ON THE COMPUTATION OF ELECTRICAL RESISTANCE OF HYDRODYNAMIC JOURNAL BEARING

• Main Authors: Eleonora POP, Gherasim DOMIDE
• Format: Article
• Language: English
• Published: Technical University of Cluj-Napoca 2014-12-01
• Series: Carpathian Journal of Electrical Engineering
• Subjects: Hydrodynamic; journal; bearing; electrical resistance
• Online Access: http://cee.cunbm.utcluj.ro/wp-content/uploads/2018/12/CJEE20143.pdf

The paper approaches the mathematical model of electrical resistance of hydrodynamic journal bearing under different parameters of operation so as to predict bearing performance and safe load carrying capacity. The currents circulating in the journal bearing of electrical machine causes reducing of lifespan by appearance of pitting on their surface and the degradation of the lubricant. In a hydrodynamic journal bearing, the zone of minimum film thickness, load-carrying oil film varies along the circumference of a bearing through its length. This has been found to form a capacitor of varying capacitance between the journal and the bearings dependent on permittivity of the lubricant used, the bearing length, the eccentricity ratio and the clearance ratio. Besides this, load-carrying on oil film offers resistance that depends on operating parameters and resistivity of the lubricant.