Study of the process of grain pre-threshing by working bodies of a combine harvester header

Sheychenko, Victor; Dudnikov, Igor; Kuzmych, Alvian; Shevchuk, Misha; Shevchuk, V.; Pushka, Alexander; Hruban', Vasyl'; Tolstushko, Mykola; Tolstushko, Nataliya

doi:10.15587/1729-4061.2017.118276

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…However, it is not suitable for complex operating environment in hilly area. Tian et al [24,25] designed a differential threshing device to adjust the differential speed between a single drum and a multistage drum, which improves the effect of rice threshing.…”

Section: Introductionmentioning

confidence: 99%

Structure design and rice threshing performance of the variable-speed inertial pulley for simulating artificial threshing

Jing,

Tang,

Hao

et al. 2024

International Journal of Agricultural and Biological Engineering

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Due to the small models and compact structures, small harvesters have also caused problems such as poor threshing separation performance and large loss rates. In order to solve unstable cleaning effects of small harvesters when they facing different working conditions, this study selected rice plants in hilly areas for the experiment. Tensile breaking force of different parts of mature rice was tested, which revealed the fracture mechanism of each part under the combined force. Inertial threshing method was used to simulate artificial plate bin and design three kinds of non-circular pulley variable speed transmission threshing mechanism. With the help of transient inertia force, threshing force was compensated. This paper tested the harvesting performance of the variable speed threshing device with the help of the harvest performance test. Results show when facing the small rice planting area, the T/2 variable speed threshing device has better cleaning performance, and also the harvest loss rate of T/4 variable speed threshing device is the lowest. Compared with the constant speed threshing device, the impurity content rate of the variable speed threshing device is increased by 0.64% to 8.76%; the loss rate is reduced by 0.45% to 1.79%, which provides a basis for the optimization design of small combine harvester in hilly areas.

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Section: Introductionmentioning

confidence: 99%

Structure design and rice threshing performance of the variable-speed inertial pulley for simulating artificial threshing

Jing,

Tang,

Hao

et al. 2024

International Journal of Agricultural and Biological Engineering

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“…Питанням дослідження та обґрунтування швидкості руху матеріалу, вивчення фізичних явищ процесу обмолоту хлібної маси в робочому зазорі молотильних пристроїв приділялася значна увага в роботах багатьох авторів [1][2][3][4][5], але слід зауважити, що ці результати мають значні протиріччя й вимагають подальшого вивчення. У роботах [6][7][8][9][10][11][12][13] представлено ряд підходів до математичного моделювання процесу обмолоту та сепарації зерна в зернозбиральних комбайнах на основі використання експоненціальних функцій. Процес обмолоту та сепарації обмолоченого зерна розглядається як випадковий процес, коли зерно відривається від колосу під час кожного удару.…”

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Study of the threshing process of grain mass in the working gap of the drum deck

Aneliak,

Kuzmych,

Konoval

2023

MAAP

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Purpose. Determine the influence of the most important factors on the intensity of the threshing process of the grain mass in the working gap of the threshing device. Methods. Modeling of the technological process of threshing grain mass in a threshing device. The theoretical provisions of elementary mathematics and mechanics were used, and the movement of the grain mass in the working gap of the drum-deck, which is subjected to impulse influence from the bars of the threshing drum, was considered. Results. The regularities of the flow of the technological process of threshing the grain mass in the working gap of the drum-deck, due to such most influential factors as the speed of movement of the material and the impulse action of the bars from the side of the threshing drum, have been studied. Equations are obtained that characterize the influence of the most significant factors on the threshing process, such as the speed of the material and the magnitude of the forces acting on the material. Equations are obtained that establish the share and intensity of grain threshing in the working gap of the threshing device, depending on the angle of rotation of the drum. Conclusions. Six equations have been obtained that characterize the influence on the process of threshing the grain mass of the most significant factors, such as the speed of movement of the material and the magnitude of the forces acting on the material. The solution of these equations makes it possible, with the introduction of an additional condition, to determine the influence of the most significant factors on the intensity of the threshing process in the working gap of the threshing device. Keywords: threshing, grain mass, working gap of the threshing device, threshing drum.

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Substantiation of the Parameters of a Soil Tillage Machine Ripper

Syromyatnikov

2021

Engineering Technologies and Systems

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Introduction. Production of safe food requires the avoidance of using chemical means to bring weeds under control in cultivating crops. Existing tillage loosening and separating machine PRSM-5 Dokuchaevskaya optimizes the physical and mechanical state of the cultivated soil layer, while the weeds are carefully removed from the soil by combing out together with the whole weed root system and laid on the surface, where they dry up under the influence of climatic factors. During the operation of the tillage machine, about 30% of the total energy consumption is spent on the rotor drive. Therefore, this machine is not working satisfactorily in firm soils. Materials and Methods. The soil was considered as an elastic-plastic medium. The generalized Hookeʼs law model and a variant of the plastic flow theory were taken into account. To simplify the calculations, there was used the experimental study information on the position in space of the soil deformation surface. The intensity of stresses of polyplastic deformations of the soil layer was determined. For the numerical solution of the problem, the Ritz method was used. Results. In connection with the indicated disadvantages, the parameters of the rotor ripper are justified taking into account the reduction in energy consumption for its drive. As a result of solving the problem by the Ritz method, the geometric shape of the rotor ripper was determined. The energy performance of the section of the tillage machine was evaluated by the torque of the rotor drive of the loosening-separating device. The rotor drive torque was determined for rippers with flat, convex, and concave profiles and for the profile substantiated during the study. Discussion and Conclusion. The profile substantiated during the study provides the best conditions for transporting the soil at the initial moment of the rotor entry into the soil and the minimum energy consumption for its drive.

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Study of the process of grain pre-threshing by working bodies of a combine harvester header

Cited by 5 publications

References 5 publications

Structure design and rice threshing performance of the variable-speed inertial pulley for simulating artificial threshing

Structure design and rice threshing performance of the variable-speed inertial pulley for simulating artificial threshing

Study of the threshing process of grain mass in the working gap of the drum deck

Substantiation of the Parameters of a Soil Tillage Machine Ripper

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