Pouring forming method for large wind power blade
By using widely distributed rubber filling pipe networks and vacuum bags to inject glue liquid during the molding of large wind power blades, the problem of low glue filling efficiency of traditional rubber filling methods is solved, and efficient molding and strength improvement is achieved.
Patent Information
- Application Number
- CN202411619505.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-01-07
AI Technical Summary
The traditional glue filling method has a small range of glue filling pipes, resulting in a reduction in glue filling efficiency during the forming process of large wind power blades.
The combination of at least three longitudinal filling pipes and six transverse filling pipes is adopted to form a widely distributed filling pipe network, which is coated through a vacuum bag and sealed with the glue liquid supply device, and vacuum injected into the glue liquid to soak the glue liquid into the reinforcement material layer. , and heat-cured in the molding mold.
It improves the infusion efficiency and infiltration effect, shortens the glue filling time, adapts to the length and area of large wind power blades, improves the forming efficiency and overall strength, and reduces the defect rate.
Smart Images
Figure CN119261243A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of large-scale wind turbine blade molding, and in particular to a large-scale wind turbine blade infusion molding method. Background Art
[0002] Wind turbines are devices that convert wind energy into electrical energy, and wind turbine blades are one of the core components of wind turbines. At present, wind turbine blades of 5 MW and below are gradually being phased out, and wind turbine blades have begun to develop towards 7 MW and above. Wind turbine blades of 5 MW and below are conventional wind turbine blades, and their length is usually between 40 meters and 65 meters; while wind turbine blades of 7 MW and above are large wind turbine blades, and their length is more than 90 meters.
[0003] In the production of wind turbine blades, glue pouring is an important production link. Conventional wind turbine blades are characterized by short length, small windward surface area and small leeward surface area, so in the traditional glue pouring method, the laying range of the glue pouring hose is small. However, for large wind turbine blades over 90 meters, the laying range of the glue pouring hose in the traditional glue pouring method is too small and cannot adapt to the length, windward surface area and leeward surface area of large wind turbine blades, resulting in reduced glue pouring efficiency. Summary of the invention
[0004] A technical problem to be solved by the present invention is that in the molding process of large-scale wind turbine blades, the traditional glue pouring method leads to a decrease in glue pouring efficiency due to the small laying range of the glue pouring pipe.
[0005] In order to solve the above technical problems, the present invention provides a large-scale wind turbine blade infusion molding method, which comprises: S1, laying a reinforcement material layer in a molding mold to form a blade blank; S2, laying at least three longitudinal glue pouring tubes and at least six transverse glue pouring tubes on the top surface of the blade blank; the longitudinal glue pouring tubes extend along the direction from the root of the blade blank to the tip of the blade blank, and all the longitudinal glue pouring tubes are spaced apart in the width direction of the blade blank; the transverse glue pouring tubes extend along the width direction of the blade blank, and all the transverse glue pouring tubes are spaced apart in the length direction of the blade blank; S 3. Cover the blade blank, the longitudinal glue pouring tube and the transverse glue pouring tube with a vacuum bag, and seal and connect the longitudinal glue pouring tube and the transverse glue pouring tube to the glue providing device respectively; S4. Evacuate the vacuum bag to a preset vacuum degree, and then the glue providing device injects glue into the vacuum bag through the longitudinal glue pouring tube and the transverse glue pouring tube, so that the glue penetrates the reinforcing material layer; S5. Heat the blade blank in the molding mold to solidify the blade blank to form a large wind turbine blade; and S6. After the blade blank is cooled, demould the solidified blade blank, and remove the longitudinal glue pouring tube, the transverse glue pouring tube and the vacuum bag.
[0006] In some embodiments, the blade blank includes a first curved edge and a second curved edge spaced apart in its width direction, and a plurality of first glue holes spaced apart are provided on the wall of the longitudinal glue pouring tube; step S2 further includes: first laying and fixing the longitudinal glue pouring tube distributed close to the first curved edge, and making the extension path of the longitudinal glue pouring tube close to the first curved edge parallel to the extension path of the first curved edge; and then laying other longitudinal glue pouring tubes.
