The operation of high speed gearing systems in the transmissions of tiltrotor aircraft has an effect on overall propulsion system efficiency. Recent work has focused on many aspects of high-speed helical gear trains as would be used in tiltrotor aircraft such as operational characteristics, comparison of analytical predictions to experimental data and the affect of superfinishing on transmission performance. Baseline tests of an aerospace quality system have been conducted in the NASA Glenn High-Speed Helical Gear Train Test Facility and have been described in earlier studies. These earlier tests had utilized single helical gears. The results that will be described in this study are those attained using double helical gears. This type of gear mesh can be configured in this facility to either pump the air-oil environment from the center gap between the meshing gears to the outside of tooth ends or in the reverse direction. Tests were conducted with both inward and outward air-oil pumping directions. Results are compared to the earlier baseline results of single helical gears.


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    Title :

    Double Helical Gear Performance Results in High Speed Gear Trains


    Contributors:
    R. F. Handschuh (author) / R. Ehinger (author) / E. Sinusas (author) / C. Kilmain (author)

    Publication date :

    2010


    Size :

    17 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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    Double Helical Gear Performance Results in High Speed Gear Trains

    Handschuh, Robert F. / Ehinger, Ryan / Sinusas, Eric et al. | NTRS | 2010


    Double Helical Gear Performance Results in High Speed Gear Trains

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    EFFICIENCY OF HIGH-SPEED HELICAL GEAR TRAINS

    Handschuh, R. F. / Kilmain, C. J. / American Helicopter Society | British Library Conference Proceedings | 2003


    Efficiency of High-Speed Helical Gear Trains

    R. R. Handschuh / C. J. Kilmain | NTIS | 2003