A hoisting device for wind turbine operation and maintenance

Abstract

A hoisting device for wind turbine operation and maintenance includes a support frame, a telescopic boom and a ground winch; a first fixed pulley is installed below the support frame, a square tube beam is installed below the support frame, a second fixed pulley and a horizontal reversing wheel are installed on both sides of the square tube beam, a third fixed pulley, a fourth fixed pulley, a fifth fixed pulley and a sixth fixed pulley are installed at both ends of the telescopic boom, a seventh fixed pulley and an eighth fixed pulley are installed below the telescopic boom, and a first movable pulley and a second movable pulley are installed on both sides of the clamping jaw; a steel wire rope is installed on the square tube beam after passing through the first fixed pulley, the second fixed pulley, the third fixed pulley, the fifth fixed pulley, the first movable pulley, the seventh fixed pulley, the horizontal reversing wheel, the eighth fixed pulley, the second movable pulley, the sixth fixed pulley and the fourth fixed pulley in sequence. The invention uses the transmission effect between the fixed pulleys to ensure that the clamping jaw does not move up and down during the forward and backward movement of the telescopic boom, thereby avoiding collisions and unnecessary dangers during the hoisting process.

Description

Technical Field

[0001] The invention relates to the technical field of gear box hoisting equipment, and in particular to a hoisting equipment used for operation and maintenance of a wind turbine generator set. Background Art

[0002] The gearbox is an important component of the doubly-fed wind turbine generator set. Due to design defects, inadequate maintenance and poor operating conditions of early wind turbines, the gearbox inevitably has problems such as tooth bite, tooth peeling, bearing jamming and even broken teeth, which seriously affect the normal operation of the wind turbine. High-speed pinions or bearings can be repaired on the tower due to their small size and light weight. If the low-speed or planetary sun gear is damaged, repair will become quite difficult. Due to the large diameter and heavy weight of the parallel-stage low-speed large gear, it cannot pass through the lifting hole of the cabin. At the same time, there is no equipment with sufficient rated load for lifting in the cabin. Therefore, the low-speed or planetary sun gear cannot be repaired on the tower if it is damaged.

[0003] At present, it is a common practice to remove the gearbox as a whole from the shelf and return it to the factory for repair. For example, the invention patent with application number "CN201911285064.X" discloses a method for repairing the gearbox on a wind turbine tower, which mainly uses the coordinated action of a cantilever crane and a ground winch to achieve the work of lifting large-diameter and heavy-weight parts in the gearbox and transporting them to the ground. However, after lifting the parts in the gearbox, the cantilever crane needs to extend the telescopic cantilever in the cantilever crane in the horizontal direction for a certain distance while ensuring that the vertical height of the parts remains unchanged. Therefore, in this process, the ground winch and the drive motor that drives the telescopic cantilever to move need to cooperate with each other to operate together. If the cooperation is inappropriate, it is very easy to cause the height of the hoisted parts to change continuously, which is very easy to cause bumps and unnecessary dangers. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a hoisting device for operation and maintenance of wind turbines, which overcomes the deficiencies in the prior art and has a reasonable design. Through the transmission action between the first fixed pulley, the second fixed pulley, the third fixed pulley, the fifth fixed pulley, the seventh fixed pulley, the horizontal reversing wheel, the eighth fixed pulley, the sixth fixed pulley and the fourth fixed pulley, the clamping jaws do not move up and down during the forward and backward movement of the telescopic cantilever, but remain relatively still with the telescopic cantilever, thereby avoiding bumps and unnecessary dangers during the hoisting process.

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

[0006] A hoisting device for wind turbine operation and maintenance comprises a support frame, a telescopic cantilever and a ground winch, wherein the telescopic cantilever is movably connected in the support frame; an extension pulley frame is fixedly connected to one end below the support frame, a first fixed pulley is movably installed at the end of the extension pulley frame, a square tube beam is fixedly installed in the middle below the support frame, a second fixed pulley and a horizontal reversing wheel are respectively installed on both sides of the square tube beam through a mounting plate, the second fixed pulley is located on a side of the square tube beam close to the first fixed pulley, a third fixed pulley and a fourth fixed pulley are installed at one end of the telescopic cantilever close to the first fixed pulley, and the end of the telescopic cantilever away from the first fixed pulley is A fifth fixed pulley and a sixth fixed pulley are installed, a seventh fixed pulley and an eighth fixed pulley are installed below one end of the telescopic cantilever away from the first fixed pulley, and clamps are provided below the fifth fixed pulley and the sixth fixed pulley, and the clamps are respectively installed with the first movable pulley and the second movable pulley; the driving end of the ground winch is fixedly connected to one end of the steel wire rope, and the other end of the steel wire rope is fixedly installed on the square tube beam through a wedge joint after successively passing through the first fixed pulley, the second fixed pulley, the third fixed pulley, the fifth fixed pulley, the first movable pulley, the seventh fixed pulley, the horizontal reversing wheel, the eighth fixed pulley, the second movable pulley, the sixth fixed pulley and the fourth fixed pulley.

