Wind power blade, wind generating set and manufacturing method of wind power blade
By incorporating pre-embedded bolt sleeves and wedge-shaped block structures into wind turbine blades, and combining this with the design of embedded components, the problem of easy failure in the connection structure of wind turbine blades has been solved, resulting in stronger load-bearing capacity and structural stability.
Patent Information
- Application Number
- CN202511099848.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-06
- Publication Date
- 2025-11-18
AI Technical Summary
In existing technologies, the connection structure between wind turbine blades and wind turbine generators is prone to failure due to shear forces, which can cause embedded parts to be pulled out, affecting connection strength and load-bearing capacity.
The structure employs pre-embedded bolt sleeves and wedge blocks, combined with the design of the inserts. Multiple pre-embedded bolt sleeves and wedge blocks are set along the thickness and axial direction of the wind turbine blade. The skin and bolt sleeves are fixed by the inserts to form an integral structure that can withstand loads perpendicular to and parallel to the blade axial direction.
This improves the structural and connection strength of wind turbine blades, enabling them to effectively withstand wind forces, reduce the risk of pre-embedded bolt sleeves being pulled out of the blades, and enhance the load-bearing capacity of wind turbine blades.
Smart Images
Figure CN120969026A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of wind power generation, in particular to a wind power blade, a wind turbine generator set and a manufacturing method of the wind power blade. BACKGROUND
[0002] In order to connect the blade root of the wind power blade and the hub of the wind turbine, a pre-embedded part is usually arranged at the root of the blade, and the wind power blade is connected with the pitch bearing of the wind turbine through bolts. The pre-embedded part can be in the form of a bolt sleeve and is connected with the bolt. When the pre-embedded part is subjected to a large shear force, the pre-embedded part is easily pulled out of the wind power blade, causing the connection failure of the blade. SUMMARY
[0003] The wind power blade, the wind turbine generator set and the manufacturing method of the wind power blade provided by the embodiments of the present application can improve the load bearing capacity of the pre-embedded bolt sleeve and the connection strength of the wind power blade.
[0004] In a first aspect, the embodiments of the present application provide a wind power blade, comprising: a first skin and a second skin opposite in the thickness direction of the wind power blade; the first skin is provided with a first connecting hole perpendicular to the axial direction of the wind power blade, and the second skin is provided with a second connecting hole perpendicular to the axial direction of the wind power blade; a plurality of pre-embedded bolt sleeves arranged in the chord direction of the wind power blade, the pre-embedded bolt sleeves being arranged between the first skin and the second skin; in the axial direction of the wind power blade, one end of the pre-embedded bolt sleeve is provided with a bolt connecting hole, and the other end is provided with a wedge-shaped block connecting part, and the wedge-shaped block connecting part is provided with a third connecting hole perpendicular to the axial direction of the wind power blade; a plurality of first wedge-shaped blocks arranged between the first skin and the second skin, one end of the first wedge-shaped block in the axial direction of the wind power blade being connected with the wedge-shaped block connecting part; and at least one embedded part, at least a part of the number of embedded parts being inserted into the first connecting hole and the third connecting hole, and at least a part of the number of embedded parts being inserted into the second connecting hole and the third connecting hole.
[0005] According to the embodiments of the first aspect of the present application, the first connecting hole, the second connecting hole and the third connecting hole are coaxially arranged, and the embedded part is simultaneously inserted into the first connecting hole, the second connecting hole and the third connecting hole; in the extension direction of the embedded part, the radii of the minimum covering circles corresponding to the cross-sectional shapes of the two ends of the embedded part are R1, the radius of the minimum covering circle corresponding to the cross-sectional shape of the middle part of the embedded part is R2, and the outer diameter of the pre-embedded bolt sleeve is R3, wherein R3>R1≥R2.
[0006] According to the embodiments of the first aspect of the present application, the embedded part is provided with a plurality of third connecting holes, at least one third connecting hole is coaxially arranged with the first connecting hole, and at least one embedded part is simultaneously inserted into the first connecting hole and the third connecting hole; at least one third connecting hole is coaxially arranged with the second connecting hole, and at least one embedded part is simultaneously inserted into the third connecting hole and the second connecting hole.
[0007] According to the embodiment of the first aspect of the present application, the cross-sectional shape of the embedded part includes a circle, an ellipse or a polygon.
[0008] According to the embodiment of the first aspect of the present application, the wedge-shaped block connecting part is provided with a circular truncated cone blind hole extending along the axial direction of the wind turbine blade, and the hole diameter of the circular truncated cone blind hole gradually increases in the direction away from the bolt connecting hole; the end of the first wedge-shaped block along the axial direction of the wind turbine blade is provided with a circular truncated cone protrusion, and the circular truncated cone protrusion is inserted and connected with the circular truncated cone blind hole.
[0009] According to the embodiment of the first aspect of the present application, the bolt connecting hole includes a threaded section and a non-threaded section connected along the axial direction of the wind turbine blade, and the threaded section is located at the end of the non-threaded section close to the wedge-shaped block connecting part; the inner diameter of the non-threaded section is greater than or equal to the inner diameter of the threaded section.
[0010] According to the embodiment of the first aspect of the present application, the outer side wall of the embedded bolt sleeve is provided with a plurality of annular grooves, and the annular grooves are wound with annular yarns.
[0011] According to the embodiment of the first aspect of the present application, the wind turbine blade further comprises: a plurality of second wedge-shaped blocks, the second wedge-shaped blocks being arranged between the first skin and the second skin; at least one second wedge-shaped block is arranged between adjacent two embedded bolt sleeves along the chordal direction of the wind turbine blade, and at least part of the outer side wall of the second wedge-shaped block is attached to at least part of the outer side wall of the embedded bolt sleeve.
[0012] In the second aspect, the embodiment of the present application provides a wind turbine generator, which comprises the wind turbine blade of the first aspect of the present application.
