Improving the Efficiency of Harvesting Sunflower Seed Crops

Stepanenko, S. P.; ANELIAK, Mykhailo; KUZMYCH, Alvian; KUSTOV, Serhii; LYSANIUK, Viktor

doi:10.35633/inmateh-67-34

Cited by 6 publications

(5 citation statements)

References 11 publications

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“…2). Expression (16) shows that the generalised force Q β is the algebraic sum of the moments of all active forces acting on a given dynamic system. Assuming that the angle α is small enough, the following is true: cosα ≈ 1, and sinα ≈ α.…”

Section: Methodsmentioning

confidence: 99%

Development of the theory of root crop head cleaner movement in the longitudinal-vertical plane mounted behind a wheeled tractor

Budzanivskyi

2023

Tehnìka ta energetika

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The relevance of developing analytical methods for studying the stability of root crop cleaners on tractors is determined by the need to improve the efficiency and quality of root crop head cleaning, as this affects the quality of the final product and its marketable properties. The research aims to increase the stability of the cleaner movement by constructing a mathematical model of its oscillatory motion in the longitudinal-vertical plane and its numerical solution to determine the influence of parameters in response to external disturbances. To achieve this goal, a new theory of the movement of a root crop head cleaner in the longitudinal-vertical plane, mounted behind a wheeled tractor, under the influence of the disturbing effect of irregularities in the longitudinal profile of the soil surface on the amplitude and phase frequency characteristics of its angular oscillations was developed. Using numerical calculations carried out on a personal computer, the conditions were found under which the stability of the cleaner’s movement in the specified plane will increase when the stiffness coefficient of the pneumatic tyres of the doubler wheels is 315 kN×m–1. This result is achieved when the pressure in the pneumatic wheel tyres is 135 kPa. As for the damping characteristics of the doubler wheel tyres, which are determined by the coefficient μ, it was found that when it changes from 350 N×s×m–1 to 1350 N×s×m–1, there is an invariance of the delay in the reaction of the cleaner to the disturbing effect when its frequencies change from 0 to 24 s–1. It was also found that the influence of the geometric dimensions of the cleaner is insignificant in the range of frequencies of oscillations of the ordinates of the longitudinal profile of soil surface irregularities from 0 to 24 s–1. This follows from the nature of changes in the obtained amplitude-frequency and phase-frequency characteristics. The methodology for constructing a mathematical model of the plane-parallel oscillatory motion of the cleaner can be used in similar analytical studies of other agricultural machines mounted on a wheeled aggregating tractor

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Section: Methodsmentioning

confidence: 99%

Development of the theory of root crop head cleaner movement in the longitudinal-vertical plane mounted behind a wheeled tractor

Budzanivskyi

2023

Tehnìka ta energetika

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“…Як показав аналіз літературних публікацій [20][21][22][23][24][25] 1) Зернівки в процесі завантаження є «великими» та «малими» твердими тілами. Під «великими» розуміються насінини, геометричні розміри яких можна виміряти в 4-10 міліметрів, під «малими» -насінини, розміри яких вимірюються в межах 1-3 мікромети.…”

Section: вібрації в техніці та технологіяхunclassified

“…Існуючі способи підвищення ефективності функціонування сепараторів [17][18] спрямовані на конструкційне удосконалення повітрянорозділяючих систем, шляхом застосування багатоструменевого, багаторівневого введення матеріалу, попереднього (перед введенням) розшаруванням матеріалу повітрям або вібраціями, застосуванням електричного поля, використання багатоканального пристрою [19]. Однак, такі прийоми, значно ускладнюють конструкції машин для сепарування зернових матеріалів та не вирішують проблеми суттєвого збільшення продуктивності зерносепаруючого обладнання, а тільки збільшують енергетичні затрати [20]. Розпушування зернового матеріалу в псевдозрідженому шарі [21] використовується для поліпшення введення зернового матеріалу на віброрешето діючих установок але самостійне його використання, як пневмосепаруючої установки обмежено шириною вертикального каналу [22].…”

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Mathematical Modeling of the Process of Movement of Grain Material on the Surface of a Sieve of a Vibrating Pneumatic Pulse Separator

