Influence of Geometric Shapes on the Hydrodynamic Lubrication of a Partially Textured Slider With Micro-Grooves

Ji, Jinghu; Fu, Yonghong; Bi, Qinsheng

doi:10.1115/1.4027633

Cited by 36 publications

(34 citation statements)

References 33 publications

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“…That is, both the dimensionless mesh-sizes of the finest mesh, DX and DY , are equal to 0.125. Therefore, the number of nodes of the finest mesh n 3 m can be calculated by the following equations (20) and (21)…”

Section: Methodsmentioning

confidence: 99%

Influence of short grooves on hydrodynamic lubrication of textured infinitely long sliders

et al. 2018

Advances in Mechanical Engineering

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The influence of geometrical parameters of the short grooves on the hydrodynamic lubrication is studied in this article. Based on Reynolds equation and Jakobsson-Floberg-Olsson cavitation theory, an analytical model is developed to investigate the hydrodynamic lubrication of the short grooves. The study employs a multigrid method to calculate the distribution of hydrodynamic pressure and the average pressure of textured surfaces. The results indicate that the interactions between neighboring short micro-grooves and the end effect on the hydrodynamic pressure should be considered in the process of numerical simulation. There exist the optimum values of horizontal spacing and short microgroove depth to maximize the hydrodynamic pressure. The average film pressure decreases with the increase in the vertical spacing, but it increases alongside the short groove width. The increase rate of the average pressure declines gradually as the short groove length grows. Therefore, hydrodynamic lubrication performance can be improved by optimizing the geometrical parameters of the short grooves according to operating conditions.

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Section: Methodsmentioning

confidence: 99%

Influence of short grooves on hydrodynamic lubrication of textured infinitely long sliders

et al. 2018

Advances in Mechanical Engineering

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“…In recent years, the possibility of enhancing the bearing performances by opening micro‐grooves in the bearing surfaces has attracted attention of many researchers, and they have performed many theoretical and experimental investigations. Most theoretical and experimental investigations explore micro‐grooved bearings using an incompressible lubricant . Fu et al .…”

Section: Introductionmentioning

confidence: 99%

“…Most theoretical and experimental investigations explore micro-grooved bearings using an incompressible lubricant. [1][2][3][4][5][6][7] Fu et al 1 investigated the load-carrying capacity of micro-grooved hydrodynamic parallel slider bearings by the multi-grid method. Their work showed that the load-carrying capacity increases with the increase of the groove width, but the load-carrying capacity increment decreases with the increase of the groove width.…”

Section: Introductionmentioning

confidence: 99%

“…Their work showed that the load-carrying capacity increases with the increase of the groove width, but the load-carrying capacity increment decreases with the increase of the groove width. Ji et al 2 utilised the multi-grid method to investigate the effect of the groove shape on the load-carrying capacity of hydrodynamic parallel slider bearings. They showed that the groove depth that maximises the loadcarrying capacity is dependent of the groove shape.…”

Section: Introductionmentioning

confidence: 99%

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Load performance analysis of three‐pad fixing pad aerodynamic journal bearings with parabolic grooves

Liu

Lü

Zhang

et al. 2015

Lubrication Science

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Three‐pad fixing pad aerodynamic journal bearings (TPFPAJBs) have been widely used in precision instruments due to their low friction, high stability and non‐pollution. In order to improve the load performance of TPFPAJBs, parabolic grooves are opened in the bearing pad surfaces. By opening parabolic grooves in various bearing pad surfaces, the effects of the orientation angle, distance, width and depth of the grooves on the load performance of micro‐grooved TPFPAJBs can be investigated. The numerical results show that the location of the micro‐grooved bearing pads can greatly affect the load performance of micro‐grooved TPFPAJBs. When the given bearing pad surface is grooved, the effects of the bearing number and width‐to‐diameter ratio on the load performance of micro‐grooved TPFPAJBs can be studied. The bearing number and width‐to‐diameter ratio are observed to have significant influences on the load performance of micro‐grooved TPFPAJBs. Copyright © 2015 John Wiley & Sons, Ltd.

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“…Surface texturing has a remarkable influence on the tribological properties of friction pair surfaces [1][2][3]. It can be produced by Laser processing technology [4], reactive ion etching technology [5], photochemical machining technology [6], machining technology, and so on.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Laser Microtextured Surface Bonded With Composite Solid Lubricant at High Temperature

Hua

Sun

Zhang

et al. 2016

Journal of Tribology

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A combination technology of the solid lubricant and the laser surface texturing (LST) can significantly improve the tribological properties of friction pairs. The plate sample was textured by fiber laser and composite lubricant of polyimide (PI) and molybdenum disulfide (MoS 2 ) powders were filled in the microdimples. Sliding friction performances of micron-sized composite lubricant and nano-sized composite lubricant were investigated by ring-plate tribometer at temperatures ranging from room temperature (RT) to 400 C. On the one hand, the results of the micron-sized composite lubricant show that the friction coefficient of the textured surface filled with composite lubricant (TS) exhibits the lowest level and the highest stability compared to a textured surface without solid lubrication, smooth surface without lubrication, smooth surface burnished with a layer of composite solid lubricant. The better dimple density range is 35-46%. The friction coefficients of the sample surface filled with micron-composite solid lubricant with the texture density of 35% are maintained at a low level (about 0.1) at temperatures ranging from RT to 300 C. On the other hand, the results of the nano-sized composite lubricant show that these friction properties are better than those of MoS 2 -PI micron-sized composite. The friction coefficients of MoS 2 -PI-CNTs nano-sized composite solid lubricant are lower than those of the MoS 2 -PI composite lubricant at temperatures ranging from RT to 400 C. In addition, the possible mechanisms involving the synergetic effect of the surface texture and the solid lubricant are discussed in the present work.

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Influence of Geometric Shapes on the Hydrodynamic Lubrication of a Partially Textured Slider With Micro-Grooves

Cited by 36 publications

References 33 publications

Influence of short grooves on hydrodynamic lubrication of textured infinitely long sliders

Influence of short grooves on hydrodynamic lubrication of textured infinitely long sliders

Load performance analysis of three‐pad fixing pad aerodynamic journal bearings with parabolic grooves

Tribological Properties of Laser Microtextured Surface Bonded With Composite Solid Lubricant at High Temperature

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