A blade replacement hoisting system for a wind turbine

Abstract

The present invention relates to the technical field of wind turbine blade replacement, and particularly to a hoisting system for replacing blades of a wind turbine. The number of blade sling assemblies is two, which are respectively sleeved on two wind turbine blades; the hoisting fixing frame assembly is fixedly connected to the two blade sling assemblies through a plurality of fixing frame steel wires, and a plurality of electric hoists are installed on the hoisting fixing frame assembly, and hoist ropes are connected to the electric hoists; a plurality of basket motors are installed on the basket assembly, and the blade sling assemblies are respectively connected to the output shafts of the basket motors through a plurality of basket steel wires in one-to-one correspondence; the top of the blade hoisting frame is detachably connected to the hoisting fixing frame assembly through a plurality of hoisting frame ropes, and a plurality of hoisting frame lugs are arranged on both side walls of the blade hoisting frame from top to bottom. The beneficial effect of the present invention is that the present invention realizes the removal of old blades and the installation of new blades of a wind turbine without using a main crane or a hoisting ship, thereby saving the hoisting cost of blade replacement.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade replacement, and particularly to a blade hoisting system for replacing wind turbine blades. Background Art

[0002] At present, the replacement of onshore or offshore wind turbine blades is completed by a crane or a hoisting ship. It is necessary to rent a main crane or hoisting ship with sufficient tonnage and boom length. With the development of technology, the tower of wind turbines is getting higher and higher (currently up to 140 meters and even higher in the future), and the length and mass of the blades are getting larger and larger. The required tonnage of the crane or hoisting ship is getting larger, the boom length is getting longer, and the cost is getting more expensive. Therefore, it is becoming increasingly important to study the replacement of wind turbine blades without using a crane or a hoisting ship. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a blade hoisting system for replacing wind turbine blades, which can realize the hoisting of wind turbine blades without a main crane or hoisting ship during the process of replacing wind turbine blades.

[0004] The technical solution of the present invention for solving the above technical problem is as follows: A blade hoisting system for replacing wind turbine blades includes

[0005] Blade sling assemblies, the number of the blade sling assemblies is two, and they are used to be sleeved on two wind turbine blades respectively;

[0006] Hoisting fixing frame assemblies, the hoisting fixing frame assemblies are arranged vertically below the blade sling assemblies, the hoisting fixing frame assemblies are fixedly connected with the two blade sling assemblies through a plurality of fixing frame steel wires, a plurality of electric hoists are installed on the hoisting fixing frame assemblies, hoist ropes are connected to the electric hoists, and hooks are fixedly arranged at the ends of the hoist ropes far away from the electric hoists;

[0007] Basket assemblies, the basket assemblies are arranged vertically below the blade sling assemblies, a plurality of basket motors are installed on the basket assemblies, and the blade sling assemblies are connected to the output shafts of the basket motors in one-to-one correspondence through a plurality of basket steel wires;

[0008] Blade hoisting frames, the blade hoisting frames are arranged vertically below the hoisting fixing frame assemblies, the tops of the blade hoisting frames are detachably connected with the hoisting fixing frame assemblies through a plurality of hoisting frame ropes, connectors for fixedly connecting with wind turbine blades are arranged at the tops of the blade hoisting frames, and a plurality of hoisting frame lugs for connecting with the hooks are arranged on both side walls of the blade hoisting frames from top to bottom.

[0009] The beneficial effects of the present invention are as follows: The present invention enables the wind turbine to complete the removal of the old blade and the installation of the new blade without using a main crane or a lifting ship, thereby saving the lifting cost for blade replacement.

[0010] Based on the above technical solutions, the present invention can be further improved as follows.

[0011] Furthermore, the blade sling assembly includes a flat sling and a blade semi-circular support member. The two ends of the flat sling are detachably and fixedly connected to the two ends of the blade semi-circular support member by bolts. The annular structure formed after the connection of the flat sling and the blade semi-circular support member is used to sleeved on the wind turbine blade and abuts against the outside of the rain shield of the wind turbine blade. Both ends of the blade semi-circular support member are fixedly provided with sling connectors for connecting with the fixed frame wire rope and the hanging basket wire rope.

[0012] The beneficial effects of adopting the above further solution are as follows: The blade sling assembly is connected by a flat sling and a blade semi-circular support member, which facilitates the installation of the blade sling assembly. And when in a state of bearing gravity, the flat sling is located above as the main load-bearing member, avoiding damage to the wind turbine blade.

[0013] Furthermore, a rain shield support assembly is provided beside each blade sling assembly. The rain shield support assembly includes an upper arc-shaped support member for abutting against the inner side of the rain shield of the wind turbine blade and a lower arc-shaped support member for fixedly connecting with the wind turbine pitch bearing. The upper arc-shaped support member and the lower arc-shaped support member are fixedly connected by a support screw.

[0014] The beneficial effects of adopting the above further solution are as follows: The setting of the rain shield support assembly can support the rain shield, avoiding damage to the rain shield due to the blade sling assembly receiving a large acting force during the process of hoisting the wind turbine blade.

[0015] Furthermore, the hoisting and fixing frame assembly is of a frame structure. A plurality of electric hoists are fixed at the bottom of the hoisting and fixing frame assembly. A plurality of fixing frame lifting lugs corresponding to the fixed frame wire ropes one by one are fixedly provided at the upper part of the hoisting and fixing frame assembly. A fixing frame tower barrel abutting arc plate is fixedly provided on the side of the hoisting and fixing frame assembly close to the wind turbine tower barrel.

