Lifting and assembly device for wind turbines

Abstract

Lifting and assembly device for wind turbines, characterized in that the wind turbine comprises a tower (4), a nacelle (7) and rotor blades (6); wherein several towers (4) are provided, which are successively connected at the assembly position via the lifting and assembly device in the assembly state; the nacelle (7) is provided on the tower (4) and the nacelle (7) has at least three mounting holes (71); the rotor blades (6) are positioned at the mounting holes (71) via the lifting and assembly device; the lifting and assembly device can be operated in a first state and a second state, wherein in the first state it is designed for lifting and assembling the tower (4) and in the second state it is designed for lifting and assembling the rotor blades (6); the lifting and assembly device comprises a lifting and assembly component (1), a lifting frame (2) and a tilting unit (3) connected to the lifting frame (2);the lifting frame (2) is rotatably connected to the lifting cable of the lifting and assembly component (1); the tilting unit (3) comprises a load-bearing plate (31), a tilting plate (32), a clamping and tensioning component (33) and a traction component (34); the load-bearing plate (31) is connected to the lifting frame (2); the tilting plate (32) is rotatably connected to the load-bearing plate (31) via the traction component (34); the clamping and tensioning component (33) comprises a clamping and tensioning plate (331), a drive element (332) and several clamping and tensioning blocks (333); the clamping and tensioning plate (331) is rotatably connected to one side of the tilting plate (32); several clamping and clamping blocks (333) are slidably connected to the clamping and clamping plate (331) via the drive element (332), and the outer circumference of the tower (4) has an annular projection (41); the clamping and clamping blocks (333) have clamping and clamping grooves (3331) that are adapted to the annular projection (41);In the first state, the traction component (34) drives the tilting plate (32) to move, so that the tower (4) located on the tilting plate (32) moves; and the drive element (332) drives the clamping and clamping blocks (333) to move, so that the clamping and clamping blocks (333) engage with and are attached to the annular projection (41); the lifting and assembly device further comprises at least two clamping units (5); the clamping unit (5) comprises a clamping plate (51), a rotary component (52) and a clamping component (53); the clamping plate (51) is rotatably connected to the load-bearing plate (31); in the second state, the rotary component (52) changes the angle between the clamping plate (51) and the load-bearing plate (31), so that the clamping component (53) can clamp the rotor blades; the rotary component (52) comprises a rotary motor (521), a first gear (522) and a second gear (523);the first gear (522) is rotatably connected to the load-bearing plate (31) via the rotary motor (521); the second gear (523) is rotatably connected to the axis of rotation of the clamping plate (51) and the load-bearing plate (31), wherein the first gear (522) and the second gear (523) mesh; the rotary motor (521) is designed to drive the rotation of the first gear (522).

Description

TECHNICAL AREA

[0001] The present application concerns the field of wind turbine technology, in particular a lifting and assembly device for wind turbines. STATE OF THE ART

[0002] As part of sustainable development, wind energy generation is experiencing increased growth. However, the challenge of reducing the lifting and assembly costs of wind turbines while maintaining efficiency in this process remains a critical issue that requires a solution.

[0003] In related technologies, the assembly steps for a wind turbine generally proceed as follows: A transport vehicle first delivers the wind turbine components (such as the tower and rotor blades) to the assembly site. The tower is then lifted and assembled using a lifting and assembly device. A further lifting and assembly device is required to guide the tower's movement. Once the tower has been moved from a horizontal to a vertical orientation, it is lifted into its assembly position. After the tower lifting and assembly process is complete, the lifting and assembly tool on the device is changed to lift and assemble the rotor blades, which are then also moved into their assembly position.

[0004] The technologies mentioned above have the following technical disadvantages when lifting and assembling wind turbines: Firstly, the need for multiple lifting and assembly devices not only increases the cost of the wind turbine lifting and assembly process, but also complicates the lifting and assembly work when space at the wind turbine assembly site is limited; Secondly, changing the lifting and assembly tool after lifting and assembling the tower before lifting and assembling the rotor blades increases the number of work steps for lifting and assembling the wind turbine, thus significantly reducing the efficiency of the lifting and assembly process. CONTENT OF THE PRESENT APPLICATION

[0005] In order to reduce the costs of the lifting and assembly process of the wind turbine and to increase the efficiency of lifting and assembling the wind turbine, the present application provides for a lifting and assembly device for wind turbines.

[0006] The lifting and assembly device for wind turbines provided for in the present application is based on the following technical solution: A lifting and assembly device for wind turbines, characterized in that the wind turbine comprises a tower, a nacelle, and rotor blades; wherein several towers are provided, which are successively connected at the assembly position via the lifting and assembly device in the assembly state; the nacelle is provided on the tower and the nacelle has at least three mounting holes; the rotor blades are positioned at the mounting holes via the lifting and assembly device; the lifting and assembly device can be operated in a first state and a second state, wherein in the first state it is designed for lifting and assembling the tower and in the second state it is designed for lifting and assembling the rotor blades; the lifting and assembly device comprises a lifting and assembly component, a lifting frame, and a tilting unit connected to the lifting frame;the lifting frame is rotatably connected to the lifting cable of the lifting and assembly component; the tilting unit comprises a load-bearing plate, a tilting plate, a clamping and tensioning component, and a traction component; the load-bearing plate is connected to the lifting frame; the tilting plate is rotatably connected to the load-bearing plate via the traction component; the clamping and tensioning component comprises a clamping and tensioning plate, a drive element, and several clamping and tensioning blocks; the clamping and tensioning plate is rotatably connected to one side of the tilting plate; several clamping and tensioning blocks are slidably connected to the clamping and tensioning plate via the drive element, and the outer circumference of the tower has an annular projection; the clamping and tensioning blocks have clamping and tensioning grooves that are adapted to the annular projection; in the first state, the traction component drives the tilting plate to move, so that the tower located on the tilting plate moves;and the drive element drives the clamping and clamping blocks to move them, so that the clamping and clamping blocks engage with and are attached to the annular projection; the lifting and assembly device further comprises at least two clamping units; the clamping unit comprises a clamping plate, a rotary component and a clamping component; the clamping plate is rotatably connected to the load-bearing plate, in the second state the rotary component changes the angle between the clamping plate and the load-bearing plate so that the clamping component can clamp the rotor blades; the rotary component comprises a rotary motor, a first gear and a second gear; the first gear is rotatably connected to the load-bearing plate via the rotary motor; the second gear is rotatably connected to the axis of rotation of the clamping plate and the load-bearing plate, the first gear and the second gear meshing with each other;the rotary motor is designed to drive the rotation of the first gear.;

[0007] By applying the aforementioned technical solution, the assembly of a wind turbine begins with the vertical fixing of a tower at its mounting position. Subsequently, several towers are connected and fixed sequentially using the same steps. After the towers are securely connected, the nacelle is mounted on the tower. Following the nacelle's installation, the rotor blades are maneuvered into position at the mounting holes and firmly attached to the nacelle. This completes the wind turbine assembly. To lift and mount the tower, the lifting and assembly device is set to its initial position. The lifting and assembly component then drives the lifting frame, which in turn moves the tilting unit into the tower's tilting position (the gap between the tower and its transport vehicle). Once the personnel have positioned the tilting unit correctly, the tilting plate is placed directly beneath the tower.The traction component is then activated, setting the tilting plate in motion. This movement causes the tower above it to move. Simultaneously, the clamping and tensioning plate tilts to the end of the tower. The drive element is activated, moving the clamping and tensioning blocks so that they approach the annular projection and engage with it, securing the tower. Further adjustment of the traction component causes the tower to tilt gradually. Activating the lifting and assembly component raises the lifting frame. As the lifting and assembly component is raised, the tower gradually aligns itself vertically.After the tower is fully raised, the lifting and assembly component lowers the vertically aligned tower into its assembly position, thus completing the tower assembly. The integrated tilting unit allows the tower to be tilted, gradually reducing the gravitational load during the lifting process. Compared to prior art, this eliminates the need for multiple additional lifting and assembly devices, reducing the cost of lifting and assembling the tower. Simultaneously, the clamping and tensioning component secures the tower during the lifting and assembly process, preventing displacement or loosening and increasing the stability of the assembly. If lifting and assembling a rotor blade is required, the lifting and assembly device is moved to its second position.By switching on the rotary motor, the rotary motor drives the first gear to rotate, which in turn drives the second gear to rotate. The rotation of the second gear causes the clamping plate to rotate on the load-bearing plate, aligning the clamping plate and load-bearing plate vertically. The lifting and assembly component transports the lifting frame to the clamping position of the rotor blade. The clamping unit moves to the lifting and assembly position of the rotor blade. The clamping component is switched on, clamping the rotor blade. The lifting and assembly component then transports the clamped rotor blade to the assembly position, where the rotor blade is mounted. The angle between the clamping plate and the load-bearing plate can be changed using the provided rotary component. This allows the configuration of the lifting and assembly device to be switched to the second state.In combination with the clamping component, the rotor blade can be clamped in place – in this way, the lifting and assembly device of the present application can simultaneously lift and assemble both towers and rotor blades. This means that after the lifting and assembly process of the towers is complete, the lifting and assembly device can directly begin lifting and assembling the rotor blades by adjusting its position. Compared to the prior art, this helps to reduce the need for changing lifting and assembly tools when lifting and assembling different objects (towers and rotor blades).On the one hand, the need to manufacture additional different lifting and assembly equipment is eliminated, thus reducing the costs of lifting and assembling wind turbines; on the other hand, the number of work steps for changing lifting and assembly tools for lifting and assembling different objects is reduced, which increases the efficiency of lifting and assembling wind turbines.

[0008] Optionally, the traction component includes a traction motor, a reduction gear, a first connecting rod, and a second connecting rod; the reduction gear is provided on the load-bearing plate, and the traction motor is designed to drive the reduction gear to rotate; the first connecting rod is connected to the output end of the reduction gear; the second connecting rod is rotatably connected to the end of the first connecting rod facing away from the reduction gear, the axial direction of the output end of the reduction gear corresponding to the axial direction of the axis of rotation between the first connecting rod and the second connecting rod; the tilting plate is hinged to the other end of the second connecting rod.

[0009] By employing the aforementioned technical solution, the traction motor is engaged when the turret is to be tilted. The traction motor drives the reduction gear to rotate. The rotation of the reduction gear drives the first connecting rod, which in turn drives the second connecting rod. The movement of the second connecting rod then drives the tilting plate. The tilting plate moves on the load-bearing plate and drives the turret to move. This causes the turret to tilt.

[0010] Optionally, the traction component further includes a limiting element; the limiting element comprises an arc-shaped block and a limiting rod; the arc-shaped block is provided on the load-bearing plate and the arc-shaped block has a limiting groove; one end of the limiting rod is connected to the axis of rotation of the tilting plate and the load-bearing plate, while the other end of the limiting rod projects into the limiting groove and is slidably connected to the side wall of the limiting groove.

[0011] By applying the aforementioned technical solution, the tilting plate is tilted on the load-bearing plate. The axis of rotation between the tilting plate and the load-bearing plate drives the movement of the limiting bar; the other end of the limiting bar moves within the arc-shaped block. The arc-shaped block limits the path of movement of the limiting bar, thereby ensuring a stable tilting motion of the tilting plate and thus increasing the stability of the tower's tilting process.

[0012] Optionally, the drive element comprises a bidirectional drive spindle, a drive bevel gear, an output bevel gear, and a drive motor; the bidirectional drive spindle is rotatably connected to the clamping and clamping plate, the bidirectional drive spindle comprising a right-hand threaded section, a left-hand threaded section, and a central straight section, with several clamping and clamping blocks provided on the right-hand threaded section and the left-hand threaded section, and the clamping and clamping blocks being slidably connected to the clamping and clamping plate; the output bevel gear is provided on the central straight section; the drive bevel gear is rotatably connected to the clamping and clamping plate by means of the drive motor, and the drive bevel gear and the output bevel gear mesh with each other; the drive motor is designed to drive the rotation of the drive bevel gear.

[0013] By employing the aforementioned technical solution, the drive motor is switched on when the tower needs to be fixed in place. The drive motor then rotates the input bevel gear, which in turn drives the output bevel gear. The output bevel gear drives the bidirectional drive spindle, and the rotation of the bidirectional drive spindle drives the clamping and locking blocks. As the clamping and locking blocks approach each other, they engage with and are secured to the annular projection to fix the tower in position. This helps to minimize tower movement during the lifting and assembly process. Once the tower is lifted and installed into position, the drive motor is switched on. The drive motor then rotates the input bevel gear, which in turn drives the output bevel gear.The output bevel gear drives the bidirectional drive spindle, which in turn powers the movement of the clamping and clamping blocks. As the clamping and clamping blocks move further apart, the tower gradually lowers on the tilting plate into its assembly position, thus facilitating subsequent assembly work.

[0014] Optionally, the clamping plate has a clamping slot in which the clamping component is provided; the clamping component comprises a lower clamping block, a lateral pressure block, and several upper clamping blocks; the lower clamping block is slidably connected to the clamping plate; the several upper clamping blocks are provided on a side wall of the clamping slot, the upper clamping blocks and the lower clamping block together form a clamping space for the rotor blade, and the distance between the several upper clamping blocks and the lower clamping block is variable; the lateral pressure block is provided on a side wall of the clamping slot so that the lateral pressure block can be pressed against the side wall of the rotor blade.

[0015] By applying the aforementioned technical solution, the lifting and assembly component transports the lifting frame to the rotor blade clamping position. The operator then adjusts the lifting frame so that the rotor blade enters the clamping slot, the underside of the blade contacts the lower clamping block, and a side wall of the blade contacts the lateral pressure block. Simultaneously, various upper clamping blocks are individually adjusted at different points along the rotor blade according to its curvature. This ensures secure clamping and fixing of the rotor blade while maximizing blade protection during the clamping process. Once the rotor blade is clamped, the lifting and assembly component transports the clamped blade to the assembly position, where the subsequent blade assembly work takes place.

[0016] Optionally, the clamping component includes an adjustment element for driving the movement of the lower clamping block; the adjustment element comprises an adjustment motor, an adjustment screw, and an adjustment block; the adjustment screw is rotatably connected to the clamping plate, the axial direction of the adjustment screw being perpendicular to the stroke direction of the lifting and assembly component; the adjustment block is screwed to the adjustment screw and is slidably connected to a side wall of the clamping slot, and the lower clamping block is connected to the adjustment block; the adjustment motor is designed to drive the rotation of the adjustment screw.

[0017] By applying the aforementioned technical solution, the adjustment motor is activated when rotor blades with different specifications are clamped. The adjustment motor drives the adjustment screw, which in turn drives the adjustment block, causing it to move on the clamping plate. The movement of the adjustment block drives the lower clamping block, allowing the optimal clamping positions for rotor blades with different specifications to be set. This improves the clamping effect on the rotor blades.

[0018] Optionally, the clamping component further includes a drive element for actuating the lateral pressure block to bring it closer to the rotor blade; the drive element comprises a drive gear, a drive rack and a drive motor; the drive gear is rotatably connected to the clamping plate via the drive motor; the drive rack is slidably connected to the tilting plate, the lateral pressure block is provided on the drive rack; the drive gear and the drive rack mesh with each other; the drive motor is designed to drive the rotation of the drive gear.

[0019] By applying the aforementioned technical solution, the drive motor is activated when the rotor blade is in the clamping slot. The drive motor rotates the drive gear, which in turn rotates the drive rack. The drive rack then moves the lateral pressure block. The lateral pressure block moves to the side of the rotor blade, making contact with it and thus limiting and fixing the blade's position. This prevents the rotor blade from shifting during the lifting and assembly process, thereby improving the clamping effect on the rotor blade.

[0020] Optionally, the clamping and tensioning block is designed in an arc shape, and the curvature of the clamping and tensioning block corresponds to the curvature of the tower.

[0021] By applying the aforementioned technical solution, the clamping and tensioning block is designed in an arc shape, the curvature of which corresponds to that of the tower. This allows the clamping and tensioning block to fully engage with and be attached to the tower's annular projection, thereby improving the clamping and fixing effect on the tower. This ensures the tower's stability during the lifting and assembly process.

[0022] In summary, the present application includes at least one of the following advantageous technical effects: 1. The provided tilting unit allows the tower to be tilted, thus gradually reducing the gravitational load during the lifting process. Compared to the prior art, this eliminates the need for multiple additional lifting and assembly devices, thereby reducing the costs of lifting and assembling the tower. Simultaneously, the clamping and tensioning component secures the tower during the lifting and assembly process, preventing displacement or loosening and increasing the stability of the tower assembly. 2. The drive motor is switched on. The drive motor then rotates the drive bevel gear, which in turn rotates the output bevel gear. The output bevel gear rotates the bidirectional drive spindle, and the rotation of the bidirectional drive spindle drives the clamping blocks to move. As the clamping blocks approach each other, they engage with and are secured to the annular projection to fix the turret. This helps to minimize turret movement during the turret lifting and assembly process. After the turret is lifted and installed into the assembly position, the drive motor is switched on. The drive motor rotates the drive bevel gear, which in turn rotates the output bevel gear. The output bevel gear rotates the bidirectional drive spindle, whose rotation drives the movement of the clamping blocks.As the clamping and tensioning blocks move further apart, the tower gradually lowers onto the tilting plate into the assembly position, thus facilitating the subsequent assembly work for the tower. 3. The angle between the clamping plate and the load-bearing plate can be changed using the provided rotary component. This allows the lifting and assembly device to be converted to its second state. In combination with the clamping component, the rotor blade can be clamped in place. In this way, the lifting and assembly device of the present application can simultaneously lift and assemble both towers and rotor blades. That is, after the tower lifting and assembly process is complete, the lifting and assembly device can directly begin lifting and assembling the rotor blades by adjusting its position. Compared to the prior art, this helps to reduce the need for changing lifting and assembly tools when lifting and assembling different objects (towers and rotor blades).On the one hand, the need to manufacture additional different lifting and assembly tools is eliminated, thus reducing the costs of lifting and assembling wind turbines; on the other hand, the number of work steps for changing lifting and assembly tools for lifting and assembling different objects is reduced, which increases the efficiency of lifting and assembling wind turbines. BRIEF DESCRIPTION OF THE DRAWING

[0023] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings necessary for describing these embodiments are briefly presented below. It is understood that the drawings described below represent only some embodiments of the present application. Those skilled in the field can derive further drawings from these without any creative effort. Fig. Figure 1 is a schematic structural representation of a lifting and assembly device for wind turbines in the first position according to the present application. Fig. Figure 2 is a schematic structural representation of a lifting and assembly device for wind turbines in the second position according to the present application. Fig. Figure 3 is a first schematic representation of part of the structure of a lifting and assembly device for wind turbines according to the present application. Fig. Figure 4 is an enlarged view of part A. Fig. 2. Fig. Figure 5 is an enlarged view of part B from Fig. Fig. 3. Fig. Figure 6 is a second schematic representation of part of the structure of a lifting and assembly device for wind turbines according to the present application. Fig. Figure 7 is an enlarged view of part C from Fig. 6. Fig. Figure 8 is an enlarged view of part D from Fig. 6. Fig. Figure 9 is an enlarged view of part E from Fig. 6. Fig. Figure 10 is a third schematic representation of part of the structure of a lifting and assembly device for wind turbines according to the present application. Fig. 11 is a sectional view of Fig. 10. Fig. 12 is an enlarged view of part F from Fig. 11. Fig. Figure 13 is a schematic structural representation of a wind turbine according to the present application. Fig. 14 is an enlarged view of part G from Fig. 3. Fig. Figure 15 is a fourth schematic representation of part of the structure of a lifting and assembly device for wind turbines.

[0024] Reference numeral list: 1. Lifting and assembly component; 2. Lifting frame; 3. Tilting unit; 31. Load-bearing plate; 32. Tilting plate; 33. Clamping and clamping component; 331. Clamping and clamping plate; 332. Drive element; 3321. Bidirectional drive spindle; 33211. Right-hand thread section; 33212. Left-hand thread section; 33213. Middle straight section; 3322. Drive bevel gear; 3323. Output bevel gear; 3324. Drive motor; 333. Clamping and clamping block; 3331. Clamping and clamping groove; 34. Traction component; 341. Traction motor; 342. Reduction gear; 343. First connecting rod; 344. Second connecting rod; 345. Limiting element; 3451. Arc-shaped block; 34511. Limiting groove; 3452. Limiting rod; 4. Tower; 41. Ring-shaped projection; 5. Clamping unit; 51. Clamping plate; 511. Clamping slot; 52. Rotary component; 521. Rotary motor; 522. First gear; 523. Second gear; 53. Clamping component; 531. Lower clamping block; 532. Upper clamping block; 5321. Lower actuating cylinder; 533. Side pressure block; 534.Adjustment element; 5341. Adjustment motor; 5342. Adjustment screw; 5343. Adjustment block; 535. Drive piece; 5351. Drive gear; 5352. Drive rack; 5353. Drive motor; 54. Motion component; 541. Drive gear; 542. Output gear; 543. Motion motor; 6. Rotor blade; 7. Nacelle; 71. Mounting holes. DETAILED DESCRIPTION

[0025] The present application will be referred to below with reference to Fig. 1-15 explained in more detail.

[0026] One embodiment of the present application discloses a lifting and assembly device for wind turbines.

[0027] In a lifting and assembly device for wind turbines, a wind turbine comprises a tower 4, a nacelle 7, and rotor blades 6; wherein several towers 4 are provided, which are connected sequentially at the assembly position during assembly; the nacelle 7 is provided on the tower 4 and the nacelle 7 has at least three mounting holes 71; the rotor blades 6 are each positioned at the mounting holes 71. It should be noted that in the embodiments of the present disclosure, the number of towers 4 is not specifically limited. Depending on the specific construction requirements, a different number of towers 4 can be selected.

[0028] With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 13 is a lifting and assembly device for wind turbines, designed for lifting and assembling a wind turbine. The lifting and assembly device can be operated in a first state and a second state, in the first state being designed for lifting and assembling the tower 4 and in the second state being designed for lifting and assembling the rotor blades 6; the lifting and assembly device comprises a lifting and assembly component 1, a lifting frame 2, a tilting unit 3 connected to the lifting frame 2, and a clamping unit 5 connected to the tilting unit 3; the lifting frame 2 is rotatably connected to the lifting cable of the lifting and assembly component 1. The tilting unit 3 is designed for tilting the tower 4, which is placed on the transport vehicle, so that the tower 4 can be moved from a horizontal to a vertical orientation.This facilitates the lifting and assembly of the tower 4 without the need for multiple lifting and assembly devices to support the raised tower 4, thus reducing the lifting and assembly costs for the wind turbine. The clamping unit 5 is designed to clamp the rotor blades 6. By adjusting the lifting and assembly device, it is brought into the second state, thereby enabling the lifting and assembly of the rotor blades 6. It should be noted that, in the present application, at least two clamping units 5 may be provided to increase the clamping effect on the rotor blades 6, and that the number of clamping units 5 is not specifically limited. The accompanying drawings of the present application illustrate this by means of an example with two clamping units 5.

[0029] Particularly when it is necessary to tilt the tower 4, the lifting frame 2 can be set in motion by the lifting and assembly component 1. Under the guidance of personnel, the tilting unit 3 is maneuvered into the gap between the tower 4 and its transport vehicle. Subsequently, the tilting process of the tower 4 is carried out by adjusting the tilting unit 3.

[0030] With reference to Fig. 3, Fig. 7, Fig. 10, Fig. 11 and Fig. 14 The tilting unit 3 comprises a load-bearing plate 31, a tilting plate 32, a clamping and tensioning component 33, and a traction component 34; the load-bearing plate 31 is connected to the lifting frame 2; the tilting plate 32 is rotatably connected to the load-bearing plate 31 via the traction component 34, wherein, in one embodiment of the present disclosure, the axial direction of the axis of rotation between the tilting plate 32 and the load-bearing plate 31 is perpendicular to the lifting direction of the lifting and assembly component 1; the clamping and tensioning component 33 comprises a clamping and tensioning plate 331, a drive element 332, and several clamping and tensioning blocks 333; The clamping and tensioning plate 331 is rotatably connected to one side of the tilting plate 32, wherein the axial direction of the axis of rotation between the clamping and tensioning plate 331 and the tilting plate 32 is identical to the axial direction of the axis of rotation between the tilting plate 32 and the load-bearing plate 31;Several clamping and clamping blocks 333 are slidably connected to the clamping and clamping plate 331 via the drive element 332, and the outer circumference of the tower 4 has an annular projection 41; the clamping and clamping blocks 333 have clamping and clamping grooves 3331 that are adapted to the annular projection 41; in the first state, the traction component 34 drives the tilting plate 32 to move, so that the tower 4 located on the tilting plate 32 moves;The drive element 332 drives the clamping and clamping blocks 333 to move, so that the clamping and clamping blocks 333 engage with and are attached to the annular projection 41. In particular, when the traction component 34 drives the tilting plate 32 to move, the tilting plate 32 drives the tower 4 located on it to tilt. At the same time, the clamping and clamping plate 331 is adjusted to tilt, so that the clamping and clamping plate 331 moves towards the end of the tower 4. In doing so, the drive element 332 drives the clamping and clamping blocks 333 to move, so that the clamping and clamping blocks 333 engage with and are attached to the annular projection 41, thus enabling a fixation between the tower 4 and the clamping and clamping plate 331.

[0031] It should be noted that in one embodiment of the present disclosure, the lifting direction of the lifting and assembly component 1 refers to the direction along the lifting cable (the lifting and assembly component 1 has a lifting cable).

[0032] In some embodiments of the present disclosure, the clamping and clamping block 333 is arc-shaped, and the curvature of the clamping and clamping block 333 corresponds to the curvature of the tower 4. This arrangement allows the clamping and clamping blocks 333 to engage with and be attached to the annular projection 41, thereby increasing the securing effect on the tower 4 and thus improving the stability during the lifting and assembly process of the tower 4.

[0033] In some embodiments of the present disclosure, reference can be made to Fig. 3 and Fig. 9 The lifting and assembly device further comprises a motion component 54 for driving the clamping and clamping plate 331 to rotate on the load-bearing plate 31; the motion component 54 comprises a drive gear 541, an output gear 542 and a motion motor 543; wherein the output gear 542 is provided on the axis of rotation which connects the clamping and clamping plate 331 and the load-bearing plate 31, the drive gear 541 is rotatably connected to the load-bearing plate 31, the drive gear 541 and the output gear 542 mesh with each other and the motion motor 543 is designed such that it drives the drive gear 541 to rotate.

[0034] With reference to Fig. 3, Fig. 6 and Fig. 7 The traction component 34 comprises a traction motor 341, a reduction gear 342, a first connecting rod 343 and a second connecting rod 344; the reduction gear 342 is mounted on the load-bearing plate 31, the output end of the traction motor 341 is connected to the reduction gear 342, and the traction motor 341 is designed to drive the reduction gear 342 to rotate; the first connecting rod 343 is connected to the output end of the reduction gear 342;the second connecting rod 344 is rotatably connected to the end of the first connecting rod 343 facing away from the reduction gear 342, wherein the axial direction of the output end of the reduction gear 342 corresponds to the axial direction of the axis of rotation between the first connecting rod 343 and the second connecting rod 344 (it is understood that in an embodiment of the present disclosure the axial direction of the output axis of the reduction gear 342 is perpendicular to the direction of the lifting cable of the lifting and assembly component 1);The tilting plate 32 is articulated at the other end of the second connecting rod 344. When the tilting plate 32 is to be driven to move, the traction motor 341 rotates and thus drives the reduction gear 342 to rotate. The rotation of the reduction gear 342 drives the first connecting rod 343 to move, and the first connecting rod 343 in turn drives the second connecting rod 344 to move. The second connecting rod 344 then drives the tilting plate 32 to move, thus causing the tilting plate 32 to tilt. It should be noted that the traction motor 341 rotates and thus drives the reduction gear 342 to rotate, and the rotation of the reduction gear 342 sets the first connecting rod 343 into a reciprocating motion. Similarly, the reciprocating motion of the first connecting rod 343 sets the second connecting rod 344 into a reciprocating motion. The movement of the second connecting rod 344 causes the tilting plate 32 to move.

[0035] With reference to Fig. 3 and Fig. 4 The traction component 34 in some embodiments of the present disclosure further comprises a limiting element 345 for limiting the path of movement of the tilting plate 32 and for preventing unsafe accidents due to excessive tilting amplitude of the tilting plate 32; the limiting element 345 comprises an arc-shaped block 3451 and a limiting rod 3452; the arc-shaped block 3451 is mounted on the load-bearing plate 31 and the arc-shaped block 3451 has a limiting groove 34511; one end of the limiting rod 3452 is connected to the axis of rotation of the tilting plate 32 and the load-bearing plate 31, while the other end of the limiting rod 3452 projects into the limiting groove 34511 and is slidably connected to the side wall of the limiting groove 34511.During the tilting movement of the tilting plate 32, the pivot axis between the tilting plate 32 and the load-bearing plate 31 drives the limiting rod 3452 to move it, and the other end of the limiting rod 3452 slides along the side wall of the limiting groove 34511. As soon as the limiting rod 3452 reaches a certain position, its movement is stopped by the action of the limiting block. The tilting plate 32 then stops tilting, thus limiting its path of movement.

[0036] With reference to Fig. 3, Fig. 11 and Fig. 12 In some embodiments of the present disclosure, the drive element 332 comprises a bidirectional drive spindle 3321, a drive bevel gear 3322, an output bevel gear 3323 and a drive motor 3324; the bidirectional drive spindle 3321 is rotatably connected to the clamping and clamping plate 331, wherein the bidirectional drive spindle 3321 comprises a right-hand threaded section 33211, a left-hand threaded section 33212 and a central straight section 33213, several clamping and clamping blocks 333 are screwed to the right-hand threaded section 33211 and the left-hand threaded section 33212 respectively, and the clamping and clamping blocks 333 are slidably connected to the clamping and clamping plate 331; the output bevel gear 3323 is attached to the central straight section 33213 via a keyway connection;The drive bevel gear 3322 is rotatably connected to the clamping and clamping plate 331 by means of the drive motor 3324, and the drive bevel gear 3322 and the output bevel gear 3323 mesh together; the drive motor 3324 is designed to drive the rotation of the drive bevel gear 3322 (see ; Fig. 15). With reference to Fig. 3, Fig. 5, Fig. 8 and Fig. The clamping unit 5 comprises a clamping plate 51, a rotary component 52, and a clamping component 53; the clamping plate 51 is rotatably connected to the load-bearing plate 31 via the rotary component 52. In the second state, the rotary component 52 changes the angle between the clamping plate 51 and the load-bearing plate 31, so that the clamping component 53 can clamp the rotor blades 6.

[0037] With reference to Fig. 3, Fig. 8 and Fig. 13 The rotary component 52 comprises a rotary motor 521, a first gear 522, and a second gear 523; the first gear 522 is rotatably connected to the load-bearing plate 31 via the rotary motor 521; the second gear 523 is rotatably connected to the axis of rotation of the clamping plate 51 and the load-bearing plate 31, with the first gear 522 and the second gear 523 meshing; the rotary motor 521 is designed to drive the rotation of the first gear 522, and the axial direction of the output axis of the rotary motor 521 is perpendicular to the lifting direction of the lifting and assembly component 1. In particular, when the lifting and assembly device is in the second state, the rotary motor 521 drives the first gear 522 to rotate. The first gear 522 then drives the second gear 523 to rotate, causing the clamping plate 51 to tilt under the action of the second gear 523. In this position, the lifting and mounting device is in a clamping position for the rotor blades 6.

[0038] With reference to Fig. 3, Fig. 5, Fig. 6, Fig. 7 and Fig. In section 13, the clamping plate 51 is open with a clamping slot 511, in which the clamping component 53 is mounted; the clamping component 53 is designed for clamping the rotor blades 6. It is understood that, when clamping a rotor blade 6 is required, the lifting frame 2 can be set in motion by the lifting and assembly component 1. Under the guidance of personnel, the clamping unit 5 is then moved to the position of the rotor blade 6. With the aid of the lifting frame 2, the clamping plate 51 is brought close to the rotor blade 6 so that the rotor blade 6 can be inserted into the clamping slot 511. Subsequently, the rotor blade 6 is clamped by adjusting the clamping component 53.

[0039] With reference to Fig. 3, Fig. 5, Fig. 6, Fig. 7 and Fig. 13 The clamping component 53 comprises a lower clamping block 531, a lateral pressure block 533 and several upper clamping blocks 532; the lower clamping block 531 is slidably connected to the clamping plate 51, the direction of movement of the lower clamping block 531 being perpendicular to the lateral direction of the rotor blade 6 (it is understood that in an embodiment of the present disclosure the rotor blade 6 is elongated and slender; the direction from one end of the rotor blade 6 to its other end is defined as the longitudinal direction, and the direction perpendicular to this longitudinal direction is defined as the lateral direction).Thus, the optimal clamping position for the rotor blade 6 can be determined by continuously moving the lower clamping block 531; several upper clamping blocks 532 are movably mounted on a side wall of the clamping slot 511. The upper clamping blocks 532 and the lower clamping block 531 together form a clamping chamber for the rotor blade 6, and the distance between the several upper clamping blocks 532 and the lower clamping block 531 is variable. This allows the distance between the upper clamping blocks 532 and the lower clamping block 531 to be changed according to the different curvatures of the rotor blade 6, thereby further improving the clamping effect on the rotor blade 6. The lateral pressure block 533 can be movably mounted on a side wall of the clamping slot 511 so that the lateral pressure block 533 can be pressed against the side wall of the rotor blade 6.This achieves a multidirectional fixation of the rotor blade 6 by means of the upper clamping blocks 532, the lower clamping block 531 and the lateral pressure block 533. This further increases the clamping effect on the rotor blade 6.

[0040] With reference to Fig. 5, Fig. 6, Fig. 7 and Fig. In some embodiments of the present disclosure, the clamping component 53 comprises an adjusting element 534 for driving the movement of the lower clamping block 531; the adjusting element 534 comprises an adjusting motor 5341, an adjusting screw 5342 and an adjusting block 5343; the adjusting screw 5342 is rotatably connected to the clamping plate 51, the axial direction of the adjusting screw 5342 being perpendicular to the stroke direction of the lifting and assembly component 1; the adjusting block 5343 is screwed to the adjusting screw 5342, the adjusting block 5343 is slidably connected to a side wall of the clamping slot 511 and the lower clamping block 531 is connected to the adjusting block 5343; the adjusting motor 5341 is configured to drive the rotation of the adjusting screw 5342. Therefore, if it becomes necessary to move the lower terminal block 531, the adjusting motor 5341 is switched on.The adjusting motor 5341 drives the adjusting screw 5342 to rotate, and the adjusting screw 5342 in turn drives the movement of the adjusting block 5343. The movement of the adjusting block 5343 then drives the lower clamping block 531 to move, thus achieving the objective of driving the lower clamping block 531 to move. This facilitates finding the optimal clamping position for the rotor blade 6.

[0041] With reference to Fig. 5, Fig. 6, Fig. 7 and Fig.13 In some embodiments of the present disclosure, the clamping component 53 further comprises a drive element 535 for driving the lateral pressure block 533 to approach the rotor blade 6; the drive element 535 comprises a drive gear 5351, a drive rack 5352 and a drive motor 5353; the drive gear 5351 is rotatably connected to the clamping plate 51 via the drive motor 5353; the drive rack 5352 is slidably connected to the tilting plate 32, the lateral pressure block 533 is provided on the drive rack 5352; the drive gear 5351 and the drive rack 5352 mesh with each other; the drive motor 5353 is designed to drive the rotation of the drive gear 5351.

[0042] Furthermore, the lateral pressure block 533 can be made of a flexible material, and the side of the lateral pressure block 533 facing the rotor blade 6 can have projections (not specifically indicated in the drawings of the present application). Thus, the projections formed on the lateral pressure block 533 serve not only to laterally limit the rotor blade 6, but also to distribute some of the stress between the rotor blade 6 and the lateral pressure block 533 during the lifting and assembly process of the rotor blade 6. This ensures the stability of the rotor blade 6 during the lifting and assembly process. The present application may also provide for a lifting and assembly method for wind turbines, comprising the following lifting and assembly steps: S1: Assembly of a tower 4; S11: Tilting of the tower 4; the lifting and assembly component 1 is switched on, so that the lifting and assembly component 1 drives the lifting frame 2 to move, the movement of the lifting frame 2 drives the tilting unit 3 to move, and the tilting unit 3 is transported to the position where the tower 4 can be tilted (the tilting unit 3 is located in the gap between the tower 4 and the transport vehicle; it is understood that the tower 4 is delivered to the construction site via the transport vehicle; in relevant technologies, the middle section of the tower 4 remains suspended at the storage position on the transport vehicle, thus forming a gap between the suspended section and the support surface of the transport vehicle to prevent damage to the tower 4 from direct contact between the tower 4 and the transport vehicle). The clamping and tensioning plate 331 is then driven to move, so that the clamping and tensioning plate 331 is tilted towards the end of the tower 4.By adjusting the drive motor 3324, the drive bevel gear 3322 is rotated by the drive motor 3324, which then drives the output bevel gear 3323 to rotate. This rotates the bidirectional drive spindle 3321, which in turn drives the clamping and clamping blocks 333 to move. The clamping and clamping blocks 333 then approach the tower 4, so that the annular projection 41 is inserted into the clamping and clamping grooves 3331, and the clamping and clamping blocks 333 engage with and are secured to the annular projection 41. The traction component 34 is then engaged, driving the tilting plate 32 to move, which in turn drives the tower 4 to tilt.When the tower 4 is tilted from a horizontal orientation to a vertical orientation, the lifting and assembly component 1 lifts the clamped tower 4, and the tower 4 is transported to the assembly position. S12: Positioning; the rotary component 52 is adjusted so that it drives the clamping plate 51 to move, thus causing the clamping plate 51 to tilt. Then the lifting and assembly component 1 places the turret 4 at the assembly position, and the assembly of the turret 4 is completed; in particular, the rotary motor 521 is switched on so that the rotary motor 521 drives the first gear 522 to move, the first gear 522 in turn drives the second gear 523 to move, the second gear 523 finally drives the clamping plate 51 to move, thus causing the clamping plate 51 to tilt, so that the turret 4 can be placed at the assembly position without obstruction. In one embodiment of the present disclosure, the tower 4 may be obstructed by the clamping plate 51 during lifting and placement if there is an angle between the clamping plate 51 and the load-bearing plate 31. Therefore, an adjustment of the angle between the clamping plate 51 and the load-bearing plate 31 is necessary. Driven by the rotary component 52, the clamping plates 51 at both ends of the load-bearing plate 31 move in opposite directions until the load-bearing plate 31 and the clamping plates 51 at both ends of the load-bearing plate 31 are in a horizontal position, thus tilting the clamping plates 51. This allows for smooth placement of the tower 4 at the assembly position. S2: Assembly of a rotor blade 6; S21: Position setting; the rotary component 52 is adjusted so that it drives the clamping plate 51 to move, thus causing it to tilt. This brings the clamping plate 51 and the load-bearing plate 31 into a vertical position; in particular, the rotary motor 521 is switched on, so that it drives the first gear 522, which in turn drives the second gear 523, and finally the second gear 523 drives the clamping plate 51 to move, thus causing it to tilt, thereby bringing the lifting and assembly device into the second position; S22. Clamping of the rotor blade 6; the lifting and assembly component 1 places the clamping unit 5 at the clamping point of the rotor blade 6 (clamping unit 5 is located at the transport vehicle position of the rotor blade 6; the lifting frame 2 is moved so that the rotor blade 6 enters the clamping slot 511), the clamping component 53 is switched on so that the clamping component 53 clamps the rotor blade 6; then the lifting and assembly component 1 transports the clamped rotor blade 6 to the assembly position of the rotor blade 6 and the assembly of the rotor blade 6 is completed.

[0043] The clamping of the rotor blade 6 occurs as follows: When the rotor blade 6 enters the clamping slot 511, the adjusting motor 5341 is switched on. The adjusting motor 5341 drives the adjusting screw 5342 to rotate, and the rotation of the adjusting screw 5342 in turn drives the adjusting block 5343 to move. The movement of the adjusting block 5343 drives the lower clamping block 531 to move. This causes the lower clamping block 531 to move within the clamping slot 511 to find the optimal clamping position for the rotor blade 6. Once the lower clamping block 531 has moved into the correct position, the lower actuating cylinders 5321 are switched on, so that the lower actuating cylinders 5321 drive the upper clamping blocks 532 to move, and the upper clamping blocks 532 then come into contact with the rotor blade 6. After the upper clamping blocks 532 have come into contact with the rotor blade 6, the lateral pressure block 533 is adjusted.In particular, the drive motor 5353 is switched on, causing it to rotate and drive the drive gear 5351. The rotation of the drive gear 5351, in turn, drives the drive rack 5352. The drive rack 5352 drives the lateral pressure block 533 to approach the rotor blade 6, so that the lateral pressure block 533 comes into contact with the side of the rotor blade 6. This achieves a lateral limitation of the rotor blade 6 and thus ensures a clamping fixation of the rotor blade 6.

[0044] Unless otherwise defined, the technical or scientific terms used in this application have the usual meanings as understood by a person skilled in the field of the present application. The terms "first", "second", "third" and similar expressions used in this description of the present application do not indicate any order, quantity, or importance, but serve solely to distinguish different components. Terms such as "one" or "a" do not denote any quantitative limitation, but merely indicate the existence of at least one. The terms "including" or "comprising" and similar expressions mean that the elements or objects preceding "including" or "comprising" include the elements or objects listed after "including" or "comprising" and their equivalents, without excluding any other elements or objects.Terms like "above," "below," "left," and "right" are used exclusively to indicate relative positions. If the absolute position of the described object changes, the relative positions may also change accordingly.