[0007] Preferably, a power bracket is fixedly installed in the middle of the upper surface of the support frame, and a first sprocket frame and a second sprocket frame are fixedly installed on both sides of the power bracket, and the first sprocket frame is movably connected with the first sprocket and the second sprocket via a bearing, and the second sprocket frame is movably connected with the third sprocket and the fourth sprocket via a bearing, and a driving motor is fixedly installed on one side above the support frame, and the driving end of the driving motor is transmission-connected to the first sprocket through a driving shaft, and one end of a chain is fixedly installed on one end of the upper surface of the telescopic cantilever, and the other end of the chain passes around the second sprocket, the first sprocket, the third sprocket and the fourth sprocket in sequence and is fixedly connected to the other end of the upper surface of the telescopic cantilever.

[0008] Preferably, slide grooves are provided on both side surfaces of the telescopic cantilever, and sliding rollers are installed on both sides of the inner surface of the support frame through roller mounting plates, and the support frame is slidably connected inside the slide grooves through the sliding rollers.

[0009] Preferably, the third fixed pulley and the fourth fixed pulley are fixedly connected via a first fixed pulley shaft, the fifth fixed pulley and the sixth fixed pulley are fixedly connected via a second fixed pulley shaft, and the seventh fixed pulley and the eighth fixed pulley are fixedly connected via a third fixed pulley shaft.

[0010] The present invention provides a hoisting device for wind turbine operation and maintenance. It has the following beneficial effects: the low-speed large gear can be conveniently and smoothly hoisted out of the cabin through the telescopic cantilever, the gear can be hoisted to the ground with the help of a ground winch, and then the gear to be replaced can be hoisted into the cabin for replacement; and through the transmission effect between the first fixed pulley, the second fixed pulley, the third fixed pulley, the fifth fixed pulley, the seventh fixed pulley, the horizontal reversing wheel, the eighth fixed pulley, the sixth fixed pulley and the fourth fixed pulley, the clamping claw will not move up and down during the forward and backward movement of the telescopic cantilever, but will remain relatively still with the telescopic cantilever, thereby avoiding collisions and unnecessary dangers during the hoisting process. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0013] Figure 2 A schematic diagram of the structure of the support frame in the present invention;

[0014] Figure 3 A schematic diagram of the structure of the support frame of the present invention after removing the power support;

[0015] Figure 4 The structure of the telescopic cantilever in the present invention is schematically shown Figure 1 ;

[0016] Figure 5 The structure of the telescopic cantilever in the present invention is schematically shown Figure 2 ;

[0017] Figure 6 The structure of the power support in the present invention is schematically shown Figure 1 ;

[0018] Figure 7 The structure of the power support in the present invention is schematically shown Figure 2 ;

[0019] Description of the numbers in the figure:

[0020] 1. Support frame; 2. Telescopic cantilever; 3. Ground winch; 4. Power bracket; 5. First sprocket frame; 6. Second sprocket frame; 7. First sprocket; 8. Second sprocket; 9. Third sprocket; 10. Fourth sprocket; 11. Driving motor; 12. Driving shaft; 13. Chain; 14. Extended pulley frame; 15. First fixed pulley; 16. Square tube beam; 17. Second fixed pulley; 18. Horizontal reversing wheel; 19. Third fixed pulley; 20. Fourth fixed pulley; 21. Fifth fixed pulley; 22. Sixth fixed pulley; 23. Seventh fixed pulley; 24. Eighth fixed pulley; 25. Clamp; 26. First movable pulley; 27. Second movable pulley; 28. Wedge joint; 29. ​​Slide; 30. Sliding roller; 31. First fixed pulley shaft; 32. Second fixed pulley shaft; 33. Third fixed pulley shaft; 34. Wire rope. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1, as Figure 1-5 As shown, a hoisting device for wind turbine operation and maintenance comprises a support frame 1, a telescopic boom 2 and a ground winch 3, wherein the telescopic boom 2 is movably connected in the support frame 1; an extension pulley frame 14 is fixedly connected to one end below the support frame 1, and a first fixed pulley 15 is movably installed at the end of the extension pulley frame 14; a square tube beam 16 is fixedly installed in the middle below the support frame 1, and a second fixed pulley 17 and a horizontal reversing wheel 18 are respectively installed on both sides of the square tube beam 16 through mounting plates, and the second fixed pulley 17 is located on a side of the square tube beam 16 close to the first fixed pulley 15, a third fixed pulley 19 and a fourth fixed pulley 20 are installed at one end of the telescopic boom 2 close to the first fixed pulley 15, and a fifth fixed pulley 21 is installed at one end of the telescopic boom 2 away from the first fixed pulley 15 and the sixth fixed pulley 22, the seventh fixed pulley 23 and the eighth fixed pulley 24 are installed below the end of the telescopic cantilever 2 away from the first fixed pulley 15, and the clamping claw 25 is provided below the fifth fixed pulley 21 and the sixth fixed pulley 22, and the clamping claw 25 is respectively installed with the first movable pulley 26 and the second movable pulley 27; the driving end of the ground winch 3 is fixedly connected to one end of the wire rope 34, and the other end of the wire rope 34 is fixedly installed on the square tube beam 16 through the wedge joint 28 after passing through the first fixed pulley 15, the second fixed pulley 17, the third fixed pulley 19, the fifth fixed pulley 21, the first movable pulley 26, the seventh fixed pulley 23, the horizontal reversing wheel 18, the eighth fixed pulley 24, the second movable pulley 27, the sixth fixed pulley 22 and the fourth fixed pulley 20 in sequence.

[0023] When in use, first make the clamping claw 25 below the end of the telescopic cantilever 2 correspond to the position of the gear box in the cabin, and then control the ground hoist 3 to drive the wire rope 34 to stretch the clamping claw 25, and then the damaged low-speed large gear or planetary sun gear in the gear box can be lifted out. After lifting to a suitable position, the ground hoist 3 can be controlled to stop running, and then the telescopic cantilever 2 can be controlled to slide in the support frame 1, and then the clamping claw 25 and the damaged parts can be moved out of the cabin in the horizontal direction, and then the ground hoist 3 can be started to release the wire rope 34 at a uniform speed, so that the low-speed large wheel or planetary sun gear can be smoothly lowered to the ground; then the new parallel-stage low-speed large wheel or planetary sun gear is lifted from the ground into the cabin for installation; the above-mentioned reverse operation steps can be performed when lifting and installing; in this embodiment, the support frame 1 can be fixed on the gantry bracket to provide support for the telescopic cantilever 2;

[0024] In this embodiment, during the process of controlling the telescopic boom 2 to slide in the support frame 1, the total length of the wire rope 34 to the fixed end of the wedge-shaped joint 28 remains unchanged through the action of the first fixed pulley 15, the second fixed pulley 17, the third fixed pulley 19, the fifth fixed pulley 21, the seventh fixed pulley 23, the horizontal reversing wheel 18, the eighth fixed pulley 24, the sixth fixed pulley 22 and the fourth fixed pulley 20, so that during the forward and backward movement of the telescopic boom 2, the clamping jaw 25 does not move up and down, but remains relatively still with the telescopic boom 2, thereby avoiding bumps and unnecessary dangers during the lifting process.

[0025] Embodiment 2, as Figure 1-7 As shown, as a further scheme of Example 1, a power bracket 4 is fixedly installed in the middle of the upper surface of the support frame 1, and a first sprocket frame 5 and a second sprocket frame 6 are fixedly installed on both sides of the power bracket 4, respectively. The first sprocket frame 5 is movably connected with the first sprocket 7 and the second sprocket 8 through a bearing, and the second sprocket frame 6 is movably connected with the third sprocket 9 and the fourth sprocket 10 through a bearing. A driving motor 11 is fixedly installed on one side above the support frame 1, and the driving end of the driving motor 11 is transmission-connected with the first sprocket 6 through a driving shaft 12. One end of a chain 13 is fixedly installed on one end of the upper surface of the telescopic cantilever 2, and the other end of the chain 13 passes around the second sprocket 8, the first sprocket 7, the third sprocket 9 and the fourth sprocket 10 in sequence and is fixedly connected to the other end of the upper surface of the telescopic cantilever 2.

[0026] Therefore, when controlling the telescopic boom 2 to move forward and backward, the drive motor 11 can be started, and the drive shaft 12 can be driven to rotate through the drive end of the drive motor 11, and then the first sprocket 6 can be driven to rotate. Since the chain 13 is meshed with the first sprocket 6 through gears, when the first sprocket 6 rotates, the chain 13 can be driven to move, thereby driving the telescopic boom 2 to move forward and backward; in this embodiment, the chain 13 is meshed with the second sprocket 8, the first sprocket 7, the third sprocket 9 and the fourth sprocket 10 respectively to ensure that the chain 13 can be more stable during the movement.

[0027] Embodiment 3, as a further solution of embodiment 1, slide grooves 29 are provided on both sides of the telescopic cantilever 2, and sliding rollers 30 are installed on both sides of the inner surface of the support frame 1 through roller mounting plates, and the support frame 1 is connected to the inside of the slide groove 29 by rolling through the sliding rollers 30. The rolling action of the sliding rollers 30 in the slide grooves 29 ensures the stability of the sliding rollers 30 when rolling in the support frame 1.

