Accurate Classification of Grain and Seeds by Particle Length in Grain Cleaning Lines
A cylindrical trieur, also known as an indent cylinder or indent cylinder separator, is specialized equipment for separating grain and seeds by particle length. Unlike air separators or sieve machines, this type of equipment does not use differences in material weight or density — separation occurs exclusively on the basis of grain fraction.
Cylindrical trieur machines occupy a key place in grain cleaning technological lines: they are installed after preliminary cleaning and before final sorting or polishing stages. The main task of the machine is to remove short and long impurities, broken grains, and foreign inclusions that cannot be separated using screens or aspiration.
The use of cylindrical tribers is relevant in the processing of wheat, barley, rice, sunflower seeds, and a wide range of other grain and oilseed crops. High sorting accuracy ensures the uniformity of the finished product and protects subsequent technological equipment from unwanted fractions.
The construction of a cylindrical trieur is based on a horizontally positioned rotating cylinder, the internal surface of which is equipped with precisely formed indentations—cells (indents). The geometry of each indent is calculated for specific dimensions of the crop being processed: this is precisely what determines the selectivity of grain particle capture during operation.
The regulation of the cylinder's rotation frequency and its angle of inclination allows operators to precisely adjust the separation process for various types of raw materials and required quality indicators. A drive with a frequency-controlled converter (inverter) ensures stable and smooth rotation, eliminating jerks and vibrations that could disrupt the accuracy of sorting.
System performance scales through the arrangement of multiple cylinders in a single machine or the combination of several units into multi-stage lines. This approach makes it possible to solve complex multi-fraction separation tasks without compromising accuracy at each stage.
High cell density on the working surface of the cylinder directly affects the productivity and accuracy of sorting. Industrial systems allow the use of cylindrical inserts with various indent geometries depending on the characteristics of the material being processed, which makes the equipment a universal grain cleaning tool.
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