Open AccessEffect of ball bearing misalignment on dynamic characteristics of rotor system
Author(s) -
Baogang Wen,
Meiling Wang,
Qingkai Han,
Yu Changxin
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1081/1/012014
Subject(s) - bearing (navigation) , vibration , ball (mathematics) , ball bearing , stiffness , helicopter rotor , mechanics , structural engineering , rotor (electric) , physics , control theory (sociology) , engineering , computer science , acoustics , mathematics , lubrication , geometry , control (management) , astronomy , artificial intelligence , quantum mechanics , thermodynamics
A theoretical model with 5 degrees of freedom (DOF) is derived for a rigid rotor system supported by two ball bearings considering the changes of the bearing stiffness due to misalignment. And then radial and axial vibrations of the rotor system and its bearing reactions under different misaligned offsets are investigated with theoretical and numerical analysis. Then, the effects of misalignment on the vibrations of rotor and the bearing, the variation of stiffness and reaction characteristics of the misaligned ball bearing are predicted theoretically. It is concluded that angular misalignment may cause axial vibration and parallel misalignment can bring out extra moment loads for misaligned bearing.