Optimising the selection of working machine gear lubricant oil viscosity to maximise gear meshing durability

The paper presents a systematised approach to the selection of optimum viscosity of gear lubricant for drives of working machines used in civilian and military areas. Traditional literature procedures are characterised for determining the required oil viscosity according to the hydrodynamic theory (HD theory), and procedures based on the theory of elastohydrodynamic lubrication (EHD theory) are also presented. Nomograms developed by the authors allow to determine the dimensionless friction parameter resulting from the physical nature of the frictional contact in the lubricated gear meshing. The relationship between this parameter and the main types of tribological wear (abrasion, contact fatigue and seizure) of the gear teeth is demonstrated.

---

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).