Cooling requirements of ball bearings lubricated by glass-fiber-filled polytetrafluoroethylene retainers in cold hydrogen gas /
by Harold H. Coe, David E. Brewe, and Herbert W. Scibbe.

Description

Main Author

Coe, Harold H.

Related Names

Scibbe, Herbert W.
Brewe, David E.
United States. National Aeronautics and Space Administration.
Lewis Research Center.

Language(s)

English

Published

Washington, D.C. : National Aeronautics and Space Administration ; 1970]

Subjects

Turbine pumps.
Polytef.
Glass fibers.
Ball-bearings > Ball-bearings / Lubrication.
Hydrogen.
Ball-bearings > Ball-bearings / Cooling.

Summary

Experiments were performed with 40-mm-bore ball bearings operating at shaft speeds to 35 000 rpm and thrust loads to 400lbf (1780 N) in 60 degree R (33K) 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.

Note

Prepared at Lewis Research Center.
"February 1970."
Cover title.

Physical Description

25 p. : ill. ; 27 cm.

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