Influence of Fluid Slip on Operation Characteristics for High-Speed Spiral Groove Seal Ring

Zhao, Xin; Yuan, Shi Hua; Wei, Chao

doi:10.1007/s11249-018-0991-4

Cited by 15 publications

(7 citation statements)

References 22 publications

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“…The study of Zhang et al (2014) on water-lubricated journal bearing a suitable combination of slip/no-slip surfaces tend to improved tribological performances with higher load-carrying capacity and lower interfacial friction. Zhao et al (2018) proposed a modified hydrodynamic lubrication model of liquid film seal based on apparent local slip theory and JFO cavitation theory, and the experimental results are in good agreement with the simulation results.…”

Section: Introductionsupporting

confidence: 56%

Effect of slip position on the hydrodynamic performance of liquid film seal

Wang

et al. 2020

ILT

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Purpose The purpose of this paper is to investigate the effect of slip position on the performance of liquid film seal. Design/methodology/approach A mathematical model of liquid film seal with slip/no-slip surface was established based on the Navier slip model and JFO boundary condition. Liquid film governing equation was discretized by the finite difference method and solved by the SOR relaxation iterative algorithm and the effects of slip position on sealing performance are discussed. Findings The results indicate that boundary slip plays an important role in the overall performance of a seal and a reasonable arrangement of slip position can improve the steady-state performance of liquid film seal. Originality/value Based on the mathematical model, the optimal parameters for liquid film seal with boundary slip at groove are obtained. The results presented in this study are expected to provide a theoretical basis to improve the design method of liquid film seal. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2020-0082/

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Section: Introductionsupporting

confidence: 56%

Effect of slip position on the hydrodynamic performance of liquid film seal

Wang

et al. 2020

ILT

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“…Therefore, a solidified superslippery surface was constructed; however, the SLIPS was related to a liquid-liquid interface, whereas the solidified superslippery surface refers to a solid-liquid interface in which the slip velocity is slower than the SLIPS [51]. Moreover, other studies [28,52] have indicated that boundary slip can be enhanced via liquid film cavitation (continuous formation of a gas layer between the solid and liquid). Compared with the resident gas layer in the micro-nano structure, this cavitation gas layer can exist for an extended time in the course of normal equipment operation and can reduce the manufacturing cost of the hydrophobic surface, which could possibly be a promising research direction.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of no-wear super-slip design of tribo-pair in load lifting and friction reduction

Hu¹,

Wang²,

Yang³

et al. 2023

Preprint

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The concept of “super-slip design” is used to investigate the influence of multiple factors on the opening and frictional forces of a tribo-pair with microscale grooves. The results demonstrate that significantly improving the load-carrying capacity and reducing the viscous friction can be simultaneously realised by super-slip modification of the bottom surface of the hydrodynamic groove as a result of the joint action of the super-slip surface, groove geometrical parameters, and operating conditions. This is expected to further enhance the load-carrying capacity and reduce friction by applying shear stress on the interface of the liquid film and superslippery surface of the groove bottom. The superslippery surface does not fail because of rubbing, and the logical relationship between the performance parameters and groove depth changes unusually under this design.

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“…Organic liquids are commonly used in engineering lubrication, for instance, lubricants can form efficient lubricant films between mechanical shear pairs to maintain operation at a very low friction even at high rotation speed and high pressure, such as gear, [1][2][3] seal ring, [4][5][6][7] wet clutch, 8,9 and so forth.…”

Section: Introductionmentioning

confidence: 99%

Flow and slip process of Santotrac 50‐based lubricant under high shear by molecular dynamic simulation

Zhao

Wei

Yin

et al. 2022

Lubrication Science

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We investigate flow and slip behaviour of Santotrac 50 molecules under high shear in Couette cell by means of Molecular Dynamic simulation to understand reduced friction force. Molecular chain stretches and oriented to shear direction, and move. Slip starts on metal surface at 2 Â 10 8 s À1 , and increases with shear rate. Slip length keeps scale at nanometre. Molecular conformation and occurrence of slip both indicate a reduced shear stress. Furthermore, when changing wettability, slip length increases in power law and thus decreases shear stress greatly. Occurrence of low-density region near surface can explain slip. And thus, we extended apparent slip model, which divided lubricant into liquid layers with different viscosities, to elucidate the relationship between molecule distribution inner layer and slip on surface influenced by shear velocity and wettability. Above all, our research sheds light on flow and slip behaviour of complex fluid and can be applied in improving lubrication property.

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Influence of Fluid Slip on Operation Characteristics for High-Speed Spiral Groove Seal Ring

Cited by 15 publications

References 22 publications

Effect of slip position on the hydrodynamic performance of liquid film seal

Effect of slip position on the hydrodynamic performance of liquid film seal

Mechanism of no-wear super-slip design of tribo-pair in load lifting and friction reduction

Flow and slip process of Santotrac 50‐based lubricant under high shear by molecular dynamic simulation

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