Influence of Geometry of Hollow Rollers on the Contact Stress to the Large Bearings
Journal Title: RECENT - Year 2014, Vol 15, Issue 43
Abstract
The research answers to problems appeared in exploitation of large bearings, namely, uneven wear on the rollers and the raceways, as a result of high centrifugal forces. Currently, this problem is solved by execution of a geometric logarithmic profile of rollers which prevents the effects of dangerous contact stresses witch occur at the ends of their, profile which requires precision operation with high costs. This paper proposes the use of innovative design of hollow rollers whose profile remains cylindrical and optimization of cavity by finite element analysis performed with Nastran software. The research prove that hollow rollers with different cavities, tested in simulation, reduce inertial masses and have behaviour as good in deformations and much better in contact stress. The geometry of hollow rollers achieved by optimizing the hollow ratio of rollers influences the distribution of contact stress to the ends of roller and provides to the large bearings an increased durability by reducing uneven wear.
Authors and Affiliations
Sorin BARABAŞ, Adriana FLORESCU
Keywords
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