On-line Diagnosis OF Marine Diesel Crankshaft Crack
BASED ON Magnetic Memory*
LI Han-lin, LIN Jin-biao, CAI Zhen-xiong, LU Yong
(Marine Engineering Institute, Jimei University, Xiamen, Fujian 361021)
Abstract: This paper summarized recent diagnosis methods of marine diesel crankshaft crack and introduced the fundamental principle, development and application of metal magnetic memory testing (MMMT) diagnosis technology. Compared with other methods, a scheme developed from MMMT combined with torsional signal to make on-line diagnosis of crankshaft crack was proposed, and the on-line diagnosis experimental platform of diesel was designed. Finally, comments were also made on the on-line MMMT method.
Keywords: marine diesel; crankshaft; crack; metal magnetic memory
1 Introduction
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