Hoisting tool and wind turbine generator

Abstract

The application provides a hoisting tool and a wind turbine, and relates to the technical field of wind power. The hoisting tool comprises a lifting ring, the size of the lifting ring is matched with the size of a main bearing, and a plurality of hoisting connecting parts for connecting with hoisting ropes are uniformly arranged on the circumference of the lifting ring; a plurality of hoisting assemblies are uniformly arranged on the circumference of the lifting ring, the hoisting assembly comprises an adjusting mechanism and a lifting hook, the adjusting mechanism is movably connected to the lifting ring in the radial direction of the lifting ring, the lifting hook is fixedly connected to the adjusting mechanism, the lifting hook is configured to extend into the main bearing through a gap between two adjacent rollers of the main bearing, and the radial position of the lifting hook on the lifting ring is adjusted through the adjusting mechanism, so that the lifting hook is hooked and locked at the roller flange. The hoisting tool and the wind turbine improve the structural strength of the main bearing.

Description

Technical Field

[0001] This application relates to the field of wind power technology, and in particular to a hoisting tool and a wind turbine generator. Background Technology

[0002] As the core load-bearing component of the wind turbine's transmission system, the main shaft assembly contains the main bearing, a critical load-bearing part that bears the radial and axial loads during turbine operation. The assembly accuracy directly determines the overall reliability of the turbine. Due to the internal structural layout of the main shaft system, the space around the main bearing after assembly is small and enclosed, making it unsuitable for installation using pallet-type lifting tools. Currently, the industry standard assembly method involves pre-drilling lifting holes on the large end face of the inner ring of the main bearing. During assembly, lifting eye bolts are screwed into these holes, and lifting tools and chains are used to connect the lifting eye bolts to complete the lifting, transportation, and alignment of the main bearing. However, creating lifting holes in the main bearing reduces its structural strength. Summary of the Invention

[0003] To address at least one of the problems mentioned in the background art, this application provides a hoisting fixture and a wind turbine generator set to improve the structural strength of the main bearing.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] This application provides a lifting fixture for lifting the main bearing of a wind turbine generator set. The inner ring of the main bearing has roller flanges. The lifting fixture includes:

[0006] The lifting ring is sized to match the main bearing, and has multiple lifting connection parts evenly distributed around its circumference for connecting with the lifting ropes.

[0007] Multiple lifting assemblies are evenly arranged around the circumference of the lifting ring. Each lifting assembly includes an adjustment mechanism and a hook. The adjustment mechanism is movably connected to the lifting ring radially, and the hook is fixedly connected to the adjustment mechanism. The hook is configured to extend into the main bearing along the gap between two adjacent rollers of the main bearing. The adjustment mechanism adjusts the radial position of the hook along the lifting ring, thereby hooking and locking the hook at the roller retaining edge.

[0008] As an optional implementation, the lifting ring has a mounting through hole extending radially along the lifting ring. The adjusting mechanism includes an adjusting rod and a nut. The adjusting rod includes a connecting section, a mating section, and an adjusting section in sequence along its length. The cross-section of the connecting section is larger than the cross-section of the mounting through hole. The cross-section of the mating section matches the cross-section of the mounting through hole. The mating section is configured to pass through the mounting through hole. The adjusting section has threads. The nut is screwed onto the adjusting section. The hook is fixedly connected to the connecting section.

[0009] As an alternative implementation, the adjusting section extends to the radially inner side of the lifting ring, the connecting section extends to the radially outer side of the lifting ring, and the hook extends along one side of the axial direction of the lifting ring.

[0010] As an optional implementation, the adjusting mechanism further includes a first washer, which is sleeved on the adjusting rod and located between the side wall of the nut and the lifting ring.

[0011] As an optional implementation, the end of the adjusting section has a threaded hole, and the adjusting mechanism also includes a limit screw and a second washer. The limit screw is threaded into the threaded hole, and the second washer is sleeved on the limit screw.

[0012] As an optional implementation, the lifting ring includes a body and a positioning structure. The body is annular, and the outer side of the body along its own radial direction has a first retaining edge extending radially along the body. The end of the first retaining edge has a second retaining edge extending axially along the body. The first retaining edge and the second retaining edge form a positioning structure. An adjustment mechanism is disposed on the body. When lifting the main bearing, the first retaining edge abuts against the end face of the inner ring of the main bearing along the axial direction of the main bearing, and the second retaining edge surrounds the outer periphery of the roller retaining edge.

[0013] As an alternative implementation, the first stop has a limiting groove, into which a portion of the hook extends.

[0014] As an optional implementation, the hook includes a hook handle and a hook body. One end of the hook handle is detachably connected to a connecting section on an adjusting rod, and the other end of the hook handle is integrally formed with the hook body. The side of the hook handle facing the body has a limiting protrusion that extends into a limiting groove.

[0015] As an optional implementation, the side of the second stop away from the first stop has a detection notch corresponding to the position of the hook.

[0016] Secondly, this application also provides a wind turbine generator, including the hoisting fixture described in the first aspect.

[0017] The lifting fixture provided in this application allows for the following operation: First, the adjustment mechanisms of each group can be operated to drive the hooks to extend radially outward from the lifting ring, aligning all hooks with the gaps between adjacent rollers of the main bearing. Then, the lifting ring is lowered, causing each hook to penetrate the internal space of the main bearing through the corresponding roller gaps. Next, the adjustment mechanisms are operated in reverse to drive all hooks to retract radially towards the center of the lifting ring, moving the hooks to the position below the inner ring roller flange of the main bearing, thus locking and limiting the inner ring of the main bearing. Finally, the lifting ring is pulled upward using the lifting equipment. When the hook engages and tightens with the roller guard, it relies on the roller guard to support the weight of the main bearing to complete the lifting, transportation, and assembly. The entire lifting process does not require opening a lifting hole on the inner ring end face of the main bearing, avoiding the disadvantage of reducing the structural strength of the main bearing due to the opening, and improving the structural strength of the main bearing. The assembly method of the hook inserting through the roller gap and radially closing to lock the guard does not require reserving space for placing lifting tools around the bearing, which is suitable for the narrow and enclosed assembly environment of the main spindle system, effectively improving the positioning accuracy and safety of the main bearing lifting operation in a narrow space. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a first type of hoisting fixture provided in an embodiment of this application;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of a second type of hoisting fixture provided in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the structure of the lifting components in the lifting fixture provided in the embodiments of this application;

[0023] Figure 5 This is a schematic diagram of the lifting ring in the lifting fixture provided in the embodiments of this application;

[0024] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0025] Figure 7 for Figure 1 Top view;

[0026] Figure 8 for Figure 7A sectional view;

[0027] Figure 9 for Figure 8 Enlarged view of point C in the middle;

[0028] Figure 10 A schematic diagram of the hoisting tooling used to hoist the main bearing of a wind turbine generator as provided in the embodiments of this application;

[0029] Figure 11 for Figure 10 Enlarged view of point D in the middle.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Lifting fixture; 110. Lifting ring; 111. Mounting through hole; 112. Body; 113. Positioning structure; 1131. First retaining edge; 1132. Second retaining edge; 1133. Limiting groove; 1134. Inspection notch; 114. Lifting connection part; 120. Lifting assembly; 121. Adjusting rod; 1211. Connecting section; 1212. Mating section; 1213. Adjusting section; 122. Nut; 123. First washer; 124. Lifting hook; 1241. Hook handle; 1242. Hook body; 1243. Protrusion; 125. Limiting screw; 126. Second washer; 200. Main bearing; 210. Inner ring; 211. Roller retaining edge; 220. Roller. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In this application, the terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0034] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0035] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0037] As the core load-bearing component of the wind turbine's transmission system, the main shaft assembly contains the main bearing, a critical load-bearing part that bears the radial and axial loads during turbine operation. The assembly accuracy directly determines the overall reliability of the turbine. Due to the internal structural layout of the main shaft system, the space around the main bearing after assembly is small and enclosed, making it unsuitable for installation using pallet-type lifting tools. Currently, the industry standard assembly method involves pre-drilling lifting holes on the large end face of the inner ring of the main bearing. During assembly, lifting eye bolts are screwed into these holes, and lifting tools and chains are used to connect the lifting eye bolts to complete the lifting, transportation, and alignment of the main bearing. However, creating lifting holes in the main bearing reduces its structural strength.

