Preprint Article Version 1 This version is not peer-reviewed

The Impact of Lubricant Film Thickness and Ball Bearings Failures

Version 1 : Received: 14 February 2019 / Approved: 18 February 2019 / Online: 18 February 2019 (07:29:17 CET)

A peer-reviewed article of this Preprint also exists.

Marko, M.D. The Impact of Lubricant Film Thickness and Ball Bearings Failures . Lubricants 2019, 7, 48. Marko, M.D. The Impact of Lubricant Film Thickness and Ball Bearings Failures †. Lubricants 2019, 7, 48.

Journal reference: Lubricants 2019, 7, 48
DOI: 10.3390/lubricants7060048

Abstract

An effort was made to find a relationship between the ratio of average asperities height and lubricant thickness at the point of contact of rolling element ball bearings, and empirical equations to predict the life for bearings under constant motion. Two independent failure mechanisms were considered, fatigue failure and lubricant failure resulting in seizing of the roller bearing. A theoretical formula for both of these methods was established for the combined probability of failure using both of these failure mechanisms. Fatigue failure was modeled with the empirical equations of Lundberg and Palmgren and standardized in DIN/ISO281. The seizure failure, which this effort sought to investigate, was predicted using Greenwood and Williamson's theories on surface roughness and asperities during lubricated contact. These two mechanisms were combined, and compared to predicted cycle lives of commercial roller bearing, and a clear correlation was demonstrated. This effort demonstrated that the Greenwood-Williams theories on the relative height of asperities versus lubricant film thickness can be used to predict the probability of a lubricant failure resulting in a roller bearing seizing during use.

Subject Areas

lubrication; ball bearings; roller bearings; failures; L10; film thickness

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.