Analysis of diagnostic utility of instantaneous angular speed fluctuation of diesel engine crankshaft

• Autorzy: Dereszewski M. , Charchalis A. , Polanowski S.
• Języki publikacji: EN

Abstrakty

EN

Frequent crew rotation, a shorthand, and various levels of technical crew skills, are the facts with the ship-owners has to cope very often. Having the proper level of engine exploitation as a main objective is necessary to implement a constant engine monitoring system, in order to obtain quick and reliable diagnostic information. One cannot omit the financial aspect of monitoring system implementation, created by its price and costs of service. In this paper, the analysis of diagnostic utility of the signal deriving from a propulsion shaft fluctuation during its one revolution is presented. The angular speed of the shaft was measured using a laser sensor of torque meter ETNP-10. Diagnostic utility validation has been verified on a basis of combustion quality, in cylinders of two-stroke, turbocharged Marine Diesel Engine. Test was carried out on board of a container vessel during its sea passage. In order to evaluate the effectiveness of the method, the crew simulated engine’s malfunction by fuel injection cut-off in various cylinders (only one in the same time).The interference signals decomposition was carried out using the method of synchronous averaging and moving approximation with polynomial of 3rd exponent.

Słowa kluczowe

EN

two-stroke diesel engine diagnostics; diagnostics of combustion process; angular speed variation; angular acceleration; moving approximation

• 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: 2011
• Tom: Vol. 18, No. 1
• Strony: 123--128
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Dereszewski M.

autor

Charchalis A.

autor

Polanowski S.

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

Bibliografia

• [1] Polanowski, S., Studium metod analizy wykresów indykatorowych w aspekcie diagnostyki silników okrętowych, Zeszyty Naukowe AMW Nr 169 A (2007).
• [2] Geveci, M., Osburn, A.W., Franchek M.A., An investigation of crankshaft oscillations for cylinder health diagnostics, Mechanical Systems and Signal Processing 19(2005).
• [3] Charles, P., Sinha, J.K., Gu, F., Lidstone, L., Ball, A.D., Detecting the crankshaft torsional vibration of diesel engines for combustion related diagnosis, Journal of Sound and Vibration, 321 (2009).
• [4] Jianguo Yang, Lijun Pu, Zhihua Wang, Yichen Zhon, Xinping Yan, Fault detection in a diesel engine by analyzing the instantaneous angular speed, Mechanical Systems and Signal Processing 15(3) (2001).
• [5] Bonnier, J.S., Tromp, C.A.J., Klein Woud, J., Decoding torsional vibration recordings for cylinder process monitoring, CIMAC vol.3, 1998.
• [6] Gawande, S. H., Navale, L. G.,Nandgaonkar, M. R., Butala, L. S., Kunamala, S., Cylinder imbalance Detection of Six Cylinder DI Diesel Engine Using Pressure Variation, International Journal of Engineering Science and Technology,Vol.2(3), 2010.
• [7] Boguś, P., Grzeszczyk, R., Merkisz, J., Diagnostyka pokładowa silników wysokoprężnych z wykorzystaniem chwilowej analizy sygnałów, Pojazdy Szynowe, 1/2004.
• [8] Desbazeille, M., Randall, R.B., Guillet, F., El Badaoui, M., Hoisuard, C., Model-based diagnosis of large diesel engines based on angular speed variations of the crankshaft, Mechanical Systems and Signal Processing, Vol.24, issue 5, 2010.