GAS LUBRICATION OF BEARINGS AT HIGH TEMPERATURES.
Rept. for 15 Feb 62-15 Jan 63,
FAIRCHILD HILLER CORP BAY SHORE NY STRATOS DIV
Pagination or Media Count:
Externally pressurized gas-lubricated journal bearings 1.5 in. in diameter and 2 in. in length and thrust bearings 1.5 in. in diameter were tested with nitrogen as the lubricant gas at temperatures to 1200 F. A variable-inductance type proximity system was applied to the measurement of bearing operating clearances at temperatures up to 1200 F. Clearances were measured under static nonrotating conditions for a wide range of lubricant-supply pressures and bearing loads. Shaft motion was observed during high-speed rotating tests indicating dynamic instability. The effects of lubricant-supply pressure, loading, and temperature on the threshold of instability were recorded. Correlation with theoretical predictions of bearing load capacity, clearance, and whirl threshold was examined. Author