Hydraulic round supporting device for wind power main shaft bearing ring blank

Abstract

The utility model discloses a kind of hydraulic round supporting devices for wind power main shaft bearing ring blank, it is related to wind power bearing ring blank processing equipment technical field, including base, the top of base is provided with round supporting mechanism, the round supporting mechanism includes placing table, the surface of placing table is equipped with rectangular groove, and the center of top is provided with round supporting assembly, the inner chamber of rectangular groove is provided with centering assembly;Among them, the bottom of placing table is fixedly connected with base, the number of rectangular groove is multiple, and evenly distributed in annular array. The utility model is provided with round supporting mechanism, solve the hydraulic round supporting device of the wind power bearing ring blank of existing wind power bearing ring blank when in use, lack blank centering function, blank is only placed on moving frame by artificial, prone to the phenomenon that blank center and lifting seat center are misaligned, when round supporting, eccentric blank can cause local excessive stress, not only affect roundness precision, also can cause the problem of blank deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine bearing ring blank processing equipment, specifically a hydraulic rounding device for wind turbine main shaft bearing ring blanks. Background Technology

[0002] Wind power generation technology is increasingly widely used in modern society. Bearings are a core component of wind turbine generators, distributed throughout various subsystems including yaw, pitch, drivetrain, and generator. These include yaw bearings, pitch bearings, main shaft bearings, speed increaser bearings, and generator bearings. In the manufacturing process of wind turbine bearing rings, the metal billet is first forged, then processed into a ring shape using a ring rolling mill, followed by heat treatment and machining to complete the bearing ring production. However, the roundness error of the metal billet after being processed into a ring shape using the ring rolling mill is relatively large, resulting in a large amount of cutting during subsequent turning, leading to a significant time commitment and impacting production efficiency.

[0003] A search revealed that Chinese patent application number 202321150179.X discloses a hydraulic rounding device for wind turbine bearing ring blanks, relating to the technical field of wind turbine bearing ring blank processing equipment. Specifically, the device includes a vertically lifting seat with a regular polygonal cross-section, the dimensions of which decrease sequentially from top to bottom. Several movable frames are evenly distributed around the lifting seat, with the end face of each frame near the lifting seat being inclined and fitting against the outer wall. When the lifting seat rises or falls, it drives the outer movable frames to move linearly in the horizontal direction, with the axis of movement perpendicular to and intersecting the axis of the lifting seat. Several detachable support plates are installed on each movable frame. This invention has the advantages of simple structure and convenient operation. Using hydraulic drive, it further rounds the ring blank processed by the ring rolling mill, ensuring the roundness meets design requirements. This reduces the cutting amount during subsequent turning, shortens processing time, and improves production efficiency.

[0004] The problem with the existing technology is that the existing hydraulic rounding device for wind turbine bearing ring blanks lacks the function of blank centering. The blank is placed on the moving frame manually, which easily leads to misalignment between the blank center and the center of the lifting seat. During rounding, the eccentric blank will cause excessive local stress, which will not only affect the roundness accuracy, but may also cause the blank to deform. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a hydraulic rounding device for annular blanks of wind turbine main shaft bearings. This device has the advantage of centering the blank and preventing excessive local stress caused by an eccentric blank during rounding, which would affect the roundness accuracy. It solves the problem that existing hydraulic rounding devices for annular blanks of wind turbine bearings lack the function of centering the blank. The blank is placed manually on the moving frame, which easily leads to misalignment between the center of the blank and the center of the lifting seat. During rounding, an eccentric blank will cause excessive local stress, which not only affects the roundness accuracy but may also cause the blank to deform.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic rounding device for annular blanks of wind turbine main shaft bearings, comprising a base, wherein a rounding mechanism is provided on the top of the base. The circular support mechanism includes a placement platform, the surface of which is provided with a rectangular groove, and a circular support component is provided at the center of the top. The inner cavity of the rectangular groove is provided with a centering component that works in conjunction with the circular support component. The bottom of the placement platform is fixedly connected to the base, and there are multiple rectangular slots that are evenly distributed in a circular array.

[0007] As a preferred embodiment of this utility model, the supporting assembly includes a lifting plate, the surface of which has an opening, and a hydraulic cylinder is provided at the bottom. A connecting rod is rotatably connected to the inner cavity of the opening. The bottom of the hydraulic cylinder is located in the inner cavity of the base and is fixedly connected to the base. The output shaft passes through the placement platform and is fixedly connected to the lifting plate. A push plate is rotatably connected to the side of the connecting rod away from the lifting plate.

[0008] As a preferred embodiment of this utility model, the number of openings is multiple and they are evenly distributed in a ring array. A limiting block is fixedly connected to the bottom of the push plate. The bottom of the limiting block passes through the rectangular groove and extends into the inner cavity of the rectangular groove, and contacts the inner wall of the rectangular groove.

[0009] In a preferred embodiment of this utility model, a first slider is fixedly connected to both the left and right sides of the limiting block, and a sliding groove is provided on both the left and right sides of the inner wall of the rectangular groove. The side of the first slider away from the limiting block is slidably connected to the sliding groove.

[0010] As a preferred embodiment of the present invention, the centering component includes a handwheel, a screw, and an adjusting block. One end of the screw is rotatably connected to the limiting block, while the other end passes through the rectangular groove and extends to the outside of the rectangular groove to be fixedly connected to the handwheel. The adjusting block is sleeved on the surface of the screw and threadedly connected to the screw, and a positioning post is fixedly connected to the top.

[0011] As a preferred embodiment of this utility model, a telescopic cover is fitted onto the surface of the screw, and the two ends of the telescopic cover are fixedly connected to an adjusting block and a limiting block, respectively.

[0012] In a preferred embodiment of this invention, a second slider is fixedly connected to both the left and right sides of the adjusting block, and the side of the second slider away from the adjusting block is slidably connected to the slide groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model solves the problem of existing hydraulic rounding devices for wind turbine bearing ring blanks lacking blank centering function during use by setting a rounding mechanism. The blank is placed on the moving frame manually, which easily leads to misalignment between the blank center and the lifting seat center. During rounding, the eccentric blank will cause excessive local stress, which not only affects the roundness accuracy but may also cause blank deformation. The present invention achieves the effect of accurately centering the blank first and then uniformly rounding it, ensuring the roundness accuracy of the wind turbine main shaft bearing ring blank and reducing deformation loss.

[0014] 2. This utility model achieves uniform circular expansion driven by hydraulic force by setting up a circular expansion component. The output shaft of the hydraulic cylinder drives the lifting plate to rise and fall. The lifting plate pushes the push plate outward synchronously through multiple annular array connecting rods. After the push plate contacts the inner wall of the billet, it applies force evenly to ensure that the billet is subjected to consistent force in the circumferential direction. The limiting block at the bottom of the push plate contacts the inner wall of the rectangular groove, and the first slider on both sides of the limiting block slides along the groove of the rectangular groove, restricting the push plate to move smoothly only in the radial direction, and avoiding the billet from being locally compressed and deformed due to the tilting of the push plate.

[0015] 3. This utility model, by setting a centering component, can center the billet, ensuring the roundness accuracy of the annular billet of the wind turbine main shaft bearing, reducing deformation loss. Rotating the handwheel drives the screw to rotate, and the threaded engagement between the screw and the adjusting block is converted into the radial movement of the adjusting block along the rectangular groove. The positioning post on the top of the adjusting block moves closer to or further away from the billet, pushing it to align with the center from the outside of the billet. The telescopic cover sleeved on the surface of the screw is fixed at both ends to the adjusting block and the limiting block, which can effectively prevent metal debris and dust generated during the rounding process from entering the screw thread, avoiding thread wear or jamming. At the same time, the second sliders on both sides of the adjusting block slide along the slide groove to ensure smooth movement of the adjusting block, further ensuring the centering accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the placement platform structure; Figure 3 This is a schematic diagram of the structure of the circular support component; Figure 4 This is a schematic diagram of the centering component structure.

[0017] In the diagram: 1. Base; 2. Rounding mechanism; 3. Limiting block; 4. First slider; 5. Slide groove; 6. Positioning column; 7. Telescopic cover; 8. Second slider; 21. Placement platform; 22. Rectangular groove; 23. Rounding assembly; 24. Centering assembly; 231. Lifting plate; 232. Opening; 233. Hydraulic cylinder; 234. Connecting rod; 235. Push plate; 241. Handwheel; 242. Screw; 243. Adjusting block. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0022] Example 1: Refer to Figure 1-4 This is the first embodiment of the present invention, which provides a hydraulic rounding device for annular blanks of wind turbine main shaft bearings, including a base 1, and a rounding mechanism 2 is provided on the top of the base 1. The rounding mechanism 2 includes a placement platform 21, a rectangular groove 22 is provided on the surface of the placement platform 21, and a rounding component 23 is provided at the center of the top. A centering component 24 is provided in the inner cavity of the rectangular groove 22 to cooperate with the rounding component 23. The bottom of the placement platform 21 is fixedly connected to the base 1, and there are multiple rectangular slots 22, which are evenly distributed in a ring array.

