Análise de quebras prematuras de selos mecânicos aplicados em bombas centrífugas em fábricas de celulose

Abstract

In order to demonstrate the importance of the reliability study to reduce the number of premature breaks of mechanical seals installed in centrifugal pumps, the life data of a population of 770 components (mechanical seals) applied in a manufacturing plant of pulp installed in the south of the country. Based on this information, we analyzed the life data of this population, as a result, we determined the probability distributions with better adherence to the observed data. Knowing these distributions, it was possible to estimate the reliability functions R (t), the risk function h (t) and the MTTF. At the end of the study it was possible to understand how the failure of the seal occurs, what the existing failure mechanisms, what the relationship of the failures with the applications and thus to propose more in depth analyzes, RAM analysis, to the most critical cases and with more power of financial return to the company.