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Wind driven generator blade

A technology for wind turbines and blades, applied in wind turbine components, wind engines, wind power generation, etc., which can solve the problems of carbon fiber elongation, poor impact resistance and fracture toughness, affecting the performance of wind turbine blades, and the infiltration effect of composite materials Poor and other problems, to achieve the effect of improving shear strength, light weight and high strength

Inactive Publication Date: 2012-05-23
SANY ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the elongation, impact resistance and fracture toughness of carbon fiber are poorer than those of glass fiber, and they are prone to failure under extreme wind loads; in addition, when the number of layers of carbon fiber is large, the wetting effect of the composite material is poor, which will also affect Performance of wind turbine blades

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] See figure 2 , carbon fiber 21 and glass fiber 22 are arranged alternately in one direction according to the volume ratio of 1:1, then impregnated with epoxy resin, and after curing, the surface density is 125g / m 2 The weight ratio of total fiber to epoxy resin is 70:30.

[0044] The measured tensile strength of the composite material plate is 2500MPa, the bending strength is 1890MPa, and the shear strength is 51MPa.

[0045] Take 18 layers of prepreg and lay them up according to the layup sequence in Table 1 and the method of 0°, and then vacuumize and hot-press them on the main beam mold. The forming temperature is 180 °C and the forming pressure is 10 MPa to obtain the main beam.

[0046] Table 1 Lamination method of the main beam of a certain type of blade

[0047]

[0048]

Embodiment 2

[0050] The carbon fiber and the glass fiber are arranged alternately in one direction according to the volume ratio of 2:1, and then impregnated with epoxy resin, and after curing, the surface density is 112g / m 2 The weight ratio of total fiber to epoxy resin is 65:35.

[0051] The measured tensile strength of the composite material plate is 2680MPa, the bending strength is 1780MPa, and the shear strength is 48MPa.

[0052] Take 20 layers of prepregs according to the layup sequence in Table 2 and lay them up in the way of 0° / 90°, and then vacuumize and hot press them on the root end mold of the skin. The molding temperature is 175°C and the molding pressure is 8MPa. Skin.

[0053] Table 2. Root end laying method

[0054]

Embodiment 3

[0056] Arrange carbon fibers and glass fibers alternately in one direction according to the volume ratio of 1:2, then impregnate epoxy resin, and obtain an area density of 135g / m after curing 2 The unidirectional prepreg, the weight ratio of the total amount of fiber and epoxy resin is 68:32.

[0057] The measured tensile strength of the composite material plate is 2350MPa, the bending strength is 1940MPa, and the shear strength is 54MPa.

[0058] Take 18 layers of prepreg and lay them up according to the layup sequence in Table 3 and the method of 0° / 90°, and then vacuumize and hot-press on the web mold. The molding temperature is 165°C and the molding pressure is 9MPa to obtain the web core. The lower layer of material.

[0059] Table 3 Lay-up method of web at the root end

[0060]

[0061]

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Abstract

The invention provides a wind driven generator blade. The wind driven generator blade is made of composite material, and the composite material comprises multiple fiber layers and a base material attached to the multiple fiber layers; and the fiber layers comprise carbon fibers and glass fibers, and the volume ratio of the carbon fibers to the glass fibers is 1:4-4:1. The fiber layers in the wind driven generator blade comprise at least two kinds of fibers, namely the carbon fibers and the glass fibers, wherein the carbon fibers have the advantages of high strength and light weight; and the glass fibers have the advantage of good toughness, and have good interface wetness with resin. The glass fibers and the carbon fibers are made into the fiber layers and the fiber layers are superposed to form the wind driven generator blade, so that the wind driven generator blade has good tensile strength, and the toughness of the wind driven generator blade can be improved; and because the multiple fiber layers contain the glass fibers, the fiber layers can achieve a better wetting effect with the resin, and the shearing strength of the wind driven generator blade is improved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a blade of a wind power generator. Background technique [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world, and its reserves are huge. At present, using wind energy to generate electricity is an important way to utilize wind energy. The basic principle of wind power generation is to convert the kinetic energy of the wind into mechanical energy, and then convert the mechanical energy into electrical energy. The device used for wind power generation is called a wind turbine, and a wind turbine generally includes three parts: a wind wheel, a generator and a tower. [0003] The wind rotor is an important component that converts the kinetic energy of the wind into mechanical energy. It consists of at least two propeller-shaped wind turbine blades. When the wind blows to the wind turbine blades, ae...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D11/00B32B27/12
CPCY02E10/722
Inventor 杜志全杨文涛韩新月刘兰
Owner SANY ELECTRIC CO LTD
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