Marine Engines and Auxiliary Machinery
Article: received: 20.07.2020; reviewed: 17.08.2020; accepted: 09.09.2020; financing: Maritime State University named after G.I. Nevelskoy.
DOI: http://www.dx.doi.org/10.24866/2227-6858/2020-4-5

Kicha G., Molokov N., Nadezkin A.

GENNADIY KICHA, Doctor of Engineering Sciences, Professor, Head of the department,
SPIN: 2469-6099, ORCID: 0000-0001-8298-9956, ResearcherID: W-2855-2017, ScopusID: 7801430889, kicha@msun.ru (corresponding author)
NIKOLAI MOLOKOV, Postgraduate Student, SPIN: 8121-6450, nikolaimolokov2014@mail.ru
ANDREY NADEZKIN, Doctor of Engineering Sciences, Professor, 
ResearcherID: V-8426-2017, nadezkin@msun.ru
Maritime State University named after G.I. Nevelskoy
Vladivostok, Russia

Selection centrifugal separator performance index for combined oil refining complexes of marine trunk diesel engines

Abstract: The prospects of combined cleaning of engine oil in ship trunk diesel engines using self-regenerating filters and separators are shown. This cleaning method is especially effective for high-powered, highly automated engines with low oil waste, operating on high-viscosity residual fuels. The importance of reliable protection of engine bearings from abrasive wear by full-flow oil filtration is substantiated. The centrifugal separator, operating according to the bypass scheme, effectively removes the finely dispersed phase of insoluble contaminants from the lubrication system, which ensures the functioning and increases the autonomy of the self-regenerating filter, and also slows down the aging of the lubricating oil. The necessity of selecting a separator according to the specific performance index, which ensures resource-saving oil use in the “diesel-fuel-oil-cleaning” system, is proved. The novelty of the experimental modeling of the efficiency of this system consists in evaluating the tribological indicators of the lubricating oil used in a marine diesel engine, reflecting the interaction of the links under consideration, on a laboratory motor unit, and establishing their connection with engine wear. The efficiency of the presented system is identified by the criterion of diesel wear, which makes it possible to use its computational and experimental model to determine the parameters of a centrifugal separator so that it meets the requirements of the considered interacting links. The model has been transformed into an expression for calculating the specific index of the separator performance per unit of engine power, which ensures minimum engine wear, permanent operation of the lubricating oil and an autonomous service life of a self-regenerating filter of at least 3 thousand hours. Full realization of the advantages of automated fine cleaning of engine oil by combining filtration and centrifugation, are applicable for marine diesel engines of medium and high speed with a capacity of up to 20 thousand kW.

Keywords: resource-saving oil use, self-regenerating filter, centrifugal separator, diesel wear, combined oil purification, lubrication system, separator performance index, optimization of oil separation

Contribution of the authors: the authors contributed equally to this article.
The authors declare no conflicts of interests.

See the reference in English at the end of the article