A numerical model for design and optimization of surface textures for tilting pad thrust bearings

Gropper, Daniel; Harvey, Terry J.; Wang, Ling

doi:10.1016/j.triboint.2017.10.024

Cited by 46 publications

(31 citation statements)

References 11 publications

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“…However, most of the papers focus on journal bearings, thrust bearings or sliding tribo-pair (Gropper et al, 2018a;Gropper et al, 2018b). The use of STs in REBs is still scarce compared to other machine elements and the concern is mainly related to rolling contact fatigue life (Grützmacher et al, 2021).…”

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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“…The best wear behavior was shown by the purely micro-coined sample, whereas pronounced wear occurred in the other two cases. Gropper et al 9 studied textured tilting pad thrust bearing and optimized the texture depth, circumferential and radial extent of the textured region. They also concluded that the optimum texture depth is significantly dependent on texture density as well as the operating conditions.…”

Section: Introductionmentioning

confidence: 99%

“…They also concluded that the optimum texture depth is significantly dependent on texture density as well as the operating conditions. Gropper et al 10 studied textured tilting pad thrust bearings under hydrodynamic conditions, using a mass-conserving cavitation algorithm. They compared three different discretization methods and significantly reduced the computational time for textured journal bearing.…”

Section: Introductionmentioning

confidence: 99%

Dynamic and stability performance improvement of the hydrodynamic bearing by using triangular-shaped textures

Sharma

Jamwal

Awasthi

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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In the present study, the effect of triangular shape textured on the bearing dynamic and stability performance has been investigated. The triangular-shaped texture having variation in their depth size, number of textures, and location has been used in the study to find the stiffness, damping, and stability parameters and compared with un-textured bearing. The pressure and fluid-film thickness in the lubricant flow domain having characteristics of Newtonian and isothermal and which is governed with Reynold's equation have been computed by discretizing the domain into four-nodded quadrilateral isoparametric by using finite element method. Four different cases of texture distribution on the bearing surface have been studied. The study has been carried out considering the bearing operation only under average eccentricity ratios of 0.6. From obtained results, it is found that the value of direct stiffness coefficient and threshold speed is found maximum at lower texture depth and the direct damping coefficient is found maximum at higher value of texture depth corresponding to different texture distribution on the bearing surface. The optimum triangular-shaped textured parameters have been also finalized to get maximum dynamic performance and stability, which may be expected to be valuable for bearing designers. For the purpose of a better insight into the stability aspect of the optimal textured journal bearing, the journal center trajectories are also drawn and compared with un-textured bearing.

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“…Then, the groove parameters played a significant role on the numerical analysis of mechanical seal. Gropper et al [28] involved a numerical analysis approach for optimization design of thrust bearing. The numerical results illustrated that the surface texture parameters would change the flow state of lubricated medium and the groove parameter analysis was the necessary step for the design of thrust bearing.…”

Section: Introductionmentioning

confidence: 99%

Study of Groove Parameters on the Hydrodynamic Behavior of Spiral-Grooved Thrust Bearing with Gas Lubricant

Xia

Chen

Wang

et al. 2021

International Journal of Rotating Machinery

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The gas-lubricated thrust bearing is widely used in agriculture mechanical systems, and the groove shape plays an important role on the hydrodynamic behavior of spiral-grooved thrust bearing (SGTB). Although the groove shape may change smaller, it is clear that the hydrodynamic response is very sensitive to the groove parameters. This paper proposes a computational method for the analysis of SGTB with gas lubricant, considering the effects of groove parameters. With the compressibility taken into account, the evaluation of lubrication performance for SGTB is obtained by the CFD technology. Also, the simulation results are compared with the published data, which indicates that the presented model of SGTB is able to obtain more realistic results of hydrodynamic characteristics of SGTB. Moreover, the mapping relationship between groove parameter and hydrodynamic behavior of SGTB is represented.

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A numerical model for design and optimization of surface textures for tilting pad thrust bearings

Cited by 46 publications

References 11 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

Dynamic and stability performance improvement of the hydrodynamic bearing by using triangular-shaped textures

Study of Groove Parameters on the Hydrodynamic Behavior of Spiral-Grooved Thrust Bearing with Gas Lubricant

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