Wind power blade assembly and assembling method thereof

Abstract

The invention provides a wind power blade assembly and an assembling method thereof.The wind power blade assembly comprises a web arranged in a wind power blade and a lightning protection wire arranged on the web, the lightning protection wire comprises a plurality of linear sections and a plurality of bent sections, on the web, the linear sections are straightly fixed to the web, and the bent sections are arranged on the web. The plurality of linear sections and the plurality of bent sections are alternately arranged in the length direction of the web, and the bent sections can provide deformation allowance for deformation of the web in the length direction for the lightning conductor. By means of the technical scheme, according to the wind power blade assembly and the assembling method thereof, the multiple bent sections distributed on the web provide deformation allowance for the lightning conductor, so that the lightning conductor can adapt to deformation of the fan blade in the rotating process, and the situation that the lightning conductor is broken is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wind power generation, and in particular to a wind power blade assembly and an assembly method thereof. Background Art

[0002] Wind turbines are usually located at high altitudes, and their blades are easily struck by lightning. Therefore, lightning conductors are usually installed on the webs of wind turbine blades to protect the blades from damage by lightning. Wind turbine blades deform during rotation, and the deformation at the far end of the blade is greater than that at the root of the blade. This causes the lightning conductors installed on the webs to break or even rupture far away from the root of the blade, causing the lightning protection system to fail.

[0003] The existing patent document CN 214464693 U discloses a wind turbine blade lightning conductor fixing structure, which divides the blade web into several sections with a length of 1m, and each section is provided with two positioning blocks for the auxiliary lightning conductor to be laid straight, and a glass fiber cloth layer with a size of 100mm*200mm for fixing the lightning conductor. However, the fixing structure uses positioning blocks to lay the lightning conductor straight on the web, and under the deformation of the blade, the lightning conductor is still prone to breakage. Summary of the invention

[0004] A technical problem to be solved by the present disclosure is: how to prevent the lightning conductor from breaking during the rotation of the wind turbine blades. In order to solve the above-mentioned technical problems, an embodiment of the present disclosure provides a wind turbine blade assembly, including a web arranged in the wind turbine blade and a lightning conductor arranged on the web, the lightning conductor including a plurality of straight segments and a plurality of curved segments, wherein on the web, the straight segments are fixed straightly to the web, the plurality of straight segments and the plurality of curved segments are alternately arranged in the length direction of the web, and the curved segments can provide the lightning conductor with a deformation margin for deformation of the web along the length direction.

[0005] In some embodiments, on the web, a ratio of a wire length of the curved section to a distribution length of the curved section in a length direction of the web is 1.05-1.2.

[0006] In some embodiments, the lightning conductor includes a conductive core and an insulating sheath for wrapping the conductive core, and a plurality of cable ties tied to the outside of the insulating sheath are arranged at intervals on the lightning conductor.

[0007] In some embodiments, the web of the wind turbine blade includes a leading edge web and a trailing edge web that are arranged opposite to each other, and the lightning conductor is arranged on a side of the trailing edge web that faces away from the leading edge web.

[0008] In some embodiments, the straight section of the lightning conductor is fixed to the web by an adhesive tape bonded to the web.

[0009] In some embodiments, the lightning conductor further comprises a plurality of continuously arranged curved segments, one end of the plurality of continuously arranged curved segments being connected to the web and the other end being connected to the root of the wind turbine blade through the shell of the wind turbine blade.

[0010] In some embodiments, buckles for fixing the lightning protection wire to the housing are provided between two of the plurality of continuously arranged curved segments.

[0011] In some embodiments, an adhesive cloth is laid on the outer side of the buckle.

[0012] The present disclosure also provides an assembly method for a wind turbine blade assembly, comprising: S1, laying a lightning conductor on a web along its length direction; S2, dividing the lightning conductor into alternating straight segments and curved segments along the length direction of the web; S3, fixing the straight segments to the web.

[0013] In some embodiments, the lightning conductor includes a conductive core and an insulating sheath for wrapping the conductive core, and a plurality of cable ties tied to the outside of the insulating sheath are arranged at intervals on the lightning conductor; in S1, before laying the lightning conductor, the plurality of cable ties are tied to the outside of the insulating sheath at intervals.

[0014] Through the above technical solution, the wind turbine blade assembly and assembly method thereof provided by the present invention provide deformation margin for the lightning conductor through multiple curved sections distributed on the web, so that the lightning conductor can adapt to the deformation of the wind turbine blade during rotation, thereby avoiding the breakage of the lightning conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the structure after omitting the wind turbine blade shell according to the embodiment of the present disclosure; Figure 2 It is a schematic diagram of the partial structure after omitting the wind turbine blade shell according to the embodiment of the present disclosure; Figure 3 is a schematic cross-sectional view of a wind turbine blade disclosed in an embodiment of the present disclosure; Figure 4 is a schematic cross-sectional view of a lightning protection wire disclosed in an embodiment of the present disclosure; Figure 5 is an exemplary diagram of a curved segment disclosed in an embodiment of the present disclosure; Figure 6It is a schematic diagram of the structure of the buckle and adhesive cloth disclosed in the embodiment of the present disclosure; Figure 7 is a cross-sectional schematic diagram of a buckle and a lightning conductor disclosed in an embodiment of the present disclosure; Figure 8 It is a structural schematic diagram of the connection between the lightning protection wire and the flange disclosed in the embodiment of the present disclosure.

[0017] Description of reference numerals: 1. Lightning conductor; 101. Straight section; 102. Curved section; 103. Conductive core; 104. Insulating sheath; 105. Transition section; 2. Wind turbine blade; 201. Web; 2011. Leading edge web; 2012. Trailing edge web; 202. Shell; 2021. Windward side; 2022. Leeward side; 203. Blade leading edge; 204. Blade trailing edge; 205. Blade root baffle; 3. Cable tie; 4. Adhesive cloth; 5. Buckle; 6. Lightning recorder; 7. Lightning arrester; 8. Flange; 801. Connecting bolt; 802. Terminal block; 803. Connector. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0019] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0020] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0022] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0023] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0024] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0025] like Figure 1 and Figure 2 As shown, the present disclosure provides a wind turbine blade assembly, including a web 201 arranged in a wind turbine blade 2 and a lightning conductor 1 arranged on the web 201, the lightning conductor 1 including a plurality of straight segments 101 and a curved segment 102, wherein on the web 201, the straight segment 101 is fixed straightly to the web 201, the plurality of straight segments 101 and the plurality of curved segments 102 are alternately arranged in the length direction of the web 201, and the curved segment 102 can provide the lightning conductor 1 with a deformation margin for deformation of the web 201 along the length direction.

[0026] Specifically, the straight section 101 of the lightning conductor 1 extends along the length direction of the web 201, and the curved section 102 of the lightning conductor 1 is freely placed on the web 201 of the wind turbine blade 2, and both ends of each curved section 102 on the web 201 are connected to the straight section 101 fixed on the web 201, and the conductor length of the curved section 102 exceeds the distribution length of the curved section 102 along the length direction of the web 201, and the excess part is the deformation margin. During the operation of the wind turbine, the wind turbine blade 2 will be greatly deformed by the combined effect of its own gravity, wind force and rotational inertia. When the web 201 is deformed, the multiple curved sections 102 distributed along its length direction can move relative to the web 201 to adapt to the deformation, effectively reducing the influence of the deformation on the straight section 101 fixed on the web 201, and avoiding the partial breakage or overall breakage of the lightning conductor 1 under the deformation.

[0027] In some embodiments, the total length of all the curved segments 102 on the web 201 should account for 2%-10% of the length of the web 201. On the one hand, when there are too few curved segments 102, the deformation margin they can provide is insufficient and cannot effectively adapt to the deformation of the web 201. The lightning conductor 1 is prone to breakage during the deformation of the web 201. On the other hand, when there are too many curved segments 102, the straight segments 101 that can provide restraint for the lightning conductor 1 will be reduced accordingly, which is insufficient to provide sufficient centripetal force. The lightning conductor 1 is prone to slip toward the far end of the blade during the rotation of the wind turbine blade 2, affecting the lightning protection effect.