[0007] In some embodiments, step S2 further includes: laying and fixing the longitudinal glue pipe distributed near the second curved edge, and making the extension path of the longitudinal glue pipe near the second curved edge parallel to the extension path of the second curved edge; finally, laying other longitudinal glue pipes between the longitudinal glue pipe distributed near the first curved edge and the longitudinal glue pipe distributed near the second curved edge and fixing them.
[0008] In some embodiments, step S2 further includes: the number of longitudinal glue pouring pipes laid is three, and the three longitudinal glue pouring pipes are respectively the first glue pouring pipe, the second glue pouring pipe and the third glue pouring pipe; the first glue pouring pipe is distributed close to the edge of the first curve, and the distance between the head end of the first glue pouring pipe and the root edge of the blade blank is 0.8-1.2m; the third glue pouring pipe is distributed close to the edge of the second curve, and the distance between the head end of the second glue pouring pipe and the root edge of the blade blank is 0.8-1.2m; the second glue pouring pipe is located between the first glue pouring pipe and the third glue pouring pipe, and the distance between the head end of the third glue pouring pipe and the root edge of the blade blank is 0.8-1.2m.
[0009] In some embodiments, step S2 further includes: the distance between the end of the first glue pouring tube and the tip edge of the blade blank is in the range of 35m-40m; the distance between the end of the second glue pouring tube and the tip edge of the blade blank is in the range of 5m-9m; the distance between the end of the third glue pouring tube and the tip edge of the blade blank is in the range of 25m-30m.
[0010] In some embodiments, step S2 further includes: the number of transverse glue pouring pipes laid is at least 10, all transverse glue pouring pipes are evenly spaced, and the spacing between two adjacent transverse glue pouring pipes is 6m-8m; a plurality of second glue pouring holes distributed at intervals are provided on the wall of the transverse glue pouring pipe.
[0011] In some embodiments, step S2 further includes: the distance between the head end of the transverse glue pouring pipe and the first curved edge is in the range of 0.8m-1.2m, and the distance between the end of the transverse glue pouring pipe and the second curved edge is in the range of 0.8m-1.2m.
[0012] In some embodiments, step S2 further includes: setting a three-way joint at the intersection of the longitudinal glue filling pipe and the transverse glue filling pipe, and the two outlets of the three-way joint are respectively sealed and connected to the longitudinal glue filling pipe and the transverse glue filling pipe, and the inlet of the three-way joint is used to connect with the glue liquid providing device.
[0013] In some embodiments, step S4 further includes: evacuating the vacuum bag so that the vacuum degree in the vacuum bag is a negative pressure of 30-20 Pa.
[0014] In some embodiments, step S1 also includes: laying a release cloth, a porous membrane and a guide net on the top surface of the blade blank in sequence; step S2 also includes: laying a longitudinal glue pouring tube and a transverse glue pouring tube on the top surface of the guide net; step S6 also includes: removing the release cloth, the porous membrane and the guide net.
[0015] The above technical solution of the present invention has the following beneficial effects:
[0016] At least three longitudinal glue-filling tubes extend from the root of the blade blank to its tip, and all longitudinal glue-filling tubes are spaced apart in the width direction of the blade blank; at the same time, at least six transverse glue-filling tubes extend along the width direction of the blade blank, and all transverse glue-filling tubes are spaced apart in the length direction of the blade blank, so that all longitudinal glue-filling tubes and transverse glue-filling tubes form a glue-filling pipe network, and the distribution range of the glue-filling pipe network is relatively wide, which can fully adapt to the length, windward surface area and leeward surface area of large wind turbine blades, and the glue can flow out from the ports of each longitudinal glue-filling tube and transverse glue-filling tube, thereby improving the filling efficiency and the infiltration effect. In addition, since multiple transverse glue-filling tubes are provided and the length of the transverse glue-filling tubes is relatively short, the flow path of the glue in the transverse glue-filling tubes is relatively short, and the filling pressure of the glue increases, thereby further shortening the glue-filling time, improving the glue-filling efficiency, and shortening the molding time of large wind turbine blades. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the process of a large wind turbine blade injection molding method according to an embodiment of the present invention;
[0018] Figure 2 It is a schematic diagram of laying the horizontal glue filling pipe and the vertical glue filling pipe in one embodiment of the present invention.
[0019] Description of Reference Numerals
[0020] 1. Blade blank; 2. Longitudinal glue pouring tube; 3. Transverse glue pouring tube; 4. First curved edge; 5. Second curved edge; 6. First glue pouring tube; 7. Second glue pouring tube; 8. Third glue pouring tube. DETAILED DESCRIPTION
[0021] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention, rather than to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.
[0022] like Figure 1 and Figure 2 As shown, the present invention provides a large-scale wind turbine blade infusion molding method, which comprises: S1, laying a reinforcement material layer in a molding mold to form a blade blank 1; S2, laying at least three longitudinal glue pouring tubes 2 and at least six transverse glue pouring tubes 3 on the top surface of the blade blank 1; the longitudinal glue pouring tubes 2 extend in the direction from the root of the blade blank 1 to the tip thereof, and all the longitudinal glue pouring tubes 2 are spaced apart in the width direction of the blade blank 1; the transverse glue pouring tubes 3 extend in the width direction of the blade blank 1, and all the transverse glue pouring tubes 3 are spaced apart in the length direction of the blade blank 1; S3, The blade blank 1, the longitudinal glue pouring tube 2 and the transverse glue pouring tube 3 are covered with a vacuum bag, and the longitudinal glue pouring tube 2 and the transverse glue pouring tube 3 are sealed and connected with the glue providing device; S4, the vacuum bag is evacuated to a preset vacuum degree, and then the glue providing device injects glue into the vacuum bag through the longitudinal glue pouring tube 2 and the transverse glue pouring tube 3, so that the glue penetrates the reinforcing material layer; S5, the blade blank 1 in the molding mold is heated to solidify the blade blank 1 to form a large wind turbine blade; and S6, after the blade blank 1 is cooled, the solidified blade blank 1 is demoulded, and the longitudinal glue pouring tube 2, the transverse glue pouring tube 3 and the vacuum bag are removed.
[0023] Specifically, in step S1, a reinforcement material layer is laid to form a blade blank 1, and the shape and size of the blade blank 1 are substantially the same as those of a large fan blade, so as to facilitate subsequent heating and molding. For example, the root of the blade blank 1 is also the root of a large fan blade, the tip of the blade blank 1 is also the tip of a large fan blade, and the two curved edges of the blade blank 1 are also the two curved edges of a large fan blade. In step S2, at least three longitudinal glue filling tubes 2 extend from the root of the blade blank 1 to the tip thereof, and all longitudinal glue filling tubes 2 are spaced apart in the width direction of the blade blank 1; at the same time, at least six transverse glue filling tubes 3 extend along the width direction of the blade blank 1, and all transverse glue filling tubes 3 are spaced apart in the length direction of the blade blank 1, so that all longitudinal glue filling tubes 2 and transverse glue filling tubes 3 form a glue filling pipe network, and the distribution range of the glue filling pipe network is relatively wide, which can fully adapt to the length, windward surface area and leeward surface area of large wind turbine blades, and the glue can flow out from the ports of each longitudinal glue filling tube 2 and transverse glue filling tube 3, thereby improving the filling efficiency and the infiltration effect. In addition, since a plurality of transverse glue filling tubes 3 are provided, and the length of the transverse glue filling tubes 3 is relatively short, the flow path of the glue in the transverse glue filling tubes 3 is shortened, and the filling pressure of the glue is increased, thereby shortening the glue filling time, improving the glue filling efficiency, and shortening the molding time of large wind turbine blades. In steps S3 and S4, after the vacuum bag is evacuated, the negative pressure in the vacuum bag can draw the glue in the glue supply device into the vacuum bag, and the glue will gradually infiltrate the reinforcing material layer. In steps S5 and S6, the blade blank 1 in the molding mold is heated, and the blade blank 1 is solidified into a large wind turbine blade, and then the blade blank 1 is cooled and demolded, and finally the longitudinal glue filling tube 2, the transverse glue filling tube 3 and the vacuum bag are removed.
