An auxiliary hoisting device for offshore wind turbine generator system

Abstract

The application relates to the technical field of hoisting auxiliary machinery, in particular to an offshore wind turbine auxiliary hoisting device, which comprises a connecting bridge, generator fan blade fixing devices are arranged at the two ends of the connecting bridge, the generator fan blade fixing devices comprise U-shaped frames, the openings of the U-shaped frames face the front of the connecting bridge, self-adapting fixing devices which can be self-adapted and adjusted according to the thickness of the generator fan blades are arranged in the U-shaped frames, and bottom supporting devices which can assist the generator fan blades to enter the U-shaped frames and assist the self-adapting fixing devices to clamp are arranged at the bottoms of the U-shaped frames. The offshore wind turbine auxiliary hoisting device can be self-adapted and clamped, has high positioning stability and high efficiency, and has high compatibility.

Description

Technical Field

[0001] This invention relates to the field of hoisting auxiliary machinery technology, specifically to an auxiliary hoisting device for offshore wind turbine generator sets. Background Technology

[0002] The installation of offshore wind turbine generators is a crucial step in the construction of offshore wind power projects. Wind turbine blades are enormous in size and weight, and their installation locations are in the rough seas of the ocean. Traditional installation operations primarily rely on large crane vessels and general-purpose clamps. However, this method has the following significant problems:

[0003] 1. Poor environmental adaptability: The wind and waves at sea cause the fan blades to shake violently during the hoisting process, and the general-purpose clamps are difficult to hold the curved fan blades stably; especially when the fan blades are placed at an angle or the installation height difference is large, the force at the clamping point is uneven, which can easily lead to slippage or structural damage.

[0004] 2. Efficiency bottleneck: The blades need to be manually adjusted to match the clamps. Due to the large size of the blades, manual adjustment requires 6-8 operators to work together. In harsh sea conditions, the operation is time-consuming and risky.

[0005] 3. Insufficient compatibility: Different models of fan blades have large differences in thickness and curvature, and traditional fixtures cannot adapt to them, requiring frequent tooling changes. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an auxiliary hoisting device for offshore wind turbine generators, which can adaptively clamp, improve stability, and efficiently position, and has high compatibility.

[0007] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: an auxiliary hoisting device for offshore wind turbine generator sets, which includes a connecting bridge, and generator blade fixing devices are provided at both ends of the connecting bridge. The generator blade fixing device includes a U-shaped frame, the opening of the U-shaped frame facing the front of the connecting bridge, an adaptive fixing device that can be adaptively adjusted according to the thickness of the generator blades is provided inside the U-shaped frame, and a bottom support device is provided at the bottom of the U-shaped frame to assist the generator blades in entering the U-shaped frame and to assist the adaptive fixing device in clamping them.

[0008] As an improvement, the adaptive fixing device includes a slider that can move up and down at the closed end of the U-shaped frame. A three-end slide rail is fixedly installed on the side of the slider near the open end of the U-shaped frame. An L-shaped top plate is slidably connected to the upward end of the three-end slide rail. The L-shaped top plate is always in contact with the upper end of the U-shaped frame. Adaptive clamping plates are slidably connected to the two downward ends of the three-end slide rail. A first hydraulic telescopic rod is provided at the axis of the three-end slide rail. A hexagonal connecting sleeve is fixedly connected to the telescopic end of the first hydraulic telescopic rod. A connecting rod is hinged between the hexagonal connecting sleeve, the L-shaped top plate, and the adaptive clamping plate.

[0009] As an improvement, the U-shaped frame includes a U-shaped frame body, the sealed end of the U-shaped frame body is provided with a cavity for the slider to slide up and down, and the U-shaped frame body is provided with a through groove for the connection between the slider and the three-end slide rail to move up and down.

[0010] As an improvement, a spring is provided inside the cavity to tend to move the slider upward.

[0011] As an improvement, a roller is hinged to the bottom of the adaptive clamping plate, and a pressure plate is fixedly installed at the bottom of the roller. There is a gap between the pressure plate and the adaptive clamping plate, and a groove is provided at the bottom of the adaptive clamping plate for the roller to rotate.

[0012] As an improvement, the bottom support device includes a second hydraulic telescopic rod fixedly installed at the bottom of the sealed end of the U-shaped frame. A first shaft is fixedly installed at the telescopic end of the second hydraulic telescopic rod. A support plate is hinged to the first shaft. A pad is provided at the top of the support plate away from the first shaft. A roller for sliding at the bottom of the support plate is hinged to the lower end of the U-shaped frame.

[0013] As an improvement, the connecting bridge includes a bridge body, a second shaft frame is provided on the bridge body, a hoisting main rod is hinged to the second shaft frame, a rotating machine is hinged to the top of the hoisting main rod, and a lifting lug is provided on the top of the rotating machine.

[0014] As an improvement, a third hydraulic telescopic rod is hinged between the main hoisting rod and the bridge body.

[0015] With the above structure, the present invention has the following advantages:

[0016] 1. Adaptive clamping and improved stability: The hexagonal connecting sleeve is driven by the first hydraulic telescopic rod, which simultaneously controls the L-shaped top plate to press down and the two adaptive clamping plates to retract, so as to achieve dynamic fitting of the blade thickness and the curved surface. The hinged roller at the bottom of the adaptive clamping plate can rotate with the curvature of the blade. The gap between the pressure plate and the clamping plate allows for slight swinging, avoids rigid friction damage to the blade surface, and maintains flexible clamping force in wind and waves.

[0017] 2. High-efficiency positioning and anti-interference design: The second hydraulic telescopic rod pushes the support plate to unfold around the roller, and the pad blocks form a lifting slope to guide the fan blades into the U-shaped frame; after hydraulic retraction, the support plate retracts, and the fan blades fall precisely into the clamping area, avoiding interference between the support structure and the hoisting path.

[0018] 3. Multi-degree-of-freedom hoisting adjustment: The third hydraulic telescopic rod adjusts the tilt angle of the hoisting main rod, and the rotating machine achieves 360° fine adjustment on the horizontal plane. After being connected to the crane through the lifting lugs, it forms a multi-degree-of-freedom hoisting system, which greatly reduces the difficulty of manual positioning. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an auxiliary hoisting device for offshore wind turbine generators according to the present invention. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the structure of an auxiliary hoisting device for offshore wind turbine generators according to the present invention. Figure 2 .

[0021] Figure 3 This is a schematic diagram of the generator blade fixing device of an auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0022] Figure 4 This is an exploded view of the generator blade fixing device of an auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0023] Figure 5 This is a schematic diagram of the U-shaped frame of an auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0024] Figure 6 This is a schematic diagram of the adaptive fixing device of an auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0025] Figure 7 This is an exploded view of the adaptive fixing device of the auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0026] Figure 8 This is a schematic diagram of the adaptive clamping plate of an auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0027] Figure 9 This is an exploded view of the bottom support device of an auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0028] Figure 10 This is a schematic diagram of the connecting bridge of an auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0029] Figure 11 This is an exploded view of the connecting bridge structure of an auxiliary hoisting device for offshore wind turbine generators according to the present invention.

[0030] As shown in the figure: 1. Connecting bridge; 11. Bridge body; 12. Second shaft frame; 13. Rotating machine; 14. Hoisting main rod; 15. Third hydraulic telescopic rod; 16. Lifting lug; 3. Generator blade fixing device; 31. U-shaped frame; 311. U-shaped frame body; 312. Cavity; 313. Through groove; 314. Roller; 32. Self-adaptive fixing device; 321. Slider; 322. Three-end slide rail; 323. First hydraulic telescopic rod; 324. L-shaped top plate; 325. Hexagonal connecting sleeve; 326. Connecting rod; 327. Self-adaptive clamping plate; 328. Roller; 329. Pressure plate; 33. Bottom support device; 331. Support plate; 332. Pad; 333. First shaft frame; 334. Second hydraulic telescopic rod. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 10 and attached Figure 11 :

