Qualitative potentials of surface textures and coatings in the performance of fluid-film bearings: a critical review

Sharma, Nitin; Verma, Ravi; Sharma, Sumit; Kango, Saurabh

doi:10.1088/2051-672x/abdda0

Cited by 15 publications

(8 citation statements)

References 120 publications

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“…Many researchers have emphasized on adoption of partial surface textures instead of full textures by optimally utilizing other crucial parameters such as location, size, geometry etc. of the textures [1][2][3][4][5][6][7][8][9][10]. Researchers have also carried out experimental studies on the hydrodynamic bearings to understand the bearing performance parameters under the real operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Temperature and Frictional Behaviors of Textured Journal Bearings

Kango¹,

Sharma²,

Sharma³

et al. 2022

Tribol. Ind.

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Experimental work provides a greater insight into the performances of journal bearings under actual operating conditions. Moreover, experimental findings also provide a platform for validation of numerical model based results and helps to point out suggestions needed to pursue further research. This article has been written in the direction of providing few factual experimental observations using the fabricated bush bearings having conventional, full textured (0⁰ to 360⁰) and half textured (0⁰ to 180⁰ and 180⁰ to 360⁰) bores. The textured bores involving cylindrical dimples were fabricated using electric discharge machining (EDM). Experiments were conducted at two loads (load per unit projected area = 0.3 and 1.5 MPa) and two journal speeds (2 and 5 m/s) employing SAE-30 lubricating oil. The experimental results revealed that the bearing with textures lying in the converging zone (0⁰ to 180⁰) yielded maximum reduction in coefficient of friction as compared to conventional (smooth) and other textured cases considered herein. Temperature rise with this textured bearing (0⁰ to 180⁰) also found less among all the textured bore cases.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Temperature and Frictional Behaviors of Textured Journal Bearings

Kango¹,

Sharma²,

Sharma³

et al. 2022

Tribol. Ind.

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“…The past two decades of literature studies show that micro-scale regular and random roughness patterns on the bearing bush provide localized variation in the lubricant film thickness and are effective in improving the tribological performance of hydrodynamic journal bearings (Gropper et al , 2016; Gachot et al , 2017; Rosenkranz et al , 2019; Sharma et al , 2021). Fowell et al (2006) investigated the mechanism of pressure rise in the lubricated textured surfaces.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of different slip zone locations on the lubrication performance of textured journal bearings

Arif

Kango

Shukla

2021

ILT

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Purpose This study aims to purpose the suitable location of slip boundary condition and microscale surface textures to enhance the tribological performance of the hydrodynamic journal bearings. Design/methodology/approach Mass conserving Elrod cavitation algorithm with considering slip boundary condition has been used for predicting the static performance characteristics (load carrying capacity, coefficient of friction and volumetric inflow rate) of finite cylindrical shape textured journal bearings. Findings It has been observed that the full textured bearing with slip boundary condition in between 0°–180° circumferential region gives a significant reduction in the lubricant rupture zone. However, the introduction of textures up to the interface of slip and the no-slip region is increasing the load-carrying capacity and reduces the shear stress. This reduction in shear stress with combined slip and surface textures is effective in increasing the volumetric inflow rate of the lubricant. Practical implications The combined effect of slip boundary condition and surface texturing is increasing the scope of liquid lubricants in hydrodynamic journal bearings and further contributing toward the development of small-scale rotating machines. Originality/value The study related to the use of mass conserving Elrod cavitation algorithm for finding the optimum location of slip and surface texture zones has been found rare in the literature. Previous studies show that the mass conserving Elrod cavitation algorithm gives realistic results for textured bearings and its findings show good agreement with the experimental observations.

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“…Texture slender ratio and depth are shown to have significant influence and there exists an optimum limit on friction reduction. These tribological responses can be further improved by employing both the texture and the coating on mating faces [30].…”

Section: Introductionmentioning

confidence: 99%

Optimal design of surface texture in meso scale air journal bearing

Hingawe¹,

Bhore²

2021

Surf. Topogr.: Metrol. Prop.

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Meso scale air journal bearing has widespread application in miniaturized systems and there is a strong need to improve its tribological performance. Although surface texturing can improve its performance, very few studies have addressed this issue. Therefore, this paper investigates the influence of texture geometrical parameters on the tribological performance of meso scale air journal bearing. A numerical study is carried out in a thin-film model of the COMSOL 5.2 package. The effect of texture geometrical parameters viz. position, depth, orientation, and slender ratio on tribological characteristics such as load-carrying capacity and friction coefficient is first analyzed by response surface methodology based Box-Behnken design. Further, a multi-objective optimization study is carried out using grey relational analysis. For the optimum design, textured air bearing has obtained ACCEPTED FOR PUBLICATION

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Qualitative potentials of surface textures and coatings in the performance of fluid-film bearings: a critical review

Cited by 15 publications

References 120 publications

Experimental Investigations on Temperature and Frictional Behaviors of Textured Journal Bearings

Experimental Investigations on Temperature and Frictional Behaviors of Textured Journal Bearings

Investigating the effect of different slip zone locations on the lubrication performance of textured journal bearings

Optimal design of surface texture in meso scale air journal bearing

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