Vibration diagnostics of marine gas turbine engines

• Autorzy: Grządziela A. , Charchalis A.
• Języki publikacji: EN

Abstrakty

EN

Vibration tests of marine gas turbine engines are performed as researches on-line and off-line types. The paper presents analyses of both methods. Results of tests were received on three types of gas turbine engines operated in the COGAG type propulsion systems. The application of periodical diagnostic procedures or on-line monitoring systems makes it possible to operate ship propulsion systems in accordance with their current technical state. In the case of ship gas turbines the hourly period of scheduled maintenance or repair surveys is presently the criterion for maintenance time determination. The Finite Element Analysis (FEA) is used for confirmation actual technical state. FEA are used successfully for a wide range of problems and it may also be used for the modelling and analysis of rotor system. Presently, the diagnostics team uses FEA and the modelling of rotordynamics in conjunction with vibration analysis for detection and identification of unbalancing. Main goal of researches was qualified of helpfulness and unequivocally results received by methods of synchronous measurement, order tracking and auto tracking. All vibration symptoms were chosen from the methodology of the diagnosing gas turbine engines operated in the Polish Navy, called BDS (Base Diagnosing System). This element of BDS is accepted and used in all ships of Polish Navy, which are powered by the COGAG power plant. Second purpose of researches was estimation of the possibility of implementation presented methods of vibration analyses of gas turbine engines fornew, modern on-line monitoring system. The proposed diagnostics method makes it possible to determine the limiting value of vibration symptoms witch, if exceeded, indicates the inadmissible axis slope value between rotated machines of gas turbine engine and, more-over, it provides an unambiguous relationship between the value of symptom of rotors unbalance and the rotors rotational speed.

Słowa kluczowe

EN

dynamics; gas turbines; rotor vibration

• 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: 157--162
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Grządziela A.

autor

Charchalis A.

• Polish Naval Academy, Mechanical – Elelctrical Faculty Śmidowicza Street 69, 81-103 Gdynia, Poland. phone: [phone],

Bibliografia

• [1] Cioch, W., Jamro, E., Digital signal acquisition and processing in FPGAs, Przegląd Elektrotechniczny, Stowarzyszenie Elektryków Polskich, Main topics: Electrical measurements, R. 85, Nr 2, 2009.
• [2] Charchalis, A., Grzadziela, A., Diagnosing of naval gas turbine rotors with the use of vibroacoustic parameters, The 2001 International Congress and Exhibition on Noise Control Engineering. The Hague, pp. 268, The Netherlands 2001.
• [3] Downham, E., Woods, R., The rationale of monitoring vibration on rotating machinery, ASME Vibration Conference, Paper 71 - Vib - 96, Sept. 8 - 10, 1971.
• [4] Grządziela, A., Vibroacoustic method of shafting coaxiality assessment of COGAG propulsion system of a vessel, Polish Maritime Researches, No. 3, pp. 29-30, 1999.
• [5] Grządziela, A, Diagnosing of naval gas turbine rotors with the use of vibroacoustics parameters, Polish Maritime Researches, No. 3, pp. 14-17, Gdansk 2000.
• [6] Grządziela, A., Vibration analysis of unbalancing of marine gas turbines rotors, Mechanika, T. 23, Z. 2, pp. 187-194, 2004.
• [7] Krzyworzeka, P., Adamczyk, J., Cioch, W., Jamro, E., Monitoring of nonstationary states in rotating machinery, ITE, Krakow – Radom 2006.