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Local Fault Detection and Diagnosis of the Bearings in Turbopropengine Reduction Gearbox
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Xin LI, Lü ZHONG, Tian-tian ZHANG, An FENG
Science Technology and Engineering | 2025, 25(19) : 8058 - 8063
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Science Technology and Engineering | 2025, 25(19): 8058-8063
• Papers∙Mechanical and Instrumental Industry •
Local Fault Detection and Diagnosis of the Bearings in Turbopropengine Reduction Gearbox
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Xin LI, Lü ZHONG, Tian-tian ZHANG, An FENG
Affiliations
  • Hunan Aviation Powerplant Research Institute, AECC, Zhuzhou 412002, China
Published: 2025-07-08 doi: 10.12404/j.issn.1671-1815.2405268
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Bearing local fault occurs in the turboprop engine reduction gearbox, which affects engine running safely. Due to the complex structure and high speed of the reducer gearbox, the vibration signal used to monitor the operation state of the mechanical components is complicated. In order to detect the bearing local fault signal in time and extract fault feature accurately from the vibration signal, a method which was based on vibration signal combining FFT, fast kurtogram and envelope spectrum was proposed. Firstly, during the engine operation, the FFT(fast Fourier transform) spectrum was used to detect whether there was bearing fault component in the vibration signal; and then the fast kurtogram was applied to determine the frequency band distribution of the fault component; finally, the bearing fault characteristic frequency was acquired through envelope spectrum analysis. In the course of certain type of turboprop engine ground bench test, this method was used to accurately detect and diagnose the local spalling fault of the inner raceway. Therefore, this method can provide a basis for the engineering application on local fault detection and diagnosis of bearings in aero-engine reduction gearbox.

turbopro engine  /  reduction gearbox  /  bearing local fault  /  FFT spectrum  /  fast kurtogram  /  envelope spectrum
Xin LI, Lü ZHONG, Tian-tian ZHANG, An FENG. Local Fault Detection and Diagnosis of the Bearings in Turbopropengine Reduction Gearbox[J]. Science Technology and Engineering, 2025 , 25 (19) : 8058 -8063 . DOI: 10.12404/j.issn.1671-1815.2405268
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Year 2025 volume 25 Issue 19
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doi: 10.12404/j.issn.1671-1815.2405268
  • Receive Date：2024-07-13
  • Online Date：2025-12-22
  • Published：2025-07-08
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  • Received：2024-07-13
  • Revised：2024-12-23
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    Hunan Aviation Powerplant Research Institute, AECC, Zhuzhou 412002, China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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