Possibilities of using the free-end of crankshaft in diagnosis of slow speed marine diesel engines

• Autorzy: Drzewieniecki J.
• Języki publikacji: EN

Abstrakty

EN

In this article there are discussed possibilities in diagnosis of large marine diesel engines by utilization the freeend of crankshaft in gaining information about engine load in particular cylinders on the basis of course of crankshaft’s transient rotational speed overlapped by torsional vibration. There is defined and calculated crankshaft’s transfer function for torsional vibration being crankshaft’s response to exciting force caused by crank pin efforts. There is presented methodology of reconstruction of crank pin efforts’ course on the basis of calculated transfer function and measured in any given condition course of crankshaft’s speed. There are indicated that similarities between courses of torsional vibration in time and frequency domain for slow and medium speed marine diesel engines will allow to apply the presented methodology of reconstruction of crank pin efforts’ course in large marine diesel engines.

Słowa kluczowe

EN

diagnostics; marine diesel engine; crankshaft; torsional vibration; transfer function

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2011
• Tom: Vol. 6, no 2
• Strony: 73--82
• Opis fizyczny: Bibliogr. 5 poz., rys., tab.

Twórcy

autor

Drzewieniecki J.

• Maritime University of Szczecin Department of Condition Monitoring & Maintenance of Machinery ul. Podgórna 52/53, 70-205 Szczecin tel.: [phone], fax: [phone],

Bibliografia

• [1] Connolly F., Direct Estimation of Cyclic Combustion Pressure Variability Using Engine Speed Fluctuations in an Internal Combustion Engine, SAE paper 940143, SP-1029: Electronic Engine Controls 1994.
• [2] Drzewieniecki J., Opracowanie miar drgań wzdłużnych wału korbowego średnioobrotowego silnika okrętowego jako symptomu diagnostycznego niezależnego od obciążenia. (Evaluation of crankshaft’s axial vibration measures in marine medium speed engine as an independent on load diagnostic symptom), Doctor’s dissertation, Politechnika Szczecińska, Wydział Techniki Morskiej 2002.
• [3] MAN B&W: Alpha Lubricator System. Operation Manual MC Engines, MAN B&W Diesel A/S, Copenhagen 2003.
• [4] MAN B&W: The Intelligent Engine. PMI System, Cylinder Pressure Analyzer, MAN B&W Diesel A/S, Copenhagen 2000.
• [5] Taraza D., Henein N.A., Determination of the Gas-Pressure Torque of a Multicylinder Engine from Measurements of the Crankshaft's Speed Variation, SAE paper 980164, SP-1356, Electronic Engine Controls 1998.