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Ball bearing and bellows face seals for supersonic aircraft gas turbine engine mainshafts tested with selected lubricants using oil-mist and jet lubrication systems
Space environmental effect on lubricants and rolling element bearings, comparing evaporative losses of solid and liquid lubricants
This paper is a general review of current tribology practices for space applications, including lubrication concepts, lubricants, space mechanism types, and test facilities and procedures.
Solid gallium is used as a lubricant on bearings made of compatible materials. Such lubricants perform well in a high vacuum and under low temperature.
Polytetrafluoroethylene /PTFE/ balls are interspersed among steel ball bearings to provide a dry lubricant in a high vacuum environment. The steel balls are lubricated by the film worn off the PTFE balls.
Calcium fluoride with a suitable inorganic binder forms a stable solid-film lubricant when fused to the surface to be lubricated. It is effective in environments at elevated temperatures and gas pressures ranging from atmospheric to high vacuum. It is not stable in reducing atmospheres.
Dry film lubricant protects low speed sliding surfaces under extreme loading. The lubricant in an inorganic binder is applied to substrates with sufficient hardness to prevent surface deformation in the applicable load range.
Acrylic enamel spray containing metallic copper pigment lubricates refractory metal tubing during cold drawing operations so that the tubing surface remains free from scratches and nicks and does not seize in the die. Zirconium alloys, zirconium, tantalum alloys, niobium alloys, vanandium alloys and titanium alloys have been drawn using this lubricant.
Miniaturized lubricant film thickness and pressure transducers for liquid metal lubricated journal bearings in high speed turbines
Self-lubricating composites of porous nickel and nickel-chromium alloy impregnated with a barium fluoride-calcium fluoride eutectic, and a thin film of solid lubricant increase wear life of load bearing surfaces.
Synthetic paraffinic oil lubricates ball bearings at temperatures in the 600 degrees F range. The lubricant contains antiwear and antifoam additives, is thermally stable in the high temperature range, but requires protection from oxygen.
Summary information on lubricants and lubrication for use in aerospace environments, and simulation of space environments in vacuum chamber
Worm gear lubrication with bonded solid film lubricants, discussing efficiency and wear life test apparatus
Physical sputtering deposition of molybdenum disulfide films as solid lubricant on rotating and sliding components, discussing lubrication properties in vacuum
Self-lubricating gear, designed for long term operation in a vacuum at high, low, and ambient temperatures, is constructed of alternating layers of metal and a dry lubricant material, such as polytetrafluoroethylene, with a suitable reinforcing material bonded into a laminated composite unit, which is machined to form a standard gear.
Ball bearings lubrication and wear in cryogenic hydrogen turbopumps by transfer films provided from self lubricating cage
Physical sputtering deposition of molybdenum disulfide films as solid lubricant on rotating and sliding components, discussing lubrication properties in vacuum
Development of hybrid bearing lubrication system with combination of standard type lubrication and magnetic flux field for earth atmosphere and space environment operation