[0038] In view of this, this application provides a lifting fixture. During lifting operations, the adjustment mechanisms can be operated to drive the hooks to extend radially outward from the lifting ring, aligning all hooks with the gaps between adjacent rollers of the main bearing. Then, the lifting ring is lowered, causing each hook to penetrate the internal space of the main bearing through the corresponding roller gaps. Next, the adjustment mechanisms are operated in reverse to drive all hooks radially towards the center of the lifting ring, moving the hooks to the lower side of the inner ring roller flange of the main bearing, thus achieving a limiting and locking effect on the inner ring of the main bearing. Afterwards, [further details are needed]. When the lifting equipment pulls the lifting ring upwards, the hook engages and clamps the roller guard, and relies on the roller guard to support the weight of the main bearing to complete the lifting, transfer, and assembly. The entire lifting process does not require opening a lifting hole on the inner ring end face of the main bearing, avoiding the disadvantage of reducing the structural strength of the main bearing due to the opening. The assembly method of the hook inserting through the roller gap and radially closing to clamp the guard does not require reserving space for placing lifting tools around the bearing, which is suitable for the narrow and enclosed assembly environment of the main shaft system, effectively improving the positioning accuracy and safety of the main bearing lifting operation in a narrow space.

[0039] Figure 1 This is a schematic diagram of a first type of hoisting fixture provided in an embodiment of this application; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of a second type of hoisting fixture provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the lifting components in the lifting fixture provided in the embodiments of this application; Figure 5 This is a schematic diagram of the lifting ring in the lifting fixture provided in the embodiments of this application; Figure 6 for Figure 1 Enlarged view of point B in the middle; Figure 7 for Figure 1 Top view; Figure 8 for Figure 7 A sectional view; Figure 9 for Figure 8 Enlarged view of point C in the middle; Figure 10 A schematic diagram of the hoisting tooling used to hoist the main bearing of a wind turbine generator as provided in the embodiments of this application; Figure 11 for Figure 10 Enlarged view of point D in the middle.

[0040] You can refer to this. Figures 1 to 11 This application provides a lifting fixture 100 for lifting the main bearing 200 of a wind turbine generator set. The inner ring 210 of the main bearing 200 has a roller flange 211. The lifting fixture 100 includes:

[0041] The lifting eye 110 is sized to match the main bearing 200. The lifting eye 110 is circumferentially provided with a plurality of lifting connection parts 114 for connecting with the lifting rope.

[0042] Multiple lifting assemblies 120 are evenly arranged around the circumference of the lifting ring 110. Each lifting assembly 120 includes an adjustment mechanism and a hook 124. The adjustment mechanism is movably connected to the lifting ring 110 radially, and the hook 124 is fixedly connected to the adjustment mechanism. The hook 124 is configured to extend into the main bearing 200 along the gap between two adjacent rollers 220. The adjustment mechanism adjusts the radial position of the hook 124 along the lifting ring 110, thereby hooking and locking the hook 124 at the roller guard 211.

[0043] During hoisting operations, the hoisting fixture 100 provided in this embodiment can first operate each set of adjustment mechanisms to drive the hooks 124 to extend radially outward from the lifting ring 110, so that all hooks 124 are aligned one-to-one with the gap positions of adjacent rollers 220 of the main bearing 200. Then, the lifting ring 110 is lowered, causing each hook 124 to penetrate into the internal space of the main bearing 200 through the corresponding gaps of the rollers 220. Then, the adjustment mechanisms are operated in reverse to drive all hooks 124 to radially retract towards the center of the lifting ring 110, so that the hooks 124 move to the position below the roller guard 211 of the inner ring 210 of the main bearing 200, thereby achieving the limiting and locking of the inner ring 210 of the main bearing 200. Afterward, when the lifting ring 110 is lifted upward by the lifting equipment, the hooks 124 are engaged with the hooks. The main bearing 200 is lifted, transported, and assembled by relying on the roller guard 211 to support its own weight. The entire lifting process does not require opening a lifting hole on the end face of the inner ring 210 of the main bearing 200, thus avoiding the disadvantage of reducing the structural strength of the main bearing 200 by opening a hole and improving the structural strength of the main bearing 200. This avoids the risk of the main bearing 200 cracking at the lifting hole during operation, which is caused by setting a lifting hole on the main bearing 200 in the prior art. The assembly method of the hook 124 passing through the gap of the roller 220 and radially closing to clamp the guard does not require reserving space for the placement of lifting tools around the bearing. It is suitable for the narrow and confined assembly environment inside the main spindle system and effectively improves the lifting positioning accuracy and lifting operation safety of the main bearing 200 in a narrow space.

[0044] In the above embodiment, the lifting ring 110 may have a mounting through hole 111 extending radially along the lifting ring 110. The adjustment mechanism includes an adjustment rod 121 and a nut 122. The adjustment rod 121 includes a connecting section 1211, a mating section 1212, and an adjustment section 1213 in sequence along its length direction. The cross-section of the connecting section 1211 is larger than the cross-section of the mounting through hole 111. The cross-section of the mating section 1212 matches the cross-section of the mounting through hole 111. The mating section 1212 is configured to pass through the mounting through hole 111. The adjustment section 1213 has threads. The nut 122 is screwed onto the adjustment section 1213. The hook 124 is fixedly connected to the connecting section 1211. It is understandable that a radial sliding fit can be achieved by using a mating section 1212 with a cross-section matching the mounting through hole 111, which passes through the mounting through hole 111 of the lifting ring 110. An axial limiting stop can be formed by the connecting section 1211 with a cross-section larger than the mounting through hole 111, preventing the adjusting rod 121 from dislodging from the lifting ring 110. Simultaneously, a threaded locking and positioning can be achieved by screwing a nut 122 onto the outside of the adjusting section 1213. The structural arrangement of the hook 124 fixed to the connecting section 1211 of the adjusting rod 121 allows the adjusting rod 121 to be driven along the lifting ring 110 by rotating the nut 122. The radial smooth sliding precisely adjusts the radial extension and retraction position of the hook 124, achieving the precise alignment adjustment requirements for the hook 124 to extend into the gap of the roller 220 and engage with the roller guard 211. The overall structure is simple and compact, easy to disassemble and assemble, and suitable for the operation conditions of the main shaft system in a narrow working space. Moreover, the threaded adjustment method has high adjustment accuracy and strong locking stability, which can ensure that multiple sets of hooks 124 are synchronously and evenly stressed, effectively avoiding the hook 124 from shifting or loosening during the lifting process, and improving the alignment accuracy of the main bearing 200 lifting operation and the overall lifting safety and reliability.

[0045] There are several ways to fix the hook 124 to the connecting section 1211. For example, the hook 124 can be welded to the connecting section 1211, or the hook 124 can be integrally formed with the connecting section 1211. Welding or integral forming methods provide a reliable connection and can effectively prevent relative swaying between the hook 124 and the connecting section 1211. The hook 124 can also be detachably connected to the connecting section 1211 by bolts to facilitate replacement or maintenance of the hook 124. Furthermore, when the hook 124 is fixed to the connecting section 1211 by bolts, anti-loosening washers can be placed on the bolts to prevent the hook 124 from loosening relative to the connecting section 1211. Of course, the hook 124 can also be fixedly connected to the connecting section 1211 by other structures; no specific limitations are made here.

