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Gear rating and marine reduction gear - Nauticus Machinery - Gear Faceload and Gear Rating

Marine reduction gear analysis

Gear rating and faceload software

The Nauticus Machinery gear package is divided into two tools - Gear Rating and Gear Faceload. With these tools you can calculate contact stresses, scuffing and fatigue capacity and face load distribution in marine reduction gears.

Software for marine reduction gear analysis

  • The software covers gear rating as limited by contact stresses (pitting, spalling or case crushing), tooth root stresses (fatigue breakage or overload breakage), and scuffing resistance
  • Faceload calculation combines elastic deflection of pinion and gear with other linear misalignments
  • Gear Rating and Gear Faceload tools share input
  • Efficient determination of load-carrying capacity for gear with ice class notation
  • Faceload tool can be used as input to gear rating tool or for verification of the tooth contact patterns by lacquer test during sea trial
  • Faceload also suitable for design optimization of the helix modification
  • Calculations in accordance with DNV’s Classification Note 41.2 (Gear rating for marine transmissions) and 51.1 (Ice strengthening of propulsion machinery)
  • Mainly based on ISO-6336 Part 1-5 (cylindrical gears), partly on ISO 10300 Part 1-3 (bevel gears) and ISO Technical Reports on Scuffing and Fatigue Damage Accumulation

Key benefits of the Gear Faceload and Gear Rating software module

  • DNV’s extensive marine gear experience over many years has led to the development of the powerful tool for marine reduction gear analysis
  • Visual representation and animation of gear geometry
  • Graphical representation of lead modifications
  • Flexible report generator
  • Printout of standard gear data sheet
  • Calculates sub surface fatigue criteria (not in ISO)
  • Enhanced method for root safety on bevel gears in marine applications
  • Support for IACS Unified Requirements for Polar/Baltic ice-class
  • Calculates torque loads, surface durability, tooth strength, subsurface fatigue and scuffing due to ice impacting
  • Clear results and good reporting interfaces
  • For cylindrical gear and bevel gear

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