Dynamic performance and wear of ceramic aerodynamic tilting-pad journal bearings: Tested and simulated under excessive vibrations

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dc.contributor.authorPokorný, Jancs
dc.contributor.authorNávrat, Tomášcs
dc.contributor.authorVajdák, Michalcs
dc.contributor.authorCabaj, Gabrielcs
dc.contributor.authorSliwková, Petracs
dc.coverage.issue6cs
dc.coverage.volume571cs
dc.date.accessioned2025-06-09T08:56:45Z
dc.date.available2025-06-09T08:56:45Z
dc.date.issued2025-02-06cs
dc.description.abstractCeramic aerodynamic tilting-pad journal bearings are emerging as a crucial component in hydrogen-electric mobility, specifically within electric compressors that deliver compressed air to hydrogen fuel cells. These bearings provide an environmentally friendly solution by eliminating the need for oil lubrication, thus preventing contamination of the fuel cells. This study focuses on the wear performance of these bearings under extreme conditions, operated near critical bending speed with elevated vibrations surpassing assembly clearance levels. To assess performance, a custom high-speed test rig was developed, designed without coupling to ensure precise measurements and to prevent the transfer of vibrations from the electric drive to the bearing system. Detailed vibration measurements were conducted under extreme conditions across various rotational speeds, reaching up to 70000 rpm. Alongside this, a dynamic computational model of the aerodynamic bearing was created, incorporating an analysis of rotor vibrations. Experimental results were systematically compared with simulation data to validate the model’s accuracy. Key to this study is the wear assessment of the bearing pads under these demanding conditions. The findings reveal that the proposed bearings exhibit reliable performance even in highly demanding scenarios, demonstrating their robustness and potential applicability in other critical and high-stress environments.en
dc.formattextcs
dc.format.extent1-16cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationWEAR. 2025, vol. 571, issue 6, p. 1-16.en
dc.identifier.doi10.1016/j.wear.2025.205876cs
dc.identifier.issn1873-2577cs
dc.identifier.orcid0000-0002-6613-4672cs
dc.identifier.orcid0000-0003-2772-3551cs
dc.identifier.orcid0009-0004-9791-4112cs
dc.identifier.orcid0000-0003-4121-2168cs
dc.identifier.other197187cs
dc.identifier.researcheridAAA-6114-2021cs
dc.identifier.researcheridQ-4147-2017cs
dc.identifier.researcheridE-3195-2018cs
dc.identifier.scopus57219197277cs
dc.identifier.scopus15042816200cs
dc.identifier.scopus56560290800cs
dc.identifier.urihttps://hdl.handle.net/11012/251324
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofWEARcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0043164825001450cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1873-2577/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectAerodynamic journal bearingen
dc.subjectHydrogen electromobilityen
dc.subjectMeasurementen
dc.subjectExtreme conditionsen
dc.titleDynamic performance and wear of ceramic aerodynamic tilting-pad journal bearings: Tested and simulated under excessive vibrationsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.grantNumberinfo:eu-repo/grantAgreement/TA0/TK/TK04030262cs
sync.item.dbidVAV-197187en
sync.item.dbtypeVAVen
sync.item.insts2025.06.09 10:56:45en
sync.item.modts2025.06.09 10:33:02en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav mechaniky těles, mechatroniky a biomechanikycs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav strojírenské technologiecs
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