Experimental and theoretical investigations on transition of lubrication conditions for a five-pad tilting-pad journal bearing with eccentric pivot up to highest surface speeds

Hagemann, Thomas; Zemella, Philipp; Pfau, Bastian; Schwarze, Hubert

doi:10.1016/j.triboint.2019.106008

Cited by 20 publications

(10 citation statements)

References 16 publications

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“…Besides of the evaluations of wear resistance of materials by using laboratory standard tribometers, system level or assembly level bench tests, such as full-size journal bearings, ball bearings, gears, are not replaceable in industry. The self-lubricating spherical plain bearings (type GE17ES) [371], full-size five-pad tilting-pad journal bearing [372], wet clutches [373] have been tested with bench testers. Full-scale testing of low adhesion effects with small amounts of water in the wheel/rail interface has been carried out on a tram wheel test rig [374].…”

Section: Physical Modelling and Testingmentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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Section: Physical Modelling and Testingmentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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“…The authors comprehensively validated the theoretical THD bearing model and its implementation with test data in previous investigations for fixed-pad and tilting-pad journal bearings, e.g., [10,12,23]. As no test data for planet bearings is available, this step must be omitted here.…”

Section: • (4)mentioning

confidence: 99%

Operating Behavior of Sliding Planet Gear Bearings for Wind Turbine Gearbox Applications—Part I: Basic Relations

et al. 2021

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The application of sliding planet gear bearings in wind turbine gearboxes has become more common in recent years. Assuming practically applied helix angles, the gear mesh of the planet stage causes high force and moment loads for these bearings involving high local loads at the bearing edges. Specific operating behavior and suitable design measures to cope with these challenging conditions are studied in detail based on a thermo-hydrodynamic (THD) bearing model. Radial clearance and axial crowning are identified as important design parameters to reduce maximum pressures occurring at the bearing edges. Furthermore, results indicate that a distinct analysis of the gear mesh load distribution is required to characterize bearing operating behavior at part-load. Here, operating conditions as critical as the ones reached at nominal load might occur. Wear phenomena can improve the shape of the gap in the circumferential as well as in axial direction incorporating a significant reduction of local maximum pressures. The complexity of the combination of these aspects and the additionally expected impact of structure deformation gives an insight into the challenges in the design processes of sliding planet gear bearings for wind turbine gearbox applications.

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“…As a result, unstable forces are significantly reduced and bearings are no longer a potential source of rotor system instability. It has been successfully used in rotating machinery such as centrifugal compressors, pumps, 6 or gas turbines 7 and has great potential for application in S-CO 2 cases.…”

Section: Introductionmentioning

confidence: 99%

Operating characteristics of supercritical carbon dioxide high speed tilting pad bearings considering inertia effect

Wang

Chen

et al. 2023

Advances in Mechanical Engineering

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Some degree of inertia effect on the bearing film is inevitable for high density supercritical carbon dioxide (S-CO2) working as a lubricant in high speed rotor operating conditions. This paper aims to reveal the influence of inertia effect on static and dynamic performances of the S-CO2 tilting pad bearings. Numerical results demonstrate that inertia effect on the lubricating film of the top pad is more pronounced. The peak pressure of all pads is increased at a high reduced Reynolds number compared with the inertialess condition, while the influence of inertia effect on the dynamic coefficient is weak. The theoretical model including inertia effect presented in this study can more accurately evaluate the performance of high speed S-CO2 tilting pad bearings.

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Experimental and theoretical investigations on transition of lubrication conditions for a five-pad tilting-pad journal bearing with eccentric pivot up to highest surface speeds

Cited by 20 publications

References 16 publications

A review of advances in tribology in 2020–2021

A review of advances in tribology in 2020–2021

Operating Behavior of Sliding Planet Gear Bearings for Wind Turbine Gearbox Applications—Part I: Basic Relations

Operating characteristics of supercritical carbon dioxide high speed tilting pad bearings considering inertia effect

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