THE ASSESSMENT OF AN EFFECT OF ELECTRICAL POTENTIAL INDUCED IN A ROTATING SHAFT-OIL-LIP SEAL SYSTEM ON BRAKING TORQUE
Journal Title: Tribologia - Year 2014, Vol 255, Issue 3
Abstract
The paper presents the results of measurements of the electric potential and braking torque in the friction junction, which is in a rotating metal shaft–base oil–rotary lip seal system for different ranges of the base oil’s temperature and of the shaft’s angular velocities. The system is an interfacial one and consists of two interfaces: shaft–oil film and oil film–lip seal. When a shaft rotates, intense tribocharging occurs, and an electric field forms that generates the flow of charge within an oil film between two electrical double layers at both surfaces of a shaft and a lip of a rotary lip seal. It is of interest that, within a narrow range of the oil’s temperature, a local change in the rotating torque occurs – a local extremum (minimum) – while the potential difference changes its sign from negative to positive. In the research, the synthetic PAG (polyalkylene glycol) and PAO base oils and a fluorocarbon rotary lip seal are used.
Authors and Affiliations
Juliusz B. GAJEWSKI, Marek J. GŁOGOWSKI
Keywords
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