[0016] The beneficial effects of adopting the above further solution are as follows: The setting of the fixing frame lifting lugs facilitates the connection with the fixed frame wire ropes, and the fixing frame tower barrel abutting arc plate can support the hoisting and fixing frame assembly through the tower barrel.

[0017] Further, a fixing frame tower barrel sling is provided on one side of the hoisting fixing frame assembly close to the wind turbine tower barrel. Both ends of the fixing frame tower barrel sling are fixedly connected to one end of a fixing frame sling pulling screw rod. A fixing frame sling pulling fixing block for correspondingly connecting with the fixing frame sling pulling screw rod one by one is fixedly arranged on the hoisting fixing frame assembly. The end of the fixing frame sling pulling screw rod away from the fixing frame tower barrel sling passes through and extends out of the fixing frame sling pulling fixing block and is in threaded connection with a nut.

[0018] The beneficial effect of adopting the above further scheme is that during use, the fixing frame tower barrel sling is sleeved on the tower barrel, and the position of the fixing frame sling pulling screw rod is adjusted by rotating the nut to realize the adjustment of the tightness of the fixing frame tower barrel sling. When the fixing frame tower barrel sling is tightly sleeved on the tower barrel, the hoisting fixing frame assembly can be firmly abutted against the tower barrel, avoiding the shaking of the hoisting fixing frame assembly during the hoisting process of the wind turbine blade. When it is necessary to disassemble the hoisting fixing frame assembly, the connection between the fixing frame tower barrel sling and the tower barrel can be loosened.

[0019] Further, the hanging basket assembly includes a first bottom plate of the hanging basket. Both ends of the first bottom plate of the hanging basket are provided with second bottom plates of the hanging basket. The two second bottom plates of the hanging basket are located on the same side of the first bottom plate of the hanging basket, and one end of each of the two second bottom plates of the hanging basket is fixedly connected to the end of the first bottom plate of the hanging basket to form a C-shaped structure. Two hanging basket lifting frames are fixedly arranged on each of the second bottom plates of the hanging basket, and the hanging basket motor is fixedly arranged on the hanging basket lifting frame.

[0020] The beneficial effect of adopting the above further scheme is that the hanging basket assembly is in a C-shaped structure, and the hanging basket motor is installed on the hanging basket lifting frame. The lifting of the entire hanging basket assembly is realized by driving the hanging basket steel wire rope by the hanging basket motor.

[0021] Further, a hanging basket tower barrel abutting arc plate is fixedly arranged on one side of the first bottom plate of the hanging basket close to the wind turbine tower barrel.

[0022] The beneficial effect of adopting the above further scheme is that the setting of the hanging basket tower barrel abutting arc plate enables it to cooperate with the hanging basket tower barrel sling to fix the hanging basket assembly on the tower barrel. Further, hanging basket sling pulling fixing blocks are fixedly arranged at one end of each of the two second bottom plates of the hanging basket close to the wind turbine tower barrel. Hanging basket sling pulling screw rods are connected to the hanging basket sling pulling fixing blocks. One end of each of the two hanging basket sling pulling screw rods is fixedly connected to both ends of the hanging basket tower barrel sling respectively. The other end of each of the two hanging basket sling pulling screw rods passes through the hanging basket sling pulling fixing block and is in threaded connection with a nut.

[0023] The beneficial effects of adopting the above further solution are as follows: During use, the hanging basket tower barrel sling is sleeved on the tower barrel. By rotating the nut to adjust the position of the screw pulled by the hanging basket sling, the tightness of the hanging basket tower barrel sling can be adjusted. When the hanging basket tower barrel sling is tightly sleeved on the tower barrel, the hanging basket assembly can be firmly abutted against the tower barrel. When it is necessary to disassemble or move the hanging basket assembly up and down, the connection between the hanging basket tower barrel sling and the tower barrel can be loosened.

[0024] Further, the blade hoisting frame is a C-shaped frame structure with an open vertical side. A blade support fixing plate is fixedly provided on the side of the blade hoisting frame close to the wind turbine tower barrel. The top of the blade support fixing plate is rotatably connected to the blade hoisting frame. At least two blade support arc-shaped members that can slide in the vertical direction are slidably provided on the blade support fixing plate. The blade support arc-shaped members are arranged inside the blade hoisting frame. On the side of the blade support fixing plate close to the wind turbine tower barrel, vertical tension springs corresponding to the blade support arc-shaped members one by one are provided. One end of the tension spring far from the end of the blade support fixing plate is fixedly connected to the blade support fixing plate. The other end of the upper tension spring is fixedly connected to one end of a pull rope. The other end of the pull rope bypasses a winding ring provided at the end of the blade support fixing plate and is fixedly connected to the upper blade support arc-shaped member. The other end of the lower tension spring is fixedly connected to the lower blade support arc-shaped member.

[0025] The beneficial effects of adopting the above further solution are as follows: The blade support arc-shaped member is slidably arranged on the blade support fixing plate. During hoisting, the wind turbine blade abuts against the blade support arc-shaped member. Since the blade to be hoisted of the wind turbine slides downward during hoisting to ensure that all components come out of the hub, the slidably arranged blade support arc-shaped member can prevent the blade support arc-shaped member from sliding with the wind turbine blade and causing damage to the outer surface of the wind turbine blade. At the same time, the tension spring and the pull rope can make the blade support arc-shaped member be above the blade support fixing plate before movement, creating conditions for it to slide down with the blade. Further, an electric push rod is provided on the hanging basket assembly. One end of the electric push rod is rotatably connected to the hanging basket assembly. A push rod connecting pin for detachably connecting with the other end of the electric push rod by bolts is provided on the side of the blade support fixing plate close to the wind turbine tower barrel.

