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

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)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1962
Accession Number
AD0276998

Entities

People

  • John S. Meacher

Tags

DTIC Thesaurus Topics

  • Axial Loads
  • Bearings
  • Diameters
  • Flow
  • Flow Rate
  • Gas Flow
  • High Temperature
  • Journal Bearings
  • Lubricants
  • Lubrication
  • Thrust Bearings

Readers

  • Combustion and Flow Dynamics.
  • Thermal Physics or Thermal Science.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).