A blade adjustment and hoisting device for a wind turbine

Abstract

A blade adjustment and hoisting device for a wind turbine generator comprises two blade clamps and a tower support. The two blade clamps are connected by a fixed rod. An outer gear disc is movably connected to the fixed rod. An inner gear ring is provided along the edge of the outer surface of the outer gear disc. An outer gear is provided on the outer gear disc offset from the axis. The outer gear ring of the outer gear meshes with the inner gear ring of the outer gear disc. The central axis of the outer gear is transmission-connected to the driving end of a rotating motor. The rotating motor is mounted on the fixed rod via a mounting bracket. A movable guide rail is installed on the upper surface of the tower support. A sliding block is slidably connected to the movable guide rail. A telescopic motor is fixedly installed at the end of the movable guide rail. The telescopic end of the telescopic motor is fixedly connected to a sliding block. A hoist is fixedly installed on the sliding block. The driving end of the hoist is connected to the outer gear disc via a wire rope. The present invention overcomes the shortcomings of the prior art. The entire process does not require large-scale hoisting equipment, which greatly saves the cost of blade replacement.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade hoisting, and in particular to a blade adjusting and hoisting 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 offshore component replacements 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 shortage of outrigger vessels in China and the high cost of operating them have become a bottleneck in reducing the cost of offshore wind turbine component replacement operations. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention provides a blade adjustment and hoisting device for wind turbines. This device overcomes these shortcomings and features a rational design. The entire process eliminates the need for large-scale hoisting equipment, significantly reducing blade replacement costs. Furthermore, the present invention is also suitable for hoisting blades for onshore wind turbines.

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

[0006] A blade adjustment and hoisting device for a wind turbine, comprising two blade clamps and a tower top bracket, wherein the two blade clamps are fixedly mounted on both sides of the center of gravity of the wind turbine blade, and the two side surfaces of the two blade clamps are connected by a fixing rod, and the fixing rod is arranged parallel to the axis of the blade, and the fixing rod is movably connected to an outer gear plate through a rotating shaft, and an inner gear ring is arranged along the edge of the outer surface of the outer gear plate, and an outer gear is arranged on the outer gear plate offset from the axis, and the outer gear ring of the outer gear is meshed with the inner gear ring of the outer gear plate, and the central axis of the outer gear is connected to the rotating shaft of the wind turbine. The driving end of the machine is connected to the transmission, the rotating motor is fixedly mounted on one end of the mounting frame, and the other end of the mounting frame is fixedly mounted on the fixed rod; the tower top bracket is fixedly mounted in the nacelle of the wind turbine, and a movable guide rail is fixedly mounted on the upper surface of the tower top bracket, a sliding block is slidably connected in the movable guide rail, a telescopic motor is fixedly mounted on the end of the movable guide rail, the telescopic end of the telescopic motor is fixedly connected to a sliding block, a hoist is fixedly mounted on the sliding block, the driving end of the hoist is connected to one end of a steel wire rope, and the other end of the steel wire rope is fixedly connected to the outer gear disk.

[0007] Preferably, the axis center position of the outer gear plate coincides with the center of gravity of the fan blade.

[0008] Preferably, a lifting ring is fixedly connected to the outer surface of the outer gear plate, and the other end of the steel wire rope is fixedly connected to the lifting ring.

[0009] Preferably, there are four hoists, which are evenly distributed on the movable guide rails on both sides of the upper surface of the tower top bracket. The driving end of each hoist is connected to a steel wire rope. The four steel wire ropes are respectively connected to the outer gear plates on both sides of the blade, and each outer gear plate is fixedly connected to two steel wire ropes.

[0010] The present invention provides a blade adjustment and hoisting device for a wind turbine. The device has the following beneficial effects: the outer gear ring of the external gear meshes with the inner gear ring of the external gear plate, thereby driving the external gear plate to rotate. Since the external gear plate is pulled by a wire rope, the external gear plate does not rotate absolutely. Therefore, the rotation of the external gear along the edge of the external gear plate drives the entire blade to rotate around the axis of the external gear plate, thereby achieving the effect of adjusting the blade installation angle. The wire rope is synchronously lifted upward by a hoist, and the telescopic motor is controlled to drive the sliding block to slide within the movable guide rail, so that the hoist moves toward the nacelle, thereby controlling the wind turbine blade to move to the tower top installation position, thereby completing the installation and fastening of the blade root. 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 structural diagram of the tower top support in the present invention;

[0014] Figure 3 A schematic diagram of the structure of the components installed on the blade in the present invention;

[0015] Figure 4 A schematic structural diagram of a tower top support according to a fourth embodiment of the present invention;

[0016] Description of the numbers in the figure:

[0017] 1. Blade clamp; 2. Tower top bracket; 3. Fixing rod; 4. Rotating shaft; 5. External gear plate; 6. Internal gear ring; 7. External gear; 8. Rotating motor; 9. Mounting frame; 10. Moving guide rail; 11. Sliding block; 12. Telescopic motor; 13. Hoist; 14. Wire rope; 15. Lifting ring. DETAILED DESCRIPTION

[0018] 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.

[0019] Example 1, as Figure 1-3 As shown, a blade adjustment and hoisting device for a wind turbine comprises two blade clamps 1 and a tower top bracket 2. The two blade clamps 1 are fixedly mounted on both sides of the center of gravity of the wind turbine blade. The two side surfaces of the two blade clamps 1 are connected by a fixing rod 3. The fixing rod 3 is arranged parallel to the axis of the blade. The fixing rod 3 is movably connected to an outer gear plate 5 through a rotating shaft 4. An inner gear ring 6 is arranged along the edge of the outer surface of the outer gear plate 5. An outer gear 7 is arranged on the outer gear plate 5 off the axis. The outer gear ring of the outer gear 7 is meshed with the inner gear ring of the outer gear plate 5. The central axis of the outer gear 7 is connected to the driving force of the rotating motor 8. The moving end is connected through transmission, the rotating motor 8 is fixedly mounted on one end of the mounting frame 9, and the other end of the mounting frame 9 is fixedly mounted on the fixed rod 3; the tower top bracket 2 is fixedly mounted in the nacelle of the wind turbine, and a movable guide rail 10 is fixedly mounted on the upper surface of the tower top bracket 2, and a sliding block 11 is slidingly connected in the movable guide rail 10, and a telescopic motor 12 is fixedly mounted on the end of the movable guide rail 10, and the telescopic end of the telescopic motor 12 is fixedly connected to a sliding block 11, and a hoist 13 is fixedly mounted on the sliding block 11, and the driving end of the hoist 13 is connected to one end of a steel wire rope 14, and the other end of the steel wire rope 14 is fixedly connected to the outer gear plate 5.

[0020] Working principle: During assembly, the blade clamp 1 and the fixing rod 3 and other components are fixedly installed on the blade to be installed, and the center of gravity of the blade is located between the two blade clamps 1, and then the end of the wire rope 14 connected to the driving end of the hoist 13 is connected to the outer gear plate 5; during hoisting, the hoist 13 is first controlled to pull the wire rope 14 to lift the fan blade to a certain height, and then the driving shaft of the rotating motor 8 is controlled to drive the outer gear 7 to rotate, and the outer gear ring of the outer gear 7 is meshed with the inner gear ring of the outer gear plate 5, and because the outer gear ring The gear plate 5 is fixed by a steel wire rope 14, so that the outer gear 7 will rotate along the edge of the outer gear plate 5, and then drive the entire blade to rotate around the axis of the outer gear plate 5, so as to achieve the effect of adjusting the blade installation angle; when the rotation is adjusted to the appropriate angle, the hoist 13 is controlled to synchronously lift the steel wire rope 14 upward, and at the same time, the telescopic motor 12 is controlled to drive the sliding block 11 to slide in the movable guide rail 10, so that the hoist 13 moves toward the cabin, thereby controlling the wind turbine blade to move to the tower top installation position, and the installation and tightening of the blade root can be completed.

[0021] The second embodiment is a further improvement on the first embodiment, in order to ensure that the axis of the outer gear plate 5 coincides with the center of gravity of the fan blade. This ensures that the fan blade is more stably mounted without tilting during installation, and also reduces power loss when the outer gear plate 5 is driven by the outer gear 7.

[0022] Embodiment 3, based on further improvement of embodiment 1, the outer surface of the outer gear plate 5 is fixedly connected with a lifting ring 15, and the other end of the wire rope 14 is fixedly connected to the lifting ring 15. When hoisting, the end of the wire rope 14 can be directly connected to the lifting ring 15.

[0023] In the fourth embodiment, based on a further improvement on the first embodiment, four hoists 13 are provided and evenly distributed on the movable guide rails 10 on both sides of the upper surface of the tower top support 2. The driving end of each hoist 13 is connected to a steel wire rope 14. The four steel wire ropes 14 are respectively connected to the outer gear discs 5 on both sides of the blade, and each outer gear disc 5 is fixedly connected to two steel wire ropes 14. The joint pulling action of the four hoists 13 further ensures stability during hoisting. In this embodiment, the four hoists 13 are respectively mounted on four sliding blocks 11, and each sliding block 11 is connected to a telescopic motor 12, so that the four hoists 13 can be lifted or moved synchronously or independently.

[0024] 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 adjustment and hoisting device for a wind turbine, characterized in that: The present invention comprises two blade clamps and a tower top bracket, wherein the two blade clamps are respectively fixedly mounted on both sides of the center of gravity of the blade, and the two side surfaces of the two blade clamps are connected by a fixing rod, and the fixing rod is arranged parallel to the axis of the blade, and the fixing rod is movably connected to an external gear plate through a rotating shaft, and an inner gear ring is arranged along the edge of the outer surface of the external gear plate, and an external gear is arranged on the external gear plate offset from the axis, and the outer gear ring of the external gear is meshed with the inner gear ring of the external gear plate, and the central axis of the external gear is transmission-connected to the driving end of the rotating motor, and the rotating motor is fixedly mounted on one end of the mounting frame, and the other end of the mounting frame is fixedly mounted on the fixing rod; The tower top bracket is fixedly installed in the nacelle of the wind turbine generator, and a movable guide rail is fixedly installed on the upper surface of the tower top bracket, a sliding block is slidably connected in the movable guide rail, a telescopic motor is fixedly installed at the end of the movable guide rail, the telescopic end of the telescopic motor is fixedly connected to a sliding block, a hoist is fixedly installed on the sliding block, a driving end of the hoist is connected to one end of a steel wire rope, and the other end of the steel wire rope is fixedly connected to an external gear plate; The axis center position of the outer gear plate coincides with the center of gravity of the blade; There are four hoists, which are evenly distributed on the movable guide rails on both sides of the upper surface of the tower top bracket. The driving end of each hoist is connected to a steel wire rope. The four steel wire ropes are respectively connected to the outer gear plates on both sides of the blade, and each outer gear plate is fixedly connected to two steel wire ropes.

2. The blade adjustment and hoisting device for a wind turbine according to claim 1, characterized in that: A lifting ring is fixedly connected to the outer surface of the outer gear plate, and the other end of the steel wire rope is fixedly connected to the lifting ring.

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