Abstract
This paper investigates a method to dynamically model compound faults on the inner and outer rings of an angular contact ball bearing as well as their effects on its dynamic behavior. Gupta’s dynamic modeling method is used to consider changes in the deformation and direction of the contact load when the ball passes through the damaged area and to develop a dynamic model of compound faults in the angular contact ball bearing. The step-changing fourth-order Runge–Kutta method is used to solve the dynamic compound fault model. The time-domain signal of vibration responses in the case of a single fault in the inner and outer rings exhibited a certain periodicity, and the frequency of faults in the envelope spectrum was clear. By comparison, the periodicity of compound faults was not clear. The signals of compound faults were decomposed by the dual-tree complex wavelet transform to identify their characteristic frequency. Errors occurred between the characteristic frequency of the theoretical fault and its simulated value. They increased with the rotational speed and decreased with an increase in axial load, whereas the influence of radial load on them was minor. For compound faults on the inner and outer rings of an angular contact ball bearing, this study provides a modeling method that can describe changes in the deformation and direction of the contact load when the ball passes through the damaged area of the inner and outer rings. The work here can provide an important foundation for fault identification in angular contact ball bearings.
Highlights
Angular contact ball bearings (ACBBs) play an important role in the safety and reliability of mechanical systems
According to whether the rotational characteristics of the bearing elements are considered, such dynamic models can be divided into two types: the simplified spring-mass model and the complete dynamics model. e simplified spring-mass model uses a nonlinear spring and damping to handle the contact characteristics between the balls and the raceways. e dynamic model has been proposed to investigate the effects of multipoint faults in the races on
Some limitations persist in the literature: (1) Simplified models cannot describe complex dynamic behavior and usually focus on the characteristics of planar motion. ey are not suitable to deal with ACBBs. (2) In the processing for complete dynamic modeling, the fault excitation is characterized by some impulse function that cannot describe changes in the deformation and direction of the contact load when the ball passes through the damaged area
Summary
Lihai Chen ,1,2,3 Ma Fang ,2 Ming Qiu ,1,3 Yanfang Dong ,1,3 Xiaoxu Pang ,1,3 Junxing Li ,1,3 and Chuanmeng Yang 1,3. Is paper investigates a method to dynamically model compound faults on the inner and outer rings of an angular contact ball bearing as well as their effects on its dynamic behavior. Gupta’s dynamic modeling method is used to consider changes in the deformation and direction of the contact load when the ball passes through the damaged area and to develop a dynamic model of compound faults in the angular contact ball bearing. For compound faults on the inner and outer rings of an angular contact ball bearing, this study provides a modeling method that can describe changes in the deformation and direction of the contact load when the ball passes through the damaged area of the inner and outer rings. For compound faults on the inner and outer rings of an angular contact ball bearing, this study provides a modeling method that can describe changes in the deformation and direction of the contact load when the ball passes through the damaged area of the inner and outer rings. e work here can provide an important foundation for fault identification in angular contact ball bearings
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