A circular vibrating screen operates using a motor to drive an eccentric shaft, which creates a circular motion of the screen. This motion causes the materials on the screen to move in a circular path, facilitating the separation of particles based on size. Here is a step-by-step explanation of how a circular vibrating screen works.

Working principle of circular vibrating screen

Motor and Eccentric Shaft: The operation begins with an electric motor that drives an eccentric shaft. This shaft is not centered, meaning its axis of rotation is offset. As the motor rotates the shaft, the eccentric design causes the shaft to move in a circular motion.

Screen Frame: Attached to the eccentric shaft is a screen frame that holds one or multiple screening surfaces or meshes. As the eccentric shaft rotates, it imparts a circular motion to the screen frame.

Vibration: The circular motion generated by the eccentric shaft creates vibrations in the screen frame. These vibrations are transmitted through the screen surface.

Material Movement: When materials are fed onto the screen surface, the circular motion of the screen causes the particles to move in a circular path. This movement helps to stratify the materials, causing finer particles to fall through the screen openings while larger particles remain on top and move towards the discharge end.

Separation: The separation process is achieved as the material travels across the screen surface. Smaller particles pass through the openings of the screen, while larger particles are conveyed to the end of the screen and are discharged.

Adjustable Amplitude and Frequency: The amplitude and frequency of the vibrations can often be adjusted to suit different materials and screening requirements. This adjustability helps optimize the separation efficiency and accuracy.

Screen Decks: Circular vibrating screens can have single or multiple screen decks. Multiple decks allow for the separation of materials into different size fractions simultaneously. Each deck has a different screen mesh size, enabling the sorting of various particle sizes.

The key advantages of circular vibrating screens include their ability to handle large volumes of material, their efficiency in separating different particle sizes, and their robustness, which makes them suitable for a wide range of industries such as mining, quarrying, and recycling.

Overall, the combination of circular motion, adjustable vibration parameters, and the use of multiple screen decks makes circular vibrating screens versatile and efficient for many applications requiring particle separation.