[0028] In some embodiments, Figure 1 As shown, the straight segments 101 and the curved segments 102 on the web 201 are evenly and alternately distributed, which makes it easier to prepare materials and install the lightning conductor 1 during the production of the wind turbine blade 2, and facilitates batch production. In other embodiments, according to conventional experience, the deformation amplitude of the distal end of the wind turbine blade 2 is usually greater than that of the root, and the straight segments 101 and the curved segments 102 can be arranged in an uneven distribution. Specifically, the single length and / or distribution density of the curved segments 102 can be arranged in a manner that the distal end of the blade is greater than the root of the blade, so as to better adapt to the deformation of the wind turbine blade 2.

[0029] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, on the web 201 , the ratio of the wire length of the curved segment 102 to the distribution length of the curved segment 102 in the length direction of the web 201 is 1.05-1.2.

[0030] Specifically, in each curved section 102, the amount by which the conductor length exceeds its distribution length is the deformation margin, and the arrangement of each curved section 102 is achieved by canceling the constraint of the straight section 101 in the distribution length in exchange for the deformation margin. When the deformation margin in a single curved section 102 is too small, in order to make the lightning conductor 1 have sufficient deformation margin, more straight sections 101 need to be replaced by curved sections 102, which will lead to a reduction in the straight sections 101 that can provide constraint force for the lightning conductor 1, and the straight sections 101 are insufficient to provide sufficient centripetal force. The lightning conductor 1 is prone to slip toward the far end of the blade during the rotation of the wind turbine blade 2, affecting the lightning protection effect. When the deformation margin in a single curved section 102 is too large, since the curved section 102 is freely arranged on the web 201, the lightning conductor 1 is prone to excessive bending in the process of following the deformation of the web 201, so that the local bending radius of the lightning conductor 1 is less than the specified minimum bending radius, causing damage to the internal structure of the lightning conductor 1 and affecting its conductive performance.

[0031] like Figure 4 As shown, in some embodiments, the lightning conductor 1 includes a conductive core 103 and an insulating sheath 104 for wrapping the conductive core 103 , and a plurality of cable ties 3 tied to the outside of the insulating sheath 104 are arranged at intervals on the lightning conductor 1 .

[0032] Specifically, when the lightning conductor 1 is just shipped, its insulating sheath 104 is wrapped around the conductive core 103, and there is an adhesive force between the two to prevent relative displacement between the conductive core 103 and the insulating sheath 104. After the lightning conductor 1 is installed on the wind turbine blade 2, under the repeated deformation of the wind turbine blade 2, since the elastic modulus of the insulating sheath 104 is usually much smaller than the conductive core 103 made of metal material, relative displacement will occur repeatedly between the two, causing the failure of the adhesive force between the insulating sheath 104 and the conductive core 103, and a channel for the conductive core 103 to move freely appears inside the lightning conductor 1. The conductive core 103 is more likely to break in the absence of external constraints. In actual applications, after the lightning conductor 1 without the cable tie 3 is broken, a large relative displacement has occurred between the conductive core 103 inside and the insulating sheath 104 outside, making it difficult to locate the breakpoint and increase the difficulty of repair. By arranging cable ties 3 at intervals on the lightning conductor 1, the insulating outer skin 104 and the conductive core 103 are tied tightly, thereby enhancing the integrity of the insulating outer skin 104 and the conductive core 103, effectively reducing the possibility of relative displacement between the two under repeated deformation, thereby causing the conductive core 103 to break, and also reducing the difficulty of breakpoint positioning and subsequent repair operations.

[0033] like Figure 3As shown, in some embodiments, the web 201 of the wind turbine blade 2 includes a leading edge web 2011 and a trailing edge web 2012 that are arranged opposite to each other, and the lightning conductor 1 is arranged on the side of the trailing edge web 2012 facing away from the leading edge web 2011 .

[0034] Specifically, in order to meet its own load resistance requirements, a double web structure of a leading edge web 2011 and a trailing edge web 2012 is usually adopted inside a large blade. In the existing arrangement of the lightning conductor 1, for the convenience of installation, the lightning conductor 1 is arranged on the side of the trailing edge web 2012 facing the leading edge web 2011. When the lightning conductor 1 breaks, due to the insufficient distance between the two webs, it is inconvenient for the staff to move between the two webs when performing maintenance, and the maintenance efficiency is low. The lightning conductor 1 is arranged on the side of the trailing edge web 2012 facing away from the leading edge web 2011, which is convenient for the staff to perform maintenance on the lightning conductor 1 later.

