Fiabilitate şi Durabilitate (May 2019)
THE VERIFICATION BY CALCULUS OF THE TRANSMISSION OF THE EXTRACTION MACHINE'S REDUCER FROM THE OLD PIT WITH SKIP – LONEA MINIG PLANT
Abstract
The extraction machine includes as components a cylindrical reducer with two steps, between the two electrical engines of 500 kW and the drive wheel. At the level of the revolution gear of the extraction machine, in time, damage to the gears' teeth has appeared, a phenomenon which manifests continually, without having a specific cyclicality, but permanently evolving. The breaking of the teeth of the gear's gears in the extreme areas of the dentition – areas that before breaking had a wear accented by contact usury (pitting) - is a deterioration phenomenon that depends on many factors, such as: the material of the gears, the size and the geometrical and kinematic elements of the dentition, the characteristics of the flanks' surface, the mechanical solicitations, the oiling and the quality of the lubricant. These problems that appeared regarding the exploitation of the reducer of the extraction machine lead to the decrease of functioning safety, and even to its halting. In this paper, we present the calculus for verifying the transmission of the extraction machine's gearbox the conclusions that can be drawn from it.
