spreader

Abstract

The present disclosure provides a hoist for hoisting the hub of a wind turbine generator set, the hoist comprising: a crossbeam; a longitudinal beam, the upper end of the longitudinal beam being connected to the crossbeam; a pivot shaft extending roughly parallel to the crossbeam and rotatably supported on the lower end of the longitudinal beam; a rotating module comprising a connecting disk for connecting a component to be hoisted, the connecting disk being connected to a first end of the pivot shaft; a driving assembly connected to the pivot shaft to drive the connecting disk to rotate by driving the pivot shaft to rotate. Since the hoist comprises a pivot shaft and a rotating module connected to the pivot shaft and capable of rotating with the pivot shaft, the rotating module can be connected to the component to be hoisted to drive the rotation or even flipping of the component to be hoisted through the rotation of the pivot shaft, thereby reducing the difficulty of the hoisting process and improving installation efficiency.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of engineering machinery, and in particular relates to a hub hoist for hoisting a wind turbine generator set. Background Art

[0002] Currently, a more mainstream installation method for offshore wind turbines is single-blade hoisting, which is divided into head-integrated single-blade hoisting and head-split single-blade hoisting. In the head-integrated single-blade hoisting, the nacelle, generator, and hub are assembled in the factory and shipped as a whole. After arriving at the offshore installation site, the three major components are hoisted as a whole, and finally each blade is installed separately. In the head-split single-blade hoisting, the nacelle, generator, and hub are not pre-assembled in the factory. The three major components are shipped separately and hoisted separately after arriving at the offshore installation site. Finally, each blade is installed separately.

[0003] The head split single-blade installation method has relatively low requirements for the installation vessel. For example, it can be applied to installation vessels with a main hoist capacity of less than 800t, which is more economical.

[0004] However, during the installation of the split single-blade engine, the hub is transported upright to the engine location. During the installation, the hub needs to be flipped 90° on the deck of the installation vessel and then docked in the air with the generator. This flipping process usually requires the cooperation of two cranes. Since the installation process lasts for a long time, it occupies crane resources. Summary of the Invention

[0005] A main purpose of the invention disclosed in the present invention is to provide a hoisting device to simplify the hoisting process of the components to be hoisted and improve the installation efficiency.

[0006] In view of the above-mentioned invention objectives, the present disclosure provides the following technical solutions:

[0007] One aspect of the present disclosure provides a hoist for hoisting the hub of a wind turbine generator set, the hoist comprising: a crossbeam; a longitudinal beam, the upper end of the longitudinal beam being connected to the crossbeam; a pivot shaft extending roughly parallel to the crossbeam and rotatably supported on the lower end of the longitudinal beam; a rotating module comprising a connecting disk for connecting a component to be hoisted, the connecting disk being connected to a first end of the pivot shaft; and a drive assembly connected to the pivot shaft to drive the connecting disk to rotate by driving the pivot shaft.

[0008] The connecting plate of the rotation module is connected to a pivot shaft. The drive assembly drives the pivot shaft to rotate, driving the connecting plate to rotate along with it. Because the hub is connected to the connecting plate, the pivot shaft can be driven to rotate, causing the hub to flip and dock with the wind turbine generator. Compared to existing solutions that rely on two lifting devices to lift and flip the hub, the lifting device provided in this disclosure is simpler and improves hub installation efficiency.

[0009] Furthermore, the driving assembly drives the pivot shaft to rotate, so as to drive the connecting disk to rotate around the pivot shaft by a predetermined angle, and the predetermined angle is not less than 90°.

[0010] Optionally, the second end of the pivot shaft protrudes from the longitudinal beam, and the drive assembly includes a rotating disk fixed to the second end of the pivot shaft and a first telescopic member connected to the rotating disk, the first end of the first telescopic member is connected to the longitudinal beam or the cross beam, and the second end of the first telescopic member is connected to the rotating disk to drive the pivot shaft to rotate through the telescopic movement of the first telescopic member.

[0011] According to another exemplary embodiment of the present disclosure, there are two first telescopic members, which are respectively connected to two ends of the pivot axis in a radial direction.

[0012] Optionally, the sling further comprises an inclination adjustment unit for adjusting an inclination angle of the connecting plate relative to the pivot axis.

[0013] More specifically, the inclination adjustment unit includes: a connecting shaft, rotatably arranged at the first end of the pivot shaft, the connecting shaft is arranged perpendicular to the pivot shaft, and the connecting disk is fixedly connected to the connecting shaft, a turbine and a worm, the turbine is fixedly connected to one end of the connecting shaft, the worm is engaged with the turbine, and the worm is connected to the pivot shaft through a base; a first motor, used to drive the worm to rotate.

[0014] Furthermore, the spreader further includes a first controller and a first angle sensor, the first angle sensor is used to monitor the tilt angle of the connecting plate, and the first controller controls the start and stop of the tilt adjustment unit according to the angle information of the first angle sensor.

[0015] According to another exemplary embodiment of the present disclosure, the sling further includes a longitudinal beam driving module, which includes a slider sliding along the extension direction of the crossbeam and a second telescopic member for driving the slider to slide, and the first end of the longitudinal beam is fixed to the bottom of the slider.

[0016] Optionally, the lifting device further comprises a movable lifting ear assembly, wherein the movable lifting ear assembly comprises a lifting ear slidably connected to the crossbeam and a lifting ear driving assembly for driving the lifting ear to move.

[0017] Furthermore, the lifting ear drive assembly includes a lead screw and a second motor for driving the lead screw to rotate, the lead screw is arranged on the beam and extends parallel to the beam, the lifting ear has a threaded hole matching the lead screw, and the lead screw rotates driven by the second motor to drive the lifting ear to reciprocate along the length direction of the beam.

[0018] Furthermore, the sling also includes a second angle sensor and a second controller. The second angle sensor is used to monitor the angle between the beam and the horizontal plane. The second controller controls the start and stop of the lifting eye drive assembly according to the angle information of the second angle sensor.

[0019] According to another exemplary embodiment of the present disclosure, the sling further includes a counterweight and a wind ring, wherein the counterweight is disposed on a distal end of the transverse beam relative to the longitudinal beam, and the number of the wind ring is at least one.

[0020] Specifically, the connecting disk is in the shape of a circular ring and has a flange for connecting to a connecting flange of a pitch bearing on a hub of a wind turbine generator set or a flange of the pitch bearing.

[0021] The sling provided by the present disclosure has at least the following beneficial effects: the sling includes a pivot shaft and a rotating module connected to the pivot shaft and capable of rotating with the pivot shaft, the rotating module can be connected to the component to be hoisted to drive the rotation or even flipping of the component to be hoisted through the rotation of the pivot shaft, thereby reducing the difficulty of the hoisting process and improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or other objects and advantages of the present disclosure will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 A structural diagram of a sling provided by an exemplary embodiment of the present disclosure.

[0024] Figure 2 for Figure 1 Structural diagram of the combination of the drive component and the rotation module.

[0025] Figure 3 for Figure 1 The diagram shows the state of the spreader and the hub being combined.

[0026] Figure 4 for Figure 1 The diagram of the usage status of the spreader drive hub flipping.

[0027] Description of reference numerals:

[0028] 1. Horizontal beam; 2. Longitudinal beam; 3. Rotation module;

[0029] 4. Counterweight; 5. Wind cable ring; 6. Second angle sensor;

[0030] 7. Power supply unit; 8. Control cabinet; 9. Lifting lug;

[0031] 10. Lead screw; 11. Second motor; 12. Second telescopic member;

[0032] 13. Slider; 16. First slide rail; 17. Second slide rail;

[0033] 21. First telescopic member; 22. Rotating disk; 23. Bracket;

[0034] 24. Pivot shaft; 25. Bearing; 27. End cover;

[0035] 29. Connecting shaft; 30. Connecting plate; 31. First angle sensor;

[0036] 34. Turbine; 35. Worm; 36. First motor;

[0037] 37. Base; 38. Hub. DETAILED DESCRIPTION

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the embodiments of the present disclosure are limited to the embodiments described herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0039] When the hub is transported to the installation site via the transport jig, it sits upright on the transport jig, i.e., the flange surface of the hub 38 connected to the wind turbine generator faces downward and is placed horizontally. This state of the hub 38 is referred to as the vertical state in this disclosure. When the hub 38 is installed in the air, with the flange surface connected to the wind turbine generator in the vertical state, this state of the hub 38 is referred to as the horizontal state in this disclosure.

[0040] Reference Figure 1The present disclosure provides a lifting device that can be used to lift and flip the wheel hub 38 on the installation vessel. The lifting device includes a crossbeam 1, a longitudinal beam 2, a pivot shaft 24, a rotation module 3 and a drive assembly, wherein the upper end of the longitudinal beam 2 can be connected to the crossbeam 1, and a mounting hole (not shown) for accommodating the pivot shaft 24 is provided at the lower end of the longitudinal beam 2, and the pivot shaft 24 is rotatably disposed in the mounting hole. The rotation module 3 may include a connecting disk 30 for connecting to the wheel hub 38, and the connecting disk 30 may be connected to the pivot shaft 24. The pivot shaft 24 can be driven by a drive assembly to drive the wheel hub 38 to rotate together with the rotation of the pivot shaft 24.

[0041] In the present disclosure, the connection disk 30 of the rotation module 3 is connected to the pivot shaft 24. The drive assembly drives the pivot shaft 24 to rotate, thereby driving the connection disk 30 to rotate together. Since the hub 38 is connected to the connection disk 30, the pivot shaft 24 can be driven to rotate to drive the hub 38 to flip. For example, the hub 38 can be flipped from a vertical position to a horizontal position in the air to dock with the generator of the wind turbine. Compared with the technical solution of the prior art that uses two lifting devices to lift and flip the hub 38, the lifting device structure provided by the present disclosure is simpler and improves the installation efficiency of the hub 38.

[0042] In order to prevent the longitudinal beam 2 from being subjected to unnecessary bending moments during use, the cross beam 1 is arranged approximately vertically to the longitudinal beam 2. During use, the cross beam 1 is arranged approximately horizontally. The lower end of the longitudinal beam 2 is provided with a circular mounting hole whose central axis is approximately parallel to the cross beam 1. Figure 1 As shown, the mounting hole passes through the left and right ends of the longitudinal beam 2 , so that the two ends of the pivot shaft 24 are respectively located on the left and right sides of the longitudinal beam 2 .

[0043] Specifically, the pivot shaft 24 can be configured so that both ends protrude from the mounting hole. A connecting plate 30 for connecting to the hub 38 can be mounted on the first end of the pivot shaft 24. A drive assembly for driving the pivot shaft 24 to rotate can be connected to the second end of the pivot shaft 24. The drive assembly can drive the pivot shaft 24 to rotate, thereby driving the hub 38 to rotate about the pivot shaft 24 via the connecting plate 30. Specifically, the pivot shaft 24 can be mounted in the mounting hole of the longitudinal beam 2 via a bearing 25, but this is not a limitation. In this embodiment, the connecting plate 30 can be connected to the pitch bearing of the hub 38 via fasteners, but this is not a limitation.

[0044] Reference Figure 2 The driving assembly may include a rotating disk 22 and a first telescopic member 21, the rotating disk 22 is fixedly connected to the second end of the pivot shaft 24, for example but not limited to, the central axis of the pivot shaft 24 may be perpendicular to the plane where the rotating disk 22 is located.

[0045] Specifically, the rotating disk 22 is arranged to be elliptical, and a through hole for the second end of the pivot shaft 24 to pass through is provided in the middle part of the rotating disk 22. The second end of the pivot shaft 24 is inserted into the through hole of the rotating disk 22 after passing through the mounting hole of the longitudinal beam 2, and the end cover 27 of the pivot shaft 24 is connected to the rotating disk 22 by a fastener. The two ends of the long axis of the rotating disk 22 are respectively connected to the lower end of the first telescopic member 21 by a hinge, and the upper end of the first telescopic member 21 is connected to the bracket 23 by a hinge, and the bracket 23 is fixed on the longitudinal beam 2 or the crossbeam 1. The two first telescopic members 21 alternately extend and shorten to drive the rotating disk 22 to rotate around the centerline axis of the pivot shaft 24, thereby driving the pivot shaft 24 to rotate. Preferably, there are two first telescopic members 21, and they are respectively connected to the two ends of the pivot shaft 24 radially.

[0046] In this embodiment, the driving assembly and the connecting plate 30 are respectively arranged on both sides of the longitudinal beam 2. Figure 1 As shown, the drive assembly is arranged on the right side of the longitudinal beam 2 , and the connecting plate 30 is arranged on the left side of the longitudinal beam 2 , but this is not limited to the embodiment. The drive assembly and the connecting plate 30 can be arranged on the same side of the longitudinal beam 2 .

[0047] In this embodiment, the pivot shaft 24 can rotate around its own axis within the range of ±90°. Specifically, the driving assembly drives the pivot shaft 24 to rotate to drive the connecting plate 30 to rotate around the central axis of the pivot shaft 24 by a predetermined angle, which is not less than 90°.

[0048] In this embodiment, the first telescopic member 21 can be a hydraulic cylinder, a pneumatic cylinder or a screw assembly, but is not limited thereto. In addition, this embodiment is described by taking a pair of first telescopic members 21 symmetrically arranged on the rotating disk 22 as an example, but is not limited thereto. Alternatively, only a single first telescopic member 21 can be provided on the rotating disk 22.

[0049] When the hub 38 is in a vertical state, one of the pitch bearings on the hub 38 can face the connecting disk 30. The pitch bearing on the hub 38 is fixedly connected to the connecting disk 30, and then the pivot shaft 24 is driven to rotate by the drive assembly. The hub 38 can be flipped 90°, so that the flange surface of the pitch bearing of the hub 38 used to dock with the generator of the wind turbine generator set is adjusted to a vertical direction.

[0050] The connecting plate 30 can be directly connected to the pivot shaft 24, so that the rotation of the pivot shaft 24 directly drives the connecting plate 30 to rotate. However, generally, when the hub 38 is in a vertical position, the flange surface of the pitch bearing on the hub 38 is usually slightly tilted relative to the horizontal direction. Therefore, it cannot be easily aligned with the connecting plate 30, and one side of the hub 38 may need to be raised to adjust the flange surface of the pitch bearing.

[0051] To more conveniently align hub 38 with connecting plate 30 without the additional step of adjusting the tilt angle of the pitch bearing of hub 38, the sling of the present disclosure is further provided with a tilt adjustment unit. Furthermore, in the embodiment shown in the accompanying drawings, the tilt adjustment unit may include a connecting shaft 29 rotatably disposed at a first end of pivot shaft 24, with the central axis of connecting shaft 29 perpendicular to the central axis of pivot shaft 24. Connecting plate 30 is fixedly connected to connecting shaft 29 so as to rotate therewith.

[0052] The tilt adjustment unit also includes a turbine 34 and a worm 35. The turbine 34 is fixedly connected to one end of the connecting shaft 29. The worm 35 meshes with the turbine 34 and is connected to the pivot shaft 24 via a base 37. Specifically, the base 37 can be formed as a convex-shaped frame and fixedly connected to the pivot shaft 24. The turbine 34 can be disposed at the top of the convex-shaped frame, and the worm 35 can be disposed at the bottom of the convex-shaped frame. The worm 35 can be driven by a first motor 36. Because the turbine 34 is fixedly connected to the connecting shaft 29, the worm 35 drives the turbine 34 to rotate, which in turn drives the connecting shaft 29 to rotate, thereby driving the connecting disk 30 to rotate about the central axis of the connecting shaft 29.

[0053] In the present disclosure, by fixing the connecting disk 30 to the connecting shaft 29, the connecting disk 30 can be driven to rotate by driving the connecting shaft 29 to rotate, thereby adapting to the cone angle of the pitch bearing of the hub 38 and accurately docking with the pitch bearing. The rotation angle of the connecting shaft 29 can be set as needed, for example, but not limited to, the connecting shaft 29 can rotate within a range of ±4° around its own central axis.

[0054] The present invention can drive the connecting disc 30 to rotate around the central axis of the pivot shaft 24 through the rotation of the pivot shaft 24, so that the hub 38 can be rotated from a vertical state to a horizontal state to facilitate docking with the generator of the wind turbine. The connecting disc 30 can also be driven to rotate around the central axis of the connecting shaft 29 by the rotation of the connecting shaft 29 in the tilt adjustment unit to adapt to the angle of the pitch bearing of the hub 38, so as to accurately dock with the generator of the wind turbine. The sling in the present invention can realize the lifting and flipping of the hub 38. Compared with the technical solution of using two slings to coordinate and realize the flipping of the hub 38 in the prior art, the sling structure of the present invention is simpler, the cost is lower, and the installation efficiency of the hub 38 is improved.

[0055] To accurately control the rotation angle of the connecting disk 30, a first angle sensor 31 and a first controller are mounted on the connecting disk 30. The first angle sensor 31 is used to monitor the angle between the connecting disk 30 and the target position and transmit this angle information to the first controller, which then controls the start and stop of the tilt adjustment unit. Specifically, the first controller can be electrically connected to the first angle sensor 31 and the first motor 36. The first angle sensor 31 transmits the angle information to the first controller, which controls the start and stop and the operating time of the first motor 36, thereby driving the connecting disk 30 to rotate to the target position. For example, but not limited to, the first angle sensor 31 can be a tilt sensor.

[0056] In order to maintain the balance of the sling, a counterweight 4 is provided at one end of the crossbeam 1, and the counterweight 4 is provided at the far end of the crossbeam 1 relative to the longitudinal beam 2. Figure 1 In the embodiment, the counterweight 4 can be installed at the left end of the crossbeam 1, and the longitudinal beam 2 can be installed at the right end of the crossbeam 1. In this disclosure, the left end of the crossbeam 1 can be defined as the first end, and the right end of the crossbeam 1 can be defined as the second end. When the hub 38 is connected to the connecting plate 30, the counterweight 4 can maintain the torque balance at both ends of the crossbeam 1, thereby maintaining the overall balance of the sling and the hub 38.

[0057] During the flipping process of the hub 38, in order to improve the stability of the sling and maintain the overall balance of the sling and the hub 38, the sling also includes a movable lifting lug assembly, which includes a lifting lug 9 slidably connected to the crossbeam 1 and a lifting lug drive assembly for driving the lifting lug 9 to move. Furthermore, the lifting lug drive assembly may include a lead screw 10 and a second motor 11 for driving the lead screw 10 to rotate. The lead screw 10 is arranged on the crossbeam 1 and extends parallel to the crossbeam 1. The lifting lug 9 has a threaded hole that matches the lead screw 10. Driven by the second motor 11, the lead screw 10 rotates to drive the lifting lug 9 to reciprocate along the length of the crossbeam 1.

[0058] Specifically, refer to Figure 1 , a lifting ear 9, a screw 10 and a second motor 11 for driving the screw 10 to rotate, the screw 10 is arranged on the beam 1 in a direction parallel to the beam 1, the lifting ear 9 is slidably connected to the beam 1, the lifting ear 9 has a threaded hole matching the screw 10, and the screw 10 rotates under the drive of the second motor 11 to drive the lifting ear 9 to move along the axial direction of the screw 10. The movement of the lifting ear 9 can drive the movement of the overall center of gravity of the sling and the hub 38, thereby maintaining the overall balance of the sling and the hub 38.

[0059] Furthermore, the lifting lug 9 is arranged at the top of the crossbeam 1, and a first slide rail 16 extending along the extension direction of the crossbeam 1 is provided at the top of the crossbeam 1. A slider portion matching the first slide rail 16 is provided at the bottom of the lifting lug 9, and a threaded hole matching the lead screw 10 is provided in the middle of the lifting lug 9. The lead screw 10 can extend parallel to the extension direction of the crossbeam 1 and can be arranged at the top of the crossbeam 1. The second motor 11 is fixed to the top of the crossbeam 1. In this embodiment, the first slide rail 16 can be formed by the top portion of the two side surfaces in the width direction of the crossbeam 1 being recessed inward, but the present invention is not limited thereto. Figure 1 In the embodiment, the left and right direction of the beam 1 is the length direction, the up and down direction is the height direction, and the width direction is perpendicular to both the length direction and the height direction. In this embodiment, the eye drive assembly can also be a telescopic cylinder, such as but not limited to a pneumatic cylinder or a hydraulic cylinder.

