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Dynamiczna niezawodność łopatek wirnikowych części gorącej turbiny
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Abstrakty
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.
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
Rocznik
Tom
Strony
75--88
Opis fizyczny
Bibliogr. 59 poz.
Twórcy
autor
- The Szewalski Institute of Fluid Flow Machinery, Fiszera 14, 0-952 Gdansk, Poland
autor
- The Szewalski Institute of Fluid Flow Machinery, Fiszera 14, 0-952 Gdansk, Poland
autor
- Air Force Institute of Technology, Mechanical Engineering Faculty, Ksiecia Boleslawa 6, 01-494 Warsaw, Poland
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-6ce5c256-2e7b-46fc-9e9d-be8147f891e7