Estudo de caso em lubrificação de engrenagens de acionamento de moinhos de mineração

Abstract

The mills used in mining are large and robust equipment that require high power for their operation, as the drive gears that have high load transmission, high contact friction generating heat, and therefore require constant attention of maintenance, especially lubrication, which must be appropriately. Lubrication is very important to prevent attrition, faults or breaks where there is friction between two metal surfaces such as the sides of the teeth of a gear pair. In ALUMAR had necessity to replace the grease of the drive gears in the bauxite mills, for an oil with excellent properties for this type of work; this in addition to being beneficial to gears is able to reduce lubrication costs of this equipment. The monograph show relevant parameters of replacing the grease in the oil, such as temperature, vibration and mass consumption, through various tests and technical reports analyzed using a historical tracking data with grease and after application of oil, which after the use of this new lubricant of gears, there was a reduction of temperature 7 ° C, and vibration and mass consumption was reduced by 50%, aiming at the validation and approval of new fluid for subsequent application in all other mills