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LI Xin, ZUO Hong-fu, CAI Jing. Electrostatic monitoring of gearbox's lubricating oil system[J]. Journal of Traffic and Transportation Engineering, 2016, 16(2): 72-81. doi: 10.19818/j.cnki.1671-1637.2016.02.009
Citation: LI Xin, ZUO Hong-fu, CAI Jing. Electrostatic monitoring of gearbox's lubricating oil system[J]. Journal of Traffic and Transportation Engineering, 2016, 16(2): 72-81. doi: 10.19818/j.cnki.1671-1637.2016.02.009
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Electrostatic monitoring of gearbox's lubricating oil system

doi: 10.19818/j.cnki.1671-1637.2016.02.009

  • School of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, Jiangsu, China

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  • Author Bio:

    LI Xin(1990-), male, doctoral student, +86-25-84895772, lixin1990@nuaa.edu.cn

    ZUO Hong-fu(1959-), male, professor, PhD, +86-25-84891097, rms@nuaa.edu.cn

  • Received Date: 2015-10-21
  • Publish Date: 2016-04-25
    Abstract
  • The lubricating oil electrostatic monitoring system that was built by a new type 3 499.5 kW gearbox test rig for the wear condition monitoring of gearbox in ground test, was used to complete the full flow abrasive particle electrostatic monitoring test for the lubricating oil systems of gearboxes.The original electrostatic signals were obtained from continuous loading test and accelerated life test.The root-mean-square values of time-domain signals were extracted as the characteristic parameters to represent the particle charging situation in the lubricating oil.The variation tendency of electrostatic signals were analyzed at two test stages respectively and compared with MetalSCAN online monitoring data and the offline result of oil sample spectrum analysis for validation.Analysis result shows that at the continuous loading test stage, the lubricating oil electrostatic signal fluctuates slightly with the change of rotational speed.At accelerated life test stage, the electrostatic signals of gearboxes synchronously change with the torque in a single cycle test.The abnormal wear of gearbox 2 is detected at the ultimate load test stage of the eighth cycle in accelerated life test, while gearbox 1operates normally, which is in accord with the results of MetalSCAN monitoring and the spectrum analysis.The fatigue crack of coupling diaphragm and the gear tooth root pitting of high-speed output shaft in gearbox 2arefound in disassemble gearbox fault detection.This proves electrostatic monitoring method is feasible and effective in wear condition monitoring of the gearbox and establishes the foundation for further implement of gearbox life prediction and installed online monitoring of the actual wind field.

     

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