Replacement equipment for blades of wind driven generator

Abstract

The invention 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, and 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. According to the replacement equipment for the wind driven generator blade, 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 are solved, 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] The present invention relates to the technical field of wind power operation and maintenance, and in particular to a device for replacing blades of a wind turbine generator. Background Art

[0002] Wind turbine blades are key components in wind turbine equipment and are also the main basis for measuring the design and technical level of wind turbines. During long-term operation, blades are prone to damage due to factors such as increased operating life, extreme weather or insufficient maintenance, and need to be replaced. In the current conventional replacement process, due to their large size and extremely high weight, the blades need to be flipped at high altitude during lifting, which places high demands on lifting equipment and construction sites. Generally, they can only be disassembled and installed by large cranes or crawler cranes. However, wind farms in mountainous areas often face problems such as inconvenient transportation and small sites. It is difficult for large cranes to enter the site, and it is usually necessary to repair roads and repair the work site, which leads to a surge in construction costs and a longer cycle. Therefore, the blade replacement device urgently needs to be optimized and improved. Summary of the invention

[0003] The present invention provides a device for replacing wind turbine blades, which is used to solve the problems in the prior art of blade replacement relying on large cranes or crawler cranes and having strict requirements on construction sites. Through the coordinated action of a first fixed component, a movable component, a first steel wire rope and a drive component, the strict requirements of traditional lifting on site space and equipment tonnage can be reduced.

[0004] The present invention provides a device for replacing blades of a wind turbine generator, comprising: A first fixing assembly, used to be arranged on the pitch bearing; A movable component, used to be arranged on the blade, the movable component is provided with a movable pulley, and the movable pulley is located below the first fixed component; a first steel wire rope, wherein a first end of the first steel wire rope is fixed to the first fixing assembly; A driving assembly, wherein the second end of the first steel wire rope is wound around the movable pulley and coupled to the driving assembly, and the driving assembly is used to control the movement of the first steel wire rope.

[0005] According to the device for replacing blades of a wind turbine provided by the present invention, the driving assembly is used to be arranged on the blade, the pitch bearing or the ground; When the driving assembly is arranged on the blade or the ground, the first fixed assembly includes a fixed joint and a first fixed pulley arranged at intervals, the movable pulley is located between the fixed joint and the first fixed pulley, the first end of the first steel wire rope is fixed to the fixed joint, and the second end of the first steel wire rope is sequentially wound around the movable pulley and the first fixed pulley and coupled to the driving assembly.

[0006] According to the device for replacing blades of a wind turbine provided by the present invention, the driving assembly includes a hoisting component, and the hoisting component includes: A mounting base frame for setting on the ground; A first hoisting winch is rotatably disposed on the mounting frame, and the second end of the first steel wire rope is fixed to the first hoisting winch; The first motor is connected to the first winch, and the first motor is used to drive the first winch to rotate.

[0007] According to the device for replacing blades of a wind turbine provided by the present invention, the first hoist comprises: A reel, rotatably disposed on the mounting frame; a brake disc, disposed at one end of the reel; The hoisting component also includes: A first clamping member, disposed on one side of the brake disc; A second clamping member, disposed on the other side of the brake disc; A driving member is connected to the first clamping member and / or the second clamping member, and is used to control the distance between the first clamping member and the second clamping member.

[0008] According to the replacement device for wind turbine blades provided by the present invention, the first fixing assembly further includes a second fixed pulley; The hoisting component also includes: A second winch is rotatably mounted on the mounting frame; a second motor connected to the second winch; A second steel wire rope, wherein the first end of the second steel wire rope is connected to the second winch, the second end of the second steel wire rope is wound around the second fixed pulley, and the second winch is used to control the second end of the second steel wire rope to move in a vertical direction under the drive of the second motor.

[0009] According to the device for replacing blades of a wind turbine provided by the present invention, the driving assembly comprises: A hoist, the hoist is used to be fixed to the pitch bearing, the blade or the ground; the second end of the first steel wire rope is passed through the hoist, and the hoist is used to control the movement of the first steel wire rope; A rope collecting component is arranged on the path of the first steel wire rope at one side of the lower rope outlet of the hoist, and the rope collecting component is used to collect and release the first steel wire rope.

[0010] According to the replacement device for wind turbine blades provided by the present invention, the movable assembly further comprises a plurality of hoop components, a plurality of pulley mounting components and a plurality of pads, the hoop components and the pulley mounting components are connected along a ring-shaped preset path to form a hoop structure, and the hoop structure is used to be sleeved on the root of the blade; The movable pulley is arranged on the pulley mounting component, and the cushion block is used to connect the hoop component and the pulley mounting component; when the two hoop components are connected, the cushion block is also used to connect the hoop component and the adjacent hoop component; when the two pulley mounting components are connected, the cushion block is also used to connect the pulley mounting component and the adjacent pulley mounting component.

[0011] According to the device for replacing blades of a wind turbine provided by the present invention, the movable component further comprises: A limiting plate, arranged on the clamping hoop component; A first support rod rotatably disposed on the limiting plate; The second support rod is threadedly connected to the first support rod, and one end of the second support rod away from the first support rod is used to be connected to the end surface of the blade.

[0012] The equipment for replacing wind turbine blades provided according to the present invention also includes a third strut and an arc-shaped positioning plate, wherein the third strut is connected to the arc-shaped positioning plate, the side of the third strut away from the arc-shaped positioning plate is used to be connected to the pitch bearing, and the side of the arc-shaped positioning plate away from the third strut is used to abut against the clamp component.

[0013] The replacement device for wind turbine blades provided by the present invention further includes: A first root member, used to be arranged at the tip of the blade; A tail slide fixing rope, one end of which is connected to the first slide root component, and the other end of which is connected to the movable component; The tail rope is connected to the first root component.

[0014] The replacement device for wind turbine blades provided by the present invention further includes: A second root member, used to be arranged at the tip of the blade; A sling has one end connected to the second slide member and the other end used to be connected to the crane.

[0015] In the replacement device provided by the present invention, when in use, the first fixed component is fixed to the variable pitch bearing by bolt connection, so that the variable pitch bearing can be used to form a stable fulcrum for the hoisting of the first steel wire rope. Secondly, the movable pulley in the movable component is fixed to the blade, so that a coupling basis can be provided between the first steel wire rope and the blade. Based on this, the first steel wire rope takes the fixed joint as the starting end, passes through the movable pulley, and is coupled with the driving component after the direction is changed. In this way, a quick-release and quick-install temporary hoisting system can be composed of modular components. When the driving component releases the first steel wire rope, the increase in the length of the steel wire rope segments on both sides of the movable pulley causes the old blade to descend synchronously with the movable pulley; when the driving component recycles the steel wire rope, the movable pulley drives the new blade to rise under the action of the driving component and the first steel wire rope. Through the coordinated action of the first fixed component, the movable component, the first steel wire rope and the driving component, the blade can be replaced.

[0016] In addition, this double-rate wire rope hoisting structure can also effectively reduce the driving force required for the drive assembly. In addition, a single operation only requires the disassembly and installation of a single blade to be replaced, so that the remaining blades can maintain their original state. This targeted operation method can not only reduce the disturbance to other components of the unit, but also effectively shorten the construction period.

[0017] Compared with the prior art, in the replacement equipment provided by the present invention, the first fixed component is directly connected to the pitch bearing, so that the blade load that needs to be borne by a large crane in the traditional method can be transferred to the original structure of the wind turbine such as the pitch bearing for bearing. In this way, the dependence of the blade disassembly and assembly process on large cranes can be reduced, thereby solving the limitations on blade replacement caused by factors such as large cranes. In addition, the local lifting method of the pitch bearing does not require the impeller to be disassembled as a whole. The optimization of this replacement method not only reduces the stringent requirements of traditional lifting on site space and equipment tonnage, but also makes it possible to complete the replacement operation with only small equipment in mountainous areas or narrow terrains, which can effectively reduce the difficulty of blade replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall assembly of the lifting device provided by an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the assembly of the local structure of the lifting device provided by an embodiment of the present invention at the pitch bearing and the root of the blade.

[0021] Figure 3 It is a schematic diagram of the assembly of the partial structure of the lifting device provided by an embodiment of the present invention at the bottom of the tower.

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the hoisting component provided by an embodiment of the present invention when viewed from a top perspective.

[0023] Figure 5 It is a schematic diagram of the local structure of the bottom of the mounting base provided by an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the axial structure of the elevator provided in an embodiment of the present invention.

[0025] Figure 7 It is a schematic diagram of the axial structure of the rope collecting component provided in an embodiment of the present invention.

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the rope collecting component provided by an embodiment of the present invention when viewed from a top perspective.

[0027] Fig. 9 yes Figure 8 Schematic diagram of the local enlarged structure at point A in the middle.

[0028] Fig.10 It is a schematic diagram of the axial structure of the movable component provided by an embodiment of the present invention.

[0029] Fig.11 It is a schematic diagram of the assembly structure of the pulley mounting component and the movable pulley provided in an embodiment of the present invention.

[0030] Fig.12 It is a schematic diagram of the axial structure of the anti-slip support rod component provided by an embodiment of the present invention.

[0031] Fig.13 It is a working principle diagram of the first tail slide device provided in an embodiment of the present invention.

[0032] Fig.14 It is a schematic diagram of the assembly structure of the first tail slide device and the second tail slide device provided in an embodiment of the present invention.

[0033] Reference numerals: 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: movable pulley; 220: clamping hoop component; 230: pulley mounting component; 240: cushion block; 250: first support rod; 260: second support rod; 270: limit plate; 280: third support rod; 290: arc positioning plate; 300: first wire rope; 400: driving assembly; 410: hoisting component; 411: mounting base; 412: first hoist; 4121: drum; 4122: brake disc; 41 3: first motor; 414: first clamping member; 415: second clamping member; 416: driving member; 417: second steel wire rope; 418: second winch; 419: second motor; 420: hoist; 430: rope collecting member; 431: rope collecting bracket; 432: rope collecting drum; 4321: drum body; 4322: transmission plate; 433: third motor; 434: transmission shaft; 435: spring; 436: friction plate; 437: locking member; 438: chassis leveling member; 500: tail slide fixing rope; 600: first slide root member; 700: tail slide pull rope; 800: second slide root member; 900: wind rope. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] Figure 1 It is a schematic diagram of the overall assembly of the lifting device provided by an embodiment of the present invention.

[0039] For ease of understanding, the present invention first briefly describes the blade 30 and the pitch bearing 20 and related components. Figure 1 This article takes a three-blade generator as an example. The pitch bearing 20 is used to connect the hub in the rotor and the blades 30 in the rotor. Three mounting parts are provided on the hub (not shown in the figure). The angle between any two mounting parts is 120 degrees. Each mounting part corresponds to a pitch bearing 20. A plurality of bolt holes are arranged around the edge of the pitch bearing 20. The bolt holes are used to bolt the pitch bearing 20 to the blades 30.

[0040] It should be noted that the replacement device for wind turbine blades 30 provided in the embodiment of the present invention (hereinafter referred to as the replacement device for ease of description) is not limited to three-blade generators, but can also be two-blade generators, four-blade generators or five-blade generators, etc. When the replacement device is used for other types of generators, the setting of the replacement device can refer to the example given in this article for three-blade generators, which will not be described in detail here. It should also be noted that each replacement process of the replacement device provided in the embodiment of the present invention is only for one blade 30. If other blades 30 also need to be replaced, it is necessary to wait until the current blade 30 is replaced before performing the second round of replacement.

[0041] Figure 2 It is a schematic diagram of assembling a partial structure of a lifting device provided by an embodiment of the present invention at a pitch bearing and a blade root; Figure 3 It is a schematic diagram of the assembly of the partial structure of the lifting device provided by an embodiment of the present invention at the bottom of the tower.

[0042] See also Figures 1 to 3 , an embodiment of the present invention provides a replacement device, the replacement device includes a lifting device, the lifting device includes a first fixed component 100, a movable component 200, a first steel wire rope 300 and a driving component 400. The first fixed component 100 includes a fixed joint 110, and the fixed joint 110 can specifically adopt existing components such as a wedge joint, which is convenient for detachable connection; when in use, the fixed joint 110 is used to fix to the bottom of the pitch bearing 20 (here, the blade 30 to be replaced is located directly below the hub as a reference), that is, the side of the pitch bearing 20 facing the blade 30, and the fixed joint 110 can be fixed to the pitch bearing 20 by using the connecting bolts between the pitch bearing 20 and the blade 30.

[0043] In addition, in some optional embodiments, the fixed joint 110 can also be connected to components such as a wheel hub through additional components, as long as a suitable fulcrum is provided for the lifting device in the cabin. Specifically, it can be adaptively selected according to actual conditions.

[0044] The movable component 200 includes a movable pulley 210. When in use, the movable pulley 210 is used to be fixed to the root of the blade 30, and the movable pulley 210 needs to be arranged near the first fixed component 100 to facilitate the winding of the first steel wire rope 300. When in use, the first end of the first steel wire rope 300 is fixed to the fixed joint 110, and the second end of the first steel wire rope 300 extends from the fixed joint 110 to the movable pulley 210, and then extends to the driving component 400 after bypassing the movable pulley 210, and is coupled with the driving component 400. The driving component 400 is used to drive the first steel wire rope 300 to move.

