The vibrating screen works by using the reciprocating rotary vibration produced by the vibrator excitation. The upper rotating weight of the vibrator makes the screen surface produce plane rotary vibration, while the lower rotating weight makes the screen surface produce conical rotary vibration, and the combined effect makes the screen surface produce compound rotary vibration. Its vibration trajectory is a complex spatial curve. The curve is projected as a circle in the horizontal plane and an ellipse in the vertical plane. The amplitude can be changed by adjusting the excitation force of the upper and lower rotating weights. And adjusting the spatial phase angle of the upper and lower hammers can change the curve shape of the trajectory of the screen surface and change the trajectory of the material on the screen surface.

Applications

Vibrating screen has a wide range of application, involving almost all aspects of life in processing and manufacturing need to use various types of vibrating screen.
Vibrating screen is mainly used in mining, coal, smelting, building materials, refractory materials, light industry, chemical industry, medicine, food and other industries.
Vibrating screens are most used in mineral processing plants, and can be divided into the following types according to their different transmission mechanisms: eccentric vibrating screen, inertial vibrating screen, self-centering vibrating screen, resonant screen.

Working characteristics

①, using block eccentric as excitation force, strong excitation force.
②, the screen crossbeam and screen box adopt high strength bolts, with simple structure and convenient and quick maintenance.
③. Adopting tire coupling, flexible connection, smooth running.
④, using small amplitude, high frequency, large inclination structure, so that the machine has high screening efficiency, maximum processing, long life, low electricity consumption and low noise.
According to the structure and working principle of the screening machinery are roughly the following categories.
1, tumbler screen The working surface is composed of a rolling shaft arranged horizontally.
2、Tumbler screen The working surface is composed of a rolling shaft arranged horizontally. Fixed sieve The working part is fixed and does not move, and the material is sieved by sliding along the working surface. Fixed grizzly screen is one of the more used in mineral processing plant, generally used for pre-screening before coarse or medium crushing. It is simple in structure and convenient in manufacture. It does not consume power and can unload the ore directly onto the screen surface. The main disadvantage is low productivity, low screening efficiency, generally only 50-60%.
3, plane motion sieve The machine body is a plane swing or vibration. According to its plane motion trajectory is also divided into linear motion, circular motion, elliptical motion and complex motion. Shaking sieve and vibrating sieve belong to this category.

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