期刊
IET RENEWABLE POWER GENERATION
卷 11, 期 4, 页码 425-432出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-rpg.2016.0236
关键词
frequency response; wind turbines; gears; vibrations; fault diagnosis; wind power plants; mechanical testing; sensors; frequency response model; wind turbine planetary gear train vibration analysis; frequency components; asymmetric modulation sidebands; fault diagnosis characteristics; periodical time-varying transmission path; meshing force direction; planet-sun gear pairs; planet-ring meshing vibrations; mathematical model; vibration modulation sideband mechanism; testing method; sensors; gearbox casing; assembling phases
资金
- National Natural Science Foundation of China [51475169, 51475170]
- Fundamental Research Funds for the Central Universities
Frequency components of complicated asymmetric modulation sidebands, existing in the vibration of the healthy planetary gear train, are prone to be erratically diagnosed as fault characteristics, which leads to difficulties in fault diagnosis of wind turbine planetary gearbox. The factors affecting the modulation sideband, i.e. the periodical time-varying transmission path and meshing force direction, are analysed. Considering both the meshing vibrations of the planet-ring and planet-sun gear pairs, a mathematical model was developed to analyse the planetary gear train's vibration response. Simulation and experiments were conducted, and the mechanism of vibration modulation sidebands was revealed. The modulation sideband is not caused by the meshing vibration itself, but by the testing method that sensors are fixed on the ring gear or gearbox casing. The frequency components and amplitudes of the sidebands are determined by the tooth number of the ring gear and sun gear, the number of planet gears and their initial assembling phases. The asymmetric modulation sideband is mainly caused by the phase difference of the initial planets' assembling phase.
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