Accession Number:

ADA021473

Title:

Axial-Centrifugal Compressor Program, Evaluation of Ausformed Bearings

Descriptive Note:

Final rept. 1 Aug 1972-15 Jun 1975

Corporate Author:

GENERAL ELECTRIC CO CINCINNATI OH AIRCRAFT ENGINE BUSINESS GROUP

Report Date:

1976-02-01

Pagination or Media Count:

121.0

Abstract:

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.

Subject Categories:

  • Properties of Metals and Alloys
  • Machinery and Tools
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE