Preform fabric, glass fiber fabric compound and wind power blade

Abstract

The utility model provides a pre-shaped fabric, a glass fiber fabric compound and a wind power blade, and relates to the technical field of fiber products. The preset fabric comprises a fiber fabric and a plurality of resin structures, the fiber fabric comprises warp yarns, weft yarns and weaving yarns, the warp yarns and the weft yarns are oriented in different directions, and the weaving yarns bind the warp yarns and the weft yarns together; the multiple resin structures are arranged on the surface of the fiber fabric at intervals, each resin structure comprises at least two resin strips, the extending direction of one resin strip and the extending direction of the warp yarn form a first angle, the extending direction of the other resin strip and the extending direction of the weft yarn form a second angle, the first angle is 0-15 degrees, and / or the second angle is 0-15 degrees. And the second angle is 0-15 degrees. Therefore, the strength and the stiffness of the obtained product are improved, so that the risk of wrinkling is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fiber products, and in particular to a pre-shaped fabric, a glass fiber fabric composite and a wind turbine blade. Background Art

[0002] As countries pay more attention to the environment, the clean energy sector is showing a rapid development trend. As a new type of energy, clean energy has the advantages of wide distribution, renewable, and less environmental pollution compared to traditional fossil fuels. As a representative of clean energy, the application of wind turbines is growing. In addition, due to the restrictions on the flow of people due to force majeure in recent years, the advantages of power generation devices such as wind turbines that can operate for a long time without human operation have become increasingly prominent.

[0003] Wind turbine blades are one of the key core components of wind turbines. The quality of blade design, manufacturing and operating status directly affects the performance and power generation efficiency of the entire machine, and has a significant impact on the operating costs of wind farms. From the perspective of the value of components, the value of blades is extremely large, and its cost accounts for about 22.2% of the total cost of wind turbines. With the increase in the size of wind turbines and the development of offshore wind power, blades will become longer and longer and have higher blade tip linear speeds (up to 120 meters per second). In the future, the large-scale and lightweight development of wind turbine blades will become the main direction of blade development.

[0004] At present, wind turbine blades mainly use fiber fabrics as reinforcing materials. However, during the manufacturing process, since the fiber fabrics are relatively soft, the efficiency is affected during the movement and laying process, and it is also easy to cause wrinkles, thus affecting the stability of the quality of the wind turbine blades. Summary of the invention

[0005] The following is a summary of the subject matter of the detailed description of the present disclosure. This summary is not intended to limit the scope of the claims.

[0006] The present disclosure provides a pre-shaped fabric, a glass fiber fabric composite and a wind turbine blade.

[0007] According to some embodiments, a first aspect of the present disclosure provides a pre-shaped fabric, comprising: a fiber fabric and a plurality of resin structures, wherein the fiber fabric comprises warp yarns, weft yarns and braiding yarns, and the warp yarns and the weft yarns are oriented in different directions, and the braiding yarns bind the warp yarns and the weft yarns together;

[0008] A plurality of resin structures are arranged at intervals on the surface of the fiber fabric, and each of the resin structures includes at least two resin strips, wherein an extension direction of one of the resin strips forms a first angle with an extension direction of the warp yarn, and an extension direction of the other resin strip forms a second angle with an extension direction of the weft yarn, the first angle is 0°-15°, and / or the second angle is 0°-15°.

[0009] According to some embodiments of the present disclosure, the density of the plurality of resin structures gradually decreases in a direction from the edge of the fiber fabric to the center of the fiber fabric.

[0010] According to some embodiments of the present disclosure, the unit areas of the plurality of resin structures are the same or approximately the same, and the spacings between adjacent resin structures are equal.

[0011] According to some embodiments of the present disclosure, a unit area of ​​the plurality of resin structures gradually changes in a direction from an edge of the fiber fabric to a center of the fiber fabric.

[0012] According to some embodiments of the present disclosure, the warp yarns are arranged in parallel in the 0° direction, the weft yarns are arranged perpendicular to the warp yarns in the 90° direction, and the plurality of resin structures include at least one of a "convex" type and a "cross" type.

[0013] According to some embodiments of the present disclosure, the warp yarns are arranged in parallel in the 0° direction, the weft yarns intersect with the warp yarns in the ±(10-90°) directions, and the plurality of resin structures include rhombuses.

[0014] According to some embodiments of the present disclosure, the resin strip in the resin structure is at least one of an epoxy resin strip, a vinyl resin strip, a polyimide resin strip, and a phenolic resin strip.

[0015] According to some embodiments, a second aspect of the present disclosure provides a glass fiber fabric composite, comprising any of the above pre-shaped fabrics.

[0016] According to some embodiments, a third aspect of the present disclosure provides a wind turbine blade, comprising the pre-shaped fabric as described in any one of the above.

[0017] The present disclosure provides a pre-shaped fabric, a glass fiber fabric composite and a wind turbine blade. The resin structure is formed by resin strips arranged at preset angles in the extension direction of the warp and weft yarns of the fiber fabric. This not only enhances the strength of the fiber fabric, but also enhances the stiffness of the fiber fabric, thereby improving the production efficiency of the wind turbine blades and reducing the probability of wrinkle problems, thereby improving the stability of the wind turbine blades.

[0018] Other aspects will be apparent upon reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the embodiments of the present disclosure. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present disclosure, rather than all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic structural diagram of a pre-shaped fabric according to an exemplary embodiment.

[0021] Figure 2 FIG. 4 is a diagram showing the distribution of a plurality of resin structures on a pre-shaped fabric according to an exemplary embodiment.

[0022] Figure 3 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0023] Figure 4 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0024] Figure 5 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0025] Figure 6 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0026] Figure 7 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0027] Figure 8 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0028] Fig. 9 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0029] Fig.10 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0030] Fig.11 FIG. 4 is a diagram showing distribution of a plurality of resin structures on a pre-shaped fabric according to another exemplary embodiment.

[0031] Reference numerals:

[0032] 10-fiber fabric; 11-warp yarn; 12-weft yarn; 13-woven yarn; 20-resin structure; 21-first resin strip; 22-second resin strip; α-first angle; β-second angle; L1-first straight line; L2-second straight line. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure. It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other.

[0034] The embodiment of the present disclosure provides a pre-shaped fabric, which includes: a fiber fabric and a plurality of resin structures, wherein the fiber fabric includes warp yarns, weft yarns and braiding yarns, and the warp yarns and weft yarns are oriented in different directions, and the braiding yarns bind the warp yarns and weft yarns together; a plurality of resin structures are arranged at intervals on the surface of the fiber fabric, and each resin structure includes at least two resin strips, wherein the extension direction of one resin strip forms a first angle with the extension direction of the warp yarns, and the extension direction of the other resin strip forms a second angle with the extension direction of the weft yarns, the first angle is 0°-15°, and / or the second angle is 0°-15°. In this way, the plurality of resin structures increase the stiffness of the pre-shaped fabric, and the use of the pre-shaped fabric reduces the risk of wrinkle problems in the process of making wind turbine blades, thereby improving the quality stability of the wind turbine blades. At the same time, the plurality of resin strips constituting the resin structure are distributed at preset angles along the warp yarns and weft yarns of the fiber fabric, respectively, which reduces the difficulty of processing the pre-shaped fabric and enhances the strength of the pre-shaped fabric.

[0035] Combine the following Figure 1 The embodiments of the present disclosure are described, wherein: Figure 1 A schematic structural diagram of a pre-shaped fabric is provided.

[0036] The exemplary embodiment of the present disclosure provides a pre-shaped fabric, which includes a fiber fabric 10 and a plurality of resin structures 20, wherein the resin structures 20 are adhered to the fiber fabric 10. Figure 1As shown, the fiber fabric 10 includes 0° oriented warp yarns 11, i.e., a plurality of warp yarns 11 are arranged in parallel in the 0° direction, 90° oriented weft yarns 12, i.e., a plurality of weft yarns 12 are arranged perpendicular to the 0° oriented warp yarns 11 in the 90° direction, and a weaving yarn 13 that ties the 0° oriented warp yarns 11 and the 90° oriented weft yarns 12 together. Specifically, the weaving yarn 13 ties the 0° oriented warp yarns 11 and the 90° oriented weft yarns 12 together in a warp-plain manner. Figure 2 As shown, the resin structure 20 includes a first resin strip 21 and a second resin strip 22. The first resin strip 21 extends in a direction at a first angle α, such as 0°, to the 0° oriented warp yarn 11, and the second resin strip 22 extends in a direction at a second angle β, such as 0°, to the 90° oriented weft yarn 12. The pattern formed by the first resin strip 21 and the second resin strip 22 can be, for example, as shown in FIG. Figure 1 The "convex" type shown.

[0037] In at least one embodiment, the design of the fiber fabric 10 in the pre-shaped fabric can refer to the above embodiment. Figure 1 The corresponding fiber fabric 10 is not described in detail here. Figure 3 As shown, the first resin strip 21 of the plurality of resin structures 20 in the predetermined fabric extends in a direction at a first angle α, for example, 15°, to the warp yarn 11 oriented at 0°, and the second resin strip 22 extends in a direction at a second angle β, for example, 15°, to the weft yarn 12 oriented at 90°, and the pattern formed by the first resin strip 21 and the second resin strip 22 is similar to a "convex" shape. There is a gap between the two parts of the "convex" shape, that is, the first resin strip 21 and the second resin strip 22 are not in contact, forming a gap, so that the strength and stiffness of the predetermined fabric are improved while reducing the difficulty of preparing the "convex"-shaped resin structure 20.

[0038] It should be understood that the specific structure of the predetermined fabric is not limited to the structure shown in the above embodiment. For example, the fiber fabric 10 in the predetermined fabric can be any one of all packaged fabrics such as uniaxial fabric, biaxial fabric, triaxial fabric, quadraaxial fabric, etc.; for example, the braiding yarn 13 can also be used to weave the warp yarn 11 and the weft yarn into one by a warp flat chain method; for another example, the first angle α between the first resin strip 21 and the 0° oriented warp yarn 11 can include 0° in addition to 0° and 15°. ° to 15 °, such as 1 °, 2 °, 3 °, 4 °, 5 °, 6 °, 7 °, 8 °, 9 °, 10 °, 11 °, 12 °, 13 °, 14 °, etc.; for another example, the second angle β between the second resin strip 22 and the 90 ° oriented weft yarn 12 is not only 0 ° and 15 °, but also can include any angle between 0 ° and 15 °, such as 1 °, 2 °, 3 °, 4 °, 5 °, 6 °, 7 °, 8 °, 9 °, 10 °, 11 °, 12 °, 13 °, 14 °, etc. All of the above can be designed according to actual needs, and will not be repeated here.

[0039] In combination with the above embodiments, in some embodiments, such as Figure 2 and Figure 3 As shown, the unit areas of the plurality of “convex”-shaped resin structures 20 on the fiber fabric 10 in the predetermined fabric are the same or approximately the same, and the spacings between adjacent resin structures 20 are equal. Specifically, the unit areas of the first resin strips 21 in the plurality of “convex”-shaped resin structures 20 are the same or similar, and the spacings between the first resin strips 21 in the adjacent “convex”-shaped resin structures 20 are equal, and at the same time, the unit areas of the second resin strips 22 in the plurality of “convex”-shaped resin structures 20 are the same or similar, and the spacings between the second resin strips 22 in the adjacent “convex”-shaped resin structures 20 are equal.

[0040] In combination with the above embodiments, in some embodiments, the density of the plurality of “convex”-shaped resin structures 20 on the fiber fabric 10 in the predetermined fabric gradually decreases in the direction from the edge of the fiber fabric 10 to the center of the fiber fabric 10. Figure 4 As shown, the density of the "convex"-shaped resin structure 20 near the edge of the fiber fabric 10 is greater than the density of the "convex"-shaped resin structure 20 near the center of the fiber resin away from the edge, that is, the spacing between adjacent "convex"-shaped resin structures 20 increases in the direction from the edge of the fiber fabric 10 to the center of the fiber fabric 10.

[0041] It should be understood that the embodiments of the resin structure 20 in the predetermined fabric are not limited to the embodiments in the above embodiments. For example, the surface area of ​​each first resin strip 21 and the second resin strip 22 may be the same or different. For another example, the multiple resin structures 20 near the edge of the fiber weaving may be small and dense, and the multiple resin structures 20 away from the edge of the fiber weaving may be large and sparse. All of the above can be adjusted according to actual needs and will not be elaborated here.

[0042] The exemplary embodiment of the present disclosure provides a pre-shaped fabric, which includes a fiber fabric 10 and a plurality of resin structures 20. The design of the fiber fabric 10 in the pre-shaped fabric can be referred to in the above embodiment. Figure 1 Corresponding to the fiber fabric 10, the plurality of resin structures 20 in the pre-shaped fabric are as follows Figure 5 As shown, a "cross"-shaped resin structure 20 has a unit area that gradually increases from the edge of the fiber fabric 10 to the center of the fiber fabric 10, or a unit area that gradually decreases from the edge of the fiber fabric 10 to the center of the fiber fabric 10, which will not be elaborated here.

[0043] The exemplary embodiment of the present disclosure provides a pre-shaped fabric, which includes a fiber fabric 10 and a plurality of resin structures 20. The design of the fiber fabric 10 in the pre-shaped fabric can be referred to in the above embodiment. Figure 1 The corresponding fiber fabric 10 is not described in detail here. The plurality of resin structures 20 in the pre-shaped fabric are as follows: Figure 6 The resin structures 20 are convex and cross-shaped, and the cross-shaped resin structures 20 and convex-shaped resin structures 20 are arranged at intervals in the extension direction of the 0° meridian.

[0044] It should be understood that the distribution of the "cross"-shaped resin structure 20 and the "convex"-shaped resin structure 20 is not limited to the scheme in the above example, and other schemes can also be adopted according to needs, such as the two being arranged at intervals in the extension direction of the 90° latitude, for example, Figure 7 As shown, a "convex" shaped resin structure 20 is set at the edge of the fiber fabric 10, and a "cross" shaped resin structure 20 is set at the edge away from the fiber fabric 10, etc. All of the above can be designed according to actual needs and will not be elaborated here.

[0045] The exemplary embodiment of the present disclosure provides a pre-shaped fabric, which includes a fiber fabric 10 and a plurality of resin structures 20. The fiber fabric 10 includes warp yarns 11 arranged in parallel in the 0° direction, weft yarns 12 intersecting the warp yarns 11 in the ±(10-90°) direction, and a braiding yarn 13 binding the warp yarns 11 and the weft yarns 12 together. Specifically, the braiding yarn 13 is a braiding yarn 13 that binds the warp yarns 11 and the weft yarns 12 together in a warp-plain manner. Figure 8 As shown, the plurality of resin structures 20 include four resin strips, namely, two first resin strips 21 and two second resin strips 22. The first resin strip 21 extends in a direction that forms a first angle α, such as 0°, with the warp yarn 11, and the second resin strip 22 extends in a direction that forms a second angle β, such as 0°, with the weft yarn 12. The pattern formed by the first resin strip 21 and the second resin strip 22 is a rhombus.

[0046] In combination with the above embodiments, in some embodiments, such as Figure 8 As shown, the unit areas of the plurality of rhombus-shaped resin structures 20 on the fiber fabric 10 in the pre-shaped fabric are the same or approximately the same, and the spacing between adjacent rhombus-shaped resin structures 20 is equal. Specifically, the unit area of ​​the rhombus-shaped resin structure 20 refers to the sum of the surface areas of each rhombus, that is, the sum of the surface areas of all the first resin strips 21 and the second resin strips 22 constituting the rhombus.

[0047] In some embodiments, Fig. 9 As shown, the density of the multiple diamond-shaped resin structures 20 on the fiber fabric 10 in the predetermined fabric gradually decreases in the direction from the edge of the fiber fabric 10 to the center of the fiber fabric 10. Specifically, it can be reflected in that the spacing between the diamond-shaped resin structures 20 gradually increases in the direction from the edge of the fiber fabric 10 to the center of the fiber fabric 10.

[0048] In some embodiments, Fig.10 As shown, the unit area of ​​the multiple diamond-shaped resin structures 20 on the fiber fabric 10 in the predetermined fabric gradually increases in the direction from the edge of the fiber fabric 10 to the center of the fiber fabric 10. Specifically, the diamond-shaped resin structures 20 near the edge of the fiber fabric 10 are small and dense, and the diamond-shaped resin structures 20 far from the edge of the fiber fabric 10 are large and sparse.

[0049] In some embodiments, Fig.11As shown, the unit area of ​​the multiple rhombus-shaped resin structures 20 on the fiber fabric 10 in the predetermined fabric gradually decreases in the direction from the edge of the fiber fabric 10 to the center of the fiber fabric 10, and the largest rhombus-shaped resin structure 20 has an intersection with each side of the fiber fabric 10, and the remaining rhombus-shaped resin structures 20 are respectively overlapped in the largest rhombus-shaped resin structure 20, and the corresponding endpoints of each rhombus-shaped resin structure 20 are respectively on the first straight line L1 and the second straight line L2, and the first straight line L1 is disposed on the second straight line L2.

[0050] It should be understood that the design of the rhombus-shaped resin structure 20 is not limited to the above embodiments. For example, the first angle α between the first resin strip 21 constituting the rhombus-shaped resin structure 20 and the warp yarn 11 may be any angle between 0° and 15°, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc. For example, the second angle β between the second resin strip 22 and the weft yarn 12 may be any angle between 0° and 15°, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc., in addition to being 0°. At any angle between 0° and 15°, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc. For example, the unit area of ​​the first resin strip 21 in the resin structure 20 in the same rhombus can be the same or different. For example, the unit area of ​​the second resin strip 22 in the resin structure 20 in the same rhombus can be the same or different. All of the above can be designed according to actual needs and will not be elaborated here.

[0051] In some embodiments, the resin strip in the resin structure is at least one of an epoxy resin strip, a vinyl resin strip, a polyimide resin strip, and a phenolic resin strip.

[0052] An embodiment of the present disclosure provides a glass fiber fabric composite, comprising the pre-shaped fabric of any one of the above embodiments.

[0053] An embodiment of the present disclosure provides a wind turbine blade, comprising the predetermined shaped fabric of any one of the above embodiments.

[0054] In the present disclosure, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of more restrictions, an element defined by the sentence "comprising..." does not exclude the presence of additional identical elements in the article or device comprising the element.

[0055] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present disclosure.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the intent of the present disclosure also includes these modifications and variations.

Claims

1. A pre-shaped fabric, characterized in that: include: Fabric and multiple resin structures, Wherein, the fiber fabric comprises warp yarns, weft yarns and braiding yarns, and the warp yarns and the weft yarns are oriented in different directions, and the braiding yarns bind the warp yarns and the weft yarns together; A plurality of resin structures are arranged at intervals on the surface of the fiber fabric, and each of the resin structures includes at least two resin strips, wherein an extension direction of one of the resin strips forms a first angle with an extension direction of the warp yarn, and an extension direction of the other resin strip forms a second angle with an extension direction of the weft yarn, the first angle is 0°-15°, and / or the second angle is 0°-15°.

2. The pre-shaped fabric according to claim 1, characterized in that: The density of the plurality of resin structures gradually decreases in a direction from an edge of the fiber fabric to a center of the fiber fabric.

3. The pre-shaped fabric according to claim 1, characterized in that: The unit areas of the plurality of resin structures are the same or approximately the same, and the intervals between adjacent resin structures are equal.

4. The pre-shaped fabric according to claim 1, characterized in that: The unit areas of the plurality of resin structures gradually change in a direction from the edge of the fiber fabric to the center of the fiber fabric.

5. The pre-shaped fabric according to any one of claims 1 to 4, characterized in that: The warp yarns are arranged in parallel in the 0° direction, and the weft yarns are arranged perpendicular to the warp yarns in the 90° direction. The multiple resin structures include at least one of a "convex" type and a "cross" type.

6. The pre-shaped fabric according to any one of claims 1 to 4, characterized in that: The warp yarns are arranged in parallel in the 0° direction, the weft yarns intersect with the warp yarns in the ±(10-90°) directions, and the plurality of resin structures include a rhombus.

7. The pre-shaped fabric according to any one of claims 1 to 4, characterized in that: The resin strip in the resin structure is at least one of an epoxy resin strip, a vinyl resin strip, a polyimide resin strip, and a phenolic resin strip.

8. A glass fiber fabric composite, characterized in that: The invention comprises the predetermined shaped fabric according to any one of claims 1 to 7.

9. A wind turbine blade, characterized in that: The invention comprises the predetermined shaped fabric according to any one of claims 1 to 7.

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