[0046] In the above embodiment, the adjusting section 1213 can extend to the radially inner side of the lifting ring 110, the connecting section 1211 extends to the radially outer side of the lifting ring 110, and the hook 124 extends along one side of the axial direction of the lifting ring 110. The operator can directly operate the nut 122 above the radially inner side of the lifting ring 110, driving the adjusting rod 121 to slide smoothly radially along the lifting ring 110 via threaded transmission. This, in turn, drives the hook 124 on the radially outer side of the lifting ring 110 to precisely complete the adjustment action of extending the alignment roller 220 gap outward and retracting to clamp the roller retainer 211 inward. The split layout of the inner adjusting nut 122 and the outer hook 124 effectively avoids interference between the adjustment operation and the bearing structure and the confined space of the spindle system, improving the ease of operation in confined and enclosed working conditions; at the same time, the hook 1213... The structure arranged along the axial direction of the lifting ring 110 ensures that the hook 124 can be vertically and smoothly inserted into the gap between the adjacent rollers 220 of the main bearing 200 when it is lowered, without rubbing or bumping against the rollers 220, cage, or other structures. It can be precisely attached to the lower side of the roller guard 211 for stable locking. Moreover, the axial and radial layered structure can vertically and evenly transmit the lifting load to the roller guard 211, avoiding the hook 124 from being biased or swaying under force, effectively improving the uniformity of the synchronous force on multiple sets of hooks 124, and enhancing the overall locking stability of the tooling and the safety of the lifting operation.

[0047] In the above embodiments, the adjusting mechanism may further include a first washer 123, which is sleeved on the adjusting rod 121 and located between the nut 122 and the side wall of the lifting ring 110. By positioning the first washer 123 between the nut 122 and the side wall of the lifting ring 110, during the tightening and locking process of the nut 122, the first washer 123 effectively isolates the nut 122 from direct hard contact with the lifting ring 110, preventing extrusion wear, scratches, and stress concentration on the side wall of the lifting ring 110 during repeated tightening and adjustment of the nut 122, thus protecting the structural integrity and flatness of the lifting ring 110. Simultaneously, the first washer 123 increases the contact bearing area between the nut 122 and the side wall of the lifting ring 110, dispersing the local extrusion force generated by the tightening of the nut 122. This improves the tightness and positioning stability of the nut 122 after locking, effectively preventing the nut 122 from loosening or slipping under lifting vibration conditions, and eliminating the risk of radial positioning deviation and loosening of the hook 124. In addition, the shim can compensate for the small planar gaps and machining errors of the assembly contact surface, so that the locking degree of multiple adjustment mechanisms is consistent, ensuring that the extension and retraction stroke of each hook 124 is uniform and the force is even, further improving the adjustment accuracy, structural durability and overall stability and safety of the main bearing 200 during the lifting process of the entire tooling.

[0048] In the above embodiment, the end of the adjusting section 1213 may have a threaded hole. The adjusting mechanism also includes a limiting screw 125 and a second washer 126. The limiting screw 125 is threaded into the threaded hole, and the second washer 126 is sleeved on the limiting screw 125. A limiting screw 125 with the second washer 126 passing through it is threadedly fastened to the threaded hole. The limiting screw 125 and the second washer 126 are both located on the side of the nut 122 away from the lifting ring 110. After tightening the limiting screw 125, the second washer 126 isolates the limiting screw 125 from the direct contact between the limiting screw 125 and the nut 122. On the one hand, it can form an axial limiting lock on the nut 122, preventing the nut 122 from slipping and loosening from the threaded end of the adjusting section 1213 under the action of hoisting vibration and load impact, further consolidating the locking and positioning effect of the nut 122 on the adjusting rod 121. On the other hand, the second washer 126 is also used to lock the nut 122. The gasket 126 can disperse the clamping stress of the limit screw 125, prevent the limit screw 125 from scratching the end face of the adjusting rod 121 during the locking operation, compensate for the assembly clearance error caused by the machining of parts, and form a double-sided gasket protective locking structure with the first gasket 123 to achieve bidirectional limiting and anti-loosening at both ends of the nut 122, ensure that the radial position of multiple adjusting rods 121 is constant for a long time, and keep the locking force of each hook 124 on the roller guard 211 consistent, effectively avoiding the hidden danger of hook 124 shifting and disengaging during the lifting operation, and improving the structural stability of the tooling and the safety factor of the lifting operation for long-term repeated use.