[0023] Specifically, by setting up the rounding mechanism 2, the problem of lacking the function of centering the billet in the existing hydraulic rounding device for wind turbine bearing ring billets is solved. The billet is placed on the moving frame manually, which easily leads to misalignment between the center of the billet and the center of the lifting seat. During rounding, the eccentric billet will cause excessive local stress, which will not only affect the roundness accuracy, but may also cause the billet to deform. The solution achieves the effect of accurately centering the billet first and then uniformly rounding it, ensuring the roundness accuracy of the wind turbine main shaft bearing ring billet and reducing deformation loss.

[0024] Furthermore, before processing, the annular blank is placed on top of the placement table 21, and the centering component 24 is activated to push the center of the blank from the outside to align with the center of the rounding component 23. After centering is completed, the rounding component 23 is activated, and multiple annularly distributed pushing components apply force outward synchronously to make the blank deform uniformly in the circumferential direction, thus completing the rounding and avoiding the problem of large precision deviation caused by eccentricity.

[0025] Example 2: In the second embodiment of this utility model, the supporting assembly 23 includes a lifting plate 231. The surface of the lifting plate 231 has an opening 232, and a hydraulic cylinder 233 is provided at the bottom. A connecting rod 234 is rotatably connected to the inner cavity of the opening 232. The bottom of the hydraulic cylinder 233 is located in the inner cavity of the base 1 and is fixedly connected to the base 1. The output shaft passes through the placement platform 21 and is fixedly connected to the lifting plate 231. A push plate 235 is rotatably connected to the side of the connecting rod 234 away from the lifting plate 231.

[0026] There are multiple openings 232, which are evenly distributed in a ring array. The bottom of the push plate 235 is fixedly connected to the limiting block 3. The bottom of the limiting block 3 passes through the rectangular groove 22 and extends into the inner cavity of the rectangular groove 22, and contacts the inner wall of the rectangular groove 22.

[0027] The left and right sides of the limiting block 3 are fixedly connected to the first slider 4. The left and right sides of the inner wall of the rectangular groove 22 are provided with sliding grooves 5. The side of the first slider 4 away from the limiting block 3 is slidably connected to the sliding groove 5.

[0028] Specifically, by setting the rounding component 23, uniform rounding driven by hydraulics is achieved. The output shaft of the hydraulic cylinder 233 drives the lifting plate 231 to rise and fall. The lifting plate 231 pushes the push plate 235 outward through multiple annular array connecting rods 234. After the push plate 235 contacts the inner wall of the billet, it applies force evenly to ensure that the billet is subjected to consistent force in the circumferential direction. The limiting block 3 at the bottom of the push plate 235 contacts the inner wall of the rectangular groove 22, and the first slider 4 on both sides of the limiting block 3 slides along the sliding groove 5 of the rectangular groove 22, restricting the push plate 235 to move smoothly only in the radial direction, and avoiding the local pressure deformation of the billet caused by the tilting of the push plate 235.

[0029] Furthermore, during the rounding operation, the hydraulic cylinder 233 is activated, and its output shaft retracts downward, causing the lifting plate 231 to descend vertically. During the descent of the lifting plate 231, the connecting rod 234 inside the surface opening 232 rotates around the rotation point. The other end of the connecting rod 234 pushes the push plate 235 to move away from the center of the placement platform 21. The limiting block 3 at the bottom of the push plate 235 moves synchronously with the push plate 235. The first slider 4 slides along the slide groove 5 to ensure that the push plate 235 always moves smoothly in the radial direction without tilting. When the push plate 235 contacts the inner wall of the annular billet, the hydraulic cylinder 233 continuously outputs pressure, and the push plate 235 applies a uniform clamping force to the inner wall of the billet, causing the billet to gradually deform to the preset roundness. After the roundness is completed, the output shaft of the hydraulic cylinder 233 extends, driving the lifting plate 231 to rise, and the connecting rod 234 pulls the push plate 235 to reset, waiting for the next operation.

[0030] Example 3: In the second embodiment of this utility model, the centering component 24 includes a handwheel 241, a screw 242 and an adjusting block 243. One end of the screw 242 is rotatably connected to the limiting block 3, while the other end passes through the rectangular groove 22 and extends to the outside of the rectangular groove 22 and is fixedly connected to the handwheel 241. The adjusting block 243 is sleeved on the surface of the screw 242 and threadedly connected to the screw 242, and a positioning post 6 is fixedly connected to the top.

[0031] The surface of the screw 242 is fitted with a telescopic cover 7, and the two ends of the telescopic cover 7 are fixedly connected to the adjusting block 243 and the limiting block 3, respectively.

[0032] The second slider 8 is fixedly connected to both the left and right sides of the adjusting block 243, and the side of the second slider 8 away from the adjusting block 243 is slidably connected to the slide groove 5.

[0033] Specifically, by setting the centering component 24, the billet can be centered, ensuring the roundness accuracy of the annular billet of the wind turbine main shaft bearing and reducing deformation loss. Rotating the handwheel 241 drives the screw 242 to rotate, and the threaded engagement between the screw 242 and the adjusting block 243 is converted into the radial movement of the adjusting block 243 along the rectangular groove 22. The positioning post 6 on the top of the adjusting block 243 moves closer to or further away from the billet, pushing it to align with the center from the outside of the billet. The telescopic cover 7 sleeved on the surface of the screw 242 is fixed at both ends to the adjusting block 243 and the limiting block 3, which can effectively prevent metal debris and dust generated during the rounding process from entering the threads of the screw 242, avoiding thread wear or jamming. At the same time, the second sliders 8 on both sides of the adjusting block 243 slide along the slide groove 5 to ensure that the adjusting block 243 moves smoothly and further ensures the centering accuracy.

[0034] Furthermore, during centering adjustment, the handwheel 241 is rotated clockwise or counterclockwise according to the inner diameter of the annular billet. When rotating clockwise, the screw 242 drives the adjusting block 243 to move closer to the center of the placement table 21, and the positioning pin 6 moves closer to the billet until the inner side of the multiple sets of positioning pins 6 contacts the outer surface of the billet, pushing the center of the billet to align with the center of the rounding component 23. When rotated counterclockwise, the adjusting block 243 drives the positioning pin 6 to move away from the center, releasing the positioning of the blank. During the adjustment process, the second slider 8 slides along the slide groove 5, restricting the adjusting block 243 to move only radially, thus preventing the adjusting block 243 from shifting due to the rotation of the screw 242. The telescopic cover 7 moves synchronously with the adjusting block 243, always covering the threaded section of the screw 242 to prevent impurities from entering and ensuring a smooth adjustment process without jamming.

[0035] Working principle: During operation, the annular blank of the wind turbine main shaft bearing to be processed is placed stably on the top of the placement platform 21, ensuring that the bottom of the blank is in contact with the surface of the placement platform 21. At this time, the blank is in an uncentered state, and the center may deviate from the center of the rounding component 23. Then, according to the inner diameter of the billet, turn the handwheel 241 on the outer side of the placement platform 21 one by one. Turning the handwheel 241 drives the screw 242 to rotate. The screw 242 and the adjusting block 243 are threaded together, causing the adjusting block 243 to move radially along the rectangular groove 22. The positioning pin 6 on the top of the adjusting block 243 moves towards the billet at the same time. When the inner side of multiple sets of positioning pins 6 are in contact with the outer surface of the billet, continue to fine-tune the handwheel 241. The billet is slowly moved by the thrust of the positioning pins 6 until the center of the billet is aligned with the center of the lifting plate 231 of the rounding component 23. This can be confirmed by visual observation or with the help of calipers. After centering is completed, stop turning the handwheel 241. The adjusting block 243 maintains its position under the self-locking action of the thread. The positioning column 6 continuously limits the blank to prevent the blank from shifting. Start the hydraulic cylinder 233 to begin the rounding operation. The output shaft of the hydraulic cylinder 233 retracts downward, driving the lifting plate 231 to descend vertically. When the lifting plate 231 descends, the connecting rod 234 in the opening 232 on its surface rotates around the rotation point. The other end of the connecting rod 234 pushes the push plate 235 to move away from the center. The limiting block 3 at the bottom of the push plate 235 moves synchronously with the push plate 235 and drives the centering component 24 to move synchronously, so as to avoid affecting the rounding of the blank. The first slider 4 slides along the slide groove 5 of the rectangular groove 22 to ensure that the push plate 235 always moves smoothly in the radial direction without tilting or deviating. When the inner side of the push plate 235 contacts the inner wall of the billet, the hydraulic cylinder 233 continues to output pressure, and the push plate 235 applies a uniform tensioning force to the inner wall of the billet, so that the billet deforms uniformly in the circumferential direction. After the billet reaches the preset roundness, the pressure is maintained for a period of time to ensure that the deformation is stable, and then the output shaft of the hydraulic cylinder 233 is controlled to slowly extend. The output shaft of the hydraulic cylinder 233 extends, driving the lifting plate 231 to rise. The connecting rod 234 pulls the push plate 235 to return to its original position closer to the center. The push plate 235 disengages from the inner wall of the billet. The billet, after being rounded, is removed from the top of the placement table 21 by hand or with the help of hoisting equipment, thus completing the processing.

