Analysis of middle bearing failure in rotor jet engine using tip-timing and tip-clearance techniques
The reported problem is the failure of the middle bearing in an aircraft rotor engine. Tip-timing and tip-clearance and variance analyses are carried out on a compressor rotor blade in the seventh stage above the middle bearing. The experimental analyses concern both an aircraft engine with a middle...
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| Published in: | Mechanical systems and signal processing Vol. 76-77; pp. 213 - 227 |
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01-08-2016
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| Abstract | The reported problem is the failure of the middle bearing in an aircraft rotor engine. Tip-timing and tip-clearance and variance analyses are carried out on a compressor rotor blade in the seventh stage above the middle bearing. The experimental analyses concern both an aircraft engine with a middle bearing in good working order and an engine with a damaged middle bearing. A numerical analysis of seventh stage blade free vibration is conducted to explain the experimental results. This appears to be an effective method of predicting middle bearing failure. The results show that variance first increases in the initial stages of bearing failure, but then starts to decrease and stabilize, and then again decrease shortly before complete bearing failure.
•In this paper we proposed new methods to diagnose the middle bearing failure of aircraft engine using the tip-timing and tip-clearance methods.•The reported problem is the failure of the middle bearing in an aircraft rotor engine. Tip-timing and tip-clearance and variance analyses are carried out on a compressor rotor blade in the seventh stage above the middle bearing. The experimental analyses concern both an aircraft engine with a middle bearing in good working order and an engine with a damaged middle bearing and was carried out in the Air Force Institute in Warsaw.•The original contribution of this paper is a methodology of assessing bearing health using tip-timing, tip-clearance and variance techniques. |
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| AbstractList | The reported problem is the failure of the middle bearing in an aircraft rotor engine. Tip-timing and tip-clearance and variance analyses are carried out on a compressor rotor blade in the seventh stage above the middle bearing. The experimental analyses concern both an aircraft engine with a middle bearing in good working order and an engine with a damaged middle bearing. A numerical analysis of seventh stage blade free vibration is conducted to explain the experimental results. This appears to be an effective method of predicting middle bearing failure. The results show that variance first increases in the initial stages of bearing failure, but then starts to decrease and stabilize, and then again decrease shortly before complete bearing failure. The reported problem is the failure of the middle bearing in an aircraft rotor engine. Tip-timing and tip-clearance and variance analyses are carried out on a compressor rotor blade in the seventh stage above the middle bearing. The experimental analyses concern both an aircraft engine with a middle bearing in good working order and an engine with a damaged middle bearing. A numerical analysis of seventh stage blade free vibration is conducted to explain the experimental results. This appears to be an effective method of predicting middle bearing failure. The results show that variance first increases in the initial stages of bearing failure, but then starts to decrease and stabilize, and then again decrease shortly before complete bearing failure. •In this paper we proposed new methods to diagnose the middle bearing failure of aircraft engine using the tip-timing and tip-clearance methods.•The reported problem is the failure of the middle bearing in an aircraft rotor engine. Tip-timing and tip-clearance and variance analyses are carried out on a compressor rotor blade in the seventh stage above the middle bearing. The experimental analyses concern both an aircraft engine with a middle bearing in good working order and an engine with a damaged middle bearing and was carried out in the Air Force Institute in Warsaw.•The original contribution of this paper is a methodology of assessing bearing health using tip-timing, tip-clearance and variance techniques. |
| Author | Szczepanik, R. Rokicki, E. Rzadkowski, R. Piechowski, L. |
| Author_xml | – sequence: 1 givenname: R. surname: Rzadkowski fullname: Rzadkowski, R. email: z3@imp.gda.pl organization: Aeroelstic Department, Institute of Fluid Flow Machinery, Polish Academy of Sciences, Gdansk, Poland – sequence: 2 givenname: E. surname: Rokicki fullname: Rokicki, E. organization: Department of Aircraft Engines, Air Force Institute of Technology, Warszawa, Poland – sequence: 3 givenname: L. surname: Piechowski fullname: Piechowski, L. organization: Aeroelstic Department, Institute of Fluid Flow Machinery, Polish Academy of Sciences, Gdansk, Poland – sequence: 4 givenname: R. surname: Szczepanik fullname: Szczepanik, R. organization: Department of Aircraft Engines, Air Force Institute of Technology, Warszawa, Poland |
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| Cites_doi | 10.1115/77-GT-66 10.1115/1.3446271 10.1016/0022-460X(85)90390-6 10.1006/mssp.2002.1489 10.1115/1.1596552 10.1109/AERO.2001.931405 10.1007/BF02327002 10.1038/222475a0 10.2514/6.1985-1473 10.1016/0020-7403(95)00116-6 10.1109/ICPHM.2011.6024352 10.1088/0957-0233/11/7/301 10.1006/jsvi.1997.1031 10.2514/6.1985-1472 10.1016/0022-460X(84)90595-9 10.1016/j.ymssp.2006.07.015 10.1109/TE.2002.808234 10.1016/B978-0-444-87450-4.50143-0 10.1109/MED.2008.4602112 10.1115/1.483198 10.1016/S0924-4247(04)00482-0 10.1016/j.ymssp.2004.03.008 10.1006/jsvi.2000.2864 10.1115/99-GT-310 10.2514/6.1999-2134 |
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| SubjectTerms | Aerospace engines Aircraft Aircraft engine Bearing Blades Failure Gas turbine engines Mechanical systems Rotors Tip-clearance Tip-timing |
| Title | Analysis of middle bearing failure in rotor jet engine using tip-timing and tip-clearance techniques |
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