[0033] An auxiliary hoisting device for offshore wind turbine generator sets includes a connecting bridge 1, with generator blade fixing devices 3 at both ends of the connecting bridge 1. The connecting bridge 1 includes a bridge body 11, a second shaft frame 12 on the bridge body 11, a hoisting main rod 14 hinged to the second shaft frame 12, a rotating machine 13 hinged to the top of the hoisting main rod 14, a lifting lug 16 on the top of the rotating machine 13, and a third hydraulic telescopic rod 15 hinged between the hoisting main rod 14 and the bridge body 11.

[0034] In existing technologies, when hoisting and installing the fan blades of offshore generator sets, the angle of the lifting equipment is adjusted solely by slings. However, due to the frequent wind and waves at sea, the lack of rigid connection makes it difficult to adjust the installation angle of the fan blades, and the installation efficiency is low. With this structure, the third hydraulic telescopic rod 15 can adjust the tilt angle of the hoisting main rod 14, the rotating machine 13 can achieve fine adjustment of the horizontal plane angle, and the lifting lug 16 is connected to the crane to form a multi-degree-of-freedom hoisting system, ensuring that the fan blades are accurately aligned with the hub.

[0035] Combined with appendix Figure 1 Appendix Figure 3 Appendix Figure 5 Appendix Figure 6 and attached Figure 7 :

[0036] The generator blade fixing device 3 includes a U-shaped frame 31, with the opening of the U-shaped frame 31 facing the front of the connecting bridge 1. The U-shaped frame 31 is provided with an adaptive fixing device 32 that can be adaptively adjusted according to the thickness of the generator blade. The adaptive fixing device 32 includes a slider 321 that can move up and down at the closed end of the U-shaped frame 31. A three-end slide rail 322 is fixedly installed on the side of the slider 321 near the open end of the U-shaped frame 31. An L-shaped top plate 324 is slidably connected to the upward end of the three-end slide rail 322. The L-shaped top plate 324 is always in contact with the upper end of the U-shaped frame 31. Adaptive clamping plates 327 are slidably connected to the two downward ends of the three-end slide rail 322. A first hydraulic telescopic rod 323 is provided at the axis of the three-end slide rail 322. A hexagonal connecting sleeve 325 is fixedly connected to the telescopic end of the first hydraulic telescopic rod 323. A connecting rod 326 is hinged between the hexagonal connecting sleeve 325, the L-shaped top plate 324, and the adaptive clamping plate 327.

[0037] The U-shaped frame 31 includes a U-shaped frame body 311. The closed end of the U-shaped frame body 311 is provided with a cavity 312 for the slider 321 to slide up and down. The U-shaped frame body 311 is provided with a through groove 313 for the connection between the slider 321 and the three-end slide rail 322 to move up and down. A spring is provided in the cavity 312 to make the slider 321 move upward.

[0038] The blades of offshore generator sets are usually over 80 meters long. To balance the stability of the blade lifting process, the clamping part of the blades is usually closer to the blade root. However, since the blade and the blade root are curved, traditional hoisting devices are not easy to clamp stably during the clamping process and are prone to damaging the blades.

[0039] With this structure, when the first hydraulic telescopic rod 323 pushes the hexagonal connecting sleeve 325, the L-shaped top plate 324 and the three-end slide rail 322 are relatively displaced, causing the three-end slide rail 322 and the first hydraulic telescopic rod 323 to move downward as a whole. At the same time, the adaptive clamping plate 327 also moves along the two ends below the three-end slide rail 322, thereby clamping the fan blade. Since the surface of the fan blade is usually not completely horizontal, it can be ensured that one of the adaptive clamping plates 327 is in contact with the surface of the fan blade.

