Flaw detection technology for bearing box
A kind of bearing box, technology, applied in the direction of material magnetic variables, etc., can solve the problems of intolerance, corrosion and rust, high operating conditions, etc., and achieve the effect of reducing construction conditions, prolonging service life, and ensuring accuracy
Inactive Publication Date: 2011-08-17
DALIAN YINLING SCI & TECH DEVCO
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Problems solved by technology
At present, liquid penetrant flaw detection technology is mostly used for non-destructive surface flaw detection of bearing housings. Liquid penetrant liquid needs to be tested under high temperature conditions, which requires high operating conditions, and the flaw detector remains on the metal to be tested, which is easy to cause corrosion. rust, not durable
Method used
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Experimental program
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Effect test
Embodiment Construction
[0007] The technical solution adopted in the present invention is to first use the eddy current detector to act on the bearing box through the alternating magnetic field, and when the crack is automatically detected, a defect signal will be generated, and all the welding cracks with defects will be detected; A certain amount of fluorescent powder is added to the flaw detection penetrant to accurately locate the welding cracks found. Then heat the defect where the crack is found, so that the gas chlorosilane and high-purity hydrogen react under high temperature conditions, the chlorosilane is cracked into hydrogen chloride and silicon carbide, and the silicon carbide is deposited on the surface of the defect to form a silicon carbide layer, so that the outer layer of the defect surface is obtained repair.
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The invention discloses a flaw detection technology for a bearing box, which is characterized by comprising the following steps: firstly performing large-area surface detection by using rapid vortex; detecting a welding seam again by adopting a coloring fluorescent flaw detection technology so as to detect out surface defects of the welding seam after welding; carrying out silicon carbide surface processing on the discovered defect part so that the surface defects of the bearing box can be repaired, thus the quality of the repaired bearing box conforms to the requirements of the quality standard. The flaw detection technology provided by the invention is simple to operate and has the characteristics of high working efficiency, low construction cost, corrosion resistance and durability; and by the flaw detection technology, the precision of the manufactured bearing box is ensured, the service life of a bearing is prolonged, the performance of a whole electric generating set is improved, and the detection cost is lowered; and the technology is a new technology with popularization value.
Description
technical field [0001] The invention relates to the technical field of flaw detection, in particular to a flaw detection technology of a bearing box connected with a low-pressure cylinder in a thermal power generating set. Background technique [0002] The invention relates to a flaw detection technology of a bearing box. The bearing box is an important part of the thermal power generation unit. Before the heat treatment of the bearing box, it is necessary to perform flaw detection on the welded seam after welding. At present, liquid penetrant flaw detection technology is mostly used for non-destructive surface flaw detection of bearing housings. Liquid penetrant liquid needs to be tested under high temperature conditions, which requires high operating conditions, and the flaw detector remains on the metal to be tested, which is easy to cause corrosion. Rust, not durable. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the ...
Claims
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Inventor 高峻吴争杰张晓亮
Owner DALIAN YINLING SCI & TECH DEVCO
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