Dynamic reliability of rotor hot section turbine blade

• Autorzy: Szczepanik R. , Rokicki E. , Rzadkowski R.

Warianty tytułu

PL

Dynamiczna niezawodność łopatek wirnikowych części gorącej turbiny

• Języki publikacji: EN

Abstrakty

EN

Non-contact vibration measurements for turbine blades in an aircraft engines are hindered by the very low level of vibration amplitudes and high temperatures. Thus high-temperature inductive sensors and data processing algorithms were developed by the Air Force Institute of Technology (ITWL) for the diagnosis of gas turbines. These sensors are suitable for a long-term operation at temperatures typical for gas turbines and can withstand vibrations that occur during the operation of jet engines. Measurement results have shown that turbine blade vibrations in a jet engine achieve an average amplitude of approximately 0.1 mm in nominal conditions and usually no higher than 0.4 mm in resonance conditions. ITWL conditioning methods using technologically advanced circuits for triggering and data acquisition make it possible to measure blade tip deflection with an accuracy of over 0.01 %. The obtained resolution is sufficient to estimate blade vibration frequency and identify the vibration mode shape.

PL

Bezdotykowe pomiary drgań łopatek wirnikowych turbin silników lotniczych charakteryzują małe amplitudy drgań łopatek i praca w wysokich temperaturach czynnika roboczego. Wysokotemperaturowe czujniki indukcyjne i algorytmy przetwarzania danych opracowane przez autorów w Instytucie Technicznym Wojsk Lotniczych pozwalają na diagnostykę łopatek turbin gazowych. Czujniki mogą pracować długotrwale w temperaturach typowych dla turbin gazowych. Mierzą również drgania rezonansowe występujące podczas pracy silników odrzutowych. Opracowane układy kondycjonujące wspierane przez zaawansowane technologicznie układy wyzwalania i rejestracji pozwoliły na uzyskanie w metodzie tip-timingu dokładności pomiaru lepszej od 0,01%. Uzyskana dokładność pozwala na rozpoznanie form drgań łopatek i ułopatkowanego wieńca łopatek.

Słowa kluczowe

EN

turbine blades; reliability; tip timing

PL

łopatki wirnikowe; niezawodność; tip timing

• Wydawca: Wydawnictwo Naukowe Instytutu Technologii Eksploatacji - Państwowego Instytutu Badawczego
• Czasopismo: Scientific Problems of Machines Operation and Maintenance
• Rocznik: 2012
• Tom: Vol. 47, nr 1
• Strony: 75--88
• Opis fizyczny: Bibliogr. 59 poz.

Twórcy

autor

Szczepanik R.

• The Szewalski Institute of Fluid Flow Machinery, Fiszera 14, 0-952 Gdansk, Poland

autor

Rokicki E.

• The Szewalski Institute of Fluid Flow Machinery, Fiszera 14, 0-952 Gdansk, Poland

autor

Rzadkowski R.

• Air Force Institute of Technology, Mechanical Engineering Faculty, Ksiecia Boleslawa 6, 01-494 Warsaw, Poland

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