STP1339

    Hydraulic Gear Pump Failure Analysis and Tribology Simulation

    Published: Jan 2001


      Format Pages Price  
    PDF (328K) 14 $25   ADD TO CART
    Complete Source PDF (13M) 14 $142   ADD TO CART


    Abstract

    Surface analysis of hydraulic gear pumps used in gas turbine failure power generation reveals service life limitations due to gear wear and scuffing. A flexible tribology testing capability (WAM) provides an ability to simulate lubrication and failure mechanisms. A load capacity test protocol developed for gas turbine MIL-PRF-23699 oils is found to invoke the same lubrication and failure mechanisms experienced in hydraulic gear pumps. Scuffing, micro-scuffing and traction (friction) data from load capacity tests show variable lubricating qualities among turbine engine oils used in service. A test protocol that monitors the traction coefficient over a range of load stages reflects both wear and scuffing attributes of oils used in service. The test method shows performance differences among oil types within the same specification and a reduction in wear performance with used oils. The test approach provides an opportunity for more efficient development of gear materials, lubricants and engineered surfaces.

    Keywords:

    gear pumps, hydraulic fluids, load capacity tests, oils for gas turbines, scuffing, surface failure analysis, traction (friction), tribology testing, wear


    Author Information:

    Wedeven, LD
    President, Wedeven Associates, Inc, Edgmont, PA

    Bourdoulous, R
    Project Engineer, Ancillary Systems, United Technologies, Pratt & Whitney, East Hartford, CT


    Paper ID: STP38270S

    Committee/Subcommittee: D02.N0

    DOI: 10.1520/STP38270S


    CrossRef ASTM International is a member of CrossRef.