Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
COSTS ANALYSIS BETWEEN PREDICTIVE AND CORRECTIVE MAINTENANCE FOR AN AGRIBUSINESS MACHINE
Submission Author:
Leonardo Rosa Ribeiro da Silva , MG
Co-Authors:
Leonardo Rosa Ribeiro da Silva , Gustavo Henrique Nazareno Fernandes, Felipe dos Anjos Rodrigues Campos, Pedro Henrique Pires França, Luiz Eduardo Rodrigues Vieira , Felipe Chagas Rodrigues de Souza, Augusto Peixoto
Presenter: Leonardo Rosa Ribeiro da Silva
doi://10.26678/ABCM.COBEM2019.COB2019-1760
Abstract
In this work, it was analysed a real situation where Predictive Maintenance -PDM strategy was applied for a sugarcane agribusiness tractor. This machine was operating under severe working conditions, 24 hours daily, directly in contact with dust, earth, stones, and so forth. The PDM was performed periodically (500 hrs. interval), measuring many parameters such as Compression Rate - CR, used as a reference here. To verify diesel engine conditions, it was used a manometer, brand Planatc, model MC-2000, to measure CR of the engine six cylinders. In one of the inspections, it was noticed a low CR in cylinder 6, overloading parallel cylinder 1, leading to immediate machine stop and corrective maintenance, in order to avoid damages accumulation. A Failure Mode and Effect Analysis to discovery root problem noticed that the primary filtering element was broken, allowing impurities to enter the engine system. After services performed, PDM total costs were stipulated and compared to a hypothetical situation where the machine had had to be kept running until failure, then having to do a Corrective Unscheduled Maintenance - CUM. The analysis showed PDM to be a much better-chosen strategy. The cost-benefit ratio was estimated in about ~10x, disregarding the losses of stopped machine time: 2 days for PDM and 10 days for CUM.
Keywords
Predictive maintenance, corrective maintenance, costs, agribusiness
