An Investigation of Viscous Torque Loss in Ball Bearing Operating in Various Liquids

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dc.contributor.authorDobrovolný, Martincs
dc.contributor.authorHabán, Vladimírcs
dc.contributor.authorTancjurová, Janacs
dc.contributor.authorZbavitel, Jancs
dc.coverage.issue10cs
dc.coverage.volume13cs
dc.date.accessioned2021-09-22T14:57:29Z
dc.date.available2021-09-22T14:57:29Z
dc.date.issued2021-05-08cs
dc.description.abstractThe limited functionality of seals that are used in hydraulic machines to prevent the liquid from leaking into the bearings may result in decrease in machine efficiency and reliability and may cause an accident of the whole hydraulic machine. However, not every damage of seals must result in a shutdown of the whole machine. In case of partially or fully flooded bearings, the machine can temporarily operate with significantly increased input power and with lower efficiency. Such a limited operation of the machine shortens its lifetime and is accompanied by the presence of torque loss on the shaft. The measurement of torque loss can be helpful during the design process of new machines as well as for an analysis of hydraulic losses and efficiency of prototypes. Moreover, the real-time measurement of torque loss can be used for remote online monitoring of hydraulic machines. The aim of this paper is to present primarily an experimental investigation of the viscous torque loss for ball bearings submerged into liquid. The CFD simulation is also included to distribute the total torque loss between the hub and the bearing. The main goal is to modify the drag coefficient, respectively the friction loss coefficient in SKF's and Palgrem's empirical model. The new coefficients may provide a prediction of torque loss in the fully flooded bearings which is not possible with existing models. The torque loss characteristics are determined for specific ball bearings too. In contradiction to partially flooded bearing situation, it is obvious from a experiment, that some coefficients in Palgrem's model and SKF model are dependent on revolutions when bearings are fully flooded. The experimental investigation of viscous torque loss are carried out for various types of ball bearings, all fully submerged into two various liquids, i.e., oil and water.en
dc.formattextcs
dc.format.extent1-10cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationWater. 2021, vol. 13, issue 10, p. 1-10.en
dc.identifier.doi10.3390/w13101414cs
dc.identifier.issn2073-4441cs
dc.identifier.other172363cs
dc.identifier.urihttp://hdl.handle.net/11012/201644
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofWatercs
dc.relation.urihttps://doi.org/10.3390/w13101414cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2073-4441/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectviscous torque lossen
dc.subjectball bearingen
dc.subjectdrag coefficienten
dc.subjectfriction loss coefficienten
dc.subjectPalmgren's modelen
dc.subjectSKF modelen
dc.titleAn Investigation of Viscous Torque Loss in Ball Bearing Operating in Various Liquidsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-172363en
sync.item.dbtypeVAVen
sync.item.insts2021.09.22 16:57:29en
sync.item.modts2021.09.22 16:14:48en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor fluidního inženýrství Viktora Kaplanacs
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EÚ-odbor fluidního inženýrství Viktora Kaplana