[0028] Embodiment 4, as a further solution of embodiment 1, the third fixed pulley 19 and the fourth fixed pulley 20 are fixedly connected by the first fixed pulley shaft 31, the fifth fixed pulley 21 and the sixth fixed pulley 22 are fixedly connected by the second fixed pulley shaft 32, and the seventh fixed pulley 23 and the eighth fixed pulley 24 are fixedly connected by the third fixed pulley shaft 33. The first fixed pulley shaft 31 can ensure that the third fixed pulley 19 and the fourth fixed pulley 20 rotate synchronously, the second fixed pulley shaft 32 can ensure that the fifth fixed pulley 21 and the sixth fixed pulley 22 rotate synchronously, and the third fixed pulley shaft 33 can ensure that the seventh fixed pulley 23 and the eighth fixed pulley 24 rotate synchronously, so that the stability of the clamp 25 and the damaged parts when the entire wire rope 34 moves can be ensured.

[0029] 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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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 hoisting device for wind turbine operation and maintenance, characterized in that: The invention comprises a support frame (1), a telescopic boom (2) and a ground winch (3), wherein the telescopic boom (2) is movably connected in the support frame (1); an extension pulley frame (14) is fixedly connected to one end below the support frame (1), a first fixed pulley (15) is movably mounted on the end of the extension pulley frame (14), a square tube beam (16) is fixedly mounted in the middle below the support frame (1), a second fixed pulley (17) and a horizontal reversing wheel (18) are respectively mounted on both sides of the square tube beam (16) via mounting plates, the second fixed pulley (17) is located on a side of the square tube beam (16) close to the first fixed pulley (15), and the second fixed pulley (17) is located on a side of the square tube beam (16) close to the first fixed pulley (15). A third fixed pulley (19) and a fourth fixed pulley (20) are mounted on one end of the telescopic arm (2) close to the first fixed pulley (15); a fifth fixed pulley (21) and a sixth fixed pulley (22) are mounted on one end of the telescopic arm (2) away from the first fixed pulley (15); a seventh fixed pulley (23) and an eighth fixed pulley (24) are mounted below one end of the telescopic arm (2) away from the first fixed pulley (15); a clamping claw (25) is arranged below the fifth fixed pulley (21) and the sixth fixed pulley (22); and a first movable pulley (26) and a second movable pulley (27) are mounted on both sides of the clamping claw (25); The driving end of the ground hoist (3) is fixedly connected to one end of a steel wire rope (34), and the other end of the steel wire rope (34) is successively passed around the first fixed pulley (15), the second fixed pulley (17), the third fixed pulley (19), the fifth fixed pulley (21), the first movable pulley (26), the seventh fixed pulley (23), the horizontal reversing wheel (18), the eighth fixed pulley (24), the second movable pulley (27), the sixth fixed pulley (22) and the fourth fixed pulley (20), and then fixedly mounted on the square tube beam (16) through a wedge joint (28); A power bracket (4) is fixedly mounted in the middle of the upper surface of the support frame (1); a first sprocket frame (5) and a second sprocket frame (6) are fixedly mounted on both sides of the power bracket (4); a first sprocket (7) and a second sprocket (8) are movably connected in the first sprocket frame (5) via a bearing; a third sprocket (9) and a fourth sprocket (10) are movably connected in the second sprocket frame (6) via a bearing; a drive motor (11) is fixedly mounted on one side above the support frame (1); a drive end of the drive motor (11) is transmission-connected to the first sprocket (7) via a drive shaft (12); one end of a chain (13) is fixedly mounted on one end of the upper surface of the telescopic cantilever (2); the other end of the chain (13) passes through the second sprocket (8), the first sprocket (7), the third sprocket (9) and the fourth sprocket (10) in sequence and is fixedly connected to the other end of the upper surface of the telescopic cantilever (2); Slide grooves (29) are provided on both side surfaces of the telescopic cantilever (2), and sliding rollers (30) are installed on both sides of the inner surface of the support frame (1) via roller mounting plates, and the support frame (1) is rollingly connected inside the slide grooves (29) via the sliding rollers (30).

2. The hoisting equipment for wind turbine operation and maintenance according to claim 1, characterized in that: The third fixed pulley (19) and the fourth fixed pulley (20) are fixedly connected via a first fixed pulley shaft (31), the fifth fixed pulley (21) and the sixth fixed pulley (22) are fixedly connected via a second fixed pulley shaft (32), and the seventh fixed pulley (23) and the eighth fixed pulley (24) are fixedly connected via a third fixed pulley shaft (33).

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