SU1641464A1 - Vibrating screen - Google Patents

Abstract

This invention relates to the classification of bulk materials by size on sieves in the foundry, mining, construction, and other industries. The purpose of the invention is to increase the efficiency of screening when working with various materials and reducing the size of the screen. On the vibration isolators there is a box (K) 1 of the screen with a bottom 2, in which the sieve is fixed. On К 1 there are two self-synchronizing vibrators (BB) 10 with a device for moving them along K 1 to change the direction of oscillations of the screen. The rotation axes of explosive 10 are parallel to each other, perpendicular to the longitudinal plane of symmetry K 1 and located in a plane passing through the center of the oscillating parts of the ratchet Linea, the action of the total driving force is aligned with the center of mass of the oscillating parts of the roaritue 9, associated with a screw pair. The rotation of the explosive 10 is carried out in opposite directions. The screening mode is adjusted by means of a screw-nut drive mechanism, which moves the propeller 10 in opposite directions relative to the center of gravity to an equal distance so that the angle of the perturbing force is equal to 45 °. 2 з п.ф-л, 8 Il. CO G

Description

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The invention relates to devices for the classification of bulk materials by size on sieves and can be used in the foundry, mining, construction and other industries.

The purpose of the invention is to increase the efficiency of screening when working with various materials and reducing the size of the screen.

Figure 1 presents the roar, General view; figure 2 is a view of And figure 1; on fig.Z - section B - B in figure 2; 4 shows a section B - B in FIG. 3; Fig. 5 shows a screen, an embodiment; on figb - type G figure 5; 7 - section D - D in FIG. 5; on Fig - diagram of the movements of vibration exciters.

The device comprises a duct 1 with a bottom 2 and a lid Fixed by means of springs 4 on a frame structure (not shown). A 5 sieve is embedded in the box with a slab 6 extending it, which together form the second Rus in the form of a tray. The first Russian is formed by the bottom of the box.

On the lid 3 of the box 1, the guide 7 is fixed with the groove 8, in which the slider 9 is placed, with a debounce exciter 10 rigidly mounted on it. At the same time the slider and the groove have a dovetail profile. The slider movably through a bearing support 11 is connected with a screw 12 interacting with a nut 13 rigidly fixed on the guide 7. The end of the screw 12 is connected to an electric actuator 14 rigidly connected with the guides 15 and 16 passing through the nut housing 13 serving im support.

On the bottom 2 of the duct, another vibration exciter 10 is placed by similar means of movement. The axes of both vibration exciters are located in a plane passing through the center of mass of the oscillating parts of the rumble.

Vibro-exciters can be mounted on a rotating frame 17, the axis of rotation 18 of which is horizontal and passes through the center of mass of the oscillating parts of the rumble. In this case, the vibration exciters 10 are fixed on the frame 17 symmetrically with respect to the axis 18. On the frame 17 by means of the axis 19 fixed rigidly connected to the last nut 20 with the possibility of axial rotation relative to the frame 17. The nut interacts with the screw 21 connected to the electric actuator 22 fixed on the bracket 23 installed by means of axis 24 on box 1 with the possibility of axial rotation relative to the latter.

The device works as follows.

Before starting work, even when mounting the device, its center of gravity is determined without vibration exciters 10 and is marked with paint on the side and on the top. Then assemble the vibration exciter in accordance with FIG. 1.2 or 5.6. At the same time, their rotation axes are located at the same distance from the center of gravity.

The rotation of the exciters is carried out in opposite directions. When adjusting the screening mode with the help of a screw-nut drive mechanism, vibration exciters 10 are moved in opposite directions relative to the center

body to an equal distance so that the angle of the direction of the disturbing force is equal to 45 °. The mode parameters are refined using a specific material, for example, filling refractory

mixture clogged with cast metal scrap. The time for the complete sieving of the material and the time for the separation of the separated fractions by vibratory flow is determined.

If it turns out that the screening time

a little, then the waste material goes away with the waste. In this case, vibrators are removed from each other by the same amount until the screening is complete. In this position, the movement of the vibrators is stopped. The position is fixed by locking the screw - nut system.

The movement of the vibrators 10 on the sliders 9 is carried out according to FIG. 1.2 by

simultaneous rotation of the screws 12 with the help of the actuators 14 or, according to FIG.

In both cases (Fig. 8), the direction of the total driving force changes: Qi, On and From and, accordingly, the components change Qxi, QXII, QXIII and QYI, QYII and QYIII depending on the change in the magnitude of the slope of the rumble oscillations to the horizon.

In this case, the total driving force passes through the center of the weight of the screen. In position I, Qxi is smaller than QYI, angle 45 45 °, which contributes to the enhancement of screening effect as compared with transportation.

In position II, the value of QXII exceeds the value of QVII, and the angle a is 45 °, which contributes to an increase in the transport effect with respect to the sieving time, i.e. the material is rapidly moving to the left, however, it is probably not enough time for complete sifting, therefore position I in this respect is more preferable.

In position III, the flow direction changes in the opposite direction with respect to positions I and II.

Changing the position of the vibrators relative to the center of the body is usually necessary when changing materials depending on their fractional composition.

Claims (3)

Claim 1. Vibrating screen, including a duct mounted on vibration insulators, a sieve and a bottom fixed in the duct, two self-synchronizing vibrators mounted on the duct, the rotation axes of which are parallel to each other and perpendicular to the longitudinal plane of symmetry of the duct, and the total axis of the figure is drawn to each other. force is combined with the center of mass of the oscillating parts of the screen, and a device for moving the vibration exciters along the duct to change the direction of the screen oscillation, characterized in that Improving screening efficiency when working with various materials and reducing the size of the screen, the axis of rotation of the vibration exciters are located in a plane passing through the center of mass of the oscillating parts of the screen. 2. Vibrating screen according to claim 1, which is based on the fact that the device for the movement of the exciters is made in the form of a slider installed in the guide and connected with the screw of the screw pair, while the exciter is fixed on the slider. 3. Vibrating screen according to claim 1. This is due to the fact that the device for moving the exciters is made in the form of a rotating frame with its drive 0 rotation, the axis of rotation of which is located horizontally and passes through the center of mass of the oscillating parts of the screen, and the exciters are fixed on the frame symmetrically relative to the axis of rotation of the frame. Ida Fig.Z FIG. 6 17 10 V 20 yy 20 19 17 I   | / v) yA 1 23 /////// dd Nj | 1 23 24 22 / Fig 7 /////// Fig 8