基于叶端定时的转子碰摩故障诊断方法

doi:10.7527/S1000-6893.2021.25031

Abstract

Abstract: Aero-engine rotor static rub impact will not only affect the bending vibration of the rotor, but also cause obvious torsional vibration of the rotor. Therefore, rub impact fault can be diagnosed by monitoring the changes of torsional vibration. Here, a rub impact fault diagnosis method based on improved blade tip timing is proposed. The rub impact fault diagnosis and early warning is carried out by monitoring the change of rotor torsional vibration. To solve the problem of inaccurate measurement results of torsional vibration caused by the blade spacing error, a correction method is proposed considering the uneven spacing error caused by blade assembly and blade vibration. The experiment results show that the measurement results of the improved blade tip timing method are consistent with those of the encoder, and can accurately monitor the speed fluctuation caused by rub impact. The correctness of the improved method and the practicability of the improved blade end timing method in rub impact fault diagnosis are verified.

Key words: blade tip timing, rotor-stator contact, torsional vibration, rotor angular deceleration, fault diagnosis

CLC Number:

WANG Weimin, CHEN Ziwen, ZHANG Xulong, CHEN Kang. Fault diagnosis method of rotor rub impact based on blade tip timing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(8): 625031-625031.

References

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Fault diagnosis method of rotor rub impact based on blade tip timing

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