Blade embedded screw sleeve embedding construction tool and construction method thereof

Abstract

The embodiment of the invention provides a blade pre-embedded thread sleeve pre-embedded construction tool and a construction method of the blade pre-embedded thread sleeve pre-embedded construction tool. The blade embedded thread sleeve embedding construction tool comprises a mold, a blade embedded thread sleeve and an embedded thread sleeve. The mold is provided with a mold cavity. The multiple thread sleeves are arranged in the mold cavity and used for being arranged along the wall face of the blade; the mold cavity is filled with the composite filler, and the composite filler comprises matrix resin and reinforcing fibers. According to the blade pre-embedded threaded sleeve pre-embedded construction tool and the construction method thereof, the construction difficulty is small, and the period is short.

Description

Technical Field

[0001] This application relates to the field of wind power technology, and in particular to a blade pre-embedded screw sleeve pre-embedded construction tool and its construction method. Background Technology

[0002] Wind turbine blades are one of the key components of wind turbine generators. Their main function is to convert wind energy into mechanical energy to drive the generator. As the length of wind turbine blades gradually increases, the demand for blade tip testing is also increasing. However, the tested blade tips are all sections cut from full-size samples, lacking a device for fixing them.

[0003] In related technologies, threaded sleeves are used to surround the outer side of the blade, with the shape of multiple threaded sleeves matching the shape of the blade's outer wall to keep the blade in a vertical position. Then, lay-up and resin infusion are performed.

[0004] However, the construction is quite difficult and takes a long time. Summary of the Invention

[0005] This application provides a blade pre-embedded screw sleeve pre-embedded construction tool and construction method, which has low construction difficulty and short cycle.

[0006] In a first aspect, embodiments of this application provide a blade pre-embedded threaded sleeve pre-embedding construction tooling, comprising:

[0007] The mold has a cavity;

[0008] Multiple threaded sleeves are arranged inside the mold cavity, and these multiple threaded sleeves are used to arrange along the wall surface of the blade;

[0009] Composite fillers, comprising a matrix resin and reinforcing fibers, are configured to fill the cavity of a mold cavity and / or the inner cavity of a blade to secure the threaded sleeve to the blade.

[0010] In some embodiments, a cooling pipe is provided inside the mold cavity.

[0011] In some embodiments, the distance between the inner wall of the mold and the outer wall of the blade is consistent along the periphery of the mold.

[0012] Secondly, this application provides a construction method for use with embedded bolt sleeves in blade pre-embedded construction fixtures. The method includes:

[0013] Multiple threaded sleeves are installed inside the mold cavity, and the multiple threaded sleeves are arranged along the wall of the blade;

[0014] The blades are installed in the area enclosed by multiple screw sleeves, so that the blades are in an upright position;

[0015] A composite filler is filled into the mold cavity, wherein the composite filler includes a matrix resin and reinforcing fibers;

[0016] The composite filler is cured.

[0017] In some embodiments, it also includes:

[0018] The composite filler is filled into the inner cavity of the blade.

[0019] In some embodiments, after filling the mold cavity with the composite filler, the following steps are included:

[0020] Compacted composite filler;

[0021] The mold cavity is evacuated to remove air bubbles from the composite filler.

[0022] In some embodiments, the volume of the reinforcing fiber accounts for more than 50% of the volume of the composite filler.

[0023] In some embodiments, after the composite filler has cured, it further includes:

[0024] The matrix resin includes at least one of epoxy resin, unsaturated polyester, and polyurethane;

[0025] And / or, the reinforcing fibers include at least one of glass fiber, carbon fiber, and polyester fiber.

[0026] In some embodiments, filling a mold cavity with a composite filler and curing the composite filler includes:

[0027] The composite filler is filled and cured multiple times, and the height of a single filling and curing process shall not exceed 6cm.

[0028] Thirdly, embodiments of this application provide a construction method, including:

[0029] Multiple threaded sleeves are installed inside the mold cavity, and the multiple threaded sleeves are arranged along the wall of the blade;

[0030] The blades are installed in the area enclosed by multiple screw sleeves, so that the blades are in an upright position;

[0031] A composite filler is filled into the mold cavity, wherein the composite filler includes a matrix resin and reinforcing fibers;

[0032] Cooling water is circulated through the cooling pipes to allow the composite filler to solidify.