[0024] In the embodiment, at least three longitudinal glue filling tubes 2 extend from the blade root of the blade blank 1 to the blade tip thereof, and all longitudinal glue filling tubes 2 are spaced apart in the width direction of the blade blank 1; at the same time, at least six transverse glue filling tubes 3 extend along the width direction of the blade blank 1, and all transverse glue filling tubes 3 are spaced apart in the length direction of the blade blank 1, so that all longitudinal glue filling tubes 2 and transverse glue filling tubes 3 form a glue filling pipe network, and the distribution range of the glue filling pipe network is relatively wide, which can fully adapt to the length, windward surface area and leeward surface area of large wind turbine blades, and the glue can flow out from the ports of each longitudinal glue filling tube 2 and transverse glue filling tube 3, thereby improving the filling efficiency and the infiltration effect. In addition, since a plurality of transverse glue filling tubes 3 are provided, and the length of the transverse glue filling tubes 3 is relatively short, the flow path of the glue in the transverse glue filling tubes 3 is relatively short, and the filling pressure of the glue increases, thereby further shortening the glue filling time, improving the glue filling efficiency, and shortening the molding time of large wind turbine blades.
[0025] like Figure 2As shown, in some embodiments of the present invention, the blade blank 1 includes a first curved edge 4 and a second curved edge 5 spaced apart in the width direction thereof, and a plurality of first glue holes spaced apart are provided on the wall of the longitudinal glue injection tube 2. Step S2 further includes: (1) firstly laying the longitudinal glue injection tube 2 distributed near the first curved edge 4 and fixing it, and making the extension path of the longitudinal glue injection tube 2 near the first curved edge 4 parallel to the extension path of the first curved edge 4; (2) then laying other longitudinal glue injection tubes 2.
[0026] Specifically, since the extension path of the longitudinal glue pouring tube 2 near the first curved edge 4 is parallel to the extension path of the first curved edge 4, it is helpful to make the glue flow along the extension direction of the first curved edge 4, so that the glue fully infiltrates the edge of the blade blank 1, and the glue is evenly distributed on the edge of the blade blank 1. In addition, the first glue pouring hole can shorten the flow path of the glue in the longitudinal glue pouring tube 2, increase the glue pouring amount per unit time, and improve the glue pouring efficiency.
[0027] like Figure 2 As shown, in some embodiments of the present invention, step S2 further includes: (1) laying and fixing the longitudinal glue pipe 2 distributed near the second curved edge 5, and making the extension path of the longitudinal glue pipe 2 near the second curved edge 5 parallel to the extension path of the second curved edge 5; (2) finally laying other longitudinal glue pipes 2 between the longitudinal glue pipe 2 distributed near the first curved edge 4 and the longitudinal glue pipe 2 distributed near the second curved edge 5 and fixing them.
[0028] Specifically, since the extension path of the longitudinal glue filling tube 2 close to the second curved edge 5 is parallel to the extension path of the second curved edge 5, it helps to make the glue flow along the extension direction of the second curved edge 5, so that the glue can fully infiltrate the edge of the blade blank 1 and make the glue evenly distributed on the edge of the blade blank 1.
[0029] like Figure 2 As shown, in some embodiments of the present invention, step S2 further includes: the number of longitudinal glue pouring pipes 2 laid is three, and the three longitudinal glue pouring pipes 2 are respectively the first glue pouring pipe 6, the second glue pouring pipe 7 and the third glue pouring pipe 8; the first glue pouring pipe 6 is distributed close to the first curved edge 4, and the distance between the head end of the first glue pouring pipe 6 and the root edge of the blade blank 1 is 0.8-1.2m; the third glue pouring pipe 8 is distributed close to the second curved edge 5, and the distance between the head end of the second glue pouring pipe 7 and the root edge of the blade blank 1 is 0.8-1.2m; the second glue pouring pipe 7 is located between the first glue pouring pipe 6 and the third glue pouring pipe 8, and the distance between the head end of the third glue pouring pipe 8 and the root edge of the blade blank 1 is 0.8-1.2m.
[0030] Specifically, the spacing between the first glue filling tube 6 and the blade root edge, the spacing between the second glue filling tube 7 and the blade root edge, and the spacing between the third glue filling tube 8 and the blade root edge are equal, so the glue flowing out from the first end of the first glue filling tube 6, the first end of the second glue filling tube 7, and the first end of the third glue filling tube 8 can reach the blade root edge at the same time, which helps to make the glue evenly distributed on the edge of the blade blank 1. In addition, the width of the blade root is relatively large, and the three longitudinal glue filling tubes 2 are filled with glue at the same time, which can improve the glue filling efficiency.
[0031] In some embodiments of the present invention, step S2 further includes: the distance between the end of the first glue filling tube 6 and the tip edge of the blade blank 1 is in the range of 35m-40m; the distance between the end of the second glue filling tube 7 and the tip edge of the blade blank 1 is in the range of 5m-9m; the distance between the end of the third glue filling tube 8 and the tip edge of the blade blank 1 is in the range of 25m-30m.
[0032] Specifically, since a plurality of transverse glue pouring pipes 3 are provided, the transverse glue pouring pipes 3 and the longitudinal glue pouring pipes 2 form a glue pouring pipe network with a wider distribution range, and the glue pouring efficiency is significantly improved. At this time, the ends of the first glue pouring pipe 6, the second glue pouring pipe 7, and the third glue pouring pipe 8 are set to the above-mentioned spacing range, that is, the positions of the ends of the three longitudinal glue pouring pipes 2 are appropriately adjusted, so that the ends of the three longitudinal glue pouring pipes 2 match a more suitable glue pouring range, which helps to make the glue liquid evenly distributed.
[0033] In some embodiments of the present invention, step S2 further includes: the number of transverse glue pouring pipes 3 laid is at least 10 (for example, 10-13), all transverse glue pouring pipes 3 are evenly spaced, and the spacing between two adjacent transverse glue pouring pipes 3 is 6m-8m; a plurality of second glue pouring holes distributed at intervals are provided on the wall of the transverse glue pouring pipe 3.
[0034] Specifically, the number of transverse glue filling tubes 3 laid is appropriately increased, and the number of longitudinal glue filling tubes 2 is appropriately reduced (only three longitudinal glue filling tubes 2 are set), the flow path of the glue in the glue filling tube is shortened, and the injection pressure of the glue is increased, thereby shortening the glue filling time, improving the glue filling efficiency, and shortening the molding time of large wind turbine blades. In addition, appropriately increasing the number of transverse glue filling tubes 3 laid can promote the glue to uniformly infiltrate the reinforcing material layer, improve the uniformity of glue filling, improve the infiltration effect of glue filling, increase the strength of glue filling, and effectively improve the overall strength of large wind turbine blades. In addition, appropriately increasing the number of transverse glue filling tubes 3 laid can significantly reduce the defect rate of large wind turbine blades. For example, it can effectively reduce the white spot area of large wind turbine blades, reduce the number of white spots, and may even completely eliminate the formation of white spots; and due to sufficient infiltration, it can even completely eliminate the formation of dry fibers, thereby eliminating the risk of large wind turbine blades breaking at the dry fiber position or at the white spot position. In addition, the second glue pouring hole can shorten the flow path of the glue in the transverse glue pouring tube 3 and increase the glue pouring amount per unit time, thereby improving the glue pouring efficiency.
[0035] In some embodiments of the present invention, step S2 further includes: the distance between the head end of the transverse glue pipe 3 and the first curved edge 4 is in the range of 0.8m-1.2m, and the distance between the end of the transverse glue pipe 3 and the second curved edge 5 is in the range of 0.8m-1.2m.
[0036] Specifically, the distance between the head end of the transverse glue pouring tube 3 and the first curved edge 4 is small, and the distance between the end of the transverse glue pouring tube 3 and the second curved edge 5 is small, which helps to allow sufficient glue to flow to the edge of the blade blank 1, thereby fully infiltrating the edge of the blade blank 1. In addition, the first curved edge 4 and the second curved edge 5 are respectively kept at an appropriate distance from the transverse glue pouring tube 3 to facilitate the flow and uniform distribution of the glue.