[0035] like Figure 1 and Figure 2 As shown, in some embodiments, the straight section 101 of the lightning conductor 1 is fixed to the web 201 by an adhesive cloth 4 engaged on the web 201 .

[0036] Specifically, compared with the integral injection molding fixation method commonly used in the industry, the use of adhesive cloth 4 for manual operation can more flexibly adjust the distribution length and distribution position of the curved section 102 of the lightning conductor 1. If the integral injection molding method is used, the mold used for injection molding needs to be frequently replaced, resulting in a significant increase in production costs. The use of adhesive cloth 4 can more flexibly produce wind turbine blades 2 that adapt to different working conditions, and the use of adhesive cloth 4 for manual operation can effectively reduce bubbles in the solidified layer and enhance the fixing effect.

[0037] In some embodiments, the adhesive cloth 4 can be used to fix the straight segment 101 by hand-pasting glass fiber cloth. Compared with the one-piece infusion molding fixation method, the glass fiber reinforced plastic used for infusion needs to be fixed at a curing temperature of 70-80°C. After the infusion is completed and the room temperature is restored, due to the temperature change, a gap will appear between the lightning conductor 1 and the curing layer wrapped on its surface, affecting the fixing effect. When the glass fiber cloth is hand-pasted, the working temperature is maintained between 18-40°C when the glass fiber cloth is manually laid, and then kept at room temperature for curing. While ensuring the curing strength, the influence of the temperature difference after curing on the fixing effect is avoided.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments, the lightning conductor 1 further includes a plurality of continuously arranged curved segments 102 , one end of the plurality of continuously arranged curved segments 102 is connected to the web 201 , and the other end is connected to the root of the wind turbine blade 2 through the shell 202 of the wind turbine blade 2 .

[0039] Specifically, the root of the web 201 is connected to the blade root baffle 205, and the wind turbine blade 2 is connected to the flange 8 inside the unit as a whole, and the blade root baffle 205 is provided between the flange 8 and the web 201. The root of the web 201 close to the flange 8 is affected by the operation of the wind turbine unit, and at the same time, this part is less affected by the wind force and the rotational inertia force, and will vibrate with small amplitude and high frequency, which is different from the reciprocating motion with large amplitude and low frequency occurring at other positions of the web 201.

[0040] Therefore, when installing the lightning conductor, the position of the web 201 10-20m away from the flange 8 is set as the starting point, and the lightning conductor 1 between the flange 8 and the blade root baffle 205 is bent and arranged inside the unit. Between the blade root baffle 205 and the starting point, a plurality of continuous curved sections 102 are arranged on the shell 202 to adapt to the vibration of the root of the web 201. From the starting point to the far end of the web 201, the straight sections 101 and the curved sections 102 are arranged alternately to adapt to the reciprocating motion with large amplitude and low frequency. Differentiating the layout according to the deformation type can enable the lightning conductor 1 installed on the wind turbine blade 2 to better adapt to the deformation occurring during operation.

[0041] In some embodiments, the shell 202 of the wind turbine blade 2 includes a windward surface 2021 and a leeward surface 2022. The lightning conductor 1 is arranged on the leeward surface 2022 of the shell 202 and is connected to the flange 8 through the blade root baffle 205 to reduce the external influence on the lightning conductor 1 at the blade root position. The lightning conductor 1 is transformed from the web 201 to the shell 202, and is provided with a curved transition section 105. The conductor in the transition section 105 is laid along a curve. To facilitate the curved laying, the transition section 105 may include a fixed section and a free laying section using an adhesive cloth 4, and the deflection angle thereof needs to be greater than 135° to avoid damage to the internal structure of the lightning conductor 1 and affect the lightning protection capability of the equipment.

[0042] like Figure 2 , Figure 6 and Figure 7 As shown, in some embodiments, buckles 5 for fixing the lightning conductor 1 to the housing 202 are provided between two of the plurality of continuously arranged curved segments 102. Specifically, the buckles 5 provided between two curved segments 102 can effectively fix the lightning conductor 1 to the housing 202 of the wind turbine blade 2 with a smaller fixing area, thereby reducing the influence of the fixed position under the vibration of the root of the web 201. In other embodiments, the lightning conductor 1 can also be fixed to the housing 202 by partial gluing.

[0043] like Figure 6As shown, in some embodiments, an adhesive cloth 4 is laid on the outside of the buckle 5, which can strengthen the fixing effect of the buckle 5 on the lightning conductor 1 on the one hand, and protect the buckle 5 on the other hand, reduce the impact of the external environment on the buckle 5, and can be strengthened by using multiple layers of adhesive cloth 4. Among them, the adhesive cloth 4 is preferably glass fiber cloth, and can also be insulating tape.

[0044] like Figure 1 and Figure 2 As shown, in some embodiments, the lightning conductor 1 is connected to a lightning recorder 6 at the root of the wind turbine blade 2. Specifically, the lightning recorder 6 is arranged in series on the lightning conductor 1 to accurately record the peak value, time, and number of lightning currents passing through the wind turbine blade 2. When abnormal damage occurs to the equipment, analysis can be performed based on the recorded data, which is convenient for the staff to find the cause of the accident.

[0045] like Figure 1 As shown, in some embodiments, the lightning conductor 1 is connected to a lightning receptor 7 at a position located at the far end of the wind turbine blade 2. Specifically, the lightning receptor 7 is arranged at the far end of the wind turbine blade 2 and is connected in series with the lightning conductor 1 to receive direct lightning discharge and effectively protect other parts of the wind turbine from lightning strikes.

[0046] like Figure 8 As shown, in some embodiments, one end of the lightning conductor 1 is connected to the connecting bolt 801 of the flange 8 through the terminal 802, and the connecting bolt 801 is movably arranged on the connecting piece 803 fixed on the flange 8, so as to facilitate the maintenance and replacement of the device.

[0047] The present disclosure also provides an assembly method for a wind turbine blade assembly, comprising: S1, laying a lightning conductor 1 on a web 201 along its length direction; S2, dividing the lightning conductor 1 into alternating straight segments 101 and curved segments 102 along the length direction of the web 201; S3, fixing the straight segment 101 to the web 201.

[0048] In some embodiments, the lightning conductor 1 includes a conductive core 103 and an insulating sheath 104 for wrapping the conductive core 103 , and a plurality of cable ties 3 tied to the outside of the insulating sheath 104 are arranged at intervals on the lightning conductor 1 ; in S1 , before laying the lightning conductor 1 , a plurality of cable ties 3 are tied to the outside of the insulating sheath 104 at intervals.

[0049] Taking a large wind turbine blade with a web 201 length of 95m as an example, the wind turbine blade assembly is described, wherein the conductive core 103 of the lightning conductor 1 is made of tinned copper or aluminum alloy and meets the requirements of IEC61400-24 specification, and the cross-sectional area of ​​the conductive core 103 is not less than 70 square millimeters; the following hand-layup resin model is SW 2513-A / SW 2513-BF, and the mass ratio is 100:28~100:32; the following adhesive model is WD3135S / WD3134S, and the mass ratio is 100:42~100:48; the adhesive cloth 4 is made of glass fiber cloth; the clip 5 is a U-shaped pipe clamp, model is DN20 (matching arc pressure plate, nut), the implementation standard is JB / ZQ4519-97, and the pipe clamp thread length is not less than 40mm; the end face of the flange 8 is taken as the reference point, set to L0m, and the starting point on the web 201 is set at L15m. The specific steps are as follows: ①. Divide the installation area of ​​the lightning conductor 1 on the wind turbine blade 2: 1) The lightning conductor 1 from L0m to the blade root baffle 205 is bent and arranged inside the wind turbine; 2) The lightning conductor 1 from the blade root baffle 205 to the starting point L15m is continuously laid with 6-8 curved sections 102 on the leeward side 2022 of the shell 202; 3) The lightning conductor 1 from L15m to the far end of the web 201 is arranged on the axis of the trailing edge web 2012 toward the trailing edge 204 of the blade. Except for the ranges of L25m-L25.5m, L40m-L40.5m, L55m-L55.5m, L70m-L70.5m, and L85m-L85.5m which are set as the curved section 102 and the branch points of the lightning conductor 1 (such as between the straight section 101 and the transition section 105, and between the lightning conductor 1 and the lightning receptor 7), the rest of the ranges are set as the straight section 101.

[0050] The setting requirements of the curved section 102 are shown in Figure 5 (Length: 700~750mm, width: 180~200mm).

[0051] ②, fix the lightning conductor 1 on the web 201 through hand-molded glass fiber reinforced plastics, the specific steps are as follows: 1) After the web 201 is cast, place the rear edge web 2012 where the lightning conductor 1 is to be installed on the designated tooling, clean the side of the lightning conductor 1 to ensure that the surface is a clean fiberglass rough surface for a firm connection; 2) Lay the lightning conductor 1 on the web 201 from the root to the distal end along the axis according to the setting method of S1. Before laying, tie a tie 3 every 2m. After tying, cut off the excess part of the tie 3. Do not tie the bending section 102 and the above-mentioned branch point. During the operation, ensure that the lightning conductor 1 is intact and the surface is clean; 3) Cutting fiberglass cloth. The fiberglass cloth uses biaxial fiber cloth, with two layers in total, with widths of 150mm and 200mm respectively, and lengths of 11000mm. The cutting tolerance is 0~10mm; 4) The hand-layup resin adopts a special hand-layup system composed of epoxy resin main agent SW 2513-A and curing agent SW 2513-BF. Prepare the hand-layup resin according to the mixing ratio of epoxy resin main agent and curing agent. Test the mixing ratio of the hand-layup resin system and use it only after the ratio meets the requirements. Calculate the total amount of hand-layup resin to be prepared according to the glue content of glass fiber cloth of 35-45% (mass ratio); 5) Wetting of hand-laid fiberglass cloth. Spread the fiberglass cloth in the order of laying, lay it on a clean flat plate or vacuum bag film, use a brush or scraper to dip the hand-laid resin and apply it evenly layer by layer on the surface of the fiberglass cloth. After a certain size is applied, roll up the cloth layer for later use; 6) Laying of hand-laid fiberglass cloth. The working environment requires a relative humidity of ≤75% and a temperature between 18-40°C. After the working environment meets the requirements, cover the fiberglass cloth soaked in hand-laid resin over the lightning conductor 1 arranged on the web 201 in the order of cloth layers, except for the bending section 102 of the lightning conductor 1 and the above-mentioned branch point position, and use a scraper to press the cloth layer. The fiberglass cloth layer is firmly attached to the lightning conductor 1 and the fiberglass reinforced plastic on the surface of the web 201, without bubbles and wrinkles; when pressing, start from the lightning conductor 1 along the width direction of the fiberglass cloth. The hand-laid fiberglass cloth must be consistent with the center line of the lightning conductor 1. When laying in sections, the axial overlap width is 50mm~100mm; 7) Lay out the release cloth and fix the plastic tube. After the hand-laid fiberglass cloth is laid, place a layer of release cloth on the surface of the fiberglass cloth. The width of the release cloth is 300mm. The release cloth is smoothly placed on the fiberglass cloth, covering all the hand-laid fiberglass cloth areas and exceeding the fiberglass cloth area by 40~60mm; then use the Ω-shaped plastic tube to press and buckle it on the fiberglass cloth of the lightning conductor 1. The release cloth and plastic tube can be removed only after the hand-laid fiberglass cloth is completely cured; 8) Curing and requirements: Curing at room temperature for more than 4 hours, and check that the Shore hardness of the FRP surface is not less than 65HD.

[0052] ③. Fix the lightning conductor 1 located at the blade root baffle 205-starting point L15m to the inner surface of the leeward side 2022 of the shell 202 by combining U-shaped pipe clamps, adhesives and hand-laid glass fiber cloth. The specific steps are as follows: 1) After the blade is formed, the lightning conductor 1 at the position L15m is led out and connected to the end surface of the blade root baffle 205 according to the arrangement of the lightning conductor 1 in S1; 2) The lightning conductor 1 within the range of blade L15m to the end face of the blade root baffle 205 is set and fixed one by one along the inner surface of the leeward surface 2022 according to the requirements of the curved section 102. Before fixing, the fiberglass in the hand-paste area must be roughened with 80-grit sandpaper or an angle grinder to confirm that the surface of the lightning conductor 1 and the shell 202 at the corresponding position is intact and dust-free; 3) After the preparation work is completed, use a U-shaped pipe clamp to clamp and fix the lightning conductor 1 on the insulating outer sheath 104 at the fixed position of the lightning conductor 1, use a small amount of adhesive to transition around the U-shaped pipe clamp, and finally fix it with 3 layers of biaxial glass fiber cloth from large to small by hand paste. The biaxial glass fiber cloth is staggered by 50mm around, and the width of the glass fiber cloth is 200~300mm and the length is 300 mm~400mm. The curing conditions and hardness requirements are the same as S2.

[0053] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0054] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A wind turbine blade assembly, characterized in that: The invention comprises a web (201) arranged in a wind turbine blade (2) and a lightning conductor (1) arranged on the web (201), wherein the lightning conductor (1) comprises a plurality of straight segments (101) and a plurality of curved segments (102), wherein On the web (201), the straight segment (101) is fixed flatly to the web (201), a plurality of the straight segments (101) and a plurality of the curved segments (102) are alternately arranged in the length direction of the web (201), and the curved segments (102) can provide the lightning conductor (1) with a deformation margin for deformation of the web (201) along the length direction.

2. The wind turbine blade assembly according to claim 1, characterized in that: On the web (201), the ratio of the wire length of the curved section (102) to the distribution length of the curved section (102) in the length direction of the web (201) is 1.05-1.

2.

3. The wind turbine blade assembly according to claim 1, characterized in that: The lightning conductor (1) comprises a conductive core (103) and an insulating outer sheath (104) for wrapping the conductive core (103), and a plurality of tie bands (3) tied to the outside of the insulating outer sheath (104) are arranged at intervals on the lightning conductor (1).

4. The wind turbine blade assembly according to claim 1, characterized in that: The web (201) of the wind turbine blade (2) comprises a leading edge web (2011) and a trailing edge web (2012) arranged opposite to each other, and the lightning conductor (1) is arranged on a side of the trailing edge web (2012) facing away from the leading edge web (2011).

5. The wind turbine blade assembly according to claim 1, characterized in that: The straight section (101) of the lightning conductor (1) is fixed to the web (201) by means of an adhesive cloth (4) bonded to the web (201).

6. The wind turbine blade assembly according to claim 1, characterized in that: The lightning conductor (1) further comprises a plurality of continuously arranged curved sections (102), wherein one end of the plurality of continuously arranged curved sections (102) is connected to the web (201), and the other end is connected to the root of the wind turbine blade (2) through the shell (202) of the wind turbine blade (2).

7. The wind turbine blade assembly according to claim 6, characterized in that: Buckles (5) for fixing the lightning protection wire (1) to the housing (202) are provided between each of the plurality of continuously arranged curved sections (102).

8. The wind turbine blade assembly according to claim 7, characterized in that: The outer side of the buckle (5) is covered with an adhesive cloth (4).

9. A method for assembling a wind turbine blade assembly according to claim 1, characterized in that: include: S1, laying the lightning conductor (1) on the web (201) along its length direction; S2, dividing the lightning conductor (1) into straight segments (101) and curved segments (102) arranged alternately along the length direction of the web (201); S3. Fixing the straight line segment (101) to the web (201).

10. The method for assembling a wind turbine blade assembly according to claim 9, characterized in that: The lightning conductor (1) comprises a conductive core (103) and an insulating outer sheath (104) for wrapping the conductive core (103); a plurality of tie bands (3) tied to the outside of the insulating outer sheath (104) are arranged at intervals on the lightning conductor (1); In S1, before laying the lightning protection wire (1), a plurality of tie ties (3) are tied at intervals to the outside of the insulating outer sheath (104).

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