A blade hoisting and adjusting device for a wind turbine

Abstract

A blade hoisting and adjustment device for a wind turbine generator comprises two blade clamps, a tower support and a hanging beam; a hoist is provided above the tower support, and the hoist is connected to a fixed plate via a lifting rope; the hanging beam comprises a rotating frame, a bearing inner ring, a bearing outer ring and a fixed plate, a gear bar is provided on the inner side of the bearing inner ring, a drive motor is mounted on the fixed plate, and the drive end of the drive motor is meshed with the gear bar via a gear; winches are connected to both sides of the upper surface of the rotating frame, and the winches are connected to the blade clamps via a wire rope. The present invention overcomes the shortcomings of the prior art, and through the meshing relationship between the gear and the gear bar, the bearing inner ring is driven to rotate, and then the wind turbine blades are driven to rotate horizontally, so that the wind turbine blades can be placed parallel to the bottom of the tower before hoisting, thereby significantly shortening the length of the wind turbine tower support, reducing the load, reducing the structural materials, and at the same time reducing the working space to facilitate the wind turbine blade hoisting work.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade hoisting, and in particular to a blade hoisting and adjusting device for a wind turbine. Background Art

[0002] With the growing development of offshore wind power, the market demand for replacement and maintenance of major components of offshore wind turbines has also increased dramatically. Due to the distance from land, the difficulty of replacing major components has become a common problem faced by offshore wind power worldwide.

[0003] Large component replacements at sea are typically performed using outrigger crane vessels. According to research, in my country, the cost of renting an outrigger crane vessel for each major component replacement for offshore wind turbines is approximately 3 million RMB. Currently, the limited availability of outrigger vessels in China and their high operating costs have become a bottleneck in reducing costs for offshore wind turbine component replacement operations. Furthermore, due to the limited offshore working area, the placement and installation of longer wind turbine blades is also challenging. Summary of the Invention

[0004] To address the shortcomings of the prior art, the present invention provides a blade hoisting and adjustment device for a wind turbine. This device overcomes these shortcomings and features a rational design. Through the meshing relationship between a gear and a pinion, a drive motor drives the inner ring of the bearing corresponding to the pinion, thereby driving the rotating frame and the underlying wind turbine blades to rotate horizontally. This allows the wind turbine blades to be placed parallel to the tower before installation, significantly shortening the tower's top support, reducing loads and structural material requirements. It also reduces the operating space, facilitating offshore installation. The present invention is also applicable to onshore wind turbine blade installation.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A blade hoisting and adjustment device for a wind turbine, comprising two blade clamps, a tower top bracket and a hanging beam, wherein the two blade clamps are respectively fixedly mounted on both sides of the center of gravity of the wind turbine blade, and both sides of the blade clamps are fixedly mounted with hanging rings; the tower top bracket is fixedly mounted in the nacelle of the wind turbine, and both sides of the upper surface of the tower top bracket are movably connected to hoists, and the driving ends of the hoists are connected to one end of the pulling rope; the hanging beam comprises a rotating frame, a bearing inner ring, a bearing outer ring and a fixed plate, the rotating frame is fixedly mounted below the bearing inner ring, and the bearing inner ring Matching the outer ring of the bearing, the fixed plate is fixedly installed above the outer ring of the bearing, and the other end of the pulling rope is fixedly connected to the top of the fixed plate. A gear bar is provided on the inner surface of the inner ring of the bearing, and a driving motor is fixedly installed at an eccentric position on the upper surface of the fixed plate. The driving end of the driving motor passes through the fixed plate and is fixedly installed with a gear, and the gear is meshed with the gear bar; winches are movably connected to both sides of the upper surface of the rotating frame, and the driving ends of the winches are respectively connected to one end of the wire rope, and the other end of the wire rope is fixedly connected to the lifting rings on both sides of the blade clamp.

[0007] Preferably, movable guide rails are fixedly installed on both sides of the upper surface of the tower top bracket, a sliding block is slidably connected in each of the movable guide rails, a telescopic motor is fixedly installed at both ends of each of the movable guide rails, the telescopic end of each telescopic motor is fixedly connected to a sliding block respectively, and the hoist is fixedly installed above the sliding block.

[0008] Preferably, limit slide rails are provided on both sides of the upper surface of the rotating frame, and the limit slide rails include a first limit slide rail and a second limit slide rail, and the first limit slide rail and the second limit slide rail are respectively located on the left and right sides of the fixed plate, and strip grooves are provided below the inner surfaces of the first limit slide rail and the second limit slide rail, and the first limit slide rail and the second limit slide rail are slidingly connected to the limit slider, the winch is fixedly installed on the limit slider, and the wire rope passes through the strip grooves and is fixedly connected to the lifting rings on both sides of the blade clamp.

[0009] Preferably, a rubber pad is fixedly mounted on the inner surface of the blade clamp.

[0010] The present invention provides a blade hoisting and adjustment device for a wind turbine. The device has the following beneficial effects: through the meshing relationship between the gear and the gear bar, the inner ring of the bearing corresponding to the gear bar can be driven by a drive motor to rotate, thereby driving the rotating frame and the wind turbine blades below to rotate horizontally. The wind turbine blades can be placed parallel to the bottom of the tower before hoisting, which can significantly shorten the length of the wind turbine tower top support, reduce the load, reduce the structural materials, and also reduce the working space to facilitate offshore hoisting. The winch can then be controlled to release the wire rope away from the blade root or tighten the wire rope near the blade root, thereby driving the blade to rotate vertically and adjust to the appropriate installation angle. The entire process does not require large-scale hoisting equipment, greatly saving the cost of blade replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the prior art.

[0012] Figure 1 A schematic structural diagram of the present invention;

[0013] Figure 2 A schematic diagram of the structure of the blades after rotating in the horizontal direction in the present invention;

[0014] Figure 3 A schematic structural diagram of the tower top support in the present invention;

[0015] Figure 4 A schematic structural diagram of the hanging beam in the present invention;

[0016] Figure 5 A top view of the hanging beam of the present invention;

[0017] Figure 6 A schematic diagram of the structure of the inner ring of the bearing and the outer ring of the bearing in the present invention;

[0018] Description of the numbers in the figure:

[0019] 1. Blade clamp; 2. Tower top bracket; 3. Lifting beam; 4. Lifting ring; 5. Hoist; 6. Lifting rope; 7. Winch; 8. Wire rope; 9. Sliding block; 10. Telescopic motor; 11. Moving guide rail; 12. First limit slide rail; 13. Second limit slide rail; 14. Strip slot; 15. Limit slider; 31. Rotating frame; 32. Bearing inner ring; 33. Bearing outer ring; 34. Fixed plate; 35. Gear bar; 36. Drive motor; 37. Gear. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0021] Example 1, as Figure 1-6 As shown, a blade hoisting and adjusting device for a wind turbine comprises two blade clamps 1, a tower bracket 2 and a hanging beam 3. The two blade clamps 1 are fixedly mounted on both sides of the center of gravity of the wind turbine blade, and a hanging ring 4 is fixedly mounted on both sides of the surface of the blade clamp 1; the tower bracket 2 is fixedly mounted in the nacelle of the wind turbine, and hoists 5 are movably connected to both sides of the upper surface of the tower bracket 2, and the driving ends of the hoists 5 are connected to one end of a pulling rope 6; the hanging beam 3 comprises a rotating frame 31, a bearing inner ring 32, a bearing outer ring 33 and a fixed plate 34. The rotating frame 31 is fixedly mounted below the bearing inner ring 32, and the bearing inner ring 32 is connected to the shaft The bearing outer ring 33 is matched, the fixed plate 34 is fixedly installed above the bearing outer ring 33, the other end of the pulling rope 6 is fixedly connected to the top of the fixed plate 34, and a gear bar 35 is provided on the inner surface of the bearing inner ring 32. A drive motor 36 is fixedly installed at an eccentric position on the upper surface of the fixed plate 34. The driving end of the drive motor 36 passes through the fixed plate 34 and is fixedly installed with a gear 37, and the gear 37 is meshed with the gear bar 35; winches 7 are movably connected to both sides of the upper surface of the rotating frame 31, and the driving ends of the winches 7 are respectively connected to one end of the wire rope 8, and the other end of the wire rope 8 is fixedly connected to the lifting rings 4 on both sides of the blade clamp 1.

[0022] Working principle: When in use, the wind turbine blades can be placed horizontally under the tower, and then two blade clamps 1 can be fixed on the wind turbine blades, and the positions of the two blade clamps 1 can be distributed on both sides of the center of gravity of the wind turbine blades, and then the other ends of the wire rope 8 can be connected to the lifting rings 4 on both sides of the two blade clamps 1 respectively. During hoisting, first control the hoist 5 to pull the lifting rope 6 to lift the entire hanging beam 3 and the wind turbine blades to a certain height, and then control the driving motor 36 to drive the gear 37 to rotate. Through the meshing relationship between the gear 37 and the gear bar 35, the inner ring 32 of the bearing corresponding to the gear bar 35 is driven to rotate relative to the outer ring 33 of the bearing, and then the rotating frame 31 and the wind turbine blades below are driven to rotate horizontally to a suitable angle; then control the winch 7 to release the wire rope 8 away from the blade root or tighten the wire rope 8 close to the blade root to drive the blade to rotate vertically and adjust to a suitable installation angle, and then control the hoist 5 to pull the lifting rope 6 upward synchronously, and control the hoist 5 to move toward the nacelle to ensure that the wind turbine blades can be moved to the tower top installation position to complete the installation and tightening of the blade roots; after the installation is completed, loosen the blade clamp 1 and send it and the hanging beam 3 and other components to the ground through the hoist 5.

[0023] Embodiment 2, as a preferred solution of embodiment 1, movable guide rails 11 are fixedly installed on both sides of the upper surface of the tower top bracket 2, and a sliding block 9 is slidably connected in each movable guide rail 11. Telescopic motors 10 are fixedly installed at both ends of each movable guide rail 11, and the telescopic end of each telescopic motor 10 is respectively fixedly connected to a sliding block 9, and the hoist 5 is fixedly installed above the sliding block 9. In this embodiment, there are four hoists 5, and the driving end of each hoist 5 is connected to a pulling rope 6. The ends of the four pulling ropes 6 are respectively connected to the four corners of the fixed plate 34 to ensure the stability of the entire hanging beam 3. When controlling the hoist 5 to move toward the cabin, each telescopic motor 10 can be controlled to drive each sliding block 9 to slide in the movable guide rail 11 toward the cabin, so that the hoist 5 above each sliding block 9 moves toward the cabin.

[0024] Embodiment 3, as a preferred solution of embodiment 1, both sides of the upper surface of the rotating frame 31 are provided with limit rails, and the limit rails include a first limit rail 12 and a second limit rail 13. The first limit rail 12 and the second limit rail 13 are respectively located on the left and right sides of the fixed plate 34. A strip slot 14 is provided below the inner surface of the first limit rail 12 and the second limit rail 13. The first limit rail 12 and the second limit rail 13 are slidably connected to the limit slider 15. The winch 7 is fixedly mounted on the limit slider 15, and the wire rope 8 is fixedly connected to the lifting ring 4 on both sides of the blade clamp 1 through the strip slot 14. When the winch 7 releases the wire rope 8 away from the root of the blade or tightens the wire rope 8 close to the root of the blade, the winches 7 on both sides can slide in the first limit rail 12 or the second limit rail 13 through the action of the limit slider 15, so as to adaptively adjust the position of the winch 7 according to the rotation angle of the blade.

[0025] Embodiment 4, as a preferred solution of embodiment 1, a rubber pad is fixedly installed on the inner surface of the blade clamp 1. The rubber pad plays a certain protective role on the blade surface.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. 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 various embodiments of the present invention.

Claims

1. A blade hoisting and adjusting device for a wind turbine, characterized in that: The invention comprises two blade clamps (1), a tower top bracket (2) and a hanging beam (3), wherein the two blade clamps (1) are fixedly mounted on both sides of the center of gravity of the blade, and both sides of the blade clamp (1) are fixedly mounted with hanging rings (4); the tower top bracket (2) is fixedly mounted in the cabin of the wind turbine, and both sides of the upper surface of the tower top bracket (2) are movably connected to hoists (5), and the driving ends of the hoists (5) are connected to one end of a pulling rope (6); The hanging beam (3) includes a rotating frame (31), a bearing inner ring (32), a bearing outer ring (33) and a fixed plate (34), wherein the rotating frame (31) is fixedly mounted below the bearing inner ring (32), the bearing inner ring (32) matches the bearing outer ring (33), and the fixed plate (34) is fixedly mounted above the bearing outer ring (33). The other end of the pulling rope (6) is fixedly connected to the top of the fixed plate (34), and a gear bar (35) is provided on the inner surface of the bearing inner ring (32). A driving motor (36) is fixedly installed at an eccentric position on the upper surface of the fixed plate (34), and a gear (37) is fixedly installed on the driving end of the driving motor (36) through the fixed plate (34), and the gear (37) is meshed with the gear bar (35); winches (7) are movably connected to both sides of the upper surface of the rotating frame (31), and the driving ends of the winches (7) are respectively connected to one end of a steel wire rope (8), and the other end of the steel wire rope (8) is fixedly connected to the lifting rings (4) on both sides of the blade clamp (1); Both sides of the upper surface of the tower top bracket (2) are fixedly mounted with movable guide rails (11), a sliding block (9) is slidably connected in each movable guide rail (11), a telescopic motor (10) is fixedly mounted at both ends of each movable guide rail (11), and the telescopic end of each telescopic motor (10) is fixedly connected to a sliding block (9), and the hoist (5) is fixedly mounted above the sliding block (9); Limiting slide rails are provided on both sides of the upper surface of the rotating frame (31), and the limiting slide rails include a first limiting slide rail (12) and a second limiting slide rail (13). The first limiting slide rail (12) and the second limiting slide rail (13) are respectively located on the left and right sides of the fixed plate (34). A strip slot (14) is provided below the inner surface of the first limiting slide rail (12) and the second limiting slide rail (13). The first limiting slide rail (12) and the second limiting slide rail (13) are slidably connected to the limiting slider (15). The winch (7) is fixedly installed on the limiting slider (15), and the wire rope (8) passes through the strip slot (14) and is fixedly connected to the lifting rings (4) on both sides of the blade clamp (1).

2. The blade hoisting and adjusting device for a wind turbine according to claim 1, characterized in that: A rubber pad is fixedly mounted on the inner surface of the blade clamp (1).

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