In Situ Eddy-Current Testing on Low-Pressure Turbine Blades of Aircraft Engine

    Volume 40, Issue 4 (July 2012)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 1 July 2012

    Page Count: 4


    Qi, Gong-Jin
    Beijing Aeronautical Technology Research Center, Beijing,

    Lei, Hong
    Beijing Aeronautical Technology Research Center, Beijing,

    Fu, Gang-Qiang
    Beijing Aeronautical Technology Research Center, Beijing,

    Jing, Peng
    Beijing Aeronautical Technology Research Center, Beijing,

    Lin, Jun-Ming
    Eddysun (Xiamen) Electronic Co., Ltd., Xiamen,

    (Received 19 September 2010; accepted 20 March 2012)

    Abstract

    To realize in situ testing on low-pressure turbine blades of aircraft engines, eddy-current testing was studied through probe design, artificial defect sample testing, and practical field applications. The eddy-current probe was composed of a differential coil with dual magnetic cores, flexible spring steel strip, and elongating composite shank, which, respectively, provided high detection sensitivity on the turbine blade defect, appropriate contact between the probe and the curving blade surface, and adequate extent for the long distance of in situ inspection. Practical applications in engine turbine blades testing proved that the eddy-current probe successfully solved the in situ testing difficulties, including poor accessibility, limited detection space, and strong interference signals.


    Paper ID: JTE103388

    DOI: 10.1520/JTE103388

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    Title In Situ Eddy-Current Testing on Low-Pressure Turbine Blades of Aircraft Engine
    Symposium , 0000-00-00
    Committee E07