Article

Article title EXPERIMENTAL STUDIES OF RAILS MAGNETIZATION SYSTEM USING PERMANENT MAGNETS
Authors N.I. Merezhin, M.N. Maksimov, A.A. Legin
Section SECTION III. TECHNICAL DEVICES. MODELING AND ANALYSIS
Month, Year 11, 2014 @en
Index UDC 621.1
DOI
Abstract For a more reliable detection of defects in rails, the system of rails magnetization for mag-netic channels of flaw detector car and defectoscopic railcars is designed. The system of rails magnetization, which is designed and manufactured unlike other available solutions containing powerful electromagnets DC, contains modern composite permanent magnets of great strength. Using of permanent magnets substantially reduce the weight and dimensions of the magnetization system. Furthermore, the developed system does not consume electric energy. All this in total lead to substantial savings in the operating costs. The tests results of the developed magnetization system in static and dynamic conditions are given. Static tests were carried out on the test bench to determine the optimum design parameters of the system. The influence of parameters such as thickness of the yoke, the length of the magnetizing system, the number of magnets and their relative position on each pole was investigated. The tests carried out to optimize the design allowed the magnetization system on the main technical indicators: the magnetizing force, weight and dimensions. Dynamic tests were carried out in the magnetic flaw detector car together with the existing magnetization system on the test section of the railway stacked defects. Tests have shown the effective work of the developed system magnetization. Despite the significantly smaller size, the developed system allows magnetization system strongly magnetized rail, which in turn leads to greater sensitivity of the whole magnetic flaw detector car and improve the detectability of defects.

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Keywords Defect; defect inspection; magnetic particle inspection; the system magnetization; automated defect detection; flaw detector car.
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