The reflection of ultrasound at an oil film can be used to determine the film thickness. A thin oil film reflects less ultrasound than a thick film. When the film is thin there is a simple relationship between oil film thickness and the proportion of the wave amplitude reflected. The reflection coefficient is in fact a complex quantity with both magnitude and phase. A model for how both the phase and amplitude vary with oil film thickness (and the properties of the bearing materials) has been developed. It has been shown that both can be used to determine film thickness. Tests have been performed to determine the oil film thickness and explore the relationship between reflection amplitude and phase. Experiments are performed both on a static oil film between flat plates, and on an operating journal bearing. Both methods provide a simple accurate method for the measurement of oil film thickness.
Skip Nav Destination
World Tribology Congress III
September 12–16, 2005
Washington, D.C., USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4201-0
PROCEEDINGS PAPER
Ultrasonic Phase and Amplitude and the Measurement of Oil Film Thickness
R. S. Dwyer-Joyce,
R. S. Dwyer-Joyce
University of Sheffield, Sheffield, UK
Search for other works by this author on:
T. Reddyhoff,
T. Reddyhoff
University of Sheffield, Sheffield, UK
Search for other works by this author on:
B. Drinkwater
B. Drinkwater
University of Bristol, Bristol, UK
Search for other works by this author on:
R. S. Dwyer-Joyce
University of Sheffield, Sheffield, UK
T. Reddyhoff
University of Sheffield, Sheffield, UK
B. Drinkwater
University of Bristol, Bristol, UK
Paper No:
WTC2005-63789, pp. 515-516; 2 pages
Published Online:
November 17, 2008
Citation
Dwyer-Joyce, RS, Reddyhoff, T, & Drinkwater, B. "Ultrasonic Phase and Amplitude and the Measurement of Oil Film Thickness." Proceedings of the World Tribology Congress III. World Tribology Congress III, Volume 1. Washington, D.C., USA. September 12–16, 2005. pp. 515-516. ASME. https://doi.org/10.1115/WTC2005-63789
Download citation file:
11
Views
Related Proceedings Papers
Related Articles
Three-Dimensional Dynamic Model of TEHD Tilting-Pad Journal Bearing—Part I: Theoretical Modeling
J. Tribol (October,2015)
Tilting Pad Journal Bearing Misalignment Effect on Thermally Induced Synchronous Instability (Morton Effect)
J. Tribol (March,2021)
Three-Dimensional Dynamic Model of TEHD Tilting-Pad Journal Bearing—Part II: Parametric Studies
J. Tribol (October,2015)
Related Chapters
Hydrodynamic Lubrication
Design of Mechanical Bearings in Cardiac Assist Devices
Precessional Slip and Microinclusion Effect on Fatigue Life of Bearing Rolling Element: An Integrated Life Estimation Model through Experimental and Analytical Investigation
Bearing and Transmission Steels Technology
Specular and Diffuse Reflectance Measurements of Aluminum Surfaces
Appearance of Metallic Surfaces