[0040] Combined with appendix Figure 3 Appendix Figure 6 Appendix Figure 7 and attached Figure 8 :

[0041] The adaptive clamping plate 327 is hinged to a roller 328 at its bottom. A pressure plate 329 is fixedly installed at the bottom of the roller 328. There is a gap between the pressure plate 329 and the adaptive clamping plate 327. The bottom of the adaptive clamping plate 327 is provided with a groove for the roller 328 to rotate.

[0042] Since the clamping part of the fan blade of an offshore generator set is usually close to the root of the blade, and the surface between the blade and the root of the blade is curved, the blade is easily damaged by rigid friction between the lifting device and the blade during the clamping process of traditional lifting devices. With this structure, when the adaptive clamping plate 327 contacts the curved surface of the fan blade, the roller 328 can rotate freely with the curvature of the fan blade to avoid damage to the blade by rigid friction. The gap between the pressure plate 329 and the adaptive clamping plate 327 allows the pressure plate to swing slightly, further adapting to the unevenness of the fan blade surface and achieving flexible clamping in wind and waves.

[0043] Combined with appendix Figure 3 Appendix Figure 4 Appendix Figure 5 and attached Figure 9 :

[0044] The bottom of the U-shaped frame 31 is provided with a bottom support device 33, which can assist the generator fan blades to enter the U-shaped frame 31 and assist the self-adaptive fixing device 32 to clamp them. The bottom support device 33 includes a second hydraulic telescopic rod 334 fixedly installed at the bottom of the sealed end of the U-shaped frame body 311. A first shaft frame 333 is fixedly installed at the telescopic end of the second hydraulic telescopic rod 334. A support plate 331 is hinged on the first shaft frame 333. A pad block 332 is provided at the top of the support plate 331 away from the first shaft frame 333. A roller 314 for sliding at the bottom of the support plate 331 is hinged at the lower end of the U-shaped frame body 311.

[0045] Because the fan blades of offshore generator sets are relatively large, the existing technology requires multiple operators to work together to install the fan blades into the hoisting fixture. Furthermore, manual fine-tuning is required before the upper fixture can be activated to fix the fan blades after they have entered the U-shaped frame 31, which is time-consuming and labor-intensive. With this structure, the second hydraulic telescopic rod 334 pushes the support plate 331 to rotate and unfold around the roller 314, and the pad block 332 forms a lifting slope to guide the fan blades to slide into the U-shaped frame 31.

[0046] When the hydraulic rod retracts, the bottom of the support plate 331 retracts along the roller 314, so that the fan blade falls completely into the clamping range of the adaptive fixing device 32. One end of the pad 332 is raised, which increases the clamping force and avoids interference between the support structure and the fan blade hoisting path.

[0047] In a specific implementation of the present invention, the crane hook is connected through the lifting lug 16, the third hydraulic telescopic rod 15 is activated to adjust the initial tilt angle of the main lifting rod 14, and the rotating machine 13 is pre-adjusted to the horizontal plane 0° reference position to ensure that the opening direction of the U-shaped frame 31 is directly facing the fan blade conveying path.

[0048] Activate the second hydraulic telescopic rod 334 of the bottom support device 33 to push the support plate 331 to unfold around the roller 314 to an inclined state. See Appendix. Figure 3At this time, the pad block 332 forms a guide slope. The crane slides the bottom of the fan blade along the slope of the pad block 332 into the U-shaped frame 31. The second hydraulic telescopic rod 334 is activated again to pull the support plate 331 inward to move around the roller 314. At this time, the pad block 332 tends to move upward until the pad block 332 contacts the bottom of the fan blade.

[0049] The first hydraulic telescopic rod 323 is triggered to extend, pushing the hexagonal connecting sleeve 325 forward. The upper connecting rod 326 pulls the L-shaped top plate 324 against the upper end of the U-shaped frame 311, causing the three-end slide rail 322 to press down. The adaptive clamping plate 327 opens synchronously along the three-end slide rail 322 until the three-end slide rail 322 is tightly against the upper surface of the fan blade. The clamping force is transmitted to the curved surface of the fan blade through the pressure plate 329. When the curvature of the fan blade surface is uneven, such as the difference in the curvature of the blade root, the roller 328 rotates adaptively in the groove, and the pressure plate 329 and the adaptive clamping plate 327 swing slightly to avoid local stress concentration.

[0050] The present invention and its embodiments have been described above. This description is not restrictive, and the actual structure is not limited thereto. In short, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An auxiliary hoisting device for an offshore wind turbine generator set, comprising a connecting bridge (1), wherein generator blade fixing devices (3) are provided at both ends of the connecting bridge (1), characterized in that: The generator blade fixing device (3) includes a U-shaped frame (31), the opening of the U-shaped frame (31) faces the front of the connecting bridge (1), the U-shaped frame (31) is provided with an adaptive fixing device (32) that can be adaptively adjusted according to the thickness of the generator blade, and the bottom of the U-shaped frame (31) is provided with a bottom support device (33) that can assist the generator blade to enter the U-shaped frame (31) and assist the adaptive fixing device (32) in clamping it. The adaptive fixing device (32) includes a slider (321) that can move up and down at the sealed end of the U-shaped frame (31). A three-end slide rail (322) is fixedly installed on the side of the slider (321) near the open end of the U-shaped frame (31). An L-shaped top plate (324) is slidably connected to the upward end of the three-end slide rail (322). The L-shaped top plate (324) is always in contact with the upper end of the U-shaped frame (31). An adaptive clamping plate (327) is slidably connected to the two downward ends of the three-end slide rail (322). A first hydraulic telescopic rod (323) is provided at the axis of the three-end slide rail (322). A hexagonal connecting sleeve (325) is fixedly connected to the telescopic end of the first hydraulic telescopic rod (323). A connecting rod (326) is hinged between the hexagonal connecting sleeve (325), the L-shaped top plate (324), and the adaptive clamping plate (327). The U-shaped frame (31) includes a U-shaped frame body (311). The sealed end of the U-shaped frame body (311) is provided with a cavity (312) for the slider (321) to slide up and down. The U-shaped frame body (311) is provided with a through groove (313) for the slider (321) to move up and down at the connection between the three-end slide rail (322). The cavity (312) is provided with a spring that causes the slider (321) to move upward. The bottom of the adaptive clamping plate (327) is hinged with a roller (328). The bottom of the roller (328) is fixedly installed with a pressure plate (329). There is a gap between the pressure plate (329) and the adaptive clamping plate (327). The bottom of the adaptive clamping plate (327) is provided with a groove for the roller (328) to rotate.

2. The auxiliary hoisting device for offshore wind turbine generators according to claim 1, characterized in that: The bottom support device (33) includes a second hydraulic telescopic rod (334) fixedly installed at the bottom of the sealing end of the U-shaped frame (311). A first shaft frame (333) is fixedly installed at the telescopic end of the second hydraulic telescopic rod (334). A support plate (331) is hinged on the first shaft frame (333). A pad (332) is provided at the top of the support plate (331) away from the first shaft frame (333). A roller (314) for sliding at the bottom of the support plate (331) is hinged at the lower end of the U-shaped frame (311).

3. The auxiliary hoisting device for offshore wind turbine generators according to claim 1, characterized in that: The connecting bridge (1) includes a bridge body (11), a second shaft frame (12) is provided on the bridge body (11), a hoisting main rod (14) is hinged on the second shaft frame (12), a rotating machine (13) is hinged to the top of the hoisting main rod (14), and a lifting lug (16) is provided on the top of the rotating machine (13).

4. The auxiliary hoisting device for offshore wind turbine generators according to claim 3, characterized in that: A third hydraulic telescopic rod (15) is hinged between the hoisting main rod (14) and the bridge body (11).

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