Vibration characteristic analysis of rolling bearing outer ring looseness fault based on dynamics
JIA Xiangyang
TENG Wei
KONG Lingxing
PENG Dikang
MA Zhiyong
LIU Yibing
Abstract：Rolling bearing looseness faults are likely to induce transmission system fault.Considering the factors such as nonlinear contact force of rolling bearings,rub-impact force,damping force between outer ring and housing,a six-degree-of-freedom nonlinear dynamics model was established under the fault of rolling bearing outer ring looseness,and the vibration characteristics of rolling bearing outer ring looseness were analyzed.The simulation results show that the characteristic frequency of the outer ring looseness fault is presented as the rotational frequency of the rotating shaft and its multiple components,and the actual tested wind power bearing ring fault data verifies the accuracy of the model.The results of this paper show that the rolling bearing outer ring looseness is caused by loosing between the outer ring and the housing,and the cyclic impact and friction between the outer ring and housing are formed under the unbalance force with the rotational speed of the shaft and its harmonics.The research results provide a theoretical basis for realizing the mechanism analysis of rolling bearing outer ring looseness and fault diagnosis of the rolling bearing.
Keywords：Rolling bearingOuter ring loosenessDynamical modelFault characteristic
Publication Date：2025-10-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 63-70 )