Forming method of trailing edge auxiliary beam, trailing edge auxiliary beam, blade and wind generating set

Abstract

The invention provides a forming method of a trailing edge auxiliary beam, the trailing edge auxiliary beam, a blade and a wind generating set. The forming method comprises the steps that a first section of the trailing edge auxiliary beam is formed through a pultrusion process, and the spanwise section of the first section is a cambered surface; forming a second section of the trailing edge auxiliary beam through a pultrusion process, wherein the spanwise section of the second section is a straight surface; and the first segment and the second segment are spliced together in the spanwise direction to form the trailing edge auxiliary beam. According to the forming method of the trailing edge auxiliary beam, the bearing performance of the trailing edge auxiliary beam can be improved, the weight of the blade is reduced, and the error-tolerant rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a forming method of a trailing edge auxiliary beam, a trailing edge auxiliary beam, a blade and a wind power generator set. Background Art

[0002] The wind turbine blade is the main structure of the wind turbine generator set. The wind turbine blade includes a shell forming the basic airfoil of the wind turbine blade, a main beam and a trailing edge auxiliary beam sandwiched in the shell, and a web supporting the main beam.

[0003] The trailing edge auxiliary beam and the main beam together constitute the main load-bearing structure of the blade, providing the blade with anti-bending and anti-torsion capabilities. The trailing edge auxiliary beam is set close to the trailing edge of the blade, and its shape is relatively complex, with a certain curvature in both the span and chord directions.

[0004] The trailing edge auxiliary beam can be formed together with the half shell during the half shell molding of the blade or can be made into a prefabricated part. Since the shape of the trailing edge auxiliary beam is relatively special and has a certain curvature in both the chord direction and the span direction, whether the trailing edge auxiliary beam is formed into a prefabricated part or not, it is generally formed by vacuum infusion of resin after laying the fiber fabric layer.

[0005] However, when vacuum infusion resin molding is used, the load-bearing performance of the trailing edge auxiliary beam is low, the weight of the blade is increased, and the fault tolerance rate is low. Summary of the invention

[0006] An object of the present invention is to provide a method for forming a trailing edge auxiliary beam, a trailing edge auxiliary beam, a blade and a wind turbine generator set, which can improve the load-bearing performance of the trailing edge auxiliary beam, reduce the weight of the blade and improve the fault tolerance rate.

[0007] Another object of the present invention is to provide a method for forming a trailing edge auxiliary beam, a trailing edge auxiliary beam, a blade and a wind turbine generator set that can improve production efficiency.

[0008] Another object of the present invention is to provide a method for forming a trailing edge auxiliary beam, a trailing edge auxiliary beam, a blade and a wind turbine generator set, which can improve the segmented bonding strength of the trailing edge auxiliary beam.

[0009] Another object of the present invention is to provide a method for forming a trailing edge auxiliary beam, a trailing edge auxiliary beam, a blade and a wind turbine generator set, which can improve the bonding strength between the trailing edge auxiliary beam and an adjacent structure.

[0010] According to one aspect of the present invention, a method for forming a trailing edge auxiliary beam of a blade is provided, the forming method comprising: forming a first segment of the trailing edge auxiliary beam by a pultrusion process, the span-wise cross-section of the first segment being an arc surface; forming a second segment of the trailing edge auxiliary beam by a pultrusion process, the span-wise cross-section of the second segment being a straight surface; splicing the first segment and the second segment together along the span-wise direction to form the trailing edge auxiliary beam.

[0011] Optionally, the step of splicing the first segment and the second segment together along the span direction to form the trailing edge auxiliary beam includes: joining the joint surfaces of the first segment and the second segment together; and forming an upper reinforcement structure and a lower reinforcement structure covering the joint area on the upper surface and the lower surface of the joint area between the first segment and the second segment, respectively.

[0012] Optionally, the step of joining the joint surfaces of the first segment and the second segment together includes: forming an inclined first joint surface on the first segment, forming an inclined second joint surface on the second segment; and gluing the first joint surface and the second joint surface together.

