Effect of MoS₂ and graphite on friction properties of bronze oil bearing

By changing the contents of MoS₂ (mass fraction 1.0%~2.0%) and graphite (mass fraction 0~1.0%), the bearing pressure limit value of bronze oil bearing at the certain sliding linear velocity was measured, the effects of MoS₂ and graphite contents on the mechanical and frictional properties of bronze oil bearing were studied. The results show that, the limit value of load×linear velocity (pv) for the oil bearings decreases with the increase of MoS₂ content without graphite addition, and the bronze-1MoS₂ (1.0%MoS₂, mass fraction) oil bearing has the highest pv value of 2.940 MPa·m·s^-1. In the case of adding graphite and MoS₂ at the same time, the friction coefficient of the oil bearing decreases with the increase of the graphite content, and the bronze-1MoS₂-1graphite (1.0%MoS₂ and 1.0%graphite, mass fraction) oil bearing has the lowest friction coefficient of 0.038. Graphite can improve the friction properties of oil bearings, but it may greatly reduce the mechanical properties of oil bearings.