Preliminary dip material for wind-driven generator impeller vane

A technology of wind turbines and prepregs, applied in wind turbine components, wind engines, wind power generation, etc., can solve the problems of unstable resin content, high viscosity, harmful to human body, etc., and achieve the effect of superior mechanical properties

Active Publication Date: 2008-10-29
WEIHAI GUANGWEI COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of unsaturated polyester resin has volatile substances such as styrene in the production process, which will have adverse effects on the environment and operators
Similarly, the use of epoxy resin room temperature curing system as the base material also has the disadvantages of unstable resin content of the product, curing system is harmful to the human body, and poor operating environment.
And it is difficult to solidify in a short time at a relatively low temperature, and the viscosity is relatively high, which is not conducive to fully impregnating the reinforcement material with a relatively large thickness. At the same time, the mechanical properties are poor, and it cannot be stored for a long time at room temperature.

Method used

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  • Preliminary dip material for wind-driven generator impeller vane
  • Preliminary dip material for wind-driven generator impeller vane
  • Preliminary dip material for wind-driven generator impeller vane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] like figure 1 As shown, in this embodiment, the release paper is used as a carrier, and the epoxy resin matrix is ​​coated. After the epoxy resin matrix is ​​heated and melted, the fiber reinforcement material is impregnated to form a prepreg. The fiber reinforcement material is a biaxial warp knitted fabric, and the fiber reinforcement The mass per unit area of ​​the material is greater than or equal to 400g / m 2 , less than or equal to 2000g / m 2 , the fiber reinforced material is +45 degree fiber 2 and -45 degree fiber 1 biaxial warp knitted fabric stitched by polyester yarn, and the fiber is one or more of glass fiber, carbon fiber, basalt fiber, aramid fiber Several kinds.

[0024] The mass per unit area of ​​polyester yarn is greater than or equal to 5g / m 2 , less than or equal to 15g / m 2 , and does not contain any lubricants. The gel time of the epoxy resin matrix at 120°C is less than or equal to 25min, the viscosity of the lowest point of the epoxy resin mat...

Embodiment 2

[0041] like image 3 As shown, in this embodiment, the release paper is used as the carrier, and the epoxy resin matrix is ​​coated. After the epoxy resin matrix is ​​heated and melted, the fiber reinforcement material is impregnated to form a prepreg. The fiber reinforcement material is a triaxial warp knitted fabric, and the fiber reinforcement The mass per unit area of ​​the material is greater than or equal to 400g / m 2 , less than or equal to 2000g / m 2 , the inner 35mm area of ​​the warp knitted fabric only has ±45° fibers, and the middle area contains 0° fibers in addition to +45° fiber 2 and -45° fiber 1. The triaxial warp stitched by polyester yarn For braided fabrics, polyester yarn with obvious color difference is used at the junction of triaxial area 5 and biaxial area 4 to form marking line 3 with obvious color difference. The fiber is one of glass fiber, carbon fiber, basalt fiber, and aramid fiber. species or several.

[0042] The mass per unit area of ​​polyes...

Embodiment 3

[0045] like figure 2 As shown, in this embodiment, the release paper is used as the carrier, and the epoxy resin matrix is ​​coated. After the epoxy resin matrix is ​​heated and melted, the fiber reinforcement material is impregnated to form a prepreg. The fiber reinforcement material is a triaxial warp knitted fabric, and the fiber reinforcement The mass per unit area of ​​the material is greater than or equal to 400g / m 2 , less than or equal to 2000g / m 2, the 70mm area in the center of the warp knitted fabric and the inward 35mm area of ​​the fabric edge only have ±45° fibers, and the other areas contain 0° fibers in addition to +45° fiber 2 and -45° fiber 1, which are stitched by polyester yarn The triaxial warp-knitted fabric, the polyester yarn with obvious color difference is used at the junction of the triaxial area 5 and the biaxial area 4 to form a marking line 3 with obvious color difference, and the fibers are glass fiber, carbon fiber, basalt fiber, One or sever...

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Abstract

The invention relates to the field of polymer materials and particularly relates to a prepreg used for blades of a wind power generator. The prepreg is formed by using release paper as a carrier, applying an epoxy resin matrix to the carrier, heating and melting the epoxy resin matrix, and impregnating the same with a fiber reinforcement material. The weight content of the epoxy resin matrix in the prepreg is more than or equal to 25% but less than or equal to 60%. The fiber reinforcement material is multi-axial warp-knitted fabric. The mass per unit area of the fiber reinforcement material is more than or equal to 400 g/m<2> but less than or equal to 2000 g/m<2>. The fiber reinforcement material is the warp-knitted fabric formed by knitting fiber of plus or minus 45 DEG with polyester yarns or covering one surface of the warp-knitted fabric with a fibrofelt before knitting. Alternatively, the fiber reinforcement material is the warp-knitted fabric formed by knitting fiber of plus or minus 45 DEG and 0 DEG with polyester yarns, and optionally one surface of the warp-knitted fabric is covered with a fibrofelt before knitting.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a prepreg for wind generator blades made of reinforcing fibers. Background technique [0002] Wind power blades are one of the core components of wind turbines. To be able to produce high-quality blades requires the guarantee of superior performance and suitable raw materials. Fiber-reinforced plastic composites (FRP for short) are the preferred materials for the production of wind power blades because of their high specific strength and large specific modulus. Usually, the most common material used for the production of blades is to use unsaturated polyester resin or epoxy resin of room temperature curing system as the matrix resin and combine with glass fiber to cure. The use of unsaturated polyester resin has volatile substances such as styrene in the production process, which will have adverse effects on the environment and operators. Also use the epoxy resin normal tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24C08L63/00F03D1/06F03D3/06F03D11/00B29C70/70B29K63/00F03D80/00
CPCY02E10/721Y02E10/74Y02E10/72
Inventor 夏向欣梁日信林凤森段长兵
Owner WEIHAI GUANGWEI COMPOSITES
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