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Comparison of Life Calculations for Oscillating Bearings Considering Individual Pitch Control in Wind Turbines

verfasst von
Fabian Schwack, Matthias Stammler, Gerhard Poll, Andreas Reuter
Abstract

The fatigue life calculation of bearings under rotating conditions has been well researched and standardized. In contrast, for bearings in oscillating applications no international standards exist. As a result, pitch bearings in wind turbines are designed with different, non standardized approaches. Furthermore, the impact of individual pitch control on pitch bearings has not yet been studied. In this paper four approaches for fatigue life calculation will be applied and compared under individual pitch control conditions. For comparison, the loads and the bearing geometry of the reference turbine IWT 7.5 MW, which is individual pitch controlled, are used. This paper will show how the bearing life calculated by different approaches reacts to individual pitch control conditions. Furthermore, the factors for the modified rating life, according to the ABMA and ISO standards, which implement different operation conditions on the bearings in rotating applications, are calculated for the given loads and the given bearing geometry in oscillating applications.

Organisationseinheit(en)
Institut für Maschinenkonstruktion und Tribologie
Externe Organisation(en)
Fraunhofer-Institut für Windenergiesysteme (IWES)
Typ
Konferenzaufsatz in Fachzeitschrift
Journal
Journal of Physics: Conference Series
Band
753
ISSN
1742-6588
Publikationsdatum
03.10.2016
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Physik und Astronomie (insg.)
Elektronische Version(en)
https://doi.org/10.1088/1742-6596/753/11/112013 (Zugang: Offen)