Wind power blade root flange device

Abstract

The invention discloses a wind power blade root flange device. The wind power blade root flange device comprises a mold structure, a flange structure and a positioning structure. The positioning structure comprises a plurality of first positioning assemblies, each first positioning assembly comprises a connecting piece, an adjusting piece and a limiting piece, the connecting pieces are connected with the flange structure, the adjusting pieces are connected with the connecting pieces, the limiting pieces are connected with the mold structure, each limiting piece comprises a first limiting part and a second limiting part, and each limiting piece is further provided with a groove which is concavely formed in the first direction; at least part of the adjusting part is located in the groove, the first limiting part is used for limiting the position of the adjusting part in the groove in the second direction, and the second limiting part is used for limiting the position of the adjusting part in the groove in the third direction; wherein the first direction is the height direction of the flange structure, the second direction is the axial direction of the flange structure, the accuracy of the position of the embedded bolt sleeve of the blade root is improved, and therefore the wind power blade operates stably.

Description

Technical Field

[0001] This application belongs to the field of wind power, and in particular relates to a root flange device for wind turbine blades. Background Technology

[0002] Wind turbine blades are the core components for capturing wind energy, and their operating status directly affects the efficiency of wind energy utilization. Wind turbine blades are connected to the wind turbine hub via pre-embedded bolt sleeves at the blade root. These pre-embedded bolt sleeves have an internal threaded structure and are connected to the wind turbine hub via bolts.

[0003] The pre-embedded process involves pre-positioning threaded bolt sleeves into the middle of the fiberglass cloth on the blade using a pre-embedded flange. All fiberglass is laid aligned with the pre-embedded flange, and then shaped according to the blade manufacturing process. After the blade is shaped, double-ended bolts are screwed into the pre-embedded bolt sleeves, with the other end connected to the wind turbine hub.

[0004] Currently, the position of the flange structure cannot be precisely adjusted, which reduces the accuracy of the position of the pre-embedded bolt sleeves at the blade root, thus affecting the operation of the wind turbine blades. Summary of the Invention

[0005] The purpose of this application is to provide a wind turbine blade root flange device that can improve the accuracy of the position of the pre-embedded bolt sleeve at the blade root.

[0006] The first aspect of this application provides a root flange device for wind turbine blades. The root flange device for wind turbine blades includes a mold structure, a flange structure, and a positioning structure. The flange structure is provided with a plurality of flange holes. The positioning structure includes a plurality of first positioning components. The flange structure is connected to the mold structure through the first positioning components. The first positioning components include a connector, an adjusting component, and a limiting component. The connector is connected to the flange structure, the adjusting component is connected to the connector, and the limiting component is connected to the mold structure. The limiting component includes a first limiting part and a second limiting part. The limiting component is also provided with a groove that is recessed along a first direction. At least a portion of the adjusting component is located in the groove. The first limiting part is used to limit the position of the adjusting component in the groove along a second direction, and the second limiting part is used to limit the position of the adjusting component in the groove along a third direction. The first direction is the height direction of the flange structure, the second direction is the axial direction of the flange structure, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0007] In some embodiments, the first limiting portion includes a first limiting block and a first locking member. The first limiting block is disposed at one end of the groove along the second direction. The first limiting block is provided with a first through hole through which the first locking member passes. The first through hole extends through the first limiting block along the second direction. The first locking member is used to abut against the adjusting member.

[0008] In some embodiments, the adjusting member includes a first adjusting portion and a second adjusting portion disposed opposite to each other along a second direction, a connecting member disposed between the first adjusting portion and the second adjusting portion, a first locking member abutting against the first adjusting portion, and the height of the first adjusting portion along the first direction being greater than the height of the second adjusting portion along the first direction.

[0009] In some embodiments, there are two second limiting portions, which are respectively disposed at both ends of the groove along a third direction. The second limiting portion includes a moving block, a second limiting block, and a second locking member. The moving block includes a first moving segment and a second moving segment connected to each other. The first moving segment extends along a first direction, and the second moving segment extends along a third direction. The groove includes a bottom wall and two side walls, which are respectively disposed on both sides of the bottom wall along a third direction. The first moving segment abuts against the adjusting member and the bottom wall respectively. The second limiting block is provided with a second through hole through which the second locking member passes. The second through hole extends through the second limiting portion along a third direction, and the second locking member abuts against the second moving segment.

[0010] In some embodiments, the mold structure includes a mold body and a support, the support includes a fixed plate and a plurality of spaced support plates, the fixed plate is connected to the mold body, the support plates are respectively connected to the fixed plate and the mold body, and the limiting member is connected to the fixed plate; the thickness of the fixed plate is greater than or equal to 3cm.

[0011] In some embodiments, the flange structure includes a first flange and a second flange distributed along a first direction. A first half-groove is provided on the side of the first flange facing the second flange, and a second half-groove is provided on the side of the second flange facing the first flange. The first half-groove and the second half-groove are joined together to form a mold closing hole. The positioning structure also includes a second positioning component. The second positioning component includes two mold closing columns spaced apart along a third direction. Each mold closing column includes a column body and protrusions provided at both ends of the column body along the first direction. The column body passes through the mold closing hole, and the protrusions abut against the first flange and the second flange, respectively.

