Effects of double parabolic profiles with groove textures on the hydrodynamic lubrication performance of journal bearing under steady operating conditions

Liu, Chongpei; Li, Wanyou; Lu, Xin; Zhao, Bin

doi:10.1051/meca/2020018

Cited by 9 publications

(9 citation statements)

References 38 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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“…According to the Winkler surface model, the deformable object can be modeled as a set of spring elements. The elastic deformation Δh(x, y) is expressed as 16 :…”

Section: Analysis Of Geometric Modelmentioning

confidence: 99%

“…where T b is the thickness of the bearing bushing (as shown in Figure 2). When the only bearing bushing is regarded as an elastic body, E w can be represented as 16 :…”

Section: Analysis Of Geometric Modelmentioning

confidence: 99%

Numerical simulation of the dynamic fluid–solid coupling in journal bearing with the effect of surface topography in consideration

Zhang,

Wei,

2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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In the case of the journal-bearing system under a mixed or boundary lubrication regime, the deformation of the bearing, the flow of the lubricating medium, and the contact of the asperities should be taken into account. The lubrication problem at the journal-shaft interface is a complicated fluid–solid coupling problem. In this study, a new approach is proposed to analyze the dynamic fluid–solid coupling problem of journal bearings. The dynamic fluid–solid coupling problem is solved by the presented non-linear hybrid conjugate gradient method, which is based on the principle of pressure balance in the lubrication zone. One transient mixed lubrication model was developed to analyze the journal-bearing performance by considering the effects of skewness and kurtosis and the mass-conserving cavitation. According to the simulated results from the journal-bearing systems under the start-up condition, it can be found that the bearing performance is sensitive to the value of skewness or kurtosis and the degree of misalignment. Within a certain range, these cases with more negative skewness or lower kurtosis are conducive to decreasing friction loss and lift-off time. The developed model can be effectively used to track the performance of journal bearings.

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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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Effects of double parabolic profiles with groove textures on the hydrodynamic lubrication performance of journal bearing under steady operating conditions

Cited by 9 publications

References 38 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

Numerical simulation of the dynamic fluid–solid coupling in journal bearing with the effect of surface topography in consideration

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

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