| dc.description.abstract | In the turbomachinery applications, the geared transmission equipment are among the most affected bythe lube oil characteristics and properties In a gear system the oil is used in the fluid-dynamic bearings,journal and thrust, as well us to lubricate and specially to cool down the meshing gearsThe continued market demand to have more efficient machines, thus achieving energy savings andcarbon foot-print reduction, has motivated manufacturers to look for improvements even in area thathave rarely been explored like the lube oil viscosity in high performance and high efficiency lubricantsfor Turbomachinery applicationsThis paper is providing a comprehensive theoretical analysis of the potential impacts on a high-speedgear when a low viscosity oil is used, together with a validation through experimental dataThe authors used referenced formulas, tools and CFD models to predict the effects of low viscosity oil onscuffing service factor, rotor-dynamics, lube oil flow and power losses, where the windage contributionrepresent one of the most impacted factorFinally a comparative overview is presented to shown the gearbox rotor-dynamic behavior and itsperformances at full speed No Load and full speed Full Load with the low viscosity oil versus its behaviorwith an oil having a more common and diffused viscosity | |
