Toyo Seimitsu Zohki Co Ltd of Tokyo claim that, by using planetary gears in series, their IMT-type turning gear for a 20,000-bhp diesel engine is only one quarter the weight of a conventional gear of comparable capacity. High transmission efficiency, about 87 percent, is attained for a reduction ratio of about 1 to 1200 by virtue of the accurately cut and heat-treated teeth and the use of ball or roller bearings. Consequently the motor can be much smaller. All the rotating parts are enclosed in an oil bath and no lubrication is required except during periodical inspections. The motor is mounted over the reduction gear case and drives the primary sun wheel, by chain, through a torquelimiter. There are three planetary gear trains in series with progressively wider gear faces and heavier tooth profiles. The final stage planet wheel carrier is exceptionally robust. Ten models in the range cover output shaft torques from 100-kg m (725-lb/ft) to 9000-kg m (65,700 lb/ft).

  • Corporate Authors:

    Whitehall Technical Press Limited

    Wrotham Place
    Wrotham, Sevenoaks, Kent ME14 1PE,   England 
  • Publication Date: 1970-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00015183
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 13 1971 12:00AM