A wind turbine blade web lamination structure and lamination method

Abstract

The present invention discloses a wind turbine blade web ply structure and ply method, including a leading edge web and a trailing edge web divided sequentially from the blade root to the blade tip: a blade root ply area, a transition ply area and a blade tip ply area; wherein the multi-layer glass fiber cloths respectively laid on the lower left layer and the lower right layer of the blade root overlap each other chordwise, the multi-layer glass fiber cloths respectively laid on the upper left layer and the upper right layer of the blade root overlap each other chordwise, and the multi-layer glass fiber cloths on the lower left layer of the blade root and the glass fiber cloths on the lower layer of the blade tip overlap each other axially, and the multi-layer glass fiber cloths on the upper right layer of the blade root and the glass fiber cloths on the upper layer of the blade tip overlap each other axially. The present invention divides the web glass fiber cloth into several pieces by sewing in advance, and lays multiple layers of glass fiber cloth at one time; divides the web ply into zones, performs synchronous and bidirectional operations without interfering with each other; is easy to operate, reduces the web ply laying time, and improves the laying speed and quality.

Description

Technical Field

[0001] The present invention relates to the field of wind turbine blades, and in particular to a wind turbine blade web ply structure and a ply method. Background Art

[0002] With the continuous upgrading of technology, wind turbine blades are rapidly developing in the direction of large-scale, and blades of more than 90 meters have entered the mass production stage. Correspondingly, the webs of wind turbine blades are getting longer and longer, and the layer laying takes more and more time. The webs are generally designed as several layers of fiberglass cloth + core material + several layers of fiberglass cloth. Due to the width limitation, each layer of fiberglass cloth is made of several pieces of fiberglass cloth overlapped, especially for blades with large pre-bends, the fiberglass cloth pieces are more. Moreover, in the production process of the web, workers lay the web layer by layer from the root to the tip, and can only lay one layer before laying the next layer, which has low production efficiency and takes a long time.

[0003] In order to simplify the web laying process, improve laying efficiency, reduce the web occupying formwork time and avoid supply shortage, it is very necessary to design a reasonable web laying method. Summary of the invention

[0004] The purpose of the present invention is to provide a wind turbine blade web ply structure and ply method, which improve the plying speed and quality.

[0005] To achieve the above-mentioned purpose, the specific technical solution of a wind turbine blade web ply structure and ply method of the present invention is as follows:

[0006] A wind turbine blade web ply structure, comprising a leading edge web and a trailing edge web divided sequentially from the blade root to the blade tip:

[0007] The blade root layer area includes a blade root left lower layer located on the left side of the blade root lower layer, a blade root right lower layer located on the right side of the blade root lower layer, a blade root left upper layer located on the left side of the blade root upper layer, and a blade root right upper layer located on the right side of the blade root upper layer;

[0008] The transition layer area includes the outer reinforcement layer at the bottom layer, the inner reinforcement layer at the top layer, the axial overlap area between the lower left layer of the blade root and the lower layer of the blade tip, and the axial overlap area between the upper right layer of the blade root and the upper layer of the blade tip; and

[0009] The blade tip layer area includes a blade tip lower layer located at the blade tip lower layer and a blade tip upper layer located at the blade tip upper layer, wherein the blade tip upper layer is located above the blade tip lower layer;

[0010] Among them, the multi-layer glass fiber cloths laid on the lower left layer and the lower right layer of the blade root are overlapped chordwise, the multi-layer glass fiber cloths laid on the upper left layer and the upper right layer of the blade root are overlapped chordwise, and the multi-layer glass fiber cloths on the lower left layer of the blade root and the glass fiber cloth on the lower layer of the blade tip are overlapped axially, and the multi-layer glass fiber cloths on the upper right layer of the blade root and the glass fiber cloth on the upper layer of the blade tip are overlapped axially.