[0026] The beneficial effects of adopting the above further solution are as follows: Before the wind turbine blade is separated from the wind turbine pitch bearing, the wind turbine blade has a certain outward inclination. The electric push rod is pushed out to drive the blade support fixing plate to incline outward, so that the blade support arc-shaped member abuts against the wind turbine blade. After the wind turbine blade is separated from the wind turbine pitch bearing, the electric push rod retracts to make the wind turbine blade vertical. Description of the Drawings

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. The hanging basket tower barrel abutting arc plate, the hanging basket tower barrel sling, and the electric push rod are not drawn in the attached drawings;

[0028] Figure 2 This is a schematic diagram of the structure of the blade sling assembly in the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the hoisting fixing frame assembly in the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the hanging basket assembly in the present invention;

[0031] Figure 5 This is an installation schematic diagram of the tension spring on the blade support fixing plate in the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the rainproof ring support assembly in the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the electric push rod in the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of the guiding rod in the present invention;

[0035] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0036] 1. Blade sling assembly; 101. Flat sling; 102. Blade semi-circular support; 103. Sling connecting piece; 2. Hoisting fixing frame assembly; 201. Fixing frame lifting lug; 202. Fixing frame tower barrel abutting arc plate; 203. Fixing frame tower barrel sling; 204. Fixing frame sling pulling screw; 205. Fixing frame sling pulling fixed block; 3. Fixing frame steel wire rope; 4. Electric hoist; 5. Hoist lifting rope; 6. Hook; 7. Hanging basket assembly; 701. First bottom plate of the hanging basket; 702. Second bottom plate of the hanging basket; 703. Hanging basket lifting frame; 704. Hanging basket tower barrel abutting arc plate; 705. Hanging basket sling pulling fixed block; 706. Hanging basket sling pulling screw; 707. Hanging basket tower barrel sling; 8. Hanging basket motor; 9. Hanging basket steel wire rope; 10. Blade hoisting frame; 1001. Blade support fixing plate; 1002. Blade support arc piece; 1003. Tension spring; 1004. Pulling rope; 1005. Winding ring; 11. Hoisting frame lifting rope; 12. Connecting piece; 13. Hoisting frame lifting lug; 14. Rainproof ring support assembly; 1401. Upper arc support; 1402. Lower arc support; 1403. Support screw; 15. Electric push rod; 16. Push rod connecting pin; 17. Guiding rod. Detailed implementation manners

[0037] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0038] As Figure 1 shown, an embodiment of the present invention includes a blade sling assembly 1. The number of the blade sling assemblies 1 is two and is used to be sleeved on two wind turbine blades respectively.

[0039] A hoisting fixing frame assembly 2 is arranged vertically below the blade sling assembly 1. The hoisting fixing frame assembly 2 is fixedly connected to the two blade sling assemblies 1 through a plurality of fixing frame steel wires 3. A plurality of electric hoists 4 are installed on the hoisting fixing frame assembly 2. A hoist sling 5 is connected to the electric hoist 4. A hook 6 is fixedly arranged at one end of the hoist sling 5 away from the electric hoist 4;

[0040] A hanging basket assembly 7 is arranged vertically below the blade sling assembly 1. A plurality of hanging basket motors 8 are installed on the hanging basket assembly 7. The blade sling assembly 1 is connected to the output shafts of the hanging basket motors 8 in one-to-one correspondence through a plurality of hanging basket steel wires 9;

[0041] A blade hoisting frame 10 is arranged vertically below the hoisting fixing frame assembly 2. The top of the blade hoisting frame 10 is detachably connected to the hoisting fixing frame assembly 2 through a plurality of hoisting frame suspension ropes 11. A connecting member 12 for fixedly connecting to a wind turbine blade is arranged at the top of the blade hoisting frame 10. A plurality of hoisting frame lugs 13 for connecting to the hook 6 are arranged on both side walls of the blade hoisting frame 10 from top to bottom.

[0042] Specifically, as Figure 2As shown, in an embodiment of the present invention, the blade sling assembly 1 includes a flat sling 101 and a blade semi-circular support member 102. The two ends of the flat sling 101 and the two ends of the blade semi-circular support member 102 are detachably and fixedly connected by bolts. Specifically, connection rings are fixedly provided at the two ends of the flat sling 101, and connecting rods are sleeved inside the connection rings. The two ends of the connecting rods are respectively fixedly connected to the ends of the blade semi-circular support member 102 by bolts. The bolts are fixedly connected to the ends of the blade semi-circular support member 102. The threaded rod ends of the bolts pass through the connecting rods and are threadedly connected to nuts, thereby realizing the detachable and fixed connection between the flat sling 101 and the blade semi-circular support member 102. The annular structure formed after the flat sling 101 and the blade semi-circular support member 102 are connected is used to be sleeved on the wind turbine blade and abuts against the outside of the rain shield ring of the wind turbine blade. Hoop connectors 103 for connecting to the fixed frame wire rope 3 and the hanging basket wire rope 9 are fixedly provided at both ends of the blade semi-circular support member 102. The hoop connectors 103 are fixed to the blade semi-circular support member 102 by bolts. The blade sling assembly 1 is connected by the flat sling 101 and the blade semi-circular support member 102, which facilitates the installation of the blade sling assembly 1. And when in a state of bearing gravity, the flat sling 101 is located above as the main load-bearing member, avoiding damage to the wind turbine blade. In the embodiment of the present invention, two hoop connectors 103 are provided at both ends of each blade semi-circular support member 102 for respectively connecting to the fixed frame wire rope 3 and the hanging basket wire rope 9. Two blade sling assemblies 1 then form four hoop connectors 103 for connecting to the fixed frame wire rope 3 and four hoop connectors 103 for connecting to the hanging basket wire rope 9.

