When the re:fiigerant R l34a is mixed with an ester oil and usea m compressor bearing lubrication, no EP action is experienced. The refrigerant contains no chlorine and the lubricant additives can not be chemically active like normal EP additives, not to deposit in and destroy the heat excha..>Jgers. The iubricant film thickness thus needs to be considerably larger for an Rl34a compressor beari...

The influence of temperature on the lubricating properties of neat water for tribopairs with varying bulk elasticity moduli and surface hydrophilicity, namely hard-hydrophobic interface (h-HB), hard-hydrophilic interface (h-HL), soft-hydrophobic interface (s-HB), and soft-hydrophilic interface (s-HL), has been investigated. With increasing temperature, the coefficients of friction generally inc...

To monitor the gradual wear process of gears, behavior at different lifetime phases has to be fully understood in theory. The traditional Archard’s model was mainly developed for dry contact. However, most gear transmission systems, gears normally work under mixed EHL regime, and two contact surfaces are separated by a thin film avoid asperity Therefore, is inappropriate estimate depth lubricat...

The tribological performances of the SiO₂/MoS₂ hybrids as lubricant additives were explored by a reciprocating ball-on-flat tribometer for AZ31 magnesium alloy/AISI 52100 bearing steel pairs. The results demonstrated that the introduction of SiO₂/MoS₂ hybrids into the base oil exhibited a significant reduction in the friction coefficient and wear volume as well as an increase in load bearing ca...

To reveal the lubrication performance degradation mechanism of slipper pair in high-pressure piston pump during early wear failure. The three-dimensional fractal function has been used to construct surface morphology slipper, and combined with oil film thickness equation establish a mixed model considering microscopic change process. Based on theory, method using parameters (fractal dimension <...