With the aim of improving tribological properties low-viscosity gear oil for automobiles, an acrylate dialkyl dithiophosphoric acid (ADDP) with strong polar groups was synthesized. The behavior ADDP combined molybdenum dithiocarbamate (MoDTC) in systematically studied. Tribological performances containing different additives were assessed using a four-ball friction and wear tester. obtained characteristics reveal that MoDTC can significantly improve antiwear antifriction performance oil....

In order to improve the tribological properties of calcium sulfonate complex–polyurea grease, WS2 nanoparticles were used as additives prepare grease. The behavior grease on GCr15 surface was systematically studied. results indicate that can significantly extreme pressure performance When concentration is 2 wt.%, friction coefficient decreases by 14.94%, and maximum nonseizure load PB increases 31.41%. As temperature increases, wear rate first decrease then increase. This mainly attributed...

AbstractTo investigate the effect of erucamide on tribological properties GCr15 steel in this study, polyurea grease is prepared with different concentrations as additive. The behavior surface studied using a reciprocating friction test. results show that 1.5 wt% has best property and friction-induced vibration noise suppression capability. This attributed to formation lubricating film transition region surface, which maintains relatively stable state, maximum thickness 3.91 μm.Keywords:...

To expand the applications of polymer friction modifiers in low viscosity oils suitable for hybrid power systems, tribological properties five kinds oil samples at different temperatures were studied, which compounded with Perfad XG 2500, molybdenum dialkyl dithiocarbamate (MoDTC), zinc dithiophosphate (ZDDP). When 2500 is used alone, it forms a brush-like surface film temperatures, can provide lower initial friction. With rise temperature, its antifriction effect decreases significantly,...

Polyurea complex thickener was introduced into calcium sulfonate grease to prepare a new type of grease. The microstructure, rheological properties, and tribological properties greases were studied in detail. experimental results show that the combination soap polyurea can form system, which combines layered structure rod-shaped thickener. thermal decomposition temperature is reduced, but its lubrication are significantly improved. Their synergistic effect related special structural skeleton system.

Abstract Polyurea complex thickener was introduced into calcium sulfonate grease (CSCG) to prepare a new type of grease. The microstructure, rheological properties, and tribological properties greases were studied in detail. experimental results show that the combination soap polyurea can form system, which combines layered structure rod-shaped thickener. thermal decomposition temperature is reduced, but their fluidity improved friction coefficient lower. Their synergistic effect related...

Abstract The present study investigates the effect of friction parameters on tribological properties erucamide as an additive in grease GCr15 steel, well sensitivity to these parameters. An orthogonal test design is utilized sample parameters, followed by construction a Kriging model articulate relationship between and designated objectives (average coefficient wear volume). Non-dominated Sorting Genetic Algorithm II (NSGA-II) used optimize verify accuracy model. Monte Carlo method analyze...

In order to realize the online monitoring of automotive engine lubricating oil, a method based on Internet Things technology is proposed. This uses self-organizing neural network fuse original multidimensional feature data obtain fusion value. The Parzen window used formulate limit value value, and samples are divided into three states: normal, warning, abnormal. Weka software extract rules from oil data. can identify different wear state information spectral data, knowledge rules, use them...

In order to further extend the service life of calcium sulfonate complex–polyurea grease (CSCPG) while ensuring its tribological performance, this article starts with production raw materials and preparation process explores factors that significantly affect performance CSCPG based on unreplicated saturated factorial design (USFD). The Kriging prediction model is used along optimization objectives friction coefficient life, nondominated sorting genetic algorithm II (NSGA-II) was for a...

To evaluate the impact of various proportions erucamide and N-phenyl-α-naphthylamine on grease’s tribological performance for roller bearings, lithium complex grease (LCG) polyurea (PG) were prepared with (0,0), (0,3), (1,2), (2,1), (3,0). An investigation was conducted into microscopic structures ten greases their effects friction coefficients wear scars GCr15 steel. These findings validated through bearing torque tests. The results indicate that addition 2 wt. % 1 to PG/LCG significantly...