[0012] In some embodiments, the positioning structure further includes a third positioning component, which includes a positioning post, a fixing block, and a third locking member. The positioning post is connected to the mold structure, the fixing block is connected to the flange structure, the fixing block has a strip hole, the positioning post has a positioning hole, and the third locking member is used to pass through the strip hole and the positioning hole.

[0013] In some embodiments, the wall thickness of the positioning post is greater than or equal to 10 mm; and / or, the third positioning component further includes a reinforcing plate, which is arranged around the positioning post along its axial direction and is fixed to the mold structure.

[0014] In some embodiments, the wind turbine blade root flange device further includes a heating pipe, which includes a first arc-shaped pipe, a second arc-shaped pipe, and a third arc-shaped pipe spaced apart along the radial direction of the flange structure. The heating pipe also includes two connecting pipes, with the first arc-shaped pipe and the second arc-shaped pipe connected by one connecting pipe and the second arc-shaped pipe and the third arc-shaped pipe connected by another connecting pipe. The end of the first arc-shaped pipe is provided with a liquid inlet, and the end of the third arc-shaped pipe is provided with a liquid outlet.

[0015] In some embodiments, thermally conductive adhesive is provided on the side of the heating tube facing the flange structure.

[0016] In some embodiments, a heating cover is provided on the outer surface of the heating tube.

[0017] In some embodiments, the flange structure further includes a pre-embedded flange nest disposed in the flange hole, the pre-embedded flange nest being fixed to the flange hole by sealant.

[0018] In some embodiments, the wind turbine blade root flange device further includes a compensation plate disposed on the side of the flange structure away from the first positioning component. The compensation plate includes a first sub-plate and a second sub-plate. The second sub-plate is connected to the mold structure. The first sub-plate is provided with a plurality of third half-grooves, and the second sub-plate is provided with a plurality of fourth half-grooves. The third half-grooves and the fourth half-grooves are joined together to form a third through hole. The third through hole corresponds to the flange hole in the second direction.

[0019] This application provides a wind turbine blade root flange device. By connecting a connector to the flange structure and an adjusting member, and by placing the connector in the groove of a limiting member, the adjusting member can be moved to adjust its position within the groove. The adjusting member is limited by a first limiting part along a second direction and by a second limiting part along a third direction. The position of the adjusting member along the second and third directions can be flexibly adjusted, thereby fine-tuning the position of the flange structure and achieving more precise adjustment. This improves the accuracy of the pre-embedded bolt sleeve position at the blade root, thus ensuring stable operation of the wind turbine blade. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a flange device provided in some embodiments of this application; Figure 2 for Figure 1 Enlarged diagram of part A in the diagram; Figure 3 This is a schematic diagram of the structure of the first positioning component provided in some embodiments of this application; Figure 4 An exploded view of a first positioning component provided in some embodiments of this application; Figure 5 This is a partial exploded view of a flange device provided in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of the mold-closing column provided in some embodiments of this application; Figure 7 This is a schematic diagram of the structure of a heating tube provided in some embodiments of this application; Figure 8 This is a partial structural schematic diagram of a flange device provided in some embodiments of this application; Figure 9 for Figure 1 Enlarged schematic diagram of part B in the diagram; Figure 10 for Figure 1 Enlarged schematic diagram of part C in the diagram.

[0022] Explanation of reference numerals in the attached figures: 100. Flange assembly; 10. Mold structure; 11. First mold; 12. Second mold; 13. Mold body; 14. Bracket; 141. Fixing plate; 142. Support plate; 20. Flange structure; 21. Flange hole; 22. First flange; 221. First half-groove; 23. Second flange; 231. Second half-groove; 24. Mold closing hole; 30. First positioning component; 31. Connector; 311. First pin hole; 32. Adjusting component; 321. Slot; 322 323. Second pin hole; 324. First adjusting part; 325. Second adjusting part; 326. First side plate; 327. Second side plate; 33. Limiting member; 331. First limiting part; 3311. First limiting block; 3312. First locking member; 3313. First through hole; 332. Second limiting part; 3321. Moving block; 3322. Second limiting block; 3323. Second locking member; 3324. First moving section; 3325. Second moving section; 3326. Two through holes; 333, groove; 3331, bottom wall; 3332, side wall; 34, locating pin; 40, second locating assembly; 41, mold closing pillar; 411, pillar body; 412, protrusion; 50, third locating assembly; 51, locating pillar; 511, locating hole; 52, fixing block; 521, strip hole; 54, reinforcing plate; 60, heating tube; 61, first arc-shaped tube; 611, liquid inlet; 62, second arc-shaped tube; 63, third arc-shaped tube; 631, liquid outlet. 64. Connecting pipe; 70. Compensating plate; 71. First sub-plate; 711. Third half-groove; 72. Second sub-plate; 721. Fourth half-groove; 73. Third through hole; 80. Limiting plate; 81. First limiting sub-plate; 811. First protrusion; 82. Second limiting sub-plate; 821. Second protrusion; 90. Locking assembly; 91. Fixing part; 92. Rotating part; 921. Locking hole; 93. Abutting part; 94. Fourth locking element; Y, second direction; Z, third direction. Detailed Implementation

