom 2 and the wind turbine 1; is the included angle between the line connecting the center of gravity of the boom 2 and the hinge point between the boom 2 and the wind turbine 1 and the line connecting the suspension point of the heavy object 5 and the hinge point between the boom 2 and the wind turbine 1.

[0039] In some embodiments, the hinge mechanism 23 is fixed on the tower structure 11 of the wind turbine 1 through the fixing block 25.

[0040] In some embodiments, the power unit 31 is a winch or a hoist.

[0041] The present invention also provides an operation method for a device for replacing components of an offshore wind turbine, which hoists the heavy object 5 on a ship to the nacelle 12 of the wind turbine 1, and includes the following steps: Drive the power unit 31 to tighten or release the towing rope 32 to drive the boom 2 to rotate, adjust the angle of the boom 2, so that the through hole 221 of the boom 2 is located above the ship loading the heavy object; Adjust the position of the ship loading the heavy object so that the heavy object 5 is located directly below the through hole 221; The driving winch 44 releases the steel wire rope 43, lowers the hook 422 to the heavy object 5 and connects to the heavy object 5; The driving winch 44 tightens the steel wire rope 43, drives the heavy object 5 to be lifted through the through hole 221, and rises above the boom 2; The driving power unit 31 tightens the towing rope 32 to drive the boom 2 to rotate, so that the lifting bracket 24 is located above the nacelle 12, and the steel wire rope 43 is released to lower the heavy object 5 to the nacelle 12.

[0042] In some embodiments, the mounting assembly 41 can move on the lifting bracket 24; before the steel wire rope 43 is released to lower the heavy object 5 to the nacelle 12, the following steps are further included: The driving power unit 31 tightens or releases the towing rope 32 to adjust the angle of the boom 2, and adjusts the lateral position (the width direction of the nacelle 12) of the heavy object 5 falling into the nacelle 12; The mounting assembly 41 is moved to adjust the position of the mounting assembly 41 on the lifting bracket 24, thereby adjusting the longitudinal position (the length direction of the nacelle 12) of the heavy object 5 falling into the nacelle 12.

[0043] Specifically, the method of lifting the component (heavy object 5) to be replaced in the nacelle 12 of the wind turbine 1 to the ship is the reverse of the method of lifting the heavy object 5 on the ship to the nacelle 12 of the wind turbine 1, which will not be elaborated here.

[0044] Specifically, in some embodiments, when the boom 2 is in the horizontal position, the hook 422 may not lift the heavy object 5. When the boom 2 rotates towards the wind turbine 1 to a certain angle, the driving winch 44 releases the steel wire rope 43, lowers the hook 422 to the heavy object 5 and connects to the heavy object 5, and then lifts the heavy object 5.

[0045] In summary, the offshore wind turbine component replacement device and method provided by the present invention include: a boom 2 having a first end 21 and a second end 22. The first end 21 is provided with a hinge mechanism 23 which is fixedly connected to the wind turbine 1, allowing the boom 2 to rotate relative to the wind turbine 1; the second end 22 is provided with a lifting bracket 24, and a lifting tool 4 for lifting heavy objects is arranged on the lifting bracket 24; a driving mechanism 3 for driving the rotation of the boom 2, including a power unit 31, a towing rope 32 and a tower upper support 33. The power unit 31 is fixedly arranged on the lower tower structure 11 of the wind turbine 1, the tower upper support 33 is arranged on the nacelle 12 of the wind turbine 1, and the towing rope 32 connects the power unit 31, the tower upper support 33 and the second end 22; the power unit 31 tightens or releases the towing rope 32 to drive the rotation of the boom 2 and adjust the pitching angle of the boom 2; when lifting a heavy object 5, the lifting tool 4 lifts the heavy object 5, and the power unit 31 tightens the towing rope 32 to drive the boom 2 to rotate towards the direction close to the wind turbine 1 until the lifting bracket 24 reaches above the nacelle 12, and then the lifting tool 4 lowers the heavy object 5 into the nacelle 12; it does not rely on a support ship to realize the hoisting of the heavy object 5 to the nacelle 12; the boom 2 only depends on the wind turbine 1 and is not affected by ships or waves, etc., and the lifting tool 4 is more stable, safe and efficient when hoisting components.

[0046] Further, when the mounting assembly 41 of the present invention is installed on the lifting bracket 24, it is set to be movable and rotatable, which is convenient for adjusting the lateral position of the heavy object 5 falling into the nacelle 12 and is beneficial to the accurate placement of the heavy object 5.

[0047] Further, the present invention calculates the maximum angle that the boom 2 can rotate according to the structure of the boom 2, the weight of the boom 2 and the weight of the heavy object 5, so as to avoid the boom 2 leaning against or hitting the wind turbine 1 when the boom 2 rotates beyond the maximum angle, causing damage.

[0048] Further, a through hole 221 is provided at the second end 22 of the boom 2 corresponding to the lifting bracket 24, allowing the heavy object 5 to pass through when the lifting tool 4 hoists or lowers the heavy object 5, which is convenient for the hoisting or lowering of the heavy object 5.

