Investigation of Complex Bearing and/or Lubrication Systems for High Speed, High Temperature Operation

摘要

The report describes a program whose objective was to utilize complex or combined systems in order to permit operation over a wide temperature range at high speed and a variety of ambient pressures. The program reviewed the various individual items which constitute an overall system. Because of the restriction in size, desirability of light weight, and requirement for a self contained system, the rolling element bearing system was selected. The low temperature bearing for use to 1000 F would consist of Stellite 3 races and Star J balls while the high temperature bearing for operation from 1000 F to 1500 F would be either A1203 balls and races or titanium carbide balls and races. With a two bearing system, means must be found to actuate and switch from one bearing to the other. Positive actuation was selected which would remove the inactive bearing from the system. An alternate land and groove arrangement permitted engagement and disengagement with short axial movements. Solid lubricants were selected as most promising for lubrication. Because the high temperature bearing is either a ceramic or a carbide, a solution to the normal surface deterioration was sought.