Replacement equipment for blades of wind driven generator

Abstract

The utility model relates to the technical field of wind power operation and maintenance, and provides replacement equipment for blades of a wind driven generator, the replacement equipment comprises a first fixed assembly, a movable assembly, a first steel wire rope and a driving assembly, the first fixed assembly is used for being arranged on a variable pitch bearing; the movable assembly is used for being arranged on the blade and provided with a movable pulley, and the movable pulley is located below the first fixing assembly. The first end of the first steel wire rope is fixed to the first fixing assembly. The second end of the first steel wire rope is wound around the movable pulley and coupled with the driving assembly which is used for controlling the first steel wire rope to move. The replacement equipment for the blades of the wind driven generator is used for solving the problems that in the prior art, blade replacement depends on a large crane or a crawler crane, and the requirement for a construction site is strict, and through the synergistic effect of the first fixing assembly, the movable assembly, the first steel wire rope and the driving assembly, the blade replacement efficiency is improved. And the strict requirements of traditional hoisting on site space and equipment tonnage can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of wind power operation and maintenance technology, and in particular to a device for replacing wind turbine blades. Background Technology

[0002] Wind turbine blades are key components of wind power equipment and a primary indicator of the design and technological level of wind turbine units. During long-term operation, blades are prone to damage due to factors such as aging, extreme weather, or insufficient maintenance, necessitating replacement. Currently, conventional replacement processes require high-altitude flipping operations during blade transport due to their large size and weight, placing high demands on hoisting equipment and construction sites. Generally, only large cranes or crawler cranes can be used for blade disassembly and installation. However, mountainous wind farms often face problems such as inconvenient transportation and limited space, making it difficult for large cranes to access the site. This typically requires road construction and site preparation, leading to a surge in construction costs and extended timelines. Therefore, the blade replacement device urgently needs optimization and improvement. Utility Model Content

[0003] This utility model provides a device for replacing wind turbine blades, which solves the problems of reliance on large cranes or crawler cranes for blade replacement in the prior art, as well as the strict requirements for construction sites. Through the synergistic effect of the first fixed component, the movable component, the first wire rope and the drive component, the strict requirements of traditional hoisting on site space and equipment tonnage can be reduced.

[0004] The present invention provides a device for replacing wind turbine blades, comprising:

[0005] The first fixed component is used for mounting on the pitch bearing;

[0006] A movable component is provided for mounting on the blade, the movable component being equipped with a movable pulley located below the first fixed component;

[0007] A first steel wire rope, the first end of which is fixed to the first fixing component;

[0008] A drive assembly is provided, wherein the second end of the first wire rope is wound around the movable pulley and coupled to the drive assembly, and the drive assembly is used to control the movement of the first wire rope.

[0009] According to the replacement device for wind turbine blades provided by this utility model, the drive assembly is used to be installed on the blade, the pitch bearing, or the ground;

[0010] When the drive assembly is located on the blade or the ground, the first fixing assembly includes a fixed joint and a first fixed pulley spaced apart, the movable pulley is located between the fixed joint and the first fixed pulley, the first end of the first wire rope is fixed to the fixed joint, and the second end of the first wire rope is sequentially wound around the movable pulley and the first fixed pulley and coupled to the drive assembly.

[0011] According to the wind turbine blade replacement device provided by this utility model, the drive assembly includes a winch component, the winch component comprising:

[0012] Mounting base frame for installation on the ground;

[0013] The first winch is rotatably mounted on the mounting base, and the second end of the first wire rope is fixed to the first winch;

[0014] A first motor is connected to the first winch, and the first motor is used to drive the first winch to rotate.

[0015] According to the wind turbine blade replacement device provided by this utility model, the first winch includes:

[0016] A reel is rotatably mounted on the mounting base;

[0017] A brake disc is located at one end of the drum;

[0018] The hoisting component also includes:

[0019] The first clamping member is located on one side of the brake disc;

[0020] The second clamping member is located on the other side of the brake disc;

[0021] A driving component, connected to the first clamping member and / or the second clamping member, is used to control the spacing between the first clamping member and the second clamping member.

[0022] According to the wind turbine blade replacement device provided by this utility model, the first fixing component further includes a second fixed pulley;

[0023] The hoisting component also includes:

[0024] The second winch is rotatably mounted on the mounting base;

[0025] The second motor is connected to the second winch;

[0026] The second wire rope has a first end connected to the second winch and a second end wound around the second fixed pulley. The second winch is used to control the second end of the second wire rope to move vertically under the drive of the second motor.

[0027] According to the wind turbine blade replacement device provided by this utility model, the drive assembly includes:

[0028] A hoist is used to fix the hoist to the pitch bearing, the blade, or the ground; the second end of the first wire rope is passed through the hoist, and the hoist is used to control the movement of the first wire rope;

[0029] A rope winding component is disposed on the path of the first wire rope on one side of the lower rope outlet of the hoist. The rope winding component is used to wind up and unwind the first wire rope.

[0030] According to the replacement device for wind turbine blades provided by this utility model, the movable component further includes several clamping components, several pulley mounting components and several pads. The clamping components and the pulley mounting components are connected along a pre-set annular path to form a clamping structure. The clamping structure is used to be fitted onto the root of the blade.

[0031] The movable pulley is disposed on the pulley mounting component, and the pad is used to connect the clamp component and the pulley mounting component; when two clamp components are connected, the pad is also used to connect the clamp component and the adjacent clamp component; when two pulley mounting components are connected, the pad is also used to connect the pulley mounting component and the adjacent pulley mounting component.

[0032] According to the wind turbine blade replacement device provided by this utility model, the movable component further includes:

[0033] A limiting plate is provided on the clamp component;

[0034] The first support rod is rotatably mounted on the limiting plate;

[0035] The second support rod is threadedly connected to the first support rod, and the end of the second support rod away from the first support rod is used to connect to the end face of the blade.

[0036] The wind turbine blade replacement device provided by this utility model further includes a third support rod and an arc-shaped positioning plate. The third support rod is connected to the arc-shaped positioning plate. The side of the third support rod away from the arc-shaped positioning plate is used to connect to the pitch bearing. The side of the arc-shaped positioning plate away from the third support rod is used to abut against the clamping component.

[0037] The wind turbine blade replacement device provided by this utility model further includes:

[0038] The first root component is used to be disposed at the tip of the blade;

[0039] The tail-fixing rope is connected at one end to the first tail-root component and at the other end to the movable component;

[0040] The tail pull rope is connected to the first tail pull component.

[0041] The wind turbine blade replacement device provided by this utility model further includes:

[0042] The second root component is used to be disposed at the tip of the blade;

[0043] The sling is connected at one end to the second chute component and at the other end to the crane.

[0044] In the replacement device provided by this utility model, during use, the first fixed component is fixed to the pitch bearing by bolts, thus providing a stable fulcrum for the hoisting of the first wire rope. Secondly, the movable pulley in the movable component is fixed to the blade, providing a coupling basis between the first wire rope and the blade. Based on this, the first wire rope, starting from the fixed joint, passes through the movable pulley, changes direction, and couples with the drive component. This allows for the assembly of a modular, quick-release, and quick-installation temporary hoisting system. When the drive component releases the first wire rope, the increased length of the wire rope segments on both sides of the movable pulley causes the old blade to descend synchronously with the movable pulley. When the drive component retracts the wire rope, the movable pulley, under the action of the drive component and the first wire rope, drives the new blade upward. Through the coordinated action of the first fixed component, the movable component, the first wire rope, and the drive component, blade replacement can be achieved.