[0049] In the above embodiments, the lifting ring 110 may include a body 112 and a positioning structure 113. The body 112 is annular, and the outer side of the body 112 along its own radial direction has a first retaining edge 1131 extending radially along the body 112. The end of the first retaining edge 1131 has a second retaining edge 1132 extending axially along the body 112. The first retaining edge 1131 and the second retaining edge 1132 form the positioning structure 113. An adjustment mechanism is disposed on the body 112. When lifting the main bearing 200, the first retaining edge 1131 abuts against the end face of the inner ring 210 of the main bearing 200 along the axial direction of the main bearing 200, and the second retaining edge 1132 surrounds the outer periphery of the roller retaining edge 211. It is understandable that during the lowering of the tooling in the hoisting operation, the radially arranged first retaining edge 1131 axially abuts against the end face of the inner ring 210 of the main bearing 200, which can achieve overall axial positioning of the lifting ring 110. The second retaining edge 1132 is arranged around the outer perimeter of the roller retaining edge 211, which can form a circumferential positioning constraint. Relying on the double-layer retaining edge positioning effect of the positioning structure 113, the coaxial alignment of the lifting ring 110 relative to the main bearing 200 can be quickly completed, avoiding radial displacement or misalignment of the lifting ring 110 during the lowering of the tooling. The oblique misalignment ensures that the hooks 124 can be accurately aligned with the gaps of the rollers 220 and smoothly inserted. At the same time, during the lifting stage, the first stop 1131 bears part of the axial limiting force, and the second stop 1132 acts as a protective barrier outside the roller stop 211 to prevent the hooks 124 from slipping laterally under load. This further optimizes the reliability of the engagement between the hooks 124 and the roller stop 211, reduces the time spent on alignment adjustment during lifting, and improves the efficiency of tooling placement and the overall stability of the lifting in confined spaces.

[0050] In the above embodiment, the first retaining edge 1131 may have a limiting groove 1133, and a part of the hook 124 extends into the limiting groove 1133. A limiting groove 1133 is opened on the first retaining edge 1131 and the hook 124 is partially embedded in the limiting groove 1133. The groove wall of the limiting groove 1133 can form a lateral constraint on the hook 124. When the hook 124 moves radially along the lifting ring 110 with the adjustment mechanism, it is restricted from swinging and deflecting by the limiting groove 1133, and always maintains a fixed posture and moves radially forward and backward smoothly. This ensures that when the hook 124 extends outward, it is accurately aligned with the gap of the roller 220, and when it retracts, it is smoothly locked into the lower side of the roller retaining edge 211. This avoids the problem of misalignment and improper engagement caused by the twisting and skewing of the hook 124. In conjunction with the positioning structure 113 composed of the first retaining edge 1131 and the second retaining edge 1132 of the lifting ring 110, the movement trajectory and assembly position of all hooks 124 are unified, ensuring that each hook 124 is subjected to uniform force, and further improving the adjustment accuracy and hoisting reliability of the hook 124.

