The interactions between oil and elastomer occurring during operation of a radial lip seal (RLS) often lead to damage (e.g. blisters, cracks and oil carbon) in the sealing zone. Their evaluation is a decisive criterion in assessing the sealing system. In this research project, the effect of several operating parameters, namely circumferential speed, sump temperature, line load and time, on the development of these damage patterns has been investigated experimentally using an RLS-tribometer. The focus of the investigations was on blister formation. Dependencies of blister formation on individual operating parameters were determined, which have an influence on both the number and the shape of the blisters. By targeted control of the power loss, the processes in the sealing zone could be analysed independently of the thermal power input. From the results obtained, recommendations for preliminary investigations of oil-elastomer pairings could be derived to determine their tendency to damage.
Technical Committee Lubricants
Influence of the Coefficient of Friction and Power Loss on the Processes in the Sealing Zone of an Oil-Elastomer Pairing
The IGF project (19498 N) of the research association DGMK Deutsche Wissenschaftliche Gesellschaft für Erdöl, Erdgas und Kohle e.V., Überseering 40, 22297 Hamburg was funded via the AiF within the framework of the programme for the funding of Industrial Collective Research (IGF) by the Federal Ministry of Economics and Energy on the basis of a resolution of the German Bundestag.
Institut für Modellierung und Berechnung
Dr. Volkert Wollesen
Prof. Otto von Estorff