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    Wyświetlanie 1-4 z 4
    Tytuł:
    Vibration diagnostics of marine gas turbine engines
    Autorzy:
    Grządziela, A.
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/244616.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dynamics
    gas turbines
    rotor vibration
    Opis:
    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.
    Źródło:
    Journal of KONES; 2011, 18, 1; 157-162
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An application of order tracking procedure for diagnosis technical state of rotor system in shut - down process
    Autorzy:
    Grządziela, A.
    Kluczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/242634.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dynamics
    vibration
    gas turbines
    rotor vibration
    shut-down process
    order analysis
    Opis:
    Vibration diagnostic tests of marine gas turbine engines are performed as a research of on-line and off-line types. On-line systems generally monitored one or two vibration symptoms, which asses the limited and/or the critical values of parameters and they, potentially, can warn and/or shutdown engines. Off-line Systems are usually used for vibration analysis during non-steady state of work. The paper presents a new method of vibration diagnostics of rotor bearing system of gas turbine systems. The study assumes implementation of characteristics of vibration signals during the shut-down process of the rotor. The shut-down process is non-stationary so the studies used the order tracking procedure. Identified orders constitute individual characteristics as a function of changes of the rotational speed and shut-down process time. These allow the observation of changes in the support rigidity of the rotor in the frequency domain and change the bearing resistance torque as a function of changing time of the shut-down process. The resulting characteristics are as reference fingerprints for each of the rotors. Changes in the characteristics of the primary evidence of the processes of wear. Changes in the stiffness of rotor supports make change the amplitude of orders and frequency of the resonance signals observed in the frequency domain - decreasing rotational speed. The bearing wear results in changes in the shut-down time between successive intervals of characteristic rotational speed and the total shut-down time.
    Źródło:
    Journal of KONES; 2013, 20, 1; 111-118
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnosing of rotor systems of marine gas turbine engines in nonstationary states
    Autorzy:
    Grządziela, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246906.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dynamics
    gas turbines
    rotor vibration
    run-up process
    Opis:
    Vibration tests of marine gas turbine engines are performed as researches on-line and off-line types. Systems on-line type generally monitored one or two vibration symptoms, which asses the limited and/or the critical values of parameters and they potentially can warn and/or shutdown engines. Systems off-line types are usually used for vibration analyzing during non-steady state of work. The paper presents comparison of different methods of analyzing vibration symptoms measured under run-up and shut-down processes of marine gas turbine engines. Results of tests were received on gas turbine engine DR76 type of the COGAG type propulsion system. The engine was not fitted with vibration monitoring system. Main goal of researches was qualified of help fulness 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). Second purpose was estimation of the possibility of implementation presented methods of vibration analyses of gas turbine engines for on-line monitoring system. Application of periodical or on-line diagnostic procedures makes it possible to operate ship propulsion systems in accordance with their current technical state. The realization of the investigations made reliable verification of the investigation results possible.
    Źródło:
    Journal of KONES; 2010, 17, 2; 121-127
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnostics gas turbine rotors in non stationary states
    Diagnozowanie układów wirnikowych silników turbinowych w stanach nieustalonych
    Autorzy:
    Grządziela, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/327976.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    dynamika
    drgania
    wirnik
    proces rozruchu
    proces wybiegu
    dynamics
    gas turbines
    rotor vibration
    run-up processes
    shutdown processes
    Opis:
    Vibration tests of marine gas turbine engines are performed as research of on-line and off-line types. On-line Systems generally monitored one or two vibration symptoms, which asses the limited and/or the critical values of parameters and they, potentially, can warn and/or shutdown engines. Off-line Systems are usually used for vibration analysis during non-steady state of work. The paper presents comparison of different methods of analysis of vibration symptoms measured under run-up and shut-down processes of marine gas turbine engines. Results of tests were recorded on gas turbine engine DR76 type of the COGAG type propulsion system. Main goal of the research was qualified on helpfulness and unambiguous result, from 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 Base Diagnosing System. Second purpose of the paper was the estimation of the possibility of usage those analysis methods of gas turbine engines for on-line monitoring systems.
    Badania drganiowe okrętowych turbinowych silników spalinowych są realizowane według procedur typu on-line i off-line. Systemy monitorują najczęściej jeden lub dwa parametry drganiowe, których przekroczenie skutkuje wywołaniem sygnałów alarmowych lub zatrzymaniem silnika. Systemy off-line są zwykle dedykowane dla analiz w stanach nieustalonych. Referat przedstawia porównanie różnych metod diagnozowania realizowanych podczas procesu rozruchu oraz wybiegu silnika turbinowego. Wyniki badań są efektem testów na silnikach DR 76 użytkowanych w kombinowanym układzie napędowym COGAG. Podstawowym celem badań była ocena przydatności metod pomiaru i analizy z wykorzystaniem synchronizmu sygnałów, śledzenia rzędów i autośledzenia. Kolejnym celem badań była ocena możliwości zastosowania proponowanych metod w badaniach typu on-line.
    Źródło:
    Diagnostyka; 2011, 3(59); 41-46
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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