This unit allows to investigate the thickness and characteristics of a lubricant film on a rolling sphere.
The unit consists in a steel sphere and a driven glass disc.
The sphere is pressed against the underside of the glass disc. The light from a reflected light microscope passes through the glass disc and the lubricant film at the point of contact, then, it is reflected from the surface of the sphere. The lubricant film thickness is determined visually from the colors of the interference rings produced. The microscope can be adjusted using a movable support, adjustable in x-y and has a focus adjustment. A defined pressure can be applied to the sphere. This pressure can be adjusted with a lever.
- Study of the elastohydrodynamic behavior of a lubricant film between a rolling sphere and a disc.
- Determination of the lubricant film thickness at the point of contact between a sphere and a disc.
- Comparison of the experimental lubricant film thickness with theoretical values.
- Study of the influence of load on the lubricant film thickness.
- Study of the influence of speed on the lubricant film thickness.