[0023] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0024] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0025] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0026] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Please refer to the following: Figures 1-3The first aspect of this application provides a wind turbine blade root flange device 100, which includes a mold structure 10, a flange structure 20, and a positioning structure. The flange structure 20 is provided with a plurality of flange holes 21. The positioning structure includes a plurality of first positioning components 30, and the flange structure 20 is connected to the mold structure 10 through the first positioning components 30. The first positioning component 30 includes a connecting member 31, an adjusting member 32, and a limiting member 33. The connecting member 31 is connected to the flange structure 20, the adjusting member 32 is connected to the connecting member 31, and the limiting member 33 is connected to the mold structure 10. The flange structure 20 includes a first limiting part 331 and a second limiting part 332. The limiting member 33 is further provided with a groove 333 that is recessed along a first direction. At least a portion of the adjusting member 32 is located in the groove 333. The first limiting part 331 is used to limit the position of the adjusting member 32 in the groove 333 along the second direction Y. The second limiting part 332 is used to limit the position of the adjusting member 32 in the groove 333 along the third direction Z. The first direction is the height direction of the flange structure 20, the second direction Y is the axial direction of the flange structure 20, and the first direction, the second direction Y and the third direction Z are perpendicular to each other.

[0028] The mold structure 10 includes a first mold 11 and a second mold 12, which are arranged along a first direction, with the first mold 11 located above the second mold 12. The flange structure 20 includes a first flange 22 and a second flange 23, which are arranged along the first direction, with the first flange 22 located above the second flange 23. The first flange 22 is connected to the first mold 11 via a positioning structure, and similarly, the second flange 23 is connected to the second mold 12 via a positioning structure. That is, the mounting structure of the first flange 22 and the first mold 11 is the same as the mounting structure base plate of the second flange 23 and the second mold 12. For example, the upper end of the first flange 22 can be connected to the first mold 11 via three first positioning components 30, and the lower end of the second flange 23 can be connected to the second mold 12 via three first positioning components 30.

[0029] Multiple flange holes 21 on the flange structure 20 are spaced apart along the circumference of the flange structure 20, and each flange hole 21 corresponds to a multiple pre-embedded bolt sleeve. During blade fabrication, bolts are passed through the pre-embedded bolt sleeves and the flange holes 21 of the flange structure 20. First, the outer skin is laid in the mold, then the inner skin is laid, covering each pre-embedded bolt sleeve. Resin is poured using a vacuum infusion process. After the resin cures, the outer skin, pre-embedded bolt sleeves, and inner skin form the blade root structure, thus completing blade forming. After blade forming, the bolts and flange device 100 are removed, and the pre-embedded bolt sleeves are embedded in the blade root of the formed blade. The removed bolts and flange device 100 can be reused.

[0030] The connector 31 of the first positioning assembly 30 can be connected to the flange structure 20 by means of bolts or clips. Please refer to the following: Figure 3 and Figure 4 A slot 321 can be provided in the adjusting member 32, and the end of the connecting member 31 is inserted into the slot 321 so that the end of the connecting member 31 can be locked in the slot 321. A first pin hole 311 can be provided in the connecting member 31 along the third direction Z, and a second pin hole 322 can be provided in the adjusting member 32 along the third direction Z. A positioning pin 34 is used to pass through the second pin hole 322 and the first pin hole 311 respectively, so that the connecting member 31 and the adjusting member 32 can be locked together.

[0031] The end of the connector 31 used for inserting into the adjuster 32 can be set to be arc-shaped. Correspondingly, the slot 321 of the adjuster 32 can also be set to be arc-shaped to match the end of the connector 31. The arc shape has a guiding effect, so that the connector 31 can be inserted into the slot 321 more smoothly, thereby improving assembly efficiency.

[0032] The limiting member 33 can be connected to the mold structure 10 by bolts or clips. The limiting member 33 has a groove 333 on the side opposite to the adjusting member 32. The first adjusting member 32 is located in the groove 333. There is a gap between the first adjusting member 32 and the periphery of the groove 333, so the position of the first adjusting member 32 in the groove 333 can be moved. The first limiting part 331 and the second limiting part 332 can be a bolt structure or a spring structure, so that when the position of the first adjusting member 32 is determined, the first adjusting member 32 is fixed in the groove 333.

[0033] This embodiment connects the connector 31 to the flange structure 20 and the adjusting member 32. The connector 31 is placed in the groove 333 of the limiting member 33, allowing the adjusting member 32 to move and adjust its position within the groove 333. The first limiting part 331 limits the adjusting member 32 along the second direction Y, and the second limiting part 332 limits it along the third direction Z. This allows for flexible adjustment of the adjusting member 32's position along the second direction Y (axial direction) and the third direction Z (chordal direction), thereby fine-tuning the position of the flange structure 20. This enables more precise adjustment of the flange structure 20's position, effectively compensating for errors during installation, significantly improving the accuracy and consistency of the embedded flange installation, and enhancing the accuracy of the embedded bolt sleeve position at the blade root, ultimately ensuring stable operation of the wind turbine blades.

[0034] like Figure 3As shown, in some embodiments, the first limiting part 331 includes a first limiting block 3311 and a first locking member 3312. The first limiting block 3311 is disposed at one end of the groove 333 along the second direction Y. The first limiting block 3311 is provided with a first through hole 3313 through which the first locking member 3312 passes. The first through hole 3313 passes through the first limiting block 3311 along the second direction Y. The first locking member 3312 is used to abut against the adjusting member 32.

[0035] The first locking member 3312 can be a bolt. By moving the adjusting member 32 along the second direction Y, the position of the adjusting member 32 in the groove 333 is adjusted. Then, the first locking member 3312 is rotated so that the first locking member 3312 abuts against the adjusting member 32. The second limiting part 332 clamps the two sides of the adjusting member 32 along the third direction Z, thereby fixing the position of the first adjusting member 32.

[0036] In this embodiment, the position of the adjusting member 32 along the second direction Y can be adjusted by the first limiting block 3311 and the first locking member 3312, so as to realize the flexible and precise adjustment of the flange structure 20 along the axial direction. The first limiting part 331 has a simple structure, which facilitates the quick and precise adjustment of the position of the adjusting member 32 along the second direction Y.

[0037] In some embodiments, the adjusting member 32 includes a first adjusting portion 323 and a second adjusting portion 324 disposed opposite to each other along the second direction Y, a connecting member 31 disposed between the first adjusting portion 323 and the second adjusting portion 324, a first locking member 3312 abutting against the first adjusting portion 323, and the height of the first adjusting portion 323 along the first direction is greater than the height of the second adjusting portion 324 along the first direction.

[0038] The adjusting member 32 may further include a first side plate 325 and a second side plate 326 disposed opposite to each other along the third direction Z. The two ends of the first side plate 325 are respectively connected to the first adjusting part 323 and the second adjusting part 324, and the two ends of the second side plate 326 are respectively connected to the first adjusting part 323 and the second adjusting part 324. Second pin holes 322 are respectively provided on the first side plate 325 and the second side plate 326. A positioning pin 34 is used to pass through the second pin hole 322 of the first side plate 325, the first pin hole 311 of the connecting member 31, and the second pin hole 322 of the second side plate 326 in sequence to fix the connecting member 31 and the adjusting member 32.

[0039] The end of the first adjusting part 323 protrudes relative to the end of the second adjusting part 324, meaning the height of the first adjusting part 323 is greater than the height of the second adjusting part 324. By making the height of the first adjusting part 323 along the first direction greater than the height of the second adjusting part 324 along the first direction, axial displacement of the flange structure 20 can be prevented due to thermal expansion and contraction of the blade during the pouring, curing, and heating process. Furthermore, when the flange structure 20, along with the connecting piece 31, falls downwards into the slot 321 for fixation, the first adjusting part 323 also provides a guiding function, allowing the connecting piece 31 to be inserted into the slot 321 more smoothly. The end of the first adjusting part 323 can be formed into an arc surface to further enhance the guiding function, making it even easier for the connecting piece 31 to fall into the slot 321. Moreover, the adjusting piece 32 can be quickly installed and removed, shortening installation time and improving installation efficiency. When the adjusting piece 32 is damaged, it can be replaced separately without replacing the entire first positioning assembly 30, reducing maintenance costs.

[0040] Please refer to the following: Figure 3 and Figure 4 In some embodiments, there are two second limiting parts 332, and the two second limiting parts 332 are respectively disposed at both ends of the groove 333 along the third direction Z; the second limiting part 332 includes a moving block 3321, a second limiting block 3322, and a second locking member 3323. The moving block 3321 includes a first moving segment 3324 and a second moving segment 3325 connected to each other. The first moving segment 3324 extends along the first direction, and the second moving segment 3325 extends along the third direction Z. The groove 333 includes a bottom wall 3331 and two side walls 3332. The two side walls 3332 are respectively disposed on both sides of the bottom wall 3331 along the third direction Z. The first moving section 3324 abuts against the adjusting member 32 and the bottom wall 3331 respectively. The second limiting block 3322 is provided with a second through hole 3326 for the second locking member 3323 to pass through. The second through hole 3326 passes through the second limiting part 332 along the third direction Z. The second locking member 3323 is used to abut against the second moving section 3325.

[0041] The movable block 3321 can be L-shaped. The first movable segment 3324 of the two movable blocks 3321 clamps the adjusting member 32 in the middle. There is a certain gap between the first movable segment 3324 and the side wall 3332 of the groove 333, providing room for the first movable segment 3324 to move in the third direction Z. The second movable segment 3325 is located on the side of the side wall 3332 away from the bottom wall 3331, so that the second movable segment 3325 can slide on the side wall 3332 when the movable block 3321 is adjusted.

[0042] The second locking element 3323 can be a bolt. When it is necessary to adjust the position of the adjusting element 32 along the third direction Z, the second locking element 3323 can be loosened, and then the two second limit blocks 3322 can be moved. After the position of the adjusting element 32 is determined, the second locking element 3323 is tightened so that the two second limit blocks 3322 clamp the adjusting element 32.

[0043] Bolt holes can also be provided on the side wall 3332 of the groove 333 and the second moving section 3325 of the second limiting block 3322. By passing bolts through the bolt holes, the second limiting block 3322 and the side wall 3332 can be fixed to the mold structure 10 to increase the stability of the limiting component 33. Moreover, the detachable connection method allows for individual maintenance and replacement, reducing the maintenance cost of the flange device 100.

[0044] In this embodiment, the position of the adjusting member 32 along the third direction Z can be adjusted by the second limiting part 332, so as to realize the flexible and precise adjustment of the flange structure 20 along the chord direction. The second limiting part 332 has a simple structure and is convenient for quick and precise adjustment of the position of the adjusting member 32 along the third direction Z.

[0045] like Figure 1 As shown, in some embodiments, the mold structure 10 includes a mold body 13 and a support 14. The support 14 includes a fixing plate 141 and a plurality of spaced support plates 142. The fixing plate 141 is connected to the mold body 13, and the support plates 142 are connected to the fixing plate 141 and the mold body 13 respectively. The limiting member 33 is connected to the fixing plate 141. The thickness of the fixing plate 141 is greater than or equal to 3cm.

[0046] The mold body 13 includes a first mold 11 and a second mold 12, which are arranged along a first direction, with the first mold 11 located above the second mold 12. Supports 14 can be provided on both the first mold 11 and the second mold 12. Multiple first positioning components 30 arranged at intervals can be provided on each support 14.

[0047] The support plate 142 can be triangular, rectangular, or other shapes. For example, the support plate 142 is triangular, which can ensure the connection area between the support plate 142 and the fixing plate 141, while reducing the weight of the bracket 14 and saving costs.

[0048] The fixing plate 141 can be made of 30mm thick steel plate to enhance its strength and stability, and is welded and fixed to the mold structure 10 through the support plate 142. The first positioning component 30 is connected to the flange structure 20 and the fixing plate 141 by bolts, and then welded. This composite connection method effectively disperses the stress concentration generated during the lifting process and enhances the overall load-bearing capacity.

[0049] Please refer to the following: Figure 1 , Figure 5 and Figure 6 In some embodiments, the flange structure 20 includes a first flange 22 and a second flange 23 distributed along a first direction. The first flange 22 has a first half-groove 221 on the side facing the second flange 23, and the second flange 23 has a second half-groove 231 on the side facing the first flange 22. The first half-groove 221 and the second half-groove 231 are joined together to form a mold closing hole 24. The positioning structure also includes a second positioning component 40. The second positioning component 40 includes two mold closing columns 41 spaced apart along a third direction Z. The mold closing column 41 includes a column body 411 and protrusions 412 provided at both ends of the column body 411 along the first direction. The column body 411 passes through the mold closing hole 24, and the protrusions 412 abut against the first flange 22 and the second flange 23 respectively.

[0050] The first half-groove 221 and the second half-groove 231 can both be semi-circular. When the mold is closed, the first half-groove 221 and the second half-groove 231 are joined together to form a circular mold closing hole 24. The column body 411 is cylindrical, the mold closing column 41 is I-shaped, and the protrusion 412 is radially protruding relative to the column body 411. When the mold is closed, the flange structure 20 is sandwiched between the two protrusions 412.

[0051] A chamfer can also be provided on the side of the protrusion 412 facing the column body 411 to avoid interference between the flange structure 20 and the protrusion 412 during the mold closing process, and to ensure smooth mold closing.

[0052] The mold-closing column 41 of this application embodiment can prevent the flange structure 20 from axially misaligning during the curing stage, and further improve the accuracy of the position of the pre-embedded bolt sleeve of the blade root.

[0053] In some embodiments, the positioning structure further includes a third positioning component 50, which includes a positioning post 51, a fixing block 52, and a third locking member. The positioning post 51 is connected to the mold structure 10, the fixing block 52 is connected to the flange structure 20, the fixing block 52 is provided with a strip hole 521, the positioning post 51 is provided with a positioning hole 511, and the third locking member (not shown) is used to pass through the strip hole 521 and the positioning hole 511.

[0054] A third positioning component 50 can be used to connect the first mold 11 and the first flange 22, and a third positioning component 50 can also be used to connect the second mold 12 and the second flange 23. For example, multiple third positioning components 50 can be provided on the left and right sides of the first flange 22, and two third positioning components 50 can be provided on the left and right sides of the second flange 23, together with the first positioning component 30, to more stably connect the flange structure 20 and the mold structure 10.

[0055] The fixing block 52 can be connected to the flange structure 20 by bolts, clips, or other structures. The positioning pin 51 passes through the mold structure 10 and is fixed to the mold structure 10, specifically by welding, clips, or adhesive. The third locking member passes through the strip hole 521 of the fixing block 52 and the positioning hole 511 on the positioning pin 51, respectively, to fix the flange structure 20 to the mold structure 10.

