Grain pre-cleaner BSH-200

Universal grain cleaning separator model BSH-200 The universal grain cleaning separator model BSH-200 is designed, thanks to numerous settings, for both primary cleaning (elevator mode) and final cleaning (mill mode) of ears (wheat, rye, oats, etc.), cereals and legumes, industrial and oilseed crops, and grass seeds. It handles materials with geometric properties that differ from light and grainy characteristics using airflow and sieves, ensuring that the impurity content in the cleaned grain meets the standards specified in regulatory documents for operations in elevators, mills, grain processing plants, feed factories, and other regulated facilities.

+ For cleaning crops other than wheat, productivity is reduced as follows:

• For rye and corn – up to 90%;
• For millet and barley – up to 80%;
• For buckwheat and oats – up to 70%;
• For sunflowers – up to 50% of the nominal capacity.

+ Distinctive features of the BSH-200 compared to similar models according to the technological scheme

• The ability to adjust the inclination angles of the upper and lower sieves allows for optimal calibration of the separator depending on the cleaning tasks (elevator or mill mode), the type of grain, and its condition (clogging and moisture).
• Presence of inspection hatches on the side walls and roof of the body for adjusting the feed counterweights and visually monitoring the grain cleaning process.
• Optimal ratio of the grid cells to the sieve cleaner (rubber balls) size for more effective cleaning of the sieves from stuck particles.
• Fast sieve replacement possible within no more than 30 minutes when switching from one crop to another, including cleaning the machine body without removing the cleaning brushes from the machine.
• Presence of quickly removable hatches on the side walls of the body and a separation frame to allow access during machine cleaning and maintenance.
• The ability to reposition the tray for large waste discharge to the left or right side, and the option to switch the body drive electric motor to the left or right side, allowing the separator to be adapted to the specific features of a given space, especially during the modernization of existing lines.
• Equipped with a special feeder at the equipment inlet, which ensures the product flow is evenly distributed across the sieve inlet width, eliminating the need to use a previous hopper.
• Simple installation of the separator directly on site.

+ Device and operation

The grain cleaning separator BSH-200 consists of the following components: frame, body with sieve frames, feed system, and pneumatic channel.

The body is suspended from the frame on flexible suspension mounts. The sieve frames are inserted into the body along guides attached to the side walls of the body and secured in place with screws. Meshes are mounted on these frames and fastened with rivets to individual frames.

The separator’s design allows for adjustment of the sieve frames’ inclination angles: the upper frame from 4° to 7°, and the lower frame from 8° to 10°.

Large installation angles increase the speed of grain movement through the sieves and ensure higher productivity. Smaller installation angles, of course, reduce speed and productivity but increase the likelihood that particles pass through the holes, thereby improving impurity separation efficiency. Additionally, smaller installation angles allow for more effective cleaning of small-grain and oilseed crops (rapeseed, mustard, sunflowers, soybeans).

The sieve frames are divided by longitudinal and transverse partitions into cells containing rubber balls designed to clean the sieves of stuck particles.

The separator body is powered by an electric motor via a V-belt drive. The drive motor is mounted on brackets on the left side of the body (upon customer request, the motor can be installed on the right side). The belts are tensioned by moving the lower motor plate along grooves using tensioning screws.

First, the grain heap flows by gravity into the feeder, where it is distributed across the entire width of the machine and preliminarily cleaned by an airflow to remove light impurities.

At the top, in the front part of the body, there is a receiving pipe that serves to feed the sorted product from the feeder into the body.

The separator body performs circular motions, which cause the product to move across the sieve and be sorted.

Large impurities are removed from the separator through the tray, while the grain mixture with small impurities passes through the sorting sieve and enters the lower sieve frame.

Small impurities sifted through the seed sieve fall to the bottom of the separator and are then removed from the machine through the tray.

Grains cleaned on the sieves from large and small impurities enter the inlet pipe of the pneumatic channel.

In the separator's pneumatic channel, the grains are further cooled by a secondary air flow, thereby further cleaning them from light impurities.