[0011] A laying method for a wind turbine blade web layer structure comprises the following steps:

[0012] The first step is to partition the web ply;

[0013] The second step is to sew multiple layers of fiberglass cloth together;

[0014] The third step is to clean the web mold, lay the lower auxiliary material, and lay the external reinforcement layer on the transition layer area;

[0015] The fourth step is to simultaneously lay multiple layers of glass fiber cloth in the lower layers of the blade root layer area and the blade tip layer area; wherein, the lower left part of the blade root layer area is laid first; and at the same time, the lower part of the blade tip layer area is laid first; and the glass fiber cloths of the blade root layer area and the blade tip layer area where the glass fiber cloths are laid are axially overlapped;

[0016] The fifth step is to lay the lower right part of the blade root layer area and lay the core material in the blade tip layer area;

[0017] Step 6: Continue to lay the core material in the blade root layer area, and lay the upper layer of glass fiber cloth in the blade tip layer area;

[0018] In the seventh step, the upper left side and upper right side of the blade root paving area are paved respectively;

[0019] The eighth step is to lay the inner reinforcement layer in the transition layer area and lay the upper auxiliary materials to complete the web layer laying process.

[0020] The advantages of the wind turbine blade web paving structure and paving method of the present invention are:

[0021] 1) By sewing in advance, the web glass fiber cloth is divided into several pieces, and multiple layers of glass fiber cloth can be laid at one time without laying them layer by layer;

[0022] 2) Dividing the web layer into zones can achieve synchronous and bidirectional operation without interference;

[0023] 3) It is easy to operate and can reduce the web layer laying time, thereby shortening the formwork time, improving the laying speed and quality, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the partitioning of the ply structure of the present invention at the leading edge web and the trailing edge web;

[0025] Figure 2 for Figure 1 Schematic diagram of the chord-wise cross section of the ply in the blade root ply area (A zone);

[0026] Figure 3 for Figure 1 Schematic diagram of the chord-wise cross section of the ply in the blade tip ply area (area B);

[0027] Figure 4 yes Figure 1 Schematic diagram of the axial cross-section of the ply in the transition ply region (zone C).

[0028] In the figure: 1. Blade belly plate mold; 2. Fiberglass cloth; 21. Lower left layer of blade root; 22. Lower right layer of blade root; 23. Upper right layer of blade root; 24. Upper left layer of blade root; 25. Lower layer of blade tip; 26. Upper layer of blade tip; 27. External reinforcement layer; 28. Internal reinforcement layer; 3. Core material; 4. Stitching line. DETAILED DESCRIPTION

[0029] In order to better understand the purpose, structure and function of the present invention, a wind turbine blade web ply structure and ply method of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0030] like Figures 1 to 4 As shown, it shows a wind turbine blade web layer structure and layer method of the present invention, especially for large wind turbine blade web layer layer, laying glass fiber cloth 2, core material 3 and various auxiliary materials on the blade web mold 1 (leading edge web mold and trailing edge web mold). The present invention lays multiple layers of sewn glass fiber cloth 2 and core material 3 in the web mold 1, and lays them in both directions in the axial direction at the same time, thereby improving the laying speed and quality.

[0031] Further, if Figure 1 As shown, the ply structure of the blade web (leading edge web and trailing edge web) of the present invention includes a root ply area (area A), a transition ply area (area C) and a tip ply area (area B) which are sequentially divided from the root to the tip, and the root ply area and the tip ply area are respectively arranged on both sides of the transition ply area. The partition in the present invention can be determined according to the web width, the glass fiber cloth width, the pre-bending degree and the operating habits, etc., and is not limited to being divided into three areas. The current common glass fiber cloth width is 1.27m, and this embodiment is partitioned based on this. In the embodiment of the present invention, the area with the required glass fiber cloth width of the web>1.2m is used as the root ply area, and the area with the width of ≤1.2m is used as the tip ply area.

[0032] Furthermore, this embodiment is illustrated by taking 4 layers of glass fiber cloth on the upper and lower sides of the core material as an example.

[0033] Further, if Figures 2 to 4 As shown, the width of the glass fiber cloth required for the blade root layer area (area A) of the leading edge web and the trailing edge web is greater than 1.2m. In this embodiment, the blade root layer area (area A) is only divided into a left part and a right part. If the size is wider, it can be divided into more parts. Specifically, the blade root layer area (area A) includes a blade root left lower layer 21 located on the left side of the blade root lower layer, a blade root right lower layer 22 located on the right side of the blade root lower layer, a blade root left upper layer 24 located on the left side of the blade root upper layer, and a blade root right upper layer 23 located on the right side of the blade root upper layer. The blade root left upper layer 24 is located on the upper part of the blade root left lower layer 21; the blade root right upper layer 23 is located on the upper part of the blade root right lower layer 22.

[0034] Furthermore, the lower left layer 21 and the lower right layer 22 of the blade root located at the lower layer of the blade root overlap in the chord direction, and the upper left layer 24 and the upper right layer 23 of the blade root located at the upper layer of the blade root overlap in the chord direction. The overlap seams of all adjacent layers of glass fiber cloth are staggered by at least 100 mm, and the overlap seams of any layers are staggered by at least 20 mm.

[0035] Among them, the core material 3 (PVC, PET and other materials can be selected) is arranged between the blade root left lower layer 21, the blade root right lower layer 22 and the blade root left upper layer 24, the blade root right upper layer 23. The multiple layers of sewn glass fiber cloth are laid on the blade root left lower layer 21, the blade root right lower layer 22, the blade root left upper layer 24, the blade root right upper layer 23 according to the above positions.

[0036] Furthermore, the width of the fiberglass cloth required for the blade tip ply area (area B) of the leading edge web and the trailing edge web is ≤1.2m, and the fiberglass cloth can be laid directly without overlapping. Specifically, the blade tip ply area (area B) includes a blade tip lower layer 25 located at the blade tip lower layer and a blade tip upper layer 26 located at the blade tip upper layer, the blade tip upper layer is located at the upper part of the blade tip lower layer, and a core material 3 (PVC, PET, etc.) is provided between the blade tip lower layer 25 and the blade tip upper layer 26. The multiple layers of fiberglass cloth sewn together are laid on the blade tip lower layer 25 and the blade tip upper layer 26 according to the above positions.

[0037] Furthermore, the transition layer area (area C) of the leading edge web and the trailing edge web is the transition area where the glass fiber cloth of the blade root layer area (area A) and the blade tip layer area (area B) are axially staggered and overlapped. In order to reinforce the transition layer area (area C), the transition layer area (area C) includes an outer reinforcement layer 27 located at the lower layer and an inner reinforcement layer 28 located at the upper layer. The two sides of the outer reinforcement layer 27 are respectively located at the bottom of the blade root lower layer 21 of the blade root layer area and the blade tip lower layer 25 of the blade tip layer area, and the two sides of the inner reinforcement layer 28 are respectively located at the top of the blade root upper layer 23 and the blade tip upper layer 26. The outer reinforcement layer 27 and the inner reinforcement layer 28 are 2 to 3 layers of glass fiber cloth, which extend beyond the overlap area by at least 0.2m in the axial direction and are the same width as the web in the chord direction.

[0038] In addition, the transition ply area (C area) of the leading edge web and the transition ply area (C area) of the trailing edge web are staggered in the axial direction and spaced a certain distance (preferably ≥1m) from each other to prevent the glass fiber cloth disconnection areas from overlapping in the axial direction and affecting the web quality.

[0039] Furthermore, in the transition layer area (area C), the glass fiber cloth layers of the blade root left lower layer 21 and blade tip lower layer 25, the blade root right upper layer 23 and blade tip upper layer 26 are overlapped in the axial direction, and the overlap width is 50-70mm. The overlap seams of all adjacent layers of glass fiber cloth are staggered by at least 100mm, the overlap seams of any layers are staggered by at least 20mm, and the overlap positions of the upper and lower core materials need to be staggered by at least 0.5m.

[0040] In addition, the upper right layer 23 of the blade root near the transition ply region (C region) is located on top of the upper layer 26 of the blade tip near the transition ply region (C region). And, the lower left layer 21 of the blade root near the transition ply region (C region) is located at the bottom of the lower layer 25 of the blade tip near the transition ply region (C region).

