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    Wyświetlanie 1-4 z 4
    Tytuł:
    Measurements of maximum crankcase pressure for evaluation of the piston-rings- cylinder assembly
    Autorzy:
    Abramek, K.F.
    Abramek, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/242436.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    blow-by
    wear
    piston
    rings
    cylinder
    crankcase
    Opis:
    In the paper is presented statistical analysis of the effect of compression-ignition engine working time on the phenomenon of exhaust gas maximum pressure increase in crankcase and cylinder liner, pistons and rings wear. Characteristics of the crankcase maximum pressure variations were made for the start-up speed and for selected rotational speeds of the 359 compression-ignition engine crankshaft as well as micrometric measurements of the cylinder liner and pistons and rings wear. The engine was operated under normal traction conditions while pressure analyses and cylinder liner micrometric measurements were made, respectively, after an operational run of 204864 km. Crankcase exhaust gas maximum pressure measurements were made both with air vent open and closed for a cold (lubricating oil temperature of 285 K) and a warm engine (333 K). Basing on the analysis of obtained examination results, it was showed that crankcase exhaust gas maximum pressure measurement (also during the start-up) may be used for determination of engine run and life. Average and maximum wear and tear of cylinder liner s, maximum wear and tear of pistons in the perpendicular plane to the piston pin axis, dependency of maximum crankcase pressure in the function of operational mileage of a 359 engine for lubricating oil temperature of 333 K, dependency of maximum crankcase pressure in the function of operational mileage for lubricating oil temperature of 285 K are presented.
    Źródło:
    Journal of KONES; 2009, 16, 2; 23-28
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of selected models useful in ranking the root causes of explosions in marine engine crankcases
    Autorzy:
    Wiaterek, Daniel
    Chybowski, Leszek
    Powiązania:
    https://bibliotekanauki.pl/articles/24202590.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    marine diesel engine
    main engine
    prime mover
    crankcase explosion
    process modelling
    root causes
    Opis:
    This article aims to compile, describe and compare three different models taken from the literature describing the causes of explosions in the crankcases of marine engines. Each of the models has a different level of detail and was prepared with a different purpose. However, the same process, explosions in crankcases, was analyzed in all cases. A statistical evaluation of the frequency of events leading to explosions, a model built using failure mode and effects analysis (FMEA) and a model based on fault tree analysis (FTA) are described in turn. The FTA model drawn from the literature formed the basis for further analysis. Values of important measures of all elementary events of the fault tree were calculated using the Birnbaum reliability measure, Vesely-Fussell measure, Birnbaum structural measure, criticality measure and improvement potential. The percentage importance values of all events determined using these importance measures were compared. The results obtained from the application of each model were evaluated. The results of the models were compared with each other, and an approach using all three models supplemented with diversion analysis was proposed.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 72 (144); 77--85
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An engine room simulator as an educational tool for marine engineers relating to explosion and fire prevention of marine diesel engines
    Autorzy:
    Chybowski, L.
    Gawdzińska, K.
    Ślesicki, O.
    Patejuk, K.
    Nowosad, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/134930.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    engine room simulator
    education of engineers
    crankcase
    oil mist detection
    explosion protection
    exploitation safety
    Opis:
    The paper presents basic information about the prevention of explosions and fires in marine engines, with particular reference to explosions in the crankcase. It also discusses the possibility of using engine room simulators in educating marine officer engineers to prevent dangerous situations during actual marine diesel operation. Two scenarios have been shown that illustrate the developments in the case of improper operation of main bearings while the operation of an engine safety system is intact and there is lack/override/failure of safety systems. In scenario I the main engine shut down occurs and scenario II simulates an explosion in the crankcase.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 43 (115); 15-21
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing the topicality of the problem related to the explosion of crankcases in marine main propulsion engines (1972–2018)
    Autorzy:
    Wiaterek, Daniel
    Chybowski, Leszek
    Powiązania:
    https://bibliotekanauki.pl/articles/24202539.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    crankcase explosion
    fire safety
    human casualties
    marine diesel engine
    main engine
    marine engine
    prime mover
    main propulsion system
    incident
    accident
    internal combustion engine
    trunk piston engine
    crosshead engine
    Opis:
    The purpose of this paper is to present the results of a query aimed at assessing the validity of the topic of crankcase explosions prevention in the main marine engines. The study takes into account the engine type, engine manufacturer, ship’s age, accident severity, ship’s location at the time of the incident, and the share of fatal accidents in the analyzed population of crankcase explosions. One of the primary hazards associated with offshore and deep-sea ship operations – and primarily ship power plants – are fires and explosions that result in accidents and incidents with an average frequency of 60 days. This paper discusses the actuality of crankcase explosion hazards in the main propulsion engines of various types of sea vessels. The assessment was made based on the results of a statistical analysis of historical data from 1972 to 2018. The methodology consisted of three stages: (1) a selection query to obtain the source data, (2) analysis of the obtained results (data separation, extraction of additional information, and statistical analysis), (3) synthesis of the obtained information, and drawing conclusions about the numerical indicators describing the statistical distribution of individual events for the given evaluation criteria. The analysis showed that the risk of crankcase explosions affects ships of all ages – both in crosshead (31%) and trunk piston engines (61%) – and that the number of serious incidents (67%) remained constant over the investigated period. Half of all incidents occurred on vessels younger than 15 years old. 58% of explosions took place in engines of the most popular prime movers manufacturers. The probability that a main engine crankcase explosion will result in injury or death is 17.34%.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 71 (143); 33--40
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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