Analysis of equivalent supporting point location and carrying capacity of misaligned journal bearing

Lv, Fangrui; Ta, Na; Rao, Zhushi

doi:10.1016/j.triboint.2017.06.034

Cited by 26 publications

(17 citation statements)

References 19 publications

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“…The load-carrying capacity of the bearing is given by: where F x and F y are hydrodynamic forces in the horizontal and vertical directions, respectively, and A is the extended area of the bearing. The axial asymmetric pressure of the misaligned bearing generates a misalignment moment applied at the axial midplane of the journal (Lv et al, 2017). The moment generated by misalignment can be expressed as:…”

Section: Numerical Modelmentioning

confidence: 99%

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Analysis of misaligned water-lubricated polymer bearing with axial grooves

Jiao

Zou

et al. 2019

ILT

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Purpose The purpose of this paper is to analyze the lubrication behavior of misaligned water-lubricated polymer bearings with axial grooves. Design/methodology/approach A lubrication model considering journal misalignment, bush deformation and grooves is established. In dynamic analyses of shaft systems, bearings are usually simplified as supporting points. Thus, an approach for solving the equivalent supporting point location is presented. The influence of misalignment angle and groove number on film thickness, hydrodynamic pressure distribution, load-carrying capacity and ESP location is investigated. Findings As the misalignment angle increases, the location of the maximum pressure and ESP are shifted toward the down-warping end, and the load-carrying capacity of the bearing decreases. In comparison to the nine-groove bearing, the six grooves bearing has a higher load-carrying capacity and the ESP is located closer to the down-warping end for an equivalent misalignment angle. Practical implications The results of this study can be applied to marine propeller shaft systems and other systems with misaligned bearings. Originality/value A study on the lubrication behavior of misaligned water-lubricated polymer bearings with axial grooves is of significant interest to the research community.

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Section: Numerical Modelmentioning

confidence: 99%

“…The axial asymmetric pressure of the misaligned bearing generates a misalignment moment applied at the axial mid-plane of the journal (Lv et al , 2017). The moment generated by misalignment can be expressed as: …”

Section: Modeling Of Misaligned Grooved Journal Bearingsmentioning

confidence: 99%

Analysis of misaligned water-lubricated polymer bearing with axial grooves

Jiao

Zou

et al. 2019

ILT

Self Cite

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“…Zhang et al [18] proposed a method to determine the appropriate design parameters for water-lubricated bearing with journal misalignment. Lv and coworkers [19] investigated the performance of misaligned journal bearing and provided a more efficient method to analyze the load-carrying capacity and equivalent supporting point location. Mallya et al [20] analyzed the static performance of three-axial water-lubricated journal bearing with misalignment in turbulent regime.…”

Section: Introductionmentioning

confidence: 99%

Effects of bushing profiles on the elastohydrodynamic lubrication performance of the journal bearing under steady operating conditions

Liu¹,

Zhao²,

Li³

et al. 2019

Mechanics & Industry

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The bushing profiles have important effects on the performance of journal bearing. In this article, the effects of plain profile, double conical profile, and double parabolic profile on the elastohydrodynamic lubrication of the journal bearing under steady operating conditions are investigated. The journal misalignment and asperity contact between journal and bushing surface are considered, while the modification of the bushing profiles due to running-in is neglected. Finite element method is used for the elastic deformation of bushing surface, while the numerical solution is established by using finite difference method and overrelaxation iterative method. The numerical results reveal that the double parabolic profile with appropriate size can significantly increase the minimum film thickness and reduce the asperity contact pressure and friction, while the maximum film pressure, load-carrying capacity, and leakage flow rate change slightly under steady operating conditions. This study may help to reduce the edge wear and prolong the service life of the journal bearing.

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“…Secondly, let us review the papers about the misalignment effects on the water bearings, which are used as stern bearings in the ship rotor-bearing system. As the journal misalignment resulted in the change in the supporting point location, which was located at the middle section of bearing without misalignment, Lv et al 26 obtained the fitting equation about the equivalent supporting point location by large number of numerical simulations. Then, mixed-lubrication analysis of misaligned bearing was presented by considering turbulence 27 and wall slip.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the characteristics of aerostatic journal bearings considering misalignment under pure-static and hybrid condition

Zhang

Zou

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this paper, the steady-state characteristics, including film pressure, load capacity, stiffness, misalignment moment of aerostatic bearings considering two types of misalignment (along vertical direction [Formula: see text] and along horizontal direction [Formula: see text]) are studied under pure-static and hybrid condition. The journal misalignment effects on the steady-state characteristics under pure-static condition and hybrid condition are studied comparatively. The results show that the load capacity and stiffness increase with the increase in the degree of journal misalignment under hybrid condition, while they decrease with the increase in the degree of journal misalignment under pure-static condition. Moreover, the journal misalignment along two perpendicular direction effects on the performances of aerostatic bearings are also investigated comparatively and the performances of bearing are found to be more sensitive to the misalignment along horizontal direction.

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Analysis of equivalent supporting point location and carrying capacity of misaligned journal bearing

Cited by 26 publications

References 19 publications

Analysis of misaligned water-lubricated polymer bearing with axial grooves

Analysis of misaligned water-lubricated polymer bearing with axial grooves

Effects of bushing profiles on the elastohydrodynamic lubrication performance of the journal bearing under steady operating conditions

Comparison of the characteristics of aerostatic journal bearings considering misalignment under pure-static and hybrid condition

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