Axial-Centrifugal Compressor Program,Evaluation of Ausformed Bearings.

摘要

A development program was performed to manufacture, test, and evaluate 35mm diameter ball bearings, using thermomechanically processed rings and balls. The program was subdivided into three main elements: manufacture of test bearings, test facility design and construction, and bearing life testing. All three tasks were completed successfully and are detailed in this report. 35-mm-bore angular contact ball bearings, typical of those used in advanced Army propulsion systems were produced using high-energy-rate forging techniques to form the inner and outer rings, and forward extrusion to produce the ball stock. These bearings were tested in specially designed turbine-driven high-speed test facility, at a speed of 65,000 rpm, at an axial load of 500 lb. and at a temperature of 160F-180F. The initial bearing configuration planned for this test series was found to be inadequate for the above test conditions. A series of iterations was therefore introduced which resulted in a viable test bearing.