Amplitude descending screening method and vibrating screen

Abstract

The invention discloses a screening method with decreasing amplitude and a vibrating screen, belonging to the field of vibrating screening machinery, and is designed for improving the processing capacity and screening efficiency of a biaxial vibrating screen. The two vibrators of the vibrating screen are respectively arranged at the feed end and discharge end of the vibrating screen box, and the mass of the eccentric block of the vibrator at the feed end is greater than that of the eccentric block of the vibrator at the discharge end; the mass of the two vibrators is The center distance is greater than or equal to a quarter of the length of the screen box. When the vibrating screen is working, its vibration amplitude is elliptical, and the vibration amplitude of the entire screen box is distributed in a decreasing manner from the feeding end to the discharging end. The feeding end has large amplitude and strong vibration force, which is conducive to the screening of accumulated materials and improves the processing capacity. The amplitude of the discharge end is reduced and the vibration force is weakened, which is beneficial to improve the screening efficiency. It is especially suitable for the design and use of large and extra large vibrating screens.

Description

technical field [0001] The invention relates to the field of vibrating screening machinery, and mainly relates to an amplitude decreasing screening method and a vibrating screen which can improve the processing capacity and screening efficiency of the vibrating screen. Background technique [0002] At present, the trajectory of the biaxial vibrating screen is generally linear or elliptical. This type of vibrating screen has two vibrators, and the combined force of the vibration of the vibrators passes through the center of gravity of the screen box. The installation distance of the two vibrators is relatively close, generally located in the middle of the screen box, or connected by gears, or the motors are directly connected by couplings, and run synchronously in different directions. The movement trajectory of each part of the screen box is the same, and the amplitude and vibration intensity of each part are also the same. Because the material on the screen surface at the ...

AI Technical Summary

Problems solved by technology

Because the material on the screen surface at the feeding end of the vibrating screen is relatively concentrated, the distribution of the material on the entire screen surface is uneven, which directly affects the processing capacity and screening efficiency of the vibrating screen.

In addition, due to the relatively concentrated positions of the two vibrators, the vibration stress is also relatively concentrated, which is extremely unfavorable for the large-scale development of the vibrating screen.

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