Properties comparison of rubber and three layer PTFE-NBR-bronze water lubricated bearings with lubricating grooves along entire bush circumference based on experimental tests. (October 2015)

• Record Type: Journal Article
• Authors: Litwin, Wojciech
• Is Part Of: Tribology international. Volume 90(2015)
• Page Start: 404
• Page End: 411
• Publication Date: 2015-10
• Subjects: Water lubricated bearings -- Stern tube bearings -- Propeller shaft bearings -- Marine bearings; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2015.03.039
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: Water lubricated bearings have been in industrial use for well over a century. During the last decade their traditional range has been expanded with new, modern products. Despite that fact, certain solutions continue to employ the standard rubber bearing with lubricating grooves located along entire bush circumference. The work presents experimental research conducted on comparable sliding bearings with lubrication grooves along entire bush circumference, assessing them against a different, modern solution. Movement resistance, pressures in bearing interspace and shaft orbits were measured and analyzed. It was proved that classic bush geometry is not appropriate for hydrodynamic lubrication. Highlights: Four water lubricated bearings in real-life scale were experimentally tested. Conditions during tests were typical for marine bearings and water turbine bearings. Hydrodynamic lubrication occurred in some bearings. 3-layer bearing has good tribological properties. Starting friction of NBR bearing depends strongly on time duration of work pause.