[0049] Although the specific implementation schemes have been described above, these implementation schemes are not intended to limit the scope of the present invention disclosure, even in the case of describing a single implementation scheme only with respect to specific features. The feature examples provided in the present invention disclosure are intended for illustration rather than limitation, unless otherwise stated. In specific implementations, according to actual requirements and when technically feasible, the technical features of one or more dependent claims can be combined with the technical features of the independent claim, and can be combined in any appropriate way rather than only through the specific combinations listed in the claims from the technical features of the corresponding independent claims.

Claims

1. An offshore wind turbine component replacement device, characterized in that: include: The arm has a first end and a second end, the first end is provided with a hinge mechanism, the hinge mechanism is fixedly connected to the fan, and allows the arm to rotate relative to the fan; the second end is provided with a lifting bracket, and the lifting bracket is provided with a lifting device for lifting heavy objects; A driving mechanism, used for driving the boom to rotate, comprises a power unit, a traction rope and a tower support, wherein the power unit is fixedly arranged on the tower structure below the wind turbine, the tower support is arranged on the nacelle of the wind turbine, and the traction rope connects the power unit, the tower support and the second end; the power unit tightens or releases the traction rope to drive the boom to rotate, thereby adjusting the pitch angle of the boom; The sling comprises a mounting assembly, a hook assembly, a steel wire rope and a winch, and the winch tightens or releases the steel wire rope to lift or lower a heavy object; When lifting a heavy object, the sling lifts the heavy object, the power unit tightens the traction rope, and drives the arm to rotate in a direction close to the wind turbine until the lifting bracket reaches above the cabin, and the sling lowers the heavy object to the cabin.

2. The offshore wind turbine component replacement device according to claim 1, characterized in that: The driving mechanism consists of two groups and is respectively connected to the two sides of the second end. The driving mechanism also includes a first pulley group and a second pulley group. The first pulley group is arranged on the support on the tower, and the second pulley group is arranged on one side of the second end. One end of the traction rope is connected to the power unit, and the other end passes around the first pulley group and is connected to the second pulley group.

3. The offshore wind turbine component replacement device according to claim 1, characterized in that: The installation assembly is installed on the lifting bracket, the steel wire rope connects the hook assembly, the installation assembly and the winch, and the hook assembly is connected to the heavy object.

4. The offshore wind turbine component replacement device according to claim 3, characterized in that: The mounting assembly includes a mounting frame and an upper pulley block arranged in the mounting frame, and the mounting assembly can move and rotate on the lifting bracket; the hook assembly includes a lower pulley block and a hook; one end of the wire rope is connected to the winch, and the other end passes through the upper pulley block and is connected to the lower pulley block, and the hook is connected to a heavy object.

5. The offshore wind turbine component replacement device according to claim 1, characterized in that: The second end portion is provided with a through hole corresponding to the lifting bracket, allowing the heavy object to pass through when the lifting device lifts or lowers the heavy object.

6. The offshore wind turbine component replacement device according to claim 1, characterized in that: The rotation angle of the arm relative to the horizontal plane satisfies the following formula: in, is the rotation angle of the boom relative to the horizontal plane; is the weight of the heavy object; is the weight of the boom; It is the distance from the lifting point of the heavy object to the hinge point between the boom and the fan; It is the distance from the center of gravity of the boom to the hinge point between the boom and the wind turbine; It is the angle between the line connecting the center of gravity of the boom and the hinge point between the boom and the fan and the line connecting the heavy object hanging point and the hinge point between the boom and the fan.

7. The offshore wind turbine component replacement device according to claim 1, characterized in that: The hinge mechanism is fixed on the lower tower structure of the fan through a fixing block.

8. The offshore wind turbine component replacement device according to claim 1, characterized in that: The power unit is a winch or a winch.

9. An operating method of an offshore wind turbine component replacement device according to any one of claims 1 to 8, characterized in that: The steps include: The driving power unit tightens or releases the traction rope to drive the boom to rotate, and adjusts the angle of the boom so that the through hole of the boom is located above the vessel loaded with heavy objects; Adjust the position of the boat loaded with the weight so that the weight is directly under the passage hole; Drive the winch to release the wire rope and lower the hook to the heavy object to connect with the heavy object; The winch is driven to tighten the wire rope, driving the heavy object to be hoisted through the through hole and rise to the top of the boom; The driving power unit tightens the traction rope to drive the boom to rotate, so that the lifting bracket is located above the cabin, and the wire rope is released to lower the heavy object into the cabin.

10. The method for operating an offshore wind turbine component replacement device according to claim 9, characterized in that: The installation assembly can be moved on the lifting bracket; before releasing the wire rope to lower the heavy object into the cabin, the following steps are also included: The driving power unit tightens or releases the traction rope to adjust the angle of the boom and the lateral position of the heavy object in the cabin; The installation assembly is moved to adjust the position of the installation assembly on the lifting bracket, thereby adjusting the longitudinal position of the heavy object falling in the cabin.

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