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A method of manufacturing a wind power blade root prefabricated part

A wind power blade and a manufacturing method technology are applied in the field of manufacture of wind power blade root prefabricated parts, which can solve the problems of not considering exothermic peak temperature difference, difficulty in bolt installation, blade root prefabricated parts or blade scrapping, etc., so as to shorten the curing time , the effect of reducing internal stress

Active Publication Date: 2020-09-29
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It does not consider controlling the exothermic peak temperature of the curing process and the temperature difference between the inner and outer surfaces of the blade root preform by controlling the temperature of the mold, so the problem of curing deformation of the blade root preform still exists, resulting in difficulties in bolt installation or even failure to install. Scrapping of root preforms or blades

Method used

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  • A method of manufacturing a wind power blade root prefabricated part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Pass water at 30°C into the blade root prefabricated mold, complete the laying and installation of the blade root prefabricated parts on the blade root prefabricated mould, vacuum infuse the resin, and the resin starts to solidify;

[0045] 2) 2 hours after the vacuum infusion of resin is completed, lay a quilt on the upper surface of the blade root prefabricated part, raise the temperature of the water passed into the blade root prefabricated mold to 40°C, and heat up the blade root prefabricated mold. After 4 hours, the resin Curing is complete; control the exothermic peak temperature during the entire resin curing process to 55°C;

[0046] 3) Cool down the water passed into the mold of the blade root preform at a cooling rate of 3°C / h, so that the temperature difference between the temperature of the blade root preform mold and the temperature of the inner surface of the blade root preform is below 10°C, when the blade root preform When the positive temperature di...

Embodiment 2

[0048] 1) Pass water at 33°C into the blade root prefabricated mold, complete the laying and installation of the blade root prefabricated parts on the blade root prefabricated mould, vacuum infuse the resin, and the resin begins to solidify;

[0049] 2) 3 hours after the vacuum infusion of resin is completed, lay insulation cotton on the upper surface of the blade root prefabricated part, raise the temperature of the water passed into the blade root prefabricated mold to 50°C, and heat up the blade root prefabricated mold. After 5 hours, the resin Curing is complete; the exothermic peak temperature during the entire resin curing process is 60°C;

[0050] 3) Cool down the water passed into the mold of the blade root preform, the cooling rate is 8°C / h, so that the temperature difference between the temperature of the blade root preform mold and the temperature of the inner surface of the blade root preform is below 10°C, when the blade root preform When the positive temperature ...

Embodiment 3

[0052] 1) Pass water at 35°C into the blade root prefabricated mold, complete the laying and installation of the blade root prefabricated parts on the blade root prefabricated mould, vacuum infuse the resin, and the resin begins to solidify;

[0053] 2) 4 hours after the vacuum infusion of resin is completed, lay a sponge on the upper surface of the blade root prefabricated part, raise the temperature of the water passed into the blade root prefabricated mold to 60°C, heat up the blade root prefabricated mold, and the resin will solidify after 6 hours Complete; control the exothermic peak temperature during the entire resin curing process to be 70°C;

[0054] 3) Cool down the water passed into the mold of the blade root preform at a cooling rate of 12°C / h, so that the temperature difference between the temperature of the blade root preform mold and the temperature of the inner surface of the blade root preform is below 10°C, when the blade root preform When the positive temper...

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Abstract

The invention discloses a manufacturing method of a blade root prefabricated part of a wind blade. The manufacturing method of the blade root prefabricated part of the wind blade comprises the following steps that laying and mounting of the blade root prefabricated part are completed on a blade root prefabricated part mold, resin is poured into the blade root prefabricated part mold under vacuum,a heat preservation layer is laid on the upper surface of the blade root prefabricated part 1-4 h later, the temperature of a liquid medium is increased to 40-60 DEG C, and the resin is cured 4-6 h later; the exothermic peak temperature is controlled to 50-70 DEG C in the whole resin curing process; and the liquid medium is cooled, supply of the liquid medium is stopped when the positive temperature difference between the temperature of the inner surface of the blade root prefabricated part and the environmental temperature is 5-20 DEG C, and then demolding is conducted to obtain the blade root prefabricated part. According to the manufacturing method of the blade root prefabricated part of the wind blade, the temperature and time of the liquid medium poured into the blade root prefabricated part mold in the curing process and the laying time of the heat preservation layer are accurately controlled so that the exothermic peak temperature can be controlled 50-70 DEG C in the whole resincuring process, the internal stress of the resin in the curing process is reduced, and curing deformation of the resin is controlled.

Description

technical field [0001] The invention belongs to the technical field of wind power equipment, and in particular relates to a method for manufacturing a wind power blade root prefabricated part. Background technique [0002] The pre-embedded bolt sleeve is one of the technologies commonly used in the wind power blade industry. However, during the implementation of the pre-embedded bolt sleeve technology, there are problems such as wrinkle defects at the end of the embedded part. At the same time, with the development of blade technology, the blade forming efficiency The improvement of the blade root has become a problem that cannot be ignored. The pre-embedded bolt sleeve technology includes the installation process of a large number of sporadic components such as the embedded bolt sleeve, embedded wedge block, and embedded filler block. It takes a long time, so the blade root prefabrication technology has emerged . [0003] Blade root prefabrication technology refers to a te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/44B29C70/54B29C33/04B29L31/08
CPCB29C33/04B29C70/443B29C70/54B29L2031/082
Inventor 梁自禄刘海洋陈煌喻雄孔令义
Owner ZHUZHOU TIMES NEW MATERIALS TECH