A multiobjective optimization of journal bearing with double parabolic profiles and groove textures under steady operating conditions

Liu, Chongpei; Zhong, Ning; Lu, Xin; Zhao, Bin

doi:10.1051/meca/2020017

Cited by 6 publications

(3 citation statements)

References 31 publications

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“…Kango et al [16] found that microgrooved journal bearing can reduce the friction coefficient and average temperature better than spherical textured journal bearing, and the performance gain is more obvious at lower eccentricity ratio. Researchers [17][18][19] used a multiobjective optimization method to optimize the texture parameters of the microgrooved journal bearing to obtain greater load-carrying capacity and smaller friction coefficient. Lately, Filgueira Filho et al [20] experimentally analyzed the performances of textured journal bearings with chevron, saw tooth, oblong dimple, and aligned dimple and found that the chevron textured journal bearing exhibited smaller eccentricity under reasonable texture geometrical parameters.…”

Section: Introductionmentioning

confidence: 99%

Effects of Texture Bottom Profile on Static and Dynamic Characteristics of Journal Bearings

Zeng

Xiao

et al. 2021

Shock and Vibration

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The purpose of this paper is to numerically study the effect of texture bottom profile on static, dynamic, and stability performance parameters of hydrodynamic journal bearings. The different performance parameters of square textured journal bearings with different bottom profiles are numerically investigated and compared with those of smooth journal bearing. There are five bottom profiles of this square texture: flat, curved, isosceles triangle (T1), oblique triangle (T2), and oblique triangle (T3). The static and dynamic coefficients are calculated by solving the steady-state Reynolds equation and the perturbation equations with FDM numerical technique. The performance characteristics under different texture distribution, depth, and bottom profiles are studied, and the current numerical results show that the selection of texture parameters is crucial to improve the static, dynamic, and stability performances of hydrodynamic journal bearing. Meanwhile, it is also found that the square texture with a flat bottom profile has a higher improvement in the values of static performance parameters in comparison to those other bottom profiles. Moreover, the simulation results indicate that the dynamic and stability performances improvement of textured journal bearing is also significant, especially when the eccentricity ratio is smaller.

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Section: Introductionmentioning

confidence: 99%

Effects of Texture Bottom Profile on Static and Dynamic Characteristics of Journal Bearings

Zeng

Xiao

et al. 2021

Shock and Vibration

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“…Some scholars have investigated the performance of dynamic journal bearings under the effect of microtexture. For example, Chongpei, Ning and Wanyou et al [15,16] proposed a new type of double parabolic profiles with groove textures and theoretically investigated the bushing deformation and lubricating oil temperature variation using a suitable model, and the results showed that the appropriate texture position and geometry could improve the load carrying capacity of dynamic journal bearings and reduce the wear of bushing edge. Guo and Yanfeng et al [17] studied the modeling of coupled microtexture journal-thrust bearings lubricated with water and found that not only the coupled hydrodynamic effect could improve the lubrication performance of the bearings, but also there existed an optimal bottom shape of the microgroove that could improve the lubrication performance of the bearings, in addition to an optimal value of the microgroove depth produced maximum load carrying capacity and minimum friction coefficient of the bearings.…”

Section: Introductionmentioning

confidence: 99%

Effect of cylindrical micro-pit texture on the performance of misaligned radial journal bearing

Li,

He,

Wang

et al. 2024

Preprint

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In order to study the influence of the circumferential distribution position, axial proportion, depth, inclined angle and area rate of cylindrical micro-pit texture on the lubrication and tribological performance of misaligned radial journal bearing, the mathematical model of friction lubrication of journal bearing is established based on the Reynolds equation, and the oil film pressure under the influence of different micro-pit texture parameters is solved iteratively by finite difference method, and the bearing load carrying capacity, friction force and end leakage of bearing under different texture parameters are calculated. The results are as follows: the bearing load carrying capacity is higher when the cylindrical micro-pit texture is distributed in the boost area and the axial ratio is around 55%; compared with smooth bearing, fully textured bearing and bucking zone micro-pit texture bearing, the coefficient of friction of journal bearing of the micro-pit texture in the boost area journal bearing is lower, and there exists an optimal axial proportion and depth of texture, which make the best friction and lubrication performance of the journal bearing; the micro-pit texture has the dual possibility of weakening and enhancing the bearing load carrying capacity, and the existence of the optimal circumferential and axial ratio, depth and inclined angle of the micro-pit texture make the bearing have higher load carrying capacity with less friction coefficient; the area ratio of cylindrical micro-pit texture is linearly correlated with bearing capacity and friction force; the smaller the degree of misalignment of the bearing, the more beneficial it is to improve the friction and lubrication performance of the bearing when machining suitable parameters of micro texture on the smooth bearing surface.

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“…Moreover, Harvey et al (2018) used the interior-point algorithm to numerically optimise the depth, circumferential and radial extent of bearing surface texture. Liu et al (2020) studied the optimal combination of the number, depth and diameter of double parabolic texture based on the Taguchi and grey correlation analysis method. Zhang et al (2017) optimised the contour of surface micro-dimples based on the average Reynolds equation and genetic algorithm.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface micro-groove texture on lubrication performance of tripod universal coupling

Yang

Xiao

Geng

2021

ILT

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Purpose This study aims to study the effect of micro-groove texture geometric parameters on the lubrication characteristics of the tripod universal coupling. Design/methodology/approach The Navier–Stokes equation was used to analyse the influence of micro-groove geometric parameters on the coupling’s lubrication performance. Further, Kriging approximate model and neighborhood cultivation genetic algorithm (NCGA) were used to optimise the micro-groove geometric parameters and improve the coupling’s lubrication performance. Findings The results show that as the micro-groove depth and width increase, respectively, the oil film-bearing capacity first increases and then decreases; on the contrary, the friction coefficient first decreases and then increases. With the increase of the micro-groove inclination angle, the bearing capacity of the oil film first increases and then remains unchanged. At the same time, the friction coefficient first decreases and then increases slightly. The lubricating performance of the optimised coupling is significantly improved: the optimised oil film-bearing capacity increases by 12.5%, the friction coefficient reduces by 14% and the maximum oil film pressure increases by 4.3%. Originality/value At present, the grease lubrication performance of the micro-groove textured tripod universal coupling has not been studied. The micro-groove parameters are optimised, and the coupling’s lubrication performance is improved greatly by the Kriging model and NCGA algorithm. It is of great significance to extend the coupling’s fatigue life.

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A multiobjective optimization of journal bearing with double parabolic profiles and groove textures under steady operating conditions

Cited by 6 publications

References 31 publications

Effects of Texture Bottom Profile on Static and Dynamic Characteristics of Journal Bearings

Effects of Texture Bottom Profile on Static and Dynamic Characteristics of Journal Bearings

Effect of cylindrical micro-pit texture on the performance of misaligned radial journal bearing

Effect of surface micro-groove texture on lubrication performance of tripod universal coupling

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