SU1386310A1 - Centrifuge - Google Patents

Abstract

SUBSTANCE: invention relates to centrifuges with vibrational discharge of sediment, used to separate liquid heterogeneous systems in the field of centrifugal forces. The purpose of the invention is to increase the production

Description

(L

00

with and with

Fig 1

quality and separation quality. The centrifuge contains a perforated rotor 5, body I, sediment collections 3 and filtrate collection 2, drive 14. And a circular vibration exciter, equipped with a disk 6 with radial channels 7 under the bottom of the rotor 5, in which weights 8 are placed, for example balls. When the disk 6 rotates relative to the cam 9, the weights of the 8th order periodically change their position, approaching and moving away from the rotor's axis of rotation 5, thereby changing the moment of inertia of the rotor and making circular oscillations. In connection with

With the exception of the centrifugal design of the heavily loaded support nodes of the circular vibration driver, the rotation speed of the rotor 5 can be significantly increased, and consequently, the productivity. In addition, due to the imposition of circular vibration with optimal parameters (frequency, amplitude), all periods of the centrifugal filtration process are intensified, which allows rj) to improve the quality of separation and, accordingly, reduce the residual moisture of the sediment. 5 il.

one

The invention relates to centrifuges for separating liquid inhomogeneous systems, namely, filtering centrifuges with vibratory discharge of sediment, and can be used in chemical, coal, food and other sectors of the national economy.

The purpose of the invention is to increase the productivity of the centrifuge and reduce the moisture content of the sediment.

1 shows a centrifuge, a longitudinal section; figure 2 - section aa in figure 1; Fig. 3 shows a section A-A in Fig. 1 in dynamics (after the relative displacement of the disk 6 and the cam 10 by an angle of 45 °); figure 4 - section bb in figure 2; on fig.Z - section bb In figure 2.

The centrifuge includes a housing 1, a filtrate collector 2, a sediment collector 3, a feed funnel 4 and a perforated conical rotor 5. The circular vibration exciter includes a disk 6 mounted under the rotor bottom with radial channels 7, in which loads 8 are placed, having the shape of rolling bodies, for example balls or rollers, as well as their movement mechanism, which is a cam 9, having several projections 10 and depressions 11 on the working surface, evenly spaced around the perimeter and in contact with the cargo 8. Disk 6 is

from the top and bottom parts fastened by a detachable connection. On the periphery of the disk 6 in the center of the channels 7 there is an annular groove 12 in which the protrusions 10 of the cam 9 are located. In the center of the disk 6 there is a stop 13, made in the form of an insert of elastic material or springs. It serves to delimit the channels 7 with weights 8. The rotor 5 is driven from the electric motor 14 via a V-belt transmission 15, the Pulley 16 of the electric motor 14 is equipped with an integrated elastic coupling I7 for vibrating the electric motor 14. The cam 9 is mounted with independent rotation relative to the disk 6. It the drive is carried out from the electric motor 18 through the wedge-drive transmission 19.

The centrifuge works as follows

By means of an electric motor 14, a rotor 5 is rotated via a V-belt transmission 15 and a disk 6. At the same time, depending on the mode required for processing this suspension, there are three possible options for operating the cam 9: the cam 9 does not rotate, it is fixed relative to the housing 1 (the electric motor 18 does not turn on); the cam 9 is rotated by the electric motor 18 via a V-belt transmission 19 in

one direction with the rotor 5, but with a different speed; The cam 9 is driven into rotation by means of the electric motor 18 via the V-belt transmission 19 in the direction opposite to the rotation of the rotor 5.

When the disk 6 rotates relative to the cam 9, the weights 8 in accordance with the profile of the working surface of the cam 9 periodically change their position within the channels 7, approaching the axis of rotation of the rotor 5 under the action of the projections 10 and moving away from it under the action of centrifugal forces in the region of the depressions 11 In connection with the movement of loads 8 in the radial direction, the moment of inertia of the rotor 5 changes, and it periodically changes the angular velocity of rotation, i.e. makes circular oscillations. Since the frequency of the circular oscillations depends on the speed of rotation of the disk 6 relative to 9, the presence of three modes makes it possible to regulate it within wide limits. The amplitude of the oscillations depends on the mass of the loads 8, and it can be changed by operating with their number in the channels 7. The elastic insert 13 prevents the loads 8 from colliding with their movement to the axis of rotation and also eliminates the imbalance due to the symmetry of the arrangement of the loads 8 due to for spontaneous rolling balls from one channel to another.

After the required rotational speeds of the rotor 5 and the cam 9 have been established, the slurry is continuously fed into the centrifuge rotor 5 through the feed funnel 4. Under the action of centrifugal forces and circular vibration, the liquid phase passes through the slots of the rotor sieve 5. And is discharged into the filtrate tank 2. The sediment of the solid phase under the action of centrifugal forces and circular vibration moves from the bottom of the conical rotor 5 up the sieve and is thrown through its wide edge into the collection 3 of the sediment. In this case, due to the exclusion from the design of the centrifuge of the load-bearing support units of the circular vibration exciter, the rotational speed of the rotor can be significantly increased compared with the known centrifuge, and, accordingly, the productivity. In addition, due to the imposition of circular vibration with optimal parameters (frequency,

0 amplitude) intensifies all periods of the centrifugal filtration process, which allows improving the quality of separation and, accordingly, reducing the residual moisture of the sediment.

5 Thus, centrifuge productivity and sedimentation separation quality are increased by increasing the rotor rotation speed and applying circular vibration in the optimal mode by supplying the circular vibration exciter with a disk with radial channels, in which weights shaped like rolling bodies, for example, balls, are placed with movement. mechanism for the movement of goods in the form of a cam, which, with its internal working surface, is in contact with the rolling elements and installed with a0 scheni relative to the disc.

Claims (1)

Invention Formula A centrifuge containing a housing, a perforated rotor, a rotary drive, a circular vibration exciter, including weights and a mechanism for their movement relative to the axis of rotation of the rotor, sludge and filtrate collectors, which is different in that 0 in order to increase productivity and reduce sediment moisture, the circular vibration exciter is a disk mounted under the rotor bottom, having radially located channels and an annular groove on the periphery, while the weights are placed in the channels of the disk and their movement mechanism is a cam mounted with the possibility of rotation relative to the disk and so that its protrusions are located in the annular groove of the latter. 13 ten (Dui3 F1 / G4 In-in Phi2.5