A1 Journal article (refereed), original research

Effect of off-sized balls on contact stresses in a touchdown bearing


Publication Details
Authors: Neisi Neda, Sikanen Eerik, Heikkinen Janne E., Sopanen Jussi
Publisher: Elsevier
Publication year: 2017
Language: English
Related Journal or Series Information: Tribology International
ISSN: 0301-679X
eISSN: 1879-2464
JUFO-Level of this publication: 2
Open Access: Not an Open Access publication

Abstract

Contact stresses of a ball bearing type touchdown bearing with off-sized balls are studied. The touchdown bearing model includes descriptions of the stiffness, damping and friction between bearing components. The model gives the contact deformations between the balls and bearing races, contact forces, and Hertzian contact stresses in each ball. The bearing model is used in simulation together with a model of a flexible rotor. The results show that off-sized ball or balls alters the contact stiffness between the balls and bearing race and the localized deformation of race. The contact force and stresses consequently change. The stress values are dependent not only on the dimension of the off-sized ball or balls but also their location.


Last updated on 2018-19-10 at 07:55