Affiliation:
1. Mechanical Engineering College, Xi’an Shiyou University, Xi’an 710065, China
Abstract
According to the characteristics of the rotor system in an aero-engine and the vibrational test requirements of the aero-engine ground test, suitable vibration measurement sensors and test positions were selected. The vibration signals at the casings for the compressor and turbine of a twin-spool turbo-jet engine were collected under the states of maximum power and afterburning respectively, and the power spectrum analysis was carried out to determine the positions and causes of vibration. Furthermore, methods and preventive measures for eliminating vibration have been proposed. The results indicated that the main rotor vibration excited by mass imbalance in the twin-spool turbo-jet engine was significant. Rotor spindle misalignment or rotor radial stiffness unevenness also induced the vibration. The aerodynamic pulse vibration formed by the rotor blades of the first stage of the low pressure compressor was large, and rub induced vibration fault may occur at the turbine rotor seals. Based on the power spectrum analysis technology, the rotor system faults information including the type, position, and the degree can be quickly identified, and useful attempts and explorations have been made to reduce the vibration faults of the twin-spool turbo-jet engine.
Funder
Natural Science Foundation of Shaanxi Province of China
Program of State Key Laboratory for Strength and Vibration of Mechanical Structures
Reference22 articles.
1. Tao, C., Zhong, P., Wang, R., and Nie, J. (2000). Failure Analysis and Prevention for Rotor in Aeroengine, Defense Industry Press. (In Chinese).
2. Zhang, Y., Song, H., Yang, C., and Zhao, W. (2017, January 15–16). The engine fuel system fault analysis. Proceedings of the International Conference on Materials Science, Energy Technology, and Power Engineering, Hangzhou, China.
3. Daponte, P., Lamonaca, F., Picariello, F., Riccio, M., Pompetti, L., and Pompetti, M. (2017, January 21–23). A measurement system for testing light remotely piloted aircraft. Proceedings of the 2017 IEEE International Workshop on Metrology for AeroSpace: MetroAeroSpace, Padua, Italy.
4. A PLL-based resampling technique for vibration analysis in variable-speed wind turbines with PMSG: A bearing fault case;Pezzani;Mech. Syst. Signal Process.,2017
5. Rolling element bearing fault diagnosis under slow speed operation using wavelet de-noising;Mishra;Measurement,2017