[0037] In some embodiments of the present invention, step S2 further includes: setting a three-way joint at the intersection of the longitudinal glue filling pipe 2 and the transverse glue filling pipe 3, and the two outlets of the three-way joint are respectively sealed and connected with the longitudinal glue filling pipe 2 and the transverse glue filling pipe 3, and the inlet of the three-way joint is used to connect with the glue liquid providing device.
[0038] Specifically, by providing a three-way joint, the glue can flow through the three-way joint to the longitudinal glue filling pipe 2 and the transverse glue filling pipe 3 at the same time, shortening the glue flow path, increasing the glue filling pressure, thereby shortening the glue filling time and improving the glue filling efficiency. In addition, the glue flowing in the longitudinal glue filling pipe 2 and the transverse glue filling pipe 3 will not interfere with each other, and the glue filling pressure loss is also avoided.
[0039] In some embodiments of the present invention, step S4 further includes: evacuating the vacuum bag so that the vacuum degree in the vacuum bag is a negative pressure of 30-20 Pa.
[0040] Specifically, the transverse glue pouring pipe 3 and the longitudinal glue pouring pipe 2 form a widely distributed glue pouring pipe network. At the same time, the distance between the transverse glue pouring pipe 3 and the two curved edges is controlled within the above-mentioned preset range, and the distance between the longitudinal glue pouring pipe 2 and the blade root and blade tip is controlled within the above-mentioned preset range. After the vacuum degree of the vacuum bag is set to the above-mentioned preset range, the glue can fully infiltrate the reinforcing material layer at an appropriate flow rate, and the glue is evenly distributed.
[0041] In some embodiments of the present invention, step S1 also includes: laying a release cloth, a porous membrane and a guide net in sequence on the top surface of the blade blank 1; step S2 also includes: laying a longitudinal glue pouring pipe 2 and a transverse glue pouring pipe 3 on the top surface of the guide net; step S6 also includes: removing the release cloth, the porous membrane and the guide net.
[0042] Specifically, laying demoulding cloth and porous membrane can make it easier to demould the cured product. The demoulding cloth can be made of materials with low surface activity such as tetrafluoroethylene, which has strong anti-stickiness and can improve the roughness of the product surface after demoulding. The porous membrane is a porous polyolefin resin plastic film that has a filtering and penetration effect on the glue. The guide net is made of a mesh material with high permeability, such as a three-dimensional mesh structure made of high-density polyethylene material. The guide net can guide the glue to be evenly distributed.
[0043] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the present invention to other occasions without improvement, should be regarded as the protection scope of the present invention.
Claims
1. A large wind turbine blade infusion molding method, characterized in that: include: S1, laying a reinforcement material layer in a forming mold to form a blade blank (1); S2. At least three longitudinal glue pouring pipes (2) and at least six transverse glue pouring pipes (3) are laid on the top surface of the blade blank (1); the longitudinal glue pouring pipes (2) extend in the direction from the blade root to the blade tip of the blade blank (1), and all the longitudinal glue pouring pipes (2) are spaced apart in the width direction of the blade blank (1); the transverse glue pouring pipes (3) extend in the width direction of the blade blank (1), and all the transverse glue pouring pipes (3) are spaced apart in the length direction of the blade blank (1); S3, covering the blade blank (1), the longitudinal glue pouring pipe (2) and the transverse glue pouring pipe (3) with a vacuum bag, and sealingly connecting the longitudinal glue pouring pipe (2) and the transverse glue pouring pipe (3) to a glue liquid providing device respectively; S4, evacuating the vacuum bag to a preset vacuum degree, and then the glue providing device injects glue into the vacuum bag through the longitudinal glue filling pipe (2) and the transverse glue filling pipe (3), so that the glue penetrates the reinforcing material layer; S5, heating the blade blank (1) in the forming mold to solidify the blade blank (1) to form a large wind turbine blade; as well as S6. After the blade blank (1) is cooled, the solidified blade blank (1) is demoulded, and the longitudinal glue pouring tube (2), the transverse glue pouring tube (3) and the vacuum bag are removed.
