Evaluation of effect of oil film of rotor bearing

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Alekseeva, L.B.^1 ; Maksarov, V.V.^1

Saint-Petersburg Mining University, 21st Line V.O. 2, St.-Petersburg

199106, Russia^1

关键词: Bearing assemblies;    Buckling failure;    Fixed supports;    Inertial properties;    Radial clearance;    Rotor spinning;    Stability zones;    Static and dynamic loads;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/2/022003/pdf
DOI  :  10.1088/1757-899X/327/2/022003

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The high-rpm rotors were subjected to the dynamic analysis. Oscillations of a rotor spinning in gapped bearings were considered. It was stated that the rotor necks motion pattern depends on a lot of factors: a ratio of static and dynamic loads on the bearing, radial clearance size, presence of oil film between a neck and a bearing, elastic and inertial properties of a mounting group. The most unfavourable mode where static and dynamic loads are equal was detected without taking into account the oil film impact. The impact of oil film on the bearing assembly dynamics is significant in high-rpm rotors. The presence of oil film can possibly cause rotor buckling failure and self-starting. Rotor motion stability in small was studied. Herewith, various schemes were considered. Expressions, determining the stability zones of a rigid rotor on the fixed support and the supports with elastic and inertial elements, were given.