Dynamic screen is a common equipment in mining machinery, and its vibration is mainly realized by exciter.The exciter forms are diverse, and the widely used eccentric-block external structure has the characteristics of light weight, compact structure, lubrication concentration of transmission parts, convenient maintenance and low manufacturing cost.However, there is a general problem in this structure, that is, the bearing life in the exciter is short, and the bearing heating and burning loss often occur, which seriously affects the normal operation of the vibrating screen.
The operating condition of the exciter is harsh, not only the environment humidity is large, the dust is much, the speed is high (750~1400r/min), and there is a strong vibration impact.After practical experience, the main bearing damage is:
