Title : Investigating the tribology and anti-wear properties of diesel-vegetable oil blends
Abstract:
Normal lubricants such as petroleum, coal, and natural gas are limited and will continue to deplete due to high fuel consumption worldwide; therefore, bio-lubricants can be considered as alternatives. In this presentation, we examine the lubrication and anti-wear properties of diesel-arugula oil and diesel-sesame oil blends using a four-ball wear testing machine. The results showed that with the increase in rotational speed, the friction coefficient for all fuel mixtures decreased, which may indicate increased wear and polishing of surfaces at the end of the loading phase due to high rotational speed. Additionally, with the increase in rotational speed, the wear scar diameter for all fuel mixtures increased, which is due to the rise in the variable friction coefficient of the fuel mixture during the initial stages of the loading cycle.
In general, for all fuel mixtures, the wear scar diameter decreases with an increase in the percentage of oil, indicating improved lubrication conditions and anti-wear properties of the fuel mixture due to the presence of fatty acids in the structure of the oils. Also, with the increase in the percentage of oil in the fuel mixture, in addition to the reduction in the wear effect diameter, the shape of the scratches and grooves on the surface of the balls has also decreased, indicating improved lubrication conditions. Furthermore, arugula oil exhibits a lower coefficient of friction variation during the initial loading periods due to its superior lubrication and anti-wear properties. Moreover, the effect of mixtures containing arugula oil on reducing the wear effect diameter is greater than that of sesame oil.