[0033] This application provides a blade pre-embedded threaded sleeve pre-embedding construction tooling and its construction method. The blade pre-embedded threaded sleeve pre-embedding construction tooling includes a mold, multiple threaded sleeves, and a composite filler. The mold has a cavity, and the multiple threaded sleeves are arranged inside the cavity to keep the blade upright. The composite filler fills the cavity, thereby achieving the pre-embedding of the blade and the threaded sleeve. The composite filler includes a matrix resin and reinforcing fibers. Compared to achieving the pre-embedding of the blade and threaded sleeve through manual layup and resin injection, this application eliminates manual layup and utilizes the composite filler to ensure fixing strength and rigidity, thereby effectively reducing construction difficulty and shortening the construction period. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0035] Figure 1 A schematic diagram showing the usage status of the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application;

[0036] Figure 2 This is a structural schematic diagram of the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application;

[0037] Figure 3 Another structural schematic diagram of the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application;

[0038] Figure 4 Exploded view of the tooling for pre-embedded bolt sleeves for blades provided in this application;

[0039] Figure 5 A schematic diagram of the blade pre-embedded screw sleeve pre-embedded construction tooling and the blade structure provided in this application;

[0040] Figure 6 A perspective view of the blade and the blade itself, provided in this application for the pre-embedded bolt sleeve construction tooling.

[0041] Figure 7 A flowchart illustrating the construction method of the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application;

[0042] Figure 8 Another schematic diagram of the construction method for the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application;

[0043] Figure 9 This is a schematic diagram of the blade structure.

[0044] Explanation of reference numerals in the attached figures:

[0045] 100-Mold;

[0046] 110 - Mold cavity;

[0047] 120 - Base Plate;

[0048] 130 - Side panel;

[0049] 140-Top plate;

[0050] 200-screw insert;

[0051] 300-blade;

[0052] 310 - Inner cavity;

[0053] 400-Positioning plate.

[0054] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0055] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0056] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0057] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0058] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0059] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] As wind turbine blades become increasingly longer, the demand for blade tip testing is also growing. However, test blade tips are typically cut from full-size samples, lacking suitable fixing devices. The current mainstream method involves pre-embedding bolts on the outer side of the cut airfoil as a fixing device. This method offers high load-bearing capacity and reliability. However, pre-embedding bolts on the outer side of the airfoil requires specialized positioning fixtures to determine the bolt's location, followed by manual layering and resin injection. Due to the need for multiple injection molding processes, the construction of a single blade takes approximately 7 days. This method is complex, time-consuming, costly, and its construction volume is significantly affected by personnel limitations.

[0062] To address the aforementioned technical problems, this application provides a blade pre-embedded threaded sleeve pre-embedding construction tooling and its construction method. The blade pre-embedded threaded sleeve pre-embedding construction tooling includes a mold, multiple threaded sleeves, and a composite filler. The mold has a cavity, and the multiple threaded sleeves are disposed within the cavity. The multiple threaded sleeves are arranged along the blade wall to keep the blade in an upright position. The composite filler fills the cavity, thereby achieving the pre-embedding of the blade and threaded sleeve. The composite filler includes a matrix resin and reinforcing fibers. Compared to achieving the pre-embedding of the blade and threaded sleeve through manual layup and resin injection, this application eliminates manual layup and utilizes the composite filler to ensure fixing strength and rigidity, thereby effectively reducing construction difficulty and shortening the construction cycle.

[0063] Figure 1 A schematic diagram illustrating the usage status of the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application. Figure 2 This is a structural schematic diagram of the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application. Figure 3 This is a structural schematic diagram of the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application from another angle. Figure 4 Exploded view of the tooling for the pre-embedded screw sleeve of the blade provided in this application. Figure 5 The schematic diagram shows the pre-embedded screw sleeve construction tooling and the blade structure provided in this application. Figure 6 A perspective view of the blade and the blade itself, provided in this application for the pre-embedded bolt sleeve construction tooling.

[0064] See Figures 1 to 6 As shown in the figure, the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application embodiment includes a mold 100. The mold 100 is provided with a mold cavity 110.

[0065] The mold 100 is provided with a filling port and a vent hole that communicate with the mold cavity 110. The filling port is used to fill the composite filler. The vent hole is used to evacuate air from the mold cavity 110.

[0066] Specifically, the mold 100 includes a base plate 120, side plates 130, and a top plate. The base plate 120, side plates 130, and top plate 140 enclose a mold cavity 110 to ensure airtightness. The injection port can be located on the top plate 140, and the evacuation hole can be located on the base plate 120.

