Gyratory Vibrating Screen (GVS)
GVS -also known as Plant Rotary Screen- is generally used
in chemical industries, agricultural industries, food processing and other light industries. The main function is to provide accurate separation of materials without product deterioration, thereby resulting greater product yields at higher production rates. This machine consists of top cover, top screen fame, spacer, bottom screen fame, the base space and the screen box. The unique gyratory motion of the near horizontal of the near-horizontal screen surface and the available screen mesh cleaning system secure the GVS quality as a high capacity product that efficiently developed for materials screening purposes.
Principle of Operation
The unique gyratory motion imparts a combination of actions to the material as it passes along the screen surface. It begins with a horizontal circular motion at the feed end, gradually diminishing along the length of the machine to an elliptical path, and finally to an approximate straight-line motion at the discharge end. There is no vertical component to this motion – thus keeping the material in constant contact with the screen surface.
The gyratory motion at the feed end of the machine immediately spreads the material across the full width of the screen surface to maximize screen utilization – even though the feed may come from a single point. At the same time, this motion stratifies the material, causing the fines to sink down against the screen surface. The particles that is appreciably smaller than the openings can simply pass through this part of the screen.As the circular motion diminishes into an elliptical path, the gentle near-horizontal motion causes the fine particles that are closer in size to the screen mesh-or nearer- to easily fall down as it goes through the mesh openings.
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