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Method for reinforcing repairing of major structural damage of blade main beam of wind turbine

A technology of wind turbine blade and repair method, which is applied in the direction of wind turbine, engine, wind power generation, etc., to achieve the effect of improving strength and rigidity

Active Publication Date: 2020-04-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty of blade repair lies in the maintenance of main beam damage. At present, there is no mature repair method for major structural damage of main beam at home and abroad.

Method used

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  • Method for reinforcing repairing of major structural damage of blade main beam of wind turbine
  • Method for reinforcing repairing of major structural damage of blade main beam of wind turbine
  • Method for reinforcing repairing of major structural damage of blade main beam of wind turbine

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Embodiment Construction

[0031] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] References to this example figure 1 , the main girder is a very important load-bearing structural part of the wind turbine blade. For the major structural damage of the blade main girder with more than 10 layers of unidirectional fabric damage, the present invention provides a reinforcement repair method for the main girder damage .

[0033] refer to figure 2 , this kind of main girder reinforcement adopts a double-lap splicing excavation repair method, and the damaged area is removed by two-way split-level lap splicing according to the damage location. The original undamaged area 3 should not be damaged as much as possible. The two-way excavation and mending lap size 5 along the length of the blade used to remove the damage is 100 mm. The repair layer used after removing the damaged area is collectively called the repair patch 4 .

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PUM

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Abstract

The invention discloses a method for reinforcing repairing of major structural damage of a blade main beam of a wind turbine. The dual-lap-joint digging reinforcing repairing is adopted for the majorstructural damage where the number of broken layers of unidirectional cloth of the blade main beam is larger than or equal to ten, that is, a dual-lap-joint digging repairing method is adopted according to a damaged part. After grinding paint surfaces, skin layers and multiple layers of main beam unidirectional cloth are laid, backfill is performed on corresponding layers of prepreg lap joint section unidirectional cloth, multiple layers of prepreg reinforcing unidirectional cloth and outer skin layers. The lap joint section unidirectional cloth and the reinforcing unidirectional cloth for backfill are made of a prepreg material, and the reinforcing repairing process is a vacuum bag press-forming method. The continuous safety operation capacity of blades which may be broken at any time isrestored, the technological problem of repairing of the blade main beam is broken through, and the novel method is provided for maintaining and repairing the blades of the wind turbine.

Description

technical field [0001] The invention relates to the technical field of wind turbine blades, in particular to a method for repairing major structural damage to a main beam of a wind turbine blade with a reinforcing effect. Background technique [0002] Wind turbines are often operated by the sea or remote mountaintops in harsh environments. Wind turbines operating in some areas of our country have to withstand harsher environmental conditions, such as frequent typhoons in the southeast coastal areas, low temperature in winter in northern China, and so on. The wind turbines currently in operation cannot fully adapt to the climatic conditions in our country, so that damage and failure of wind power equipment occur from time to time. The blade is one of the key components of the wind turbine, and its good design, reliable quality and superior performance are the decisive factors to ensure the normal and stable operation of the turbine. Therefore, the level of design and manufa...

Claims

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Application Information

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IPC IPC(8): F03D80/50
CPCF05B2230/80F05B2240/30F03D80/50Y02E10/72
Inventor 李慧王同光包洪兵陈程
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS