Investigations on lubrication characteristics of high-speed electric multiple unit gearbox by oil volume adjusting device

Shao, Shuai; Zhang, Kailin; Yao, Yuan; Liu, Yi; Gu, Jun

doi:10.1631/2023.a2200274

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Numerical investigations mainly concern the oil distributions inside the gearboxes and no-load gear power losses. For now, at least, meshless method CFD methods (moving particle simulation, 4,27,28 smoothed particle hydrodynamics, [29][30][31] and lattice Boltzmann method [32][33][34] ) gain relevance in qualitatively describing the fluid's behaviors without tedious grid generation. Besides this point, the no-load drag torque can be further precisely predicted within the mesh-based finite volume method (FVM).…”

Section: Introductionmentioning

confidence: 99%

Splash lubrication for an orthogonal face gear using numerical investigation integrating image processing

Dai,

Yang,

Zhang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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With practical physical immersion depth as their joint, the relations between the oil distribution characteristics and the associated no-load power losses for splash-lubricated orthogonal face gears are explored and quantified in this paper. Firstly, a theoretical analytical model is proposed to estimate the churning losses of an isolated face gear considering all the preceding parameters, along with a numerical model of a face gear stirring oil developed based on the sliding mesh strategy. Then the accuracy and correctness of the computational fluid dynamics method are verified with experiments in terms of oil flow behavior and no-load losses. Finally, the physical immersion depth is determined by leveraging the image processing technique and substituted into the theoretical model replacing the static depth with an improvement of prediction accuracy. Last but not least, this practical immersion depth acts as a link to facilitate the communication between the oil distributions and the no-load power losses within the gearboxes.

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Section: Introductionmentioning

confidence: 99%

Splash lubrication for an orthogonal face gear using numerical investigation integrating image processing

Dai,

Yang,

Zhang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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Study on the sealing mechanism of ribbed oil-slinging ring composite seal at the axle end of high-speed train gearboxes

Lin,

Li,

Liu

et al. 2025

ILT

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Purpose This study aims to investigate the sealing performance of a novel ribbed oil-slinging ring composite seal (ROSRCS) for the axle end of train gearboxes. The ROSRCS design incorporates added ribs and an inclined outer edge to enhance the sealing mechanism and reduce oil leakage. Design/methodology/approach Computational fluid dynamics simulations were used to analyze the leakage characteristics of ROSRCS under varying angles, outer edge inclinations and rib numbers and heights. The sealing performance was compared to a traditional oil-slinging ring composite seal (OSRCS). Key parameters such as oil leakage rate, turbulence dissipation intensity and jet strength were evaluated. Findings Results indicate that ROSRCS reduces the oil leakage rate by 5.7% compared to OSRCS. At a slinger ring inclination of 35°, the turbulence dissipation center in the ROSRCS flow field shifts toward the inlet, increasing the maximum turbulence dissipation intensity by 22.56%. A proper outer edge inclination enhances jet intensity, strengthening turbulence dissipation by up to 9.21%. While adding ribs may generate negative pressure zones, strategic rib configurations improve axle-end sealing performance by modifying the number, position and intensity of vortices. Originality/value This research presents a refined composite seal design that enhances the sealing efficiency of train gearbox axle ends, demonstrating improved oil retention through innovative geometric modifications. The findings contribute to the development of more efficient sealing technologies in high-speed train applications. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2024-0370/

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抗蛇行减振器布置方式对机车横向动力学性能影响: Pareto优化和参数分析

Yao

Shen³

et al. 2023

J. Zhejiang Univ. Sci. A

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Investigations on lubrication characteristics of high-speed electric multiple unit gearbox by oil volume adjusting device

Cited by 3 publications

References 23 publications

Splash lubrication for an orthogonal face gear using numerical investigation integrating image processing

Splash lubrication for an orthogonal face gear using numerical investigation integrating image processing

Study on the sealing mechanism of ribbed oil-slinging ring composite seal at the axle end of high-speed train gearboxes

抗蛇行减振器布置方式对机车横向动力学性能影响: Pareto优化和参数分析

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