STP1327

    High Temperature Aircraft Turbine Engine Bearing and Lubrication System Development

    Published: Jan 1998


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    Abstract

    Results are reported for a project sponsored by the United States Air Force Wright Laboratories entitled “High Temperature Bearing / Lubricant System Development.” The major emphasis of this project was the evaluation of bearing materials with improved corrosion resistance, high hot hardness, and high fracture toughness, intended to meet the requirements of the Integrated High Performance Turbine Engine Technologies (IHPTET) Phase II engine. The project included material property studies on candidate bearing materials and lubricants which formed the selection basis for subscale and full-scale bearing rig verification tests. The carburizing stainless steel alloy Pyrowear 675 demonstrated significant fatigue life, fracture toughness, and corrosion resistance improvements relative to the M50 NiL baseline bearing material. The new Skylube II (MCS-2482) lubricant provided significant thermal degradation improvements with respect to the Skylube 600 (PWA-524, MIL-L-87100) lubricant. Two 130 mm bore Pyrowear 675 hybrid ball bearings with silicon nitride balls were run successfully for 231 hours with Skylube II lubricant at temperatures consistent with IHPTET II requirements.

    Keywords:

    high temperature, aircraft turbine engine, bearing steels, carburizing stainless steel, Pyrowear 675, Skylube II lubricant, ball bearing, rig test


    Author Information:

    Grant, DH
    Pratt & Whitney, United Technologies, West Palm Beach, Florida

    Chin, HA
    Pratt & Whitney, United Technologies, West Palm Beach, Florida

    Klenke, C
    Wright Laboratory, United States Air Force, Dayton, Ohio

    Galbato, AT
    MRC Bearings, A Unit of SKF USA, Jamestown, New York

    Ragen, MA
    MRC Bearings, A Unit of SKF USA, Jamestown, New York

    Spitzer, RF
    MRC Bearings, A Unit of SKF USA, Jamestown, New York


    Paper ID: STP12142S

    Committee/Subcommittee: A01.10

    DOI: 10.1520/STP12142S


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