Abstract
The current paper addresses the field of experimental research of journal bearing systems. In this regard, the challenges are dealt with concerning simultaneous testing with a close correlation to the industrial application and with a high resolution of tribological processes. Concerning this aspect, two damage equivalent laboratory test methodologies for journal slide bearing systems are presented, and their ability to visualize certain performance parameters of bearing systems are emphasized (for instance friction performance, (start stop) wear processes, and seizure events). The results clearly emphasize that the applied methodologies provide accurate findings regarding specific effects of selective parameters/changes on the performance of bearing systems, such as polymer overlays may result in improved mixed friction sliding conditions if designed properly, and they provide superior start stop wear resistance; the use of specific corrosion inhibitors can successfully prevent tribo-corrosion on bronze bearings; a decrease of oil viscosity increases solid friction share but decreases fluid friction; lubricant anti-wear additives are able to improve seizure resistance and sliding properties of bearing systems depending on formulation harmonization; and novel bearing material coatings, e.g., sputtered SnCu, can significantly improve emergency running capabilities.
Highlights
In various applications of technical systems, there is a need to hold, guide, and support linear moving or rotating parts by means of slide bearing components
Journal bearings are used in manifold application areas, which are, time and again, subjected to profound and rapid changes to affect an improvement in the performance; e.g., re-design of combustion engines to limit exhaust gas emissions
The disc specimens, which are made of the bearing material, are realized with four notches splitting the area of contact
Summary
In various applications of technical systems, there is a need to hold, guide, and support linear moving or rotating parts by means of slide bearing components. Is rigs, have emerged aiming for high visualization power of tribo-processes and manifold measurement emphasized in literature that various basic model test configurations, such as pin-on-plate, fail to reproduce damage mechanisms and tribological of journal bearing applications, such scratch parameters In this regard, tribological model scale functionality set ups including micro abrasion testers [10], as shown in [13]. Damage equivalency is regarded as a mandatory aspect when using a tests [11], or pin-on-disc systems [12] are compromisingly carried out to gain a better understanding model test configuration for bearing research in order to transfer results from model tests onto about the basic tribological phenomena of sliding surfaces It is emphasized in journal bearing application environments [14]. The abilities of the proposed test methodologies for characterization of
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