RU2816152C1 - Vibrating separator of loose materials - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: proposed invention relates to devices for separation of loose materials, including for separation of grain mixture. Vibrating separator of loose materials comprises a bearing box, a hopper for loading loose material and feeding it to a sieve mill, trays for collection of separated fractions of material and two vibration exciters shifted to opposite ends of sieve mill. Vibration exciters are made in the form of three-phase two-pole synchronous electric motors, which rotors are made of magnetically hard material, installed in stator with unbalance due to loads. Three-phase stator windings are connected to the power supply source for the same direction of rotation for both electric motors.

EFFECT: higher reliability and performance criterions of separator.

1 cl, 1 dwg

Description

The invention relates to devices for separating bulk materials, including separating grain mixtures.

A known separator for bulk materials [1], adopted as a prototype, contains a supporting box, a hopper for loading bulk material and supplying it to separation elements (sieves) placed in a frame with sides (sieve mill), trays for collecting separated fractions of material and a vibration exciter with a drive of two crankshafts rotating in bearings installed in opposite ends of the box, from an electric motor that excites vibration of the sieve mill.

The disadvantage of this separator is that in order to ensure synchronous rotation of the crankshafts, both in the rotation frequency and in the angle of rotation of their cranks, a rather long chain drive is used between them, which, as a rule, has low wear resistance in conditions of increased dustiness, especially since it operates at high shaft speeds.

All this reduces the operational reliability of the separator.

The purpose of the invention is to increase reliability and thereby increase the performance of the separator.

The technical result is achieved due to the fact that in a vibration separator of bulk materials, containing a supporting box, a hopper for loading bulk material and supplying it to the sieve mill, trays for collecting separated fractions of material and two vibration exciters, shifted to opposite ends of the sieve mill, the vibration exciters are made in in the form of three-phase two-pole synchronous electric motors, the rotors of which are made of a magnetically hard material, installed in the stator with an imbalance due to weights, and the three-phase stator windings are connected to the power source in the same direction of rotation for both electric motors.

The essence of the invention is illustrated by the drawing (Figure 1).

The separator contains a supporting box 1, a hopper 2 for loading bulk material and supplying it to a sieve frame 5, spring-loaded with the help of springs 3 and 4, as well as trays 6 for collecting separated fractions of material. Vibration exciters 7 and 8 are installed at opposite ends of the sieve mill. They are made in the form of three-phase two-pole synchronous electric motors, the rotors 9 and 10 of which are made of magnetically hard material, installed in the stator with an imbalance due to weights 11 and 12. The three-phase stator windings are connected to the phases of the power source in the same direction of rotation for both electric motors.

The vibration separator of bulk materials operates as follows.

When three-phase voltage is applied to terminals C1, C2 and C3 of synchronous electric motors 7 and 8, a bipolar rotating magnetic field is formed in their stators, dragging the rotors with them, which also begin to rotate in the same direction for both electric motors. Due to the imbalance of the rotors, the sieve mill will oscillate in the vertical plane along a closed circular or elliptical trajectory so that its angle of inclination relative to the horizontal (due to the synchronism of the rotation of the rotors in frequency and angle of rotation) remains unchanged. Using a conveyor (not shown in the drawing), the separated material is fed into hopper 2 and from it enters the separation elements of the sieve mill. Due to the vibration of the separation elements along a closed path, the separated material moves along the screen mill in the direction from the hopper. In this case, their self-separation occurs (movement of smaller particles to the lower part of the layer of material). They first pass through the cells of the separation elements, which increase in size as they move away from the hopper, ending up in the corresponding trays.

Thus, by simplifying the kinematic diagram of the separator, reducing the hinge joints to a minimum and replacing the mechanical transmission connection between the vibrators, synchronizing their effect on the sieve mill, with an electrical connection, the problem of the invention is solved.

A source of information.

1. Patent RU No. 2796137 C1, cl. HOB 1/12 Separator of bulk materials / Petko V.G. (RU) and other applicant and patent holder Federal State Budgetary Educational Institution of Higher Education "Orenburg State Agrarian University" (RU). Application 2022130819, submitted 11/28/2022, publ. 05/17/2023 Bulletin. No. 14.

Claims (1)

A vibration separator for bulk materials containing a supporting box, a hopper for loading bulk material and supplying it to the sieve mill, trays for collecting separated fractions of material and two vibration exciters shifted to opposite ends of the sieve mill, characterized in that the vibration exciters are made in the form of three-phase two-pole synchronous electric motors , the rotors of which are made of a hard magnetic material, installed in the stator with an imbalance due to weights, and the three-phase stator windings are connected to the power source in the same direction of rotation for both electric motors.