Effect of oxygen concentration on the performance of synthetic paraffinic oils in short term bearing tests from 400 ̊to 500 ̊F
Richard Jay Parker, Erwin V. Zaretsky, Lewis Research Center, United States. National Aeronautics and Space Administration
National Aeronautics and Space Administration, 1969 - Technology & Engineering - 16 pages
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1-hr test 6-hr 26 hours 6-hour tests 8-percent oxygen concentration angular-contact ball bearings antiwear additive ASLE Trans Bamberger bearing not rotating bearing operation bearing outer-race temperature bearing surfaces bearing test apparatus bearing torque increase cant cosity due to lubricant Effect of oxygen film forming capabilities Fluids high-temperature bearing test increased as oxygen increases in lubricant increases in torque increases in viscosity induction period inner race least 6 hours less than 0.1 Lewis Research Center liquid lubricants lubricant degradation Lubricant flow rate lubricant oxidation lubricant viscosity NASA TN oil with oxidation outer race oxidation inhibitor significantly oxygen concentration increased percent by volume refs relatively small increases rpm and 70-pound shown in figure stress of 200 strip-chart recorder sump synthetic paraffinic oil temperatures of 400 TERM BEARING TESTS test 6-hr test Test Duration test lubricant test-bearing chamber tests at 400 thermocouple thrust load total acid number uninhibited oil uninhibited synthetic paraffinic viscosity increase