Fan blade replacing device

Abstract

The utility model provides a fan blade replacing device which comprises an on-tower crane which is installed on a cabin of a fan and comprises a base and a suspension arm, the suspension arm can rotate relative to the base, the pitching angle of the suspension arm can be adjusted, the suspension arm is connected with a lifting hook, and the suspension arm can lift or lower the lifting hook; the blade lifting appliance comprises a lifting beam, the lifting beam is connected with a lifting hook, and a length-adjustable connecting rope is arranged on the lifting beam; the blade fixing structure comprises a net cover and a fixing buckle arranged on the net cover; the net sleeve is in a net shape and sleeves the blades to fix the blades, and the fixing buckles are connected with the connecting ropes. When the blade is replaced, the net cover wraps the blade, the posture of the blade is adjusted by adjusting the releasing length of the connecting rope, and the lifting hook is lowered by the lifting arm to drive the blade to be lowered. According to the utility model, under the condition that large hoisting equipment is not used, the hoisting of the blade is completed; and the hoisting process is more convenient, quicker and more efficient.

Description

Technical Field

[0001] This utility model belongs to the field of wind power generation technology, and in particular relates to a wind turbine blade replacement device. Background Technology

[0002] A wind turbine typically consists of a tower fixed to the ground, a nacelle mounted on top of the tower, a hub mounted on the nacelle, and blades mounted on the hub. With the increasing installed capacity of wind turbines and the growing service life of wind turbines, some damaged parts of wind turbines need to be replaced, especially the blades.

[0003] Due to the weight of the blades and the height of the towers, wind turbine blade replacement is currently typically performed using large truck cranes. Large-megawatt high-tower wind turbines require crawler cranes, while offshore wind turbines necessitate the use of outrigger boats. However, the use of large lifting equipment not only incurs high lifting costs but is also subject to environmental constraints. Therefore, it is necessary to provide a wind turbine blade replacement device. Utility Model Content

[0004] This utility model provides a wind turbine blade replacement device to realize the hoisting and replacement of wind turbine blades.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A wind turbine blade replacement device, comprising:

[0007] A tower crane, installed on the nacelle of a wind turbine, includes a base and a boom. The boom can rotate relative to the base, and the boom can adjust its pitch angle relative to the base. The boom is connected to a hook, and the boom can raise or lower the hook.

[0008] A blade lifting device includes a lifting beam connected to a hook, and an adjustable-length connecting rope is provided on the lifting beam;

[0009] A blade fixing structure includes a mesh sleeve and a fixing buckle disposed on the mesh sleeve; the mesh sleeve is a mesh-like structure that is fitted over the blade to fix the blade, and the fixing buckle is connected to the connecting rope;

[0010] When replacing the blade, the net covers the blade, and the posture of the blade is adjusted by adjusting the length of the connecting rope. The boom lowers the hook to lower the blade.

[0011] Preferably, the lifting beam is provided with multiple adjustment mechanisms; each of the multiple adjustment mechanisms is connected to the connecting rope, and the adjustment mechanism adjusts the release length of the connecting rope.

[0012] Preferably, the adjustment mechanism includes a rope drum and a drive member, the connecting rope is connected to the rope drum, the drive member is connected to the rope drum to drive the rope drum to rotate, and the rope drum tightens or releases the connecting rope to adjust the release length of the connecting rope.

[0013] Preferably, the adjustment mechanism comprises at least three sets, including a first adjustment mechanism, a second adjustment mechanism, and a third adjustment mechanism arranged sequentially, wherein the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism are respectively connected to a first connecting rope, a second connecting rope, and a third connecting rope.

[0014] Preferably, the netting is provided with at least three fixing buckles, including a first fixing buckle, a second fixing buckle and a third fixing buckle, wherein the first fixing buckle, the second fixing buckle and the third fixing buckle are respectively connected to the first connecting rope, the second connecting rope and the third connecting rope.

[0015] Preferably, the first fixing buckle and the third fixing buckle are located at the lower part of the net sleeve, and the second fixing buckle is located at the upper part of the net sleeve. The second fixing buckle is located between the first fixing buckle and the third fixing buckle in the lateral position. When the net sleeve is fitted onto the blade, the second fixing buckle is located on one side of the center of gravity of the blade in the longitudinal position, and the first fixing buckle and the third fixing buckle are located on the other side of the center of gravity of the blade.

[0016] Preferably, the base includes a base and a turntable. The base is fixed to the engine room, the turntable is disposed on the base and can rotate relative to the base, the boom is disposed on the turntable, and a hydraulic cylinder is disposed between the boom and the turntable. The pitch angle of the boom is adjusted by extending and retracting the hydraulic cylinder.

[0017] Preferably, the tower crane further includes a wire rope and a power unit. The wire rope connects the hook, the boom, and the power unit. The power unit tightens or releases the wire rope to raise or lower the hook.

[0018] Preferably, the lifting beam is provided with a connecting hole, and a lifting rope is provided in the connecting hole, the lifting rope being connected to the lifting hook.

[0019] Preferably, the driving component is a motor.

[0020] Compared with the prior art, the technical solution of this utility model embodiment has beneficial effects.

[0021] For example, the wind turbine blade replacement device of this utility model includes: a tower crane installed on the nacelle of the wind turbine, including a base and a boom, the boom being rotatable relative to the base, the boom's pitch angle being adjustable, a hook connected to the boom, and the boom being able to raise or lower the hook; a blade lifting device including a lifting beam with an adjustable-length connecting rope on the beam; and a blade fixing structure including a mesh sleeve and fixing buckles on the mesh sleeve; the mesh sleeve is fitted over the blade to fix it, and the fixing buckles are connected to the connecting rope; when replacing the blade, the mesh sleeve covers the blade, and the blade's posture is adjusted by adjusting the length of the connecting rope, and the boom lowers the hook to lower the blade; the blade can be lifted without using large lifting equipment; the lifting process is more convenient, faster, and more efficient;

[0022] For example, this utility model provides an adjustment mechanism on the lifting beam. The adjustment mechanism includes a rope drum and a driving component. The connecting rope is connected to the rope drum, and the driving component is connected to the rope drum to drive the rope drum to rotate. The rope drum tightens or releases the connecting rope to adjust the release length of the connecting rope. By adjusting the release length of multiple connecting ropes connected by multiple adjustment mechanisms, the blade's attitude can be adjusted in a convenient manner, which facilitates the lifting of the blade. Attached Figure Description

[0023] Figure 1 This is an installation side view of the wind turbine blade replacement device in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the installation of the wind turbine blade replacement device in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the tower crane structure in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the blade lifting device structure in an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the blade fixing structure in an embodiment of this utility model;

[0028] Figure 6 This is a schematic diagram of the blade hoisting process in an embodiment of this utility model;

[0029] Figure 7 This is another schematic diagram of the blade hoisting process in an embodiment of this utility model;

[0030] Figure 8 This is a schematic diagram of the blade lowering process in an embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Fan; 11. Nacelle;

[0033] 2. Tower crane; 21. Base; 211. Base plate; 212. Turntable; 22. Boom; 23. Hook; 24. Hydraulic cylinder; 25. Wire rope;

[0034] 3. Blade lifting device; 31. Lifting beam; 311. Connecting hole; 32. Lifting rope; 33. Adjusting mechanism; 331. Rope drum; 332. Driving component; 333. First adjusting mechanism; 334. Second adjusting mechanism; 335. Third adjusting mechanism; 34. Connecting rope; 341. First connecting rope; 342. Second connecting rope; 343. Third connecting rope;

[0035] 4. Blade fixing structure; 41. Net sleeve; 42. Fixing buckle; 421. First fixing buckle; 422. Second fixing buckle; 423. Third fixing buckle;

[0036] 5. Leaves. Detailed Implementation

[0037] To make the objectives, features, and beneficial effects of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described below are merely for explaining this utility model and are not intended to limit it. Furthermore, the same or similar reference numerals may be used in the drawings to refer to the same or similar elements in different embodiments, and descriptions of the same or similar elements in different embodiments, as well as descriptions of prior art elements, features, effects, etc., may be omitted.