[0045] The working principle of the lifting device is shown below.

[0046] Removing the old blade 30: After turning on the driving device, the driving device will control the first steel wire rope 300 to move from the driving device toward the movable pulley 210. As the first steel wire rope 300 moves, the first steel wire ropes 300 on both sides of the movable pulley 210 will gradually increase, and the movable pulley 210 will gradually decrease in the vertical direction. The blade 30 connected thereto will also move toward the ground. This process is the descending process of the blade 30.

[0047] Replace the new blade 30: After the old blade 30 is completely lowered to the ground, the movable component 200 is removed from the old blade 30 as a whole and installed on the new blade 30. After turning on the driving device, the driving device will control the first steel wire rope 300 and the automatic pulley 210 to move toward the driving device. As the first steel wire rope 300 moves, the first steel wire ropes 300 on both sides of the movable pulley 210 will gradually become shorter, 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 variable pitch bearing 20 at the top of the wind turbine until it is docked with the variable pitch bearing 20. This process is the rising process of the blade 30.

[0048] See also Figures 1 to 3 It can be understood that in the replacement device provided by the embodiment of the present invention, when in use, the first fixed assembly 100 is fixed to the pitch bearing 20 by bolt connection, so that the pitch bearing 20 can be used to form a stable fulcrum for the hoisting of the first steel wire rope 300. Secondly, the movable pulley 210 in the movable assembly 200 is fixed to the blade 30, so that a coupling basis can be provided between the first steel wire rope 300 and the blade 30. Based on this, the first steel wire rope 300 starts from the fixed joint 110, passes through the movable pulley 210, and is coupled to the driving component 400 after the direction is changed. In this way, a quick-release and quick-install temporary lifting system can be composed of modular components. When the driving component 400 releases the first steel wire rope 300, the increase in the length of the steel wire rope segments on both sides of the movable pulley 210 causes the old blade 30 to drop synchronously with the movable pulley 210; when the driving component 400 recycles the steel wire rope, the movable pulley 210 drives the new blade 30 to rise under the action of the driving component 400 and the first steel wire rope 300. Through the coordinated action of the first fixed component 100, the movable component 200, the first steel wire rope 300 and the driving component 400, the blade 30 can be replaced.

[0049] In addition, this double-rate wire rope hoisting structure can also effectively reduce the driving force required for the drive assembly 400. In addition, a single operation only requires disassembly and assembly of a single blade 30 to be replaced, so that the remaining blades 30 can maintain their original state. This targeted operation method can not only reduce the disturbance to other components of the unit, but also effectively shorten the construction period.

[0050] Compared with the prior art, in the replacement equipment provided in the embodiment of the present invention, the first fixing component 100 is directly connected to the pitch bearing 20, so that the load of the blade 30 that needs to be borne by a large crane in the traditional method can be transferred to the original structure of the wind turbine such as the pitch bearing 20 for bearing. In this way, the dependence of the blade 30 disassembly and assembly process on the large crane can be reduced, thereby solving the limitations on the replacement of the blade 30 caused by factors such as large cranes; in addition, the local lifting method of the pitch bearing 20 does not require the impeller to be disassembled as a whole. The optimization of this replacement method not only reduces the stringent requirements of traditional lifting on site space and equipment tonnage, but also makes it possible to complete the replacement operation with only small equipment in mountainous areas or narrow terrains, which can effectively reduce the difficulty of replacing the blade 30.

[0051] See also Figures 1 to 3 As shown, in an optional embodiment of the present invention, when setting the lifting device, a lifting device can be set on both sides of the blade 30 respectively, and the line connecting the positions of the movable pulleys 210 in the two sets of lifting devices on the blade 30 needs to pass through the center of the blade 30, so that the overturning problem caused by the center of gravity shift can be avoided. 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, such as three or four lifting devices. It can be understood that the lifting devices symmetrically arranged on both sides of the present embodiment can lift or lower the blade 30 from both sides of the blade 30 respectively. This two-hanging point method can simplify the required components and ensure the stability of the blade 30.

[0052] Continue reading Figure 2 and Figure 3 In an optional embodiment of the present invention, when in use, the position of the drive assembly 400 has multiple options. 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 steel wire rope 300 needs to pass through the bottom of the movable pulley 210 and will change the moving direction once at the movable pulley 210, the first fixed assembly 100 also needs to be provided with a first fixed pulley 120 to change the direction of the first steel wire rope 300 for a second time. The first fixed pulley 120 and the aforementioned fixed joint 110 are arranged at intervals, 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.

[0053] When in use, the first end of the first steel wire rope 300 is fixed to the fixed joint 110, and the second end of the first steel wire rope 300 needs to be wound around the movable pulley 210 and the first fixed pulley 120 in sequence. After winding around the first fixed pulley 120, the first steel wire rope 300 extends to the driving assembly 400 and is coupled with the driving assembly 400. If the driving assembly 400 is set on the ground, the second end of the first steel wire rope 300 needs to be pulled downward to the ground, such as Figure 2 and Figure 3 shown.

[0054] It can be understood that, based on the aforementioned embodiment, in the embodiment of the present invention, the setting position of the drive assembly 400 can be adaptively selected according to the actual situation, which enables the replacement device to have a variety of flexible setting schemes in actual use, and can provide targeted solutions for different actual environments and actual needs, thereby effectively improving the construction efficiency and reducing the difficulty of actual construction. Furthermore, when it is inconvenient to work at high altitudes, the first fixed pulley 120 is set to change the direction of the first steel wire rope 300 for a second time, which can provide a structural foundation for the drive assembly 400 to be set on the ground, so that it is convenient for the operator to implement lifting control on the ground, which can reduce the difficulty of installation and control of the replacement device.

[0055] Figure 4 It is a schematic diagram of the cross-sectional structure of the hoisting component provided by an embodiment of the present invention when viewed from a top perspective.

[0056] See also Figure 3 and Figure 4 In an optional embodiment of the present invention, the driving assembly 400 includes a hoisting component 410. As described in the above-mentioned embodiment, the hoisting component 410 can be set on any one of the blade 30, the pitch bearing 20 and the ground. In the embodiment of the present invention, the hoisting component 410 is set on the ground as an example for description.

[0057] 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 understood in a broad sense. For example, the mounting base 411 can also be set on a transport vehicle or a support platform on the ground.

[0058] The first winch 412 is rotatably disposed on the mounting base 411. After the second end of the first wire rope 300 leaves the first fixed pulley 120, it will extend downward to the first winch 412 and be connected to the first winch 412. During the rotation, the first winch 412 will drive the first wire rope 300 to be retracted or released. The first motor 413 is connected to the first winch 412. The first motor 413 serves as a power source to drive the first winch 412 to rotate. The first motor 413 can be disposed on the mounting base 411 or separately on the outside of the mounting base 411. It can be adaptively designed according to actual conditions.

[0059] It can be understood that in the replacement device provided in the embodiment of the present invention, the mounting base 411 serves as a bearing base, and is rigidly connected to the first winch 412 by fasteners such as bolts, which not only ensures the structural stability of the winch mechanism during dynamic traction, but also allows the winch component 410 to be quickly installed and maintained through a detachable design; in addition, the connection method between the first motor 413 and the mounting base 411 retains the flexibility of the installation position (base or outside), which can avoid layout conflicts caused by space limitations while ensuring power transmission efficiency, and is conducive to improving the flexibility of the winch component 410.

[0060] See also Figure 3 As described in the above embodiments, when two groups of components such as the first fixing assembly 100 and the movable pulley 210 are provided, two groups of hoisting components 410 also need to be provided correspondingly and arranged at a relative interval, and the spacing between the two groups of hoisting 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 hoisting components 410, and there is no positional interference between the three, so as to ensure sufficient working space. As described above, the number and position of the hoisting components 410 can be adaptively set according to actual conditions. The case where three or four hoisting components 410 are provided can refer to the implementation of two hoisting components 410, and will not be described in detail herein.

[0061] In an optional embodiment of the present invention, a force sensor can also be set 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 gravity of the blade 30 can be detected through simple calculation; further, the detection threshold of the force sensor can be set, and the detection threshold is associated with the rated load of the winch component 410. At the same time, a reminder component connected to the force sensor is set, such as an alarm light or a buzzer alarm. When the actual detection value exceeds the threshold, the reminder component can be used to alert nearby staff that the winch component 410 is overloaded. This can prevent overload operations and ensure safety during the lifting process.

[0062] Continue reading Figure 4In an optional embodiment of the present invention, the hoisting component 410 also includes a safety brake component, which includes a first clamping component 414, a second clamping component 415 and a driving component 416. Accordingly, the first hoisting component 412 includes a drum 4121, a transmission shaft 434 and a brake disc 4122. The transmission shaft 434 is rotatably disposed on the mounting base 411 and is connected to the first motor 413. The drum 4121 is sleeved on the transmission shaft 434. The brake disc 4122 is disposed at the end of the drum 4121 and can be disposed on one side or on both sides.

[0063] Taking the single-sided setting as an example, the first clamping member 414 and the second clamping member 415 are relatively arranged on both sides of the brake disc 4122, and 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 a pump station and a telescopic cylinder are set as the driving member 416. When in use, if the first motor 413 or the deceleration structure inside the first winch 412 fails, and the drum 4121 rotates freely under the drive of the weight of the blade 30, the driving member 416 can be immediately started 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 action of the gravity of the blade 30, thereby preventing the blade 30 from falling and being damaged, and even threatening the personal safety of surrounding operators, thereby effectively improving the safety of the winch component 410.

[0064] See also Figure 2 and Figure 4 In an optional embodiment of the present invention, the first fixed assembly 100 also includes a second fixed pulley 130, which is arranged on the pitch bearing 20 and is located near the first fixed pulley 120 and the fixed joint 110; the hoisting component 410 also includes an auxiliary lifting component, the auxiliary lifting component includes a second steel wire rope 417, a second hoist 418 and a second motor 419, the second hoist 418 is rotatably arranged on the mounting base 411, and the specific arrangement method is similar to the aforementioned first hoist 412; the second motor 419 is connected to the second hoist 418, and the arrangement method of the second motor 419 is also similar to the aforementioned first motor 413.

[0065] One end of the second steel wire rope 417 is fixedly connected to the second hoist 418, and the second end of the second steel wire rope 417 extends upward to the second fixed pulley 130, and naturally droops after passing the second fixed pulley 130. The second hoist 418 is used to control the second end of the second steel wire rope 417 to move in the vertical direction under the drive of the second motor 419. In an optional embodiment of the present invention, a plurality of second fixed pulleys 130 can be provided to guide the direction and position of the second steel wire rope 417, and the second hoist 418 and the second motor 419 can also be separately provided outside the mounting base 411, and specifically, can be adaptively designed according to actual conditions.

[0066] It is understandable that due to the heavy weight of the blade 30, in order to meet the load-bearing requirements, the weight of components such as the first wire rope 300, the fixed joint 110, the first fixed pulley 120 and the movable assembly 200 is also heavy, and manual handling is time-consuming and labor-intensive. In the embodiment of the present invention, an auxiliary lifting component is provided, so that when in use, the first wire rope 300, the fixed joint 110, the first fixed pulley 120 and the movable assembly 200 and other components can be fastened to the second end of the second wire rope 417, and these components can be hoisted to the variable pitch bearing 20 and the blade 30 by controlling the second winch 418, which can effectively improve the installation efficiency of the replacement equipment and thus effectively shorten the construction period.

[0067] Figure 5 It is a schematic diagram of the local structure of the bottom of the mounting base provided by an embodiment of the present invention.

[0068] See also Figure 4 and Figure 5 In an optional embodiment of the present invention, a base frame leveling member 438 is provided on each side of the root of the mounting base frame 411, and the base frame leveling member 438 is composed of a support plate, an adjusting screw, a locking nut, and a support block. The support plate is connected to the mounting base frame 411, and the adjusting screw is connected to the support plate by a threaded connection. The support block is provided at the bottom of the adjusting screw, and the two are rotatably matched. The locking nut is sleeved at the root of the adjusting screw, and the height can be adjusted up and down by twisting the adjusting screw. When the working site is concave relative to the flange surface at the root of the tower 10, the leveling member can make the mounting base frame 411 still be installed horizontally, thereby effectively improving the adaptability of the hoisting component 410 to different environments.

[0069] Continue reading Figure 5 In an optional embodiment of the present invention, the chassis leveling member 438 also includes a rubber pad, which is arranged 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 adaptively set according to actual conditions.

[0070] Figure 6 is a schematic diagram of the shaft side structure of the hoist 420 provided in an embodiment of the present invention; Figure 7 It is a schematic diagram of the axial structure of the rope collecting component 430 provided in an embodiment of the present invention.

[0071] See also Figure 6 and Figure 7 In an optional embodiment of the present invention, different from the aforementioned embodiment, in the embodiment of the present invention, the driving assembly 400 includes a hoist 420, a mounting frame, a rope guide wheel and a rope collecting component 430, wherein the hoist 420, the mounting frame and the rope guide wheel are connected as a whole by fasteners; the hoist 420 includes an upper rope outlet and a lower rope outlet, which are relatively arranged at the upper and lower ends of the hoist 420, and the rope guide wheel is arranged directly below the lower rope outlet; similar to the above, the mounting frame can be installed to the variable pitch bearing 20, the blade 30 or the ground.

