Analysis of corn ears movement within the threshing crescent using high-speed recording method

Steponavičius, Dainius; Kemzūraitė, Aurelija; Kiniulis, Valdas; Zokaitis, Karolis

doi:10.21595/jme.2017.19457

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…Clarification of previously established intervals of variation of the experiment factors was carried out on two qualitative indicators: the first of which is the amount of grain remaining on the cobs after threshing, the second is the amount of free grain in the threshed cobs [8][9][10][11].…”

Section: Fig 2 Results Of the Experimental Study Of Axial-rotary Thre...mentioning

confidence: 99%

Study of seed corn threshing process

Bakharev

Pastukhov

Volvak

et al. 2020

19th International Scientific Conference Engineering for Rural Development Proceedings

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A high yield of grain and green mass of corn can be obtained only when using the seeds of the first generation of zoned hybrids, which are threshed in the conditions of processing enterprises after pre-drying the cobs to a humidity of 12…18 %. At this humidity, the strength of the shell of corn grains is maximal and the connection of the grain with the rod is weakened, which allows for threshing with minimal damage to the grain. An experimental design of an axial-rotary threshing device, which rotor is equipped with multi-helical spiral winding of variable height, is developed. The winding height decreases from the entrance to the threshing chamber to the exit from it. Rotor fully covered pneumatic-adaptive studded deck is installed so that the gap between the rotor shaft and the independent movable pins decreases from the input to the output. All pins are pressed against the deck by means of rubber pneumatic bags with an internal overpressure. In addition, the threshing chamber has the ability to change its spatial position relative to the horizon. These dimensional characteristics are justified foe a stationary axial-rotary threshing device with a productivity of up to 4.5 t•h -1 . As the result of experimental studies, the following rational intervals of values of the modes of operation of the threshing device were established: the rotor speed 150…170 min -1 , the angle of inclination of the threshing chamber 10…14º, the force of pressing the movable pins to the cobs 35…55 N, feed 0.8…1.1 kg•s -1 . As a result, the productivity of the axial-rotary threshing device is in the range 2.88…3.96 t•h -1 and the energy intensity of the threshing process is 0.5…0.7 kWh•t -1 , grain on the cob after threshing is less than 1.5 %, free grain in threshed corn cobs 1.16 %.

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Section: Fig 2 Results Of the Experimental Study Of Axial-rotary Thre...mentioning

confidence: 99%

Study of seed corn threshing process

Bakharev

Pastukhov

Volvak

et al. 2020

19th International Scientific Conference Engineering for Rural Development Proceedings

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“…Saeng-ong P. et al [57] investigated the effects of the guide vane inclination of an axial shelling unit on the corn shelling performance, suggesting that the loss from the shelling unit tended to decrease, the power requirements and specific energy consumption tended to increase linearly, and the grain breakage difference was insignificant when the angle of the guide vane increased. Steponavičius D. et al [58] established the movement of corn ears within the threshing crescent between the cylinder and the concave using a high-speed recording method. The tangential threshing unit was adopted in the experimental trials.…”

Section: Parameter Optimization Of Threshing Machinementioning

confidence: 99%

Low-Damage Corn Threshing Technology and Corn Threshing Devices: A Review of Recent Developments

Zhang

et al. 2023

Agriculture

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Corn is a crucial crop and has a vital application value in many aspects of our lives. Mechanical grain harvesting is the developing direction of corn harvesting technology, with corn threshing as its most imperative procedure. The quality of the threshing device of the corn harvester has a major influence on its damage rate, loss rate, and other parameters. Therefore, it is of great significance to effectively lower the damage rate in the process of corn threshing. This review presents the research progress and the application status of corn threshing technology and corn threshing machinery. The conclusions and suggestions on low-damage corn threshing technology and corn threshing machinery are summarized to provide a reference for the reduction in the damage rate of mechanical grain harvesting and promote the development of mechanical grain harvesting technology.

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“…Bumbar et al [30] established that the quality of threshing associated with the reduction of grain damage can be achieved by setting the tangential threshing cylinder rotation speed to 400-500 rpm, or its peripheral velocity to 17-21 m s −1 . When threshing moist ears, the peripheral velocity of the threshing cylinder must not exceed 15 m s −1 [7,33].…”

Section: Introductionmentioning

confidence: 99%

Shape Optimization of Concave Crossbars to Increase Threshing Performance of Moist Corn Ears

et al. 2023

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Harvesting of high-moisture corn ears poses a challenge due to the high level of grain damage. In the present study, a series of concaves adapted to moist corn ears threshing was developed and evaluated. The key improvements include a concave arc shape and oblique crossbars to reduce corn grain damage and threshing losses. Results show that the geometrical shape of the concave arc and its crossbars have a significant influence on the grain detachment from the ears, grain separation through the concave, and grain damage during the threshing process of moist ears of corn. Studies show that replacing the concave rounded crossbars with oblique ones can increase threshing performance of moist corn ears. A concave with an Archimedes’ spiral arc and oblique concave crossbars is an effective approach to improve corn grain quality and reduce harvest losses due to grain damage. We identify the optimal design for threshing corn ears as an experimental concave with an Archimedes’ spiral arc of 8 mm height, with 19 mm wide crossbars of the concave with an oblique working plane (tilt angle 25°). This design achieves minimal threshing grain losses (0.03%) when threshing moist ears (grain moisture content ~35%), and damaged grain in the threshing apparatus does not exceed the permissible limit of 3% at an ear feed rate of 16.8 kg s−1.

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Analysis of corn ears movement within the threshing crescent using high-speed recording method

Cited by 8 publications

References 4 publications

Study of seed corn threshing process

Study of seed corn threshing process

Low-Damage Corn Threshing Technology and Corn Threshing Devices: A Review of Recent Developments

Shape Optimization of Concave Crossbars to Increase Threshing Performance of Moist Corn Ears

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