Rolling-element bearing internal temperatures

The internal temperature distribution within tapered rolling-element bearings was investigated. A simple experimental procedure using thermocouples for the stationary outer race and a temperature-sensitive medium on the moving components was used to determine bearing operating component temperatures. Circulating oil was used to lubricate the bearings. Temperatures for two different loads and three taper conditions (simulating bearing misalignment) are given. Corresponding contact pressure distributions and the calculated EHL films are shown. The correlation between temperatures and changes in pressure distributions, as well as their calculated effects on the lubricant film, can be easily seen.