Evaluation of diagnostic information about marine engine work based on mesurement of the angular speed discrete value

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

Abstrakty

EN

The paper presents results of the experiment, aimed on finding the answer whether IAS (Instantaneous Angular Speed) and angular acceleration of the crankshaft is carrying information about quality of combustion in cylinder of the diesel engine. The experiment was carried out at laboratory stand in Gdynia Maritime University, equipped with diesel engine Sulzer 3AL 25/30 driving electro-generator. Sulzer 3AL 25/30 is three cylinder, medium speed, four stroke marine diesel engine, with maximum output 408 kW at 750 rpm. In order to evaluate of IAS utility for diagnosis of the engine, two kinds of malfunctions of engine's fuel system were simulated. First malfunction was fuel leakage from high-pressure line; the second was partly plugged injector's nozzle. Construction of high-pressure fuel pump enables to simulate fuel leakage. The level of leakage was controlled by simultaneous measurement of pressure in the high-pressure tube. For simulation of injector malfunction, the chocked one was installed in second cylinder. The engine was running at different loads, starting from around 25% up to 70% of nominal. The IAS was measured and recorded by the measurement system ETNP-10, which mode of operation was based on perforated disc mounted at the shaft and photo-optic sensor counting laser impulses. Results of all measurement were smoothed in order to eliminate a noise. Measurement results of fault condition were compared with healthy engine measurements and with results of in-cylinder pressure diagrams, in order to detect all deviation from normal condition.

Słowa kluczowe

EN

diagnostics; marine diesel engine; angular speed; photo optical signal; failure simulation

• 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: 2012
• Tom: Vol. 19, No. 2
• Strony: 121--128
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Dereszewski M.

autor

Charchalis A.

autor

Polanowski S.

• Gdynia Maritime University, Mechanical Faculty Morska Street 83, 81-225 Gdynia, Poland tel.: [phone],

Bibliografia

• [1] Bonnier, J. S., Tromp, C. A. J., Klein Woud, J., Decoding torsional vibration recordings for cylinder process monitoring, CIMAC Vol. 3, 1998.
• [2] Citron, S. J., O’Higgins, J. E., Chen, L. Y., Cylinder-by Cylinder Engine Pressure and Pressure Torque Waveform Determination Utilizing Speed Fluctuation. SAE Paper No 890486.
• [3] Dereszewski, M., Charchalis, A., Polanowski, S., Analysis of diagnostic utility of instantaneous angular speed of a sea going vessel propulsion shaft, Journal of KONES, Vol. 18, No. 1, 2011.
• [4] Geveci, M., Osburn, A. W., Franchek, M. A., An investigation of crankshaft oscillations for cylinder health diagnostics, Mechanical Systems and Signal Processing 19, 2005.
• [5] 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.
• [6] Desbazeille, M, Randall, R. B., Guillet, F., El Badaoui, M., Hoisnard, C., Model-based diagnosis of large diesel engines based on angular speed variations of the crankshaft, Mechanical Systems and Signal Processing 24, 2010.
• [7] Margaronis, I. E., The torsional vibration of marine diesel engines under fault operation of its cylinder, Forsh. Ingenieurw, No 1-2, 1992.
• [8] Polanowski, S., Studium metod analizy wykresów indykatorowych w aspekcie diagnostyki silników okrętowych, Zeszyty Naukowe AMW Nr 169 A, 2007.