[0060] During the turning process of the hub 38, its center of gravity will change, and therefore the center of gravity of the hub 38 and the sling as a whole will also change. In order to ensure the balance of the sling, the lug 9 can slide on the beam 1 to balance the sling and the hub 38 as a whole.

[0061] Furthermore, the sling may also include a second angle sensor 6 and a second controller. The second angle sensor 6 is used to monitor the angle between the beam 1 and the horizontal plane, and the second controller controls the start and stop of the lifting eye drive assembly according to the angle information of the second angle sensor 6. Specifically, the second controller can be electrically connected to the second angle sensor 6 and the second motor 11 respectively, and control the start and stop of the second motor 11 according to the angle information of the second angle sensor 6. Furthermore, the second angle sensor 6 can be arranged at the top of the end of the beam 1 where the counterweight 4 is arranged. When an inclination occurs between the beam 1 and the horizontal plane, the second angle sensor 6 transmits the monitored inclination value to the second controller, and the second controller can start the second motor 11 and make it run to drive the lifting eye 9 to move until the beam 1 is horizontal again.

[0062] When the longitudinal beam 2 approaches the nacelle and enters the shroud to connect to the pitch bearing of the hub 38, or when the hub 38 is installed and the longitudinal beam 2 moves away from the nacelle to exit the shroud and away from the pitch bearing of the hub 38, the longitudinal beam 2 can slide relative to the crossbeam 1. Specifically, the spreader also includes a longitudinal beam drive module, which includes a slider 13 that slides along the extension direction of the crossbeam 1 and a second telescopic member 12 for driving the slider 13 to slide. The first end of the longitudinal beam 2 is fixed to the bottom of the slider 13.

[0063] Specifically, there can be two second telescopic members 12, one on each side of the crossbeam 1 in the width direction and extending along the length direction of the crossbeam 1. The lower portions of the two side surfaces in the width direction of the crossbeam 1 are recessed inward to form second slide rails 17. The slider 13 is slidably disposed on the second slide rails 17. The top of the longitudinal beam 2 is fixed to the bottom of the slider 13 so as to be able to slide along the second slide rails 17 along with the slider 13. Furthermore, the two second telescopic members 12 can operate synchronously to jointly drive the connecting plate 30 toward or away from the cabin.

[0064] In this embodiment, the second slide rail 17 may be disposed parallel to the first slide rail 16 , and the second slide rail 17 may be arranged below the first slide rail 16 , but the present invention is not limited thereto.

[0065] The first end of the second telescopic member 12 is disposed near the first end of the crossbeam 1 and is fixedly connected to the crossbeam 1. The second end of the second telescopic member 12 is disposed near the second end of the crossbeam 1. The slider 13 is sleeved on the second slide rail 17, and the second end of the second telescopic member 12 is connected to the slider 13. When the connecting plate 30 needs to be close to the generator of the wind turbine generator set, the two second telescopic members 12 can be retracted simultaneously, and the slider 13 slides toward the nacelle, driving the hub 38 to approach the nacelle. When the hub 38 is accurately docked with the generator in the nacelle and the connection is completed, the two second telescopic members 12 can be extended simultaneously to move the connecting plate 30 away from the nacelle.

[0066] The spreader disclosed herein also includes a power supply unit 7 and a control cabinet 8. These units can be mounted on the first end of the crossbeam 1. The power supply unit 7 can be used to provide power to the entire spreader, while the control cabinet 8 can be used to integrate various electrical components to control and monitor the functions of the entire spreader system. For example, but not limited to, the power supply unit 7 can be a diesel generator.

[0067] In this embodiment, the sling further includes at least one wind ring 5. The number of wind rings 5 ​​can be set according to actual needs. The accompanying drawings take two wind rings 5 ​​as an example for illustration. The two wind rings 5 ​​can be arranged at both ends of the beam 1. Figure 1 Only the wind ring 5 at the second end of the beam 1 is shown; the wind ring 5 at the first end of the beam 1 is not shown because it is obscured by the power supply unit 7. When the hoist is lifting the hub 38, the mechanical wind on the installation vessel can be directly connected to the wind ring 5 on the beam 1 to maintain the stability of the hoist during the installation of the hub 38.

