A mixed lubrication model of a rotary lip seal using flow factors

The Effect of Wear on the Performance of a Rotary Lip Seal

“…Consequently, the leakage rate with this configuration is equivalent to the reverse pumping rate of the seal. This configuration is consistent with the flooded boundary conditions of the mixed lubrication model [12], although it deviates from the actual operating conditions when starvation occurs. The leakage from the oil chamber is collected by the oil-collecting cup and measured using a JJ series electronic scale with a resolution of 0.01 g. A JN338F static torque sensor is connected to the chamber to measure the friction torque.…”

“…The preliminary research effort has been finished, laying a foundation for this study. A mixed lubrication model of a rotary lip seal using flow factors has been established, which is used to calculate the pumping rate and friction torque [12]. The effect of the lip surface asperities is taken into consideration in the model by using a statistical approach.…”

“…From Ref. [12], the static contact pressure and contact width are input parameters for the previously described mixed lubrication model. By using a trilinear coordinate measuring instrument, the variation of the sealing lip profile with wear time is obtained.…”

Mixed lubrication of soft contacts: An engineering look

“…[38][39][40][41] These models are particularly useful for treating the contact of hard materials. 27,28,42,43 For the soft materials, the deformation of the asperities is generally elastic and the original GW model provides reasonable results as documented in Kim et al, 21 Bohan et al, 22 and Guo et al 23 Accordingly, in the current study, we utilize the GW model as an engineering approach to evaluate the behavior of surface asperities in soft EHL.…”

“…14,15 Within the context of mixed EHL, the modified Reynolds equation by Patir and Cheng 16 has been utilized in soft contacts to predict the changes in the lubricant flow due to the surface roughness. [17][18][19] For modeling the behavior of asperities, the statistical micro-contact model by Greenwood-Williamson known as GW 20 has been used in some studies, [21][22][23] while the fractal models have been utilized in some other studies. [24][25][26] In the present study, the line-contact mixed elastohydrodynamic lubrication of soft materials is studied.…”