SU1540870A1 - Vibroshaker with deformable seiving surface - Google Patents

Abstract

The invention relates to a technique for separating materials by size by sieving and can be used in the metallurgical, construction and other fields. The goal is to simplify the design and increase reliability. The vibrating screen includes a frame, support beams in the form of eccentric shafts (EV), which are mounted in a frame movably for rotation and connected to an 8 rotation drive, and the sleeves (EV) surrounding the EV. Sections 11a and 11b of the screening surface (PP) are fixed to B. When the rotational drive 8 is working, rotating in B in the same direction and due to oppositely directed eccentricities of alternating electrons, the spans of neighboring electrons take up a close and distant position per revolution. Alternating along the lengths sections 11a and 11b of PP, alternately alternately tensioned, then sag, creating a wave-like deformation of sections of PP. The combination of the initial positioning of alternating EVs makes it possible to select the speed with which the EV is removed, and therefore the force of the throwing effect of the tensioning screen on the material. 4 il.

Description

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The invention relates to a technique for the separation of materials by size by npoceHBaHHHj, in particular, to vibrating screens, and can be used in mineral processing, in the metallurgical industry, in the building materials industry and in other sectors.

The aim of the invention is to improve operational reliability and simplify the design.

Figure 1 shows the device, side view; figure 2 is the same, top view; in FIG. 3, node I in FIG. 2 in FIG. 4 is view A in FIG. 2; in FIG. 3 an example of installation on the cross-arms of thickened sieve cards molded from elastomer; figure 6 - section BB in figure 5.

The vibrating screen contains a frame i (Fig. 1), in which transverse support beams are located, made in the form of eccentric shafts 2 mounted in the sides 3 of the box with the possibility of rotation. The tails of the shafts 2 are provided with gears 4, which connect them by means of gears 5 to a longitudinal distributing shaft 6, which through coupling 7 is connected to an electric motor 8. Shafts 2 on spans between flanges provided with sleeves 9 in which the shafts freely rotate. On the sleeves 9, by means of clamping strips 10, an elastic screening surface 11 is fixed, thus divided into alternating sections Ha and 116. The vibrating screen frame is provided with an input 12 and a discharge 13 chute.

As can be seen from the diagram (Fig. 1), the direction of eccentricities of adjacent shafts is antiphase, and gears 5 are installed so as to ensure the transfer of rotation to shafts 2 in the same direction. The design allows for the combination of the same and opposite rotation of the adjacent shafts 2 with a change in the installation phase of the initial eccentricities.

In the screen of fine or medium screening, when the requirements for the carrying capacity of the screening surface are increased, the sections On and 116 of the screening surface can be made as separate screen cards molded from elasto

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measure and having a thickness more or less commensurate with the diameter of the sleeve 9 (figure 2). Such sieve cards are provided with fixed depressions 1 4 along their fixed edges and loop-shaped protrusions 15 in which holes are made for sleeve 9. Along the butt edges when the projections of card 11 are mutually aligned with the depressions of card 116, the fixed cards are fixed with sleeve 9. Shafts 2 in this case , for ease of installation, are made detachable according to well-known design principles.

Vibrating screen works as follows.

When the engine 8 (Fig. 1) is operated from the longitudinal shaft 6, through pairs of gears 4 and 5, the rotation is transmitted to eccentric shafts 2. Rotate in the same direction and due to oppositely directed eccentricities of alternating shafts, which is determined by their initial installation, the spans of adjacent shafts are sequentially period of turnover occupy close and distant position. As waps 2 approach each other, the area of the screening surface 11a sags, and when the shafts are removed, it stretches, while the state of the area 116 adjacent to it is opposite. Thus, all the alternating lengths of the screening surface alternately tension, then sag, creating a wave-like pattern of deformation of the screening surface.

When feeding the source material through the chute 12, the particles of the rumbling mass are divided into two size classes by the action of the vibro-forming state of the sifting surface: the small sieve is sifted through the apertures of the surface 11, and the large one is discharged by the chute 13.

A similar pattern of deformation of the screening surface will be with the same direction of eccentricities of all shafts, but with the opposite direction of rotation of alternating shafts. However, it is not difficult to see that by changing the above-mentioned settings, it is possible to obtain a different nature of the deformation of the sections of the sieve.

By combining the direction of rotation of the alternating shafts 2 by installing gears 4 and 5 and setting the mutual direction of the initial

the positions of their eccentricities achieve the selection of the speed with which the rolls are removed, and consequently, the strength of the throwing effect of the tensioning sieve on the material, as well as the selection of the position of the tensioned portion of the sieve at the moment of active influence on the material, t, e. the direction of the flip relative to the sieving plane, affecting the carrying capacity of the screen. Both the force of action and its direction are determined by the experience of sifting materials with different physical and mechanical properties.

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Vibrating screen with a deformable screening surface, including a frame, support beams, between which there are areas of an elastic screening surface and an actuator, characterized in that, in order to increase the safety of operation and simplify the design, the cross bars are made in the form of eccentric shafts installed in the frame rotation and the drive-related rotation and the sleeves that surround the shafts, and the areas of the screening surface are attached to the sleeves.

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Claims (1)

Claim A vibrating screen with a deformable penetrating surface, including a frame, support traverses, between which there are sections of an elastic screening surface and a drive, characterized in that, in order to increase the work safety and simplify the design, the traverses are made in the form of eccentric shafts installed in the frame with the possibility of rotation and rotation associated with the drive and covering the shafts of the bushes, and sections of the screening surface are fixed to the bushes. Type A Fig 4 Fig.Z Compiled by B. Levchaev Editor G. Gerber Tehred L. Oliinyk Proofreader V. Girnyak Order 245 Circulation 516 Subscription VNIIIPI State 113035, Committee for Inventions and Discoveries at the State Committee for Science and Technology of the USSR Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent, Uzhhorod, st. Gagarina, 101