[0067] In some embodiments, the height of the mold 100 is 1000 mm. The mold 100 is machined from a steel plate.

[0068] In some embodiments, the shape of the mold 100 is designed to follow the airfoil of the blade 300, thereby helping to ensure the uniformity of the composite filler thickness. Alternatively, the distance between various positions of the sidewalls and the blade 300 can be adjusted as needed, thereby adjusting the composite filler thickness. It should be noted that the mold 100 in the accompanying drawings is merely an exemplary structure.

[0069] See Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the blade pre-embedded screw sleeve pre-embedding construction fixture includes multiple screw sleeves 200, which are disposed within the mold cavity 110. The multiple screw sleeves 200 are arranged along the wall surface of the blade 300 to keep the blade 300 in an upright state. The screw sleeves 200 can be disposed on the outside of the blade 300, or they can be disposed inside the blade 300.

[0070] It should be noted that the threaded sleeve 200 can be a commonly used threaded sleeve in related technologies. It can position and lock the screw connected to the base plate 120. The positioning and locking screw can be removed during demolding.

[0071] For example, the sleeve 200 includes a sleeve body, which is generally cylindrical and made of a high-strength metal material, such as stainless steel or alloy steel, to ensure sufficient strength and rigidity to withstand the load during testing. Its outer diameter needs to be designed according to the space and load-bearing requirements on the outer side of the blade airfoil, while its inner diameter must match the connecting bolt. It is usually provided with internal threads for threaded connection with the connecting bolts of the testing equipment.

[0072] The threaded sleeve 200 includes an outer surface structure. To enhance the bonding force between the threaded sleeve 200 and the blade 300 and effectively prevent the threaded sleeve 200 from loosening or being pulled out when the blade 300 is under stress, the outer surface of the sleeve body can be designed in various shapes. For example, an annular groove or a corrugated structure can be provided. During the vacuum infusion process, the composite filler can fill these grooves or corrugations to form a mechanical engagement, thereby improving the connection strength between the threaded sleeve 200 and the blade 300. This allows the stress at the joint between the threaded sleeve 200 and the blade 300 to be more uniform, improving the pull-out resistance.

[0073] The threaded sleeve 200 includes an end structure. The blade tip of the threaded sleeve 200 can be configured as a conical countersunk hole, with the maximum diameter end of the countersunk hole facing the blade tip. A plug can be installed inside to effectively prevent the composite filler from flowing into the threaded sleeve 200 during the blade 300 injection process, thus affecting the subsequent bolt connection. The blade root end is a cylindrical threaded through hole for mating with the connecting bolt.

[0074] The threaded sleeve 200 includes a limiting structure. To ensure the accurate positioning of the threaded sleeve 200 within the blade 300 and to effectively prevent relative movement between adjacent threaded sleeves 200, a limiting structure can be provided on the side wall of the threaded sleeve 200. For example, an annular limiting groove or an annular limiting boss can be provided, which, during the pre-embedding process, cooperates with the corresponding structure in the blade mold 100 to achieve more precise positioning of the threaded sleeve 200.

[0075] In some embodiments, the blade pre-embedded threaded sleeve pre-embedded construction tooling includes a composite filler, which is used to fill the mold cavity 110. The composite filler includes a matrix resin and reinforcing fibers.

[0076] Understandably, the matrix resin alone has low strength and is easily deformed, while the reinforcing fiber alone is loose and easily corroded. When the two are combined, the material has both the high strength and high rigidity of the reinforcing fiber and the easy molding and corrosion resistance of the matrix resin.

[0077] It is understood that the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this embodiment has the functions of positioning, shaping and curing of screw sleeve 200, which is conducive to shortening the construction process by using the same tooling.

[0078] In some embodiments, the threaded sleeve 200 is connected to the base plate 120.

[0079] In some embodiments, the blade pre-embedded threaded sleeve pre-embedding construction fixture includes a positioning plate 400, which is located within the mold cavity 110. The threaded sleeve 200 is connected to the positioning plate 400. The positioning plate 400 can be connected to the base plate 120.

[0080] In some embodiments, the volume of the reinforcing fiber accounts for more than 50% of the volume of the composite filler.