[0013] Optionally, the steps of forming an upper reinforcement structure and a lower reinforcement structure on the upper surface and the lower surface of the joint area between the first segment and the second segment respectively include: laying a reinforcement cloth impregnated with resin on the upper surface and the lower surface of the joint area between the first segment and the second segment respectively and curing the resin.

[0014] Optionally, each of the upper reinforcement structure and the lower reinforcement structure comprises multiple layers of reinforcement cloth, and the edges of the multiple layers of reinforcement cloth are arranged in staggered layers.

[0015] Optionally, two ends in the chord direction of each of the first segment and the second segment form an inclined surface that inclines from bottom to top toward the chord direction center.

[0016] Optionally, the first segment and the second segment include resin and reinforcing fibers.

[0017] Optionally, in the steps of forming the first segment of the trailing edge auxiliary beam by pultrusion and forming the second segment of the trailing edge auxiliary beam by pultrusion, pre-curing is performed at a temperature of 140°C-180°C, and post-curing is performed at a temperature of 140°C-200°C.

[0018] According to another aspect of the present invention, there is provided a trailing edge auxiliary beam of a blade, the trailing edge auxiliary beam comprising a first segment and a second segment spliced ​​together in the span direction, the span-wise cross-section of the first segment being an arc surface, the span-wise cross-section of the second segment being a straight surface, and the first segment and the second segment being pultruded plates.

[0019] Optionally, the first segment has an inclined first joint surface, the second segment has an inclined second joint surface, and the first joint surface and the second joint surface are glued together.

[0020] Optionally, the trailing edge auxiliary beam further includes an upper reinforcement structure and a lower reinforcement structure respectively arranged on the upper surface and the lower surface of the joining area of ​​the first segment and the second segment.

[0021] Optionally, each of the upper reinforcement structure and the lower reinforcement structure comprises multiple layers of reinforcement cloth and resin, and the edges of the multiple layers of reinforcement cloth are arranged in staggered layers.

[0022] According to another aspect of the present invention, there is provided a blade, comprising the trailing edge auxiliary beam as described above.

[0023] According to another aspect of the present invention, a wind turbine generator set is provided, wherein the wind turbine generator set comprises the blade as described above.

[0024] The method for forming the trailing edge auxiliary beam according to the present invention can improve the load-bearing performance of the trailing edge auxiliary beam, reduce the weight of the blade, and improve the fault tolerance rate.

[0025] The method for forming the rear edge auxiliary beam of the present invention can improve production efficiency.

[0026] According to the forming method of the rear edge auxiliary beam of the present invention, the segmented bonding strength of the rear edge auxiliary beam can be improved.

[0027] The forming method of the rear edge auxiliary beam according to the present invention can improve the bonding strength between the rear edge auxiliary beam and the adjacent structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings, in which:

[0029] Figure 1 is a schematic diagram of a blade according to an embodiment of the present invention, wherein a trailing edge auxiliary beam on one side is shown;

[0030] Figure 2 yes Figure 1 The chord-wise cross-section of the blade in FIG.

[0031] Figure 3 is a flow chart of a method for forming a trailing edge auxiliary beam according to an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of a span-wise cross section of a trailing edge auxiliary beam according to an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of a span-wise cross section of a trailing edge auxiliary beam according to another embodiment of the present invention;

[0034] Figure 6 is a schematic diagram of a chord-wise cross section of a trailing edge auxiliary beam according to an embodiment of the present invention;

[0035] Figure 7 is a schematic diagram of a pultrusion apparatus for forming a pultruded sheet;

[0036] Figure 8and Fig. 9 yes Figure 7 The main view;

[0037] Fig.10 is along Figure 7 Cross-sectional view taken along line AA.

[0038] Explanation of the symbols in the drawings: 100-blade, 110-shell, 120-main beam, 130-web, 140-trailing edge auxiliary beam, 141-first section, 141a-first joint surface, 142-second section, 142a-second joint surface, 143-upper reinforcement structure, 144-lower reinforcement structure, 1-threading plate, 2 and 3-cold mold, 4-molding mold, 4a and 4b-mold cavity. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] Figure 1 is a schematic diagram of a blade according to an embodiment of the present invention, wherein a trailing edge auxiliary beam on one side is shown; Figure 2 yes Figure 1 Chord-wise cross section of the blade in .

[0042] like Figure 1 and Figure 2 As shown, the blade 100 includes a shell 110 forming a basic airfoil of the blade, a main beam 120 and a trailing edge auxiliary beam 140 sandwiched in the shell 110, and a web 130 supporting the main beam 120. The main beam 120 and the trailing edge auxiliary beam 140 are arranged in the upper and lower shells of the shell 110. The trailing edge auxiliary beam 140 is arranged close to the trailing edge of the blade 100, and together with the main beam 120, constitutes the main load-bearing structure of the blade.

[0043] like Figure 1 and Figure 2 As shown, the trailing edge auxiliary beam 140 has certain curved surfaces in the span direction and the chord direction, and the shape is relatively complex. Figure 1As shown in FIG. 1 , the spanwise cross section of a section of the trailing edge auxiliary beam 140 close to the blade root is a curved surface, and the spanwise cross section of a section of the trailing edge auxiliary beam 140 close to the blade tip is a straight surface. Figure 2 As shown, the chord-wise section of the trailing edge auxiliary beam 140 also has a certain curvature. At present, the preform is generally formed by vacuum infusion resin after laying the fiber fabric layer or formed together when forming the half shell of the blade. However, the use of vacuum infusion resin molding has low load-bearing performance of the trailing edge auxiliary beam, increased blade weight and high fault tolerance.

[0044] The present invention provides a method for forming a trailing edge auxiliary beam that can improve the load-bearing performance of the trailing edge auxiliary beam, reduce the weight and fault tolerance of the blade. In the following, the span direction of the trailing edge auxiliary beam 140 corresponds to the span direction of the blade 100, and also corresponds to the length direction of the trailing edge auxiliary beam 140; the chord direction of the trailing edge auxiliary beam 140 corresponds to the chord direction of the blade 100, and also corresponds to the width direction of the trailing edge auxiliary beam 140. In addition, the span-wise cross section of the trailing edge auxiliary beam 140 is a cross section cut along the span direction, and the chord-wise cross section of the trailing edge auxiliary beam 140 is a cross section cut along the chord direction.

[0045] Forming method of rear edge auxiliary beam

[0046] Figure 3 is a flow chart of a method for forming a trailing edge auxiliary beam according to an embodiment of the present invention; Figure 4 is a schematic diagram of a span-wise cross section of a trailing edge auxiliary beam according to an embodiment of the present invention; Figure 5 is a schematic diagram of a span-wise cross section of a trailing edge auxiliary beam according to another embodiment of the present invention; Figure 6 Schematic diagram of a chord-wise cross section of a trailing edge auxiliary beam according to an embodiment of the present invention.

[0047] like Figure 3 As shown, the forming method of the trailing edge auxiliary beam of the blade according to an embodiment of the present invention may include: forming the first segment 141 of the trailing edge auxiliary beam 140 by a pultrusion process, and the span-wise cross-section of the first segment 141 is an arc surface (S1); forming the second segment 142 of the trailing edge auxiliary beam 140 by a pultrusion process, and the span-wise cross-section of the second segment 142 is a straight surface (S2); splicing the first segment 141 and the second segment 142 together along the span direction to form the trailing edge auxiliary beam 140 (S3).

[0048] According to an embodiment of the present invention, the trailing edge auxiliary beam 140 is divided in the span direction into a first segment 141 having an arc-shaped cross-section in the span direction and a second segment 142 having a straight cross-section in the span direction, and the first segment 141 and the second segment 142 are formed into a pultruded plate by a pultrusion process, and the first segment 141 and the second segment 142 are spliced ​​together.

[0049] That is, the trailing edge auxiliary beam 140 according to the embodiment of the present invention can be formed by joining two pultruded plates. According to the present invention, by using pultruded plates to form the trailing edge auxiliary beam, the load-bearing performance of the trailing edge auxiliary beam can be improved, the weight of the blade can be reduced, and the fault tolerance rate can be improved. The fiber and resin content in the pultruded plate is easy to control, and the fiber content is higher than the fiber content of vacuum infusion. The higher the fiber content, the better the mechanical properties or load-bearing state. In addition, since the fiber content in the pultruded plate is high, the resin content is low, and the mechanical properties are relatively excellent. The mechanical properties can be guaranteed by using less material, which is conducive to reducing the weight of the blade. In addition, if the trailing edge auxiliary beam is produced by vacuum infusing resin after all the layers are laid, when a defect occurs in a certain place, the trailing edge auxiliary beam will be scrapped as a whole. By splicing two pultruded plates to produce the trailing edge auxiliary beam, if a problem or defect occurs on a pultruded plate during the production process, this pultruded plate can be scrapped and replaced with a new pultruded plate, and the trailing edge auxiliary beam will not be scrapped as a whole. Therefore, by using pultruded plates to form the trailing edge auxiliary beam, the fault tolerance rate can be improved.

[0050] In addition, the present invention forms the trailing edge auxiliary beam 140 by joining two pultruded plates, which can improve production efficiency compared with the process of laying fiber cloth and pouring resin.

[0051] Hereinafter, each step in the method for forming the trailing edge auxiliary beam will be described in detail.

[0052] In step S1, the first segment 141 of the trailing edge auxiliary beam 140 may be formed by a pultrusion process, such as Figure 4 and Figure 5 As shown, the spanwise cross section of the first segment 141 is an arc surface. In step S2, the second segment 142 of the trailing edge auxiliary beam 140 is formed by a pultrusion process, as shown in FIG. Figure 4 and Figure 5 As shown, the spanwise cross section of the second segment 142 is a straight surface. It should be understood that there is no order between steps S1 and S2.

[0053] The first segment 141 corresponds to a segment of the trailing edge auxiliary beam 140 close to the blade root, and the second segment 142 corresponds to a segment of the trailing edge auxiliary beam 140 close to the blade tip. Both the first segment 141 and the second segment 142 can be formed by a pultrusion process. The first segment 141 and the second segment 142 may include reinforcing fibers and resins. As an example, the reinforcing fibers may include at least one of glass fibers, basalt fibers, aramid fibers, carbon fibers, and synthetic fibers. As an example, the first segment 141 and the second segment 142 may use thermosetting resins. However, the present invention is not limited thereto, and the first segment 141 and the second segment 142 may also use thermoplastic resins. The specific types of thermosetting resins and thermoplastic resins are not limited, as long as they are resins that can be applied to blades. For example, the thermosetting resin may be an epoxy resin, etc., and the thermoplastic resin may be polypropylene, etc.

[0054] In the present invention, the span-wise cross section of the first segment 141 is an arc surface, which means that the first segment 141 is generally in the shape of an arc plate when viewed from a cross-sectional view taken along the span direction. The bending angle of the arc surface is not specifically limited, but can be specifically determined according to the blade model. The span-wise cross section of the second segment 142 is a straight surface, which means that the second segment 142 is generally in the shape of a straight plate when viewed from a cross-sectional view taken along the span direction. The span-wise length of the first segment 141 and the span-wise length of the second segment 142 are not specifically limited, but can be specifically determined according to the blade model.

[0055] like Figure 6 As shown, both ends of each of the first segment 141 and the second segment 142 in the chord direction form an inclined surface that is inclined from bottom to top toward the chord center. Therefore, the chord-wise cross section of each of the first segment 141 and the second segment 142 may be substantially trapezoidal in shape. However, as described above, the chord-wise cross section of each of the first segment 141 and the second segment 142 may have a certain curvature as a whole.

[0056] Through Figures 7 to 10 The pultrusion equipment shown in FIG. 1 is used to form the first segment 141 and the second segment 142 . Figure 7 is a schematic diagram of a pultrusion apparatus for forming a pultruded sheet; Figure 8 and Fig. 9 yes Figure 7 The main view; Fig.10 is along Figure 7 Cross-sectional view taken along line AA.

[0057] like Figure 7 As shown, the pultrusion equipment may include, for example, a threading plate 1, cold molds 2 and 3, and a forming mold 4. After passing through the impregnation tank, the reinforcing fibers may sequentially pass through the threading plate 1 and cold molds 2 and 3 for glue extrusion, and then enter the forming mold 4 for forming. The specific structure of the pultrusion equipment is not limited, and any type of pultrusion equipment known in the art may be applied.

[0058] Figure 8 The shape of the longitudinal cross section of the mold cavity 4a of the molding mold 4 for forming the first segment 141 is shown. Fig. 9 The shape of the longitudinal cross section of the mold cavity 4 b for forming the second segment 142 is shown. Fig.10 The shapes of the width-direction cross sections of the mold cavities 4 a and 4 b of the molding mold 4 for forming the first segment 141 and the second segment 142 are shown.

[0059] like Figure 8 As shown, the mold cavity 4a of the molding mold 4 has a curved cross section in the longitudinal direction, so the mold cavity 4a can form a first segment 141 with a curved cross section in the span direction. Fig. 9As shown, the longitudinal cross section of the mold cavity 4a of the molding mold 4 is a straight surface, so the second segment 142 with a straight cross section in the span direction can be formed by the mold cavity 4b. Fig.10 As shown, the width direction cross-sections of the mold cavities 4a and 4b of the molding mold 4 are approximately trapezoidal in shape, so that the chord-wise cross-sections of the first segment 141 and the second segment 142 can both form an approximately trapezoidal shape, as shown in FIG. Figure 6 shown.

[0060] The specific pultrusion process of the first segment 141 and the second segment 142 according to the present invention is not particularly limited, and any pultrusion process known in the art that can produce pultruded plates of the first segment 141 and the second segment 142 can be applied. As an example, the first segment 141 and the second segment 142 can be pre-cured at a temperature of 140° C.-180° C., and post-cured at a temperature of 140° C.-200° C., and the pre-curing temperature and the post-curing temperature can be adjusted according to different resins.

[0061] In step S2, if Figure 4 and Figure 5 As shown, the first segment 141 and the second segment 142 are spliced ​​together along the span direction to form the trailing edge auxiliary beam 140 .

[0062] According to an embodiment of the present invention, the joint surfaces of the first segment 141 and the second segment 142 may be joined together. Figure 4 As shown, the first segment 141 and the second segment 142 can be butted together along the span direction and glued together using a bonding adhesive such as epoxy resin. Figure 5 As shown, an inclined first joint surface 141a may be formed on the first segment 141, and an inclined second joint surface 142a may be formed on the second segment 142, and the first joint surface 141a and the second joint surface 142a may be bonded together using an adhesive such as epoxy resin. By forming the inclined first joint surface 141a and the second joint surface 142a, the bonding area may be increased and the bonding strength may be improved.

[0063] The specific method of connecting the joint surfaces of the first segment 141 and the second segment 142 together is not limited, and a mechanical connection method such as riveting, bolting, etc. can also be used.

[0064] After the joint surfaces of the first segment 141 and the second segment 142 are joined together, an upper reinforcement structure 143 and a lower reinforcement structure 144 covering the joint area can be formed on the upper surface and the lower surface of the joint area of ​​the first segment 141 and the second segment 142, respectively. According to the present invention, by forming the reinforcement structure on the upper surface and the lower surface of the joint area, the segmented joint strength of the trailing edge auxiliary beam can be improved.

[0065] As an example, a reinforcing cloth impregnated with resin may be laid on the upper surface and the lower surface of the joint area between the first segment 141 and the second segment 142, and the resin may be cured. For example, a multi-layer reinforcing cloth impregnated with resin may be laid on the upper surface and the lower surface of the joint area between the first segment 141 and the second segment 142, respectively. The reinforcing cloth may be, for example, a glass fiber cloth, but the present invention is not limited thereto, and may also be a carbon fiber reinforcing cloth or any other type of reinforcing cloth. The resin may be, for example, an epoxy resin, but the present invention is not limited thereto.