[0013] In the third aspect, the embodiment of the present application provides a manufacturing method of a wind turbine blade, which comprises: laying a first skin on a mold, the first skin being provided with a first connecting hole perpendicular to the axial direction of the wind turbine blade; providing an embedded bolt sleeve, a first wedge-shaped block and a second wedge-shaped block, the embedded bolt sleeve being provided with a bolt connecting hole at one end and a wedge-shaped block connecting part at the other end along the axial direction of the wind turbine blade, the wedge-shaped block connecting part being provided with a third connecting hole perpendicular to the axial direction of the wind turbine blade; installing the embedded bolt sleeve, the first wedge-shaped block and the second wedge-shaped block on the side of the first skin away from the mold, the end of the first wedge-shaped block along the axial direction of the wind turbine blade being connected with the wedge-shaped block connecting part, and at least one second wedge-shaped block being arranged between adjacent two embedded bolt sleeves along the chordal direction of the wind turbine blade; installing a second skin on the side of the embedded bolt sleeve, the first wedge-shaped block and the second wedge-shaped block away from the first skin, the second skin being provided with a second connecting hole perpendicular to the axial direction of the wind turbine blade; at least part of the number of the third connecting holes is coaxial with the first connecting hole, and at least part of the number of the third connecting holes is coaxial with the second connecting hole; inserting an embedded part so that at least part of the number of the embedded parts are inserted into the first connecting hole and the third connecting hole, and at least part of the number of the embedded parts are inserted into the second connecting hole and the third connecting hole; and obtaining the wind turbine blade by curing through a vacuum infusion process.
[0014] According to the embodiment of the third aspect of the present application, in the steps of providing the embedded bolt sleeve, the first wedge-shaped block and the second wedge-shaped block, the step of winding the yarn on the outer sidewall of the embedded bolt sleeve to form the annular yarn is further included; and the step of inserting the insert into the first connecting hole, the second connecting hole and the third connecting hole is performed before the step of removing the annular yarn at the position corresponding to the third connecting hole by the dry fiber removal method.
[0015] In the wind power blade, the wind turbine generator and the manufacturing method of the wind power blade provided by the embodiment of the present application, the plurality of embedded bolt sleeves of the wind power blade are arranged between the first skin and the second skin, and the plurality of embedded bolt sleeves are arranged along the chord direction of the wind power blade and used to be connected with the wind turbine generator. The first wedge-shaped block is also arranged between the first skin and the second skin, and the first wedge-shaped block is connected with the wedge-shaped block connecting part at one end along the axial direction of the wind power blade to form the structural main body of the wind power blade, and the embedded bolt sleeve can bear the load perpendicular to the axial direction of the wind power blade. The insert is inserted into the first connecting hole of the first skin, the second connecting hole of the second skin and the third connecting hole of the embedded bolt sleeve, so that the embedded bolt sleeve can bear the load parallel to the axial direction of the wind power blade. Therefore, the wind power blade of the embodiment of the present application can bear the force parallel and perpendicular to the axial direction of the wind power blade, and the structural strength of the wind power blade of the embodiment of the present application is improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.
[0017] Figure 1 It is a structural schematic diagram of the wind power blade of the embodiment of the present application.
[0018] Figure 2 It is a sectional view of the wind power blade of the embodiment of the present application along the direction perpendicular to the chord direction.
[0019] Figure 3 It is a size schematic diagram of the insert of the wind power blade of the embodiment of the present application.
[0020] Figure 4 It is another size schematic diagram of the insert of the wind power blade of the embodiment of the present application.
[0021] Figure 5 It is a structural schematic diagram of the embedded bolt sleeve of the wind power blade of the embodiment of the present application.
[0022] Figure 6Another sectional view of the wind power blade of the embodiment of the present application along a section perpendicular to the chordwise direction.
[0023] Figure 7 Another structural schematic view of the embedded bolt sleeve of the wind power blade of the embodiment of the present application.
[0024] Figure 8 A structural schematic view of the first wedge block of the wind power blade of the embodiment of the present application.
[0025] Figure 9 Another structural schematic view of the embedded bolt sleeve of the wind power blade of the embodiment of the present application.
[0026] Figure 10 A sectional view of the wind power blade of the embodiment of the present application along a section perpendicular to the axial direction.
[0027] Figure 11 A structural schematic view of the second wedge block of the wind power blade of the embodiment of the present application.
[0028] Figure 12 A structural schematic view of the wind turbine generator of the embodiment of the present application.
[0029] Figure 13 A flow schematic view of the manufacturing method of the wind power blade of the embodiment of the present application.
[0030] Reference signs:
[0031] 1, first skin; 11, first connecting hole;
[0032] 2, second skin; 21, second connecting hole;
[0033] 3, embedded bolt sleeve; 31, bolt connecting hole; 311, threaded section; 312, non-threaded section; 32, wedge block connecting part; 321, third connecting hole; 322, circular truncated cone blind hole; 33, annular groove; 34, annular yarn;
[0034] 4, first wedge block; 41, circular truncated cone protrusion; 42, constant cross-section section; 43, chamfered section;
[0035] 5, embedded part;
[0036] 6, second wedge block;
[0037] 100, wind power blade;
[0038] D1, axial direction; D2, chordwise direction; D3, thickness direction. DETAILED DESCRIPTION
[0039] Features and exemplary embodiments of the various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.
[0040] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The embodiments will be described in detail below with reference to the accompanying drawings.
[0041] The terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Also, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0042] It should be understood that when describing the structure of a component, when one layer, one region is referred to as being "on" or "above" another layer, another region, it can mean being directly on or above another layer, another region, or containing other layers or regions therebetween. Also, if the component is turned over, the layer, the region will be "under" or "below" the other layer, the other region.
[0043] In addition, the term "and / or" herein is merely a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents that the front and rear associated objects have an "or" relationship.
[0044] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that the determination of B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.
[0045] The applicant finds that, in order to connect the wind power blade and the wind turbine, a drilling connection form is adopted, holes are drilled at the blade root of the wind power blade along the axial direction parallel and perpendicular to the wind power blade, and a transverse nut is embedded, one end of a stud bolt is connected with the transverse nut, and the other end is connected with a variable pitch bearing of the wind turbine. However, drilling holes to remove part of the material of the wind power blade may cause material failure at the blade root of the wind power blade, affecting the load bearing capacity of the wind power blade. In order to improve the connection strength and load bearing capacity, a pre-buried bolt sleeve connection form is adopted, a bolt sleeve is pre-buried in the wind power blade, and is integrally formed with the related wedge block and skin. One end of the stud bolt is connected with the pre-buried bolt sleeve, and the other end is connected with the variable pitch bearing of the wind turbine. However, the pre-buried connection structure is prone to shear failure of the interface between the bolt sleeve and the composite material, so that the bolt sleeve is pulled out of the blade root of the wind power blade.
[0046] In view of the above analysis, the embodiment of the present application provides a wind power blade, a wind turbine generator set and a manufacturing method of the wind power blade. The wind power blade comprises a first skin, a second skin, a pre-buried bolt sleeve, a first wedge block and an embedded part. A plurality of pre-buried bolt sleeves are arranged between the first skin and the second skin, and the plurality of pre-buried bolt sleeves are arranged along the chordal direction of the wind power blade, for connection with the wind turbine. The first wedge block is also arranged between the first skin and the second skin, and one end of the first wedge block along the axial direction of the wind power blade is connected with the wedge block connection part, forming a structural main body of the wind power blade, and at the same time, enabling the pre-buried bolt sleeve to bear the load perpendicular to the axial direction of the wind power blade. The embedded part is inserted into the first connecting hole of the first skin, the second connecting hole of the second skin and the third connecting hole of the pre-buried bolt sleeve, so that the pre-buried bolt sleeve can bear the load parallel to the axial direction of the wind power blade. Therefore, the wind power blade of the embodiment of the present application can bear the force parallel and perpendicular to the axial direction of the wind power blade, and the structural strength of the wind power blade of the embodiment of the present application is improved.
[0047] Figure 1 A structural schematic diagram of the wind power blade of the embodiment of the present application. Figure 2 A sectional view of the wind power blade of the embodiment of the present application along the direction perpendicular to the chordal direction.
[0048] Please refer to Figure 1 and Figure 2The wind power blade provided by the embodiment of the application comprises: a first skin 1 and a second skin 2 opposite along a thickness direction D3 of the wind power blade; the first skin 1 is provided with a first connecting hole 11 perpendicular to an axial direction D1 of the wind power blade, and the second skin 2 is provided with a second connecting hole 21 perpendicular to the axial direction D1 of the wind power blade; a plurality of embedded bolt sleeves 3 arranged along a chord direction D2 of the wind power blade, the embedded bolt sleeve 3 being arranged between the first skin 1 and the second skin 2; along the axial direction D1 of the wind power blade, one end of the embedded bolt sleeve 3 is provided with a bolt connecting hole 31, and the other end is provided with a wedge-shaped block connecting part 32, the wedge-shaped block connecting part 32 being provided with a third connecting hole 321 perpendicular to the axial direction D1 of the wind power blade; a plurality of first wedge-shaped blocks 4 arranged between the first skin 1 and the second skin 2, one end of the first wedge-shaped block 4 along the axial direction D1 of the wind power blade being connected with the wedge-shaped block connecting part 32; at least one embedded part 5, at least a part of the number of embedded parts 5 being inserted into the first connecting hole 11 and the third connecting hole 321, and at least a part of the number of embedded parts 5 being inserted into the second connecting hole 21 and the third connecting hole 321.
[0049] The wind power blade of the embodiment of the application is used in a wind turbine generator set, and the wind power blade can bear wind force and drive a rotor of a generator to rotate, so as to realize the purpose of wind power generation. A length direction of the wind power blade corresponds to an axial direction D1 of the wind power blade, and a width direction of the wind power blade corresponds to a chord direction D2 of the wind power blade. It can be considered that the width direction (the chord direction D2) and the thickness direction D3 of the wind power blade are both perpendicular to the length direction (the axial direction D1).
[0050] The first skin 1 and the second skin 2 are arranged oppositely along the thickness direction D3 of the wind power blade, and correspond to an outer skin and an inner skin of the wind power blade of the embodiment of the application respectively. The first skin 1 and the second skin 2 at least cover a root part of the wind power blade of the embodiment of the application. The first skin 1 and the second skin 2 can also extend from the root of the wind power blade of the embodiment of the application to a tip. There is a space around other components between the first skin 1 and the second skin 2, which is used for protecting the structure between the first skin 1 and the second skin 2, so as to improve the structural strength of the wind power blade of the embodiment of the application. It can be understood that, when the wind power blade of the embodiment of the application is manufactured, pouring and curing are performed between the first skin 1 and the second skin 2, so that the wind power blade of the embodiment of the application can obtain a stable structure.
[0051] The embedded bolt sleeve 3 is arranged between the first skin 1 and the second skin 2, and is provided with a bolt connecting hole 31 at one end along the axial direction D1 of the wind power blade, for connecting the wind power blade of the embodiment to a wind turbine. The wind power blade can be connected by a stud bolt, one end of the stud bolt is threadedly connected to the bolt connecting hole 31 of the embedded bolt sleeve 3, and the other end is connected to a pitch bearing of a pitch system of the wind turbine. When the wind power blade of the embodiment is manufactured, the embedded bolt sleeve 3 is arranged between the first skin 1 and the second skin 2, and then pouring and curing are performed, so that the embedded bolt sleeve 3, the first skin 1 and the second skin 2 form an integral structure, and the wind power blade of the embodiment is obtained. Along the chord direction D2 of the wind power blade, the adjacent two embedded bolt sleeves 3 can be filled with a filling material, or a wedge-shaped block can be arranged.
[0052] The first wedge-shaped block 4 is arranged between the first skin 1 and the second skin 2, and is used to fill part of the space between the first skin 1 and the second skin 2, so as to improve the structural strength of the wind power blade of the embodiment. The embedded bolt sleeve 3 is provided with a wedge-shaped block connecting portion 32 at the other end along the axial direction D1 of the wind power blade, and the first wedge-shaped block 4 is connected to the wedge-shaped block connecting portion 32 at one end along the axial direction D1 of the wind power blade. The first wedge-shaped block 4 and the embedded bolt sleeve 3 after connection form an integral structure extending along the axial direction D1 of the wind power blade. When the wind power blade of the embodiment is subjected to a load perpendicular to the axial direction D1 of the wind power blade, the integral structure formed by the connection of the embedded bolt sleeve 3 and the first wedge-shaped block 4 extending along the axial direction D1 of the wind power blade can improve the load bearing capacity of the wind power blade to the load perpendicular to the axial direction D1 of the wind power blade, and reduce the risk of bending or even breaking of the wind power blade of the embodiment. It can be understood that the load perpendicular to the axial direction D1 of the wind power blade can be a load along the chord direction D2 of the wind power blade, or a load along the thickness direction D3 of the wind power blade, or a load in a direction obliquely intersecting the chord direction D2 and the thickness direction D3 of the wind power blade.
[0053] The first skin 1 is provided with a first connecting hole 11 perpendicular to the axial direction D1 of the wind power blade, the second skin 2 is provided with a second connecting hole 21 perpendicular to the axial direction D1 of the wind power blade, and the wedge-shaped block connecting portion 32 of the embedded bolt sleeve 3 is provided with a third connecting hole 321 perpendicular to the axial direction D1 of the wind power blade. The insert 5 can be inserted into the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321, so as to fix the positions of the first skin 1, the second skin 2 and the embedded bolt sleeve 3 along the axial direction D1 of the wind power blade. When the wind power blade of the embodiment is subjected to a load along the axial direction D1 of the wind power blade, the insert 5 can improve the load bearing capacity of the wind power blade of the embodiment to the load along the axial direction D1 of the wind power blade, and reduce the risk that the embedded bolt sleeve 3 is pulled out from between the first skin 1 and the second skin 2 due to the load along the axial direction D1 of the wind power blade.
[0054] It should be noted that at least part of the number of inserts 5 is inserted into the first connecting hole 11 and the third connecting hole 321, and at least part of the number of inserts 5 is inserted into the second connecting hole 21 and the third connecting hole 321. When the inserts 5 inserted into the first connecting hole 11 and the third connecting hole 321 and the inserts 5 inserted into the second connecting hole 21 and the third connecting hole 321 are different inserts 5, the number of inserts 5 is multiple, a part of the inserts 5 is inserted into the first connecting hole 11 and the third connecting hole 321, and another part of the inserts 5 is inserted into the second connecting hole 21 and the third connecting hole 321. The number of inserts 5 and the number of third connecting holes 321 are more than the number of first connecting holes 11 and the number of second connecting holes 21. At this time, the first connecting hole 11 and the second connecting hole 21 are not coaxial. When the inserts 5 inserted into the first connecting hole 11 and the third connecting hole 321 and the inserts 5 inserted into the second connecting hole 21 and the third connecting hole 321 are the same inserts 5, the number of inserts 5 is at least one, and the inserts 5 are inserted into the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 at the same time. The number of inserts 5 and the number of third connecting holes 321 are equal to the number of first connecting holes 11 and the number of second connecting holes 21. At this time, the first connecting hole 11 and the second connecting hole 21 are coaxial. It can be understood that the third connecting hole can be a blind hole or a through hole.
[0055] A single insert 5 can be inserted into the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 at the same time to fix the first skin 1, the second skin 2 and the embedded bolt sleeve 3 at the same time. One insert 5 can be inserted into the first connecting hole 11 and the third connecting hole 321 at the same time to fix the first skin 1 and the embedded bolt sleeve 3, and another insert 5 can be inserted into the second connecting hole 21 and the third connecting hole 321 at the same time to fix the second skin 2 and the embedded bolt sleeve 3. The first skin 1 and the second skin 2 are connected with the embedded bolt sleeve respectively, so as to fix the first skin 1, the second skin 2 and the embedded bolt sleeve 3 together respectively.
[0056] In the embodiment of the application, the embedded bolt sleeve 3 and the first wedge block 4 connected along the axial direction D1 of the wind power blade can improve the load bearing capacity of the wind power blade of the embodiment of the application to the load along the axial direction D1 of the wind power blade. The insert 5 can improve the load bearing capacity of the wind power blade of the embodiment of the application to the load along the axial direction D1 of the wind power blade, so that the wind power blade of the embodiment of the application has good structural strength and connection strength, and has stronger load bearing capacity.
[0057] Figure 3 It is a size schematic view of the insert of the wind power blade of the embodiment of the application. Figure 4 It is another size schematic view of the insert of the wind power blade of the embodiment of the application. Figure 5A structure diagram of a pre-buried bolt sleeve of a wind turbine blade according to an embodiment of the present application.
[0058] Further, please refer to Figures 3 to 5 , and in combination with Figure 2 , the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 are coaxially arranged, and the embedded part 5 is simultaneously inserted into the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321; along the extension direction of the embedded part 5, the radius of the minimum covering circle corresponding to the cross-sectional shape of the two ends of the embedded part 5 is R1, the radius of the minimum covering circle corresponding to the cross-sectional shape of the middle part of the embedded part 5 is R2, and the outer diameter of the pre-buried bolt sleeve 3 is R3, wherein R3>R1≥R2.
[0059] The first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 are coaxially arranged to form a through hole penetrating through the wind turbine blade, so that the embedded part 5 can be simultaneously inserted into the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 to simultaneously fix the first skin 1, the second skin 2 and the pre-buried bolt sleeve 3. At this time, the embedded part 5 can be regarded as a rod. The rod-shaped embedded part 5 can have the same thickness at different positions, that is, the radius R1 of the minimum covering circle corresponding to the cross-sectional shape of the two ends of the embedded part 5 is equal to the radius R2 of the minimum covering circle corresponding to the cross-sectional shape of the middle part of the embedded part 5, so that the embedded part 5 can be more easily inserted into the through hole formed by the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321. The rod-shaped embedded part 5 can also have a thick end and a thin middle, that is, the radius R1 of the minimum covering circle corresponding to the cross-sectional shape of the two ends of the embedded part 5 is greater than the radius R2 of the minimum covering circle corresponding to the cross-sectional shape of the middle part of the embedded part 5, so that the embedded part 5 is more difficult to fall off from the through hole formed by the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321.
[0060] In addition, the outer diameter R3 of the pre-buried bolt sleeve 3 is greater than the radius R1 of the minimum covering circle corresponding to the cross-sectional shape of the two ends of the embedded part 5, that is, the outer diameter of the pre-buried bolt sleeve 3 is greater than the maximum outer diameter of the embedded part 5. By reducing the size of the outer diameter of the embedded part 5, the hole diameter of the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 can be correspondingly reduced, thereby reducing the material of the removed first skin 1, the second skin 2 and the pre-buried bolt sleeve 3, and thereby reducing the influence on the structural strength of the wind turbine blade according to the embodiment of the present application.
