Features of load and wear of main propulsion devices on sea-going ships with piston combustion engines and their impact on changes in technical states of the systems

• Autorzy: Girtler J.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the specificity of operation of propulsion systems of seagoing ships which causes the need to control the load on them, especially on their engines called main engines. The characteristics of the load on the propulsion systems, especially on the main engines as well as on the shaft lines and propellers driven by the engines, along with the process of wear in tribological joints (sliding tribological systems) of the machines have been described herein. Using examples of typical types of wear (both linear and volumetric) for the tribological systems of this sort, interpretation of states of their wear has been provided with regards to the wear levels defined as acceptable, unacceptable and catastrophic. The following hypotheses have been formulated: 1) hypothesis explaining necessity to consider the loads on the systems under operation as stochastic processes; 2) hypothesis explaining a possibility of considering the processes as stationary; and 3) hypothesis explaining why it can be assumed that a given technical state of any tribological system can be considered as dependent only on the directly preceding state and stochastically independent of the states that existed earlier. Accepting the hypotheses as true, a four-state continuous-time semi-Markov process has been proposed in the form of a model of changes in condition of a propulsion system (PS) of any ship. The model includes the most significant states affecting safety of a ship at sea, such as: s0 – PS ability state, s1 – PS disability state due to damage to the main engine (ME), s2 – PS disability state due to damage to the shaft line (SL) and s3 – PS disability state due to damage to the propeller (P). Probability of occurrence (changes) of the states has also been demonstrated.

Słowa kluczowe

EN

load; reciprocating internal combustion engine; seagoing ship; propulsion system of a ship; wear

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2017
• Tom: nr 4
• Strony: 57--66
• Opis fizyczny: Bibliogr. 47 poz., rys.

Twórcy

autor

Girtler J.

• Gdańsk University of Technology, 11/12 Narutowicza St., 80 - 233 Gdańsk Poland

Bibliografia

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• 41. Girtler J.: Identification of operational conditions of crankshaftpiston systems of ship main engines (in Polish). A stage report on realization of the project No. N N509 494638 financed by MNiSW. The author’s research project on: „Decision – making control over operation of crankshaft-piston systems of main propulsion engines on sea-going ships with application of technical diagnostics and taking into account safety and protection of the environment”. Project’s superviser: J. Girtler. Prace badawcze No. 1/10/PB. Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology, 2010.
• 42. Girtler J., Łosiewicz Z.: Analysis of diagnostic model of engine crankshaft-piston systems , adjusted to needs of control of operation process of the engines in the aspect of ship and environment safety (in Polish). A stage report on realization of the project No. N N509 494638 financed by MNiSW. The author’s research project on: „Decision – making control over operation of crankshaft-piston systems of main propulsion engines on sea-going ships with application of technical diagnostics and taking into account safety and protection of the environment”. Project’s superviser: J. Girtler. Prace badawcze No. 6/10/PB. Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology, 2010.
• 43. Girtler J., Fydrych J.: Analysis and assessment of usability of the worked out diagnostic system for ship main engines, intended for control of operation process of such engines in the aspect of assuring safety of ships and marine environment (in Polish). The author’s research project on: „Decision – making control over operation of crankshaft-piston systems of main propulsion engines on sea-going ships with application of technical diagnostics and taking into account safety and protection of the environment”. Project’s superviser: J. Girtler. Prace badawcze No. 4/12/PB. Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology, 2012.
• 44. Korczewski Z.: Determination of principles for verification of diagnostic model and its possible modification for needs of rational control over operation process of engines (in Polish). The work done within frames of the author’s research project titled: „Decision – making control over operation of crankshaft-piston systems of main propulsion engines on sea-going ships with application of technical diagnostics and taking into account safety and protection of the environment”. Project’s superviser: J. Girtler. Prace badawcze No. 28/11/PB. Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology, 2011.
• 45. UP RP Patent No. 211232 issued for the invention: „The stand for preparation of classifiers for identification failure states of bearings, especially these in self-ignition engines, based on application of acoustic emission to form diagnostic signal “ (in Polish) Its authors: Jerzy Girtler, Wojciech Darski, Ireneusz Baran, Marek Nowak, Artur Olszewski, Jerzy Schmidt, Gdańsk University of Technology. The patent was worked out as a result of realization of the authors’ research project No. N504 043 31/3480 financed by MNiSzW.
• 46. UP RP Patent No. 224702 issued for the invention: „ The diagnostic system adjusted to identification of technical state of sleeves of slide bearings of piston combustion engines, based on application of acoustic emission to form diagnostic signal “ (in Polish). Its authors: Girtler J., Darski W., P. Darski, Gdańsk University of Technology. The patent was worked out as a result of realization of the authors’ research project No. N N509 494638 financed by MNiSzW.
• 47. UP RP Patent No. 223940 issued for the invention: „ The diagnostic system adjusted to identification of technical state of controllable pitch screw propeller for the needs of its operation control, especially on sea-going ships “ (in Polish). Its authors: Girtler J., Darski W., Frydrych J., Gdańsk University of Technology. The patent was worked out as a result of realization of the authors’ research project No. N N509 494638 financed by MNiSzW.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)