[0056] Because the strip-shaped hole 521 on the fixing block 52 is a through hole of a certain length, when the position of the flange structure 20 needs to be adjusted, the fixing hole can be moved, and the strip-shaped hole 521 can still be aligned with the positioning hole 511 on the positioning column 51. Therefore, the third positioning component 50 of this embodiment facilitates fine-tuning of the position of the flange structure 20, further improving the accuracy of the position of the pre-embedded bolt sleeve of the blade root. Moreover, the structure is simple, easy to install and disassemble, and can improve installation efficiency.

[0057] In some embodiments, the wall thickness of the positioning post 51 is greater than or equal to 10 mm, which can improve the structural strength and stability of the positioning post 51.

[0058] And / or, the third positioning component 50 also includes a reinforcing plate 54, which is arranged around the axial direction of the positioning post 51 and is fixed to the mold structure 10. The positioning post 51 can be welded to the reinforcing plate 54 first, and then the reinforcing plate 54 can be welded to the mold structure 10 to improve positioning rigidity and stability.

[0059] Please refer to the following: Figure 1 and Figure 7 In some embodiments, the wind turbine blade root flange device 100 further includes a heating pipe 60. The heating pipe 60 includes a first arc-shaped pipe 61, a second arc-shaped pipe 62, and a third arc-shaped pipe 63 spaced apart along the radial direction of the flange structure 20. The heating pipe 60 also includes two connecting pipes 64. The first arc-shaped pipe 61 and the second arc-shaped pipe 62 are connected by one connecting pipe 64, and the second arc-shaped pipe 62 and the third arc-shaped pipe 63 are connected by the other connecting pipe 64. The end of the first arc-shaped pipe 61 is provided with a liquid inlet 611, and the end of the third arc-shaped pipe 63 is provided with a liquid outlet 631.

[0060] Heating tubes 60 can be installed on both the first flange 22 and the second flange 23. The first arc-shaped tube 61, the second arc-shaped tube 62, and the third arc-shaped tube 63 are all arc-shaped, with the inlet 611 and outlet 631 respectively located on both sides of the flange structure 20 along the third direction Z. The bent tubes, through their bend-loop design, fully utilize the space of the flange structure 20, increasing the area of ​​the heating tubes 60. Optimized design of the heating tube layout ensures consistent temperature across the upper and lower heating areas of the flange structure 20, guaranteeing uniform deformation of the flange structure 20 after heating. This ensures that the heating tubes 60 can uniformly transfer heat to the blade root region, resulting in a uniform temperature in the blade root region during resin curing. Uniform temperature ensures complete resin curing in the blade root region, avoiding localized uncured or over-cured areas, thereby improving the performance of the blade root material and solving the problem of uneven heating.

[0061] In some embodiments, thermally conductive adhesive is provided on the side of the heating tube 60 facing the flange structure 20.

[0062] Before installation, a thermally conductive adhesive (such as thermal grease) is evenly applied to the side of the heating element 60 that will contact the flange structure 20 (i.e., the back side). The surface of the heating element 60 is microscopically uneven, containing numerous tiny gaps with the flange structure 20. Air within these gaps is a poor conductor of heat. The thermally conductive adhesive, as a thermal interface material, effectively fills these gaps and expels the air. By filling these gaps, the thermally conductive adhesive establishes a heat conduction path between the heating element 60 and the flange structure 20, reducing the contact thermal resistance between them.

[0063] The heating element 60, coated with thermally conductive adhesive, is tightly attached to the flange structure 20 and securely pressed and fixed to the flange surface using mechanical means such as fixing plates, pressure strips, or bolts. Mechanical fixing provides strong clamping force, forcing the heating element 60 to achieve a larger physical contact area with the flange structure 20 surface. This, combined with the thermally conductive adhesive, ensures efficient heat transfer. Securely locking the heating element 60 in its designed layout position prevents displacement during subsequent hoisting, mold closing, or vibration, ensuring the controllability and consistency of the heating field distribution.

[0064] In some embodiments, a heating cover (not shown) is provided on the outer surface of the heating tube 60.

[0065] After the heating element 60 is installed and secured, a heating cover made of metal (such as stainless steel or aluminum alloy) or high-temperature resistant composite material is placed over it and bolted in place to seal it, protecting the heating element 60 from damage during production and maintenance. The heating cover also serves to even out heat distribution and reflect heat, allowing it to radiate more evenly forward while reducing heat loss to the surrounding environment, thereby improving heating efficiency and temperature uniformity. The heating cover also forms a physical barrier, preventing operators from directly contacting the high-temperature surface of the heating element 60 and avoiding burns.

[0066] Optionally, the heating element 60 may be made of high-quality materials such as stainless steel or copper to ensure that the heating element 60 has good thermal conductivity and high temperature resistance, thereby extending the service life of the heating element 60.

[0067] In some embodiments, the flange structure 20 further includes a pre-embedded flange nest (not shown) disposed in the flange hole 21, the pre-embedded flange nest being fixed to the flange hole 21 by sealant.

[0068] The embedded bolts have internal threads for use with double-ended bolts or connecting bolts to achieve a mechanical connection between the wind turbine blades and the wind turbine hub.