[0043] In the embodiment of the present invention, a rain shield support assembly 14 is provided beside the blade sling assembly 1, as Figure 6 shown. The rain shield support assembly 14 includes an upper arc support member 1401 for abutting against the inner side of the rain shield of the wind turbine blade and a lower arc support member 1402 for fixedly connecting to the wind turbine pitch bearing. The upper arc support member 1401 and the lower arc support member 1402 are fixedly connected by a support screw 1403. The setting of the rain shield support assembly 14 can support the rain shield, avoiding damage to the rain shield due to the blade sling assembly 1 being subjected to a large acting force during the process of hoisting the wind turbine blade.

[0044] As Figure 3As shown, in an embodiment of the present invention, a fixing frame tower barrel sling 203 is provided on one side of the hoisting fixing frame assembly 2 close to the wind turbine tower barrel. Both ends of the fixing frame tower barrel sling 203 are fixedly connected to one end of a fixing frame sling pulling screw 204. A fixing frame sling pulling fixing block 205 for correspondingly connecting with the fixing frame sling pulling screw 204 one by one is fixedly provided on the hoisting fixing frame assembly 2. The end of the fixing frame sling pulling screw 204 away from the fixing frame tower barrel sling 203 passes through and extends out of the fixing frame sling pulling fixing block 205 and is threadedly connected to a nut. During use, the fixing frame tower barrel sling 203 is sleeved on the tower barrel, and the position of the fixing frame sling pulling screw 204 is adjusted by rotating the nut to achieve the adjustment of the tightness of the fixing frame tower barrel sling 203. When the fixing frame tower barrel sling 203 is tightly sleeved on the tower barrel, the hoisting fixing frame assembly 2 can be tightly abutted against the tower barrel, avoiding the hoisting fixing frame assembly 2 from shaking during the process of hoisting the wind turbine blade. When it is necessary to disassemble the hoisting fixing frame assembly 2, the connection between the fixing frame tower barrel sling 203 and the tower barrel can be loosened.

[0045] The hoisting fixing frame assembly 2 is of a frame structure. A plurality of electric hoists 4 are fixed to the bottom of the hoisting fixing frame assembly 2. A plurality of fixing frame lifting lugs 201 corresponding to and connected with the fixing frame steel wire ropes 3 one by one are fixedly provided on the upper part of the hoisting fixing frame assembly 2. A fixing frame tower barrel abutting arc plate 202 is fixedly provided on one side of the hoisting fixing frame assembly 2 close to the wind turbine tower barrel. The setting of the fixing frame lifting lugs 201 facilitates the connection with the fixing frame steel wire ropes 3, and the fixing frame tower barrel abutting arc plate 202 can support the hoisting fixing frame assembly 2 through the tower barrel.

[0046] As Figure 4 As shown, the hanging basket assembly 7 includes a hanging basket first bottom plate 701. Both ends of the hanging basket first bottom plate 701 are provided with hanging basket second bottom plates 702. The two hanging basket second bottom plates 702 are located on the same side of the hanging basket first bottom plate 701, and one end of each of the two hanging basket second bottom plates 702 is fixedly connected to the end of the hanging basket first bottom plate 701 to form a C-shaped structure. Two hanging basket lifting frames 703 are fixedly provided on each of the hanging basket second bottom plates 702. The hanging basket motor 8 is fixedly provided on the hanging basket lifting frame 703. The hanging basket assembly 7 is of a C-shaped structure. The hanging basket motor 8 is installed on the hanging basket lifting frame 703, and the entire hanging basket assembly 7 is lifted and lowered by driving the hanging basket steel wire rope 9 through the hanging basket motor 8.

[0047] Preferably, a hanging basket tower barrel abutting arc plate 704 is fixedly arranged on one side of the first bottom plate 701 of the hanging basket close to the wind turbine tower barrel. The arrangement of the hanging basket tower barrel abutting arc plate 704 enables it to closely abut against the tower barrel, providing support for the rotation of the blade support fixing plate 1001 and the change of the state of the wind turbine blade. In the embodiment of the present invention, hanging basket sling pulling fixing blocks 705 are fixedly arranged at one ends of the two second bottom plates 702 of the hanging basket close to the wind turbine tower barrel. Hanging basket sling pulling screw rods 706 are connected to the hanging basket sling pulling fixing blocks 705. One ends of the two hanging basket sling pulling screw rods 706 are respectively fixedly connected to two ends of a hanging basket tower barrel sling 707. The other ends of the two hanging basket sling pulling screw rods 706 pass through the hanging basket sling pulling fixing blocks 705 and are threadedly connected with nuts. During use, the hanging basket tower barrel sling 707 is sleeved on the tower barrel. By rotating the nuts to adjust the positions of the hanging basket sling pulling screw rods 706, the tightness of the hanging basket tower barrel sling 707 can be adjusted. When the hanging basket tower barrel sling 707 is tightly sleeved on the tower barrel, the hanging basket assembly 7 can tightly abut against the tower barrel, providing support for the rotation of the blade support fixing plate 1001 and the change of the state of the wind turbine blade. When it is necessary to disassemble or move the hanging basket assembly 7 up and down, the connection between the hanging basket tower barrel sling 707 and the tower barrel can be loosened.

