... lubrication mechanical contact rolling bearings indentation contamination pollution fatigue rolling bearing life Surface defects, especially indents, have been recognized as an important cause of premature rolling contact fatigue. Solid particles from oil contamination entering the contact...

...Shuyu Zhang; Brian D. Strom A new method is introduced for predicting particle and liquid droplet contamination on an air bearing surface. The method primarily relies on the analysis of flow patterns nearest the air bearing surface, restricted to two dimensions. In addition, a mathematical model...

... into the bearing housing. The helical design allows the seal to clear itself of any oil contamination. The objective is to determine if CFD simulations can be used along with a few experimental tests to study windback seals of this design. Comparison of measurement and predictions for a simple rectangular cavity...

...P. L. Dickrell; W. G. Sawyer; J. A. Heimberg; I. L. Singer; K. J. Wahl; A. Erdemir A closed-form time- and position-dependent model for coverage, based on the adsorption of environmental contaminants and their removal through the pin contact, is developed for reciprocating contacts. The model...

... that incorporates some transverse flow effects is needed to better characterize the airflow between the slider and disk for some applications. In this paper such a model is derived to better predict the paths of contamination particles entrained in the air bearing. The characteristics of airflow and particle flow...

...P. L. Dickrell; W. G. Sawyer; A. Erdemir The frictional behavior of diamond-like carbon (DLC) films varies with environmental condition. One theory asserts that the cause of variations in the frictional performance is environmental contaminants adsorbing onto the DLC film surface. Testing...