SU1251965A1 - Screen - Google Patents

Description

one

The acquiton is related to the technique of separating bulk materials by size and can be used in the world of building materials, mining, chemical, chemical industry and other branches of the national economy.

The purpose of the invention is to improve the quality of the screening process by creating the most beneficial effect of the oscillating mode of the screening surface by combining its longitudinal and transverse vibrations and gradually reducing the amplitude of the transverse vibrations by the end of the screening surface.

Figure 1 shows the proposed roar, side view; figure 2 is the same, the view in the plan.

The screen contains frame I, which is provided with a beam 2, made in the form of two racks 3, the lower ends of which are connected to frame 1 by means of hinged supports 4, and the upper ones are interconnected by means of a crossbar 5. On the screen there is an elastic screening surface 6 fixed with a bottom edge on the frame I, and the upper on the crossbar 5 of the rocker arm 2. On the other side of the crossbar 5 of the rocker arm 2, vibration exciter 7 is fixed. To reduce the dynamic loads on the frame 1, the upper part of the rocker arm 2 is connected to frame I by means of elastic damping lementov 8, for example springs.

The roar works as follows.

Under the action of the vibration exciter 7 yoke 2, together with the upper part of the CVD

Order 4560/8

Proi-polygr. pr-tie, Uzhgorod, st. Project, 4

652

the elastic screening surface 6 is constantly in reciprocating motion with the center of rotation in the hinge bearings 4. This movement at each point of movement can be decomposed into two components: the perpendicularly screening surface 6 at speed V, and along the screening surface 6 with speed

2 The first component of the movement provides transverse oscillations of the screening surface 6, the second is longitudinal. The amplitude of the transverse vibrations of the screening surface 6 has a maximum value at the attachment point of the surface 6 to the crossbar 5 of the rocker arm 2, and at the attachment point to the frame 1 it decreases to zero.

The material supplied to the upper part of the elastic screening surface 6, under the action of the greatest amplitude of transverse vibrations, is intensively mixed and classified into fractions. The combination of transverse and longitudinal vibrations of the screening surface qualitatively improves the screening process, preventing clogging of openings with difficult grains and sticking in burning fractions.

As the material passes through the screening surface 6 and approaches its end, its transportation speed decreases due to a decrease in the amplitude of transverse oscillations of the sieve, which further improves the quality of material separation into fractions.

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Circulation 565

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Claims (1)

'' SCARP, including a frame, an elastic screening surface fixed with a lower edge to the frame, a vibration exciter and elastic damping elements, characterized in that, in order to improve the quality of the screening process by creating the most favorable vibrational mode of the screening surface by combining its longitudinal and transverse oscillations and a gradual decrease in the amplitude of transverse vibrations to the end of the screening surface, the screen is equipped with a beam made in the form of two posts, the upper ends of which are connected s by the crossbar and the bottom pivotally mounted on the frame, the crossbar on the one hand is fastened the upper edge of the screening surface and with the other exciter.