[0048] Such as Figure 1 , Figure 5As shown, the blade hoisting frame 10 is a C-shaped frame structure with an open vertical side. A blade support fixing plate 1001 is fixedly provided on the side of the blade hoisting frame 10 close to the wind turbine tower barrel. The top of the blade support fixing plate 1001 is rotatably connected to the blade hoisting frame 10. At least two blade support arc-shaped members 1002 that can slide in the vertical direction are slidably provided on the blade support fixing plate 1001. The blade support arc-shaped members 1002 are arranged inside the blade hoisting frame 10. On the side of the blade support fixing plate 1001 close to the wind turbine tower barrel, vertically arranged tension springs 1003 corresponding to the blade support arc-shaped members 1002 one by one are provided. One end of the tension spring 1003 far from the end of the blade support fixing plate 1001 is fixedly connected to the blade support fixing plate 1001. The other end of the tension spring 1003 is fixedly connected to one end of a pull rope 1004. The other end of the tension spring 1003 located above is fixedly connected to one end of the pull rope 1004. The other end of the pull rope 1004 bypasses a winding ring 1005 provided at the end of the blade support fixing plate 1001 and is fixedly connected to the blade support arc-shaped member 1002 located above. The other end of the tension spring 1003 located below is fixedly connected to the blade support arc-shaped member 1002 located below. The blade support arc-shaped member 1002 is slidably arranged on the blade support fixing plate 1001. During the hoisting process, the wind turbine blade abuts against the blade support arc-shaped member 1002. During the process of the wind turbine blade separating from the wind turbine pitch bearing and sliding out of the hub, the slidably arranged blade support arc-shaped member 1002 can prevent the blade support arc-shaped member 1002 from sliding with the wind turbine blade and causing damage to the outer surface of the wind turbine blade. Further preferably, an electric push rod 15 is provided on the hanging basket assembly 7. The structure of the electric push rod 15 is as Figure 7 shown. One end of the electric push rod 15 is rotatably connected to the hanging basket assembly 7. A push rod connecting pin 16 for detachably connecting with the other end of the electric push rod 15 by bolts is provided on the side of the blade support fixing plate 1001 close to the wind turbine tower barrel. Before the wind turbine blade detaches from the wind turbine pitch bearing, the wind turbine blade has a certain outward inclination. The electric push rod 15 is pushed out to drive the blade support fixing plate 1001, so that the blade support arc-shaped member 1002 abuts against the wind turbine blade. After the wind turbine blade detaches from the wind turbine pitch bearing and slides out of the hub, the electric push rod 15 retracts, making the wind turbine blade vertical, and the upper part of the wind turbine blade is fixedly connected to the blade hoisting frame 10 with a connecting member 12.

[0049] Working principle: The blade sling assembly 1 composed of the flat sling 101 and the blade semi-circular support 102 is sleeved on two wind turbine blades that are not replaced. The sling connecting piece 103 is installed on the blade semi-circular support 102. The specific method is as follows: Before hoisting, the wind turbine blade to be disassembled is rotated to face downward, and the two blade sling assemblies 1 are sleeved on the other two wind turbine blades. The method of sleeving the two blade sling assemblies 1 on the other two wind turbine blades is as follows: Rotate the trailing edge of the blade where the blade sling assembly 1 is to be installed to the front, and use transparent tape to stick the double-eye traction sling on the upper semi-circle of the blade; Rotate the blade, and at a convenient installation position, connect and tighten the flat sling 101 and the double-eye traction sling through the sling pull rod, the traction sling tightening rod, and the nut; Ensure that the flat sling 101 is on the upper semi-circle of the blade when the blade edge (trailing edge) rotates to the rear; Rotate the blade, and at a convenient installation position, untie one end of the flat sling 101, connect it to the first section of the blade semi-circular support 102 through the sling pull rod and the nut, and at the same time hold the double-eye traction sling. Continue to rotate the blade, and at a convenient installation position, connect the first section and the second section of the blade semi-circular support 102 through bolts and nuts, and at the same time hold the traction sling. Continue to rotate the blade, and at a convenient installation position, remove the double-eye traction sling to complete the connection between the flat sling 101 and the blade semi-circular support 102;

[0050] Connect one end of the fixed-frame steel wire rope 3 and the hanging-basket steel wire rope 9 to the corresponding sling connecting piece 103 respectively;

[0051] Install the rain-proof ring support assembly 14, install the lower arc support 1402 on the installation bolt of the wind turbine pitch bearing, and adjust the nut so that the upper arc support 1401 abuts against the wind turbine protection ring;

[0052] Insert the hanging-basket steel wire rope 9 into the hanging-basket motor 8 one by one, and sleeve the hanging-basket tower-barrel sling 707 on the tower barrel;

[0053] The hoisting fixed frame assembly 2 is installed on the hanging basket assembly 7, and the fixed frame tower sling 203 is sleeved on the tower. The two ends of the fixed frame tower sling 203 are connected to the fixed frame sling pulling fixing block 205 on the hoisting fixed frame assembly 2 through the fixed frame sling pulling screw 204, and then the hoisting fixed frame assembly 2 is lifted to a certain height through the hanging basket assembly 7, and then the blade hanging frame 10 is directly installed on the hoisting fixed frame assembly 2 (specifically, the four corners of the blade hanging frame 10 are provided with a first connecting structure for connecting with the hoisting fixed frame assembly 2, and the first connecting structure is detachably connected to the top four corners of the blade hanging frame 10 and the hoisting fixed frame assembly 2 through bolts), and the blade support fixing plate 1001 is installed on the blade hanging frame 10, and then the hoisting fixed frame is installed through the hanging basket assembly 7. The fixed frame assembly 2 and the blade hoisting frame 10 are lifted to the corresponding height, and the lifting and fixing frame assembly 2 and the blade hoisting frame 10 are transported into place through one-time transportation of the hanging basket assembly 7, and then the fixed frame wire rope 3 is connected to the lifting and fixing frame assembly 2, and the fixed frame tower hoisting belt 203 is moved toward the tower by adjusting the fixed frame hoisting belt pulling screw 204, and the inclined fixed frame tower hoisting belt 203 is gradually horizontally sleeved on the tower during the movement. In this embodiment, in order to ensure that the inclined fixed frame tower hoisting belt 203 can be smoothly horizontal, guide rods 17 are provided on both sides of the fixed frame tower hoisting belt 203, and the two guide rods 17 are detachably arranged on the lifting and fixing frame assembly 2, and their length direction is the same as the length direction of the fixed frame hoisting belt pulling screw 204, such as Figure 8 As shown, a straightening frame is fixedly provided on one end of the guide rod 17 facing the tower, the main body of the guide rod 17 can be spliced ​​and connected by bolts, and the end of the fixed frame tower suspension belt 203 passes through the straightening frame and is connected to the fixed frame suspension belt pulling screw 204. When the fixed frame tower suspension belt 203 is horizontal, the guide rod 17 can be retracted and the redundant guide rods 17 can be removed;