[0068] Reference Figure 3 and Figure 4Specifically, the use process of this sling can be described as follows: before lifting the hub 38, the sling of the sling can be connected to the lifting lug 9 through the shackle, and the sling is moved to the top of the hub 38 and dropped down until the connecting plate 30 can dock with a pitch bearing of the hub 38. The second telescopic member 12 is actuated, and the longitudinal beam 2 and the rotating module 3 as a whole approach and enter the fairing. For example, but not limited to, this action can be controlled by operating the remote control handle. Start the first motor 36, so that the connecting shaft 29 is driven by the worm gear assembly to rotate a predetermined angle, until the pitch bearing of the hub 38 can match the angle of the connecting plate 30. For example, but not limited to, when the angle between the flange surface of the pitch bearing of the hub 38 and the horizontal plane is 4°, the angle between the connecting plate 30 and the pitch bearing can be displayed on the control panel, and the inclination angle of the connecting plate 30 is 4°.

[0069] The second telescopic member 12 moves again, and the longitudinal beam 2 and the rotating module 3 as a whole continue to move closer to the hub 38 until the flange surface of the connecting plate 30 is tightly fitted with the flange surface of the pitch bearing. The connecting bolts are installed and the tightening torque is applied. At this time, the hanger and the hub 38 are in a combined state, as shown in FIG. Figure 3 As shown, the second motor 11 is activated, driving the lead screw 10 and the lifting lug 9 to the theoretical center of gravity of the entire assembly, preventing the hub 38 from tilting during the initial lifting process. At this point, the mechanical wind stabilization hook descends and connects with the wind ring 5 on the crossbeam 1. After the hub 38 is lifted, the mechanical wind stabilization hook controls the lifting device to ensure stability during the lifting process.

[0070] The hoist slowly lifts the hub 38. When the hub 38 is lifted to a height of about 5 meters from the deck of the installation ship, the first motor 36 is started to drive the rotating disk 22 to rotate, thereby driving the pivot shaft 24 to rotate. The pivot shaft 24 drives the entire connecting disk 30 to rotate. By driving the rotating disk 22 to rotate, the hub 38 is turned over, so that the hub 38 can be turned from a vertical state to a horizontal state. Figure 4 shown.

[0071] During the entire turning process, the center of gravity of the hub 38 constantly changes, causing the center of gravity of the hub 38 and the spreader to also change. To prevent the entire spreader from tilting, the second angle sensor 6 on the crossbeam 1 cooperates with the second motor 11 to drive the lifting lugs 9 to move, thereby maintaining the spreader level. The second telescopic member 12 then actuates again, moving the longitudinal beam 2 and the rotating module 3 away from the deflector, lowering the spreader to the installation vessel's deck until the hub 38 is installed. The entire process requires only a single spreader and eliminates the need to install or remove unnecessary accessories, making the hub 38 installation efficient and time-saving.

[0072] The sling provided in the present disclosure includes a rotation module 3, which can be used to drive the wheel hub 38 to flip, so as to flip the wheel hub 38 in a vertical state to a horizontal state, thereby reducing the number of slings used and improving the installation efficiency of the wheel hub 38.

[0073] In addition, the sling also includes a counterweight 4, and the counterweight 4 and the rotating module 3 are respectively arranged at both ends of the beam 1. When the rotating module 3 is connected to the hub 38, the counterweight 4 can balance the center of gravity of the whole composed of the sling and the hub 38, thereby maintaining the balance of the sling.

[0074] The sling has a movable lifting lug assembly. During the turning process of the wheel hub 38, the movable lifting lug assembly can cooperate with the second angle sensor 6 to realize the function of automatically adjusting the center of gravity balance. The structure is simple and the labor cost is reduced.

[0075] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0076] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this disclosure, unless otherwise specified, "plurality" means two or more.

