Detection of Lubrication State in a Field Operational Wind Turbine Gearbox Bearing Using Ultrasonic Reflectometry
نویسندگان
چکیده
Fully flooded lubrication is the ideal state for a rolling bearing; this especially true in aggressive environment of wind turbine transmission where bearings are subject to intermittent operation and highly variable loading. In paper, novel ultrasonic reflection method used detect presence oil between rollers bearing. Ultrasonic sensors were instrumented on static inner (lab) outer (field) bearing raceways reflections captured as travelled past sensor. The proportion sound wave reflected (known coefficient, R) dependent acoustic mismatch materials either side interface. Changes R indicate steel–air or steel–oil interface values transitioned from 1 0.95, respectively, even lower steel–roller Consequently, it was possible lubricant raceway roller passes. From laboratory measurements, recurring coefficient patterns passes identify condition raceway. An absence these indicated surface. For field three conditions (partial, insufficient, fully lubricated) observed. Partially insufficiently lubricated datasets found occur mostly during transient operation. As often accompanied by overloading torque reversals, coupled with issues, all act increase risk premature failure.
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ژورنال
عنوان ژورنال: Lubricants
سال: 2021
ISSN: ['2075-4442']
DOI: https://doi.org/10.3390/lubricants9010006