[0054] The hanging basket assembly 7 is lowered to the position corresponding to the push rod connecting pin 16, the electric push rod 15 is connected to the push rod connecting pin 16, the hanging basket tower sling 707 which is tiltedly sleeved on the tower is fastened and sleeved on the tower, and in the process of fastening the hanging basket tower sling 707, the tilted hanging basket tower sling 707 is gradually sleeved horizontally on the tower. In this embodiment, in order to ensure that the tilted hanging basket tower sling 707 can be smoothly horizontal, the hanging basket tower sling 707 is provided with a guide rod 17, and the two guide rods 17 are fixedly provided on the hanging basket assembly 7, and the length direction thereof is the same as the length direction of the hanging basket sling pulling screw 706. A straightening frame is fixedly provided on one end of the guide rod 17 facing the tower, and the end of the hanging basket tower sling 707 passes through the straightening frame and is connected to the hanging basket sling pulling screw 706.

[0055] The electric push rod 15 extends, pushing the lower part of the blade support fixing plate 1001 to rotate obliquely upward, so that the blade to be disassembled abuts against the two blade support arc-shaped members 1002;

[0056] Loosen the connection bolts between the wind turbine blade and the wind turbine pitch bearing, extend the lifting rope of the separation system, and the wind turbine blade slides down. When the wind turbine blade is separated from the wind turbine pitch bearing and slides out of the hub, the electric push rod 15 retracts, the blade support fixing plate 1001 rotates to the vertical, and the blade rotates to the vertical under the action of gravity following the blade support fixing plate 1001;

[0057] The staff on the hanging basket assembly 7 removes the electric push rod 15, relaxes the hanging basket tower barrel sling 707 again, the hanging basket assembly 7 rises, connects the blade to the blade lifting frame 10 with the connecting piece 12, and then the hanging basket assembly 7 moves to each blade support arc-shaped member 1002 respectively, moves the blade support arc-shaped member 1002 to the corresponding lifting point of the blade, loosens the cover plate screws of the blade support arc-shaped member 1002, pads a film under the cover plate, and tightens the screws to ensure that the blade support arc-shaped member 1002 is fixed at the blade lifting point;

[0058] Then the hanging basket assembly 7 descends to the ground, cancels the hanging basket tower barrel sling 707, cancels the hanging basket tower barrel abutting arc plate 704, cancels the guiding rod 17 of the hanging basket tower barrel sling 707, places four electric hoists 4, places the connecting frames of the lifting and fixing frame assembly 2 and the connecting frame of the blade lifting frame 10, and the hanging basket assembly 7 rises again to transport the relevant components to the relevant positions for installation.

[0059] Since the blade is inclined before disassembly, for the convenience of the blade being vertical, the lifting and fixing frame assembly 2 and the blade lifting frame 10 are of a C-shaped frame structure, so that there are only three directions at the top of the blade lifting frame 10 where the blade can be connected with the connecting piece 12. In order to further ensure the stability of the connection between the blade lifting frame 10 and the blade and ensure the strength of the lifting and fixing frame assembly 2, after installing the four electric hoists 4 on the lifting and fixing frame assembly 2, two connecting frames are transported to the tops of the blade lifting frame 10 and the lifting and fixing frame assembly 2 through the hanging basket assembly 7, one for closing the opening of the C-shaped structure of the blade lifting frame 10, and one for closing the opening of the C-shaped structure of the lifting and fixing frame assembly 2. The two connecting frames are fixedly connected to the blade lifting frame 10 and the lifting and fixing frame assembly 2 respectively, and the connecting piece 12 is installed on the connecting frame arranged on the blade lifting frame 10. In this way, when the blade is connected to the blade lifting frame 10, the blade can be connected in four directions;

[0060] The hanging basket assembly 7 rises again to the lifting and fixing frame assembly 2, and connects the top of the blade to the top of the blade lifting frame 10 with the connecting piece 12 (remove the original blade bolt, connect the blade T-nut with the tooling bolt, or use the blade pin);