[0045] In addition, this double-ratio wire rope hoisting structure can effectively reduce the driving force required for the drive components. Furthermore, each operation only requires the removal and installation of a single blade to be replaced, allowing the remaining blades to remain in their original state. This targeted operation method reduces disturbance to other components of the unit and effectively shortens the construction cycle.

[0046] Compared to existing technologies, the replacement equipment provided by this utility model directly connects the first fixing component to the pitch bearing. This allows the blade load, which traditionally requires a large crane, to be transferred to the existing wind turbine structure, such as the pitch bearing, for support. This reduces the reliance on large cranes during blade disassembly and assembly, thus overcoming the limitations imposed by large cranes on blade replacement. Furthermore, the partial lifting method of the pitch bearing eliminates the need for complete impeller disassembly. This optimization not only reduces the stringent requirements of traditional lifting methods on site space and equipment tonnage but also enables replacement operations to be completed with only small equipment in mountainous or narrow terrains, effectively reducing the difficulty of blade replacement. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is an assembly diagram of the lifting device provided in this embodiment of the utility model.

[0049] Figure 2 This is a schematic diagram of the assembly of a partial structure of the lifting device provided in this embodiment of the utility model at the pitch bearing and blade root.

[0050] Figure 3 This is a schematic diagram of the assembly of a partial structure of the lifting device provided in this embodiment of the invention at the bottom of the tower.

[0051] Figure 4 This is a schematic cross-sectional view of the hoisting component provided in this embodiment of the utility model from a top-down perspective.

[0052] Figure 5 This is a partial structural diagram of the bottom of the mounting base provided in an embodiment of this utility model.

[0053] Figure 6 This is a schematic diagram of the shaft side structure of the hoist provided in an embodiment of the present invention.

[0054] Figure 7 This is a schematic diagram of the axial structure of the rope winding component provided in this embodiment of the utility model.

[0055] Figure 8 This is a cross-sectional structural diagram of the rope winding component provided in this embodiment of the utility model from a top view.

[0056] Figure 9 yes Figure 8 A magnified schematic diagram of the structure at point A in the middle.

[0057] Figure 10 This is a schematic diagram of the axonal structure of the active component provided in an embodiment of the present invention.

[0058] Figure 11 This is a schematic diagram of the assembly structure of the pulley mounting component and the movable pulley provided in this embodiment of the utility model.

[0059] Figure 12 This is a schematic diagram of the axial structure of the anti-slip support rod component provided in this embodiment of the utility model.

[0060] Figure 13 This is a schematic diagram of the working principle of the first tailing device provided in this embodiment of the utility model.

[0061] Figure 14 This is a schematic diagram of the assembly structure of the first tailing device and the second tailing device provided in the embodiment of this utility model.

[0062] Figure label:

[0063] 10: Tower; 20: Pitch bearing; 30: Blade; 100: First fixed assembly; 110: Fixed joint; 120: First fixed pulley; 130: Second fixed pulley; 200: Movable assembly; 210: Moving pulley; 220: Clamp assembly; 230: Pulley mounting assembly; 240: Pad; 250: First support rod; 260: Second support rod; 270: Limiting plate; 280: Third support rod; 290: Arc-shaped positioning plate; 300: First wire rope; 400: Drive assembly; 410: Winch assembly; 411: Mounting base; 412: First winch; 4121: Drum; 4122: Brake disc; 41 3: First motor; 414: First clamping component; 415: Second clamping component; 416: Driving component; 417: Second wire rope; 418: Second winch; 419: Second motor; 420: Hoist; 430: Rope winding component; 431: Rope winding bracket; 432: Rope winding drum; 4321: Drum body; 4322: Transmission plate; 433: Third motor; 434: Transmission shaft; 435: Spring; 436: Friction plate; 437: Locking component; 438: Base frame leveling component; 500: Tail-end fixing rope; 600: First tail-end component; 700: Tail-end pull rope; 800: Second tail-end component; 900: Guy rope. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0065] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0066] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Figure 1 This is an assembly diagram of the lifting device provided in this embodiment of the utility model.

[0069] For ease of understanding, this utility model will first provide a brief description of the blade 30, the pitch bearing 20, and their related components. (See reference...) Figure 1This article takes a three-bladed generator as an example. The pitch bearing 20 is used to connect the hub in the rotor and the blades 30 in the rotor. The hub (not shown in the figure) is provided with three mounting parts. The included angle between any two mounting parts is 120 degrees. Each mounting part corresponds to the installation of a pitch bearing 20. Multiple bolt holes are arranged around the edge of the pitch bearing 20. The bolt holes are used for bolt connection between the pitch bearing 20 and the blades 30.

[0070] It should be noted that the replacement device for wind turbine blades 30 provided in this embodiment of the invention (hereinafter referred to as the replacement device for ease of description) is not limited to three-blade generators, but can also be used for two-blade, four-blade, or five-blade generators, etc. When the replacement device is used for other types of generators, the setup of the replacement device can be referred to the example given in this article with a three-blade generator, which will not be described in detail here. It should also be noted that each replacement process of the replacement device provided in this embodiment of the invention is only for one blade 30. If other blades 30 also need to be replaced, the second round of replacement must be performed after the current blade 30 has been replaced.

[0071] Figure 2 This is a schematic diagram of the assembly of a partial structure of the lifting device provided in this embodiment of the utility model at the pitch bearing and blade root. Figure 3 This is a schematic diagram of the assembly of a partial structure of the lifting device provided in this embodiment of the invention at the bottom of the tower.

[0072] See Figures 1 to 3 This utility model embodiment provides a replacement device, which includes a lifting device. The lifting device includes a first fixed component 100, a movable component 200, a first wire rope 300, and a drive component 400. The first fixed component 100 includes a fixed joint 110, which can be an existing component such as a wedge joint, for easy detachable connection. In use, the fixed joint 110 is used to fix to the bottom of the pitch bearing 20 (with the blade 30 to be replaced located directly below the hub as a reference), that is, the side of the pitch bearing 20 facing the blade 30. Specifically, the fixed joint 110 can be fixed to the pitch bearing 20 using the connecting bolts between the pitch bearing 20 and the blade 30.

[0073] In some alternative embodiments, the fixed joint 110 can also be connected to components such as wheel hubs via additional parts, as long as a suitable fulcrum is provided for the lifting device in the engine room. Specifically, it can be adapted to the actual situation.

[0074] The movable component 200 includes a movable pulley 210. In use, the movable pulley 210 is used to fix to the root of the blade 30, and the movable pulley 210 needs to be located near the first fixed component 100 so that the first wire rope 300 can be wound around it. In use, the first end of the first wire rope 300 is fixed to the fixed joint 110, and the second end of the first wire rope 300 extends from the fixed joint 110 to the movable pulley 210, passes around the movable pulley 210, and then extends to the drive component 400 and is coupled to the drive component 400. The drive component 400 is used to drive the first wire rope 300 to move.

[0075] The working principle of the lifting device is shown below.

[0076] Disassembling the old blade 30: After the drive device is turned on, the drive device will control the first wire rope 300 to move from the drive device toward the movable pulley 210. As the first wire rope 300 moves, the first wire rope 300 on both sides of the movable pulley 210 will gradually increase in length, and the movable pulley 210 will gradually descend in the vertical direction. The blade 30 connected to it will also move toward the ground. This process is the descent process of the blade 30.

[0077] Replacing the old blade 30: After the old blade 30 is completely lowered to the ground, the movable component 200 is completely removed from the old blade 30 and installed on the new blade 30. After the drive device is turned on, the drive device will control the automatic pulley 210 of the first wire rope 300 to move toward the drive device. As the first wire rope 300 moves, the first wire ropes 300 on both sides of the movable pulley 210 will gradually shorten, and the movable pulley 210 will gradually rise in the vertical direction. The blade 30 connected to the movable pulley 210 will also move toward the pitch bearing 20 at the top of the wind turbine until it docks with the pitch bearing 20. This process is the rising process of the blade 30.

[0078] See Figures 1 to 3It is understood that in the replacement device provided in this embodiment of the present invention, during use, the first fixed component 100 is fixed to the pitch bearing 20 by bolts, so that the pitch bearing 20 can be used to form a stable fulcrum for the hoisting of the first wire rope 300. Secondly, the movable pulley 210 in the movable component 200 is fixed to the blade 30, so that a coupling foundation can be provided between the first wire rope 300 and the blade 30. Based on this, the first wire rope 300 starts from the fixed joint 110, passes through the movable pulley 210, and couples with the drive assembly 400 after changing direction. In this way, a quick-release and quick-installation temporary hoisting system can be formed with modular components. When the drive assembly 400 releases the first wire rope 300, the length of the wire rope segments on both sides of the movable pulley 210 increases, causing the old blade 30 to descend synchronously with the movable pulley 210. When the drive assembly 400 retracts the wire rope, the movable pulley 210 drives the new blade 30 to rise under the action of the drive assembly 400 and the first wire rope 300. Through the coordinated action of the first fixed assembly 100, the movable assembly 200, the first wire rope 300, and the drive assembly 400, the replacement of the blade 30 can be realized.

[0079] In addition, this double-ratio wire rope hoisting structure can effectively reduce the driving force required for the drive assembly 400. Furthermore, each operation only requires the disassembly and assembly of a single blade 30 to be replaced, allowing the remaining blades 30 to remain in their original state. This targeted operation method reduces disturbance to other components of the unit and effectively shortens the construction cycle.

[0080] Compared to existing technologies, the replacement equipment provided in this embodiment of the utility model directly connects the first fixing component 100 to the pitch bearing 20. This allows the load on the blade 30, which traditionally requires a large crane, to be transferred to the original structure of the wind turbine, such as the pitch bearing 20. This reduces the dependence on large cranes during the blade 30 disassembly and assembly process, thus solving the limitations imposed by large cranes on blade 30 replacement. In addition, the partial hoisting method of the pitch bearing 20 eliminates the need for complete disassembly of the impeller. This optimization of the replacement method not only reduces the stringent requirements of traditional hoisting on site space and equipment tonnage, but also allows the replacement operation to be completed with only small equipment in mountainous or narrow terrain, effectively reducing the difficulty of blade 30 replacement.

[0081] See Figures 1 to 3As shown, in an optional embodiment of this utility model, when setting up the lifting device, a lifting device can be set on each side of the blade 30. The line connecting the positions of the movable pulleys 210 on the blade 30 in these two sets of lifting devices needs to pass through the center of the blade 30. This can avoid the overturning problem caused by the shift of the center of gravity. As mentioned above, the number of lifting devices can be adaptively set according to factors such as the weight and stability of the blade 30 to be replaced, for example, three or four lifting devices. It can be understood that the symmetrically arranged lifting devices on both sides in this embodiment can lift or lower the blade 30 from both sides of the blade 30 respectively. This two-lifting-point method simplifies the required components and also ensures the stability of the blade 30.

[0082] Continue reading Figure 2 and Figure 3 In optional embodiments of this utility model, the position of the drive assembly 400 during use can be selected in several ways. Specifically, the drive assembly 400 can be set on the pitch bearing 20, on the blade 30, or on the ground. It should be noted that when the drive assembly 400 is set on the blade 30 or on the ground, since the second end of the first wire rope 300 needs to pass under the movable pulley 210 and change its direction of movement once at the movable pulley 210, the first fixed assembly 100 also needs to be equipped with a first fixed pulley 120 to change the direction of the first wire rope 300 a second time. The first fixed pulley 120 and the aforementioned fixed joint 110 are spaced apart, and the position of the movable pulley 210 in the vertical direction needs to be located between the first fixed pulley 120 and the fixed joint 110.

[0083] In use, the first end of the first wire rope 300 is fixed to the fixed joint 110. The second end of the first wire rope 300 needs to be wound around the movable pulley 210 and the first fixed pulley 120 in sequence. After passing over the first fixed pulley 120, the first wire rope 300 extends to the drive assembly 400 and couples with it. If the drive assembly 400 is located on the ground, the second end of the first wire rope 300 needs to be pulled downwards to the ground. Figure 2 and Figure 3 As shown.

[0084] It is understood that, based on the foregoing embodiments, the location of the drive component 400 in this embodiment can be adaptively selected according to actual conditions. This allows the replacement equipment to have multiple flexible configuration options during actual use, providing targeted solutions for different actual environments and needs, thereby effectively improving construction efficiency and reducing the difficulty of actual construction. Furthermore, when high-altitude operations are inconvenient, the first fixed pulley 120 is set to change the direction of the first wire rope 300 a second time, providing a structural foundation for the drive component 400 to be installed on the ground. This facilitates the operator to implement lifting control from the ground, reducing the installation and control difficulty of the replacement device.

[0085] Figure 4 This is a schematic cross-sectional view of the hoisting component provided in this embodiment of the utility model from a top-down perspective.

[0086] See Figure 3 and Figure 4 In an optional embodiment of the present invention, the drive assembly 400 includes a winch component 410. As described in the foregoing embodiments, the winch component 410 can be disposed on any one of the blade 30, the pitch bearing 20, and the ground. In this embodiment of the present invention, the winch component 410 is disposed on the ground as an example.

[0087] The hoisting component 410 includes a mounting base 411, a first hoist 412, and a first motor 413. The mounting base 411 is used to be set on the ground. Specifically, it can be fixed to the root of the tower 10 by means of bolts on the flange at the root of the tower 10. It should be noted that the ground here should be interpreted in a broad sense. For example, the mounting base 411 can also be set on a transport vehicle or support platform on the ground.

[0088] The first winch 412 is rotatably mounted on the mounting base 411. The second end of the first wire rope 300 extends downward to the first winch 412 after leaving the first fixed pulley 120 and is connected to the first winch 412. During rotation, the first winch 412 will drive the first wire rope 300 to wind up or release. The first motor 413 is connected to the first winch 412 and serves as a power source to drive the first winch 412 to rotate. The first motor 413 can be mounted on the mounting base 411 or separately mounted on the outside of the mounting base 411, depending on the actual situation.

[0089] It is understood that in the replacement device provided in this utility model embodiment, the mounting base 411 serves as the bearing foundation and is rigidly connected to the first winch 412 using fasteners such as bolts. This not only ensures the structural stability of the winch mechanism during dynamic traction, but also allows for quick installation and maintenance of the winch component 410 through its detachable design. Furthermore, the connection method between the first motor 413 and the mounting base 411 retains the flexibility of the installation position (base or outside), ensuring power transmission efficiency while avoiding layout conflicts caused by space limitations, which is beneficial to improving the flexibility of the winch component 410.

