Detection of Lubrication Conditions in Ball Bearings Using Acoustic Ultrasound Signals

Research output: Book/anthology/dissertation/reportPh.D. thesis

Abstract

The focus of this PhD dissertation is the systematic monitoring of lubrication states in
grease-lubricated ball bearings utilizing ultrasonic acoustic signals. The primary
objective has been to detect quality of lubrication film formation between the balls
and raceways, and also to suggest and conduct experiments where the quality of the
lubrication film can be controlled.
A set of experiments were designed and executed with ball bearings in operational
states under radial load, encompassing diverse lubrication conditions. These
conditions were achieved by altering the rotational speed and temperature within the
bearings, consequently impacting the viscosity of the base oil in the applied lubricating grease Subsequently, the acquired acoustic signals were used, together with statistical descriptors (features), to train algorithms adept at recognizing insufficient lubrication.
Additionally, the project involved the development of specialized electronics for the
acquisition of acoustic signals. A sensor prototype was engineered and utilized in three out of the four experiments conducted.
Original languageEnglish
PublisherAarhus University
Number of pages246
Publication statusPublished - Feb 2024

Keywords

  • lubrication
  • condition monitoring
  • ultrasound

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