Nonlinear Dynamic Numerical Analysis of Solid-liquid Separation Rolling Bearing-Rotor System Finite Element Discrete Modeling

Based on a rolling bearing-single disc rotor, centrifugal force is generated due to the influence of unbalanced factors such as rotor eccentric excitation, bearing restraint stiffness, and rotating stator clearance, which leads imbalance system, resulting in problem friction between stator. This paper establishes dynamic model single-disk supported by bearings, fourth-order Runge-Kutta numerical integration method used solve it. Bifurcation behavior nonlinear response at rotational speed. The results show that characteristics system are significantly different changes elliptic eccentricity, speed, constraint stiffness; when speed increases, gradually appears bifurcation, quasi-periodic motion, instability increases. Therefore, reasonable selection working gap can reduce non-periodic vibration caused improve stability operation.