Stepanenko,

Volyk,

Kotov

et al. 2023

Vibrations in Engineering and Technology

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The results of a theoretical study of the movement of grain material on the surface of a unfailing sieve of a vibrating pulse separator are presented. The paper presents the power and kinematic model, geometric characteristics of the surface of the sieve of a vibrating pneumatic pulse separator in static, and kinematic processing parameters. Calculations based on the proposed model allow determining the forces of movement, velocity, and acceleration of seeds in the grain medium under the combined action of vibrations and pneumatic pulse flow. The following conclusions were drawn as a result of the research and analysis of the generated forces according to the developed mathematical model: the greatest influence on the process of moving grain material, both in the horizontal and vertical directions, is exerted by the force of impulse (pulsation) of the air flow, the pressure force above the overlying layers of grain material (for seeds in the middle part and on the surface of the sieve without a dip), friction forces, seed weight, and the Archimedean force; in order to intensify the process of fractionation of the grain medium, increase the productivity of the vibrating pneumatic pulse separator, it is necessary to increase the force of the pulsating air flow, the inertia of the oscillatory motion, friction and lateral pressure on the seeds in the grain medium. To solve this problem, it is necessary to optimize the amplitudes and frequencies of oscillations of the unfailing sieve of the vibrating pneumatic pulse separator. The analysis of the mathematical model showed the feasibility of using a vibrating unfailing sieve surface with the simultaneous interaction of the injecting pulsating air flow under the sieve to separate grain material by seed density. It has been established that in order to intensify the separation of grain material into fractions, while increasing the productivity of the technical means, it is necessary to increase the force of the pulsating air flow, friction forces, and lateral pressure. The dynamic model of the movement of grain material displacement and recombination is scientifically substantiated and technological recommendations for the separation of grain material into fractions by seed density using the proposed technical means of a vibrating pneumatic pulse separator with the use of a patented method of its separation are developed.

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“…The objective is to implement an entirely mechanized sunflower-harvesting process in Xinjiang and to reduce high manpower costs and severe seed loss. In this paper, we propose a kind of sunflower cutting table that reduces the collision between the cutting table and sunflower plants and the intake of stalks and leaves during the harvesting process, to avoid the excessive vibration of the implement, which results in clogging caused by the dropping of seeds and entry of impurities into the cutting table or threshing unit [17,18]. However, the specific objectives of this study were (1) to design a sunflower cutter unit with low seed loss; (2) to design the structural parameters of key components; (3) to use the finite element software Adams (Version: 2020) to establish a rigid-flexible coupling model sunflower cutting table to simulate the harvesting process for different planting modes; (4) to verify the feasibility of the cutting table through field tests and find out the optimum operating parameters.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Analysis of a Sunflower Cutting Table Based on the Principle of Manual Disk Pick-Up

Li,

Gao,

Chen

et al. 2024

Agriculture

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To solve the problems associated with the poor harvesting ability of existing sunflower harvester cutting tables, and high seed drop rates, we designed a sunflower cutting table that can greatly improve the operational performance of sunflower combine harvesters. In this paper, we introduce the structure and principle of the whole machine and select the key parameters of the cutting table with the goal of adapting to a variety of planting modes in Xinjiang, China. Since the harvesting of sunflower in the wrong row easily causes the sunflower stalks to break, ADAMS (Version: 2020) simulation experiments were carried out to investigate the effects of the forward speed of the machine, the height of the sunflower insertion disk, and the angle of inclination of the harvest divider on the offset angle of the sunflower. With the goal of reducing the offset angle of the stalks in the forward direction of the harvest divider and reducing the size of the cutting table, the harvest divider inclination angle was chosen to be 45°; by using Design-Expert V13.0.15 software, a three-factor, three-level field test was carried out to determine the optimal parameter combinations that resulted in the minimum seed loss rate and the maximum success rate of the disk picking. Moreover, a validation test was conducted. The results show that when the forward speed is set to 0.62 m/s, the lifting speed of the pick-up disk device is set to 0.42 m/s, and the height of the inserted disk is set to 1000 mm, the relative errors between the theoretical values of the disk-picking success rate of the cutting table and the seed loss rate and the field test values are 6.5% and 1.3%, respectively. The results of the present study can provide a reference for improving the performance of sunflower harvester cutting tables and for the mechanical harvesting of inserted disk sunflowers.

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Improving the Efficiency of Harvesting Sunflower Seed Crops

Cited by 6 publications

References 11 publications

Development of the theory of root crop head cleaner movement in the longitudinal-vertical plane mounted behind a wheeled tractor

Development of the theory of root crop head cleaner movement in the longitudinal-vertical plane mounted behind a wheeled tractor

Mathematical Modeling of the Process of Movement of Grain Material on the Surface of a Sieve of a Vibrating Pneumatic Pulse Separator

Design and Performance Analysis of a Sunflower Cutting Table Based on the Principle of Manual Disk Pick-Up

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