[0036] In summary, by setting the rounding mechanism 2, the billet can be accurately centered first and then evenly rounded, ensuring the roundness accuracy of the wind turbine main shaft bearing ring billet and reducing deformation loss.

[0037] It should be noted that the hydraulic cylinder and screw are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0038] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0039] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0040] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hydraulic rounding device for annular blanks of wind turbine main shaft bearings, comprising a base (1), characterized in that: The base (1) is provided with a rounding mechanism (2) at its top. The circular support mechanism (2) includes a placement platform (21), the surface of which is provided with a rectangular groove (22), and a circular support component (23) is provided at the center of the top. The inner cavity of the rectangular groove (22) is provided with a centering component (24) that works in conjunction with the circular support component (23). The bottom of the placement platform (21) is fixedly connected to the base (1), and there are multiple rectangular grooves (22) that are evenly distributed in a ring array.

2. The hydraulic rounding device for annular blanks of wind turbine main shaft bearings according to claim 1, characterized in that: The supporting assembly (23) includes a lifting plate (231), the surface of which has an opening (232), and a hydraulic cylinder (233) is provided at the bottom. A connecting rod (234) is rotatably connected to the inner cavity of the opening (232). The bottom of the hydraulic cylinder (233) is located in the inner cavity of the base (1) and is fixedly connected to the base (1). The output shaft passes through the placement platform (21) and is fixedly connected to the lifting plate (231). A push plate (235) is rotatably connected to the side of the connecting rod (234) away from the lifting plate (231).

3. The hydraulic rounding device for annular blanks of wind turbine main shaft bearings according to claim 2, characterized in that: The number of openings (232) is multiple and they are evenly distributed in a ring array. The bottom of the push plate (235) is fixedly connected to a limiting block (3). The bottom of the limiting block (3) passes through the rectangular groove (22) and extends into the inner cavity of the rectangular groove (22), and contacts the inner wall of the rectangular groove (22).

4. The hydraulic rounding device for annular blanks of wind turbine main shaft bearings according to claim 3, characterized in that: The left and right sides of the limiting block (3) are fixedly connected to the first slider (4), and the left and right sides of the inner wall of the rectangular groove (22) are provided with sliding grooves (5). The side of the first slider (4) away from the limiting block (3) is slidably connected to the sliding groove (5).

5. A hydraulic rounding device for annular blanks of wind turbine main shaft bearings according to claim 1, characterized in that: The centering component (24) includes a handwheel (241), a screw (242) and an adjusting block (243). One end of the screw (242) is rotatably connected to the limiting block (3), while the other end passes through the rectangular groove (22) and extends to the outside of the rectangular groove (22) and is fixedly connected to the handwheel (241). The adjusting block (243) is sleeved on the surface of the screw (242) and threadedly connected to the screw (242), and a positioning post (6) is fixedly connected to the top.

6. A hydraulic rounding device for annular blanks of wind turbine main shaft bearings according to claim 5, characterized in that: The screw (242) is fitted with a telescopic cover (7), and the two ends of the telescopic cover (7) are fixedly connected to the adjusting block (243) and the limiting block (3) respectively.

7. A hydraulic rounding device for annular blanks of wind turbine main shaft bearings according to claim 6, characterized in that: The adjustment block (243) is fixedly connected to the left and right sides of the second slider (8), and the side of the second slider (8) away from the adjustment block (243) is slidably connected to the slide groove (5).

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