Interaction of Rolling-Element and Fluid-Film Bearings Dynamic Characteristics in Hybrid Bearings

摘要

The reliability of rotating machinery is to a considerable degree determined by the bearing units. For several applications the requirements in rotation speed, bearing load and maximal vibration level are so extreme that neither rolling-element bearings nor fluid-film bearings could provide the necessary performance characteristics in any operational regime. Hybrid bearings, which are a combination of rolling-element and fluid-film bearings, can improve performance characteristics and reliability of the rotor-bearing systems. The article presents the approach to the formation of the calculation and analysis methods of dynamic characteristics of the hybrid bearings, functioning by means of the speed division. This construction allows improving the reliability and supporting node resource of support by means of division and combined applications of ball and fluid-film bearings at different work stages. It also produces great vibration stability.