Tribological Characteristics and Residual Tensile Strength of Wire Rope with Different Composite Greases at Normal and Low Temperatures

Abstract

To explore the tribological characteristics and residual tensile strength of winding rope with different composite greases in a low-temperature environment, tests were carried out on a self-made temperature-controlled friction tester. The results show that at normal temperature, the friction coefficient of rope lubricated by different composite greases is stable with a change of sliding distance. When the rope is lubricated by grease with multilayer graphite, there is a positive correlation between the friction coefficient and the friction temperature rise. At low temperature, the friction coefficient of the rope lubricated by the composite grease, except for IRIS + 4%MG, is higher than that at normal temperature. Secondly, from the 3D topography, fewer wear marks on the rope at room temperature are smaller than those at low temperature. The wear area and wear depth of the rope lubricated by the composite greases at low temperature are higher than those at room temperature. Finally, the residual tensile strength of rope lubricated with different composite greases at low temperatures is less than that at normal temperatures. In conclusion, compared with the original grease, the composite grease used in this test cannot reduce the wear of the rope at low temperature but can reduce the wear at room temperature.