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Reinforcement repair method for major structural damage of main beam of wind turbine blade

A technology for wind turbine blades and repair methods, which is applied to wind power engines, engines, wind power generation, etc., to achieve the effect of improving strength and stiffness

Active Publication Date: 2021-01-26
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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  • Reinforcement repair method for major structural damage of main beam of wind turbine blade
  • Reinforcement repair method for major structural damage of main beam of wind turbine blade
  • Reinforcement repair method for major structural damage of main beam of wind turbine blade

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Experimental program
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Embodiment Construction

[0031] Embodiments of the present invention will be further described in 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 the method of excavation and repair with double lap joints, and the damaged area is removed by two-way split-level lap joints 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 pa...

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PUM

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Abstract

The invention discloses a method for reinforcing the main beam of a wind turbine blade. Aiming at a major structural damage in which the number of damaged layers of the blade main beam exceeds 10, the double-lap joint excavation and reinforcing repair method is adopted: that is, according to the damaged part, The repair method of double lap splicing was adopted. After polishing the paint surface, skin layer and several layers of main beam unidirectional fabric, backfill the corresponding layer of prepreg overlapping section unidirectional fabric, and several layers of prepreg reinforce the unidirectional fabric and outer skin layer. Among them, the unidirectional fabric of the backfilled overlapping section and the reinforced unidirectional fabric are made of prepreg materials, and this reinforcing repair process is a vacuum bag compression molding method. The invention restores the continuous and safe operation capability of the blades that may be broken at any time, breaks through the technical problem of repairing the main beam of the blades, and provides a new method for the maintenance and repair of the wind turbine blades.

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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Patent Type & Authority Patents(China)
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