[0038] Reference Figures 1 to 8 This utility model provides a fan blade replacement device.

[0039] Specifically, the wind turbine blade replacement device includes:

[0040] The tower crane 2 is installed on the nacelle 11 of the wind turbine 1. It includes a base 21 and a boom 22. The boom 22 can rotate relative to the base 21. The boom 22 can adjust its pitch angle relative to the base 21. The boom 22 is connected to a hook 23. The boom 22 can raise or lower the hook 23.

[0041] The blade lifting device 3 includes a lifting beam 31, a lifting hook 23 connected to the lifting beam 31, and an adjustable length connecting rope 34 provided on the lifting beam 31.

[0042] The blade fixing structure 4 includes a mesh sleeve 41 and a fixing buckle 42 disposed on the mesh sleeve 41; the mesh sleeve 42 is mesh-shaped and is fitted over the blade 5 to fix the blade 5; the fixing buckle 42 is connected to the connecting rope 34.

[0043] When replacing blade 5, the net sleeve 41 covers blade 5, and the posture of blade 5 is adjusted by adjusting the length of the connecting rope 34. The boom 22 lowers the hook 23 to lower blade 5.

[0044] In some embodiments, the lifting beam 31 is provided with a plurality of adjustment mechanisms 33; the adjustment mechanism 33 is connected to a connecting rope 34, and the adjustment mechanism 33 adjusts the release length of the connecting rope 34.

[0045] Specifically, there are multiple sets of adjustment mechanisms 33, which are connected to multiple connecting ropes 34; there are multiple fixing buckles 42 on the net sleeve 41, and the multiple fixing buckles 42 are connected to multiple connecting ropes 34 respectively.

[0046] In some embodiments, the adjustment mechanism 33 includes a rope drum 331 and a drive member 332. A connecting rope 34 is connected to the rope drum 331, and the drive member 332 is connected to the rope drum 331 to drive the rope drum 331 to rotate. The rope drum 331 tightens or releases the connecting rope 34 to adjust the length of the connecting rope 34.

[0047] In some embodiments, the drive element 332 is a motor.

[0048] In some embodiments, the adjustment mechanism 33 is at least three groups, including a first adjustment mechanism 333, a second adjustment mechanism 334 and a third adjustment mechanism 335 arranged in sequence, wherein the first adjustment mechanism 333, the second adjustment mechanism 334 and the third adjustment mechanism 335 are respectively connected to the first connecting rope 341, the second connecting rope 342 and the third connecting rope 343.

[0049] In some embodiments, the net sleeve 41 is provided with at least three fixing buckles 42, including a first fixing buckle 421, a second fixing buckle 422 and a third fixing buckle 423, the first fixing buckle 421, the second fixing buckle 422 and the third fixing buckle 423 respectively connecting to the first connecting rope 341, the second connecting rope 342 and the third connecting rope 343.

[0050] In some embodiments, the first fixing buckle 421 and the third fixing buckle 423 are located at the lower part of the net sleeve 41, and the second fixing buckle 422 is located at the upper part of the net sleeve 41. The second fixing buckle 422 is located between the first fixing buckle 421 and the third fixing buckle 423 in the lateral (x-axis direction) position.

[0051] In some embodiments, when the mesh sleeve 41 is fitted onto the blade 5, the second fixing buckle 422 is located on one side of the center of gravity of the blade 5 in the longitudinal (y-axis direction), and the first fixing buckle 421 and the third fixing buckle 423 are located on the other side of the center of gravity of the blade 5.

[0052] In some embodiments, the base 21 includes a base 211 and a turntable 212. The base 211 is fixed to the cabin 11, the turntable 212 is disposed on the base 211 and can rotate relative to the base 211, the boom 22 is disposed on the turntable 212, and a hydraulic cylinder 24 is disposed between the boom 22 and the turntable 212. The pitch angle of the boom 22 is adjusted by the extension and retraction of the hydraulic cylinder 24.

