vibrating screen diagram. The fine grained material reaching the sieve surface can be smoothly shifted due to its smaller size than the mesh size. And finally, the separation of the coarse and fine grained materials is completed, and the screening process is completed.
There are also vibrating screens that are loaded by the center and the product moves radially to the outputs that are on the periphery. For the correct advancement of the product it is necessary that the process is continuous, and it is due to the vibration if the screening surface is horizontal. Most of the screens have a certain inclination in such a way that the advance movement of the product is due to a combination between gravity and vibration.
The simplest working principle of a vibrating screen can be explained by using a single deck screen and placing it on an inclined frame. The frame is mounted on a spring. In the majority of cases, the types of screen decks that you will be operating will be either the horizontal screen or the inclined vibrating screen.
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The Vibrating Screen is available in single and multiple deck units for floor mounting or suspension. The side panels are equipped with flanges containing precision punched bolt holes so that an additional deck may be added in the future by merely bolting the new deck either on the top or the bottom of the original deck. The advantage of this feature is that added capacity is gained without purchasing a separate mechanism, since the mechanisms originally furnished are designed for this feature. A positive method of maintaining proper screen tension is employed, the method depending on the wire diameter involved. Screen cloths are mounted on rubber covered camber bars, slightly arched for even distribution.
Standard screens are furnished with suspension rod or cable assemblies, or floor mounting brackets. Initial covering of standard steel screen cloth is included for separations down to 20 mesh. Suspension frame, fine mesh wire, and dust enclosure are furnished at a slight additional cost. Motor driven units include totally enclosed, ball bearing motors. The Vibrating Screen can be driven from either side. The driven sheave is included on units furnished without the drive.
The unit consists of the freely suspended screen body and a shaft assembly carried by the screen body. Near each end of the shaft, an eccentric portion is turned. The shaft is counterbalanced, by weighted fly wheels, against the weight of the screen and loads that may be superimposed on it. When the shaft rotates, eccentric motion is transmitted from the eccentric portions, through the two bearings, to the screen frame.
The vibrating screen works by using the double rotation vibration produced by the vibrator. The upper rotating weight of the vibrator makes the screen surface vibrate in plane, while the lower rotating weight produces cone shaped rotary vibration. The combined action makes the screen surface Produce compound rotation type vibration.