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Influence of the thrust bearing on the natural frequencies of a72-MW hydropower rotor
Hydro-Québec Research Institute, Varennes, Québec, Canada.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Number of Authors: 2
2016 (English)In: IOP Conference Series: Earth and Environment, ISSN 1755-1307, E-ISSN 1755-1315, Vol. 49, no 8, 082024Article in journal (Refereed) Published
Abstract [en]

The thrust bearing is an essential element of a hydropower machine. Not only does it carry the total axial load but it also introduces stiffness and damping properties in the system. The focus of this study is on the influence of the thrust bearing on the lateral vibrations of the shaft of a 72-MW propeller turbine. The thrust bearing has a non-conventional design with a large radius and two rows of thrust pads. A numerical model is developed to estimate natural frequencies. Numerical results are analyzed and related to experimental measurements of a runaway test. The results show the need to include the thrust bearing in the model. In fact, the vibration modes are substantially increased towards higher frequencies with the added properties from the thrust bearing. The second mode of vibration has been identified in the experimental measurements. Its frequency and mode shape compare well with numerical results.

Place, publisher, year, edition, pages
2016. Vol. 49, no 8, 082024
Keyword [en]
rotordynamic rotor dynamic hydro power
National Category
Other Mechanical Engineering
Research subject
Computer Aided Design
Identifiers
URN: urn:nbn:se:ltu:diva-62138DOI: 10.1088/1755-1315/49/8/082024ScopusID: 2-s2.0-85012195542OAI: oai:DiVA.org:ltu-62138DiVA: diva2:1076664
Conference
28th IAHR symposium on Hydraulic Machinery and Systems, Grenoble, July 4-8, 2016
Funder
Swedish Energy Agency, 192640
Note

Konferensartikel i tidskrift 2017-02-23 (andbra)

Available from: 2017-02-23 Created: 2017-02-23 Last updated: 2017-02-23Bibliographically approved

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Aidanpää, Jan-Olov
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf