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Carbon fiber for wind turbine blade beam rising and preparation method thereof

A technology for wind turbines and wind turbines, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of high cost, difficulty in meeting blade stiffness requirements, and restricting the large-scale use of carbon fibers, achieving compact structure and high operating costs. , the effect of high spinning speed

Pending Publication Date: 2021-02-05
ZHONGFU SHENYING CARBON FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of blade size, traditional glass fiber composite materials are difficult to meet the blade stiffness requirements, so carbon fiber composite material blades have been developed, which are mainly used in the main load-bearing mechanism-the beam cap, but the high cost limits the size of carbon fiber. Scale use

Method used

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  • Carbon fiber for wind turbine blade beam rising and preparation method thereof
  • Carbon fiber for wind turbine blade beam rising and preparation method thereof
  • Carbon fiber for wind turbine blade beam rising and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The dry-jet wet-spinning carbon fiber process is used to obtain raw silk with a single-filament diameter of 12 μm and a single-filament strength of 8.2 cN / dtex, with a spinning speed of 400m / min and a tow specification of 24K; after carbonization treatment of 11m / min, the highest pre-oxidation temperature is 275°C , the draft ratio is 0.96, the maximum temperature of low-temperature carbonization is 700°C, the draft ratio is 1.05, the maximum temperature of high-temperature carbonization is 1300°C, and the draft ratio is 0.95; the sizing agent is a modified epoxy-type sizing agent, the sizing agent content is 1.2%, and the obtained strength is 4520MPa , Modulus 240GPa, elongation at break 1.88%, interlaminar shear strength 110MPa. The carbon fiber pultruded sheet of the wind power blade beam is prepared by using epoxy resin matrix and pultrusion method. The fiber volume content of the pultruded sheet can reach 71%, the 0° tensile strength is above 2210MPa, the tensile mo...

Embodiment 2

[0026] The dry-jet wet-spinning carbon fiber process is used to obtain raw silk with a single-filament diameter of 12 μm and a single-filament strength of 8.2 cN / dtex, with a spinning speed of 400m / min and a tow specification of 24K; after carbonization treatment of 11m / min, the highest pre-oxidation temperature is 275°C , the draft ratio is 0.98, the maximum temperature of low-temperature carbonization is 680°C, the draft ratio is 1.03, the maximum temperature of high-temperature carbonization is 1300°C, and the draft ratio is 0.95; the sizing agent is a modified epoxy-type sizing agent, the sizing agent content is 1.2%, and the obtained strength is 4512MPa , Modulus 241GPa, elongation at break 1.87%, interlaminar shear strength 112MPa, resin fibers are epoxy and vinyl resins. The carbon fiber pultruded sheet of the wind power blade beam made of epoxy resin matrix and prepreg has a fiber volume content of 71.2%, a tensile strength of 2078MPa at 0°, and a tensile modulus of 142...

Embodiment 3

[0028] The dry-jet wet-spinning carbon fiber process is used to obtain a raw filament with a single filament diameter of 12μm and a single filament strength of 8.2cN / dtex, with a spinning speed of 450m / min and a tow specification of 24K; after carbonization treatment of 11m / min, the highest pre-oxidation temperature is 275°C , the draft ratio is 0.98, the maximum temperature of low-temperature carbonization is 680°C, the draft ratio is 1.01, the maximum temperature of high-temperature carbonization is 1350°C, and the draft ratio is 0.98; the sizing agent is a modified epoxy-type sizing agent, the sizing agent content is 1.0%, and the obtained strength is 4581MPa , Modulus 240GPa, elongation at break 1.89%, interlaminar shear strength 115MPa, resin fibers are epoxy and vinyl resins. The carbon fiber pultruded sheet of the wind power blade beam made of epoxy resin matrix and vacuum infusion method has a fiber volume content of 70.2%, a 0° tensile strength of 2013MPa or more, a te...

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Abstract

The invention discloses a carbon fiber for wind turbine blade beam rising and a preparation method thereof. A carbon fiber precursor is prepared by adopting a dry-jet wet spinning process, the tow specification is 24K or above, the spinning speed is 400m / min or above, and the precursor single-bundle production efficiency is 60Kg / h or above; and carbonization speed is 11 m / min or more. The carbon fiber has a tensile strength of 4500 MPa or more, a tensile modulus of 230 GPa or more, and an elongation at break of 1.8% or more. Different sizing agents are adopted, so that the sizing agents are suitable for different resin matrixes such as epoxy and vinyl. The carbon fiber has the advantages of high production efficiency, high tensile strength and good process performance, and is suitable formanufacturing wind turbine blade beam rising.

Description

technical field [0001] The technical field of the invention is the field of carbon fiber, and in particular relates to a carbon fiber for a wind turbine blade girder and a preparation method thereof. Background technique [0002] Carbon fiber has excellent characteristics such as high strength, high modulus, high temperature resistance, corrosion resistance, friction resistance, electrical conductivity, thermal conductivity, and small thermal expansion coefficient. It is used in various fields such as industry, agriculture, transportation, military, construction, and bio-compatible materials. be widely used. [0003] Wind turbines are an important field of application of composite materials. A large number of composite materials are used in their blades. In the past, glass fiber composite materials were mainly used. However, with the increase of blade size, traditional glass fiber composite materials are difficult to meet the blade stiffness requirements, so carbon fiber co...

Claims

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Application Information

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IPC IPC(8): D01F9/22
CPCD01F9/22
Inventor 郭鹏宗刘府杨平刘高君李韦
Owner ZHONGFU SHENYING CARBON FIBER