[0077] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections via an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0078] The features, structures or characteristics described in the present disclosure may be combined in any suitable manner in one or more embodiments. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

Claims

1. A hoist for hoisting a hub (38) of a wind turbine generator set, characterized in that: The spreader comprises: beam (1); A longitudinal beam (2), the upper end of the longitudinal beam (2) being connected to the transverse beam (1); a pivot shaft (24) extending substantially parallel to the cross beam (1) and rotatably supported on the lower end of the longitudinal beam (2); A rotation module (3) comprising a connection plate (30) for connecting to the hub (38), the connection plate (30) being connected to a first end of the pivot shaft (24), the connection plate (30) having a connection flange for connecting to a pitch bearing on the hub (38) or a flange for connecting to the pitch bearing; A driving assembly is connected to the second end of the pivot shaft (24) to drive the connecting disk (30) to rotate by driving the pivot shaft (24), thereby driving the wheel hub (38) to flip over. The driving assembly drives the pivot shaft (24) to rotate to drive the connecting disk (30) to rotate around the pivot shaft (24) by a predetermined angle, and the predetermined angle is not less than 90°, so that the flip angle of the wheel hub (38) is not less than 90°.

2. The sling according to claim 1, wherein: The second end of the pivot shaft (24) protrudes from the longitudinal beam (2), and the driving assembly comprises a rotating disk (22) fixed to the second end of the pivot shaft (24) and a first telescopic member (21) connected to the rotating disk (22), wherein the first end of the first telescopic member (21) is connected to the longitudinal beam (2) or the transverse beam (1), and the second end of the first telescopic member (21) is connected to the rotating disk (22), so that the pivot shaft (24) is driven to rotate by the telescopic movement of the first telescopic member (21).

3. The sling according to claim 2, wherein: There are two first telescopic members (21), which are respectively connected to the two radial ends of the pivot shaft (24).

4. The sling according to claim 1, wherein: The sling further comprises an inclination adjustment unit for adjusting the inclination angle of the connecting plate (30) relative to the pivot axis.

5. The sling according to claim 4, wherein: The tilt adjustment unit includes: A connecting shaft (29) is rotatably disposed at a first end of the pivot shaft (24), the connecting shaft (29) is arranged perpendicular to the pivot shaft (24), and the connecting plate (30) is fixedly connected to the connecting shaft (29); a turbine (34) and a worm (35), wherein the turbine (34) is fixedly connected to one end of the connecting shaft (29), the worm (35) is engaged with the turbine (34), and the worm (35) is connected to the pivot shaft (24) through a base; The first motor is used to drive the worm (35) to rotate.

6. The sling according to claim 4, wherein: The sling further comprises a first controller and a first angle sensor (31), wherein the first angle sensor (31) is used to monitor the tilt angle of the connecting plate (30), and the first controller controls the start and stop of the tilt adjustment unit according to angle information of the first angle sensor (31).

7. The spreader according to any one of claims 1 to 6, characterized in that: The sling further comprises a longitudinal beam driving module, the longitudinal beam driving module comprising a slider sliding along the extension direction of the cross beam (1) and a second telescopic member (12) for driving the slider to slide, and the first end of the longitudinal beam (2) is fixed to the bottom of the slider.

8. The spreader according to any one of claims 1 to 6, characterized in that: The sling further comprises a movable lifting lug assembly, wherein the movable lifting lug assembly comprises a lifting lug (9) slidably connected to the crossbeam (1) and a lifting lug driving assembly for driving the lifting lug (9) to move.

9. The spreader according to claim 8, wherein: The lifting lug drive assembly includes a lead screw (10) and a second motor (11) for driving the lead screw (10) to rotate, wherein the lead screw (10) is arranged on the beam (1) and extends parallel to the beam (1), and the lifting lug (9) has a threaded hole matching the lead screw (10). Driven by the second motor (11), the lead screw (10) rotates to drive the lifting lug (9) to reciprocate along the length direction of the beam (1).

10. The spreader according to claim 8, wherein: The lifting device further comprises a second angle sensor (6) and a second controller, wherein the second angle sensor (6) is used to monitor the angle between the beam (1) and the horizontal plane, and the second controller controls the start and stop of the lifting eye drive assembly according to the angle information of the second angle sensor (6).

11. The spreader according to claim 10, wherein: The sling further comprises a counterweight (4) and a wind cable ring (5), wherein the counterweight (4) is arranged on the far end of the crossbeam (1) relative to the longitudinal beam (2), and there is at least one wind cable ring (5).

12. The spreader according to any one of claims 1 to 6, characterized in that: The connecting disk (30) is in the shape of a circular ring.

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