
Mediante os avanços tecnológicos, a globalização do mercado e a demanda por produção com menores custos, as organizações atuais visam a uma maior produtividade, requerendo equipamentos com alta confiabilidade e disponibilidade. Surge, então, a necessidade de maximizar o tempo em operação da planta industrial, de modo a garantir maior produção. O objetivo deste trabalho foi realizar uma análise de falhas de equipamentos utilizados no setor de moagem de cana-de-açúcar de uma usina sucroalcooleira. O método de pesquisa aplicado consistiu no estudo de caso. Para as análises, foi realizada a coleta de tempos até a falha dos equipamentos e, para a modelagem dos dados, utilizou-se o software ProConf. A modelagem da confiabilidade e da taxa de falhas dos equipamentos foi feita de modo a identificar a fase de vida destes. A distribuição que melhor se ajusta aos tempos é a Weibull. Foi possível gerar os gráficos da confiabilidade e da taxa de falhas, identificando que os equipamentos se encontram na fase de vida senil, sendo mais indicada a manutenção preventiva. Verificou-se que a folga excessiva entre os elementos rolantes que compõem o sistema do balanção era a principal causa de falhas no guincho Hillo, sendo então projetado um Anel-Guia para o cabo, de modo a evitar mais problemas.Palavras-chave: Confiabilidade. Fase de vida. Manutenção preventiva. Modelagem. Weibull.Analysis of equipment failures and the importance of maintenance planning: an application in a Sugar and alcohol plantAbtractThrough technological advances, the globalization of the market and the demand for production at lower costs, today's organizations aim for greater productivity, requiring equipment with high reliability and availability. The need arises to maximize the time in operation of the industrial plant in order to guarantee greater production. The objective of this work was to perform a failure analysis of equipment used in the sugarcane milling sector of a sugar and ethanol mill. The applied research method consisted of the case study. For the analysis, the collection of times until equipment failure, and, for modeling of the data, the software ProConf was used. The modeling of the reliability and failure rate of the equipment was done in order to identify the phase of their life. The distribution that best fits the times is Weibull. It was possible to generate the reliability and failure rate graphs, identifying that the equipment are in the senile life stage, and preventive maintenance is more indicated. It was found that excessive play between the rolling elements that make up the swinging system was the main cause of failure in the Hillo winch, and a guide ring was designed for the cable in order to avoid further problems.Keywords: Reliability. Life phase. Preventive maintenance. Modeling. Weibull.
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