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УДК 631. 312
Karimova D.
Turdiyeva M., PhD Ismoilov M.
No 'monova X. Ahmadov F. student
RESEARCH ON ENSURING EFFECTIVE COMPACTION OF THE UNIVERSAL DEVICE ROLLER USED IN PRE-PLANTING TILLAGE
Annotation. The roller of the universal device used in the pre-planting treatment of the land, the roller of the universal device used in the pre-planting treatment of the soil should occupy a horizontal or upward position during the work process.
Keywords: universal device, roller, frame, pressure force, minimum weight force, traction force.
The roller of the universal device is hinged with its frame by means of a towing device, and during the work, it sinks into the soil to a certain depth. Its main task is to uniformly compact the layer processed by the universal device's arrow-shaped claws and milling cutter at the required level and along the entire surface. In order to achieve this, the depth of immersion of the roller into the soil and its uniformity are important considerations.
When the roller is connected to the frame according to the "a" scheme, the OO1 connecting them takes a horizontal position during the working process, when it is connected according to the "b" scheme, the tension is downwards relative to the horizontal position during the working process. ib works, and when "v" is connected according to the scheme, the tensioner works with an upward deviation from the horizontal position during operation.
Figure 1.1 shows the possible connection schemes of the winding with the frame of the device.
Figure 1.1. Schemes of connection of the universal device coil with its
frame.
Using the schemes presented in Figure 1.1, we determine the vertical compressive force exerted by the roller on the soil
Q = Nz = G + Psina = mg + Рsin«, (1.1)
here Qb - vertical compressive force exerted by the roller on the soil, N;
Nz - of the reaction force acting on the coil by the soil vertical organizer,
N;
G - gravity of the reel, N;
P - the pulling force exerted by the tow on the reel, N;
a - the tension connecting the reel to the frame relative to the horizon deviation angle, Н;
тг - the mass of the coil, кг;
g - free fall acceleration, м/с2.
In the expression (1.1), the sign "-" is placed when the tow is deviating from the horizontal position downwards, and the sign "+" is placed when it is deviating upward.
In the first case, i.e., when the tractor is working in a horizontal position, the traction force applied to the roller does not affect the pressure force exerted by it on the soil, and its gravity is fully used to compact the soil.
In the second case, i.e., the traction force exerted on the roller tends to raise it from the ground, even though the drag is working downwards from the horizontal position. Therefore, the pressure force of the roller on the soil is less than its weight, that is, in this case, the weight of the roller is not fully used to compact the soil. It should also be noted that the greater the angle of deviation of the tractor from the horizon, the lower the pressure force of the roller on the soil. Therefore, in this case, to compact the soil at the required level, a greater force of gravity is required than in the first case.
In the third case, the force of gravity presses the roller to the ground. As a result, the compressive force of the roller is greater than the force of its weight. Therefore, in this case, a minimum amount of gravity is required to compact the soil at the required level. This, in turn, leads to a decrease in material volume.
We change the expression (1.1) to the following form
here ^ - rolling coefficient of the roller;
Nx - of the reaction force acting on the coil by the soil horizontal organizer,
It is known that the reaction forces Nx and Nz acting on the coil during the work process are constantly changing due to the variability of the physical and mechanical properties of the soil. As can be seen from the expression (1.2), for this reason, when the tension connecting the roller with the frame deviates downward or upward relative to the horizon, the pressure force Qb of the roller on the soil remains variable, and as a result, the soil is unevenly compacted. This, in turn, has a negative effect on the quality and germination of seeds.
G According to the expression (1.2), when the pulley connecting the reel to the frame works in a horizontal position, the forces, Nx and Nz do not affect Qb that is, it has a constant value. As a result, the soil is compacted at the same level along the whole field, seeds are sown and germinated evenly.
Based on the above, laboratory-field experiments were carried out on the background treated at a depth of 18-20 cm with a chisel-cultivator equipped with a softener and arrow-shaped claws, and the position of the horizontal installation of the pulley connecting the reel to the frame the density and hardness of the soil in the 0-10 cm layer and their effect on the mean square deviations (and therefore uniformity) were studied. In the experiments, the tow truck was installed in 20° tilting and horizontal positions. This is achieved by moving the point O (Fig. 1.1) up and down.
N.
Summary:
In order to ensure uniform and effective compaction of the soil, the roller of the universal device used in tillage before planting must be horizontal or upward during the work process.
References:
1. Baymetov R.I., Tuxtakuziev A., Axmetov A.A. Obosnovanie tipa i parametrov mexanizma naveski universalnogo doposevnogo orudiya // Issle-dovaniya po optimizatsii mexanizirovannbix protsessov v xlopkovodstve. Sb. tr. /SAIME. -Tashkent, 1989. - Vbip.31. - S. 31-37.
2. Tuxtakuziev A., Abdulxaev X. Issledovanie ravnomernosti glubi-пы xoda rbixlitelya dlya predposevnoy obrabotki grebney // Mexanizatsiya i elektrifikatsiya selskogo xozyaystva. - Moskva, 2013. - №6. - S.4-6.
3. Tuxtakuziev A., Ibragimov A., Atamkulov A. Issledovanie ravno-mernosti glubinbi xoda borozdoreza seyalki dlya seva zernovbix v polivnom zemledelii // Texnika v selskom xozyaystve. - Moskva, 2014. - №5. - S.2-3.
4. To'xtaqo'ziyev A., Abdulxayev X, Karimova D.Investigation of steady movement of working bodies on depth of processing that connected with frame by means of parallelogram mechanism// Journal of Critical Reviews,may 2020 Scopus 7 (14), page 573-576. doi:10.31838/jcr.07.14.98
5. To'xtaqo'ziyev A., Karimova D., Sultonov Z. U., Ozodmirzaeva Sh., Abdunabiyeva F. Siyentifis-techniquye toensure thestable movementof working bodi ess onne stedbyt heramaand parallelogram mechanism sof soiltreatment machines // InnovativeTechnologisa. Methodisal research journal, Volume 2, Issuye 5 May, 2021. https: //it.asademiassiyense.org/index.php/it/artisle/viyew/69.
6. Каримова Д. Резултаты испытаний зубовой секции орудиya длya обработки гребней // Proceedings of the 2 nd International Scientific and Practical Conference scientific community: Interdisciplinary research Hamburg. Germany January, 2021. -№;40. -Б. 521-522.