[0069] The independent pre-embedded bolt nests are pre-treated by applying a layer of sealant evenly to their outer cylindrical surface before installation onto the flange structure 20 body. The sealant-coated flange structure nest is then precisely pressed into the corresponding flange hole 21 on the flange structure 20 body. This pressing operation ensures the applied sealant is evenly filled in the gap between the flange hole 21 and the flange structure nest. After curing, the sealant possesses a certain adhesive strength, filling the gap and enhancing the bond between the nest and the flange hole 21, preventing loosening during transportation or hoisting.

[0070] Optionally, the embedded flange is fixed to the flange hole 21 by high-temperature resistant sealant, which can ensure that the sealant will not lose its sealing effect due to high temperature failure during the blade curing and heating process.

[0071] like Figure 8 As shown, in some embodiments, the wind turbine blade root flange device 100 further includes a compensation plate 70 disposed on the side of the flange structure 20 away from the first positioning component 30. The compensation plate 70 includes a first sub-plate 71 and a second sub-plate 72. The second sub-plate 72 is connected to the mold structure 10. The first sub-plate 71 is provided with a plurality of third half-grooves 711, and the second sub-plate 72 is provided with a plurality of fourth half-grooves 721. The third half-grooves 711 and the fourth half-grooves 721 are combined to form a third through hole 73. The third through hole 73 corresponds to the flange hole 21 in the second direction Y.

[0072] A compensating plate 70 is provided between the first flange 22 and the first mold 11, and a compensating plate 70 is also provided between the second flange 23 and the second mold 12. The compensating plate 70 is divided at the center of the flange hole 21 and is made of two independent semi-circular plates spliced ​​together. The compensating plate 70 can increase the depth of the bolt sleeve, which can avoid excessive interference between the pre-embedded bolts and the bolt sleeve structure when the flange device 100 is opened, and ultimately prevent damage to the leaf root bolt sleeve component.

[0073] like Figure 9 As shown, in some embodiments, the positioning structure may further include a limiting plate 80, which includes a first limiting sub-plate 81 and a second limiting sub-plate 82. The first limiting sub-plate 81 is connected to the first flange 22, and the second limiting sub-plate 82 is connected to the second flange 23. The first limiting sub-plate 81 protrudes towards the second flange 23 to form a first protrusion 811, and the second limiting sub-plate 82 protrudes towards the first flange 22 to form a second protrusion 821. The first protrusion 811 abuts against the second flange 23, and the second protrusion 821 abuts against the first flange 22. The first protrusion 811 and the second protrusion 821 are staggered. The first protrusion 811 can limit the movement misalignment of the second flange 23 along the first direction, and the second protrusion 821 can limit the movement misalignment of the first flange 22 along the first direction, thereby improving the stability of the flange structure 20 in the axial direction.

[0074] like Figure 10 As shown, in some embodiments, the positioning structure includes a locking assembly 90, which includes a fixing part 91, a rotating part 92, and an abutting part 93. The fixing part 91 is disposed on the second flange 23, and the rotating part 92 is hinged to the fixing part 91, allowing the rotating part 92 to rotate around the fixing part 91. The abutting part 93 is disposed on the first flange 22, and the rotating part 92 has a locking hole 921. A fourth locking member 94 passes through the locking hole 921 of the rotating part 92, abutting against the abutting part 93 to lock the first flange 22 and the second flange 23. The locking assembly 90 has a simple structure, is easy to install and disassemble, improves assembly and disassembly efficiency, and also enhances the stability of the flange.

[0075] Locking components 90 can be provided on both sides of the flange structure 20 along the third direction Z, so that both sides of the first flange 22 and the second flange 23 can be locked, further improving the stability of the flange structure 20.

[0076] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0077] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A root flange device for wind turbine blades, characterized in that, include: Mold structure; A flange structure having multiple flange holes; A positioning structure includes multiple first positioning components. The flange structure is connected to the mold structure via the first positioning components. Each first positioning component includes a connector, an adjusting component, and a limiting component. The connector is connected to the flange structure, the adjusting component is connected to the connector, and the limiting component is connected to the mold structure. The limiting component includes a first limiting portion and a second limiting portion. The limiting component also has a groove recessed along a first direction. At least a portion of the adjusting component is located in the groove. The first limiting portion is used to limit the position of the adjusting component in the groove along a second direction, and the second limiting portion is used to limit the position of the adjusting component in the groove along a third direction. The first direction is the height direction of the flange structure, the second direction is the axial direction of the flange structure, and the first direction, the second direction, and the third direction are perpendicular to each other.

2. The wind turbine blade root flange device according to claim 1, characterized in that, The first limiting part includes a first limiting block and a first locking member. The first limiting block is disposed at one end of the groove along the second direction. The first limiting block is provided with a first through hole for the first locking member to pass through. The first through hole passes through the first limiting block along the second direction. The first locking member is used to abut against the adjusting member.

3. The wind turbine blade root flange device according to claim 2, characterized in that, The adjusting member includes a first adjusting part and a second adjusting part arranged opposite to each other along the second direction. The connecting member is disposed between the first adjusting part and the second adjusting part. The first locking member abuts against the first adjusting part. The height of the first adjusting part along the first direction is greater than the height of the second adjusting part along the first direction.

