Horizontal intensive grain scourer R3-BGO-8 is designed for dry cleaning of grain surface from dust, partial removal of bran covering, beard and germ at the milling industry enterprises.

Machine is produced in accordance with third category of GOST-15150, climate version “U” for internal market and export to temperate countries.

Structure and Functioning

The machine consists of body 1, rotor 2 with beaters 9, screen or abrasive cylinder 3, receiver 4, feeder 5, funnel 6, aspiration duct 7, protection construction 8, aspiration channel 13, tension screw 11, supporting bearings 12 (fig.1, 2).

Grain is supplied to the machine through receiver 4, where it is uniformly distributed and cleaned from metal foreign matters. Grain supplied to the feeder 5 from receiver 4 is captured by rotor 2 beaters 9, which throw grain around the screen (abrasive) cylinder 3.

Intensive grain cleaning is occurred due to:

a) friction between grains;

b) friction between grain and beaters;

c) friction between grain and screen (abrasive) cylinder.

Such processing provides:

a) decontamination of grain surface;

b) partial removal of bran covering, beard and germ;

c) crushing of earth-balls and their removal;

d) crushing and removal of empty and damaged by insects grain.

In machines with screen cylinder light impurities are removed through the mesh and discharged from the machine by funnels 6. Cleaned grain is removed through outlet nozzle, and contaminated air – through aspiration duct 7. In machines with abrasive cylinder cleaned grain with light impurities is removed through outlet nozzle, and contaminated air – through aspiration duct 7. Further grain is supplied to the aspiration channel 13, where it is additionally cleaned from light impurities.

Rotation of the rotor is carried out by drive through the V-belt transmission. Standard 11 kW electric motors with foot mounting are applied for the drive. Tension of V-belts is carried out by tension screws 11. Machine operating element is a horizontal rotor 2, which consists of hollow shaft with welded trunnions, and beaters 9 with buckets, which are welded at the 45˚ angle.

Attention! If it is necessary to replace one beater 9, the opposite beater also must be replaced. If possible, it is recommended to replace the complete set. After the replacement of beaters 9, rotor 2 must be dynamically balanced.

Screen cylinder 3 consists of two parts connected in a horizontal plane. Cylinder is attached to the feeder and inner wall of the machine body. Abrasive cylinder 3 consists of two parts connected together by flanges and baffles in the machine body. Cylinder is attached to feeder and inner wall of the machine body with clamps. For uniform wear of the screen (abrasive) cylinder surface it is recommended to rotate the cylinder by 180˚ during operation.

Cylinder abrasive surface is made of the mixture with following composition:

- synthetic corundum abrasive grit in accordance with GOST 3647-71 - 69... .76%;

- caustic magnesite powder in accordance with GOST 1216-41 - 14... .17%;

- technical magnesium chloride in accordance with GOST 7759-73 or flaked bishofit - 10... .14%.

In case of splitting abrasive surface may be repaired:

- blow splits on abrasive surface with compressed air;

- fill all existing splits with prepared mixture;

- hold filled parts in a dry, warm room at a temperature min. 30°C above zero and relative humidity 55... .70% for 3 days;

- after termination check the quality of repair, in case of splits detection repeat the fill.

If the abrasive surface is significantly worn that increases broken grain content (broken grain content max. 1%) and ash grain content (reduction of grain ash content after a single pass through the machine within 0,04... .0,06% - in the machine with abrasive cylinder) above allowed, it is necessary to replace the abrasive cylinder.