阅读说明：本技术 一种风电叶片叶根增厚层用玻璃纤维织物 (Glass fiber fabric for thickening layer of blade root of wind power blade ) 是由 刘召军 张健侃 潘春红 余万平 姜浪 于 2020-07-22 设计创作，主要内容包括：本发明公开了一种风电叶片叶根增厚层用玻璃纤维织物,包括依次铺设的-n°纬纱层、0°衬经纱层、90°纬纱层以及+m°纬纱层,-n°纬纱层、0°衬经纱层、90°纬纱层、+m°纬纱层通过捆绑纱捆绑在一起；-n°纬纱层的纬纱沿-n°方向斜向平行排列,0°衬经纱层由0°衬经纱平行排列而成,90°纬纱层的纬纱沿90°方向平行排列,+m°纬纱层的纬纱沿+m°方向斜向平行排列。本发明的风电叶片叶根增厚层用玻璃纤维织物可以大幅提升90°三轴玻璃纤维织物的拉伸、压缩性能,有效减少铺层数,改善浸润效果。(The invention discloses a glass fiber fabric for a thickening layer of a blade root of a wind power blade, which comprises a-n-degree weft yarn layer, a 0-degree warp yarn lining layer, a 90-degree weft yarn layer and a + m-degree weft yarn layer which are laid in sequence, wherein the-n-degree weft yarn layer, the 0-degree warp yarn lining layer, the 90-degree weft yarn layer and the + m-degree weft yarn layer are bound together through binding yarns; the weft yarns of the n-degree weft yarn layer are obliquely and parallelly arranged along the-n-degree direction, the warp yarn lining layers of 0 degrees are formed by parallelly arranging warp yarn lining layers of 0 degrees, the weft yarns of the 90-degree weft yarn layer are parallelly arranged along the 90-degree direction, and the weft yarns of the + m-degree weft yarn layer are obliquely and parallelly arranged along the + m-degree direction. The glass fiber fabric for the thickening layer of the blade root of the wind power blade can greatly improve the tensile and compressive properties of the glass fiber fabric with three axes of 90 degrees, effectively reduce the number of paving layers and improve the infiltration effect.)

1. The glass fiber fabric for the thickening layer of the blade root of the wind power blade is characterized by comprising a-n-degree weft yarn layer (01), a 0-degree warp yarn lining layer (05), a 90-degree weft yarn layer (02) and a + m-degree weft yarn layer (03) which are laid in sequence, wherein the-n-degree weft yarn layer (01), the 0-degree warp yarn lining layer (05), the 90-degree weft yarn layer (02) and the + m-degree weft yarn layer (03) are bound together through binding yarns (04); the weft yarns of the n-degree weft yarn layer (01) are obliquely and parallelly arranged along the n-degree direction, the 0-degree warp insertion yarn layer (05) is formed by parallelly arranging 0-degree warp insertion yarns, the weft yarns of the 90-degree weft yarn layer (02) are parallelly arranged along the 90-degree direction, and the weft yarns of the + m-degree weft yarn layer (03) are obliquely and parallelly arranged along the + m-degree direction.

2. The fiberglass fabric for a thickening layer for a root of a wind turbine blade according to claim 1, wherein-n ° is-45 °, -60 °, or-80 °; + m ° is +45 °, +60 ° or +80 °; n is m.

3. The fiberglass fabric for a wind blade root thickening layer according to claim 2, wherein said-n ° weft layer (01) comprises a first weft yarn and a second weft yarn, said first weft yarn and said second weft yarn of said-n ° weft layer (01) being arranged at intervals;

the + m DEG weft layer (03) comprises first weft yarns and second weft yarns, and the first weft yarns and the second weft yarns of the + m DEG weft layer (03) are arranged at intervals.

4. The glass fiber fabric for the thickening layer of the root of the wind turbine blade as claimed in claim 3, wherein the mass per unit area of the first weft yarn is 300-306 g/m²E7DR13-300-390 glass fiber yarn; the mass per unit area of the second weft yarn is 300-306 g/m²E7DR17-600-390 glass fiber yarn.

5. The glass fiber for the thickening layer of the root of a wind turbine blade of claim 3The fabric is characterized in that the mass per unit area of 90-degree weft yarns of the 90-degree weft yarn layer (02) is 895-901 g/m²The tension range of the 90 DEG weft yarn is 240 +/-40 cN.

6. The fiberglass fabric for the thickening layer of the blade root of the wind turbine blade as claimed in claim 5, wherein the 90 ° weft yarns are E7DR13-300-390 fiberglass yarns or E7DR17-600-390 fiberglass yarns.

7. The glass fiber fabric for the thickening layer of the blade root of the wind turbine blade as claimed in claim 1, wherein the 0-degree warp lining yarn is glass fiber yarn with ECR9-68-766 specification, and the mass per unit area is 1-3 g/m²。

8. The glass fiber fabric for the thickening layer of the blade root of the wind power blade as claimed in claim 7, wherein the binding yarn (04) is 100D-150D polyester yarn, the binding density of the binding yarn (04) is 6ends/inch, and the stitch length of the binding yarn (04) is 2.5-3.0 mm.

9. The glass fiber fabric for the thickening layer of the blade root of the wind turbine blade as claimed in claim 7, wherein the total mass per unit area of the glass fiber fabric is 1513 to 1519g/m²。

Technical Field

The invention relates to the technical field of glass fiber products, in particular to a glass fiber fabric for a thickening layer of a blade root of a wind power blade.

Background

The fan blade is one of key core components of the wind generating set. The performance and the power generation efficiency of the whole machine are directly influenced by the design, the manufacture and the operation state of the blades, and the influence on the operation cost of a wind power plant is great. From the view point of the value quantity of parts, the value quantity of the blades is extremely large, the cost of the blades accounts for 22.2% of the total cost of the fan, and the market space corresponding to the year 2020 of 2018 is about 130 billion yuan. With the increase of the size of the wind turbine and the development of offshore wind power, the blade is longer and has higher linear speed (up to 120 m/s), and the large-scale and light-weight of the wind turbine blade becomes the main development direction of the blade in the future.

At present, the wind power blade mainly takes glass fiber as a reinforcing material, and glass fiber fabrics for a blade root thickening layer of the wind power blade are mainly E-TTX1200 and E-TTX1215 products, so that the design requirement of a full large blade type thickening layer is difficult to meet in the aspect of tensile property. Therefore, the development of the glass fiber fabric for the large-blade shell has a positive effect on promoting the development of wind power.

Disclosure of Invention

In order to solve the technical problem, the invention provides a glass fiber fabric for a thickening layer of a blade root of a wind power blade.

According to one aspect of the invention, the glass fiber fabric for the thickening layer of the blade root of the wind power blade comprises a n-degree weft yarn layer, a 0-degree warp yarn lining layer, a 90-degree weft yarn layer and a + m-degree weft yarn layer which are sequentially laid, wherein the n-degree weft yarn layer, the 0-degree warp yarn lining layer, the 90-degree weft yarn layer and the + m-degree weft yarn layer are bound together through binding yarns; the weft yarns of the n-degree weft yarn layer are obliquely and parallelly arranged along the-n-degree direction, the warp yarn lining layers of 0 degrees are formed by parallelly arranging warp yarn lining layers of 0 degrees, the weft yarns of the 90-degree weft yarn layer are parallelly arranged along the 90-degree direction, and the weft yarns of the + m-degree weft yarn layer are obliquely and parallelly arranged along the + m-degree direction.

Alternatively, -n ° is-45 °, -60 °, or-80 °; + m ° is +45 °, +60 ° or +80 °; n is m.

Optionally, -the n ° layer of weft yarns comprises first weft yarns and second weft yarns, -the first weft yarns and the second weft yarns of the n ° layer of weft yarns are arranged at intervals; the + m ° weft layer includes first and second weft yarns, and the first and second weft yarns of the + m ° weft layer are arranged at intervals.

Optionally, the first weft yarn has a mass per unit area of 300-306 g/m²E7DR13-300-390 glass fiber yarn; the second weft yarn has a mass per unit area of 300 to 306g/m²E7DR17-600-390 glass fiber yarn.

Optionally, the 90-degree weft yarns of the 90-degree weft yarn layer have the mass per unit area of 895-901 g/m²The tension range of the 90 weft yarn is 240 +/-40 cN.

Alternatively, the E7DR13-300-390 glass fiber yarns or E7DR17-600-390 glass fiber yarns of 90 weft yarns.

Optionally, the 0-degree warp lining yarn is glass fiber yarn with an ECR9-68-766 specification, and the mass per unit area is 1-3 g/m²。

Optionally, the binding yarn is 100D-150D polyester yarn, the binding density of the binding yarn is 6ends/inch, and the stitch length of the binding yarn is 2.5-3.0 mm.

Optionally, the total mass per unit area of the glass fiber fabric is 1513-1519 g/m²。

The glass fiber fabric for the thickening layer of the blade root of the wind power blade can greatly improve the tensile and compressive properties of the glass fiber fabric with three axes of 90 degrees, effectively reduce the number of paving layers, improve the infiltration effect, achieve the characteristics of high production efficiency and good mechanical property of the blade, and provide infinite possibility for the efficiency improvement of the blade production, the weight reduction of the blade and the cost reduction of the blade, especially for the development and design of a large blade profile.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a fiberglass fabric for a blade root thickening layer of a wind turbine blade in an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that, in the embodiments and examples of the present application, the feature vectors may be arbitrarily combined with each other without conflict.

Wind power generation is one of the most mature technologies, the most extensive development conditions and the commercial development prospects in the renewable energy field, the development and the utilization of wind power are not limited by resources, the environmental impact is small, the large-scale and sustainable development can be realized, the global wind power is about 2.74 × 10⁹MW, in which the available wind power is 2 × 10⁷MW. Under the existing wind power technical conditions, wind energy resources in China can sufficiently support wind power installations of more than 10 hundred million kilowatts, and wind power generation is an important component in future energy and power structures. Meanwhile, the development of wind power generation has very important significance for solving the energy crisis, slowing down the climate change and adjusting the energy structure.

The fan blade is one of key core components of the wind generating set. The performance and the power generation efficiency of the whole machine are directly influenced by the design, the manufacture and the operation state of the blades, and the influence on the operation cost of a wind power plant is great. From the view point of the value quantity of parts, the value quantity of the blades is extremely large, the cost of the blades accounts for 22.2% of the total cost of the fan, and the market space corresponding to the year 2020 of 2018 is about 130 billion yuan. With the increase of the size of the wind turbine and the development of offshore wind power, the blade is longer and has higher linear speed (up to 120 m/s), and the large-scale and light-weight of the wind turbine blade becomes the main development direction of the blade in the future. At present, the wind power blade mainly takes glass fiber as a reinforcing material, so that the development of the glass fiber fabric for the large-blade shell has a positive effect on promoting the development of wind power.

At present, the main glass fiber fabrics for the thickening layer of the blade root of the wind power blade are E-TTX1200 and E-TTX1215 products, and the products can hardly meet the design requirement of a full-size blade type thickening layer on the tensile property.

The application provides a glass fiber fabric for a thickening layer of a blade root of a wind power blade, which comprises a-n-degree weft yarn layer, a 90-degree weft yarn layer and a + m-degree weft yarn layer which are sequentially laid from bottom to top, wherein the-n-degree weft yarn layer, the 90-degree weft yarn layer and the + m-degree weft yarn layer are bound together through binding yarns in a warp flat or stitch bonding mode; the weft yarns of the n-degree weft yarn layer are obliquely and parallelly arranged along the-n-degree direction, the weft yarns of the 90-degree weft yarn layer are obliquely and parallelly arranged along the 90-degree direction, and the weft yarns of the + m-degree weft yarn layer are obliquely and parallelly arranged along the + m-degree direction. By adopting full E7 high-modulus yarns, large-angle weft yarn layering and large gram weight design, the 90-degree tensile property is improved by 30 percent and the strength is improved by 12 percent compared with the conventional product. Meanwhile, the large and small weft yarn mixed-knitting cross weft laying process and the high-density stitch-bonding are combined, so that the size of weft yarn gaps is uniformly distributed, resin space flow channels are increased, the resin soaking speed is increased by 20-30% compared with that of a conventional product, and the soaking effect of the large-gram-weight fabric is effectively improved.

As shown in fig. 1, the glass fiber fabric for the thickening layer of the blade root of the wind power blade comprises a-n-degree weft yarn layer 01, a 0-degree warp yarn lining layer 05, a 90-degree weft yarn layer 02 and a + m-degree weft yarn layer 03 which are sequentially laid from bottom to top, wherein the-n-degree weft yarn layer 01, the 0-degree warp yarn lining layer 05, the 90-degree weft yarn layer 02 and the + m-degree weft yarn layer 03 are bound together through a binding yarn 04 in a flat or stitch-bonding mode; the wefts of the n-degree weft layer 01 are obliquely and parallelly arranged along the-n-degree direction, the warp insertion layer 05 of 0 degrees is formed by parallelly arranging warp insertion yarns of 0 degrees, the wefts of the 90-degree weft layer 02 are parallelly arranged along the 90-degree direction, and the wefts of the + m-degree weft layer 03 are obliquely and parallelly arranged along the + m-degree direction.

As an example, -n ° is-45 °, -60 °, or-80 °; + m ° is +45 °, +60 ° or +80 °; n is m. In this example, the glass fiber fabric of the present application comprises a-45 ° weft layer, a 0 ° warp-in layer 05, a 90 ° weft layer 02 and a +45 ° weft layer laid in this order from bottom to top; or comprises a-60-degree weft layer, a 0-degree warp lining layer 05, a 90-degree weft layer 02 and a + 60-degree weft layer which are sequentially paved from bottom to top; or comprises a-80-degree weft layer, a 0-degree warp lining layer 05, a 90-degree weft layer 02 and a + 80-degree weft layer which are sequentially paved from bottom to top.

Based on the above example, the preferred embodiment of the present application is that the glass fiber fabric comprises a-45 ° weft layer, a 0 ° warp lining layer 05, a 90 ° weft layer 02 and a +45 ° weft layer which are laid in sequence from bottom to top. Under the condition, the-45-degree weft yarn layer is perpendicular to the + 45-degree weft yarn layer, the weft yarns of the-45-degree weft yarn layer and the weft yarns of the + 45-degree weft yarn layer form a square grid, resin space flow channels are increased when the glass fiber fabric is subsequently soaked with resin, the resin soaking speed is increased by 20-30% compared with that of a conventional product, and the soaking effect of the fabric with large gram weight is effectively improved.

As an example, the n ° weft layer 01 comprises a first weft yarn and a second weft yarn, and the first weft yarn and the second weft yarn of the n ° weft layer 01 are arranged at intervals one laying weft. The + m ° weft layer 03 includes first weft yarns and second weft yarns, and the first weft yarns and the second weft yarns of the + m ° weft layer 03 are arranged at intervals by one weft.

Based on the above examples, one possible embodiment of the present application is that the first weft yarn has a mass per unit area of 300-306 g/m²E7DR13-300-390 glass fiber yarn; the second weft yarn has a mass per unit area of 300 to 306g/m²E7DR17-600-390 glass fiber yarn.

The mass per unit area of the-n DEG weft layer 01 is 300 to 306g/m²The E7DR13-300-390 glass fiber yarn and the second weft yarn have a mass per unit area of 300-306 g/m²The E7DR17-600-390 glass fiber yarns were laid at intervals in the ABABAB manner.

The + m DEG weft layer 03 has a mass per unit area of 300 to 306g/m²The E7DR13-300-390 glass fiber yarn and the second weft yarn have a mass per unit area of 300-306 g/m²The E7DR17-600-390 glass fiber yarns were laid at intervals in the ABABAB manner.

The n-degree weft yarn layer 01 and the + m-degree weft yarn layer 03 adopt glass fibers of two specifications to be mixed and woven, and weft yarns are laid in a crossed mode, after the glass fiber fabrics are woven and sewn, the glass fibers of the two specifications are mixed and woven and crossed, so that the resin space flow channel is increased while the uniform distribution of the sizes of weft yarn gaps is ensured, and the resin soaking speed and the soaking effect of the glass fiber fabrics are further improved.

As an example, the mass per unit area of 90-degree weft yarns of the 90-degree weft yarn layer 02 is 895-901 g/m²The tension range of the 90 weft yarn is 240 +/-40 cN.

As an example, the E7DR13-300-390 glass fiber yarns or E7DR17-600-390 glass fiber yarns of 90 weft yarns.

As an example, the 0-degree warp lining yarn adopts glass fiber yarn with ECR9-68-766 specification, and the mass per unit area is 1-3 g/m²。

The glass fiber fabric is triaxial glass fiber fabric, and in order to improve the cloth surface smoothness and stability of the glass fiber fabric, a 0-degree warp padding layer 05 is laid between a-n-degree weft layer 01 and a + m-degree weft layer 03 to serve as a stable layer, so that the cloth surface weaving effect of the glass fiber fabric is stabilized, the cloth surface smoothness is improved, and the conditions such as yarn shedding during cutting of the glass fiber fabric can be effectively reduced.

As an example, the glass fiber fabric of the present application comprises a-n ° weft layer 01, a warp-inserted layer 05, a 90 ° weft layer 02 and a + m ° weft layer 03 laid in this order from bottom to top; the n ° weft layer 01, the warp inserted layer 05, the 90 ° weft layer 02 and the + m ° weft layer 03 are bound together by binding yarns 04 in a flat or stitch-bonded manner.

The mass per unit area of the-n DEG weft layer 01 is 300 to 306g/m²The E7DR13-300-390 glass fiber yarn and the second weft yarn have a mass per unit area of 300-306 g/m²The E7DR17-600-390 glass fiber yarns were laid in spaced-apart intervals in the-n direction in the ABABABAB mode.

The mass per unit area of the lining warp yarn layer 05 is 1-3 g/m²The glass fiber yarn with the ECR9-68-766 specification is formed by parallel weft laying in the 0-degree direction.

The 90 DEG weft layer 02 has a mass per unit area of 895-901 g/m²E7DR13-300-390 glass fiber yarn or E7DR17-600-390 glass fiber yarn with the tension range of 240 +/-40 cN is laid in parallel.

The + m DEG weft layer 03 has a mass per unit area of 300 to 306g/m²The E7DR13-300-390 glass fiber yarn and the second weft yarn have a mass per unit area of 300-306 g/m²The E7DR17-600-390 glass fiber yarns were laid in spaced apart rows in the + m direction in the ABABAB mode.

As an example, the binding yarn 04 is 100D-150D polyester yarn, the binding density of the binding yarn 04 is 6ends/inch, and the stitch length of the binding yarn 04 is 2.5-3.0 mm.

As an example, the total mass per unit area of the glass fiber fabric is 1513 to 1519g/m²。

The glass fiber fabric for the blade root thickening layer of the wind turbine blade of the present application is compared with the glass fiber fabric of the comparative example by the following table.

The glass fiber fabric formed by binding the conventional 90-degree weft yarns and 0-degree warp yarns is selected in the comparative example of the application.

It can be seen that the glass fiber fabric realizes that the 90-degree tensile property is improved by 30% and the strength is improved by 12% compared with a conventional product by adopting full E7 high-modulus yarns, large-angle weft yarn layering and large gram weight design. Meanwhile, the large and small weft yarn mixed-knitting cross weft laying process and the high-density stitch-bonding are combined, so that the size of weft yarn gaps is uniformly distributed, resin space flow channels are increased, the resin soaking speed is increased by 20-30% compared with that of a conventional product, and the soaking effect of the large-gram-weight fabric is effectively improved.

It is to be noted that, in this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that an article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.

The above embodiments are merely to illustrate the technical solutions of the present invention and not to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it should be understood that the present invention is to be covered by the appended claims.