Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Liu, Xichun; Chen, Wei

doi:10.3390/app12010485

Cited by 7 publications

(2 citation statements)

References 29 publications

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“…More recently, some researchers employ computational fluid dynamics (CFD) technique to perform a detailed study of three-dimentional flow, temperature and pressure field for HGJB. [17][18][19] In addition, some advanced lubrication models considering cavitation effect, 20 thermal effect, 21 inertia effect, 22 turbulence effect, 23 misalignment effect, 24,25 and texture effect 26 have also been established for various HGJB solutions.…”

Section: Introductionmentioning

confidence: 99%

Comparative study on static and dynamic characteristics of pumping-out and pumping-in herringbone grooved journal bearings

Lin

Qiao

et al. 2023

Advances in Mechanical Engineering

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The aim of this paper is to compare the static and dynamic performances of two types of herringbone grooved journal bearings (HGJBs), that is, pumping-out HGJB and pumping-in HGJB. Firstly, based on finite control volume method and the principle of flow balance, an equivalent Reynolds equation considering the turbulence effect is derived. Then, the journal motion considering angular displacement is analyzed with linear perturbation method. The equivalent Reynolds equation is linearized into static-form one and perturbed-form ones. These equations are solved by finite difference method and their solutions are integrated on the bearing surface to determinate the static characteristics and dynamic coefficients of HGJB. Additionally, the critical mass and critical whirl frequency are defined for evaluating the stability and rigidity of bearing by solving a motion equation with four degree of freedoms (DOFs). Finally, the static and dynamic characteristics of two types of HGJBS are analyzed and compared symmetrically in consideration of effects of eccentricity ratio, length to diameter ratio, groove angle, groove depth, the width of sealing damp, tilting degree of journal, and rotation speed. The results show that, within the interested range of investigated parameters, static performances of pumping-out HGJB are superior to that of pumping-in HGJB generally. Stability of pumping-in HGJB is better than pumping-out HGJB but bearing rigidity of pumping-in HGJB is inferior to pumping-out HGJB.

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Section: Introductionmentioning

confidence: 99%

Comparative study on static and dynamic characteristics of pumping-out and pumping-in herringbone grooved journal bearings

Lin

Qiao

et al. 2023

Advances in Mechanical Engineering

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“…Moreover, the dynamic and cavitation performance of liquid metal lubricated herringbone groove journal bearing is investigated numerically and its structure is optimized. 16 However, the above studies on bearing cavitation are only focused on normal lubricant media and rarely on cryogenic media lubricating bearings.…”

Section: Introductionmentioning

confidence: 99%

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Yan

Lai

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Spiral-grooved thrust bearing (SGTB) is one of the important kinds of supporting component in high-speed rotating devices. The high shearing rate of SGTB can produce a large amount of viscous dissipative heat, which causes a temperature rise. Dynamic pressure effect induces pressure variation in the herringbone SGTB (HSGTB). When liquid hydrogen (LH2) is used as a lubricant, cavitation caused by lower pressure and higher temperature can result in lubrication failure. Especially, the cavitation of LH2 is more prone to occur because of its small temperature difference between the triple point and critical point, and the smaller supercooling degree. The influence of thermal properties on the phase transition process of LH2 is more significant. In this paper, the thermal and mechanical performance of three different structures of LH2 lubricated SGTB is compared by considering viscous dissipative heat. Herringbone SGTB is proposed for better performance and feasibility of its application in LH2 lubrication. The static performances of HSGTB such as load capacity, friction torque, cavitation rate, average temperature, and heat flux have been evaluated numerically by introducing the cryogenic cavitation model. The orthogonal sampling method and range analysis are used to optimize the HSGTB structure. Compared with the original HSGTB, cavitation rate and temperature rise are significantly suppressed in the optimized HSGTB. In addition, the load capacity is also improved effectively at high rotational speed, which is expected to be applied to high-speed centrifugal pumps.

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Numerical Analysis of Oil Lubricated Journal Bearing with Herringbone Grooves

Javed,

Mishra,

Behera

2024

Lecture Notes in Mechanical Engineering

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Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Cited by 7 publications

References 29 publications

Comparative study on static and dynamic characteristics of pumping-out and pumping-in herringbone grooved journal bearings

Comparative study on static and dynamic characteristics of pumping-out and pumping-in herringbone grooved journal bearings

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Numerical Analysis of Oil Lubricated Journal Bearing with Herringbone Grooves

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