[0061] It should be noted that the minimum covering circle corresponding to the cross-sectional shape of the insert 5 at a certain position refers to that the cross section of the insert 5 perpendicular to the extension direction of the insert 5 corresponds to a closed planar geometric figure, the minimum covering circle is the circle with the smallest radius among the circles that can cover the closed planar geometric figure, and when the shape of the closed planar geometric figure is determined, the minimum covering circle corresponding to the closed planar geometric figure is determined. In the embodiments of the present application, the cross-sectional shape of the insert 5 is not limited, and the cross-sectional shape can be a closed planar geometric figure connected by a plurality of broken lines and / or at least one curve. It is difficult to directly limit the thickness of the insert 5 at a certain position, but the thickness of the insert 5 at a certain position can be represented by the radius of the minimum covering circle corresponding to the cross-sectional shape.
[0062] Figure 6 Another sectional view of the wind turbine blade according to the embodiments of the present application along a section perpendicular to the chord direction.
[0063] Further, please refer to Figure 6 The insert 5 is provided in plurality, and the third connecting hole 321 is provided in plurality. At least one third connecting hole 321 is coaxially arranged with the first connecting hole 11, and at least one insert 5 is simultaneously arranged in the first connecting hole 11 and the third connecting hole 321. At least one third connecting hole 321 is coaxially arranged with the second connecting hole 21, and at least one insert 5 is simultaneously arranged in the third connecting hole 321 and the second connecting hole 21.
[0064] The first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 are not coaxially arranged. Among the plurality of third connecting holes 321, at least one third connecting hole 321 is coaxially arranged with the first connecting hole 11, and the third connecting hole 321 and the first connecting hole 11 form a blind hole. At least one insert 5 is simultaneously arranged in the first connecting hole 11 and the third connecting hole 321, i.e. inserted into the blind hole, to connect the first skin 1 and the embedded bolt sleeve 3 together. Among the plurality of third connecting holes 321, at least one third connecting hole 321 is coaxially arranged with the second connecting hole 21, and the third connecting hole 321 and the second connecting hole 21 form a blind hole. At least one insert 5 is simultaneously arranged in the second connecting hole 21 and the third connecting hole 321, i.e. inserted into the blind hole, to connect the second skin 2 and the embedded bolt sleeve 3 together. Therefore, the first skin 1 and the second skin 2 can be respectively connected to the embedded bolt sleeve 3.
[0065] Similarly, the rod-shaped inserts 5 can have the same thickness, which can make the inserts 5 more easily inserted into the blind hole formed by the first connecting hole 11 and the third connecting hole 321, and the blind hole formed by the second connecting hole 21 and the third connecting hole 321. The rod-shaped inserts 5 can also be in the form of a stepped rod, which appropriately reduces the hole diameter of the third connecting hole 321, so that the inserts 5 are more difficult to fall out of the blind hole formed by the first connecting hole 11 and the third connecting hole 321, and the blind hole formed by the second connecting hole 21 and the third connecting hole 321. In addition, the outer diameter of the embedded bolt sleeve 3 is greater than the maximum outer diameter of the insert 5, and by reducing the size of the outer diameter of the insert 5, the hole diameters of the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 can be correspondingly reduced, thereby reducing the material of the removed first skin 1, the second skin 2 and the embedded bolt sleeve 3, and thereby reducing the impact on the structural strength of the wind turbine blade of the embodiments of the present application.
[0066] For ease of illustration, the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 are coaxially arranged in the subsequent embodiments of the present application.
[0067] Further, the cross-sectional shape of the insert 5 includes a circle, an ellipse or a polygon, and the cross-sectional shape of the insert 5 adopts a relatively regular shape, which can reduce the processing difficulty of the insert 5, and correspondingly, the processing difficulty of the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 can also be reduced. Exemplarily, the insert 5 can be made of glass fiber composite material, carbon fiber composite material, thermoplastic material, wood fiber material or metal material.
[0068] Figure 7 Another structural schematic view of the embedded bolt sleeve of the wind turbine blade of the embodiments of the present application. Figure 8 A structural schematic view of the first wedge block of the wind turbine blade of the embodiments of the present application.
[0069] Further, please refer to Figure 7 and Figure 8 The wedge block connecting portion 32 is provided with a circular truncated cone blind hole 322 extending along the axial direction D1 of the wind turbine blade, and the hole diameter of the circular truncated cone blind hole 322 gradually increases in the direction away from the bolt connecting hole 31; one end of the first wedge block 4 along the axial direction D1 of the wind turbine blade is provided with a circular truncated cone protrusion 41, and the circular truncated cone protrusion 41 is inserted and connected with the circular truncated cone blind hole 322.
[0070] The end of the wedge-shaped connecting part 32 is provided with a circular truncated cone blind hole 322, and the end of the first wedge-shaped block 4 is provided with a circular truncated cone protrusion 41 which can be inserted into the circular truncated cone blind hole 322 to connect the embedded bolt sleeve 3 and the first wedge-shaped block 4. In the form of a circular truncated cone, in addition to facilitating the insertion of the embedded bolt sleeve 3 and the first wedge-shaped block 4, it can also play a role in centering, so that the axis of the embedded bolt sleeve 3 and the axis of the first wedge-shaped block 4 are collinear, thereby improving the structural stability of the wind power blade of the embodiment of the application. When manufacturing the wind power blade of the embodiment of the application, the risk of wrinkles in the glass steel of the second skin 2 can be reduced.
[0071] It can be understood that along the axial direction D1 of the wind power blade, the thickness of the wind power blade first remains substantially unchanged and then gradually decreases from the root to the tip, so the first wedge-shaped block 4 can include a constant cross-section section 42 and a chamfered section 43, and the circular truncated cone protrusion 41 is located at one end of the constant cross-section section 42 away from the chamfered section 43. The first wedge-shaped block 4 can be made of foam material to reduce the weight of the wind power blade of the embodiment of the application.
[0072] Further, continuing to refer to Figure 7 and Figure 8 The bolt connecting hole 31 includes a threaded section 311 and a non-threaded section 312 connected along the axial direction D1 of the wind power blade, the threaded section 311 is located at one end of the non-threaded section 312 close to the wedge-shaped connecting part 32; the inner diameter of the non-threaded section 312 is greater than or equal to the inner diameter of the threaded section 311.
[0073] When the stud is connected with the embedded bolt sleeve 3, the end of the stud is threadedly connected with the threaded section 311 of the bolt connecting hole 31, so that the stud can be connected with the embedded bolt sleeve 3 along the axial direction D1 of the wind power blade to bear the load along the axial direction D1 of the wind power blade. At the same time, the non-threaded section 312 can be sleeved on the outer wall of the stud, so that the sleeving of the non-threaded section 312 and the stud can improve the load bearing capacity perpendicular to the axial direction D1 of the wind power blade. Thus, the wind power blade of the embodiment of the application can have good load bearing capacity, and the wind turbine using the embodiment of the application can also have good load bearing capacity. Exemplarily, the embedded bolt sleeve 3 can be made of metal material.
[0074] In the embodiment of the application, the threaded section 311 and the non-threaded section 312 can be an integral structure, or the threaded section 311 and the non-threaded section 312 can be two components connected together, exemplarily, the threaded section 311 and the non-threaded section 312 can be sleeved together. The inner diameter of the non-threaded section 312 is greater than or equal to the inner diameter of the threaded section 311, so that the stud used to connect the wind power blade of the embodiment of the application can more easily enter the bolt connecting hole 31.
[0075] Figure 9Another structure diagram of the embedded bolt sleeve of the wind turbine blade in the embodiment of the present application.
[0076] Further, referring to Figure 9 , the outer side wall of the embedded bolt sleeve 3 is provided with a plurality of annular grooves 33, and the annular grooves 33 are wound with annular yarns 34. When pouring and curing the wind turbine blade in the embodiment of the present application, the annular grooves 33 can enable the embedded bolt sleeve 3 to be embeddedly connected with the surrounding material, thereby improving the load bearing capacity of the embedded bolt sleeve 3 to the load along the axial direction D1 of the wind turbine blade. The annular yarns 34 can improve the connection strength of the embedded bolt sleeve 3 with the surrounding material, further improving the load bearing capacity of the embedded bolt sleeve 3 to the load along the axial direction D1 of the wind turbine blade. It can be understood that the annular yarns 34 should not cover and shield the third connecting hole 321. When manufacturing the wind turbine blade in the embodiment of the present application, the annular yarns 34 can be wound on the outer wall surface of the embedded bolt sleeve 3 first, and then a small amount of annular yarns 34 are removed by dry fiber removal method to expose the third connecting hole 321.
[0077] Figure 10 A sectional view of the wind turbine blade in the embodiment of the present application along a section perpendicular to the axial direction. Figure 11 A structure diagram of the second wedge block of the wind turbine blade in the embodiment of the present application.
[0078] Further, referring to Figure 10 and Figure 11 , the wind turbine blade further comprises: a plurality of second wedge blocks 6, the second wedge blocks 6 being arranged between the first skin 1 and the second skin 2; along the chordal direction D2 of the wind turbine blade, at least one second wedge block 6 is arranged between two adjacent embedded bolt sleeves 3, and at least a part of the outer side wall of the second wedge block 6 is attached to at least a part of the outer side wall of the embedded bolt sleeve 3.
[0079] The second wedge block 6 is disposed between the first skin 1 and the second skin 2 to fill part of the space between the first skin 1 and the second skin 2, thereby improving the structural strength of the wind turbine blade in this embodiment. Along the chordal direction D2 of the wind turbine blade, at least one second wedge block 6 is provided between two adjacent pre-embedded bolt sleeves 3. Considering that the first wedge block 4 and the pre-embedded bolt sleeve 3 can be inserted into a whole along the axis of the wind turbine blade, the space between the two pre-embedded bolt sleeves 3 and the two first wedge blocks 4 can be filled by the second wedge block 6. That is, a portion of the second wedge block 6 is located between the two pre-embedded bolt sleeves 3, and a portion is located between the two first wedge blocks 4. At least a portion of the outer wall of the second wedge block 6 is in contact with at least a portion of the outer wall of the pre-embedded bolt sleeve 3 to improve the connection strength between the pre-embedded bolt sleeve 3 and the second wedge block 6. Exemplarily, the cross-sectional shape of the outer wall of the pre-embedded bolt sleeve 3 can be cylindrical, and the cross-sectional shape of the outer wall of the second wedge block 6 can be an "I" shape with concave arc sides, thereby improving the structural strength of the wind turbine blade in this embodiment.
[0080] Figure 12 This is a schematic diagram of a wind turbine generator set according to an embodiment of this application.
[0081] Please see Figure 12 This application also provides a wind turbine generator set, including the wind turbine blade 100 of the aforementioned embodiments of this application. The wind turbine generator set also includes a wind turbine generator, and the pitch system of the wind turbine generator is connected to the wind turbine blade 100 of the aforementioned embodiments of this application.
[0082] Figure 13 This is a schematic flowchart illustrating a method for manufacturing wind turbine blades according to an embodiment of this application.
[0083] Please see Figure 13 This application also provides a method for manufacturing wind turbine blades, which can be used to manufacture the wind turbine blades described in the foregoing embodiments of this application.
[0084] The method for manufacturing wind turbine blades according to embodiments of this application includes:
[0085] Continue reading Figure 13 Step S1: Make the first skin 1.
[0086] The material of the first skin 1 is laid on the mold of the wind turbine blade to form the first skin 1. The first skin 1 is provided with a first connecting hole 11 perpendicular to the axial direction D1 of the wind turbine blade. The first connecting hole 11 can be pre-made on the material of the first skin 1, or the first connecting hole 11 can be made after the first skin 1 is formed.
[0087] Continue reading Figure 13 Step S2: Provide the pre-embedded bolt sleeve 3, the first wedge block 4, and the second wedge block 6.
[0088] The pre-bolt sleeve 3 is provided with a bolt connecting hole 31 at one end along the axial direction D1 of the wind power blade, which is used for connecting the wind power blade with the wind power generator, and is provided with a wedge connecting part 32 at the other end. The wedge connecting part 32 of the pre-bolt sleeve 3 is provided with a third connecting hole 321 perpendicular to the axial direction D1 of the wind power blade. The first wedge 4 and the second skin 2 are used to fill part of the space between the first skin 1 and the second skin 2, so as to improve the structural strength of the wind power blade of the embodiment of the application.
[0089] With reference to the above Figure 13 , step S3, installing the pre-bolt sleeve 3, the first wedge 4 and the second wedge 6.
[0090] The pre-bolt sleeve 3, the first wedge 4 and the second wedge 6 are installed on the side of the first skin 1 away from the mold. In this process, the first wedge 4 is connected to the wedge connecting part 32 at one end along the axial direction D1 of the wind power blade to form an intermediate body, and the intermediate body is connected to the second wedge 6 alternately along the chordal direction D2 of the wind power blade, that is, along the chordal direction D2 of the wind power blade, at least one second wedge 6 is arranged between two adjacent pre-bolt sleeves 3, and at least one second wedge 6 is arranged between two adjacent first wedges 4. Therefore, the wind power blade obtained by the manufacturing method of the wind power blade of the embodiment of the application can improve the load bearing capacity perpendicular to the axial direction D1 of the wind power blade. At least part of the outer side wall of the second wedge 6 is in contact with at least part of the outer side wall of the pre-bolt sleeve 3, so as to improve the connecting strength between the pre-bolt sleeve 3 and the second wedge 6.
[0091] With reference to the above Figure 13 , step S4, installing the second skin 2.
[0092] The material of the second skin 2 is installed on the side of the pre-bolt sleeve 3, the first wedge 4 and the second wedge 6, which are away from the first skin 1, to form the second skin 2. The second skin 2 is provided with a second connecting hole 21 perpendicular to the axial direction D1 of the wind turbine blade. The second connecting hole 21 can be preformed on the material of the second skin 2, or the second connecting hole 21 can be formed after the second skin 2 is formed. According to the positions of the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321, it can be determined whether the positions of the first skin 1, the second skin 2 and the pre-bolt sleeve 3 need to be adjusted, so that at least a part of the number of the third connecting holes 321 of the pre-bolt sleeve 3 are coaxial with the first connecting holes 11 of the first skin 1, and at least a part of the number of the third connecting holes 321 of the pre-bolt sleeve 3 are coaxial with the second connecting holes 21 of the second skin 2, to facilitate the subsequent installation of the insert 5. It can be understood that the third connecting holes 321 can have a plurality of numbers, of which a part of the number of the third connecting holes 321 are coaxial with the first connecting holes 11, and another part of the number of the third connecting holes 321 are coaxial with the second connecting holes 21; or the third connecting holes 321 can be provided with at least one, and the third connecting holes 321, the first connecting holes 11 and the second connecting holes 21 are coaxial; it can be understood that the third connecting holes can be blind holes or through holes.
[0093] Continuing to refer to Figure 13 , step S5, inserting the insert 5.
[0094] The insert 5 is installed so that at least a part of the number of the inserts 5 are inserted into the first connecting holes 11 and the third connecting holes 321, and at least a part of the number of the inserts 5 are inserted into the second connecting holes 21 and the third connecting holes 321. It can be understood that after the insert 5 is installed, the relative positions of the first skin 1, the second skin 2 and the pre-bolt sleeve 3 along the axial direction D1 of the wind turbine blade can be fixed. The wind turbine blade obtained by the method for manufacturing the wind turbine blade of the embodiment of the present application can improve the load bearing capacity along the axial direction D1 of the wind turbine blade. It can be understood that the insert 5 can have a plurality of numbers, of which a part of the number of the inserts 5 are inserted into the third connecting holes 321 and the first connecting holes 11 at the same time, and another part of the number of the inserts 5 are inserted into the third connecting holes 321 and the second connecting holes 21 at the same time; or the insert 5 can be provided with at least one, and the insert 5 is inserted into the third connecting holes 321, the first connecting holes 11 and the second connecting holes 21 at the same time.
[0095] Continuing to refer to Figure 13 , step S6, pouring and curing.
[0096] The first skin 1, the embedded bolt sleeve 3, the first wedge-shaped block 4, the second wedge-shaped block 6 and the second skin 2 are filled and cured by a vacuum infusion process to obtain the wind power blade. The wind power blade obtained by the manufacturing method of the wind power blade of the embodiment of the present application can improve the load bearing capacity of the parallel and vertical wind power blade axial D1, and improve the structural strength of the wind power blade.
[0097] Further, the step S2 comprises: winding yarns on the outer side wall of the embedded bolt sleeve 3 to form the hoop yarns 34. The outer side wall of the embedded bolt sleeve 3 can be provided with a plurality of annular grooves 33, and at least a part of the hoop yarns 34 is wound at the annular grooves 33. Before winding the hoop yarns 34, the surface of the embedded bolt sleeve 3 is subjected to sand blasting treatment, coupling agent treatment, laser treatment or plasma treatment, and then the hoop yarns 34 are wound on the outer side wall of the embedded bolt sleeve 3. The hoop yarns 34 can improve the connection strength of the embedded bolt sleeve 3 and the surrounding material, and further improve the load bearing capacity of the embedded bolt sleeve 3 along the axial D1 of the wind power blade.
[0098] Further, after the step S2 and before the step S5, the manufacturing method of the wind power blade of the embodiment of the present application further comprises: removing the hoop yarns 34 corresponding to the position of the third connecting hole 321 by a dry fiber removal method, so that the third connecting hole 321 is exposed relative to the hoop yarns 34, to facilitate the insertion of the insert 5 into the first connecting hole 11, the second connecting hole 21 and the third connecting hole 321 in the step S6. It can be understood that the specific step sequence of removing part of the hoop yarns 34 is not limited, which can be after the step S2 and before the step S3, or after the step S3 and before the step S4, or after the step S4 and before the step S5.
