Вплив силової дії електричного поля коронного розряду на показники сипкості насіння пшениці

Анотація

influence of the power action of the electric field of the corona discharge on the indicators of flowability of wheat seeds

Y. Berlinec

In the system of post-harvesting and pre-planting preparation, transportation vehicles occupy an important place. The main cause of injury to the grain during the movement is the mechanical interaction of individual grains with the edges of the working bodies of transporting means.

The possibility of using the forces of electric nature acting on grains in the field of corona discharge, for the transport of seeds of agricultural crops by a conveyor belt was established. However, in order to create and efficiently use the transport medium using the corona discharge electric field forces, it is necessary to investigate the effect of the forces of the electric field of the corona discharge on the physico-mechanical properties of the seed material, namely on the parameters of the creep.

The physical and mechanical properties of grain are of great importance for the choice of technological process and machine design. An important physicochemical property of the seed mass, which directly affects the level of its mechanical damage, is siphonism.

The purpose of the study is to determine the effect of the force action of the electric field of the crown discharge on the parameters of the grain yield of the wheat seeds.

To study the effect of the electric force on the crown discharge electric field on the physical and mechanical properties of seeds of agricultural crops, a developed method based on the use of the tribometer was used.

The results of the experiment are used to determine the dependence of the boundary tangential stress on the normal stress in the thickness of the seed medium with the force effect of the corona discharge field.

With increasing voltage of the power source and reducing the thickness of the layer of wheat, its initial displacement resistance increases. Within the voltage of the power supply from 20 to 30 kV and the change in the thickness of the layer from 0.042 to 0.028 m, the initial resistance of the shift of the seed weight of the wheat varies from 72.7 N·m^-2 to 164.4 N·m^-2.

Conclusions and perspectives. In the field of corona discharge, the physical and mechanical properties of seed crops of agricultural crops change: the angle of internal friction and the initial displacement resistance increase.

It was established that when changing the voltage of the power supply of the electrode system from 20 kV to 30 kV and the thickness of the seed layer from 0,028 to 0,042 m, the increase in the angle of internal friction of the seed mass of wheat is in the range from 1,26 to 1,47 times. The greatest value of the 34 ° 9 'angle of internal friction of wheat seeds reaches at a voltage of 26 kV and a thickness of the seed layer of 0.028 m.

It has been established that when changing the voltage of the power supply of the electrode system from 20 kV to 30 kV and the thickness of the seed layer from 0,028 to 0,042 m, the initial resistance of the shift of seed mass of the seed increases in the range from 2.36 to 5.34 times. The greatest value of the initial displacement resistance is 164.4 N·m^-2 seed mass of wheat at a voltage of 30 kV and a thickness of the seed layer of 0.028 m.