Airflow basin structure numerical optimization analysis and suction nozzle characteristics experimental study of vacuum-vibration tray precision seeder

Liao, Caiqi; Chen, Jin; Geng, Fanzhao; Tang, Xueming

doi:10.4081/jae.2022.1294

Cited by 4 publications

(5 citation statements)

References 5 publications

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“…If the vibration can be effectively reduced, it can be used to reduce the leakage rate. This is consistent with the findings of Liao et al (2022).…”

Section: Discussionsupporting

confidence: 93%

“…Conversely, when the vibration is smaller, the seed population is less discrete, the internal friction between seeds is larger, the movement of the seed population is smaller, and the mobility of the seed population is poor, resulting in a high leakage rate. With an appropriate vibration, the seed population can reach the leakage rate of a relatively low state of "boiling" (Liao Y.T. et al, 2022;Aliiev E. et al, 2019 ;Muhammad D. et al, 2021;Igor S. et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Study on Vibration Adsorption Characteristics of Small-Particle-Size Seeds Based on Dem

DONG,

LI,

LIU

et al. 2023

INMATEH

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In order to explore the effect of vibration on the adsorption characteristics of small particle size seeds, based on the discrete element method, the changes in the variance of the average tangential force of seeds under different amplitudes were analyzed. The variance of the average tangential force of the seeds increases exponentially with the amplitude. It is inferred that the vibration will change the intensity of the population disturbance. This reduces the seed transient tangential force i.e. transient seed internal friction. To improve the adsorption characteristics of small-sized seeds, the adsorption characteristics at different amplitudes were verified with bench tests. Increasing the amplitude can improve the adsorption characteristics of small-sized seeds. To determine the optimal operating parameters, based on the Box–Behnken test principle, response surface tests were carried out using rotational speed, negative pressure, and amplitude as test factors and seed suction compliance and leakage rate as evaluation indexes. The optimum operating parameters were determined as: rotational speed of 12.05 r/min, negative pressure of 0.89 kPa, and amplitude of 5.75 mm. At this time, the seed suction pass rate was 95.1% and the leakage rate was 2.1%. which is in line with the standard requirements.

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“…If the vibration can be effectively reduced, it can be used to reduce the leakage rate. This is consistent with the findings of Liao et al (2022).…”

Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Study on Vibration Adsorption Characteristics of Small-Particle-Size Seeds Based on Dem

DONG,

LI,

LIU

et al. 2023

INMATEH

View full text Add to dashboard Cite

show abstract

“…Taking the opposite direction of the forward direction of the sprayer as the positive direction of the y-axis, and the limit position of the nozzle swinging counterclockwise as the positive direction of the x-axis, a coordinate system is established with the swinging center of the nozzle as the origin. The motion state of the seeds at the nozzle outlet is analyzed (Akhalaya et al, 2021;Cao et al, 2023;Liao et al, 2022;Tabeei et al, 2021).…”

Section: Establish Trajectory Equationmentioning

confidence: 99%

“…Set the spray barrel length of the sprayer to l, while x=l, vr=ωl. At this point, c1=c2=0, so the trajectory equations for AB and BC segments are shown in Equation ( 9) and (10). (10) Therefore, the trajectory equation of the seed with the spray barrel of the sprayer swinging back and forth for one cycle can be expressed as:…”

Section: Fig 2 -Diagram Of the Velocity Analysis Of The Seed At The O...mentioning

confidence: 99%

Study on the Uniformity of Spraying Seeds With 4bqd-40c Spraying Seeder Machine

Cao¹,

Guo²,

Fu³

et al. 2023

INMATEH

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The working parameters of the pneumatic sprayer, such as the sprayer's attitude, working airflow, and spraying amount, have an impact on the evenness of seed distribution during the process of vegetation restoration on degraded grasslands . This article focuses on the 4BQD-40C pneumatic sprayer and analyzes the impact of the sprayer's forward speed, the airflow velocity at the sprayer's inlet, and the frequency of the sprayer's swinging nozzle on the spraying quality. The conclusion shows that: 1) the equation of the seed distribution trajectory of the sprayer was obtained, laying the foundation for subsequent research; 2) the swinging frequency of the nozzle is the key factor affecting the spraying quality of the sprayer, and the optimal swinging frequency of the nozzle corresponding to different forward speeds of the sprayer was obtained based on the established trajectory equation; 3) when the sprayer performs spraying operations with the optimized forward speed and swinging frequency, the trajectory of the sprayer's seed distribution was analyzed. It was found that when the nozzle swings at each optimal frequency, the trajectory of the seed distribution is the same, and the sum of the re-sprayed and missed areas in the seed distribution area is equal.

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“…Relevant academics constructed the mathematical models of the vibration systems of the spade punch maize precision planter and the 2BM-5 air-suction no-till planter to explore the vibration properties of the planter in the field [12][13][14]. To investigate the effects of various vibration frequency intervals and amplitudes on seeding performance, the vibration test results of the 2BFQ-6 precision combine seeder in the field were conducted as guidance by Liao et al To provide a reference basis for research on increasing beneficial vibration intervals or reducing vibration interference in practice [15][16]. Once the effects of vibration on the seeding performance of the seed-metering device have been identified, the ultimate objective is to enhance performance by eliminating the vibration impact.…”

Section: Introductionmentioning

confidence: 99%

Simulation and optimization of the spoon-wheel type maize precision seed- metering device based on vibration

Han,

Wang,

et al. 2023

Preprint

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Due to the sticky soil and uneven terrain in southwest China, the planters will vibrate in the field, and the seed-metering device will also be vibrated up and down with them, hence increasing the leakage rate and deteriorating the plant distribution uniformity in maize. The spoon-wheel disc is the essential part of the spoon-wheel seed-metering device, and the spoon shape contributes to the device’s capacity for seed-filling, seed-cleaning, and seed-delivery. DEM simulation and optimization of the shapes and quantity of spoons under vibrational conditions are investigated in this paper. EDEM was adopted to establish DEM models of ‘Zhongyu No.3’ coated maize seeds and the spoon-wheel seed-metering device first, and four additional spoons of various shapes (labeled as K1 ~ K5, respectively) were designed based on the original spoon structure. Based on the in-field vibrational properties of the spoon-wheel planter at diverse operating speeds, a single-factor simulation test of the spoon structures under vibrational conditions was implemented with the variation of the seed acceleration inside the spoon in the Y-direction as an evaluation index. The results indicated that the acceleration of seeds in the Y-direction in spoons (K2 ~ 5) were all less fluctuating than those in the original spoon (K1), and the multiple rate was the largest in spoon (K5), implying that the seeding performance of spoons (K2 ~ 4) was relatively more favorable. According to the results of the single-factor simulation test, a 3-factor and 4-level simulation orthogonal test was conducted with the working speed, the number and shapes of spoons as testing factors, and the qualified rate, multiple rate, leakage rate, and variation coefficient as evaluation indicators. The ultimate optimal working speed of the spoon-wheel maize precision planter in southwest China was identified as 3 km/h, with 22 spoons on the spoon-wheel disc, and the ideal spoon shape being K3. The bench validation test was executed under vibrational conditions based on the optimal spoon structure and operation settings of the seed-metering device. The qualified rate of the seed-metering device exceeded 94.5% at an operating speed of 3 ~ 4 km/h, while the multiple rate was less than 4%, the leakage rate was lower than 1.5%, and the variation coefficient was smaller than 25.5%. The variety adaptability test was launched when the working speed was 3 km/h. The qualified rate of various maize varieties were all more than 96.5%, the multiple and leakage rates were both less than 2%, which satisfies the technical requirements of the maize precision sowing in southwest China.

show abstract

Airflow basin structure numerical optimization analysis and suction nozzle characteristics experimental study of vacuum-vibration tray precision seeder

Cited by 4 publications

References 5 publications

Study on Vibration Adsorption Characteristics of Small-Particle-Size Seeds Based on Dem

Study on Vibration Adsorption Characteristics of Small-Particle-Size Seeds Based on Dem

Study on the Uniformity of Spraying Seeds With 4bqd-40c Spraying Seeder Machine

Simulation and optimization of the spoon-wheel type maize precision seed- metering device based on vibration

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