The report often details how to create a thermal network model. This involves treating the gearbox as a network of thermal resistances and nodes (housing, shafts, bearings, gears, oil, and ambient air) to calculate heat dissipation accurately.
Unlike ISO/TR 14179-1 , which focuses on a simplified analytical model for rating gear drives at a fixed 95 °C sump temperature, offers a more detailed approach that includes measurements on original gear units under practical conditions. Key Methodology: The Thermal Balance iso tr 14179-2 pdf
(Shaft Seal Drag): Constant friction losses generated by radial lip seals clinging to rotating shafts. PLWcap P sub cap L cap W end-sub The report often details how to create a
ISO/TR 14179-2 is a Technical Report that provides guidelines for the development and use of simulation models in the field of road traffic and transportation. Specifically, it focuses on "Road traffic simulation - Part 2: Validation of simulation models." Key Methodology: The Thermal Balance (Shaft Seal Drag):
Because the standard’s authors admitted: "Heat dissipation is too dependent on real-world conditions to make a rigid standard." A TR allows for and empirical back-calculations rather than prescriptive rules. In practical terms, this means the PDF includes:
The full title of the document is It was first published in August 2001 , confirmed as still valid in October 2013 , and remains the current edition today.
The document focuses on the balance between power loss (heat generation) and heat dissipation to the environment.