Recent Patents on Oil Analysis Technologies of Mechanical Equipment
Sun Di, Wei Haijun and Liao Haifeng
Affiliation: Marine Engineering College, Dalian Maritime University, Dalian, China, 116026 & Merchant Marine College, Shanghai Maritime University, Shanghai, 200135, P.R. China.
Mechanical equipment condition monitoring and fault diagnosis techniques generally contain vibration signal,
sound signal, temperature signal detection and lubricating oil analysis. Oil analysis provides a nondestructive testing diagnostic
method for predicting possible impending failure and for avoiding catastrophic failures long before they occur and
furthermore tends to determine the frequencies of oil changes and the remaining life of oil with the consequence of reducing
maintenance costs and downtime. Oil analysis can be sorted into two categories, namely physical and chemical analysis
and WDA analysis. An overview of various normal oil analysis technologies has been addressed. Some real cases resolving
engineering problems with oil analysis technology are presented in this review. Fifty one various recent patents
were reviewed in this paper on oil analysis technologies and the latent technology developments of oil analysis over the
past decade were stated here. Those to some extent show evolution trends concerning latent oil analysis technology and
expect future developments in this domain which is on-line and web-based remote intelligence oil analysis monitoring
system and information fusion technology.
Keywords: Development trends, ferrography analysis, oil analysis technology, physical and chemical analysis, spectrum analysis, WDA (Wear debris analysis)
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