SOLID FILM LUBRICATION RESEARCH
Abstract
This report describes progress during the seventh quarterly period in a program designed to develop a solid film lubricated ball bearing system capable of operation under high speed, high temperature oxidizing conditions. The program's ultimate goal is long-term ball bearing operation at 1500 F and speeds of 10,000 to 30,000 rpm under atmospheric conditions simulating sea-level to 200,000 ft altitudes. A second program objective is to provide parametric design data relating the operating life, load, bearing size, speed, temperature and environment of these bearing systems. This report describes further efforts in improving the high temperature friction-wear characteristics of unique self- lubricating composites that are both physically and chemically capable of functioning as load-bearing surfaces in an extreme temperature-oxidizing environment. The composites are composed of solid lubricants, such as WSe2 and/ or WS2 that have been combined with a gallium-indium alloy. In the area of functional testing, the results of thirty-nine tests on 204 ball bearings that were evaluated during this reporting period are described. The bearings were operated at temperatures up to 900 F and speeds of 10,600 and 21,500 rpm. Two significant results obtained during this reporting period are the operation of (1) a 204 ball bearing in 600 F-air at 10,600 rpm for a period of 215 hours, and (2) an identical bearing system at 10,600 rpm in a 900 F environment simulating an altitude of 240,000 ft for 66 hours. In both cases the bearing carried a 50 lb thrust/50 lb radial load.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 03, 1967
- Accession Number
- AD0815712
Entities
People
- David J. Boes
- Edward S. Bober