Rolling Bearings Greases Deterioration - Structure, Chemical Composition, Rheology, Service Life Correlations

摘要

Grease lubrication for ball or roller bearings became a daily practice in technical applications (over than 80% of bearings assemblies can be greased lubricated) because of its advantages in avoiding the sophisticated circulation or cooling systems. In the same time, all the researches that were developed in this field are lack in informations regarding the forming and the deterioration of grease lubricated contacts. The global results of the researches on the lubricating greases are presented. The tests were done in different functioning conditions and media and for greases analyses chemical and imagistic methods were performed. The discovered correlations are very useful in obtaining as long as possible greased rolling bearings service life.