Study on Negative-pressure Precision Millet Seed-metering Device

A negative pressure chamber rotary precision seed metering device was designed to achieve the buckwheat precision sowing goal, solving the problems of traditional negative pressure chamber poor sealing and air suction seed metering device high power consumption. The planting plate of the device was fixedly connected with the shell of the air chamber forming a negative pressure chamber, which rotates around an axis. A planting plate suitable for buckwheat seed metering was designed. Single factor test and response surface test were carried out on the seed metering device. Results showed that the buckwheat precision seed metering achieved best performance when the negative pressure, suction hole diameter and rotation speed was 2.4 kPa, 2.0 mm and 25 r/min respectively. The qualified index, multiples index and miss-seeding index were respectively 88.32%, 7.35%, and 4.33%, which met the technical requirements of buckwheat precision sowing. The results of the study provided references for the design and application of buckwheat precision seed metering device.

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Design of Millet Seed-metering Device under Hole-seeding Conditions

Advance Journal of Food Science and Technology ◽

10.19026/ajfst.9.1975 ◽

2015 ◽

Vol 9 (8) ◽

pp. 614-618

Author(s):

Xiaoshun Zhao ◽

Pengyun Xu ◽

Zhanliang Liu ◽

Huali Yu ◽

Xiong Du

Keyword(s):

Millet Seed ◽

Seed Metering Device

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EXPERIMENTAL STUDY ON AIR FLOW FIELD CHARACTERISTICS OF SUCTION METERING DEVICE

INMATEH Agricultural Engineering ◽

10.35633/inmateh-65-06 ◽

2021 ◽

pp. 57-66

Author(s):

Meng Zhang ◽

Zeqi Liu ◽

Yajun Zhuang ◽

Jie Han ◽

Yin Xiang ◽

...

Keyword(s):

Flow Field ◽

Negative Pressure ◽

Gas Flow ◽

Vacuum Chamber ◽

Air Flow ◽

Test Bed ◽

Seed Metering Device ◽

Suction Hole ◽

Hole Structure ◽

Gas Flow Field

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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EFFECT OF SEED FILLING AND RELEASING ANGLES ON THE PERFORMANCE OF COMPOUND VACUUM SEED METERING DEVICE

INMATEH Agricultural Engineering ◽

10.35633/inmateh-65-16 ◽

2021 ◽

pp. 153-162

Author(s):

Zeqi Liu ◽

Zhang Meng ◽

Jie Han ◽

Yajun Zhuang ◽

Xiang Yin ◽

...

Keyword(s):

Negative Pressure ◽

High Speed ◽

Test Results ◽

Camera System ◽

Seed Filling ◽

Evaluation Indexes ◽

Air Chamber ◽

The Subject ◽

Seed Metering Device

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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ENGINEERING MANAGEMENT OF TILLAGE EQUIPMENT WITH CONCAVE DISK SPRING SHANKS

INMATEH Agricultural Engineering ◽

10.35633/inmateh-60-05 ◽

2020 ◽

Vol 60 (1) ◽

pp. 45-52 ◽

Cited By ~ 10

Author(s):

Ivan Rogovskii ◽

Luidmyla Titova ◽

Viktor Trokhaniak ◽

Oleksandr Haponenko ◽

Mykola Ohiienko ◽

...

Keyword(s):

Negative Pressure ◽

Orthogonal Experiment ◽

Structural Parameters ◽

Engineering Management ◽

Pneumatic Cylinder ◽

Seeding Rate ◽

Working Principle ◽

Main Components ◽

Seed Metering Device ◽

Qualification Rate

The roller for seeds of different sizes, a variable-size pneumatic cylinder precision seed metering device was designed, which could realize the precision seeding of different diameter seeds without changing the roller. The structure and working principle of seed metering device were explained, and the structural parameters of the main components of the seed meter were determined. The ANSYS was used to analyse the influence of the size of the negative pressure inlet pipe and the shape of the eyelet on the airflow velocity in a negative pressure chamber. Based on the above optimal structure, the orthogonal experiment of seed metering device was carried out. Testing results showed: under the negative pressure of 4 kPa, roller speed of 16.93r/min and the wind speed of 11.48m/s, the seed metering device had the best seeding effect. The qualification rate of the seed metering device was 92.37%, the miss-seeding rate was 3.74% and the over-seeding rate was 3.88%.

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DESIGN AND TEST OF VARIABLE DIAMETER PNEUMATIC DRUM TYPE BEAN SEED METERING DEVICE

INMATEH Agricultural Engineering ◽

10.35633/inmateh-60-01 ◽

2020 ◽

Vol 60 (1) ◽

pp. 9-18 ◽

Cited By ~ 1

Keyword(s):

Negative Pressure ◽

Orthogonal Experiment ◽

Structural Parameters ◽

Pneumatic Cylinder ◽

Seeding Rate ◽

Variable Diameter ◽

Working Principle ◽

Main Components ◽

Seed Metering Device ◽

Qualification Rate

The roller for seeds of different sizes, a variable-size pneumatic cylinder precision seed metering device was designed, which could realize the precision seeding of different diameter seeds without changing the roller. The structure and working principle of seed metering device were explained, and the structural parameters of the main components of the seed meter were determined. The ANSYS was used to analyse the influence of the size of the negative pressure inlet pipe and the shape of the eyelet on the airflow velocity in a negative pressure chamber. Based on the above optimal structure, the orthogonal experiment of seed metering device was carried out. Testing results showed: under the negative pressure of 4 kPa, roller speed of 16.93r/min and the wind speed of 11.48m/s, the seed metering device had the best seeding effect. The qualification rate of the seed metering device was 92.37%, the miss-seeding rate was 3.74% and the over-seeding rate was 3.88%.

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