Optimization research on the lubrication characteristics for friction pairs surface of journal bearings with micro texture

Wang, Lili; Wei, Yujia; Yuan, Guo-teng; Geng, Huan

doi:10.1007/s11012-019-01015-1

Cited by 25 publications

(13 citation statements)

References 10 publications

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“…pillars, pits, grooves or grid, in a geometry or pattern on the target surfaces, LST has proved to be a one-step, fast, economic, accurate and easily-controlled way to tune the tribological performance of mechanical components (e.g. piston rings, seals, roller bearings and gears) (Uddin and Liu, 2016;Saeidi et al, 2017;Gachot et al, 2017;Marian et al, 2018;Marian et al, 2019;Grützmacher et al, 2019a;Grützmacher et al, 2019b;Galda et al, 2019;Wang et al, 2019;Vl adescu et al, 2019;Grützmacher et al, 2021;Kumar and Sharma, 2018). Under oil lubrication, texture units can act as an oil reservoir thus inducing a secondary oil effect, trap wear debris and contribute to an additional hydrodynamic pressure (Rosenkranz et al, 2019a).…”

Section: Introductionmentioning

confidence: 99%

Influence of Groove Dimensions on the Tribological Behavior of Textured Cylindrical Roller Thrust Bearings under Starved Lubrication

Long

Zhao

Jin

et al. 2021

ILT

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Purpose The purpose of this paper is to reveal the friction and wear performance of grooves textured cylindrical roller thrust bearings with different groove dimensions under starved lubrication. Design/methodology/approach The groove dimensions include: width of grooves (WOG, 50 µm, 100 µm and 150 µm), depth of grooves (DPOG, 7 µm, 11 µm and 15 µm) as well as groove deflection angle (GDA, 45°). A fiber laser marking system was used to prepare groove patterns on the raceways of shaft washers. The friction and wear properties of grooves textured bearings were researched through a vertical universal wear test rig using a customized roller bearing tribo-pair under starved lubrication. Static finite element analyses were conducted to reveal their surface stresses. Through the comprehensive comparison and analyses, the influence mechanism of grooves on the tribological behavior of cylindrical roller thrust bearings was proposed and discussed. Findings When grooves textured bearings run under starved lubrication, their average coefficients of friction (COFs) and wear losses are all significantly reduced and much lower than those of smooth group. The influence of DPOG on the COF curves is significant, while the influence of WOG on the COF curves is a little weak. The influence of groove dimensions on the surface stresses of grooves textured bearings is weak, whether the WOG or DPOG. In this work, when the WOG is 100 µm and the DPOG is 15 µm, its average COF and wear loss are both the lowest, 0.0066 and 0.61 mg, respectively. Compared with the data of smooth group, its friction coefficient is reduced by 75.3% and its mass loss is reduced by 95.8%, showing a significant improvement in this condition. Originality/value This work can provide a valuable reference for the raceway design and reliability optimization of rolling element bearings.

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Section: Introductionmentioning

confidence: 99%

Influence of Groove Dimensions on the Tribological Behavior of Textured Cylindrical Roller Thrust Bearings under Starved Lubrication

Long

Zhao

Jin

et al. 2021

ILT

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“…operating speed and supply pressure. It is also reported 11,[25][26][27] that the cap shape as well as the topographical cross section of micro-texture substantially influence the load-carrying capacity of bearings. Numerical and experimental simulation has been carried out by Yu et al 25 to determine the effect of geometric shape of dimple on the average fluid film pressure and coefficient of friction of slider bearing containing single micro-dimple.…”

Section: Introductionmentioning

confidence: 96%

“…In the last two decades, a substantially number of numerical and experimental studies has been reported, analyzing the usefulness of surface texturing [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] in fluid film bearings. It is widely accepted that the use of textured surface can be helpful in the design of high load sustaining fluid film bearings.…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis of rough surface hybrid thrust bearing with elliptical dimples

Kumar

Sharma

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Surface roughness is inherent to all machining processes. Therefore, even a high precision machining process renders micro-roughness to some extent on the surface of conventional materials. The asperities height of many rough engineering surfaces follows Gaussian distribution. The surface roughness on the bearing surface may significantly affect the bearing performance. Surface texturing is emerging as a new technique to improve the tribological behavior of the mating surfaces. Usually dimensions/height of micro-roughness is of order of the depth of surface textures in fluid film bearings. Neglecting micro-roughness while numerically simulating a textured surface bearing may generate inaccurate bearing performance data. In presented work, finite element simulation of textured surface hybrid thrust bearings has been performed. Surface texture is provided over thrust pad in the form of regular arrays of elliptical dimples. A parametric optimization is carried out to determine optimum attributes of elliptical dimple (axis, depth, texture length and orientation) so that the load-carrying capacity and fluid film stiffness should be maximized and film frictional power losses should be minimized. Use of textured surface (with optimum elliptical dimple attributes) results into a significant enhancement in load-carrying capacity (91.3%), film stiffness coefficient (+98.8%) and reduction in frictional power losses (−48.3%). It is also observed that elliptical dimple and micro-roughness (transverse orientation) generate synergistic effects in further enhancing the load-carrying capacity (+101.4%) and film stiffness coefficient (+112%) of the bearing.

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“…It has strict requirements for the "appropriate micro-geometry" texture to significantly improve the lubrication and friction conditions between the friction pairs and minimize wear. Shape and geometrical parameters (Suh, Chae et al 2010, Su, Huang et al 2019, Wang, Guo et al 2019) play a critical role in determining a surface texture's tribological properties. Considerable research has been conducted on texture parameter optimization: texture effects greatly rely on shape (Schäfer, Reinert et al 2018), size (Burlakova, Tyurin et al 2019), depth (Panigrahi and Sarangi 2020), density (Dan, Xuefeng et al 2020), area (Walker, Cinti et al 2019), and orientation (Yagi, Matsunaka et al 2021) of the texture.…”

Section: Introductionmentioning

confidence: 99%

A Study of Micro-Dimpled Groove Texture in Friction Reduction

Yuan

Liu

Park

et al. 2021

Preprint

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Friction control is a vital green technology for reaching sustainable development goals, and surface texturing is effective and efficient at reducing friction. In this study, a novel preparation scheme involving dimpled groove texture is proposed. A pulsed laser marking system is used to make the dimpled grooves. Due to the unique design and process to make the proposed texture, texturing time can be greatly minimized compared to the conventional micro-groove texture technology. A computational fluid dynamics (CFD) model that considers the dimple surface angle is employed to aid the design of the texture and to predict the performance of the texture under certain conditions. Reciprocating sliding tests are preformed to evaluate the effects of the texture on friction reduction. Textures with different densities are used in the experiments. The results suggest that the dimpled groove reduces the coefficient of friction by 6% with less density distribution on the sample surface; nevertheless, denser densities may reverse the result. The simulation results suggest that the texture may perform better under pressure of the lubricant film in hydrodynamic conditions.

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Optimization research on the lubrication characteristics for friction pairs surface of journal bearings with micro texture

Cited by 25 publications

References 10 publications

Influence of Groove Dimensions on the Tribological Behavior of Textured Cylindrical Roller Thrust Bearings under Starved Lubrication

Influence of Groove Dimensions on the Tribological Behavior of Textured Cylindrical Roller Thrust Bearings under Starved Lubrication

Performance analysis of rough surface hybrid thrust bearing with elliptical dimples

A Study of Micro-Dimpled Groove Texture in Friction Reduction

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