Accession Number : AD0757869

Title :   High Performance Bearing Study.

Descriptive Note : Technical rept. 5 Mar 71-5 Jun 72,

Corporate Author : MECHANICAL TECHNOLOGY INC LATHAM N Y

Personal Author(s) : Waldron,Warren D. ; Young,William E.

Report Date : 15 JUL 1972

Pagination or Media Count : 207

Abstract : A feasibility investigation was performed to identify the probable advantages, problem areas, and the degree of feasibility of applying air lubricated bearings to an advanced class of U.S. Air Force complex-cycle aircraft engines. Three P+WA engines incorporating wraparound ramjets for high-Mach number, high-altitude operation were used as vehicles for the evaluation. No significant engine performance, size or weight penalty associated with air-lubricated bearings when compared to conventional oil-lubricated, rolling-element bearings was found. Hydrodynamic type bearings were found to have better load capacity characteristics than hydrostatic or hybrid types. New methods of cooling both the journal and thrust bearing were conceived which reduced the quantity of cooling air required from the engine. (Author Modified Abstract)

Descriptors :   (*GAS BEARINGS, *JET ENGINES), GAS TURBINES, RAMJET ENGINES, LUBRICATION, STABILITY, COOLING, MATERIALS, FEASIBILITY STUDIES

Subject Categories : Machinery and Tools
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE