Nondestructive testing method for bonding defects of shell of wind turbine blade and web plate

A technology for blades and shells of wind turbines, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves. It can solve the problems of defect judgment criteria, poor signal penetration, and many interference signals, and achieve the effect of high speed.

Active Publication Date: 2015-03-25
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0007] In the non-destructive testing of wind turbine blade shell and web bonding, there will be problems such as complex internal structure, poor penetration of various signals, many interference signals, and lack of defect judgment criteria. A...

Method used

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Embodiment Construction

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail in conjunction with specific embodiments.

[0025] The object of this embodiment is a certain MW-class wind turbine blade. The steps for carrying out non-destructive testing on the bonding part of the shell and web of the blade are as follows:

[0026] 1) For this MW-level blade, check the actual blade and blade design data to determine the bonding width of the blade shell and the web, and the layer thickness of the shell fiberglass from the tip to the root.

[0027] 2) Mark the position where the shell and the web are bonded on the pressure side and suction side of the blade respectively to determine the evaluation range of the thickness nondestructive test.

[0028] 3) According to the material of the blade at the designated position in step 2), make two materials of the same fiberglass material as the blade shell...

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Abstract

The invention discloses a method for testing bonding defects of a shell of a wine turbine blade and a web plate by using ultrasonic nondestructive testing means. According to the method, the defect of a hungry joint existing in the bonding process of the shell of the wine turbine blade and the web plate can be effectively detected. The method comprises the following parts: detection of preparation work, detection of an implementation process, and a defect judgment criterion. The wine turbine blade is detected by using an ultrasonic flaw detection technology; the internal acoustic reflection situation of the blade can be objectively reflected; and the internal defects of the blade can be effectively judged.

Description

Technical field [0001] The invention relates to the technical field of wind power generation in the mechanical industry, and in particular to a non-destructive detection method for bonding defects between a wind turbine blade shell and a web. Background technique [0002] With the continuous improvement of the single-machine power of wind turbines, the wind power blades are also getting larger and larger, and the accompanying material, technological level and quality reliability requirements are also getting higher and higher. Composite materials are widely used in wind turbine blades due to their high specific strength, specific rigidity, good fatigue resistance and corrosion resistance. Because there are many factors that affect the structural integrity of composite materials, small differences in many process parameters can cause defects, which make the product quality present obvious discreteness. These defects seriously affect the mechanical properties and integrity of the b...

Claims

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Application Information

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IPC IPC(8): G01N29/04
Inventor 李苏威石可重
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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