Accession Number:

AD0276998

Title:

GAS LUBRICATION OF BEARINGS AT VERY HIGH TEMPERATURES, HIGH SPEEDS, AND LOW LUBRICANT FLOW RATES

Descriptive Note:

Summary rept. for 15 Feb 61-15 Feb 62 on Aviation Lubricant Flow Rates

Corporate Author:

FAIRCHILD HILLER CORP BAY SHORE NY STRATOS DIV

Personal Author(s):

Report Date:

1962-02-01

Pagination or Media Count:

1.0

Abstract:

Journal bearings 1.5 in. in diameter and 2 in. long were tested with N as the lubricant gas over a range of test conditions from room temperature 1900 F, zero speed to 65,000 rpm, under radial loads to 10 lb. The effects of temperature and shaft speed on lubricant gas flow are presented, and correlation with theoretically predicted temperature variation is attempted. Thrust bearings of 1.5 in. diameter were tested with the lubricant gases N, He, Ar and Freon 14 CF4 over a range of test conditions from room temperature to 1900 F, zero speed to 65,000 rpm, under axial loads to 100 lb. Axial instability was encountered, but was overcome by use of a grooved-recess type of thrust bearing. The effects of load, temperature, supply pressure, and lubricant gas differences on the lubricant-gas flow are presented, and correlation with theoretical predictions is attempted. An all-ceramic rig was used for thrust-bearing tests at 1900 F, and a five-circuit gas supply preheating furnace was put into service. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE