Experimental study on frictional characteristics of tungsten carbide versus carbon as mechanical seals under dry and eco-friendly lubrications

Tribological Performance of Friction Pairs with Different Materials and Bi-Composite Surface Texture Configurations

“…An evident Rayleigh step was formed by the conventional spiral grooves that offset part of the vortex the was formed by fluid backflow because of the longer fluid domain wall, thus a vibration suppression effect was created. From the above testing results, the following results can be concluded: (1) The average friction coefficient of the 2-B1 group (0.060) is smaller than that of the 1-A1 group (0.071), and the average friction coefficient of the 2-B2 group (0.129) is larger than that of the 1-A1 group; (2) For micro-dimple textures (triangular and elliptical), the shape is a key factor for affecting the tribological performance of a mechanical seal; (3) The effect of the microgroove texture (conventional spiral grooves) is mainly reflected in the hydrodynamics, which can improve the stability of a mechanical seal.…”

“…The rest was in a semi-detached state. In summary, the wear of M120D was mainly composed of three processes: (1) The texture edge has a cutting effect on the surface of M120D; (2) Adhesive wear occurred on the untextured part of the surface of the friction pairs; (3) The secondary wear was caused by the debris inside the texture. Figure 10 shows the friction coefficient of the 3-C1, 3-C2, and 3-C3 groups with the test running time.…”

“…Most studies have been based on experimental and simulation analyses. Shankar et al [1] designed test equipment to conduct end surface friction and wear tests on mechanical seals with tungsten carbide and resin-impregnated carbon pairs. The friction characteristics of different lubrication conditions could be analyzed by this equipment.…”

Experimental studies on viscosity, thermal and tribological properties of vegetable oil (kapok oil) with boric acid as an additive

“…Over a period of 30 years, boric acid was used as additives in solid lubricant to reduce the friction and wear during the sliding contact [21]. Special materials such as tungsten, graphite disulphate, zinc [22], ferrous, copper and boric acid [23,24] were also used as an additive with the lubricant.…”

Tribological analyses of a new optimized gearbox biodegradable lubricant blended with reduced graphene oxide nanoparticles

“…Thus, researchers have been studying the effects of friction modifiers and additives in industrial lubricants. 51–59 Additives are added in the lubricants as packages which are used for performance enhancement of the lubricant. Out of all the kinds of additives, solid additives are commonly used due to their applications in high contact loads and low sliding speeds as they prevent lubricant starvation at tribo pairs.…”