Study on Negative-pressure Precision Millet Seed-metering Device

Yu, Huali; Zhao, Xiaoshun; Liu, Zhanliang; Du, Xiaodong; Tian, Cong

doi:10.19026/ajfst.7.1282

Cited by 4 publications

(4 citation statements)

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“…By the principles, the seed metering devices can be divided into mechanical and pneumatic type devices, among which, the air-suction seed metering device is a research hotspot at present (Dylan et al, 2013;Jia et al, 2018;Singh et al, 2007;Wang et al, 2017;Yang et al, 2016). Most studies on air-suction seed metering device focus on the effect rule of the design of physical dimension of the seedpicking mechanism (Cujbescu et al, 2019;Liao et al, 2018), negative pressure value and forward speed and working parameters on the metering performance, or on optimizing seed metering devices for different seeds (Zhang et al, 2015;Zhang et al, 2020), such as corn, sunflower seeds, peanuts, rape seeds and millet seeds (Ding et al, 2018;Yu et al, 2014;Yu et al, 2015;Zhang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of Seed Filling and Releasing Angles on the Performance of Compound Vacuum Seed Metering Device

Liu

Zhang

Han

et al. 2021

INMATEH

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In this paper, taking compound air-suction seed metering device as the subject, the effect rule of seed filling angle and seed releasing angle on the performance of seed filling and seed metering is studied. An indoor test was conducted with a JPS-12 metering test bench and a high-speed camera system. The starting and ending angles of the air chamber were changed by adjusting the regulating plate, that is, the angles of seed filling and seed releasing, and the filling and seed metering performance was taken as evaluation indexes. The test results show that: the seed filling angle has significant effect on the seed filling effect, and the miss fill index decreases with the increase of the quality of fill index. When the seed filling angle exceeds 50°, they will stabilize gradually ending at the multiple fill index of 0%. The negative pressure and operating speed are interactive and have a significant effect on filling performance. The seed releasing angle has significant effect on the metering performance. With the increase of the angle, the quality of feed index increases firstly and then decreases. The multiple index and miss index are opposite to the quality of feed index which is the max at the seed releasing angle of 39.5°. The negative pressure and forward speed are interactive and have a significant effect on metering performance. The quality of feed index under the same condition is lower than that of fill index.

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Section: Introductionmentioning

confidence: 99%

Effect of Seed Filling and Releasing Angles on the Performance of Compound Vacuum Seed Metering Device

Liu

Zhang

Han

et al. 2021

INMATEH

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“…They further took advantage of cameras and photoelectric sensors to test the seeding performance and analyzed the performance with the bench test (Zhao et al, 2015). The fluid simulation software has also been applied to simulate (Yu et al, 2015;Zhang et al, 2015) and analyze the airflow field of the seed metering device (Liu et al, 2013;Yu et al, 2014), thus optimizing the shape design of the suction hole and the seed disturbing mechanism (Dylan, S. J. et al, 2013;Singh et al, 2007;Xing et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Based on the operating principle of the vacuum seed metering device, it can be found that the airflow field can greatly affect the seed filling performance. The existing researches on the vacuum seed metering device mainly focused on the seed-absorbing performance of the negative pressure airflow (Yu et al, 2015;Zhang et al,2020), but neglected the impact of the fan speed, component structure near the suction hole and vacuum chamber structure on the airflow field. Therefore, in this paper, the above factors are applied in research so as to deeply explore the airflow field characteristics of vacuum seed metering devices.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Air Flow Field Characteristics of Suction Metering Device

Zhang

Liu

Zhuang

et al. 2021

INMATEH

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The vacuum seed metering device absorbs seeds by using the negative pressure generated by vacuum air flow. Therefore, it is of great significance to study the variation law of pyrolysis gas flow field to improve its seed metering performance. In this paper, the common disc and composite disc were selected as the research objects and tested on the indoor test-bed. The negative pressure was measured by U-type barometer, and the effects of fan speed, suction hole size, seed hole structure and air chamber thickness on the air flow field were studied. Firstly, the influence of fan rotation frequency on vacuum chamber negative pressure is studied, and the variation law of negative pressure in vacuum chamber and fan port of common disc and composite disc under the same frequency is compared. Secondly, the suction holes in the vacuum chamber were numbered, the negative pressure distribution of the suction holes was measured, and the influence of the number and diameter of the suction holes on the negative pressure of the vacuum chamber was studied. Finally, the negative pressure was measured at the distance of 0 to 10 mm from the suction hole to study the effect of seed hole structure on the air flow field. Moreover, increase the additional thickness of the vacuum chamber from 0 to 40 mm to study the influence of the chamber thickness on the distribution of the gas flow field. This paper makes a comprehensive experimental analysis on the influencing factors of air flow field of air suction seed metering device, necessary for future design of air suction seed metering device.

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“…Tests have proved that seed metering performance of pneumatic seed-metering device is far superior to that of mechanical seed-metering device, which saves seeds, injuring no seed. It is universal to seeds of different dimensions, having high seeding uniformity and being easy to achieve precise seeding (Huali et al, 2015;Zhao et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Pneumatic Precise Radish Seeder

Zhao¹,

Yu²,

Zhang³

et al. 2016

AJFST

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In order to solve the problem that the seeding method of radish is still manually dibble seeding or drilling by simple machinery to realize large-scale cultivation of the radish and reduce its labor input and improve operation efficiency, a precision radish seeder used to large-scale plant radishes was to be developed. It adopt the suction principle to realize precise dibble seeding of radish. It can be done either in ridge, ditching, sowing, covering soil and plastic suppression operation. Field tests have proved that the seeder is stable seeding performance and good sowing uniformity and sowing depth coherence, so it meets the radishes grown agricultural requirements.

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Study on Negative-pressure Precision Millet Seed-metering Device

Cited by 4 publications

References 0 publications

Effect of Seed Filling and Releasing Angles on the Performance of Compound Vacuum Seed Metering Device

Effect of Seed Filling and Releasing Angles on the Performance of Compound Vacuum Seed Metering Device

Experimental Study on Air Flow Field Characteristics of Suction Metering Device

Pneumatic Precise Radish Seeder

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