Effect of herringbone groove structure parameters on the static performance of gas foil herringbone groove thrust bearings

Luan, Wenlin; Liu, Yan; Wang, Yongliang; Xu, Fangcheng

doi:10.1016/j.triboint.2022.107979

Cited by 8 publications

(2 citation statements)

References 32 publications

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“…It can be seen that the local pressure will decrease and then increase when the gas flows through the textured area because textures are some additional divergence-convergence wedge structures. The intensity of this secondary pressure-boosting effect [41] depends on the texture parameters introduced in section 2.3. Under the current texture arrangement, the film thickness in the textured area will increase when the eccentricity increases, like in case 2 and case 3 in table 5.…”

Section: Static Balance Locus Of Tfjbmentioning

confidence: 99%

Analysis of misalignment characteristics for textured foil journal bearing based on multigrid method

Xu,

Zhang,

Han

et al. 2023

Surf. Topogr.: Metrol. Prop.

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Surface texturing is an excellent solution to the load capacity deficiency of foil journal bearings. However, it will also introduce significant discretization efforts. This paper explored the possibility of searching the static balance locus of textured foil journal bearing using the multigrid method to ensure design efficiency. The modified Reynolds equation characterized the ultra-thin gas film behavior inside bump-type foil bearing, and two foil models were adopted simultaneously to obtain the foil’s structural deflection. The predicted load capacity agreed well with the experimental data. The results indicate that multigrid can accelerate the solution process of the compressible pressure governing equation, and the speed can be increased up to 70% when the nonlinear discretization scheme is adopted. It is recommended that textures are located in the pressure-rising region along the shaft’s rotating direction and that the axial direction is fully textured to improve load capacity. Moreover, the above texture distribution scheme can increase the tolerable maximum misalignment angle by 11.8% and enhance the stability of rotors operated in light-load and high-speed cases.

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Section: Static Balance Locus Of Tfjbmentioning

confidence: 99%

Analysis of misalignment characteristics for textured foil journal bearing based on multigrid method

Xu,

Zhang,

Han

et al. 2023

Surf. Topogr.: Metrol. Prop.

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“…The temperature and pressure distribution, water vapor volume fraction, shaft misalignment effect, and sealing performance were evaluated. Luan et al [31] improved the performance of gas thrust foil bearings by engraving herringbone grooves on the top foil of the bearing. The taper inlet height of foil bearing and pumping effect of grooves results in the boosting of pressure distribution and load carrying capacity of the bearing.…”

Section: Introductionmentioning

confidence: 99%

Design of herringbone grooved thrust bearing for locomotive turbocharger rotor

Mishra,

Behera

2024

Eng. Res. Express

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The herringbone texture exhibited excellent tribological performance to minimize friction and wear. However, the application of this texture in the development of grooved thrust bearings is limited. Therefore, in this study, an attempt was made to design an oil-lubricated herringbone grooved thrust bearing for high-speed locomotive turbochargers. The designed bearing accommodates the axial load generated due to the pressure difference between the turbine and compressor wheel. The bearing design starts with applying Newton's second law to predict the thrust load acting on the locomotive turbocharger rotor. The thrust load is calculated analytically and is found to be 4.54 kN for a design rotor speed of 1,00,000 rpm. Further, the herringbone grooved thrust bearing has been modeled numerically using non-linear Reynold's equation. The modified Reynolds equation is discretized using the finite volume method (FVM) and solved by successive over-relaxation (SOR) methodology to determine the static characteristics over the bearing surface. The developed HGTB is found to have a suitable load-carrying capacity of 4.6 kN, frictional torque of 0.25 N.m, and power loss of 2.98 kW. Further, a parametric analysis has been carried out to study the influence of design parameters such as the number of grooves, helix angle, angular groove width, groove depth, and speed on load-carrying capacity, frictional torque, and power loss.

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