GEAR LOADS DURING REVERSE DRIVE OR MARINE STEAM TURBINES

GETRIEBEBELASTUNG BEIM UMSTEUERN VON SCHIFFSDAMPFTURBINENANLAGEN

The loads impose on mechanical gear transmission during the reversal maneuvers are examined because of unsteady loads and gear wear. Large stress gradients in the gearing shafts and large, quickly alternating tooth forces and bearing forces are to be expected due to the decelerations and accelerations which occur for the rotational movements of the shafts, for instance, from an emergency or crash-stop maneuver. Deviations from steady operating conditions may appear as to the hydrodynamic behavior in the friction bearings of the gear unit. Alternating axial forces and torques emanate from the propeller and are forwarded over the shaft line to the gear. Just so, alternating torques from the high-pressure and from the low-pressure turbine arrive at the gear, which depend on the time-variable course of the steam flow rates passing through the forward and the reverse valve.

  • Corporate Authors:

    VDI Nachrichten

    Postfach 1139, Graf-Recke-Strasse 84
    4 Dusseldorf 1,   Germany 
  • Authors:
    • Belohradsky, H J
  • Publication Date: 1978-6-1

Language

  • German

Media Info

  • Features: References;
  • Pagination: p. 518-524
  • Serial:
    • VDI-Z
    • Volume: 120
    • Issue Number: 11
    • Publisher: VDI Nachrichten

Subject/Index Terms

Filing Info

  • Accession Number: 00184840
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jan 13 1979 12:00AM