Diagnostic of the piston rod gland’s failure of marine slow speed main engine

• Autorzy: Murawski L. , Van Doan D.

Identyfikatory

DOI

10.5604/01.3001.0010.3129

• Języki publikacji: EN

Abstrakty

EN

The article presents untypical diagnostic of the slow-speed, marine main engine. The engine was newly made-up and checking during mounting process and during sea trial. However, a leak under piston chamber of second cylinder along the piston rod appeared few days after the sea trial. The stuffing box exchange (with the piston rod’s regeneration) did not give expected results − the failure happened again. All geometrical and exploitation parameters was in acceptable range. The ship with main engine was fifth in the series of sister ships. The authors were asked for urgent expert opinion. Mix of different measurements was planned after formulation several hypothesis. Displacements of piston rod and cylinder, a stress level of main engine body, and vibrations level in different points of main engine was performed during short sea voyage. Not a single hypothesis can be considered as the main cause of the failure. It turns out, that a serious failure need not be caused by a single reason. According to snowball theory a sum of small effects, each of them affecting slightly the engine operation, can be a cause of serious failure. In the authors’ opinion, the failure was caused by a sum of relatively slight effects. The probably scenario of the failure process was enunciated. The recommendation for the engine project was formulated: some of the geometrical tolerances should be changed.

Słowa kluczowe

EN

marine propulsion system; slow-speed main engine; failure of piston-crankshaft system; diagnostic based on vibrations; displacement; stress level

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2017
• Tom: Vol. 24, No. 4
• Strony: 203--210
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Murawski L.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 81/87, 81-225 Gdynia, Poland tel..[phone], fax: [phone]

autor

Van Doan D.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 81/87, 81-225 Gdynia, Poland tel..[phone], fax: [phone]

Bibliografia

• [1] Charchalis, A., Grządziela, A., Diagnosing the shafting of alignment by means vibration measurement, ICSV Congress (electronic ver.), Garmisch-Partenkirchen 2000.
• [2] Deven, A., Marine Diesel Engines, August 17, pp. 45-48, 2004.
• [3] Matthias, A., Leo, S., Thomas, W., Sulzer TriboPack, Service Experience Report, Wärtsilä Corporation, May 2003.
• [4] Murawski L., Statyczno-dynamiczne charakterystyki pracy okrętowych układów napędowych i ich wpływ na drgania konstrukcji kadłubów i nadbudówek statków, Zeszyty Naukowe Instytutu Maszyn Przepływowych Polskiej Akademii Nauk w Gdańsku, Nr 542/1501/2006, 191 str., Gdańsk 2006.
• [5] Zhang, S., Yang, J., Li, Y., Li, J., Identification of bearing load by three section strain gauge method: Theoretical and experimental research, Measurement, Vol. 46, pp. 3968-3975, 2013.
• [6] Wärtsilä RT-flex96C and Wärtsilä RTA96C: Technology review and operation manual, Wärtsilä Corporation, June 2009.

Uwagi

PL

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