Seleção de materiais para rotor de bomba de combustível

Abstract

This work focuses on the materials selection methodology for application in fuel pump rotors, utilizing the Ashby Methodology to explore alternatives to Polyphenylene Sulfide (PPS) with 32.5% fiberglass and 32.5% mineral filler, a compound widely used in the industry for this application. The goal is to overcome challenges associated with the processing and application of this material without compromising its essential chemical and physical properties. The critical injection stage uses complex molds, becoming particularly challenging due to the high mineral filler content, prone to mold retention, resulting in carbonization and impairing the efficiency of the process. Mold compromise leads to extensive rework, rendering the effectiveness of injection molding ineffective and negatively impacting rotor manufacturing. Another crucial challenge is material swelling, particularly critical for rotors, as even slight swelling can result in severe blockages and operational failures. Faced with these challenges, the study, in addition to a substantial scientific review, turns to the Ansys Granta EduPack software to identify materials with the potential to overcome these difficulties, simplifying decision-making. The objective is to select an alternative material for rotors, maintaining functionality and reducing the filler content compared to the PPS compound used, while facilitating processing. This study not only proposes alternative solutions but also directly addresses specific challenges related to the manufacturing of this product, driving the development of more effective and sustainable strategies in materials selection for the automotive industry. Within this framework, the research results reveal that Phenol Formaldehyde (PF), reinforced with 45% high-strength glass fiber, stands out as a viable option for the challenges presented. Not only does it maintain, but it also enhances mechanical performance while reducing production costs.