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

Materials and methods. 
The research used theoretical mechanics, mathematical statistics, 

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№3/2021 year. 
Technical science and innovation
240 
mathematical planning and optimization of experiments, scanning of water-sensitive paper or 
Kromekote® card, and systematic special "DepositScan" program to quickly estimate the 
individual size, distribution, total number and density of droplets or droplets. documents
(Own DSt 3202: 2017) were used [11, 12, 13].
 
In order to evaluate the effectiveness of high-dispersion spraying technology, the 
experimental spraying unit equipped with advanced correctors was tested in field conditions at 
typical fields and optimal agrotechnical terms for the agrotechnical evaluation of defoliation 
spraying machines. 
An overview of the experimental spraying unit and the sprayer, the main elements of the 
sprayer are given in Figure 1 [14, 15]. 
а)
b)
v)
Figure 1. General view of the experimental spraying unit (a), general view of the 
sprayer (b), main elements of the sprayer (v) 
1- fan; 2- speakers; 3- rectifier; 4- sheath; 5-current expander; 6- conical turbulizer; 7- 
rubber sealant; 8-sided disc drive; 9- central tube 
 
A working fluid dispersing device consisting of a central tube mounted along the center 
of the housing with a discharge chamber and an outlet channel at the bottom, a controlled conical 
flow expander. The device is additionally equipped with a conical interchangeable turbulizer 
with a large number of holes, the channels of which are made at an angle to the axis of symmetry 
of the turbulizer. The outlet channel is made in the form of a ring hole, with the presence of a 
disc holder, which is made in the form of a single block with a central tube and a conical flow 
expander connected to the housing by a threaded connection.
 
The cultivated area must be flat, used in previous years, prepared in accordance with the 
agreed agro-instructions for the district, and the tested machine must meet the agro-technical 
requirements. The agro-technical requirements of the spraying unit tested in terms of density of 
plant distribution and species composition in the land area were selected accordingly. 
The following test schemes were adopted when determining the performance of sprayers in the 
processing area: 
- number of repetitions (cuts in the direction of movement) - 3, the intervals between them 
should not exceed 30-40 m; 
- the number of calculated cotton stalks in each sheath was selected depending on the coverage 
width of the spraying device; 
- it was ensured that the distance between the calculated stems in each crop was equal to or less 
than the width of the crop type row spacing. 

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