[0066] According to an embodiment of the present invention, Figure 4 and Figure 5 As shown, the edges of the multiple layers of reinforcing cloth can be arranged in staggered layers. For example, in the thickness direction of the trailing edge auxiliary beam 140, the lengths of the multiple reinforcing cloths gradually decrease as they are away from the trailing edge auxiliary beam 140. According to the embodiment of the present invention, by arranging the edges of the multiple layers of reinforcing cloth in staggered layers, the upper reinforcing structure 143 and the lower reinforcing structure 144 can form two inclined side surfaces, thereby increasing the bonding force between the upper reinforcing structure 143 and the lower reinforcing structure 144 and the adjacent structures of the blade, that is, increasing the bonding force between the trailing edge auxiliary beam 140 and the adjacent structures of the blade.

[0067] In addition, although Figure 4 and Figure 5 In the embodiment, the upper reinforcing structure 143 and the lower reinforcing structure 144 each include three layers of reinforcing cloth, but the number of layers of the reinforcing cloth in the upper reinforcing structure 143 and the lower reinforcing structure 144 is not limited thereto, and may also be two layers, four layers or more layers. In addition, the number of layers of the reinforcing cloth in the upper reinforcing structure 143 and the lower reinforcing structure 144 may be the same or different, without being specifically limited.

[0068] Trailing edge beam

[0069] According to an embodiment of the present invention, a trailing edge auxiliary beam 140 may be provided. As described above, the trailing edge auxiliary beam 140 may include a first segment 141 and a second segment 142 spliced ​​together in the span direction, the span-wise cross section of the first segment 141 is an arc surface, the span-wise cross section of the second segment 142 is a straight surface, and both the first segment 141 and the second segment 142 are pultruded plates.

[0070] As an example, the first segment 141 has an inclined first joint surface 141a, the second segment 142 has an inclined second joint surface 142a, and the first joint surface 141a and the second joint surface 142a are glued together. As an example, the trailing edge auxiliary beam 140 also includes an upper reinforcement structure 143 and a lower reinforcement structure 144 respectively arranged on the upper surface and the lower surface of the joint area of ​​the first segment 141 and the second segment 142. As an example, each of the upper reinforcement structure 143 and the lower reinforcement structure 144 includes multiple layers of reinforcement cloth and resin, and the edges of the multiple layers of reinforcement cloth are staggered. The description of the structure of the trailing edge auxiliary beam 140 is the same as the corresponding description in the above-mentioned molding method of the trailing edge auxiliary beam 140, and for the sake of brevity, it is not described in detail here.

[0071] Blades and wind turbines

[0072] According to an embodiment of the present invention, a blade including the above-mentioned trailing edge auxiliary beam 140 can also be provided. The blade according to an embodiment of the present invention can have the following features: Figure 1 and Figure 2 For example, the blade 100 may include a shell 110 , a main beam 120 and a web 130 in addition to the trailing edge auxiliary beam 140 .

[0073] According to an embodiment of the present invention, a wind turbine generator set including the above blade may also be provided.

[0074] The method for forming the rear edge auxiliary beam according to the embodiment of the present invention can achieve beneficial technical effects not limited to the following description.

[0075] The method for forming the trailing edge auxiliary beam according to the present invention can improve the load-bearing performance of the trailing edge auxiliary beam, reduce the weight of the blade, and improve the fault tolerance rate.

[0076] The method for forming the rear edge auxiliary beam of the present invention can improve production efficiency.

[0077] According to the forming method of the rear edge auxiliary beam of the present invention, the segmented bonding strength of the rear edge auxiliary beam can be improved.

[0078] The forming method of the rear edge auxiliary beam according to the present invention can improve the bonding strength between the rear edge auxiliary beam and the adjacent structure.

