Análise sistemática da troca do material de uma bucha de mancal da bomba de recirculação de GAA (Global Acrylic Acid)

Abstract

The present assignment proposes to present a systematic analysis about the replacement of the material of the bearing bushing of an acrylic acid recirculation pump in a superabsorbent polymer company. Starting with the process of prior analysis of the failure, following to define its likely causes and thus carrying out the analysis of the replacement of the pump material. The work presents the result of actions taken, based on analyzed data, to improve the reliability of an acrylic acid recirculation pump through the Root Cause Analysis (ACR) of the industrial unit producing superabsorbent polymer. For the analysis, the Ishikawa diagram was used, which supports the ACR, and technical reports about the failure, historical data of the industrial unit and its equipment were used. The merit index method developed by Professor and Engineer Ashby, being widely used in material selection processes in the most diverse applications. Ishikawa's root cause analysis and Ashby's material selection methods along with its application principles are at the heart of the work, in order to lead the entire analysis process up to the presentation of actions and their results. In the end, the results presented were positive, since the material selected for the construction of the bearing bushing performed well on the equipment, which is still flawless up to the present moment, however it was verified by the methodologies used that although PEEK meets the requirements needed for application the Polycarbonate has a better cost / benefit ratio making it the best material option for making the bushing. With this, it was possible to prove the effectiveness of the root cause analysis and material selection methods, corroborating with positive and satisfactory results for the client.