Cooling Requirements of Ball Bearings Lubricated by Glass-Fiber-Filled Polytetrafluoroethylene Retainers in Cold Hydrogen Gas.

Abstract

Experiments were performed with 40-mm-bore ball bearings operating at shaft speeds to 35 000 rpm and thrust loads to 400 lbs (1780 N) in 60 deg R (33 K) hydrogen gas. The minimum coolant flow rate equation developed for bearings equipped with this retainer material was similar to the equation determined in a previous study for bearings with a bronze-filled polytetrafluoroethylene (PTFE) retainer. Retainer wear rate was very low; some inner-race ball-track wear was evident for bearings that had been run for more than 7 hours.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1970
Accession Number
ADA307828

Entities

People

  • David B. Brewe
  • Harold H. Coe
  • Herbert W. Schibbe

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • C4I
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ball Bearings
  • Bearings
  • Body Weight
  • Coefficients
  • Equations
  • Fibers
  • Films
  • Flow Rate
  • Flowmeters
  • Fluoropolymers
  • Gas Flow
  • Glass Fibers
  • Heat Transfer
  • Liquid Hydrogen
  • Materials
  • Measurement
  • Rocket Engines

Readers

  • Petroleum Engineering
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).