What is the influence of eccentric vibration of the vibrating screen on the rolling bearings?
The vibration system consisting of bearings and eccentric systems can be considered as a single degree of freedom system. There is a certain value of the resonant frequency of the bearing shaft and the driven shaft system. The vibration of the silo wall is resonant if the excitation frequency is close to the resonance frequency. In addition, due to eccentric inertial force, the bending vibration will occur, and if the speed of the anti blocking device approaches the critical value, the bending resonance will occur.
The centrifugal force of vibrator eccentric quality work generated when the eccentric shaft bending deflection, leading to the relative quantitative disc feeder bearing inner and outer rings, due to the eccentric vibration will result in the rotation frequency and each order harmonic caused by, so the running of the inertia force and inertia will cause the bearing dynamic reaction force and vibration. Destroy the stable working state of rolling bearings and other components, to generate high-frequency vibration. The analysis and analysis show that when the vibration frequency of the exciter bearing is the same as the natural frequency of the elastic vibration of the sieve case, it will cause the strong vibration of the elastic body of the sieve case.
The vibration exciter used in vibration screen is mostly eccentric shaft exciter and box type vibration exciter. Eccentric bearing vibration device has convenient installation and adjustment, but the cost is high, and the eccentricity is not adjustable; box vibrator with adjustable to the relative position of the fan-shaped eccentric block, can realize the vibrating force adjustment, so as to achieve the purpose of adjustable amplitude.
