Comparative study of spherical dimple and bump effects on the tribological performances of journal bearing

Gui, Chao; Meng, Fanzhi

doi:10.1177/1350650118770355

Cited by 15 publications

(8 citation statements)

References 41 publications

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“…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. Besides, some researchers [21][22][23] also analyzed the influence of protruded and dimple textures on the loadcarrying capacity and friction of journal bearings and compared the results with that of smooth journal bearing.…”

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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“…The microgroove depth is an important factor that affects the lubrication performance of the journal bearing and the thrust bearing. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] As shown in Figure 11(a) and (b), the load capacity reaches a maximum and the friction coefficient reaches a minimum at the groove depth of 2.0 lm and 2.5 lm for the eccentricity ratio of 0.2 and 0.4, respectively. Figure 11(a) and (b) also reveals that the load capacity continuously decreases with the increase in microgroove depth when the coupled effect is absent.…”

Section: Effect Of the Microgroove Depthmentioning

confidence: 99%

“…[11][12][13][14][15][16][17][18][19][20][21][22][23][24] In addition, the bottom shape of the microgroove plays a crucial role in affecting the hydrodynamic performance. [25][26][27] Recently, studies have been performed to further understand the influence mechanism of the microgroove with different bottom shapes. Ren et al 11 analyzed the effects of the bottom shapes and the motion direction on the lubrication performance.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, the influence of the texture shapes on the friction coefficient was further evaluated. 15 However, the studies mentioned above [11][12][13][14][15][25][26][27] only focused on the hydrodynamic performances for the single textured/microgroove journal bearing and the thrust bearing (conformal contact case). When the coupled hydrodynamic pressure is considered, the effects of the textured/microgroove surface on the lubrication performances of journal/thrust bearing may become unclear, which still requires further investigations.…”

Section: Introductionmentioning

confidence: 99%

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A hydrodynamic lubrication model and comparative analysis for coupled microgroove journal-thrust bearings lubricated with water

Xiang

Han

Chen

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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The novelty of this study is to develop a hydrodynamic lubrication numerical model for coupled microgroove journal-thrust bearings (or coupled bearings) under water-lubricated condition. In the present model, the continuity of the hydrodynamic pressure and the fluid field (or coupled hydrodynamic effect) at common boundary is considered to reveal the mutual effect between the hydrodynamic behavior of the journal bearing and the thrust bearing. The lubrication performances of the coupled microgroove bearing with three bottom shapes, i.e., isosceles triangle, right triangle, and left triangle, are studied comparatively. Additionally, the effects of the microgroove depth on the lubrication performances of the coupled bearing are discussed. The present study reveals that the coupled hydrodynamic effect generated by the coupled bearing can improve the lubrication performance for both the journal and the thrust bearing. The microgroove with left triangle bottom shape yields the optimal lubrication performance as compared to the other two. There is an optimal groove depth that generates the maximum load capacity and the minimum friction coefficient for both the journal and the thrust bearing.

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“…27 investigated on improvement in performance of journal bearing considering the influence of location of texture/slip surface at the pressure rise region. Gui and Meng 28 evaluated performance of journal bearing with dimple and bump features. The load capacity is enhanced and friction force is reduced with dimples located at pressure rising region in journal bearing.…”

Section: Introductionmentioning

confidence: 99%

Static and stability analysis of partial slip texture multi-lobe journal bearings

Rao

Rani

Mohamed

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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This paper presents one-dimensional analysis of modified dynamic Reynolds equation derived for partial slip texture multi-lobe journal bearings. The novelty included in this study is the configuration of partial slip texture region on the bottom bearing lobe surface of a multi-lobe journal bearing under a constant vertical load. The nondimensional pressure and shear stress for steady-state and nondimensional pressure gradients for dynamic coefficients for each lobe with partial slip texture configuration are derived based on narrow groove theory. Linearized stability analysis is evaluated using infinitesimal perturbation method. Results of static and stability characteristics of partial slip texture multi-lobe (two-axial groove, elliptical, three-lobe and offset) journal bearings are presented. Partial slip texture configuration significantly enhances load capacity, coefficient of friction, and stability of two-lobe journal bearing.

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Comparative study of spherical dimple and bump effects on the tribological performances of journal bearing

Cited by 15 publications

References 41 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

A hydrodynamic lubrication model and comparative analysis for coupled microgroove journal-thrust bearings lubricated with water

Static and stability analysis of partial slip texture multi-lobe journal bearings

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