The influence of the construction stiffness in the roller bearings arrangement with the line contact on their durability

This article deals with the arrangement stiffness of the roller bearings with the line contact in the bearing units with regard to their durability. It analyses stationary and flanged standardized bearing units with the roller bearing using finite-element analysis. The article describes Hertz, Lundberg, Palmgren and Stribeck theories and published evaluation methods of the stiffness for the bearing units. It also evaluates the stiffness influence (variable cross-section characteristics) and other construction influences using suitable procedures where the standard for durability calculation is not taken into consideration. On the basis of the finite-element analysis results there has been created the mathematical model of the stiffness influence on more accurate determination of the basic durability of the roller bearings with the line contact. (paper)