[0090] See Figure 3 As described in the preceding embodiments, when two sets of components such as the first fixed component 100 and the movable pulley 210 are provided, two sets of winch components 410 also need to be provided accordingly, spaced apart from each other. The distance between the two sets of winch components 410 needs to ensure that after the blade 30 falls to the ground, the root of the blade 30 can be placed between the two winch components 410, and there should be no positional interference between the three, so as to ensure sufficient working space. As mentioned above, the number and position of the winch components 410 can be adapted to the actual situation. The cases of three or four winch components 410 can refer to the implementation method of two winch components 410, which will not be described in detail here.

[0091] In an optional embodiment of this utility model, a force sensor can be installed at the connection between the first winch 412 and the mounting base 411. During use, the force sensor can detect the stress between the first winch 412 and the mounting base 411, and the weight of the blade 30 can be detected through simple calculation. Furthermore, a detection threshold of the force sensor can be set and associated with the rated load of the winch component 410. At the same time, an alerting component connected to the force sensor, such as an alarm light or a buzzer, can be set. When the actual detected value exceeds the threshold, the alerting component can be used to raise nearby workers to detect that the winch component 410 is overloaded. This can prevent overload operation and thus ensure safety during the hoisting process.

[0092] Continue reading Figure 4 In an optional embodiment of this utility model, the winch component 410 further includes a safety braking component, which includes a first clamping member 414, a second clamping member 415, and a driving member 416. Correspondingly, the first winch 412 includes a drum 4121, a drive shaft 434, and a brake disc 4122. The drive shaft 434 is rotatably mounted on the mounting base 411 and connected to the first motor 413. The drum 4121 is sleeved on the drive shaft 434, and the brake disc 4122 is located at the end of the drum 4121, and can be provided on one side or both sides.

[0093] Taking a single-sided configuration as an example, the first clamping member 414 and the second clamping member 415 are arranged opposite each other on both sides of the brake disc 4122. The driving member 416 is connected to at least one of the first clamping member 414 and the second clamping member 415. The driving member 416 is used to control the distance between the first clamping member 414 and the second clamping member 415. For example, components such as pump stations and telescopic cylinders are set as driving members 416. During use, if the deceleration structure inside the first motor 413 or the first winch 412 fails, and the drum 4121 rotates freely under the weight of the blade 30, the driving member 416 can be activated immediately to control the first clamping member 414 and the second clamping member 415 to clamp the brake disc 4122, so as to prevent the first wire rope 300 from moving freely under the gravity of the blade 30, thereby preventing the blade 30 from falling and being damaged, or even threatening the personal safety of the surrounding operators. This can effectively improve the safety of the winch component 410.

[0094] See Figure 2 and Figure 4 In an optional embodiment of this utility model, the first fixing component 100 further includes a second fixed pulley 130, which is disposed on the pitch bearing 20 and located near the first fixed pulley 120 and the fixed joint 110; the winch component 410 further includes an auxiliary lifting component, which includes a second wire rope 417, a second winch 418 and a second motor 419. The second winch 418 is rotatably disposed on the mounting base 411, and its specific arrangement is similar to that of the aforementioned first winch 412; the second motor 419 is connected to the second winch 418, and its arrangement is also similar to that of the aforementioned first motor 413.

[0095] One end of the second wire rope 417 is fixedly connected to the second winch 418, and the second end of the second wire rope 417 extends upward to the second fixed pulley 130, passes over the second fixed pulley 130, and hangs down naturally. The second winch 418 is used to control the second end of the second wire rope 417 to move vertically under the drive of the second motor 419. In an optional embodiment of this utility model, multiple second fixed pulleys 130 can be provided to guide the direction and position of the second wire rope 417. The second winch 418 and the second motor 419 can also be separately installed outside the mounting base 411. Specifically, the design can be adapted according to the actual situation.

[0096] Understandably, due to the heavy weight of the blade 30, in order to meet the load-bearing requirements, the first wire rope 300, fixed joint 110, first fixed pulley 120, and movable component 200 are also heavy, making manual handling time-consuming and labor-intensive. In this embodiment of the utility model, by setting an auxiliary lifting component, the first wire rope 300, fixed joint 110, first fixed pulley 120, and movable component 200 can be fixed to the second end of the second wire rope 417 during use. By controlling the second winch 418 to hoist these components to the pitch bearing 20 and blade 30, the installation efficiency of the replacement equipment can be effectively improved, thereby effectively shortening the construction period.

[0097] Figure 5 This is a partial structural diagram of the bottom of the mounting base provided in an embodiment of this utility model.

[0098] See Figure 4 and Figure 5 In an optional embodiment of this utility model, a base leveling component 438 is provided on each side of the base of the mounting frame 411. The base leveling component 438 consists of a support plate, an adjusting screw, a lock nut, and a support block. The support plate is connected to the mounting frame 411, and the adjusting screw is threadedly connected to the support plate. The support block is located at the bottom of the adjusting screw, and the two are rotatably engaged. The lock nut is fitted onto the base of the adjusting screw. The height can be adjusted up and down by turning the adjusting screw. When the working site is recessed relative to the flange surface of the tower 10, the leveling component allows the mounting frame 411 to still be installed horizontally, thereby effectively improving the adaptability of the hoisting component 410 to different environments.

[0099] Continue reading Figure 5 In an optional embodiment of this utility model, the base leveling component 438 further includes a rubber pad. The rubber pad is located at the bottom of the support block. The function of the rubber pad is to increase the contact area between the support block and the ground, so that it can adapt to soft ground. Specifically, it can be adapted according to the actual situation.

[0100] Figure 6 This is a schematic diagram of the shaft side structure of the hoist provided in an embodiment of the present utility model; Figure 7 This is a schematic diagram of the axial structure of the rope winding component provided in this embodiment of the utility model.

[0101] See Figure 6 and Figure 7In an optional embodiment of this utility model, unlike the aforementioned embodiments, the drive assembly 400 includes a hoist 420, a mounting frame, a guide rope wheel, and a rope winding component 430. The hoist 420, the mounting frame, and the guide rope wheel are connected as a whole by fasteners. The hoist 420 includes an upper rope outlet and a lower rope outlet, which are arranged opposite each other at the upper and lower ends of the hoist 420. The guide rope wheel is located directly below the lower rope outlet. Similar to the previous embodiment, the mounting frame can be installed on the pitch bearing 20, the blade 30, or the ground.

[0102] In use, after the automatic pulley 210 at the second end of the first wire rope 300 leaves, it will enter the hoist 420 from the top rope outlet (when the hoist 420 is installed on the pitch bearing 20); if the hoist 420 is installed on the ground or on the blade 30, the first fixed pulley 120 as described above is also required to reverse the direction of the first wire rope 300, as detailed above.

[0103] Inside the hoist 420, the second end of the first wire rope 300 is coiled around the grooved inner toothed ring and pressed by the rope pressing mechanism, and then leaves the hoist 420 from the lower rope outlet. After leaving the hoist 420, the first wire rope 300 passes through the guide rope wheel and continues to extend to the far end. The brake motor on the hoist 420 drives the grooved inner toothed ring to rotate after deceleration through the worm gear and gear pair, thereby realizing the movement of the first wire rope 300.

[0104] After the first wire rope 300 leaves the hoist 420, it needs to retain a sufficient length. This section of the first wire rope 300 is in a free state and is prone to accumulation or knotting. In this embodiment of the present invention, the rope winding component 430 is provided on the moving path of the first wire rope 300 leaving the hoist 420. After the second end of the first wire rope 300 leaves, it is fixed to the rope winding component 430. The rope winding component 430 is used to wind up the first wire rope 300.

[0105] The installation position of the rope take-up component 430 can be adapted to the position of the hoist 420. For example, when the hoist 420 is installed on the pitch bearing 20, the rope take-up component 430 can be installed on the pitch bearing 20, the blade 30, or the ground; when the hoist 420 is installed on the blade 30, the rope take-up component 430 can be installed on the blade 30 or the ground; when the hoist 420 is installed on the ground, the rope take-up component 430 can be installed on the ground.

[0106] It is understood that in the replacement device provided in this embodiment of the present invention, the hoist 420 serves as the power source. During use, after the first wire rope 300 enters the upper rope outlet of the hoist 420 via the automatic pulley 210, it is orderly wound around the grooved internal gear ring and pressed by the rope pressing mechanism. Combined with the torque amplification effect of the worm gear reduction mechanism, the moving speed and direction of the first wire rope 300 can be precisely adjusted. Secondly, the layout of the guide wheel located directly below the lower rope outlet can constrain the rope outlet angle of the first wire rope 300, thereby avoiding frictional wear between the first rope and the edge of the equipment. In addition, the rope winding component 430 can wind up the free section of the first wire rope 300 extending to the far end in real time, thereby solving problems such as tangling, knotting, or mud accumulation caused by the rope hanging freely. At the same time, maintaining the rope tension through the rope winding component 430 can also ensure the continuity of the lifting process.

[0107] It is also understandable that when the hoist 420 or the winch component 410 is mounted on the blade 30, the connection point here can add a lifting point on the blade 30. That is, in this case, a single hoisting device can provide two coupling points between the blade 30 and the first wire rope 300. This design can effectively distribute the weight of the blade 30, thereby improving the stability and safety during the hoisting process.

[0108] See Figure 6 In an optional embodiment of this utility model, the rope winding component 430 includes a rope winding bracket 431, a rope winding drum 432, a third motor 433, and a drive shaft 434. The second end of the first wire rope 300 is fixed to the rope winding drum 432, the rope winding drum 432 is sleeved on the drive shaft 434, the drive shaft 434 is rotatably mounted on the rope winding bracket 431, the third motor 433 is mounted on one side of the rope winding bracket 431, and the output shaft of the third motor 433 is connected to the drive shaft 434. The third motor 433 is used to drive the drive shaft 434 and the rope winding drum 432 to rotate.

[0109] Understandably, when the hoist 420 moves the first wire rope 300, the third motor 433 will drive the transmission shaft 434 and the take-up drum 432 to rotate in the corresponding direction. The rotation of the take-up drum 432 will release or retract the first wire rope 300, thereby meeting the requirements of the length change of the first wire rope 300 on both sides of the movable pulley 210. In this process, the length change of the first wire rope 300 on both sides during the lifting and lowering of the movable pulley 210 can be offset in real time by the release or retraction action of the take-up drum 432, thereby maintaining a constant tension of the first wire rope 300 between the hoist 420 and the take-up drum 432.

[0110] Figure 8 This is a schematic cross-sectional view of the rope winding component provided in this embodiment of the utility model from a top perspective; Figure 9 yes Figure 8 A magnified schematic diagram of the structure at point A in the middle.

[0111] See Figure 7 and Figure 8 In an optional embodiment of this utility model, the rope winding drum 432 includes a drum body 4321 and a transmission plate 4322, the transmission plate 4322 being located inside the drum body 4321 and the two being fixedly connected; or the transmission plate 4322 is located at the end of the drum body 4321, serving as an end plate of the drum body 4321; in both cases, the transmission plate 4322 is sleeved on the transmission shaft 434 and rotatably engaged with the transmission shaft 434, and the second end of the first wire rope 300 is fixed to the drum body 4321; it should be noted that, when the transmission plate 4322 is located inside the drum body 4321, an end plate can also be separately provided at the end of the drum body 4321, such as Figure 8 As shown.

[0112] Correspondingly, the rope winding component 430 also includes a spring 435, a friction plate 436, and a locking element 437. The friction plate 436, spring 435, and locking element 437 are sequentially sleeved on the drive shaft 434, with the side of the friction plate 436 away from the spring 435 abutting against and fitting against the drive plate 4322. The locking element 437 is threadedly engaged with the drive shaft 434. The friction plate 436 is used to drive the drive plate 4322 to rotate under the drive of the drive shaft 434. The spring 435 can be a helical spring 435 or a disc spring, and the locking element 437 can be a nut, or other existing components.

[0113] In use, the elastic potential energy stored in the spring 435 can be changed by rotating the locking member 437. The cooperation between the locking member 437 and the spring 435 will provide a preload force, so that the supporting friction plate 436 is tightly attached to the transmission plate 4322. When the transmission shaft 434 rotates, the transmission shaft 434 will drive the friction plate 436 to rotate synchronously. At this time, there is static friction between the friction plate 436 and the transmission plate 4322. Therefore, the torque of the transmission shaft 434 can be transmitted to the transmission plate 4322 through the friction plate 436.

[0114] Understandably, as the number of layers of the first wire rope 300 wound on the take-up drum 432 increases or decreases, the linear speed of the take-up drum 432 will also increase or decrease accordingly. However, the speed of the hoist 420 is constant. Therefore, during the take-up or release of the rope, there will inevitably be a mismatch between the speed of the motor and the speed of the hoist 420. The accumulation of this phenomenon will cause the first wire rope 300 to become tighter and tighter, or looser and looser, or it may be loose first and then tight. When the first wire rope 300 is loose, the first wire rope 300 on the drum 4321 will inevitably become more and more tangled. When the first wire rope 300 becomes tighter and tighter, it will eventually exceed the load of the motor and damage the motor.

[0115] In an optional embodiment of this utility model, the transmission shaft 434 transmits torque through static friction contact between the friction plate 436 and the transmission plate 4322. This allows the transmission plate 4322 to rotate synchronously with the transmission shaft 434 under normal operating conditions. However, when the load on the winding drum 432 changes abruptly, relative sliding can occur between the friction plate 436 and the transmission plate 4322, thereby preventing overload damage to the transmission system. Furthermore, the threaded engagement between the spring 435 and the locking member 437 generates an adjustable preload. By adjusting the compression of the spring 435 by turning the locking member 437, a constant friction torque can be set, which means that the winding drum 432 has the characteristic of adjustable and constant output torque. When the number of layers of the first wire rope 300 increases or decreases, the locking member 437 is adjusted accordingly. This solves the problem caused by the speed mismatch between the motor and the hoist 420, thereby ensuring that the first wire rope 300 is smooth and does not become tangled during the winding process.

[0116] In some alternative embodiments, when the number of transmission plates 4322 is greater than or equal to two, the number of friction plates 436 can be increased accordingly. The friction plates 436 are then disposed on one side of the increased transmission plates 4322 and kept in contact. Figure 8 The diagram shows the configuration with two transmission plates 4322. Specifically, along the direction of the transmission shaft 434, a locking element 437, a spring 435, a friction plate 436, and another transmission plate 4322 are sequentially arranged. During pre-tightening, the locking element 437 compresses the spring 435, which in turn compresses the first friction plate 436 and the first transmission plate 4322. The locking force is transmitted through the cylinder 4321 to the second transmission plate 4322, which in turn compresses the second friction plate 436. It can be understood that the stacked arrangement of multiple sets of transmission plates 4322 and friction plates 436 can expand the adjustable range of torque transmission capacity, thereby allowing the load requirements under different working conditions to be matched by increasing or decreasing the number of friction plates 436.

[0117] See Figure 8 and Figure 9 In an optional embodiment of this utility model, the rope winding component 430 further includes a pressure plate and a copper sleeve. The pressure plate is disposed between the spring 435 and the locking member 437, and between the spring 435 and the friction plate 436. The pressure plate can increase the contact area between the locking member 437 and the spring 435, and between the spring 435 and the friction plate 436, thereby making the stress transmission between any two components more uniform. A bushing is welded in the middle of the transmission plate 4322, and the copper sleeve is disposed between the bushing and the transmission shaft 434. When relative rotation occurs between the transmission plate 4322 and the transmission shaft 434, the specific relative rotation will occur between the copper sleeve and the bushing, which can prevent wear on the transmission shaft 434 and the transmission plate 4322.

[0118] Figure 10 This is a schematic diagram of the axonometric structure of the active component provided in this embodiment of the utility model; Figure 11 This is a schematic diagram of the assembly structure of the pulley mounting component and the movable pulley provided in this embodiment of the utility model.

[0119] See Figure 10 and Figure 11 In an optional embodiment of this utility model, the movable component 200 includes several clamping components 220, several pulley mounting components 230, and several pads 240. The clamping components 220 and the pulley mounting components 230 are connected along a preset annular path. This annular structure is used to form a clamping structure, which is used to be fitted onto the root of the blade 30. The pulley mounting components 230 are used to set the movable pulley 210, and the pads 240 are used to connect the clamping components 220 and the pulley mounting components 230.

[0120] Specifically, such as Figure 9 As shown in the embodiment of this utility model, there are two pulley mounting components 230. The two pulley mounting components 230 are arranged opposite each other on a preset annular path. Multiple clamping components 220 are evenly arranged on the arc segment between the two pulley mounting components 230. The pad block 240 is arranged between the pulley mounting component 230 and the clamping component 220, and is also arranged between any two adjacent clamping components 220. That is to say, in this example, the pad block 240 is also used to connect any two adjacent clamping components 220.

[0121] In optional embodiments of this utility model, the number and arrangement of the clamping component 220 and the pulley mounting component 230, as well as the specific form of the clamping component 220, can be adaptively selected. For example, the clamping component 220 between the two pulley mounting components 230 in the aforementioned example can also be an integral structure; for another example, one, three, or five pulley mounting components 230 can also be provided; for another example, when multiple pulley mounting components 230 are provided, pulley mounting components 230 connected to each other can also be provided. In this case, the first fixing component 100 and other components can be provided accordingly. Furthermore, in this case, the pad block 240 is also used to connect any two adjacent pulley mounting components 230.

[0122] Furthermore, in an optional embodiment of this utility model, the thickness of the pad 240 can be adaptively adjusted, and the number of pads 240 between the clamping component 220 and the pulley mounting component 230 can also be adaptively increased. Through these two methods, the size of the aforementioned clamping structure can be adaptively adjusted at any time to meet the diameter requirements of the blades 30 of different machine models. In an optional embodiment of this utility model, the size of the clamping structure can also be changed at any time by adjusting the number of clamping components 220; specifically, it can be adaptively set according to actual conditions.

[0123] The fixing principle of the clamp structure is as follows: by tightening the fasteners between clamp components 220, between clamp components 220 and pulley mounting components 230, or between pulley mounting components 230 and pulley mounting components 230, the fasteners reach a predetermined preload value. The inner ring of the clamp structure will contract and squeeze the root of the blade 30, giving the root of the blade 30 a ring-shaped positive pressure. This will cause friction between the clamp structure and the root of the blade 30, so that the clamp structure and the blade 30 form a temporary whole.

[0124] It is understood that in the replacement device provided in this utility model embodiment, by constructing the movable component 200 as a modular ring structure including the clamp component 220, the pulley mounting component 230 and the pad 240, the clamp structure and the root of the blade 30 can be adjusted by friction fixation based on the fastener pre-tightening force, thereby providing a non-intrusive and size-adaptable coupling foundation for the installation of the movable pulley 210.

[0125] Specifically, the connection method of the clamp component 220 and the pulley mounting component 230 along a preset annular path, combined with the adjustability of the thickness and number of the pads 240 and the variability of the number of components, allows the inner ring size of the annular structure to be continuously or discretely adjusted by adding or removing pads 240 or adjusting the number of components, thereby adapting to blades 30 of different diameters. At the same time, by tightening the fasteners between adjacent components to a predetermined preload value, the annular positive pressure generated by the contraction of the inner ring of the annular structure will be converted into a uniform frictional force between the blade 30 and the root. In this way, damage to the blade 30 body caused by traditional welding or bolt piercing can be avoided, and the mechanical stability required for temporary fixation can be ensured.

[0126] Furthermore, the relative positions of the pulley mounting component 230 and the clamping component 220 can be adaptively arranged based on the layout requirements of the movable pulley 210. For example, two pulley mounting components 230 can be symmetrically arranged to balance the force, or the rigidity distribution of the ring structure can be optimized by increasing or decreasing the number of clamping components 220. This design, which takes into account both functional expansion and structural optimization, can provide the blade 30 coupling foundation with customizability and good reliability without changing the basic connection logic.

[0127] Figure 12 This is a schematic diagram of the axial structure of the anti-slip support rod component provided in this embodiment of the utility model.

[0128] See Figure 2 and Figure 12In an optional embodiment of this utility model, the movable component 200 further includes an anti-slip support rod component. The anti-slip support rod component includes a first support rod 250, a second support rod 260, and a limiting plate 270. The limiting plate 270 is used to connect with the clamp component 220. The first support rod 250 is rotatably connected to the limiting plate 270. The end of the first support rod 250 away from the limiting plate 270 has a rod thread structure, and the second support rod 260 has a corresponding pipe thread structure. The two are threaded together. The end of the second support rod 260 away from the first support rod 250 is provided with a connecting plate, which is used to connect to the root of the blade 30.

[0129] It should be noted that a wrench working structure needs to be reserved near the threaded section of the first support rod 250 so that the operator can adjust the first support rod 250 by wrench to change the overall length of the anti-slip support rod component.

[0130] In use, the blade 30 can be lowered to one end, and the connecting plate can be bolted to the flange interface at the root of the blade 30. Further, the first support rod 250 is turned to adjust the overall length of the first support rod 250 and the second support rod 260, so that the limiting plate 270 is pressed against the clamping component 220. Then, the limiting plate 270 and the clamping component 220 are connected as a whole by bolts, forming a temporary integrated structure between the anti-slip support rod component and the clamping structure. The number and position of the anti-slip support rod components can be adaptively set according to factors such as connection strength and stability; this embodiment of the invention does not limit this.

[0131] It is understood that in the replacement device provided in this embodiment of the present invention, the first support rod 250 and the second support rod 260 form an adjustable telescopic structure through the cooperation of the rod thread and the pipe thread. Combined with the rotatable connection between the limiting plate 270 and the clamp component 220, the operator can press and fix the limiting plate 270 to the surface of the clamp component 220 by rotating the first support rod 250. In addition, on the basis of the clamp structure and the blade 30, a connection point between the movable component 200 and the blade 30 can be added, so that a multi-point mechanical coupling structure can be formed between the movable component 200 and the root of the blade 30.

[0132] Compared to the single fixing method that relies solely on the friction of the clamp structure, the introduction of the anti-slip strut component adds mechanical locking force formed by flange bolt connection to the friction constraint generated by the original annular positive pressure. This overcomes the risk of loosening caused by vibration or load impact that is easily caused by simple friction fixing, effectively improving the anti-slip stability of the movable component 200, thereby ensuring the safety and reliability of the blade 30 during hoisting.

[0133] Continue reading Figure 2The movable component 200 also includes a third support rod 280 and an arc-shaped positioning plate 290. The third support rod 280 is fixedly connected to the arc-shaped positioning plate 290. The end of the third support rod 280 away from the arc-shaped positioning plate 290 is used to connect to the pitch bearing 20. Specifically, the third support rod 280 can be fixed by bolts on the outer ring of the bottom of the pitch bearing 20. The side of the arc-shaped positioning plate 290 away from the third support rod 280 is used to abut against the clamp component 220. It should be noted that the number of the third support rod 280 and the arc-shaped positioning plate 290 can be adapted, and this utility model does not make specific requirements in this regard.

[0134] Understandably, when installing the clamp component 220, the installation position of the clamp component 220 can be positioned by the arc-shaped positioning plate 290, which can effectively improve the installation efficiency of the clamp component 220. Secondly, the arc-shaped positioning plate 290 can also provide temporary footholds for operators, which facilitates the operation of operators and provides convenience for the installation of the clamp component 220. On the other hand, it can ensure the safety of operators.

[0135] Figure 13 This is a schematic diagram of the working principle of the first tailing device provided in this embodiment of the utility model; Figure 14 This is a schematic diagram of the assembly structure of the first tailing device and the second tailing device provided in the embodiment of this utility model.

[0136] See Figure 13 and Figure 14 In an optional embodiment of this utility model, the replacement device further includes a first tailing device, which includes a tailing fixing rope 500, a first tailing root component 600, and a tailing pull rope 700. One end of the tailing fixing rope 500 is connected to the first tailing root component 600, and the other end is connected to the clamp component 220 or the pulley mounting component 230 in the movable component 200. The first tailing root component 600 is used to be installed to the tip of the blade 30. Specifically, the first tailing root component 600 can be a ring component. One end of the first tailing pull rope 700 is connected to the first tailing root component 600, and the other end of the first tailing pull rope 700 hangs down naturally to the ground.

[0137] In use, the first guide root component 600 can be lifted to the tip of the blade 30 by the auxiliary lifting component in the aforementioned embodiment, and guided to fit into the predetermined position of the tip of the blade 30. Then, the first guide root component 600 and the movable component 200 are fixedly connected by the tail fixing rope 500 so that the two form a temporary whole. The size of the first guide root component 600 can be adapted to the model of the blade 30 so that after it is installed in place, it can form an abutment structure with the conical surface of the tip of the blade 30 and be temporarily fixed by the tail fixing rope 500.

[0138] It is understandable that, since the blade 30 is installed at an angle α to the vertical plane, the root flange surface of the blade 30 is not horizontal after installation, but also at an angle to the horizontal plane. Based on this, the bolts on the blade 30 also form a certain angle with the vertical plane. This means that the old blade 30 needs to maintain its original tilted posture during the initial disassembly and lowering stage, and the same applies to the final docking stage of the new blade 30. In the replacement device provided by this utility model embodiment, by setting a tailing fixing rope 500, a first tailing root component 600, and a tailing pull rope 700, the posture of the blade 30 can be changed by pulling the tailing pull rope 700 during the initial lowering stage of the old blade 30 and the rising and final docking stage of the new blade 30, so that the blade 30 forms a certain angle with the vertical plane. This reduces the risk of positional interference between the bolt rod on the blade 30 and the pitch bearing 20, improves the safety and stability during the hoisting process, and also facilitates the docking of the new blade 30 with the pitch bearing 20.

[0139] Continue reading Figure 13 In an optional embodiment of this utility model, the replacement device also includes a wind rope 900, which is fixed to the tail of the blade 30. The specific setting is similar to that of the tail pull rope 700. The wind rope 900 is used to ensure the stability of the blade 30 during the lifting and lowering process. When the tail pull rope 700 is not used to adjust the tilt of the blade 30, the tail pull rope 700 can also be used as the wind rope 900. Specifically, it can be adapted according to the actual situation.

[0140] Continue reading Figure 14 In an optional embodiment of this utility model, the replacement device further includes a second tailing device, which includes a second tailing component 800 and a sling. One end of the sling is connected to the second tailing component 800, and the other end of the sling is used to connect to a crane. The second tailing component 800 is used to be set at the tip of the blade 30. The specific structure of the second tailing component 800 is similar to that of the first tailing component 600. The specific setting position of the second tailing component 800 is close to that of the first tailing component 600, and can be adapted according to the actual situation.

[0141] Understandably, when the blade 30 is lowered vertically and close to the ground, it can be gradually leveled by using a crane to lift the slings and in conjunction with the drive assembly 400. When the blade 30 needs to be lifted, conversely, it can be lifted horizontally to a certain height by using a crane to lift the slings and in conjunction with the drive assembly 400, and then gradually adjusted to a vertical position. This arrangement can prevent the tip of the blade 30 from rubbing against the ground during the hoisting process, thus ensuring the integrity of the blade 30.

[0142] In an optional embodiment of this utility model, rubber pads or rollers may be provided on the inner side of the aforementioned first guide root component 600 and second guide root component 800. This can prevent the surface of the blade 30 from being scratched when the first guide root component 600 and second guide root component 800 are fitted onto the blade 30, thus ensuring the integrity of the blade 30.

[0143] The following shows an optional method for replacing the blade 30 corresponding to the replacement device provided by this utility model.

[0144] Step 1: Install the ground components (such as two winch components 410) of the blade 30 replacement device onto the root flange of the tower 10.

[0145] Step 2: Use a rotary locomotive to rotate the blade 30 to be removed to the top.

[0146] Step 3: Install the first fixing component 100, the third support rod 280 and the arc-shaped positioning plate 290 at the predetermined position on the outer ring of the pitch bearing 20.

[0147] Step 4: Install the movable component 200 at the predetermined position at the root of the blade 30.

[0148] Step 5: Use a rotating wheel to rotate the impeller again, and rotate the blade 30 to be removed to the bottom.

[0149] Step 6: Using the auxiliary lifting component, install the first guide root component 600 to the predetermined position at the tip of the blade 30, and connect it to the movable component 200 with the tail fixing rope 500.

[0150] Step 7: Use the auxiliary lifting components to lift the first steel wire rope 300 on the ground to the fixed joint 110 and fix it.

[0151] Step 8: Replace at least 8 longer double-ended bolt assemblies symmetrically and evenly with the connecting nuts of blade 30 and pitch bearing 20 (e.g., Figure 2 As shown, the installed double-ended bolts need to be a certain distance higher than the upper end face of the pitch bearing 20. The purpose of replacing several longer double-ended bolt assemblies is to ensure that the blades 30 will not slip off or fall off during the lowering of a certain distance before installing the movable assembly 200.

