The Effect of Aircraft Gas Turbine Engine Lubricants on Rolling/Sliding Contact Fatigue.
NAVAL AIR PROPULSION TEST CENTER TRENTON N J PROPULSION TECHNOLOGY AND PROJECT ENGINEERING DEPT
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Contact fatigue testing under conditions of both pure rolling and rolling with sliding were conducted on various lubricants and additives. Principal findings were that a perfluoroalkylpolyethers, C-ethers and a synthetic hydrocarbon traction fluid were all found to improve contact fatigue life over oils conforming to the MIL-L-23699B specification i.e. polyol esters b a phosphorous salt high gear loading additive was found to be detrimental to fatigue life c micropitting is a precursor to fatigue spalling when sliding is present d fatigue life decreases dramatically with increasing sliding velocity and increases with increasing rolling velocity, and e additives are most effective when sliding is present.
- Lubricants and Hydraulic Fluids
- Jet and Gas Turbine Engines