Numerical analysis and optimization of surface textures for a tilting pad thrust bearing

Gropper, Daniel; Harvey, Terry J.; Wang, Ling

doi:10.1016/j.triboint.2018.03.034

Cited by 68 publications

(53 citation statements)

References 22 publications

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“…Texture shape and size play a very important role in improving the bearing performance [55]. Many texture shapes like square [56][57][58]73], circular [59][60][61], elliptical [54,62,63], circumferential grooved [64,134], radial grooved [64][65][66] as shown in Fig. 7 are used to improve thrust bearing performance.…”

Section: Slider Bearing With Surface Texturingmentioning

confidence: 99%

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

et al. 2020

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Numerous published studies on the non-wettable surfaces with surface texture and slip conditions have been reviewed comprehensively to evaluate the performance of hydrodynamic bearings from last two decades. The recent numerical and experimental studies have been explored to observe the individual and combined influence of surface texture and slip. A variety of texture shapes and optimized slip zone profiles have also been discussed in this article. It has been observed from the literature that a suitable combination of modified slip and the conventional no-slip zone is effective in improving dynamic and static performance of hydrodynamic bearings. Many experimental studies also revealed that micro-scale textures are significantly capable of improving the tribological performance. Moreover, slip boundary condition is more beneficial at low and medium eccentricity ratios.

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Section: Slider Bearing With Surface Texturingmentioning

confidence: 99%

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

et al. 2020

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“…Many other researchers focused on parametric studies, in particular for the analysis of surface textures. Since the early works of Etsion and coworkers [3,7] the parametric approach has been the widely used for the optimization of textures in several kind of application, such as 1D slider bearings [8,9], 2D slider bearings [10], Piston-Liner Contacts [11,12], thrust bearings [13] and pin-on-disc tribometers [14]. In some cases, the optimization of surface texture for 1D slider bearings has been also performed by means of analyt-ical solutions [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Adjoint optimization of surface textures in mixed lubrication regime

Codrignani¹,

Savio²,

Pastewka³

et al. 2020

Preprint

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In this work we assess the applicability of the adjoint optimization technique for determining optimal surface topographies of two surfaces in relative motion in presence of a thin lubricant films that can cavitate. Among the existing numerical tools for topology optimization in engineering problems, the adjoint method represents a promising and versatile technique, which can also be applied to the field of full film tribology. In particular, the design of surfaces with complex textures can thoroughly benefit from this method, as it allows dealing with a large number of degrees of freedom at low computational cost. We show that this optimization method can be successfully applied to cavitating lubricant flows such as in pin-on-disc tribometers, giving the possibility to extend the results also to other typical applications such as journal and slider bearings. It is shown that the adjoint method can optimize the whole gap height distribution point by point in a more efficient way than traditional optimization approaches and parametric studies. In particular, thanks to the sensitivity analysis the adjoint method is able to find the placement and depth profile of each texture element.

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“…Zhang studied the friction force of surface texture parallel sliders with different morphologies, and found that the hydrodynamic lubrication performance of circular textures is better with a lower friction coefficient [14]. Gropper analyzed the performance of bearing with variation of texture area and textured depth on surface determining that the optimum texture depth should be slightly less than the minimum film thickness of unreformed bearing, and that there existed an optimum texture depth and density with low friction existed [15]. Wang conducted research on texture density, and discovered that the friction force reduced favorably with a texture density of 5%~13%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Texture on Energy Consumption for High Frequency Hydraulic Impact Piston Pair

Mo¹,

Guo²,

Yan-ping³

et al. 2020

Preprint

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Limited by the influence of the traditional clearance seal structure on the leakage and friction loss of the piston pair, the energy utilization ratio of the hydraulic impactor is difficult to improve. As such, a novel clearance seal structure with cylindrical texture for the impact piston is proposed to solve it. Considering the leakage and friction loss of impact piston pair, an energy consumption evaluation index is put forward. Based on the average Reynolds equation, an energy consumption analysis model for a textured high-frequency hydraulic impact piston pair is established, and the influence of piston texture parameters for the YG45 hydraulic impactor on energy consumption under rated working conditions is studied. The results show that energy consumption of an impact piston pair accounts for 29.77% of total energy loss. The variation of area ratio textured makes the ratio of energy consumption to the piston pair decline 1.32%~10.98%, where the optimum area rate textured is 0.64 ~ 0.7. The variation of depth ratio textured leads to the reduction of the ratio of energy consumption to piston pair by 3.21% ~ 5.68%, where the optimum depth ratio textured is 1 ~ 1.1.The texture structure of the piston pair significantly reduces the energy consumption of the impact piston pair, and it is an effective approach to avoid the design dilemma for the conventional impact piston pair.

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Numerical analysis and optimization of surface textures for a tilting pad thrust bearing

Cited by 68 publications

References 22 publications

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

Adjoint optimization of surface textures in mixed lubrication regime

Effect of Texture on Energy Consumption for High Frequency Hydraulic Impact Piston Pair

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