An Improved Epicyclic Gearbox for Reduced and Controllable Sub-Synchronous Vibrations in Gas Turbogenerator Applications PUBLIC ACCESS

[+] Author Affiliations
A. K. Rakhit

Solar Turbines Incorporated, San Diego, CA

Paper No. 96-GT-019, pp. V005T14A004; 8 pages
  • ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General
  • Birmingham, UK, June 10–13, 1996
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7876-7
  • Copyright © 1996 by ASME


An improvement is made to the design of epicyclic gearbox that limits the dynamic eccentricities of gearbox components. Gearboxes manufactured to the new design and tested, showed reduced levels of sub-synchronous vibrations at the turbine bearings. The in-situ balancing feature of the gearbox is also found to be very effective in reducing these vibrations further. The improved gearboxes not only assured the service life of the turbine bearings, but also increased the success rate of package testing the first time with substantial cost savings.

Copyright © 1996 by ASME
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