Claims

[1] Lifting and assembly device for wind turbines, characterized bythat the wind turbine comprises a tower (4), a nacelle (7) and rotor blades (6); wherein several towers (4) are provided, which are successively connected at the assembly position via the lifting and assembly device in the assembly state; the nacelle (7) is provided on the tower (4) and the nacelle (7) has at least three mounting holes (71); the rotor blades (6) are each positioned at the mounting holes (71) via the lifting and assembly device; the lifting and assembly device can be operated in a first state and a second state, wherein in the first state it is configured for lifting and assembling the tower (4) and in the second state it is configured for lifting and assembling the rotor blades (6); the lifting and assembly device comprises a lifting and assembly component (1), a lifting frame (2) and a tilting unit (3) connected to the lifting frame (2);the lifting frame (2) is rotatably connected to the lifting cable of the lifting and assembly component (1); the tilting unit (3) comprises a load-bearing plate (31), a tilting plate (32), a clamping and tensioning component (33) and a traction component (34); the load-bearing plate (31) is connected to the lifting frame (2); the tilting plate (32) is rotatably connected to the load-bearing plate (31) via the traction component (34); the clamping and tensioning component (33) comprises a clamping and tensioning plate (331), a drive element (332) and several clamping and tensioning blocks (333); the clamping and tensioning plate (331) is rotatably connected to one side of the tilting plate (32); several clamping and clamping blocks (333) are slidably connected to the clamping and clamping plate (331) via the drive element (332), and the outer circumference of the tower (4) has an annular projection (41); the clamping and clamping blocks (333) have clamping and clamping grooves (3331) that are adapted to the annular projection (41);In the first state, the traction component (34) drives the tilting plate (32) to move, so that the tower (4) located on the tilting plate (32) moves; and the drive element (332) drives the clamping and clamping blocks (333) to move, so that the clamping and clamping blocks (333) engage with and are attached to the annular projection (41); the lifting and assembly device further comprises at least two clamping units (5); the clamping unit (5) comprises a clamping plate (51), a rotary component (52) and a clamping component (53); the clamping plate (51) is rotatably connected to the load-bearing plate (31); in the second state, the rotary component (52) changes the angle between the clamping plate (51) and the load-bearing plate (31), so that the clamping component (53) can clamp the rotor blades; the rotary component (52) comprises a rotary motor (521), a first gear (522) and a second gear (523);the first gear (522) is rotatably connected to the load-bearing plate (31) via the rotary motor (521); the second gear (523) is rotatably connected to the axis of rotation of the clamping plate (51) and the load-bearing plate (31), wherein the first gear (522) and the second gear (523) mesh; the rotary motor (521) is designed to drive the rotation of the first gear (522). [2] Lifting and assembly device for wind turbines according to claim 1, characterized by, that the traction component (34) comprises a traction motor (341), a reduction gear (342), a first connecting rod (343) and a second connecting rod (344); the reduction gear (342) is provided on the load-bearing plate (31), and the traction motor (341) is configured to drive the reduction gear (342) to rotate; the first connecting rod (343) is connected to the output end of the reduction gear (342); the second connecting rod (344) is rotatably connected to the end of the first connecting rod (343) facing away from the reduction gear (342), wherein the axial direction of the output end of the reduction gear (342) corresponds to the axial direction of the axis of rotation between the first connecting rod (343) and the second connecting rod (344); the tilting plate (32) is hinged to the other end of the second connecting rod (344). [3] Lifting and assembly device for wind turbines according to claim 2, characterized by, that the traction component (34) further comprises a limiting element (345); the limiting element (345) comprises an arcuate block (3451) and a limiting rod (3452); the arcuate block (3451) is provided on the load-bearing plate (31) and the arcuate block (3451) has a limiting groove (34511); one end of the limiting rod (3452) is connected to the axis of rotation of the tilting plate (32) and the load-bearing plate (31), while the other end of the limiting rod (3452) projects into the limiting groove (34511) and is slidably connected to the side wall of the limiting groove (34511). [4] Lifting and assembly device for wind turbines according to claim 1, characterized bythat the drive element (332) comprises a bidirectional drive spindle (3321), a drive bevel gear (3322), an output bevel gear (3323) and a drive motor (3324); the bidirectional drive spindle (3321) is rotatably connected to the clamping and clamping plate (331), wherein the bidirectional drive spindle (3321) comprises a right-hand threaded section (33211), a left-hand threaded section (33212) and a central straight section (33213), several clamping and clamping blocks (333) are provided on the right-hand threaded section (33211) and the left-hand threaded section (33212), and the clamping and clamping blocks (333) are slidably connected to the clamping and clamping plate (331); the output bevel gear (3323) is provided on the central straight section (33213); the drive bevel gear (3322) is rotatably connected to the clamping and clamping plate (331) by means of the drive motor (3324) and the drive bevel gear (3322) and the output bevel gear (3323) mesh together;the drive motor (3324) is designed to drive the rotation of the drive bevel gear (3322). [5] Lifting and assembly device for wind turbines according to claim 1, characterized bythat the clamping plate (51) has a clamping slot (511) wherein the clamping component (53) is provided in the clamping slot (511); the clamping component (53) comprises a lower clamping block (531), a lateral pressure block (533) and several upper clamping blocks (532); the lower clamping block (531) is slidably connected to the clamping plate (51); the several upper clamping blocks (532) are provided on a side wall of the clamping slot (511), the upper clamping blocks (532) and the lower clamping block (531) together form a clamping space for the rotor blade (6), and the distance between the several upper clamping blocks (532) and the lower clamping block (531) is variable; the lateral pressure block (533) is provided on a side wall of the clamping slot (511) so that the lateral pressure block (533) can be pressed against the side wall of the rotor blade (6). [6] Lifting and assembly device for wind turbines according to claim 5, characterized by, that the clamping component (53) comprises an adjusting element (534) for driving the movement of the lower clamping block (531); the adjusting element (534) comprises an adjusting motor (5341), an adjusting screw (5342) and an adjusting block (5343); the adjusting screw (5342) is rotatably connected to the clamping plate (51), the axial direction of the adjusting screw (5342) being perpendicular to the stroke direction of the lifting and assembly component (1); the adjusting block (5343) is screwed to the adjusting screw (5342) and is slidably connected to a side wall of the clamping slot (511), and the lower clamping block (531) is connected to the adjusting block (5343); the adjusting motor (5341) is designed to drive the rotation of the adjusting screw (5342). [7] Lifting and assembly device for wind turbines according to claim 5, characterized bythat the clamping component (53) further comprises a drive element (535) for driving the lateral pressure block (533) to approach the rotor blade (6); the drive element (535) comprises a drive gear (5351), a drive rack (5352) and a drive motor (5353); the drive gear (5351) is rotatably connected to the clamping plate (51) via the drive motor (5353); the drive rack (5352) is slidably connected to the tilting plate (32); the lateral pressure block (533) is provided on the drive rack (5352); the drive gear (5351) and the drive rack (5352) mesh; the drive motor (5353) is designed to drive the rotation of the drive gear (5351). [8] Lifting and assembly device for wind turbines according to claim 1, characterized by , that the clamping and tensioning block (333) is arc-shaped, and the curvature of the clamping and tensioning block (333) corresponds to the curvature of the tower (4).

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