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Experimental verification of a combi-bearing model for vertical rotor systems
Luleå tekniska universitet, Material- och solidmekanik.
Luleå tekniska universitet, Material- och solidmekanik.
Vattenfall Research & Development.
2013 (English)In: Journal of Vibration and Acoustics-Transactions of the ASME, ISSN 1048-9002, E-ISSN 1528-8927, Vol. 135, no 3Article in journal (Refereed) Published
Abstract [en]

Combi-bearing is a combined thrust-journal bearing design used in vertical hydropower rotors. The dynamic characteristics of this component (combi-bearing) were analytically modeled by Luneno et al. (2011, "Model Based Analysis of Coupled Vibrations Due to the Combi-Bearing in Vertical Hydroturbogenerator Rotors," ASME J. Vib. Acoust., 133, p. 061012). This analytic model was inserted into a finite element model of a vertical rotor rig and numerically simulated. In this paper, the simulated vertical rotorbearings system is a small-scale vertical machine constructed to validate the analytically derived combi-bearing model. Good agreement was found between the simulation and experimental results. The simulation and experimental results showed that the journal (radial) bearing's position relative to the contact point between the combi-bearing's collar and the rotor influences the rotor system's fundamental natural frequencies. Therefore, the combi-bearing model needs to be included into rotor dynamic models. Neglecting the effect of this component may cause significant errors in the predicted results. Copyright

Place, publisher, year, edition, pages
2013. Vol. 135, no 3
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:hb:diva-11478DOI: 10.1115/1.4023052Local ID: 34166b69-2787-43a5-a66c-0b5a9700169cOAI: oai:DiVA.org:hb-11478DiVA: diva2:1057045
Note

Validerad; 2013; Bibliografisk uppgift: Article number 034501; 20130522 (andbra)

Available from: 2016-09-29 Created: 2016-12-16 Last updated: 2016-12-16

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