SU1572711A1 - Seiving device - Google Patents

Abstract

This invention relates to a technique for separating materials by size and can be used in agriculture and other industries. The purpose of the invention is to reduce the dynamic loads on the frame of the device during operation. For this purpose, shock absorbing struts (AC) are mounted on frame 12 by means of curved soles 13, which are connected to this frame by bolted connection 14 through elastic washers 15. ACs are made in the form of hollow glasses, inside which are located rods 20 with springs 18, 19. At the upper ends rods 20 pivotally mounted frame with mounted on it of sieve mills and vibro. When the vibrodrive is turned on, the device begins to reciprocate. At the same time, by connecting the AC to the frame 12 by means of the soles 13, it is possible to reduce the dynamic loads. This also contributes to the spring 18, 19, damping load in the vertical plane. 5 il.

Description

This invention relates to a technique for separating materials by size and can be used in agriculture and other industries.

The purpose of the invention is to reduce the dynamic loads on the frame during operation of the device.

FIG. 1 shows a screening device, general view; in FIG. 2 shows section A-A in FIG. 1, in FIG. 3 - node I in FIG. 1h; FIG. 4 - section bb in figure 1; in FIG. 5 is a section bb In figure 4.

The device consists of a frame 1 with a vibrodrive 2 fixed on it and lattice mills — the upper 3 and lower 4 and 5. At the end of the upper sieve mill 3, tray 6 is fixed. The inner cavity 7 of the tray 6 is connected to the mill 3 and is divided by partitions forming sections 8, suitable to the mill 4, and sections 9, going to the mill 5. The frame 1 is mounted on a rack 10 and connected to the last hinge 1 1. The struts 10 are supported on the frame 12 by curved soles 13, while the stand can oscillate at the point of attachment, but only in the direction of the forces from the drive 2. The attachment of the stand 10 to the frame 12 is made through the curvilinear surface with bolt joint 14, B The place of attachment to the rigid rod (bolt) connecting the rack with the frame is equipped with elastic washers 15 (for example, from the Shape plate placed between the washers 16.

The rack 10 includes a supporting rod 7 with a curved support sole 13 and a shock absorber consisting of two springs 18 and 19 placed on the rod 20 through a rigidly mounted separating washer 21. The rod ends with a hinge N. The springs with a rod along

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placed in the glass 22, mounted on the supporting rod 17. The top of the glass 22 has a thread on which is mounted a cap 23 that holds the springs.

The device works as follows.

Seeds are fed to the upper sieve mill 3 and under the influence of vibrations created by the vibration actuator 2, they descend along an inclined sieves plane, and as they move along the webs, size is calibrated in the first section in width (first half of the sieve mill 3) and further in thickness. When moving from sieve cloths, nonstandard and pubescent seeds, as well as large impurities (for example, stones), disappear. Seeds that have passed through the screen sieve fall into the tray 6 into its internal cavity 7 and are distributed by sections 8 and 9 respectively to the bottom sieve mills 4 and 5, where they are finally calibrated, the sowing fraction goes off, and small seeds fall through sieve and output separately.

When the device is operating, the vibrodrive 2 excites oscillations of the frame 1, in this case a reciprocating movement of the frame occurs due to the hinged joint 11 with the struts 10 fixed to the frame 12 by the bolted joint 14, which allows to oscillate on the curved sole 13 due to elastic washers 15, placed between the washers 16, and the presence of springs 18 and 19, placed on the rod 20 in the glass 22, mounted on the supporting rod 17, provides the oscillation of the frame 1 and in the vertical plane. The installation of the springs 18 and 19, fixed by the cap 23, through the washer 21 provides the damping of the resonant oscillations that occur when starting (accelerating) and stopping the device.

Claims (1)

Invention Formula A screening device, which includes a frame with sieve mills mounted on the frame by means of damping struts and a vibration drive associated with them, characterized in that, in order to reduce dynamic loads, when the device is in operation, JQ If shock-absorbing racks are made in the form of hollow glasses, inside each of which there is a rod with springs, the racks are installed on the frame by means of curvilinear soles connected to the frame by bolted connection through spring washers, the frame being hinged at the upper ends of the rods. Fia.3 5-6 Editor I.Gorn Compiled by B. Levchayev Tehred M. Khodanich Proofreader S. Cherni Order 1606 Circulation 521 VShVDPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, g, Uzhgorod, st. Gagarin, 101 FI.5 Subscription