[0072] When in use, the second end of the first steel wire rope 300 will enter the hoist 420 from the upper rope outlet of the hoist 420 after leaving the automatic pulley 210 (when the hoist 420 is set on the pitch bearing 20); if the hoist 420 is set on the ground or the blade 30, it is also necessary to set the first fixed pulley 120 as mentioned above to reverse the first steel wire rope 300, see the previous text for details.

[0073] Inside the hoist 420, the second end of the first steel wire rope 300 will be coiled around the grooved inner gear ring and compressed by the rope pressing mechanism, and then leave the hoist 420 from the lower rope outlet; after leaving the hoist 420, the first steel wire rope 300 will pass through the guide rope wheel and continue to extend to the far end. The brake motor on the hoist 420 will drive the grooved inner gear ring to rotate after deceleration through the worm gear and gear pair, thereby realizing the movement of the first steel wire rope 300.

[0074] A sufficient length of the first steel wire rope 300 needs to be retained after leaving the hoist 420. This section of the first steel wire rope 300 is in a free state, which is prone to accumulation or knotting problems. In the embodiment of the present invention, the rope collecting component 430 is arranged on the moving path of the first steel wire rope 300 leaving the hoist 420. The second end of the first steel wire rope 300 is fixed to the rope collecting component 430 after leaving the hoist 420. The rope collecting component 430 is used to reel in the first steel wire rope 300.

[0075] The installation position of the rope collecting component 430 can be adaptively selected according to the position of the hoist 420. For example, when the hoist 420 is set on the pitch bearing 20, the rope collecting component 430 can be set on the pitch bearing 20, the blade 30 or the ground; when the hoist 420 is set on the blade 30, the rope collecting component 430 can be set on the blade 30 or the ground; when the hoist 420 is set on the ground, the rope collecting component 430 can be set on the ground.

[0076] It is understandable that in the replacement device provided by the embodiment of the present invention, the hoist 420 is used as a power source. During use, after the automatic pulley 210 of the first steel wire rope 300 enters the upper rope outlet of the hoist 420, it is orderly coiled through the inner gear ring with grooves and compressed by the rope pressing mechanism. Combined with the torque amplification effect of the worm gear reduction mechanism, the moving speed and moving direction of the first steel wire rope 300 can be accurately adjusted. Secondly, the layout of the guide rope wheel located directly below the lower rope outlet can constrain the rope outlet angle of the first steel wire rope 300, thereby avoiding friction loss between the first rope and the edge of the equipment. In addition, the rope collecting component 430 can reel in the free section of the first steel wire rope 300 extending to the far end in real time, thereby solving the problems of entanglement, knotting or being covered with mud caused by the free falling of the rope. At the same time, the rope collecting component 430 maintains the tension state of the rope and ensures the continuity of the lifting process.

[0077] It can also be understood that when the hoist 420 or the winch component 410 is set on the blade 30, the connection point here can add a lifting point on the blade 30, that is, in this case, a single lifting device can provide two coupling points for the blade 30 and the first wire rope 300. This design can effectively disperse the weight of the blade 30, thereby improving the stability and safety during the lifting process.

[0078] See also Figure 6 In an optional embodiment of the present invention, the rope collecting component 430 includes a rope collecting bracket 431, a rope collecting drum 432, a third motor 433 and a transmission shaft 434. The second end of the first steel wire rope 300 is fixed to the rope collecting drum 432, and the rope collecting drum 432 is sleeved on the transmission shaft 434. The transmission shaft 434 is rotatably arranged on the rope collecting bracket 431. The third motor 433 is arranged on one side of the rope collecting bracket 431, and the output shaft of the third motor 433 is connected to the transmission shaft 434. The third motor 433 is used to drive the transmission shaft 434 and the rope collecting drum 432 to rotate.

[0079] It can be understood that when the hoist 420 drives the first steel wire rope 300 to move, the third motor 433 will drive the transmission shaft 434 and the rope drum 432 to rotate in the corresponding direction, and the rotation of the rope drum 432 will release or recycle the first steel wire rope 300, thereby meeting the length change requirement of the first steel wire rope 300 on both sides of the movable pulley 210; in this process, the length change of the first steel 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 recovery action of the rope drum 432, thereby maintaining a constant tension of the first steel wire rope 300 between the hoist 420 and the rope drum 432.

[0080] Figure 8 is a schematic diagram of the cross-sectional structure of the rope collecting component provided by an embodiment of the present invention when viewed from a top perspective; Fig. 9 yes Figure 8 Schematic diagram of the local enlarged structure at point A in the middle.

[0081] See also Figure 7 and Figure 8 In an optional embodiment of the present invention, the rope collecting drum 432 includes a drum body 4321 and a transmission plate 4322, the transmission plate 4322 is located inside the drum body 4321, and the two are fixedly connected; or the transmission plate 4322 is provided at the end of the drum body 4321, serving as an end plate of the drum body 4321; in the above two cases, the transmission plate 4322 is sleeved on the transmission shaft 434 and rotatably cooperates 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, in the case where 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 shown.

[0082] Correspondingly, the rope collecting component 430 further includes a spring 435, a friction plate 436 and a locking member 437. The friction plate 436, the spring 435 and the locking member 437 are sequentially sleeved on the transmission shaft 434, and the side of the friction plate 436 away from the spring 435 abuts against the transmission plate 4322 and fits with the transmission plate 4322. The locking member 437 is threadedly matched with the transmission shaft 434, and the friction plate 436 is used to drive the transmission plate 4322 to rotate under the drive of the transmission shaft 434. Among them, the spring 435 can select existing components such as a coil spring 435 or a disc spring, and the locking member 437 can select existing components such as a nut.

[0083] When in use, the elastic potential energy stored in the spring 435 can be changed by rotating the locking piece 437. The cooperation between the locking piece 437 and the spring 435 will provide a pre-tightening force, so that the supporting friction plate 436 can fit tightly 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.

[0084] It is understandable that as the number of layers of the first steel wire rope 300 wound on the rope drum 432 increases or decreases, the linear speed of the rope drum 432 will also increase or decrease accordingly; however, the speed of the hoist 420 is constant, so during the process of collecting or releasing the rope, there will inevitably be a mismatch between the speeds of the motor and the hoist 420. The accumulation of this phenomenon will cause the first steel wire rope 300 to become tighter and tighter, or looser and looser, or first loose and then tight; when the first steel wire rope 300 is in a relaxed state, the first steel wire rope 300 on the drum 4321 will inevitably become more and more tangled; and when the first steel wire rope 300 becomes tighter and tighter, it will eventually exceed the load of the motor and damage the motor.