[0081] It should be noted that when the volume fraction of reinforcing fibers exceeds 50%, their "skeleton" role becomes more fully realized, becoming the dominant factor in material performance. The mechanical properties of the composite filler can be enhanced, with increased tensile strength, flexural strength, and stiffness (elastic modulus). This is because more fibers can participate in load-bearing, reducing deformation or breakage of the resin due to insufficient strength. Furthermore, the lightweight advantage is significant; if lightweight fibers such as carbon fiber are used, a higher proportion of reinforcing fibers can further reduce the density of the composite material. Moreover, the composite filler exhibits better dimensional stability; the coefficient of thermal expansion of fibers is typically lower than that of resin, and more reinforcing fibers can effectively suppress shrinkage or expansion caused by temperature changes, reducing product deformation.

[0082] For example, the volume of the reinforcing fiber accounts for 50%, 55%, 60%, 65%, 70%, 75%, or 80% of the volume of the composite filler.

[0083] In some embodiments, the matrix resin includes at least one of epoxy resin, unsaturated polyester, and polyurethane.

[0084] Epoxy resin can form a very strong interfacial bond with reinforcing fibers (especially carbon fiber and glass fiber), effectively transferring loads and significantly improving the tensile and flexural strength of composite materials. After curing, epoxy resin has high rigidity and low shrinkage, resulting in parts with high dimensional accuracy, slow performance degradation during long-term use, and excellent fatigue resistance.

[0085] Unsaturated polyester raw materials are inexpensive, and the curing process does not require expensive curing agents. Furthermore, unsaturated polyester has good flowability and can cure quickly.

[0086] Polyurethane exhibits high elasticity and ductility after curing, with a high elongation at break.

[0087] In some embodiments, the reinforcing fiber includes at least one of glass fiber, carbon fiber, and polyester fiber.

[0088] Fiberglass raw materials are readily available, the production process is mature, and the price is low. It has high tensile strength, which can effectively improve the rigidity of composite fillers, while also possessing a certain degree of toughness and not easily broken.

[0089] Carbon fiber has higher tensile strength and elastic modulus than glass fiber, enabling higher structural strength with less material, while also having a lower density and significant weight reduction. Furthermore, it exhibits slow performance degradation under long-term alternating loads and a long fatigue life.

[0090] Polyester fibers have a high elongation at break, which can effectively absorb impact energy, and the composite fillers made from them are not easily brittle.

[0091] In some embodiments, the length of the reinforcing fiber is less than the diameter of the threaded sleeve 200.

[0092] It should be noted that if the length of the reinforcing fiber exceeds the diameter of the threaded insert 200, it will cause physical or process conflicts in the pre-embedded area, which may easily affect the fixing effect of the threaded insert 200 and the performance of the composite material.

[0093] When embedding the threaded insert 200, it is essential to achieve a tight bond with the surrounding matrix resin and reinforcing fibers. If the reinforcing fibers are too long, they may easily become entangled, knotted, or locally accumulated on the outer wall of the threaded insert 200, preventing the matrix resin from fully impregnating the reinforcing fibers, resulting in "dry spots" or voids, and weakening the adhesion between the threaded insert 200 and the matrix resin. Furthermore, excessively long reinforcing fibers may cause friction during the installation of the threaded insert 200, preventing it from being accurately embedded in the designed position (e.g., tilting or offset), thus affecting the subsequent docking accuracy with testing equipment or connecting components. During the composite filler injection or molding process, excessively long reinforcing fibers can easily obstruct the flow of the matrix resin, especially in the narrow space around the threaded insert 200, easily causing insufficient filling of the matrix resin, forming molding defects such as air bubbles and insufficient glue, and reducing the local structural strength.

[0094] In some embodiments, the distance between the inner wall of the mold 100 and the outer wall of the blade 300 is consistent along the periphery of the mold 100. It should be noted that the distance between the inner wall of the mold 100 and the outer wall of the blade 300 is consistent along a cross section parallel to the horizontal plane.

[0095] In this way, the composite filler has a better uniform thickness, which is conducive to synchronous curing and shortens the overall curing time.

[0096] In some embodiments, the distance between the inner wall of the mold 100 and the outer wall of the blade 300 is no more than 6 cm. This helps to reduce the curing time.

[0097] For example, the distance between the inner wall of the mold 100 and the outer wall of the blade 300 is 1cm, 2cm, 3cm, 4cm, 5cm or 6cm, etc.

