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

WANG Weimin; CHEN Ziwen; ZHANG Xulong; CHEN Kang

doi:10.7527/S1000-6893.2021.25031

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2022 , Vol. 43 >Issue 8: 625031 - 625031

DOI: https://doi.org/10.7527/S1000-6893.2021.25031

Special Topic: Application of Fault Diagnosis Technology in Aerospace Field

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

WANG Weimin ,
CHEN Ziwen ,
ZHANG Xulong ,
CHEN Kang

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1. Beijing Key Laboratory of Health Monitoring and Self-Recovery for High-End Mechanical Equipment, Beijing University of Chemical Technology, Beijing 100029, China;
2. Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China

Received date: 2020-11-30

Revised date: 2021-02-26

Online published: 2021-02-24

Supported by

National Key Research and Development Program (2020YFB2010803);National Natural Science Foundation of China (51775030,91860126)

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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

Cite this article

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 . DOI: 10.7527/S1000-6893.2021.25031

References

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