2. The large wind turbine blade infusion molding method according to claim 1, characterized in that: The blade blank (1) comprises a first curved edge (4) and a second curved edge (5) which are spaced apart in the width direction thereof, and a plurality of first glue injection holes which are spaced apart are provided on the wall of the longitudinal glue injection tube (2); The step S2 further comprises: firstly laying the longitudinal glue-filling pipe (2) distributed near the first curved edge (4) and fixing it, and making the extension path of the longitudinal glue-filling pipe (2) near the first curved edge (4) parallel to the extension path of the first curved edge (4); Then, the other longitudinal glue-filled pipes (2) are laid.
3. The large wind turbine blade infusion molding method according to claim 2, characterized in that: The step S2 further comprises: laying and fixing the longitudinal glue pouring pipe (2) distributed near the second curved edge (5), and making the extension path of the longitudinal glue pouring pipe (2) near the second curved edge (5) parallel to the extension path of the second curved edge (5); Finally, the other longitudinal glue pouring pipes (2) are laid between the longitudinal glue pouring pipes (2) distributed close to the first curved edge (4) and the longitudinal glue pouring pipes (2) distributed close to the second curved edge (5) and fixed.
4. The large wind turbine blade infusion molding method according to claim 3, characterized in that: The step S2 further comprises: the number of the longitudinal glue pouring pipes (2) is three, and the three longitudinal glue pouring pipes (2) are respectively a first glue pouring pipe (6), a second glue pouring pipe (7) and a third glue pouring pipe (8); The first glue pouring pipe (6) is distributed close to the first curved edge (4), and the distance between the head end of the first glue pouring pipe (6) and the blade root edge of the blade blank (1) is 0.8-1.2 m; the third glue pouring pipe (8) is distributed close to the second curved edge (5), and the distance between the head end of the second glue pouring pipe (7) and the blade root edge of the blade blank (1) is 0.8-1.2 m; the second glue pouring pipe (7) is located between the first glue pouring pipe (6) and the third glue pouring pipe (8), and the distance between the head end of the third glue pouring pipe (8) and the blade root edge of the blade blank (1) is 0.8-1.2 m.
5. The large wind turbine blade infusion molding method according to claim 4, characterized in that: The step S2 further comprises: the distance between the end of the first glue pouring tube (6) and the tip edge of the blade blank (1) is in the range of 35m-40m; the distance between the end of the second glue pouring tube (7) and the tip edge of the blade blank (1) is in the range of 5m-9m; the distance between the end of the third glue pouring tube (8) and the tip edge of the blade blank (1) is in the range of 25m-30m.
6. The large wind turbine blade infusion molding method according to claim 5, characterized in that: The step S2 further comprises: the number of the transverse glue injection pipes (3) to be laid is at least 10, all the transverse glue injection pipes (3) are distributed at equal intervals, and the interval between two adjacent transverse glue injection pipes (3) is in the range of 6m-8m; a plurality of second glue injection holes distributed at intervals are provided on the pipe wall of the transverse glue injection pipe (3).
7. The large wind turbine blade infusion molding method according to claim 6, characterized in that: The step S2 further comprises: the distance between the head end of the transverse glue injection pipe (3) and the first curved edge (4) is in the range of 0.8m-1.2m, and the distance between the end of the transverse glue injection pipe (3) and the second curved edge (5) is in the range of 0.8m-1.2m.
8. The large wind turbine blade infusion molding method according to claim 6, characterized in that: The step S2 further comprises: providing a three-way joint at the intersection of the longitudinal glue pouring pipe (2) and the transverse glue pouring pipe (3), and the two outlets of the three-way joint are respectively sealed and connected with the longitudinal glue pouring pipe (2) and the transverse glue pouring pipe (3), and the inlet of the three-way joint is used to communicate with the glue liquid providing device.
9. The large wind turbine blade infusion molding method according to claim 6, characterized in that: The step S4 further includes: evacuating the vacuum bag so that the vacuum degree in the vacuum bag is a negative pressure of 30-20 Pa.
10. The large wind turbine blade infusion molding method according to claim 1, characterized in that: The step S1 further comprises: laying a release cloth, a porous membrane and a guide net in sequence on the top surface of the blade blank (1); The step S2 further comprises: laying the longitudinal glue pouring pipe (2) and the transverse glue pouring pipe (3) on the top surface of the guide net; The step S6 further includes: removing the release cloth, the porous membrane and the guide net.