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Conditions of usage analisys of the two-stroke, slow-running, high power rating, main engines and the causes and effects of the triboilogical systems damage

Łosiewicz Z.

Journal of Polish CIMAC

2014

Vol. 9, no 3

43--58

This work justifies the need for further research, both laboratory and real-time usage, on improving currently operating diagnostic systems adapted to monitor ship's two-stroke, slow-running high power rating main engines in order to prevent the damage of the main tribological systems of the engines, at least these mentioned in the paper. The randomness of the variability of the load of the engines is highlighted. It is pointed that the load should be taken under consideration during the period of usage of the engines as random processes, but the optional period of time of usage as random variables. The models of these processes which are necessary to the research are offered to be elaborated with the use of Semi-Markov model theory. The rationality of the proposition is pointed out with two hypotheses. The first explains the relation between the mechanical load QM(t) and the thermal load QC(t) of the engines. The second - the existence of the stochastic linear relation between the load QM(t) and QC(t) of the engines and the wear Z(t) of their main tribological systems in such relation, that the value of the coralation coefficient rqz=1. In order to simplify the actions made to improve the currently used diagnostic systems of the engines mentioned; the most relevant description according to the author of chosen tribological system damage is given. The conditions of usage which favor the described damage are also characterized.