[0041] Furthermore, in order to facilitate rapid laying, the multi-layer glass fiber cloth in each area of ​​the present invention is pre-sewn together axially by the stitching line 4 before laying. Moreover, in the area of ​​the glass fiber cloth with a larger width in the chord direction, the lower left layer 21 of the blade root and the upper right layer 23 of the blade root are wide cloth layers, both of which are sewn with two stitching lines 4, and the multi-layer glass fiber cloth is sewn together by the two stitching lines 4, one of which is 100 to 200 mm away from the flange of the blade web mold 1, which is convenient for the subsequent adjustment of the flanged cloth layer, and the other stitching line 4 is 80 mm to 120 mm (preferably 100 mm) away from the edge of the narrowest glass fiber cloth (the narrowest layer among the multi-layer glass fiber cloth), so as to facilitate the subsequent staggered overlap and adjustment of the glass fiber cloth.

[0042] Among them, the lower right layer 22 of the blade root, the upper left layer 24 of the blade root, the lower layer 25 of the blade tip and the upper layer 26 of the blade tip are narrow cloth layers, and each of them is directly sewn with a stitching line 4. The stitching line 4 of the lower right layer 22 of the blade root and the upper left layer 24 of the blade root is 100 to 200 mm away from the flange of the blade web mold 1, so as to facilitate the subsequent adjustment of the flanged cloth layer. The stitching line 4 of the lower layer 25 of the blade tip and the upper layer 26 of the blade tip is set in the center, so that the fiberglass cloth can be directly sewn in the center. Figure 4 As shown, in the axial direction, the overlap positions of the blade root left lower layer 21 and the blade tip lower layer 25, the blade root right upper layer 23 and the blade tip upper layer 26 reserve 80 to 120 mm (preferably 100 mm) of unsewn stitching line 4 for adjusting the overlapping fabric layers. During the sewing process, attention should be paid to adjusting the flatness of the glass fiber cloth to prevent wrinkles from forming.

[0043] The present invention also discloses a laying method for a wind turbine blade web layer structure, comprising the following steps:

[0044] The first step is to partition the web ply.

[0045] According to the width of the glass fiber cloth required for the blade web, the blade web (leading edge web and trailing edge web) is divided into the blade root ply area (area A), the transition ply area (area C) and the blade tip ply area (area B) from the blade root to the blade tip.

[0046] The partition in the present invention is determined based on the web width, glass fiber cloth width, pre-bending degree and operating habits, and is not limited to three areas. The embodiment of the present invention is based on the currently commonly used glass fiber cloth with a width of 1.27m. The area with a web width of glass fiber cloth greater than 1.2m is used as the blade root laying area, and the area less than 1.2m is used as the blade tip laying area.

[0047] The second step is to sew multiple layers of fiberglass cloth together.

[0048] Specifically, the multiple layers of glass fiber cloth to be laid on the blade root left lower layer 21, blade root right lower layer 22, blade root right upper layer 23, blade root left upper layer 24, blade tip lower layer 25 and blade tip upper layer 26 are sewn together through the stitching line 4. When sewing, pay attention to adjusting the flatness of the glass fiber cloth to prevent wrinkles. After rolling, mark the glass fiber cloth layers.

[0049] The third step is to clean the mold and lay the outer reinforcement layer 27.

[0050] Specifically, after cleaning the blade web mold 1 (the leading edge web mold and the trailing edge web mold) and laying the required auxiliary materials, the outer reinforcement layer 27 is laid in the transition layer area (area C) corresponding to the blade web mold 1.

[0051] The fourth step is to simultaneously lay the lower layers of the blade root lamination area and the blade tip lamination area, wherein the left portion of the lower layer of the wider blade root lamination area is laid first; at the same time, the lower portion of the narrower blade tip lamination area is laid first; and the laid blade root lamination area and blade tip lamination area are axially overlapped.

[0052] Specifically, the glass fiber cloth is laid in the blade root layer area (area A) of the blade web (leading edge web and trailing edge web) from the root to the tip, that is, the sewn blade root lower left layer 21 is first laid on the lower left side of the blade root.

[0053] At the same time, the blade tip lower layer 25 (glass fiber cloth) sewn is laid on the lower side of the blade tip layup area (area B) from the tip to the root;

[0054] In the transition layer area (area C), adjust the axial overlap of the glass fiber cloth at the lower left layer 21 of the blade root and the lower layer 25 of the blade tip. The overlap width of each layer of glass fiber cloth is 50-70mm, the overlap seams of adjacent layers are staggered by at least 100mm, and the overlap seams of any layers are staggered by at least 20mm. Subsequent overlaps are performed according to this requirement.

[0055] In the fifth step, the right part of the lower layer is laid in the wider blade root laying area, and the core material 3 is laid in the blade tip laying area.

[0056] Specifically, the right side of the lower layer of the blade root layer area (area A) (i.e., the blade root right lower layer 22) is laid, and the sewn glass fiber cloth of the blade root right lower layer 22 is laid on the right lower side of the root of the web mold 1. Note that the glass fiber cloth of the blade root right lower layer 22 and the blade root left lower layer 21 overlap in the chord direction. At the same time, the core material 3 is laid in the blade tip layer area (area B).

[0057] Step 6: Continue laying the core material 3 and lay the upper layer in the narrow blade tip layer area.

[0058] Specifically, the core material 3 is laid on the blade root ply region (region A), and at the same time, the upper layer portion (ie, the blade tip upper layer 26) of the blade tip ply region (region B) is laid.

[0059] In the seventh step, the upper left and upper right parts of the blade root laying area are laid respectively.

[0060] Specifically, the upper left side of the blade root layer area (i.e., the blade root left upper layer 24) and the upper right part of the upper layer (blade root right upper layer 23) are laid, and attention is paid to the overlap between the two in the chord direction, as well as the overlap between the blade root right upper layer 23 and the blade tip upper layer 26 in the axial direction. The overlap position of the blade root right upper layer 23 and the blade tip upper layer 26 in the axial direction needs to be axially offset from the overlap position of the lower layers (root left lower layer 21 and blade tip lower layer 25) by at least 0.5m.

[0061] Finally, the inner reinforcement layer 28 is laid in the transition layer area (area C), and the upper auxiliary material is laid to complete the web layer laying process.

[0062] The outer reinforcement layer 27 and the inner reinforcement layer 28 are 2 to 3 layers of glass fiber cloth, which extend beyond the overlap area by at least 0.2 m in the axial direction and are the same width as the web in the chord direction.

[0063] The present invention provides a wind turbine blade web ply structure and ply method. The web glass fiber cloth is divided into several pieces by pre-sewing, so that multiple layers of glass fiber cloth can be laid at one time without laying them layer by layer. The web ply is divided into zones to achieve synchronous and two-way operation without mutual interference. The operation is simple and can reduce the web ply laying time, thereby shortening the mold occupying time, improving the laying speed and quality, and improving the production efficiency.

[0064] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A wind turbine blade web ply structure, characterized in that: Including the leading edge web and the trailing edge web divided from the root to the tip of the blade: The blade root layer area includes a blade root left lower layer (21) located on the left side of the blade root lower layer, a blade root right lower layer (22) located on the right side of the blade root lower layer, a blade root left upper layer (24) located on the left side of the blade root upper layer, and a blade root right upper layer (23) located on the right side of the blade root upper layer; The transition layer region includes an outer reinforcement layer (27) at the bottom layer, an inner reinforcement layer (28) at the top layer, an axial overlap region between the lower left layer (21) of the blade root and the lower layer (25) of the blade tip, and an axial overlap region between the upper right layer (23) of the blade root and the upper layer (26) of the blade tip; and The blade tip layer region includes a blade tip lower layer (25) located at the blade tip lower layer and a blade tip upper layer (26) located at the blade tip upper layer, wherein the blade tip upper layer is located above the blade tip lower layer; The multi-layer glass fiber cloths respectively laid on the lower left layer (21) and the lower right layer (22) of the blade root overlap each other chordwise, the multi-layer glass fiber cloths respectively laid on the upper left layer (24) and the upper right layer (23) of the blade root overlap each other chordwise, and the multi-layer glass fiber cloths of the lower left layer (21) of the blade root and the glass fiber cloths of the lower layer (25) of the blade tip overlap each other axially, and the multi-layer glass fiber cloths of the upper right layer (23) of the blade root and the glass fiber cloths of the upper layer (26) of the blade tip overlap each other axially.

2. The wind turbine blade web ply structure according to claim 1, characterized in that: The upper right layer (23) of the blade root near the transition layer area is located above the upper layer (26) of the blade tip near the transition layer area; the lower left layer (21) of the blade root near the transition layer area is located below the lower layer (25) of the blade tip near the transition layer area.

3. A method for laying a ply structure of a wind turbine blade web, characterized in that: The following steps are involved: The first step is to partition the web ply; The second step is to sew multiple layers of fiberglass cloth together; The third step is to clean the web mold, lay the lower auxiliary material, and lay the external reinforcement layer on the transition layer area; The fourth step is to simultaneously lay multiple layers of glass fiber cloth in the lower layers of the blade root layer area and the blade tip layer area; wherein, the lower left part of the blade root layer area is laid first; and at the same time, the lower part of the blade tip layer area is laid first; and the glass fiber cloths of the blade root layer area and the blade tip layer area where the glass fiber cloths are laid are axially overlapped; The fifth step is to lay more lower right part of the blade root layer area and lay the core material in the blade tip layer area; Step 6: Continue to lay the core material in the blade root layer area, and lay the upper layer of glass fiber cloth in the blade tip layer area; In the seventh step, the upper left side and upper right side of the blade root paving area are paved respectively; The eighth step is to lay the inner reinforcement layer in the transition layer area and lay the upper auxiliary materials to complete the web layer laying process.

4. The laying method according to claim 3, characterized in that: In the second step, the multiple layers of glass fiber cloth to be laid in the blade root ply area and the blade tip ply area are sewn together respectively by stitching lines (4).

5. The laying method according to claim 4, characterized in that: In the fourth step, the sewn glass fiber cloth is laid from the root to the tip in the blade root laying area of ​​the blade web mold, and the blade root left lower layer (21) in the blade root laying area is laid in the left part and the right part, and the blade root left lower layer (21) is laid first; in the blade tip laying area, the laying is carried out from the tip to the root, and the blade tip lower layer (25) is laid first.

6. The laying method according to claim 5, characterized in that: In the fifth step, the lower right layer (22) of the blade root in the blade root layer area is laid; and the core material (3) is laid in the blade tip layer area; in the sixth step, the core material (3) is laid on the blade root layer area, and the blade tip upper layer (26) of the blade tip layer area is laid; in the seventh step, the upper left layer (24) and the upper right layer (23) of the blade root in the blade root layer area are laid.

7. The laying method according to claim 4, characterized in that: The blade root right lower layer (22), the blade root left upper layer (24), the blade tip lower layer (25) and the blade tip upper layer (26) are narrow fabric layers, each of which is sewn with a stitching line (4); the blade root left lower layer (21) and the blade root right upper layer (23) are wide fabric layers, each of which is sewn with two stitching lines (4).

8. The laying method according to claim 7, characterized in that: The stitching lines (4) of the lower right layer (22) of the blade root and the upper left layer (24) of the blade root are 100 to 200 mm away from the flange of the blade web mold (1); the stitching lines (4) of the lower layer (25) of the blade tip and the upper layer (26) of the blade tip are arranged in the center.

9. The laying method according to claim 7, characterized in that: One of the two stitching lines (4) on the lower left layer (21) of the blade root and the upper right layer (23) of the blade root is 100 to 200 mm away from the flange of the blade web mold (1); the other stitching line (4) is 80 to 120 mm away from the edge of the narrow glass fiber cloth on the multi-layer glass fiber cloth.

10. The laying method according to claim 7, characterized in that: In the axial direction, an 80-120 mm unsewn stitching line (4) is reserved at the overlapping positions of the blade root left lower layer (21) and the blade tip lower layer (25), and the blade root right upper layer (23) and the blade tip upper layer (26).

Images