Analysis of misaligned journal bearing with herringbone grooves: consideration of anisotropic slips

Jao, Hsiang Chin; Li, Wang Long; Liu, Tien Lun

doi:10.1007/s00542-017-3283-2

Cited by 9 publications

(6 citation statements)

References 36 publications

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“…Substitute the coordinate transformation Expression (11) and the pressure deviation Expression (12) into the above formula, and the five-point difference formula of the oil film continuum area under the oblique coordinates can be obtained as follows:…”

Section: Static Reynolds Equation IImentioning

confidence: 99%

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Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Liu

Chen

2022

Applied Sciences

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In order to improve the performance of the traditional constant-width herringbone grooved journal bearing in a computed tomography tube under a high-temperature environment, the present study designed a convergent herringbone grooved journal bearing (HGJB) structure lubricated by liquid metal. The bearing oil film thickness and the Reynolds equation considering the influence of turbulence are established and solved by using the finite difference method in the oblique coordinate system. The performance of the two bearings was compared, and the static and dynamic performance change trends of the two bearing structures under different eccentricities were systematically studied. The results show that the convergent herringbone grooved journal bearings are superior to the constant-width herringbone grooved journal bearings in terms of bearing capacity and stiffness coefficient. At the same time, the influence of structural parameters, such as the number of grooves, helix angle, groove to ridge ratio, groove depth on the performance of the constant-width herringbone grooved journal bearings, and the convergent herringbone grooved journal bearings was studied. Finally, we conclude that the performance of the convergent herringbone grooved journal bearings is optimal when the number of grooves is 15–20, the helix angle is 30–45°, the ratio of the groove to ridge is 1, and the groove depth is 0.02 mm −0.024 mm. This research has provided the thinking and reference basis for the design of liquid metal bearings for high-performance CT equipment.

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Section: Static Reynolds Equation IImentioning

confidence: 99%

“…The research on herringbone grooved journal bearings mainly focuses on the optimization of the performance of the herringbone grooves and their structural parameters [10][11][12]. Eliott et al used herringbone grooves to improve bearing performance [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Liu

Chen

2022

Applied Sciences

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“…Then to enhance the performance of journal bearing, Lee et al (2017) presented a new herringbone groove profile with the arrangements of the slant groove. Furthermore, the effects of anisotropic slip on the lubrication performance of misaligned herringbone grooved journal bearings were investigated by Jao et al (2017). However, those works all focused on the lubrication and dynamic performances of MHGJB, not much efforts have been committed to the side leakage.…”

Section: Introductionmentioning

confidence: 99%

Leakage-free optimization of micro herringbone grooved journal bearings with a virtual node method

Luo

Zheng²,

Tang

et al. 2021

ILT

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Purpose This study aims to develop a new method to treat the numerical singularity at the critical nodes of two skew coordinates, and optimize the leakage of micro herringbone grooved journal bearings (MHGJBs) with this method. Design/methodology/approach A side leakage numerical algorithm is proposed by using the skew meshes with a virtual node (SMVN) method to evaluate the effects of groove angle, bank/groove ratio, groove depth and groove number on load capacity, friction and side leakage of MHGJB. Findings The SMVN method is effective in treating the numerical singularity at the critical nodes of two skew coordinates. Besides, a group of optimized parameters of micro herringbone groove is obtained which can not only minimize the side leakage but also improve the load capacity and friction force. Originality/value A virtual node method was proposed, which can significantly improve the calculation accuracy in the side leakage model.

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“…The results showed that the lubrication performance can be remarkably enhanced with the left triangle and rectangle bottom shapes. Jao et al [24] studied the influence of anisotropic slip on the characteristics of misaligned journal bearings with herringbone grooves, which indicated that the influence of journal misalignment can be diluted by the existence of slip boundary conditions.…”

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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Analysis of misaligned journal bearing with herringbone grooves: consideration of anisotropic slips

Cited by 9 publications

References 36 publications

Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Leakage-free optimization of micro herringbone grooved journal bearings with a virtual node method

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

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