[0098] In some embodiments, a cooling pipe is provided within the mold cavity 110. The cooling pipe is used for the circulation of cooling water. It is understood that by providing a cooling pipe, the internal polymerization temperature can be controlled, which helps to reduce the curing time.

[0099] In some embodiments, a cooling pipe is provided at a position where the distance between the inner wall of the mold 100 and the outer wall of the blade 300 is greater than 6 cm, which is beneficial to equalize the curing time, thereby facilitating synchronous curing and shortening the overall curing time.

[0100] In some embodiments, the cooling pipe is a glass pipe.

[0101] Understandably, composite fillers are quite sensitive to impurities, and leaching from cooling pipes can affect the polymerization quality of the matrix resin and the bonding effect of reinforcing fibers. Glass, on the other hand, does not readily react with the matrix resin, curing agent, or cooling water, and unlike metal pipes, it does not leach ions or release additives. This effectively prevents impurities from interfering with the resin polymerization reaction, thus helping to ensure that the mechanical properties of the composite filler (such as strength and toughness) are not deteriorated.

[0102] In some embodiments, a heat dissipation device is provided inside the mold cavity 110. This allows for control of the internal polymerization temperature, which helps to reduce curing time.

[0103] Figure 7 A flowchart illustrating the construction method of the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application.

[0104] See Figure 7 As shown in the embodiment of this application, a construction method is provided, which uses the above-mentioned blade pre-embedded screw sleeve pre-embedded construction tooling. The method includes:

[0105] S101. Install multiple threaded sleeves inside the mold cavity, with the multiple threaded sleeves arranged along the wall of the blade.

[0106] S102. Install the blade in the area enclosed by multiple threaded sleeves, with the blade in an upright position.

[0107] S103. Fill the mold cavity with the composite filler. The composite filler includes a matrix resin and reinforcing fibers.

[0108] S104, Composite filler cured. This allows the threaded sleeve 200 to be fixed onto the blade 300.

[0109] Specifically, a combination of "matrix resin + reinforcing fiber" is adopted. Short fibers impregnated with matrix resin are added into mold 100, compacted, degassed and cured to achieve the pre-embedded shape of threaded sleeve 200.

[0110] Figure 8 Another schematic diagram of the construction method for the blade pre-embedded screw sleeve pre-embedded construction tooling provided in this application.

[0111] See Figure 8 As shown, in some embodiments, the method further includes:

[0112] The number of pre-embedded threaded sleeves 200 and the height of the composite filler are designed according to the load borne by the blade root.

[0113] Specifically, a safety margin is set for the quantity of threaded inserts 200, with a safety margin of at least 3. A safety margin is set for the height of the composite filler, with a safety margin of at least 3mm.

[0114] The threaded insert 200 is sandblasted and then wound with wire. It's understandable that sandblasting, through high-speed abrasive impact on the surface of the threaded insert 200, optimizes the surface condition, laying the foundation for wire winding. Wrapping wire on the roughened surface after sandblasting further optimizes the fit between the threaded insert 200 and external components, stabilizing the connection and protecting the mating surfaces.

[0115] Install the pre-embedded threaded sleeve 200 on the positioning plate 400 with the threaded sleeve 200 facing vertically upwards, and seal the tail end.

[0116] The reinforced area of ​​blade 300 is sanded to remove dust, and then covered with 2-3 layers of cloth. Sanding removes the smooth layer, oxide layer, or residual adhesive layer from the blade surface, creating a rough surface that significantly increases the contact area between the cloth and blade 300. This allows the composite filler to penetrate and adhere more fully, ensuring the cloth layer is less prone to detachment. The reinforced area of ​​blade 300 is typically a stress concentration point (such as the blade root or edge) or a vulnerable area. Two to three layers of cloth (mostly glass cloth or carbon fiber cloth) enhance the tensile and bending resistance of this area through the high strength of the fibers, reducing the risk of deformation and breakage during testing or use. Furthermore, subsequent non-destructive testing (such as ultrasonic testing or penetrant testing) is required. The original blade surface may have unevenness or irregular patterns, affecting the accuracy of the test signals. Two to three layers of cloth create a smooth, uniform surface, making it easier for testing equipment to obtain clear data. The cloth itself can also serve as a "reference layer" to aid in judging the internal quality of the reinforced area.

[0117] Place the blade 300 vertically into the mold 100, and use the positioning plate 400 to determine the position of the blade 300 and place it vertically.

[0118] Reinforcing fibers impregnated with matrix resin are added to mold 100, filled, and compacted. The mold cavity 110 is then sealed using top plate 140. Specifically, the reinforcing fibers are chopped fibers with a volume content of not less than 50%.

[0119] The mold cavity 110 is degassed to remove air bubbles, and then cured.

[0120] Understandably, evacuating the mold cavity 110 is used to ensure sufficient resin flow and reduce air bubbles.

[0121] Specifically, the entire filling and curing process can be carried out in multiple stages, with the height of each filling and curing stage controlled within 6cm. This helps to avoid excessive heat release during curing. Alternatively, cooling can be achieved through cooling pipes, allowing for a single-stage curing process.

[0122] After the composite filler has cured, remove the mold 100.

[0123] Use an angle grinder to remove sharp corners and burrs.

[0124] Non-destructive testing is used to determine the curing state.

[0125] Specifically, if there are no problems, the task can be completed. If there are problems, they will be repaired.

[0126] Figure 9 This is a schematic diagram of the blade structure.

[0127] See Figure 9 As shown, in some embodiments, the method further includes filling the cavity 310 of the blade 300 with a composite filler.

[0128] It is understandable that the blade is a hollow structure. When the blade 300 is cut off from the tip, the blade 300 has an inner cavity 310 with openings at the top and bottom. Filling the inner cavity 310 and the mold cavity 110 of the blade 300 with composite filler can simultaneously strengthen both the inner cavity 310 and the outer side of the blade 300.

[0129] It should be noted that, in order to reduce the impact of filling the inner cavity 310 of the blade 300 with composite filler on the test results, the actual length of the blade 300 can be greater than the theoretical length. For example, if a 1m blade needs to be cut, a 1.5m blade can be cut for actual testing.

[0130] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A blade pre-buried sleeve pre-buried construction tool, characterized in that, The method comprises: a mold provided with a mold cavity; a plurality of threaded sleeves arranged in the mold cavity, the plurality of threaded sleeves being arranged along a wall surface of a blade; a composite filler comprising a matrix resin and reinforcing fibers, the composite filler being configured to fill the mold cavity to fix the threaded sleeves on the blade.

2. The blade bushing pre-embedding construction tool according to claim 1, characterized in that, The mold cavity is provided with a cooling pipe.

3. The blade bushing pre-embedding construction tool according to claim 1, characterized in that, The distance between the inner wall of the mold and the outer wall of the blade is uniform along the circumferential side of the mold.

4. A construction method, characterized by, The method for applying the blade threaded sleeve embedding construction tooling of any one of claims 1 to 3 comprises: arranging a plurality of threaded sleeves in the mold cavity of the mold, the plurality of threaded sleeves being arranged along a wall surface of a blade; arranging the blade in an area surrounded by the plurality of threaded sleeves, so that the blade is in an upright state; filling a composite filler into the mold cavity, wherein the composite filler comprises a matrix resin and reinforcing fibers; curing the composite filler.

5. The construction method according to claim 4, characterized in that, The method further comprises: filling the composite filler into an inner cavity of the blade.

6. The construction method according to claim 4, characterized in that, After filling the composite filler into the mold cavity, the method comprises: compacting the composite filler; vacuumizing the mold cavity to remove air bubbles in the composite filler.

7. The construction method according to claim 4, characterized in that, The volume ratio of the reinforcing fibers to the composite filler is greater than 50%.

8. The construction method according to claim 4, characterized in that, After curing the composite filler, the method further comprises: the matrix resin comprises at least one of epoxy resin, unsaturated polyester, and polyurethane; and / or, the reinforcing fibers comprise at least one of glass fiber, carbon fiber, and polyester fiber.

9. The construction method according to claim 4, characterized in that, Filling the composite filler into the mold cavity and curing the composite filler comprises: filling and curing the composite filler multiple times, and the height of a single filling and curing is not greater than 6 cm.

10. A construction method, characterized by, The method for applying the blade threaded sleeve embedding construction tooling of claim 2 comprises, arranging a plurality of threaded sleeves in the mold cavity of the mold, the plurality of threaded sleeves being arranged along a wall surface of a blade; arranging the blade in an area surrounded by the plurality of threaded sleeves, so that the blade is in an upright state; filling a composite filler into the mold cavity, wherein the composite filler comprises a matrix resin and reinforcing fibers; supplying cooling water to the cooling pipe to cure the composite filler.

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