Dynamic Performances of the Herringbone-Grooved Gas Bearing

Li, S S; Chen, H H; Ding, Huiming; Zhang, G Y; Ma, Dong

doi:10.1088/1757-899x/408/1/012015

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The comparison diagram is shown in Figure 9. At the same time, we used the parameters of the herringbone groove journal bearing in the reference to calculate the friction torque of the bearing and compared it with the experimental and theoretical results in the reference [40] to verify the correctness of the calculation model in this paper. The comparison diagram is shown in Figure 9.…”

Section: Verification Of Hgjbs Programmentioning

confidence: 99%

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: Verification Of Hgjbs Programmentioning

confidence: 99%

Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Liu

Chen

2022

Applied Sciences

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“…Li et al found that friction torque, stiffness and punching performance were deeply affected by the parameters of herringbone grooved gas bearings. The bearing load capacity can be improved by increasing the groove angle, decreasing the width-to-ridge ratio, or increasing the groove circumferential ratio [16]. Li et al explored the influence of geometric parameters on the performance parameters of aerodynamic bearings based on the CFD model.…”

Section: Introductionmentioning

confidence: 99%

Performance Prediction of High-Speed Hydrogen Gas-Lubricated Herringbone Grooved Journal Bearing

Qiang¹,

Zhao²,

Yan³

et al. 2022

Applied Sciences

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The liquefaction of hydrogen is considered to be a crucial process in the large-scale utilization of hydrogen energy. In hydrogen liquefaction, hydrogen turbo-expander is a key refrigerating machine for high liquefaction efficiency. Performance of the turbo-expander is directly affected by the hydrogen gas bearings. To obtain a deep understanding of the performance characteristics of hydrogen gas bearings, the static and dynamic characteristics of herringbone grooved journal bearings under hydrogen and other lubricating gases were numerically calculated and compared. The bearing load capacity and critical mass of hydrogen gas bearings were slightly lower than those of helium-, air- and nitrogen-lubricated bearings. To improve the performance of the hydrogen gas bearings used in high-speed turbo-machinery, the influence of working conditions was analyzed. It is found that the load capacity of hydrogen gas bearings can be improved by increasing the ambient pressure, reducing the gas film clearance, and raising the bearing eccentricity ratio. Meanwhile, the critical mass increases, and the bearing dynamic stability is enhanced.

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Dynamic Performances of the Herringbone-Grooved Gas Bearing

Cited by 2 publications

References 9 publications

Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Structural Design and Optimization of Herringbone Grooved Journal Bearings Considering Turbulent

Performance Prediction of High-Speed Hydrogen Gas-Lubricated Herringbone Grooved Journal Bearing

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