[0051] In the above embodiments, the hook 124 may include a hook handle 1241 and a hook body 1242. One end of the hook handle 1241 is detachably connected to a connecting section 1211 on the adjusting rod 121, and the other end of the hook handle 1241 is integrally formed with a hook body 1242. The side of the hook handle 1241 facing the body 112 has a limiting protrusion 1243, which extends into a limiting groove 1133. It is understandable that during the process of rotating the nut 122 to drive the adjusting rod 121 to drive the hook 124 to move radially along the lifting ring 110, the limiting protrusion 1243 is laterally constrained by the wall of the limiting groove 1133, which can limit the circumferential deflection and up-and-down tilting of the hook handle 1241, so that the hook 124 always maintains a fixed posture and slides smoothly radially. This ensures that when the hook body 1242 extends outward, it can accurately align with the gap between the adjacent rollers 220, and when it retracts inward, the hook body 1242 can smoothly engage under the roller guard 211, effectively preventing misalignment caused by the hook 124 being skewed or misaligned. Issues such as failure and insecure mounting are addressed by using a detachable connection between the hook handle 1241 and the adjusting rod 121. When the hook body 1242 is worn, deformed, or damaged, the hook 124 can be replaced separately without disassembling the entire tooling or replacing the adjusting rod 121, thus reducing tooling maintenance costs. The integrated structure of the hook handle 1241 and the hook body 1242 enhances the overall bending and tensile strength of the hook 124, making it less prone to breakage or deformation failure of the hook body 1242 under lifting load conditions. This further improves the positioning accuracy and operational safety and reliability of the main bearing 200 lifting.

[0052] In the above embodiment, the side of the second retaining edge 1132 away from the first retaining edge 1131 may have a detection notch 1134 corresponding to the position of the hook 124. A detection notch 1134 corresponding to the hook 124 is opened on the side of the second retaining edge 1132 away from the first retaining edge 1131. The notch size is suitable for inserting tools such as feeler gauges. After the hook 124 is retracted and positioned against the roller retaining edge 211, the operator can insert a feeler gauge through the detection notch 1134 to accurately measure the fit clearance between the hook body 1242 and the roller retaining edge 211, measure the tightness of the hook 124, and visually judge whether the hook 124 is fully in place, whether there is any loose engagement, excessive gap, or other unqualified working conditions. This ensures that all hooks 124 are evenly and reliably engaged with the roller retaining edge 211, avoiding the risk of bearing fall due to improper engagement, and effectively improving the accuracy of lifting quality control and operational safety.

[0053] Furthermore, this application embodiment also provides a wind turbine generator set, including the lifting fixture 100 in the above embodiment. During the lifting operation, the adjustment mechanisms of each group can be operated to drive the hooks 124 to extend radially outward from the lifting ring 110, so that all the hooks 124 are aligned one-to-one with the gap positions of the adjacent rollers 220 of the main bearing 200. Then, the lifting ring 110 is lowered, causing each hook 124 to penetrate into the internal space of the main bearing 200 through the gaps of the corresponding rollers 220. Then, the adjustment mechanisms are operated in reverse to drive all the hooks 124 to radially retract toward the center of the lifting ring 110, so that the hooks 124 move to the lower side of the roller retainer 211 of the inner ring 210 of the main bearing 200. The inner ring 210 of the main bearing 200 is now locked and limited. Then, when the lifting ring 110 is lifted upward by the lifting equipment, the hook 124 engages with and clamps the roller guard 211 and relies on the roller guard 211 to support the weight of the main bearing 200 to complete the lifting, transfer and assembly. The entire lifting process does not require opening a lifting hole on the end face of the inner ring 210 of the main bearing 200, avoiding the disadvantage of reducing the structural strength of the main bearing 200 due to the opening. The assembly method of the hook 124 passing through the gap of the roller 220 and radially closing to clamp the guard does not require reserving space for the placement of lifting tools around the bearing. It is suitable for the small and confined assembly environment inside the nacelle and improves the reliability of the wind turbine and the safety during installation.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various implementations of this application.

Claims

1. A hoisting fixture, characterized in that, The main bearing (200) for hoisting wind turbine units, the inner ring (210) of the main bearing (200) having roller flanges (211), the hoisting fixture comprising: The lifting ring (110) is sized to match the main bearing (200), and the lifting ring (110) is provided with a plurality of lifting connection parts (114) evenly arranged in the circumference for connecting with the lifting rope. Multiple lifting assemblies (120) are evenly arranged around the circumference of the lifting ring (110). Each lifting assembly (120) includes an adjustment mechanism and a hook (124). The adjustment mechanism is movably connected to the lifting ring (110) radially. The hook (124) is fixedly connected to the adjustment mechanism. The hook (124) is configured to extend into the main bearing (200) along the gap between two adjacent rollers. The adjustment mechanism adjusts the radial position of the hook (124) along the lifting ring (110) to hook and lock the hook (124) at the roller flange (211).

2. The hoisting fixture according to claim 1, characterized in that, The lifting ring (110) has a mounting through hole (111) extending radially along the lifting ring (110). The adjusting mechanism includes an adjusting rod (121) and a nut (122). The adjusting rod (121) includes a connecting section (1211), a mating section (1212), and an adjusting section (1213) in sequence along its length. The cross-section of the connecting section (1211) is larger than the cross-section of the mounting through hole (111). The cross-section of the mating section (1212) matches the cross-section of the mounting through hole (111). The mating section (1212) is configured to pass through the mounting through hole (111). The adjusting section (1213) has a thread. The nut (122) is screwed onto the adjusting section (1213). The hook (124) is fixedly connected to the connecting section (1211).

3. The hoisting fixture according to claim 2, characterized in that, The adjusting section (1213) extends to the radially inner side of the lifting ring (110), the connecting section (1211) extends to the radially outer side of the lifting ring (110), and the hook (124) extends along one side of the axial direction of the lifting ring (110).

4. The hoisting fixture according to claim 3, characterized in that, The adjustment mechanism further includes a first washer (123), which is sleeved on the adjustment rod (121) and located between the nut (122) and the side wall of the lifting ring (110).

5. The hoisting fixture according to claim 4, characterized in that, The end of the adjustment section (1213) has a threaded hole, and the adjustment mechanism also includes a limiting screw (125) and a second washer (126). The limiting screw (125) is threaded into the threaded hole, and the second washer (126) is sleeved on the limiting screw (125).

6. The hoisting fixture according to any one of claims 2 to 5, characterized in that, The lifting ring (110) includes a body (112) and a positioning structure (113). The body (112) is annular. The body (112) has a first flange (1131) extending radially along the outer side of itself. The end of the first flange (1131) has a second flange (1132) extending axially along the body (112). The first flange (1131) and the second flange (1132) form the positioning structure (113). The adjustment mechanism is disposed on the body (112). When the main bearing (200) is lifted, the first flange (1131) abuts against the end face of the inner ring (210) of the main bearing (200) along the axial direction of the main bearing (200). The second flange (1132) surrounds the outer periphery of the roller flange (211).

7. The hoisting fixture according to claim 6, characterized in that, The first flange (1131) has a limiting groove (1133), and a portion of the hook (124) extends into the limiting groove (1133).

8. The hoisting fixture according to claim 7, characterized in that, The hook (124) includes a hook handle (1241) and a hook body (1242). One end of the hook handle (1241) is detachably connected to the connecting section (1211) on the adjusting rod (121). The other end of the hook handle (1241) is integrally formed with the hook body (1242). The hook handle (1241) has a limiting protrusion (1243) on the side facing the body (112), and the limiting protrusion (1243) extends into the limiting groove (1133).

9. The hoisting fixture according to claim 6, characterized in that, The second stop (1132) has a detection notch (1134) on the side away from the first stop (1131) that corresponds to the position of the hook (124).

10. A wind turbine generator set, characterized in that, Includes the lifting fixture described in any one of claims 1 to 9.

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