Analysis of the dynamics of a defective V-belt and diagnostic possibilities

Abstract

To investigate parametrically forced excitation and transverse oscillations of the belt with local heterogeneity, a new dynamic model of a V-belt drive with longitudinal motion has been developed. The model shows that when an appropriate quantitative and qualitative level of local heterogeneity is achieved, the oscillation mode of the belt starts to change, and the belt tensile force developing due to deformation of the belt significantly increases. Another V-belt drive dynamic model was developed based on the finite element model (FEM) analysis. This was used to examine the interaction of the belt, containing local heterogeneity, with the pulley in the area of contact angle. The natural frequencies of the system were calculated and the system's response to harmonic excitation was established. The correlation between the presence of defects in the belt and vibration activity of the driving pulley bearing housing was established. Using the developed model, the relationship between the defective belt and the dynamic component of the vibration reaction force of the driven pulley was studied. Spectrum components are identified and are used in the belt drive's practical diagnostics. The method developed based on these models enables non-destructive assessment of the failure state of the mounted belt to be performed in order to assess the failure state of different belt drive types.