Judgment method for blade fold defects
A wrinkle and blade technology, applied in the field of defect evaluation, can solve the problems of shortened blade life, no evaluation criteria for blade wrinkle defects, and reduced overall mechanical properties of the blade.
Inactive Publication Date: 2017-08-22
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Problems solved by technology
[0005] As mentioned above, during the production process of the blade, due to the thick main beam and the root layer, wrinkles will occur if you do not pay attention, which will lead to a significant decline in the overall mechanical properties of the blade and greatly shorten the life of the blade. Therefore, it is necessary to Pre-judgment of blade wrinkle defects
[0006] However, so far, there is no data to characterize the effect of wrinkling on the mechanical properties of the blade. There is no clear data to characterize the influence of different types of wrinkles and the size of the aspect ratio on the mechanical properties of the blade, and there is no specific judgment for judging the wrinkle defects of the blade. Therefore, it is difficult for those skilled in the art to make an objective judgment on blade wrinkle defects or blades
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[0033] The present invention simulates different types of folds of real blades through blade samples, and determines the relationship between the tensile performance index of the blade sample and the relevant parameter information of the blade sample through the experimental data of the blade sample, thereby obtaining the blade The basis for judging wrinkle defects (or judging criteria) is to determine whether the real blade is qualified by actually measuring the relevant parameter information of the real blade and the above relational formula, that is, to judge whether the wrinkle defect of the blade is within an acceptable range.
[0034] It should be pointed out that since the main beam is the main component bearing the force of the blade, the main beam of the blade is taken as the main experimental object in the present invention. In other words, the relevant parameter information of the blade may refer to the relevant parameter information of the main beam of the blade. A...
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Abstract
The invention discloses a judgment method for blade fold defects. The method comprises the steps that S110, relevant parameter information of folds of a blade is measured; S120, a sample of the blade is manufactured, and different folds are formed in the sample; S130, tensile property parameters of the different types of the folds of the sample are measured through a tensile experiment, and a relational expression between the relevant parameter information of the sample and tensile property parameter indexes of the sample is determined; and S140, whether the blade meets requirements or not is determined according to the relevant parameter information of the folds of the blade and the relational expression.
Description
technical field [0001] The invention relates to a method for judging defects, in particular, the invention relates to a method for judging the wrinkle defects of blades of a wind power generating set. Background technique [0002] The blade is the key component of the wind power generating set, mainly composed of the blade shell (including the pressure side shell and the suction side shell), the main beam, etc., and can be formed by vacuum infusion. [0003] The blade length of mainstream wind turbines is about 50-60m, and the longest blade has reached 88.4m. The longer the blade, the higher the requirements for materials and processes. [0004] After the length of the blade is increased, in order to ensure sufficient structural performance, it is usually necessary to increase the thickness of the root and the main beam or to use carbon fiber or carbon / glass hybrid fiber as a reinforcement material. The life of the blade is as long as 20 years, and the blade needs to bear c...
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IPC IPC(8): F03D17/00B29C70/36
CPCB29C70/36Y02P70/50
Inventor 何成智李阳阳马小军
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD