Optimization Design of a Pneumatic Wheat-Shooting Device Based on Numerical Simulation and Field Test in Rice–Wheat Rotation Areas

Wang, Chao; Li, Hongwen; He, Jin; Wang, Qingjie; Lu, Caiyun; Yang, Huiling

doi:10.3390/agriculture12010056

Cited by 10 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Th matic wheat-shooting device had a faster and more stable airflow field after the o tion. Results of the field test showed that the optimized pneumatic wheat-shootin had about 68% higher seeding depth than the initial device [10]. Yazgi et al evaluated seed trajectories in different seed tubes.…”

Section: Laboratory Testsmentioning

confidence: 99%

Design and Experiment of a Helicoidal Seed Tube to Improve Seed Distribution Uniformity of Seed Drills

2022

View full text Add to dashboard Cite

In a conventional seed drill, the flow of seeds into the planting bed is usually disrupted and irregular, which contributes to poor seed spacing uniformity. The seed tube of the seed drill may be one of the reasons for disrupted and irregular seed flow. A seed drill, in principle, has to deposit seeds into the ground at a uniform spacing to avoid nutrient competition for optimum yield. This study was inspired to develop a novel helicoidal seed tube that regulates the flow of seeds in a seed tube while being dispensed by the seed drill into the ground. The helicoidal tube was designed to fit the end of a conventional delivery tube of a seed drill. It works by allowing the falling seeds to move through the helix causing a frictional reaction, thereby regulating the velocity of the falling seeds. The developed helicoidal seed tube was tested under laboratory conditions at three heights of the helix (100, 150, and 200 mm) and four pitch sizes (28, 32, 36, and 40 mm). As a result of the laboratory tests, the optimum values for the helix height and pitch size were determined as 200 mm and 36 mm, respectively. The performance of the helicoidal seed tube (helix height of 200 mm and pitch size of 36 mm) was compared with the conventional (hollow) seed tube under laboratory and field conditions. Trials were carried out at a seeding rate of 200 kg/ha and a forward speed of 1 m/s for both wheat and barley seeds. Field trials showed that the coefficients of variation of seed spacing of the conventional seed tube decreased from 118.4% and 139.5% to 77.2% and 70.6% for wheat and barley sowing, respectively, when the helicoidal seed tube was used. Overall, the use of helicoidal seed tube provided a more equal growing area for each plant due to its lower coefficient of variation.

show abstract

Section: Laboratory Testsmentioning

confidence: 99%

Design and Experiment of a Helicoidal Seed Tube to Improve Seed Distribution Uniformity of Seed Drills

2022

View full text Add to dashboard Cite

show abstract

“…(Kang et al, 2015) optimized the original belt-type seed guide device through bench tests and improved its seeding quality. (Wang et al, 2020 a) designed a pneumatic wheat precision seed casting device. Through fluent simulation analysis to determine the key component parameters, and the test-bad shows the device can achieve accurate and stable single seed sowing.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization Test of High-Speed Seed Guide Device With Conical Spiral Airflow

Zhang,

Zhu,

Wang

et al. 2024

Eng. Agríc.

View full text Add to dashboard Cite

During high-speed seeding operations, collisions between seeds and seed guide tubes are very significant, resulting in poor seed spacing uniformity. To solve this problem, a highspeed seed guide device with conical spiral airflow was designed, which can use highspeed positive pressure airflow to move seeds smoothly. To improve the uniformity of the airflow field in the device, a single-factor test was carried out to determine the reasonable range of each factor. Then, the four-factor and five-level central composite test was carried out. The four main factors were screw pitch, cone angle, width of gap, and angle of air-tube, and the evaluation index was the mean variance of airflow velocity. The test results showed that the optimal parameters of the high-speed seed guide device with conical spiral airflow were a screw pitch of 24.98 mm, cone angle of 7.47/55, width of gap of 5.31 mm, and angle of air-tube of 25.09°. The verification test showed that the relative error between the verification test value and the predicted value was less than 5%, indicating that the model had high reliability. This research can provide references for the research of highspeed seed guide technology and the innovative design of seed guide devices.

show abstract

“…On this basis, by analyzing the accelerating process of wheat seeds inside the seed discharger and the seed casting process, the seeding performance of the device was investigated, to obtain the factors that affect the wheat seeding effect [8]. Wang et al [9][10][11] proposed a non-contact pneumatic WRS seeding technology. After analyzing the injection speed required for qualified seeding under soil conditions with different water contents through bench tests, a WRS seeding device with high-pressure accelerating airflow was designed; subsequently, the characteristics of the airflow field and the influence relationship of various structural parameters on sowing quality were analyzed based on CFD techniques, and the key parameters of the seeding device were optimized.…”

Section: Introductionmentioning

confidence: 99%

Design and Experiment of Uniform Seed Device for Wide-Width Seeder of Wheat after Rice Stubble

Luo,

Chen,

Qin

et al. 2023

Agriculture

View full text Add to dashboard Cite

When wide-width sowing wheat after rice stubble (WRS) in a rice-wheat rotation area, there is a problem of poor uniform of seed distribution. To solve the problem, this study designed the seed distribution plate (SDP) structure and optimized its critical structure parameters. Firstly, combined with the operating principles of the wide-width seeder and the agricultural standards for WRS, the main structural parameters affecting seed movement were determined by a theoretical analysis of seed grain dynamics and SDP structure. Secondly, the operational performance of six different structures of SDP under different structural parameters was compared using discrete element simulation technology. The structure of SDP most suitable for WRS wide-width seeding and the value ranges of key structural parameters that have a significant impact on the coefficient of the variation of seed lateral uniformity (CVLU) were determined. Finally, the pattern and mechanism of the influence of key structural parameters of SDP on the CVLU were analyzed. The optimum parameter combination was obtained and a field validation test was conducted on this. The results showed that the anti-arc ridge and arc bottom structure (S6) is more suitable for the agronomy standards of WRS wide-width seeding. The chord length of ridge, installation inclination, angle between the chord and tangent of the end of ridge line (ACT), span, and bottom curve radius are determined as the key structural parameters affecting the CVLU, and there is a lower CVLU (42.8%) when the ACT is 13°. The primary and secondary order of the influence of each factor on CVLU is the chord length of the ridge, span, installation inclination, and bottom curve radius. The corresponding parameter values after optimization are 140 mm, 40°, 75 mm and 50 mm, respectively. A field test was conducted on the SDP after optimizing parameters, and the CVLU was 30.27%, which was significantly lower than the CVLU before optimization.

show abstract

Optimization Design of a Pneumatic Wheat-Shooting Device Based on Numerical Simulation and Field Test in Rice–Wheat Rotation Areas

Cited by 10 publications

References 21 publications

Design and Experiment of a Helicoidal Seed Tube to Improve Seed Distribution Uniformity of Seed Drills

Design and Experiment of a Helicoidal Seed Tube to Improve Seed Distribution Uniformity of Seed Drills

Design and Optimization Test of High-Speed Seed Guide Device With Conical Spiral Airflow

Design and Experiment of Uniform Seed Device for Wide-Width Seeder of Wheat after Rice Stubble

Contact Info

Product

Resources

About