[0061] Remove all the connecting components connecting the blade lifting frame 10 and the lifting and fixing frame assembly 2. The blade lifting frame 10 is separated from the lifting and fixing frame assembly 2. The separation system continues to lengthen the rope, and the gravity of the wind turbine blade is transferred to the electric hoist 4. Remove the connecting rope between the separation system and the blade to achieve the complete separation of the wind turbine blade and the pitch bearing of the wind turbine. The electric hoist 4 lengthens the hoist rope 5, causing the wind turbine blade and the blade lifting frame 10 to descend and completely disengaging from the lifting and fixing frame assembly 2 in terms of height. With the cooperation of the electric hoist 4, hang the ends of the four lifting frame ropes 11 away from the lifting and fixing frame assembly 2 on the lifting frame lugs 13 on the second layer. The electric hoist 4 lengthens the hoist rope 5, and the gravity of the wind turbine blade and the blade lifting frame 10 gradually moves to the lifting frame ropes 11. Since the four lifting frame ropes 11 are closer to the tower barrel relative to the four electric hoists 4, during the process of the gravity of the wind turbine blade and the blade lifting frame 10 moving to the lifting frame ropes 11, the wind turbine blade and the blade lifting frame 10 gradually move backward. The hanging basket assembly 7 returns to the lifting and fixing frame assembly 2. The electric hoist 4 lengthens the hoist rope 5 to ensure that it is no longer stressed. Move the electric hoist 4 backward on the lifting and fixing frame assembly 2 so that the position of the electric hoist 4 is directly above each lifting frame lug 13. Then the electric hoist 4 retracts the hoist rope 5 and lifts the blade lifting frame 10 again. The lifting frame ropes 11 are no longer stressed. Remove the connection between the lifting frame ropes 11 and the blade lifting frame 10. At this time, the center of the wind turbine blade moves to the center of the four lifting points.

[0062] The electric hoist 4 lengthens the hoist rope 5, and the blade lifting frame 10 descends near the other end of the lifting frame rope 11. The hanging basket assembly 7 descends to this position. Install blade rotating lugs at the four corners of the blade lifting frame 10 (the original installation location of the first connection structure). Move the other ends of the four lifting frame ropes 11 clockwise or counterclockwise by one position and hook them into the blade rotating lugs. At this time, the four lifting frame ropes 11 are arranged in a clockwise or counterclockwise inclined manner. At this time, these four lifting frame ropes 11 form a torsion body. The electric hoist 4 continues to lengthen the hoist rope 5, and the four lifting frame ropes 11 are stressed and twisted. The blade lifting frame 10 will twist 90° with the vertical direction as the axis under the action of the four steel ropes, causing the cutting edge of the wind turbine blade to rotate 90° to the left or right, so that the cutting edge of the wind turbine blade is set to the left or right. To ensure that the lifting frame ropes 11 and the blade do not interfere with the hanging basket assembly 7 during the blade twisting process, the hanging basket assembly 7 can start twisting after descending to the ground. To ensure that the hanging basket assembly 7 can pass through the widest part of the blade after the blade is twisted, the first bottom plate 701 of the hanging basket can be lengthened on the ground and then the hanging basket can be raised to complete the remaining work;

[0063] Due to the rotation of the blade hoisting frame 10, the four hoist ropes 5 of the hoists are twisted. The hooks 6 at the bottom ends of the four hoist ropes 5 of the hoists are removed from the four hoisting frame lugs 13 at the uppermost part of the blade hoisting frame 10. Then, the hooks 6 of the hoist ropes 5 of the two electric hoists 4 on the left are hooked onto the two hoisting frame lugs 13 at the third layer on the left side of the blade hoisting frame 10, and the hooks 6 of the hoist ropes 5 of the two electric hoists 4 on the right are hooked onto the two hoisting frame lugs 13 at the second layer on the right side of the blade hoisting frame 10 (the horizontal height of the two hoisting frame lugs 13 at the third layer is lower than the horizontal height of the two hoisting frame lugs 13 at the second layer, and the center of gravity of the blade is between these two layers of lugs).

[0064] Then, for the four electric hoists 4, the four hoisting frame ropes 11 are no longer under force. Then, the hanging basket assembly 7 is moved, and the hoisting frame ropes 11 are removed from the blade rotating lugs.

[0065] Keep the two electric hoists 4 on the left stationary, and let out the hoist ropes 5 of the two electric hoists 4 on the right to rotate the wind turbine blade until the wind turbine blade rotates to the horizontal position.

[0066] Then, the four electric hoists 4 continue to let out the ropes simultaneously to lower the wind turbine blade until it is placed on the ground, completing the disassembly of the blade. The process of installing a new blade is the opposite of this, and thus the blade replacement is completed.

[0067] The present invention enables the wind turbine to complete the removal of the old blade and the installation of the new blade without using a main crane or a hoisting ship, thereby saving the hoisting cost for blade replacement.

[0068] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0069] In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0070] In the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does 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, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0072] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blade replacement hoisting system for a wind turbine, characterized in that including blade sling assemblies (1), the number of the blade sling assemblies (1) being two, which are respectively sleeved on two wind turbine blades; a hoisting fixing frame assembly (2), the hoisting fixing frame assembly (2) being arranged vertically below the blade sling assemblies (1), the hoisting fixing frame assembly (2) being fixedly connected to the two blade sling assemblies (1) through a plurality of fixing frame steel wires (3), a plurality of electric hoists (4) being installed on the hoisting fixing frame assembly (2), a hoist sling (5) being connected to the electric hoist (4), and a hook (6) being fixedly arranged at one end of the hoist sling (5) away from the electric hoist (4); a hanging basket assembly (7), the hanging basket assembly (7) being arranged vertically below the blade sling assemblies (1), a plurality of hanging basket motors (8) being installed on the hanging basket assembly (7), and the blade sling assemblies (1) being connected to output shafts of the hanging basket motors (8) in one-to-one correspondence through a plurality of hanging basket steel wires (9); a blade hoisting frame (10), the blade hoisting frame (10) being arranged vertically below the hoisting fixing frame assembly (2), the top of the blade hoisting frame (10) being detachably connected to the hoisting fixing frame assembly (2) through a plurality of hoisting frame slings (11), a connecting member (12) for fixedly connecting to a wind turbine blade being arranged at the top of the blade hoisting frame (10), and a plurality of hoisting frame lugs (13) for connecting to the hook (6) being arranged on both side walls of the blade hoisting frame (10) from top to bottom; the hoisting fixing frame assembly (2) is of a frame structure, a plurality of the electric hoists (4) being fixed to the bottom of the hoisting fixing frame assembly (2), a plurality of fixing frame lugs (201) respectively corresponding to and connected to the fixing frame steel wires (3) being fixedly arranged on the upper part of the hoisting fixing frame assembly (2), and a fixing frame tower barrel abutting arc plate (202) being fixedly arranged on one side of the hoisting fixing frame assembly (2) close to a wind turbine tower barrel; the hanging basket assembly (7) includes a hanging basket first bottom plate (701), both ends of the hanging basket first bottom plate (701) being provided with hanging basket second bottom plates (702), the two hanging basket second bottom plates (702) being located on the same side of the hanging basket first bottom plate (701), and one ends of the two hanging basket second bottom plates (702) being respectively fixedly connected to the ends of the hanging basket first bottom plate (701) to form a C-shaped structure, two hanging basket lifting frames (703) being fixedly arranged on each of the hanging basket second bottom plates (702), and the hanging basket motors (8) being fixedly arranged on the hanging basket lifting frames (703).

