The vibrating screen works on a circular motion and is mainly used in industries such as coal dressing, metallurgy, mine, power station, water conservancy project, building industry, light industry, and chemical industry, among others. It is an efficient screening machine for classifying bulk materials such as coal, minerals, coke, etc. There are 40 different specifications available for the YZS Series, with the heavy-duty type designed for large size materials and the light-duty type for middle and small size materials.
The vibrating screen moves in a circular motion and has multiple layers, making it highly efficient. The eccentric shaft vibration exciter and partial block help to adjust the amplitude, and the material drops down along the long line. During screen grading, the material is mechanically separated on screen plates. The rolling bearings in vibrating screens are subjected to high, mostly shock-type loads. Additionally, while rotating about their own axis, the bearings perform a circular, elliptical, or linear vibrating motion, resulting in high radial accelerations that stress the bearings, especially the cages.
The operating speeds of vibrating screens are usually very high, which results in bearing temperatures up to 20 to 30 degrees Kelvin higher than in normal applications. Moreover, considerable misalignments between the bearing locations and shaft deflections have to be accommodated.