4. The wind turbine blade root flange device according to claim 1, characterized in that, The number of the second limiting parts is two, and the two second limiting parts are respectively disposed at both ends of the groove along the third direction; The second limiting part includes a moving block, a second limiting block, and a second locking member. The moving block includes a first moving segment and a second moving segment connected to each other. The first moving segment extends along the first direction, and the second moving segment extends along a third direction. The groove includes a bottom wall and two side walls, the two side walls are respectively disposed on both sides of the bottom wall along the third direction, and the first moving segment abuts against the adjusting member and the bottom wall respectively; The second limiting block is provided with a second through hole through which the second locking member passes. The second through hole passes through the second limiting part in the third direction, and the second locking member is used to abut against the second moving segment.

5. The wind turbine blade root flange device according to claim 1, characterized in that, The adjusting member is provided with a slot, and a first pin hole is provided along the third direction of the connecting member. A second pin hole is provided along the third direction of the adjusting member. The first positioning component also includes a positioning pin, which is used to pass through the second pin hole and the first pin hole respectively to fix the connecting member and the adjusting member.

6. The wind turbine blade root flange device according to claim 1, characterized in that, The mold structure includes a mold body and a support. The support includes a fixed plate and a plurality of spaced-apart support plates. The fixed plate is connected to the mold body. The support plates are connected to the fixed plate and the mold body respectively. The limiting member is connected to the fixed plate. The thickness of the fixed plate is greater than or equal to 3cm.

7. The wind turbine blade root flange device according to claim 1, characterized in that, The flange structure includes a first flange and a second flange distributed along the first direction. The first flange has a first half-groove on the side facing the second flange, and the second flange has a second half-groove on the side facing the first flange. The first half-groove and the second half-groove are joined together to form a mold closing hole. The positioning structure further includes a second positioning component, which includes two mold-closing columns spaced apart along the third direction. Each mold-closing column includes a column body and protrusions at both ends of the column body along the first direction. The column body passes through the mold-closing hole, and the protrusions abut against the first flange and the second flange, respectively.

8. The wind turbine blade root flange device according to claim 7, characterized in that, The protrusion has a chamfer on the side facing the column body.

9. The wind turbine blade root flange device according to claim 1, characterized in that, The positioning structure further includes a third positioning component, which includes a positioning post, a fixing block, and a third locking member. The positioning post is connected to the mold structure, the fixing block is connected to the flange structure, the fixing block is provided with a strip hole, the positioning post is provided with a positioning hole, and the third locking member is used to pass through the strip hole and the positioning hole.

10. The wind turbine blade root flange device according to claim 9, characterized in that, The wall thickness of the positioning post is greater than or equal to 10 mm; And / or, the third positioning component further includes a reinforcing plate, which is arranged around the axial direction of the positioning post and is fixed to the mold structure.

11. The wind turbine blade root flange device according to claim 1, characterized in that, The wind turbine blade root flange device further includes a heating pipe, which includes a first arc-shaped pipe, a second arc-shaped pipe, and a third arc-shaped pipe spaced apart along the radial direction of the flange structure. The heating pipe also includes two connecting pipes. The first arc-shaped pipe and the second arc-shaped pipe are connected by one of the connecting pipes, and the second arc-shaped pipe and the third arc-shaped pipe are connected by the other connecting pipe. The end of the first arc-shaped pipe is provided with a liquid inlet, and the end of the third arc-shaped pipe is provided with a liquid outlet.

12. The wind turbine blade root flange device according to claim 11, characterized in that, Thermally conductive adhesive is applied to the side of the heating tube facing the flange structure.

13. The wind turbine blade root flange device according to claim 11, characterized in that, A heating cover is provided on the outer surface of the heating tube.

14. The wind turbine blade root flange device according to claim 1, characterized in that, The flange structure also includes a pre-embedded flange nest disposed in the flange hole, the pre-embedded flange nest being fixed to the flange hole by sealant.

15. The wind turbine blade root flange device according to claim 1, characterized in that, The wind turbine blade root flange device also includes a compensation plate disposed on the side of the flange structure opposite to the first positioning component. The compensation plate includes a first sub-plate and a second sub-plate, and the second sub-plate is connected to the mold structure. The first sub-plate is provided with multiple third half-grooves, and the second sub-plate is provided with multiple fourth half-grooves. The third half-grooves and the fourth half-grooves are joined together to form a third through hole, and the third through hole corresponds to the flange hole in the second direction.

16. The wind turbine blade root flange device according to claim 1, characterized in that, The flange structure includes a first flange and a second flange distributed along the first direction; The positioning structure further includes a limiting plate, which includes a first limiting sub-plate and a second limiting sub-plate. The first limiting sub-plate is connected to the first flange, and the second limiting sub-plate is connected to the second flange. The first limiting sub-plate protrudes towards the second flange to form a first protrusion, and the second limiting sub-plate protrudes towards the first flange to form a second protrusion. The first protrusion abuts against the second flange, and the second protrusion abuts against the first flange. The first protrusion and the second protrusion are staggered.

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