2. The blade replacement hoisting system for a wind turbine according to claim 1, characterized in that The blade sling assembly (1) includes a flat sling (101) and a blade semi-circular support (102). Both ends of the flat sling (101) are detachably and fixedly connected to both ends of the blade semi-circular support (102) by bolts. The annular structure formed after the connection of the flat sling (101) and the blade semi-circular support (102) is used to be sleeved on the wind turbine blade and abuts against the outside of the rain shield ring of the wind turbine blade. Ring connectors (103) for connecting with the fixed frame steel wire rope (3) and the hanging basket steel wire rope (9) are fixedly provided at both ends of the blade semi-circular support (102).

3. The blade replacement hoisting system for a wind turbine according to claim 1, characterized in that A rain shield ring support assembly (14) is provided beside the blade sling assembly (1). The rain shield ring support assembly (14) includes an upper arc-shaped support (1401) for abutting against the inner side of the rain shield ring of the wind turbine blade and a lower arc-shaped support (1402) for fixedly connecting with the wind turbine pitch bearing. The upper arc-shaped support (1401) and the lower arc-shaped support (1402) are fixedly connected by a support screw (1403).

4. The blade replacement hoisting system for a wind turbine according to claim 1, characterized in that On the side of the hoisting fixed frame assembly (2) close to the wind turbine tower barrel, a fixed frame tower barrel sling (203) is provided. Both ends of the fixed frame tower barrel sling (203) are fixedly connected to one end of a fixed frame sling pulling screw (204). Fixed frame sling pulling fixing blocks (205) for corresponding connection with the fixed frame sling pulling screws (204) are fixedly provided on the hoisting fixed frame assembly (2). The end of the fixed frame sling pulling screw (204) far from the fixed frame tower barrel sling (203) passes through and extends out of the fixed frame sling pulling fixing block (205) and is threadedly connected with a nut.

5. The blade replacement hoisting system for a wind turbine according to claim 1, characterized in that On the side of the first bottom plate (701) of the hanging basket close to the wind turbine tower barrel, a hanging basket tower barrel abutting arc plate (704) is fixedly provided.

6. The blade replacement hoisting system for a wind turbine according to claim 1, characterized in that On the end of both of the two second bottom plates (702) of the hanging basket close to the wind turbine tower barrel, hanging basket sling pulling fixing blocks (705) are fixedly provided. Hanging basket sling pulling screws (706) are connected to the hanging basket sling pulling fixing blocks (705). One end of each of the two hanging basket sling pulling screws (706) is fixedly connected to both ends of a hanging basket tower barrel sling (707). The other end of each of the two hanging basket sling pulling screws (706) passes through the hanging basket sling pulling fixing block (705) and is threadedly connected with a nut.

7. The blade replacement hoisting system for a wind turbine according to any one of claims 1 to 6, characterized in that The blade lifting frame (10) is a C-shaped frame structure with an open vertical side. A blade support fixing plate (1001) is fixedly provided on the side of the blade lifting frame (10) close to the wind turbine tower barrel. The top of the blade support fixing plate (1001) is rotatably connected to the blade lifting frame (10). Two blade support arc-shaped members (1002) that can slide vertically are slidably provided on the blade support fixing plate (1001). The blade support arc-shaped members (1002) are arranged inside the blade lifting frame (10). Vertical tension springs (1003) corresponding to the blade support arc-shaped members (1002) one by one are provided on the side of the blade support fixing plate (1001) close to the wind turbine tower barrel. One end of the tension spring (1003) far from the end of the blade support fixing plate (1001) is fixedly connected to the blade support fixing plate (1001). The other end of the upper tension spring (1003) is fixedly connected to one end of a pull rope (1004). The other end of the pull rope (1004) bypasses a winding ring (1005) provided at the end of the blade support fixing plate (1001) and is fixedly connected to the upper blade support arc-shaped member (1002). The other end of the lower tension spring (1003) is fixedly connected to the lower blade support arc-shaped member (1002).

8. The blade replacement hoisting system for a wind turbine according to claim 7, characterized in that An electric push rod (15) is provided on the hanging basket assembly (7). One end of the electric push rod (15) is rotatably connected to the hanging basket assembly (7). A push rod connecting pin (16) for detachably connecting to the other end of the electric push rod (15) by bolts is provided on the side of the blade support fixing plate (1001) close to the wind turbine tower barrel.

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