1550. Characteristic analysis on the rubbing of rotor blade‑casing of aero‑engine based on Hilbert transform

Mingyue Yu1, Feng Tian2

Shenyang Aerospace University, Shenyang, China

1Corresponding author

E-mail: 1yumingyue211@163.com, 2tianfeng5861@163.com

(Received 13 November 2014; received in revised form 24 December 2014; accepted 13 January 2015)

Abstract. A characteristic analytical method for the rubbing of aero-engine rotor blade‑casing based on Hilbert Transform is proposed. The rotor experiment rig of aero-engine was used to simulate rubbing faults including single-point rub and local rub in the conditions of different casing thickness, different rubbing intensities, different rotational speeds and different rubbing positions. The casing acceleration signal was collected and subjected to the analysis by Hilbert envelope spectrum, and the result was compared with traditional spectrum analysis. The result indicates that the Hilbert envelope spectrum can effectively monitor the aero-engine running state in low frequency, and the method is more insensitive in sensor position, rotational speed, casing thickness and rubbing position. But the spectrum cannot efficiently monitor the aero‑engine running state in low frequency.

Keywords: aero-engine, casing, rub, Hilbert transform, low frequency.

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Cite this article

Yu Mingyue, Tian Feng Characteristic analysis on the rubbing of rotor blade‑casing of aero‑engine based on Hilbert transform. Journal of Vibroengineering, Vol. 17, Issue 2, 2015, p. 733‑742.

 

JVE International Ltd. Journal of Vibroengineering. Mar 2015, Volume 17, Issue 2. ISSN 1392-8716