SU1438859A1 - Vibrating screen - Google Patents

Abstract

The invention relates to a device for the separation of bulk materials and m. used in the coal, metallurgical and other industries of the national economy. The screen includes a box (K) 1 with CHTai-ffl mounted on shock absorbers 2, an inertia vibrator 3, a frame 4 and a device for adjusting the amplitude of vibrations along the material movement direction, including a set of weights 5. The latter are suspended from the loading end K 1 by car te 6 by hinge 7 with the possibility of swinging around the suspension point. The vibrator 3 sets the vibrations to K 1. The loads 5 limit the vertical component of the vibration amplitude — the loading part K 1 while maintaining its horizontal component. Due to the displacement of the center of mass of the oscillating parts of the screen in the direction of the cargo 5, the vertical component of the vibration amplitude of the loading part K 1 increases. A change in the vibration trajectory K 1 leads to a reduction in the comminution of the material in the loading part K 1 and an increase in the BpeMemi of its location on the screens in the discharge part K 1, which contributes to an increase in the quality of screening. 3 il.

Description

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The invention relates to separation devices, bulk materials and can be used in coal, metallurgical and other industries of the national economy.

The goal, the invention is to simplify the design and improve the quality of screening.

FIG. 1 shows a vibrating screen; in fig. 2 - the trajectory of oscillations of the discharge part of the sieves {in FIG. 3 - oscillation trajectory of the loading part of the sieves.

The screen consists of a box 1 with a tamper mounted on shock absorbers 2, an inertial vibrator 3, a frame 4 and a device for adjusting the amplitude of vibration along the direction of movement of the material, a set of weights 5 suspended from the loading end of the box 1 on the car 6 by means of a hinge 7.

The roar works as follows

The vibrator 3 sets the oscillations of box 1. Suspended loads 5 limit the vertical component of the vibration amplitude of the loading part of duct 1 while maintaining its horizontal component. In this case, due to the displacement of the center of mass of the oscillating parts of the roar in the direction of the goods 5

an increase in the vertical component of the amplitude of the vibrators of the unloading part of the duct 1 occurs. The vibration trajectories of the duct take the form shown in FIG. 2 and 3. This distribution of vibration amplitudes contributes to a reduction in the comminution of the material in the charging section and an increase in its residence time on the screens in the discharge section, which improves the quality of screening.

The dimensions of the vibration trajectories, their redistribution along the length of the box 1 change when the screen is adjusted by taking the weight of the loads 5.

Claims (1)

Invention Formula Vibrating screen, including a sieve box mounted on ayortizers, an inertia vibrator, a frame and a device for adjusting the vibration amplitude along the material movement direction, due to the fact that, in order to simplify the design and improve the quality of screening, the device for adjusting the amplitude of the vibrator performed in the form of a set of goods suspended at the end of the box with the possibility of swinging. around the point of suspension as2 a.J