Tribology, according to recent reports, accounts for 23 per cent of global energy consumption. Improvements of only a few percentage points in energy-intensive industries such as rolling mills, paper industry as well as light and heavy traction can contribute substantially to the reduction of CO2 emissions and comply with the COP21 agreement in Paris. To cope with this, the industry has developed more powerful machines with smaller size (downsizing). In this scenario, it is important to ensure the operation of machines with new materials and new energy-saving lubricants. New materials were studied in the PhD activity: coating PEEK-based (for bearing application) and new methodologies to support the development of new lubricant products: FZG screening. Extensive tribological contacts with reinforced and unreinforced PEEK coatings were studied. Both in dry condition and in condition lubricated with grease and oil. The effect of friction reducers was studied in PEEK unreinforced couplings and excellent performance has been achieved with incredible reductions in friction without noticeable wear. Much remains to be studied about the formation of Tribofilm under varying load and temperature in this type of contact.
Secondo stime recenti, la perdite per attrito sono responsabili del 23 per cento del consumo energetico globale. Miglioramenti di pochi punti percentuali in industrie ad alta intensità energetica come i laminatoi, l’industria della carta e la trazione leggera e pesante possono contribuire in modo sostanziale alla riduzione delle emissioni di CO2 e rispettare l’accordo COP21 di Parigi. Per far fronte a questo problema, l’industria ha sviluppato macchine più potenti riducendo gli ingombri (downsizing). In questo scenario, è importante garantire il funzionamento delle macchine con nuovi materiali e nuovi lubrificanti a risparmio energetico. Nell’attività di dottorato sono stati studiati nuovi materiali: rivestimento(di cuscinetti) in PEEK e nuove metodologie per supportare lo sviluppo di nuovi prodotti lubrificanti: screening FZG. Il PEEK rinforzato è stato studiato sia in condizioni di asciutto sia in condizione di lubrificazione a grasso e ad olio. Il PEEK non rinforzato è stato studiato anche in presenza di riduttori di attrito e sono state ottenute prestazioni eccellenti con incredibili riduzioni dell’attrito senza usura evidente. Rimane ancora molto da studiare sulla formazione del Tribofilm al variare del carico e della temperatura in questo tipo di contatto.
Tribodesign of energy saving oils
MASSOCCHI, DAVIDE
2022/2023
Abstract
Tribology, according to recent reports, accounts for 23 per cent of global energy consumption. Improvements of only a few percentage points in energy-intensive industries such as rolling mills, paper industry as well as light and heavy traction can contribute substantially to the reduction of CO2 emissions and comply with the COP21 agreement in Paris. To cope with this, the industry has developed more powerful machines with smaller size (downsizing). In this scenario, it is important to ensure the operation of machines with new materials and new energy-saving lubricants. New materials were studied in the PhD activity: coating PEEK-based (for bearing application) and new methodologies to support the development of new lubricant products: FZG screening. Extensive tribological contacts with reinforced and unreinforced PEEK coatings were studied. Both in dry condition and in condition lubricated with grease and oil. The effect of friction reducers was studied in PEEK unreinforced couplings and excellent performance has been achieved with incredible reductions in friction without noticeable wear. Much remains to be studied about the formation of Tribofilm under varying load and temperature in this type of contact.File | Dimensione | Formato | |
---|---|---|---|
Davide_Massocchi_PhD_Manuscript.pdf
non accessibile
Dimensione
54.11 MB
Formato
Adobe PDF
|
54.11 MB | Adobe PDF | Visualizza/Apri |
I documenti in POLITesi sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/10589/207419