[0085] In an optional embodiment of the present invention, the transmission shaft 434 transmits torque through the static friction contact between the friction plate 436 and the transmission plate 4322, so that the transmission plate 4322 rotates synchronously with the transmission shaft 434 under normal working conditions, and when the load of the rope drum 432 suddenly changes, relative sliding can occur between the friction plate 436 and the transmission plate 4322, thereby avoiding overload damage to the transmission system. Further, the threaded cooperation between the spring 435 and the locking member 437 produces an adjustable preload force, and the compression amount of the spring 435 can be adjusted by twisting the locking member 437 to set a constant friction torque, that is, the rope drum 432 can have an adjustable and constant output torque characteristic. When the number of layers of the first steel wire rope 300 increases or decreases, the locking member 437 is adaptively adjusted accordingly, so that the problem caused by the mismatch between the speed of the motor and the hoist 420 can be solved, thereby ensuring that the first steel wire rope 300 is smooth and not tangled during the rope collection process.

[0086] In some optional embodiments, when the number of the transmission plates 4322 is greater than or equal to two, the number of the friction plates 436 may be increased accordingly, and the friction plates 436 are correspondingly arranged on one side of the increased transmission plates 4322 and maintained in a fitted state. Figure 8 The figure shows a case where two transmission plates 4322 are provided. Specifically, along the direction of the transmission shaft 434, a locking member 437, a spring 435, a friction plate 436, a transmission plate 4322, a transmission plate 4322 and a friction plate 436 are sequentially sleeved; when pre-tightened, the locking member 437 squeezes the spring 435, the spring 435 squeezes the first friction plate 436 and the first transmission plate 4322, and the locking force is transmitted to the second transmission plate 4322 through the cylinder 4321, and the second transmission plate 4322 squeezes 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, and then the load requirements under different working conditions can be matched by increasing or decreasing the number of friction plates 436.

[0087] See also Figure 8 and Fig. 9 In an optional embodiment of the present invention, the rope collecting component 430 also includes a pressure plate and a copper sleeve. The pressure plate is arranged 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 the contact area between the spring 435 and the friction plate 436, thereby making the stress transfer between any two components more uniform; a shaft sleeve is welded in the middle of the transmission plate 4322, and the copper sleeve is arranged between the shaft sleeve and the transmission shaft 434. When relative rotation occurs between the transmission plate 4322 and the transmission shaft 434, the specific relative rotation occurs between the copper sleeve and the shaft sleeve, thereby preventing wear of the transmission shaft 434 and the transmission plate 4322.

[0088] Fig.10 It is a schematic diagram of the axial structure of the movable component provided by an embodiment of the present invention; Fig.11 It is a schematic diagram of the assembly structure of the pulley mounting component and the movable pulley provided in an embodiment of the present invention.

[0089] See also Fig.10 and Fig.11 In an optional embodiment of the present invention, the movable component 200 includes a plurality of hoop components 220, a plurality of pulley mounting components 230 and a plurality of pads 240. The hoop components 220 and the pulley mounting components 230 are connected along a preset annular path. The annular structure is used to form a hoop structure, and the hoop structure is used to be sleeved on the root of the blade 30; wherein the pulley mounting component 230 is used to set the movable pulley 210, and the pad 240 is used to connect the hoop component 220 and the pulley mounting component 230.

[0090] Specifically, Fig. 9 As shown, in the embodiment of the present invention, two pulley mounting components 230 are provided, and the two pulley mounting components 230 are relatively arranged on a preset annular path, and a plurality of hoop components 220 are evenly arranged on the arc segment between the two pulley mounting components 230, and a pad 240 is arranged between the pulley mounting component 230 and the hoop component 220, and is also arranged between any two adjacent hoop components 220, that is, in this example, the pad 240 is also used to connect any two adjacent hoop components 220.

[0091] In an optional embodiment of the present invention, the number and arrangement of the hoop components 220 and the pulley mounting components 230, as well as the specific form of the hoop components 220, can be adaptively selected. For example, the hoop component 220 between the two pulley mounting components 230 in the aforementioned example can also be an integrated structure; for another example, one, three or five pulley mounting components 230 can also be provided; for another example, in the case of providing multiple pulley mounting components 230, interconnected pulley mounting components 230 can also be provided. In this case, corresponding components such as the first fixing assembly 100 can be provided. Secondly, in this case, the pad 240 is also used to connect any two adjacent pulley mounting components 230.

[0092] Further, in an optional embodiment of the present invention, the thickness of the pad 240 can be adaptively adjusted, and the number of pads 240 between the clamp component 220 and the pulley mounting component 230 can also be adaptively increased. In these two ways, the size of the clamp structure can be adaptively adjusted at any time to meet the diameters of blades 30 of different models. In an optional embodiment of the present invention, the size of the clamp structure can also be changed at any time by adjusting the number of the clamp components 220. Specifically, it can be adaptively set according to actual conditions.

[0093] The fixing principle of the hoop structure is: by tightening the fasteners between the hoop components 220 and the hoop components 220, between the hoop components 220 and the pulley mounting components 230, or between the pulley mounting components 230 and the pulley mounting components 230, so that the fasteners reach a predetermined pre-tightening force value, the inner ring of the hoop structure will shrink and squeeze the root of the blade 30, giving the root of the blade 30 a circle of annular positive pressure, thereby causing the hoop structure and the root of the blade 30 to generate friction, so that the hoop structure and the blade 30 form a temporary whole.

[0094] It can be understood that in the replacement device provided in the embodiment of the present invention, by constructing the movable component 200 into a modular annular structure including a clamp component 220, a pulley mounting component 230 and a pad 240, an adjustable friction fixation between the clamp structure and the root of the blade 30 can be achieved based on the preload force of the fastener, thereby providing a non-invasive and size-adaptable coupling basis for the installation of the movable pulley 210.

[0095] Specifically, the connection method between 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 gasket 240 and the variability of the number of components, can enable the inner ring size of the annular structure to be continuously or discretely adjusted by adding or reducing the gasket 240 or adjusting the number of components, so as to adapt 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 friction force between the root of the blade 30, so that damage to the blade 30 body caused by traditional welding or bolt penetration can be avoided, and the mechanical stability required for temporary fixation can be ensured.

[0096] In addition, the relative positions of the pulley mounting component 230 and the clamp component 220 can be adaptively arranged based on the layout requirements of the movable pulley 210, for example, two pulley mounting components 230 are symmetrically arranged to balance the force, or the rigidity distribution of the annular structure is optimized by increasing or decreasing the number of clamp components 220. This design that takes into account both functional expansion and structural optimization can provide customizability and better reliability of the coupling basis of the blade 30 without changing the basic connection logic.

[0097] Fig.12 It is a schematic diagram of the axial structure of the anti-slip support rod component provided by an embodiment of the present invention.

[0098] See also Figure 2 and Fig.12In an optional embodiment of the present invention, the movable component 200 also includes an anti-slip support rod component, which 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 and the limiting plate 270 are rotatably connected. The end of the first support rod 250 away from the limiting plate 270 is a rod thread structure, and the second support rod 260 has a corresponding pipe thread structure. The two are threaded together. A connecting plate is provided at the end of the second support rod 260 away from the first support rod 250, and the connecting plate is used to connect to the root of the blade 30.

[0099] It should be noted that a wrench operation 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 a wrench to change the overall length of the anti-slip support rod component.

[0100] When in use, the blade 30 can be lowered by one end, and the connecting plate can be connected to the flange interface at the root of the blade 30 by bolts; further, the first support rod 250 is screwed to adjust the overall length of the first support rod 250 and the second support rod 260, so that the limit plate 270 is pressed against the hoop component 220, and then the limit plate 270 and the hoop component 220 are connected as a whole by bolts, so that the anti-slip support rod component and the hoop structure form a temporary integrated 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, and the embodiment of the present invention does not limit this.

[0101] It can be understood that in the replacement device provided in the embodiment of the present invention, the first support rod 250 and the second support rod 260 form a telescopic structure with adjustable length through the cooperation of the rod thread and the pipe thread, combined with the rotatable connection between the limit plate 270 and the clamping hoop component 220, so that the operator can press and fix the limit plate 270 to the surface of the clamping hoop component 220 by rotating the first support rod 250, and then increase the connection point between the movable component 200 and the blade 30 on the basis of the combination of the clamping hoop structure and the blade 30, so that a multi-point mechanical coupling structure can be formed between the movable component 200 and the root of the blade 30.

[0102] Compared with the single fixing method that only relies on the friction force of the clamp structure, the introduction of the anti-slip strut component superimposes the mechanical locking force formed by the flange bolt connection on the basis of the friction constraint generated by the original annular positive pressure, thereby overcoming the risk of loosening caused by vibration or load impact due to simple friction fixation, effectively improving the anti-slip stability of the movable component 200, and thus ensuring the safety and reliability of the blade 30 during lifting.

[0103] Continue reading Figure 2The movable assembly 200 further 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, and one end of the third support rod 280 away from the arc-shaped positioning plate 290 is used to connect to the variable pitch bearing 20, and the third support rod 280 can be fixed by bolts on the outer ring of the bottom of the variable pitch bearing 20, and the side of the arc-shaped positioning plate 290 away from the third support rod 280 is used to abut against the hoop component 220. It should be noted that the number of the third support rod 280 and the arc-shaped positioning plate 290 can be adaptively set, and the present invention does not make specific requirements for this.

[0104] It can be understood that when installing the clamp component 220, the installation position of the clamp component 220 can be positioned by the arc-shaped positioning plate 290, so that the installation efficiency of the clamp component 220 can be effectively improved; secondly, the arc-shaped positioning plate 290 can also provide a temporary foothold for the operator, which is convenient for the operator to operate and facilitates the installation of the clamp component 220; on the other hand, it can ensure the safety of the operator.

[0105] Fig.13 is a working principle diagram of a first tail slide device provided in an embodiment of the present invention; Fig.14 It is a schematic diagram of the assembly structure of the first tail slide device and the second tail slide device provided in an embodiment of the present invention.

[0106] See also Fig.13 and Fig.14 In an optional embodiment of the present invention, the replacement equipment also includes a first tail slide device, which includes a tail slide fixing rope 500, a first root slide component 600 and a tail slide pull rope 700. One end of the tail slide fixing rope 500 is connected to the first root slide component 600, and the other end is connected to the clamping hoop component 220 or the pulley mounting component 230 in the movable component 200. The first root slide component 600 is used to be installed to the tip of the blade 30. The first root slide component 600 can specifically be an annular component. One end of the first tail slide pull rope 700 is connected to the first root slide component 600, and the other end of the first tail slide pull rope 700 naturally hangs down to the ground.

[0107] When in use, the first root component 600 can be lifted to the tip of the blade 30 by the auxiliary lifting component in the aforementioned embodiment, and guided into a predetermined position at the tip of the blade 30, and then the first 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; wherein, the size of the first root component 600 can be adaptively set according 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 temporary fixation can be achieved based on the tail fixing rope 500.

[0108] It can be understood that, since the installation of the blade 30 is at an angle a to the vertical plane, the root flange surface of the blade 30 is not horizontal after installation, but is at a certain angle to the horizontal plane. Based on this, the bolts set on the blade 30 also form a certain angle with the vertical plane, which results in the old blade 30 being required to maintain its original tilted posture for lowering during the initial disassembly and hanging stage, and the same is true for the tail docking stage of the new blade 30. In the replacement device provided in the embodiment of the present invention, a tail fixing rope 500, a first root component 600 and a tail pull rope 700 are provided. In this way, in the initial lowering stage of the old blade 30 and the rising and finishing stage of the new blade 30, the posture of the blade 30 can be changed by pulling the tail pull rope 700, so that the blade 30 forms a certain angle with the vertical plane, thereby reducing the risk of position interference between the bolt rod on the blade 30 and the pitch bearing 20, thereby improving the safety and stability during the hoisting process, and at the same time providing convenience for the docking of the new blade 30 with the pitch bearing 20.

[0109] Continue reading Fig.13 In an optional embodiment of the present invention, the replacement device also includes a wind rope 900, which is fixed to the tail of the blade 30. The specific setting method is similar to 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 inclination of the blade 30, the tail pull rope 700 can also be used as the wind rope 900. Specifically, it can be adaptively set according to actual conditions.

[0110] Continue reading Fig.14 In an optional embodiment of the present invention, the replacement equipment also includes a second tail device, the second tail device includes a second root component 800 and a sling, one end of the sling is connected to the second root component 800, and the other end of the sling is used to connect to the crane, the second root component 800 is used to be arranged at the tip of the blade 30, the specific structure of the second root component 800 is similar to the first root component 600, and the specific setting position of the second root component 800 is close to the first root component 600, and can be adaptively set according to actual conditions.

[0111] It can be understood that when the blade 30 is lowered vertically and close to the ground, the sling can be pulled by a crane, in conjunction with the drive assembly 400, to gradually flatten the blade 30; when the blade 30 needs to be lifted, on the contrary, the sling can be pulled by a crane, in conjunction with the drive assembly 400, to first lift the blade 30 horizontally to a certain height, and then gradually adjust the blade 30 to a vertical state; this arrangement can avoid the tip of the blade 30 from rubbing against the ground during the lifting process, and can ensure the integrity of the blade 30.

[0112] In an optional embodiment of the present invention, rubber pads or rollers may be provided on the inner sides of the aforementioned first root component 600 and the second root component 800, so as to prevent the first root component 600 and the second root component 800 from scratching the surface of the blade 30 when the blade 30 is sleeved, thereby ensuring the integrity of the blade 30.

[0113] An optional method for replacing blades 30 corresponding to the replacement device provided by the present invention is shown below.

[0114] Step 1: Install the ground components of the blade 30 replacement device (such as two hoisting components 410 ) on the root flange of the tower 10 .

[0115] Step 2: Use a turning wheel to rotate the blade 30 to be removed to the top.

[0116] Step three: Install the first fixing assembly 100 , the third support rod 280 and the arc-shaped positioning plate 290 at a predetermined position on the outer ring of the pitch bearing 20 .

[0117] Step 4: Install the movable assembly 200 at a predetermined position at the root of the blade 30 .

[0118] Step 5: Use the turning wheel to rotate the impeller again, and rotate the blade 30 to be removed to the bottom.

[0119] Step 6: Use the auxiliary lifting component to install the first root component 600 to the predetermined position of the tip of the blade 30, and connect it to the movable component 200 with the tail fixing rope 500.

[0120] Step 7: Use auxiliary lifting components to lift the first steel wire rope 300 on the ground to the fixed joint 110 and fix it.

[0121] Step 8: Replace the connecting nuts of the blade 30 and the pitch bearing 20 symmetrically and evenly with at least 8 longer stud bolt assemblies (such as Figure 2 As shown, the installed stud bolts need to be a certain distance higher than the upper end surface of the pitch bearing 20. The purpose of replacing several longer stud bolt assemblies is to ensure that the blades 30 will not slip and fall when they are lowered a certain distance before installing the movable assembly 200).

[0122] Step nine: With the cooperation of the driving assembly 400 and the first tail device, the blade 30 is lowered a certain distance (the function of this distance is to ensure the smooth installation of the second support rod 260).

[0123] Step 10: Install the anti-slip support rod assembly.

[0124] Step 11: Remove the stud bolt assembly, and after all the bolt rods at the root of the blade 30 have been withdrawn from the pitch bearing 20, loosen the tail rope 700.

[0125] Step 12: Continue to lower the blade 30 until the blade 30 is close to the ground.

[0126] Step 13: The crane lifts the second chute component 800 through the sling and puts it on the predetermined position of the blade tip. Under the action of the crane and the second chute component 800, the blade 30 is placed horizontally on the ground.

[0127] The lifting and installation of the new blade 30 can be carried out in the reverse order of the above.

[0128] 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 in the circumferential direction of the pitch bearing 20 relative to the pulley mounting component 230 need to consider three factors.

[0129] Factor 1: During the movement of the first steel wire rope 300 , the inclination angle of the first steel wire rope 300 is within the inclination angle range allowed by the first hoist 412 .

[0130] Factor 2: When the blade 30 and the pitch bearing 20 are not separated, the angle of the first steel wire rope 300 on both sides of the movable pulley 210 is the largest. This state will increase the force on the first steel wire rope 300, so the arrangement position of the first fixed pulley 120 and the fixed joint 110 should reduce the angle here as much as possible.

[0131] Factor 3: The installation positions of the first fixed pulley 120 and the fixed joint 110 also affect the force and the inclined angle of the tail rope 700 on the first root component 600. Therefore, the position arrangement of the first fixed pulley 120 and the fixed joint 110 also needs to reduce the force and the inclined angle of the tail rope 700 as much as possible.

[0132] It should be noted that the technical solutions in various embodiments of the present invention can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present invention.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

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

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

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

4. The wind turbine blade replacement device according to claim 3, characterized in that: The first hoist (412) comprises: A reel (4121) rotatably disposed on the mounting base (411); A brake disc (4122) is arranged at one end of the reel (4121); The hoisting component (410) further includes: A first clamping member (414) is provided on one side of the brake disc (4122); A second clamping member (415) is disposed on the other side of the brake disc (4122); A driving member (416) is connected to the first clamping member (414) and / or the second clamping member (415), and is used to control the distance 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 assembly (100) further comprises a second fixed pulley (130); The hoisting component (410) further includes: A second hoist (418) rotatably disposed on the mounting base (411); A second motor (419) connected to the second hoist (418); A second steel wire rope (417), wherein the first end of the second steel wire rope (417) is connected to the second winch (418), the second end of the second steel wire rope (417) is wound around the second fixed pulley (130), and the second winch (418) is used to control the second end of the second steel wire rope (417) to move in a vertical direction under the drive of the second motor (419).

6. The wind turbine blade replacement device according to claim 2, characterized in that: The driving assembly (400) comprises: a hoist (420), the hoist (420) being used to be fixed to the pitch bearing (20), the blade (30) or the ground; the second end of the first steel wire rope (300) is passed through the hoist (420), and the hoist (420) is used to control the movement of the first steel wire rope (300); A rope collecting component (430) is arranged on a path along which the first steel wire rope (300) passes at a side of a lower rope outlet of the hoist (420), and the rope collecting component (430) is used to collect and release the first steel wire rope (300).

7. The wind turbine blade replacement device according to any one of claims 1 to 6, characterized in that: The movable assembly (200) further comprises a plurality of hoop components (220), a plurality of pulley mounting components (230) and a plurality of cushion blocks (240), wherein the hoop components (220) and the pulley mounting components (230) are connected along a preset annular path to form a hoop structure, and the hoop structure is used to be sleeved on the root of the blade (30); The movable pulley (210) is arranged on the pulley mounting component (230), and the cushion block (240) is used to connect the hoop component (220) and the pulley mounting component (230); when two hoop components (220) are connected, the cushion block (240) is also used to connect the hoop component (220) and the adjacent hoop component (220); when two pulley mounting components (230) are connected, the cushion block (240) is also used to connect the pulley mounting component (230) and the adjacent pulley mounting component (230).

8. The device for replacing blades of a wind turbine generator according to claim 7, characterized in that: The active component (200) further comprises: A limiting plate (270) is provided on the hoop component (220); A first support rod (250) rotatably disposed on the limiting plate (270); The second support rod (260) is threadedly connected to the first support rod (250), and one end of the second support rod (260) away from the first support rod (250) is used to be connected to the end surface 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), wherein the third support rod (280) is connected to the arc-shaped positioning plate (290), a side of the third support rod (280) away from the arc-shaped positioning plate (290) is used to be connected to the pitch bearing (20), and a side of the arc-shaped positioning plate (290) away from the third support rod (280) is used to abut against the clamping hoop 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 used to be arranged at the tip of the blade (30); A tail slide fixing rope (500), one end of which is connected to the first slide root component (600), and the other end of which is connected to the movable component (200); The tail pull rope (700) is connected to the first tail member (600).

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

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