Experimental study on the distributed lubrication characteristics of full-size water-lubricated stern bearings under hull deformation

Ouyang, Wu; Liu, Qilin; Xiao, Jinhua; Huang, Jian; Zhang, Zhuo; Wang, Lei

doi:10.1016/j.oceaneng.2022.113226

Cited by 23 publications

(9 citation statements)

References 24 publications

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“…Under light load conditions, the elastic deformation of bearing surfaces is negligible [38]. However, under heavy load conditions, the pressure at the inlet of the highpressure oil chamber and the oil seal inlet increases, leading to a significant influence of the elastic deformation on the width of the gap.…”

Section: Calculation Of Elastic Deformation Of Bearing Surfacementioning

confidence: 99%

Carrying Capacity of Spherical Hydrostatic Bearings including Elastic Deformation

Zhang,

Yang,

et al. 2024

Lubricants

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This paper presents a theoretical model for calculating the carrying capacity of spherical hydrostatic bearings, including the deduction and solution of differential equations for fluid flow in the oil seal and the generation of bearing characteristic parameters. An example is used to verify the accuracy of the proposed calculation model. Additionally, the influence of dynamic pressure on the bearing capacity is investigated under various speed conditions. The results demonstrate that as the minimum width of the oil gap decreases, the maximum dynamic pressure increases non-linearly. Furthermore, the maximum dynamic pressure increases with higher rotational speeds, particularly when the width is smaller.

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Section: Calculation Of Elastic Deformation Of Bearing Surfacementioning

confidence: 99%

Carrying Capacity of Spherical Hydrostatic Bearings including Elastic Deformation

Zhang,

Yang,

et al. 2024

Lubricants

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“…e and q denote the eccentricity ratio and circumferential angle, respectively. In addition, due to the high speed of the journal, the bearing load is mainly undertaken by the oil film [30]. Thus, the elastic deformation caused by the hydrodynamic pressure, based on the influence coefficient method established by Woodward and Paul [31], can be expressed as…”

Section: Oil Film Thicknessmentioning

confidence: 99%

Co-optimization for hydrodynamic lubrication and leakage of V-shape textured bearings via linear weighting summation

Guo,

Ding,

Wang

et al. 2023

Phys. Scr.

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In this study, the linear weighting summation method is adopted for the co-optimization of V-shape textured bearings to maximize the load-carrying capacity and minimize the leakage and friction. Optimal parameters including texture angle and depth and ratio of the texture width are identified based on the established numerical model. Moreover, to improve the comprehensive performance, especially leakage reduction, two profile modifications are introduced: micro-slope and micro-step. The results show that the two proposed modifications are effective for improving the comprehensive performance of V-shape textured journal bearings, and optimal values exist for both the modifications. Furthermore, the overall performance of a bearing with micro-step modification is superior to that of a bearing with micro-slope modification, but the bearing with micro-slope modification is more sensitive to leakage. In summary, this study aims to provide theoretical foundation for the multi-objective optimization design of V-shape textured bearings.

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“…In addition to the research described above, many studies [16][17][18][19][20][21][22][23][24][25][26][27][28] on wear, dynamic characteristics, friction-induced vibration and noise of water-lubricated stern tube bearings have also been conducted by scholars. Han et al [16] experimentally studied the mechanism of action of stick-slip nonlinear friction-induced vibration of water-lubricated stern rube bearing.…”

Section: Introductionmentioning

confidence: 99%

“…Ning et al [22] proposed a wear monitoring method based on the amplitude spectrum of the ultrasonic reflection coefficient, and used this method to analyze the effects of bearing parameters, objective function and algorithm parameters on the identification results. A full-sized test rig of a water-lubricated stern bearing with an elevation adjustment device was built by Ouyang et al [23], in which the eddy current sensor and high-precision wireless telemetry were used to collect the axis orbit signal and circumferential film pressure, respectively. In addition, the effect of bias load, rotational speed, and hull deformation on bearing lubrication characteristics were experimentally studied.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Mixed-Lubrication Performance of Staved Stern Tube Bearings Lubricated with Water

et al. 2023

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The present study aims to establish a mixed lubrication model for staved stern tube bearings lubricated with water, in which the average Reynolds equation and a KE elastic–plastic contact model are introduced to calculate the hydrodynamic pressure and contact pressure, respectively. The difference in the mixed lubrication behaviors between circular- and flat-staved bearings is compared; moreover, the effects of the number of staves on the mixed-lubrication performance of these two kinds of staved bearing are investigated. The mechanism of action of the number of staves in staved bearings on the mixed-lubrication performance is revealed. The numerical results show that the number of staves has a significant effect on the mixed-lubrication performance in circular- and flat-staved bearings. Furthermore, there is an optimal value for the number of staves, shown to be 30 in the current simulation, for improving the mixed-lubrication performance of flat-staved stern tube bearings lubricated with water.

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Experimental study on the distributed lubrication characteristics of full-size water-lubricated stern bearings under hull deformation

Cited by 23 publications

References 24 publications

Carrying Capacity of Spherical Hydrostatic Bearings including Elastic Deformation

Carrying Capacity of Spherical Hydrostatic Bearings including Elastic Deformation

Co-optimization for hydrodynamic lubrication and leakage of V-shape textured bearings via linear weighting summation

Numerical Analysis of the Mixed-Lubrication Performance of Staved Stern Tube Bearings Lubricated with Water

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