[0053] In some embodiments, the tower crane 2 further includes a wire rope 25 and a power unit. The wire rope 25 connects the hook 23, the boom 22 and the power unit. The power unit tightens or releases the wire rope 25 to raise or lower the hook 23.

[0054] In some embodiments, the lifting beam 31 is provided with a connecting hole 311, and a lifting rope 32 is provided in the connecting hole 311, and the lifting rope 32 is connected to the lifting hook 23.

[0055] To better understand the technical solution provided by the embodiments of this utility model, the process of disassembling and lowering the blade 5 connected to the hub using the device is further described below, including the following steps:

[0056] The boom 22 of the tower crane 2 lowers the hook 23, the hook 23 is connected to the blade lifting device 3, and the blade lifting device 3 is connected to the blade fixing structure 4;

[0057] The boom 22 lifts the hook 23, which in turn lifts the blade lifting device 3 and the blade fixing structure 4, while the blade fixing structure 4 covers the blade 5.

[0058] Adjust the adjustment structure 33, tighten or release the connecting rope 34, so that the blade lifting device 3 and the blade fixing structure 4 adapt to the current position and attitude of the blade 5, and the blade 5 maintains its current position and attitude after it separates from the hub.

[0059] Disassemble the connecting piece between blade 5 and hub to separate blade 5 from hub;

[0060] Adjust the rotation and pitch angles of the boom 22, and adjust the height of the hook 23; leave enough space for the blade 5 to adjust its attitude;

[0061] Adjust the adjustment structure 33, tighten or release the connecting rope 34, and adjust the attitude of the blade 5 so that the blade 5 is set laterally (x-axis direction);

[0062] Specifically, by adjusting the lengths of the second connecting rope 342 and / or simultaneously adjusting the lengths of the first connecting rope 341 and the third connecting rope 343, the blade 5 is adjusted to rotate around the x-axis; by adjusting the lengths of the first connecting rope 341 and / or the third connecting rope 343, the blade 5 is adjusted to rotate around the y-axis.

[0063] The boom 22 lowers the hook 23, which in turn lowers the blade lifting device 3, the blade fixing structure 4, and the blade 5 to the ground or platform.

[0064] Specifically, the method of lifting the blades 5, which are placed horizontally on the ground or platform, to connect the wind turbine 1 to the hub is the reverse of the method of disassembling and lowering the blades 5 connected to the hub, and will not be described in detail here.

[0065] In summary, the wind turbine blade replacement device provided by this utility model includes: a tower crane 2, installed on the nacelle 11 of the wind turbine 1, including a base 21 and a boom 22, the boom 22 being rotatable relative to the base 21, the boom 22 being adjustable in pitch relative to the base 21, the boom 22 being connected to a hook 23, and the boom 22 being able to raise or lower the hook 23; a blade lifting device 3, including a lifting beam 31, the lifting beam 31 being connected to the hook 23, and the lifting beam 31 being provided with an adjustable length connecting rope 34; the blade... The blade fixing structure 4 includes a mesh sleeve 41 and a fixing buckle 42 set on the mesh sleeve 41; the mesh sleeve 42 is fitted over the blade 5 to fix the blade 5, and the fixing buckle 42 is connected to the connecting rope 34; when replacing the blade 5, the mesh sleeve 41 covers the blade 5, and the posture of the blade 5 is adjusted by adjusting the length of the connecting rope 34, and the boom 22 lowers the hook 23 to drive the blade 5 down; the blade can be lifted without the use of large lifting equipment; the lifting process is more convenient, faster and more efficient.

[0066] For example, this utility model provides an adjustment mechanism 33 on the lifting beam 31. The adjustment mechanism 33 includes a rope drum 331 and a driving member 332. The connecting rope 34 is connected to the rope drum 331, and the driving member 332 is connected to the rope drum 331 to drive the rope drum 331 to rotate. The rope drum 331 tightens or releases the connecting rope 331 to adjust the release length of the connecting rope 331. By adjusting the release length of multiple connecting ropes 34 connected by multiple adjustment mechanisms 33, the attitude adjustment of the blade 5 can be easily realized, which facilitates the hoisting of the blade 5.

[0067] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of this utility model disclosure, even when only a single embodiment is described with respect to a particular feature. The feature examples provided in this utility model disclosure are intended to be illustrative and not limiting, unless otherwise stated. In practice, one or more technical features of the dependent claims may be combined with the technical features of the independent claims as needed and where technically feasible, and may be derived from the technical features of the respective independent claims in any suitable manner rather than solely by the specific combinations listed in the claims.

Claims

1. A wind turbine blade replacement device, characterized in that, include: A tower crane, installed on the nacelle of a wind turbine, includes a base and a boom. The boom can rotate relative to the base, and the boom can adjust its pitch angle relative to the base. The boom is connected to a hook, and the boom can raise or lower the hook. A blade lifting device includes a lifting beam connected to a hook, and an adjustable-length connecting rope is provided on the lifting beam; The blade fixing structure includes a net sleeve and a fixing buckle disposed on the net sleeve; the net sleeve is a mesh-like structure that is fitted over the blade to fix the blade, and the fixing buckle is connected to the connecting rope; when replacing the blade, the net sleeve covers the blade, and the posture of the blade is adjusted by adjusting the length of the extended connecting rope, and the hook of the boom is lowered to drive the blade to lower.

2. The wind turbine blade replacement device according to claim 1, characterized in that, The lifting beam is equipped with multiple adjustment mechanisms; each of the multiple adjustment mechanisms is connected to the connecting rope, and the adjustment mechanism adjusts the release length of the connecting rope.

3. The wind turbine blade replacement device according to claim 2, characterized in that, The adjustment mechanism includes a rope drum and a drive unit. The connecting rope is connected to the rope drum, and the drive unit is connected to the rope drum to drive the rope drum to rotate. The rope drum tightens or releases the connecting rope to adjust the length of the connecting rope.

4. The wind turbine blade replacement device according to claim 2, characterized in that, The adjustment mechanism comprises at least three sets, including a first adjustment mechanism, a second adjustment mechanism, and a third adjustment mechanism arranged sequentially, wherein the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism are respectively connected to the first connecting rope, the second connecting rope, and the third connecting rope.

5. The wind turbine blade replacement device according to claim 4, characterized in that, The netting is provided with at least three fixing buckles, including a first fixing buckle, a second fixing buckle and a third fixing buckle, which are respectively connected to the first connecting rope, the second connecting rope and the third connecting rope.

6. The wind turbine blade replacement device according to claim 5, characterized in that, The first and third fixing buckles are located at the lower part of the net sleeve, and the second fixing buckle is located at the upper part of the net sleeve. The second fixing buckle is located between the first and third fixing buckles in the lateral position. When the net sleeve is fitted onto the blade, the second fixing buckle is located on one side of the center of gravity of the blade in the longitudinal position, and the first and third fixing buckles are located on the other side of the center of gravity of the blade.

7. The wind turbine blade replacement device according to claim 1, characterized in that, The base includes a base and a turntable. The base is fixed to the engine room, the turntable is mounted on the base and can rotate relative to the base, the boom is mounted on the turntable, and a hydraulic cylinder is provided between the boom and the turntable. The pitch angle of the boom is adjusted by extending and retracting the hydraulic cylinder.

8. The wind turbine blade replacement device according to claim 1, characterized in that, The tower crane also includes a wire rope and a power unit. The wire rope connects the hook, the boom, and the power unit. The power unit tightens or releases the wire rope to raise or lower the hook.

9. The wind turbine blade replacement device according to claim 1, characterized in that, The lifting beam is provided with a connecting hole, and a lifting rope is installed in the connecting hole. The lifting rope is connected to the lifting hook.

10. The wind turbine blade replacement device according to claim 3, characterized in that, The driving component is a motor.

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