[0099] In summary, the embodiment of the present application provides a wind power blade, a wind turbine generator and a manufacturing method of the wind power blade, wherein a plurality of embedded bolt sleeves of the wind power blade are arranged between the first skin and the second skin, and the plurality of embedded bolt sleeves are arranged along the chord direction of the wind power blade for connection with the wind turbine generator. The first wedge-shaped block is also arranged between the first skin and the second skin, and the first wedge-shaped block is connected with the wedge-shaped block connecting portion at one end along the axial direction of the wind power blade to form a structural body of the wind power blade, and at the same time, the embedded bolt sleeve can bear the load perpendicular to the axial direction of the wind power blade. The insert is inserted into the first connecting hole of the first skin, the second connecting hole of the second skin and the third connecting hole of the embedded bolt sleeve, so that the embedded bolt sleeve can bear the load parallel to the axial direction of the wind power blade. Therefore, the wind power blade of the embodiment of the present application can bear the parallel and vertical axial forces of the wind power blade, and improve the structural strength of the wind power blade of the embodiment of the present application.
[0100] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A wind turbine blade, characterized in that, include: A first skin and a second skin are opposite each other along the thickness direction of the wind turbine blade; the first skin is provided with a first connecting hole perpendicular to the axial direction of the wind turbine blade, and the second skin is provided with a second connecting hole perpendicular to the axial direction of the wind turbine blade. Multiple pre-embedded bolt sleeves are arranged along the chord of the wind turbine blade, and the pre-embedded bolt sleeves are disposed between the first skin and the second skin; along the axial direction of the wind turbine blade, one end of the pre-embedded bolt sleeve is provided with a bolt connection hole, and the other end is provided with a wedge-shaped block connection part, and the wedge-shaped block connection part is provided with a third connection hole perpendicular to the axial direction of the wind turbine blade. Multiple first wedge blocks are disposed between the first skin and the second skin, and one end of the first wedge block along the axial direction of the wind turbine blade is connected to the wedge block connecting part; At least one insert, at least a portion of the inserts being inserted into the first connection hole and the third connection hole, and at least a portion of the inserts being inserted into the second connection hole and the third connection hole.
2. The wind turbine blade according to claim 1, characterized in that, The first connecting hole, the second connecting hole, and the third connecting hole are coaxially arranged, and the insert is simultaneously inserted into the first connecting hole, the second connecting hole, and the third connecting hole; Along the extension direction of the insert, the radius of the minimum covering circle corresponding to the cross-sectional shape at both ends of the insert is R1, the radius of the minimum covering circle corresponding to the cross-sectional shape at the middle of the insert is R2, and the outer diameter of the pre-embedded bolt sleeve is R3, where R3>R1≥R2.
3. The wind turbine blade according to claim 1, characterized in that, The embedding is provided in multiple ways, and the third connecting hole is provided in multiple ways. At least one of the third connecting holes is coaxially arranged with the first connecting hole, and at least one of the embeddings is simultaneously inserted into the first connecting hole and the third connecting hole; at least one of the third connecting holes is coaxially arranged with the second connecting hole, and at least one of the embeddings is simultaneously inserted into the third connecting hole and the second connecting hole.
4. The wind turbine blade according to claim 2 or 3, characterized in that, The cross-sectional shape of the insert includes a circle, an ellipse, or a polygon.
5. The wind turbine blade according to claim 1, characterized in that, The wedge-shaped block connecting part is provided with a frustum blind hole extending along the axial direction of the wind turbine blade, and the diameter of the frustum blind hole gradually increases in the direction away from the bolt connection hole. The first wedge block has a frustum protrusion at one end along the axial direction of the wind turbine blade, and the frustum protrusion is connected to the frustum blind hole.
6. The wind turbine blade according to claim 1, characterized in that, The bolt connection hole includes a threaded section and a non-threaded section connected along the axial direction of the wind turbine blade, with the threaded section located at one end of the non-threaded section near the wedge block connection portion; The inner diameter of the non-threaded section is greater than or equal to the inner diameter of the threaded section.
7. The wind turbine blade according to claim 1, characterized in that, The wind turbine blade further includes: a plurality of second wedge blocks, the second wedge blocks being disposed between the first skin and the second skin; along the chord direction of the wind turbine blade, at least one second wedge block is provided between two adjacent pre-embedded bolt sleeves, and at least a portion of the outer wall of the second wedge block is in contact with at least a portion of the outer wall of the pre-embedded bolt sleeve.
8. A wind turbine generator set, characterized in that, Includes the wind turbine blades described in any one of claims 1 to 7.
9. A method for manufacturing a wind turbine blade, characterized in that, include: The first skin is laid on the mold to make the first skin, which has a first connecting hole perpendicular to the axis of the wind turbine blade; The system provides a pre-embedded bolt sleeve, a first wedge block, and a second wedge block. Along the axial direction of the wind turbine blade, one end of the pre-embedded bolt sleeve is provided with a bolt connection hole, and the other end is provided with a wedge block connection part. The wedge block connection part is provided with a third connection hole perpendicular to the axial direction of the wind turbine blade. The pre-embedded bolt sleeve, the first wedge block, and the second wedge block are installed on the side of the first skin away from the mold. One end of the first wedge block along the axial direction of the wind turbine blade is connected to the wedge block connection part. At least one second wedge block is provided between two adjacent pre-embedded bolt sleeves along the chord direction of the wind turbine blade. A second skin is installed on the side of the pre-embedded bolt sleeve, the first wedge block, and the second wedge block that is away from the first skin. The second skin is provided with a second connecting hole perpendicular to the axial direction of the wind turbine blade. At least a portion of the third connecting holes are coaxial with the first connecting hole, and at least a portion of the third connecting holes are coaxial with the second connecting hole. Insert an insert such that at least a portion of the insert is inserted into the first connection hole and the third connection hole, and at least a portion of the insert is inserted into the second connection hole and the third connection hole; Wind turbine blades are obtained by vacuum infusion curing.
10. The method for manufacturing wind turbine blades according to claim 9, characterized in that, The step of providing the pre-embedded bolt sleeve, the first wedge block, and the second wedge block includes: Yarn is wound around the outer wall of the pre-embedded bolt sleeve to form a circumferential yarn; Prior to the step of inserting the insert into the first connecting hole, the second connecting hole, and the third connecting hole, the method further includes: The circumferential yarn corresponding to the third connecting hole is removed by a dry fiber removal method.