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Method for manufacturing root portion of fan blade with square embedded bolt sleeve

A technology of pre-embedding bolts and fan blades, which is used in mechanical equipment, wind turbines, wind turbine components, etc., can solve the problems of pulling out the bolt sleeve and harmful blade operation, and achieves increased strength, high firmness, and reasonable process design. Effect

Active Publication Date: 2014-10-22
中复连众(玉溪)复合材料有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the pre-embedded bolt sleeves of the prior art are generally circular, and when the root of the blade is infused with vacuum during preparation, the four corners of the circular pre-embedded bolt sleeve are prone to resin accumulation, which has a great impact on the operation of the blade. It is very harmful to the blade, and may cause dangerous situations such as the bolt sleeve being pulled out of the blade root layup under the condition of high-speed rotation of the blade

Method used

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  • Method for manufacturing root portion of fan blade with square embedded bolt sleeve
  • Method for manufacturing root portion of fan blade with square embedded bolt sleeve
  • Method for manufacturing root portion of fan blade with square embedded bolt sleeve

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Embodiment 1

[0039] 1. A method for preparing the root of a fan blade with a square pre-embedded bolt sleeve, comprising the following steps:

[0040] a. Preparation of square bolt sleeves:

[0041] Choose circular bar or metal material with square cross-section as the processing substrate, heat the circular or square processing substrate, then put it into the mold with the reverse shape of the square bolt sleeve, apply external load pressure, and process it into a surface There is a square bolt sleeve with horizontal or threaded grooves, and then the surface of the square bolt sleeve is sandblasted to prepare a square bolt sleeve (1); as Figures 1 to 3 Shown:

[0042] b. Wrap the roving (2) in the surface groove of the square bolt sleeve (1);

[0043] c, then install a steel flange (4) for positioning the square bolt sleeve (1) at the root of the blade mold (3);

[0044] d. Lay a release cloth inside the root of the blade mold (3), and then lay a dry glass fiber cloth (5) of a certain...

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Abstract

The invention discloses a method for manufacturing the root portion of a fan blade with a square embedded bolt sleeve. The method includes the steps that the square bolt sleeve is manufactured, twistless rovings are wound in a surface groove of the square bolt sleeve, then, optimization technological processing is conducted, and the square bolt sleeve and the root portion of the blade are integrally formed in a vacuum pouring mode so that the root portion of the fan blade can be obtained. According to the method for manufacturing the root portion of the fan blade with the square embedded bolt sleeve, the entire technological design is reasonable, operation is simple and convenient, plenty of manpower and material resources can be saved, and the production efficiency is higher. In particular, the optimized technology is adopted, the square embedded bolt sleeve is obtained, the strength and the firmness degree of the root portion of the blade can be greatly improved, the problem that the periphery of the bolt sleeve is rich in glue can be effectively solved, so that the strength of the fan blade is greatly increased, the dangerous condition that the bolt sleeve is pulled out of a laying layer of the root portion of the blade can be prevented, safe operation of long blade and high load fan blades can be guaranteed, and a good technological effect is achieved.

Description

technical field [0001] The patent of the invention relates to a method for the root of a fan blade, in particular to a method for preparing the root of a fan blade with a square pre-embedded bolt sleeve, which belongs to the technical field of wind power generation. Background technique [0002] China's wind power industry started in 2005. After 9 years of rapid development, the products of wind turbines have been rapidly enriched, and there are dozens of models. The wind fields covered by it range from super class one to weak class four. [0003] Wind power blades are an important part of wind turbines. At present, the length of the blades is getting longer and longer, and the bending moment at the root is also increasing. More and more pre-embedded bolt sleeve technology is used at the root of the blades. [0004] However, the pre-embedded bolt sleeves of the prior art are generally circular, and when the root of the blade is infused with vacuum during preparation, the fo...

Claims

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Application Information

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IPC IPC(8): F03D11/00B29C70/36B29C70/54B29B11/00
CPCY02E10/72Y02P70/50
Inventor 黄辉秀刘卫生齐帆
Owner 中复连众(玉溪)复合材料有限责任公司
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