[0079] While exemplary embodiments of the present invention have been described in detail with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the claims.

Claims

1. A method for forming a trailing edge auxiliary beam of a blade, characterized in that: The molding method comprises: The first segment (141) of the trailing edge auxiliary beam (140) is formed by a pultrusion process, wherein the spanwise cross section of the first segment (141) is an arc surface; The second segment (142) of the trailing edge auxiliary beam (140) is formed by a pultrusion process, wherein the spanwise cross section of the second segment (142) is a straight surface; The first segment (141) and the second segment (142) are spliced ​​together along the span direction to form the trailing edge auxiliary beam (140).

2. The molding method according to claim 1, characterized in that: The step of splicing the first segment (141) and the second segment (142) together along the span direction to form the trailing edge auxiliary beam (140) comprises: joining the joint surfaces of the first segment (141) and the second segment (142) together; and forming an upper reinforcement structure (143) and a lower reinforcement structure (144) covering the joint area on the upper surface and the lower surface of the joint area between the first segment (141) and the second segment (142), respectively.

3. The molding method according to claim 2, characterized in that: The step of joining the joint surfaces of the first segment (141) and the second segment (142) together comprises: forming an inclined first joint surface (141a) on the first segment (141), and forming an inclined second joint surface (142a) on the second segment (142); and gluing the first joint surface (141a) and the second joint surface (142a) together.

4. The molding method according to claim 2, characterized in that: The steps of forming an upper reinforcement structure (143) and a lower reinforcement structure (144) respectively on the upper surface and the lower surface of the joining area between the first segment (141) and the second segment (142) include: laying a reinforcement cloth impregnated with resin on the upper surface and the lower surface of the joining area between the first segment (141) and the second segment (142) respectively and curing the resin.

5. The molding method according to claim 4, characterized in that: Each of the upper reinforcement structure (143) and the lower reinforcement structure (144) comprises multiple layers of reinforcement cloth, and the edges of the multiple layers of reinforcement cloth are arranged in staggered layers.

6. The molding method according to claim 1, characterized in that: Both ends of each of the first segment (141) and the second segment (142) in the chord direction form an inclined surface that inclines from bottom to top toward the chord center.

7. The molding method according to claim 1, characterized in that: The first segment (141) and the second segment (142) include resin and reinforcing fibers.

8. The molding method according to claim 1, characterized in that: In the steps of forming the first segment (141) of the trailing edge auxiliary beam (140) by a pultrusion process and forming the second segment (142) of the trailing edge auxiliary beam (140) by a pultrusion process, pre-curing is performed at a temperature of 140°C-180°C, and post-curing is performed at a temperature of 140°C-200°C.

9. A trailing edge auxiliary beam of a blade, characterized in that: The trailing edge auxiliary beam (140) comprises a first segment (141) and a second segment (142) spliced ​​together in the span direction, the span-wise cross section of the first segment (141) is an arc surface, the span-wise cross section of the second segment (142) is a straight surface, and the first segment (141) and the second segment (142) are both pultruded plates.

10. The trailing edge auxiliary beam according to claim 9, characterized in that: The first segment (141) has an inclined first joint surface (141a), and the second segment (142) has an inclined second joint surface (142a), and the first joint surface (141a) and the second joint surface (142a) are glued together.

11. The trailing edge auxiliary beam according to claim 9, characterized in that: The trailing edge auxiliary beam (140) further comprises an upper reinforcement structure (143) and a lower reinforcement structure (144) respectively arranged on the upper surface and the lower surface of the joint area of ​​the first segment (141) and the second segment (142).

12. The trailing edge auxiliary beam according to claim 11, characterized in that: Each of the upper reinforcing structure (143) and the lower reinforcing structure (144) comprises multiple layers of reinforcing cloth and resin, and the edges of the multiple layers of reinforcing cloth are arranged in staggered layers.

13. A blade, characterized in that: The blade comprises a trailing edge spar (140) according to any one of claims 9 to 12.

14. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the blade according to claim 13.

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