Abstract
The article draws attention to the problems of maintaining fuel injection pumps of marine diesel engines in the conditions of the use of residual fuels in which the quality is steadily deteriorating. The analysis of tribological processes occurring in hydraulic precision pairs of fuel injection pumps, such as a barrel-plunger, is presented. Problems occurring regarding the operation of injection pumps and the possibilities of their avoidance on board are discussed. The means of condition monitoring, including the application of thermography methods, are characterized. The authors have done research concerning diagnosing injection systems of high and medium power engines by using acoustic emission (AE) signals. The experiment results obtained with the use of acoustic emission and wavelet analysis confirmed the dependency of the frequency components contained in the acoustic emission signal on the condition state of the injector pumps’ tribological pair.
Highlights
According to the literature engine manufacturer’s service information and the authors’ own experience [1,2,3,4] the number of incidents involving the fuel injection pump (FIP) and its precision pair barrel-plunger (B-P) installed in marine 2-strokes, crosshead, slow-speed diesel engines is steadily increasing
Aneffective effectiveonboard onboard management system minimize and significantly risk of break-down caused by the failure of elements due to jammed/sticking fuel/VIT
Racks and/or a engine break-down caused by the failure of FIP elements due to jammed/sticking fuel/VIT racks seized precision pair if it is implemented and followed at all times
Summary
According to the literature engine manufacturer’s service information and the authors’ own experience [1,2,3,4] the number of incidents involving the fuel injection pump (FIP) and its precision pair barrel-plunger (B-P) installed in marine 2-strokes, crosshead, slow-speed diesel engines is steadily increasing. This has a large impact on the performance of ships and engines operating at low loads due to operational and economic reasons. Methods of FIP diagnosis that can be used as a proactive tool in condition monitoring
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