JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS
Online ISSN : 2189-9967
Print ISSN : 0915-1168
ISSN-L : 0915-1168

This article has now been updated. Please use the final version.

Effect of Surface Texture on EHL Oil Film Behavior under Rolling Contact
Junji MURATAShigeo KAMAMOTOYuki SHISHIHARATakashi IZUMIMamoru TOHYAMA
Author information
JOURNAL FREE ACCESS Advance online publication

Article ID: 17-00011

Details
Abstract

To decrease the agitating resistance and the rolling viscosity resistance of rolling bearings, it is effective to reduce the quantity of lubricant. However, the reduction of lubricant quantity decreases the EHL oil film thickness. The breakdown of EHL oil film causes the short life of the rolling bearing. In this paper, we used three-wavelength interferometry method to obtain basic data for the development of new surface textures for operation under starved lubrication conditions. The three-wavelength interferometry method is successfully applied for the measurement of EHL oil film thickness on the textured surface under rolling contact. With this method, measurements can be taken with high precision over wide thickness range and in one shot. Three texture patterns were tested under fully flooded lubrication: line groove, cross-hatch and dimples. Under fully flooded lubrication, oil film on the edge near the groove became thinner with line groove and cross-hatch textures, but did not change significantly with dimple texture. Under oil starvation, cross-hatch and dimple textures were compared. The oil film did not change significantly with both of them. By increasing the dimple diameter and deepening the dimple under oil starvation, the amount of oil retained increases and the oil film also thickness increases.

Content from these authors
© 2018 Japanese Society of Tribologists
feedback
Top