[0152] Step 9: With the cooperation of the drive assembly 400 and the first tailing device, the blade 30 is lowered a certain distance (the purpose of this distance is to ensure the smooth installation of the second support rod 260).

[0153] Step 10: Install the anti-slip strut assembly.

[0154] Step 11: Remove the double-headed bolt assembly. After all 30 bolt rods on the blade have been removed from the pitch bearing 20, loosen the tail pull rope 700.

[0155] Step 12: Continue lowering blade 30 until blade 30 is close to the ground.

[0156] Step 13: The crane lifts the second root component 800 with a sling and fits it into the predetermined position at the blade tip. Under the action of the crane and the second root component 800, the blade 30 is placed horizontally on the ground.

[0157] To install the new blade 30, simply follow the reverse order described above.

[0158] It should be noted that in step three, the first fixed pulley 120 and the fixed joint 110 in the first fixed component 100 need to be distributed on both sides of the pulley mounting component 230 in the movable component 200, and the positions of the two components relative to the pulley mounting component 230 in the circumferential direction of the pitch bearing 20 need to take into account three factors.

[0159] Factor 1: During the movement of the first wire rope 300, the tilt angle of the first wire rope 300 is within the allowable tilt angle range of the first winch 412.

[0160] Factor 2: When the blade 30 and the pitch bearing 20 are not yet separated, the angle between the first wire ropes 300 on both sides of the moving pulley 210 is the largest. This state will increase the force on the first wire rope 300. Therefore, the arrangement of the first fixed pulley 120 and the fixed joint 110 should minimize the angle at this point.

[0161] Factor 3: The installation positions of the first fixed pulley 120 and the fixed joint 110 also affect the magnitude of the force and the angle of the pull rope 700 on the first sliding root component 600. Therefore, the arrangement of the positions of the first fixed pulley 120 and the fixed joint 110 should minimize the magnitude of the force and the angle of the pull rope 700.

[0162] It should be noted that the technical solutions in the various embodiments of this utility model can be combined with each other, but the basis for such combination is that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist, that is, it is not within the protection scope of this utility model.

[0163] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for replacing wind turbine blades, characterized in that, include: A first fixed component (100) is used to be mounted on the pitch bearing (20); A movable component (200) is provided on the blade (30), the movable component (200) is provided with a movable pulley (210), the movable pulley (210) is located below the first fixed component (100); A first wire rope (300) is fixed at its first end to the first fixing component (100). The drive assembly (400) has the second end of the first wire rope (300) wound around the movable pulley (210) and coupled to the drive assembly (400), which is used to control the movement of the first wire rope (300).

2. The wind turbine blade replacement device according to claim 1, characterized in that, The drive assembly (400) is used to be disposed on the blade (30), the pitch bearing (20), or the ground; When the drive assembly (400) is located on the blade (30) or the ground, the first fixing assembly (100) includes a fixed joint (110) and a first fixed pulley (120) spaced apart, the movable pulley (210) is located between the fixed joint (110) and the first fixed pulley (120), the first end of the first wire rope (300) is fixed to the fixed joint (110), and the second end of the first wire rope (300) is sequentially wound around the movable pulley (210) and the first fixed pulley (120) and coupled to the drive assembly (400).

3. The wind turbine blade replacement device according to claim 2, characterized in that, The drive assembly (400) includes a hoisting component (410), the hoisting component (410) comprising: Mounting base (411) is used for installation on the ground; The first winch (412) is rotatably mounted on the mounting base (411), and the second end of the first wire rope (300) is fixed to the first winch (412). The first motor (413) is connected to the first winch (412) and is used to drive the first winch (412) to rotate.

4. The wind turbine blade replacement device according to claim 3, characterized in that, The first hoist (412) includes: The drum (4121) is rotatably mounted on the mounting base (411). A brake disc (4122) is located at one end of the drum (4121); The hoisting component (410) further includes: The first clamping member (414) is provided on one side of the brake disc (4122); The second clamping member (415) is provided on the other side of the brake disc (4122); A drive member (416) is connected to the first clamping member (414) and / or the second clamping member (415) for controlling the spacing between the first clamping member (414) and the second clamping member (415).

5. The wind turbine blade replacement device according to claim 3, characterized in that, The first fixing component (100) also includes a second fixed pulley (130); The hoisting component (410) further includes: The second roll (418) is rotatably mounted on the mounting base (411). The second motor (419) is connected to the second winch (418); The second wire rope (417) has its first end connected to the second winch (418) and its second end wound around the second fixed pulley (130). The second winch (418) is used to control the second end of the second wire rope (417) to move vertically under the drive of the second motor (419).

6. The wind turbine blade replacement device according to claim 2, characterized in that, The drive component (400) includes: A hoist (420) is used to fix the hoist to the pitch bearing (20), the blade (30), or the ground; the second end of the first wire rope (300) is passed through the hoist (420), and the hoist (420) is used to control the movement of the first wire rope (300); A rope winding component (430) is disposed on the path of the first wire rope (300) on the side of the lower rope outlet of the hoist (420). The rope winding component (430) is used to wind up and unwind the first wire rope (300).

7. The wind turbine blade replacement device according to any one of claims 1 to 6, characterized in that, The active component (200) also includes several clamping components (220), several pulley mounting components (230) and several pads (240). The clamping components (220) and the pulley mounting components (230) are connected along a pre-defined annular path to form a clamping structure. The clamping structure is used to be fitted onto the root of the blade (30). The movable pulley (210) is provided on the pulley mounting component (230), and the pad (240) is used to connect the clamp component (220) and the pulley mounting component (230); when two clamp components (220) are connected, the pad (240) is also used to connect the clamp component (220) and the adjacent clamp component (220); when two pulley mounting components (230) are connected, the pad (240) is also used to connect the pulley mounting component (230) and the adjacent pulley mounting component (230).

8. The wind turbine blade replacement device according to claim 7, characterized in that, The active component (200) also includes: A limiting plate (270) is provided on the clamp component (220); The first support rod (250) is rotatably mounted on the limiting plate (270). The second support rod (260) is threadedly connected to the first support rod (250), and the end of the second support rod (260) away from the first support rod (250) is used to connect to the end face of the blade (30).

9. The wind turbine blade replacement device according to claim 7, characterized in that, It also includes a third support rod (280) and an arc-shaped positioning plate (290), the third support rod (280) being connected to the arc-shaped positioning plate (290), the side of the third support rod (280) away from the arc-shaped positioning plate (290) being used to connect to the pitch bearing (20), and the side of the arc-shaped positioning plate (290) away from the third support rod (280) being used to abut against the clamp component (220).

10. The wind turbine blade replacement device according to any one of claims 1 to 6, characterized in that, Also includes: A first root component (600) is provided at the tip of the blade (30); The tail-fixing rope (500) is connected at one end to the first tail-root component (600) and at the other end to the movable component (200); The tail pull rope (700) is connected to the first tail pull component (600).

11. The wind turbine blade replacement device according to any one of claims 1 to 6, characterized in that, Also includes: The second root component (800) is disposed at the tip of the blade (30); The sling is connected at one end to the second chute component (800) and at the other end to the crane.

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