Design and Experiment of Transverse Axial Flow Corn Flexible Threshing Device

Li, Huabiao; Wang, Q.; Ma, Jie; Wang, Yanan; Yue, Dick K. P.; GENG, Duanyang

doi:10.35633/inmateh-69-43

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…Additionally, extending the header can increase its capacity, allowing for higher feeding speeds, while maintaining the stem-pulling roller speed at a relatively low level, reducing harvest losses and increasing harvesting efficiency. Existing loss reduction measures, such as adding cushioning devices or using flexible materials to reduce the force on the ears [28][29][30], improving the shape of the picking plate [31,32] and the structural parameters of the stem-pulling roller [33][34][35][36][37], and implementing stem-pulling roller gap adjustment, can reduce harvest losses to some extent. These measures are highly effective when applied to large corn harvesters, but when used in single-or double-row harvesters in narrow-row corn planting areas, they can significantly reduce harvesting efficiency.…”

Section: Discussionmentioning

confidence: 99%

Design and Experiment of a Harvesting Header for Wide–Narrow-Row Corn

Dong,

Wu,

Liu

et al. 2024

Applied Sciences

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Aiming to solve the problems of the large harvesting loss and low harvesting efficiency of wide- and narrow-row corn harvesting header in China, a method for the side installation of a header is proposed. A wide–narrow-row corn harvesting header with high working efficiency and low harvesting loss was designed. The collision energy balance equation of corn ears was established. The analysis shows that the kinetic energy change before and after the collision between the ear and the picking plate is the main cause of the shedding of and damage to corn kernels. Based on this, the main structural parameters of the corn harvesting header were designed. Based on the principle of Box–Behnken test, the response surface test was designed. The effects of the plant feeding speed, feeding angle, and rotation speed of a stem pulling roller on harvesting performance were analyzed. The best combination of working parameters was determined: The plant feeding speed was 1.08 m/s, the feeding angle was 52.46°, and the rotation speed of the stem pulling roller was 835.25 r/min. At this time, the grain damage rate was 1.09% and the grain loss rate was 0.14%. The corresponding parameters are verified by experiments. The results show that the grain damage rate was 1.12% and the grain loss rate was 0.14%. The optimization results are essentially consistent with the verification results, which meet the requirements of corn harvesting performance.

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Section: Discussionmentioning

confidence: 99%

Design and Experiment of a Harvesting Header for Wide–Narrow-Row Corn

Dong,

Wu,

Liu

et al. 2024

Applied Sciences

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“…If the diameter of the threshing rotor is too small, it is easy to block, and the separation area of the concave plate is reduced, but if the diameter of the rotor is too large, the threshing power consumption will increase [23]. According to the manual of agricultural machinery, the diameter of the root circle of the threshing rotor is generally greater than 300 mm, so the test bench selected 400 mm.…”

Section: Rotor Designmentioning

confidence: 99%

Design and Experiment of Flexible Threshing Device with Variable Stiffness for Corn

Niu,

Zha,

Yang

et al. 2024

Agriculture

Self Cite

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In order to solve the problem of the high damage rate of corn with a high moisture content in the Huanghuaihai region, according to the mechanical characteristics of corn in the Huanghuaihai region, we designed a flexible threshing device with a threshing rasp bar and variable stiffness spring as the buffer carrier, and the elements of the device were nail teeth and a flexible threshing rasp bar, which could be replaced freely. The experiment was based on the threshing rotor speed, threshing gap, and spring stiffness as the influencing factors, with the grain breakage rate and the unthreshed rate as an indicator of three-factor three-level experiments, and in October in Zibo through bench experiments, to determine the best parameter combinations. When the spring compression stiffness was 20.83 N/mm, the rotor speed was 375 r/min, and the gap of the concave plate was 45 mm, the grain breakage rate of the corn ear was 4.7%, and the unthreshed rate was 0.48%, which is in line with the relevant national standards.

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“…Impact damage to seeds has been the subject of much research due to reduced crop quality during harvesting, handling, and processing. Various test methods have been proposed to predict the crushing strength of corn kernels, including the compression method (Su et al, 2019a, 2019b, 2020), the drop method (Li et al, 2009), the pendulum method (Srivastava et al, 1976), and breakage sensibility (Bilanski, 1966). Many indexes and methods have been developed to determine corn kernel susceptibility to breakage.…”

Section: Introductionmentioning

confidence: 99%

Effects of cushion box and closed let‐down ladder usage on impact damage to corn kernel during handling

Shahbazi

2022

Food Science & Nutrition

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The main purpose of this study was to evaluate the effects of the cushion box and closed let‐down ladder usage in minimizing mechanical damage to corn kernels during free fall. Kernels from a single lot of cultivar KSC 705 were evaluated for percentage of breakage using three drop methods (free fall, with cushion box, and with closed let‐down ladder) at five different moisture contents (10%, 15%, 20%, 25%, and 30%), and three drop heights (5, 10, and 15 m). The results showed that the drop methods had a significant effect on the breakage sensibility of kernels. Sample kernels dropped without a ladder (free fall) had a significantly higher average percentage breakage of 13.80%. In the use of the cushion box, the average kernel breakage was calculated to be 11.41%, which was decreased by about 17% more than the free fall. Sample kernels dropped with the closed let‐down ladder had a lower average breakage of 7.26%, which showed that the closed let‐down ladder significantly helped to reduce mechanical damage to corn kernels by about 47% comparing free fall and by about 37% than the use of the cushion box. The amounts of kernel damage increased significantly with increasing drop height and decreasing moisture content, but the use of the cushion box and closed let‐down ladder systems somewhat reduced the adverse effect of the above factors. To minimize mechanical damage to kernels as they fall into the bin, a grain let‐down ladder should be installed in the bin so that it can receive kernels from the filling spout with minimum damage. Empirical models were developed for the dependency of damage to corn kernels due to the impact caused by free fall on the drop height and moisture content at different drop methods.

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Design and Experiment of Transverse Axial Flow Corn Flexible Threshing Device

Cited by 5 publications

References 18 publications

Design and Experiment of a Harvesting Header for Wide–Narrow-Row Corn

Design and Experiment of a Harvesting Header for Wide–Narrow-Row Corn

Design and Experiment of Flexible Threshing Device with Variable Stiffness for Corn

Effects of cushion box and closed let‐down ladder usage on impact damage to corn kernel during handling

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