Education of the republic of uzbekistan tashkent state technical university named after islam karimov

Figure 1. Schematic diagram of cleaner of seeds of cereal and leguminous crops: 
1 – loading hopper; 2 – mechanism for adjusting the seed feed rate; 3 - pitched board; 
4 - mechanism for changing air flow rate; 5 - air duct; 6 - fan, 7 - receiving hopper; 8 - frame; 
9 - basis; 10 - electric motor; 11 - clutch. 
 
To test the 
functionality
of the proposed device, an experimental sample was made. A 
general view of an experimental sample of the proposed device for cleaning seeds of cereal and 
leguminous crops from large and small impurities and weed seeds using an air flow by 
separating them into fraction is shown in the Figure 2. 

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№3/2021 year. 
Technical science and innovation
254 
An experimental model of a universal device for cleaning seeds of agricultural crops 
consists of a loading hopper 1, a device for adjusting the rate of seed supply 2, a pitched board 3, 
an air channel 4, a fan 5, a mechanism for changing the speed of an air flow 6, a receiving 
hopper 7, a frame 8, basis 9, electric motor 10 and clutch 11. 
a) 
b) 
Figure 2. General view of an experimental sample of the proposed device: 
a) front view; b) side view; 1 – loading hopper; 2 – device for regulating the rate of seed supply; 
3 – pitched board; 4 – air channel; 5 – fan; 6 – mechanism for changing the air flow rate; 
7 – receiving hopper; 8 – frame; 9 – basis; 10 - electric motor; 11 – clutch. 
 
The experimental studies by cleaning wheat and mung bean seeds from various 
impurities and weed seeds were carried out on an experimental sample of the proposed device. 
To assess the technological process of the device, the efficiency of cleaning seeds of agricultural 
crops from various impurities and weed seeds was taken. The data obtained were processed on a 
modern computer according to the existing program using the method of mathematical statistics 
[8, 9]. The table shows the results of experimental studies on the purification of wheat and mung 
bean seeds from various impurities and weed seeds on the proposed device [11]. 
Table 1 
Results of experimental studies on cleaning wheat seeds and mung bean from various impurities 
and weed seeds 
№ 
Name of 
seeds 
Efficiency of 
cleaning from 
various 
impurities,% 
σ, % 
V, % 
Efficiency of 
cleaning seeds 
from weeds,% 
σ, % 
V, % 
1 
Wheat 
98,0 
0,82 
0,83 
96,0 
0,82 
0,85 
2 
Mung bean 
99,5 
0,58 
0,58 
98,0 
0,82 
0,83 
As follows from the data in the table, if with a standard deviation σ = 0.82% and a 
coefficient of variation V = 0.83%, the efficiency of cleaning wheat seeds from various 
impurities was 98.0%, then with σ = 0.82% and V = 0.85%, the efficiency of cleaning them from 
weed seeds was 96.0%. The same pattern was observed when cleaning mung bean seeds, i.e. 
with a standard deviation σ = 0.58% and a coefficient of variation V = 0.58%, the efficiency of 
cleaning from various impurities was 99.5%, then with σ = 0.82% and V = 0.83%, the efficiency 
of cleaning from seeds of weeds amounted to 98.0%. 

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