Seed-Filling Characteristics of a Centralized Seed-Metering Device for Rapeseed Caused by Vibration

Wu, Wencheng; Chang, Cheng; Li, Tao; Hu, Hongji; Zhou, Zhonglin; Yang, Wenhao; Guo, Jinyue; Zhu, Peixu; Li, Ju; Hu, Jianfeng; Cheng, Hong; Tao, Youfeng; Zhou, Wei; Deng, Fei; Chen, Yong; Wang, Ren; Lei, Xiaolong

doi:10.3390/agriculture12070965

Cited by 8 publications

(3 citation statements)

References 25 publications

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“…Sowing precision was influenced by seedbed preparation and the working speed, which decreased as the seedbed developed larger irregularities. Wu et al [6] measured seed-filling characteristics under vibration conditions with a frequency of 0-180 Hz, which had a significant impact on the target seed rate, the missing rate of seed filling, the multiple ratios of seed filling, the seed-filling angle, and the number of retained seeds when the speed of the seed metering wheel was 20 rpm. Yu et al [7,8] investigated the effects of both internal and external excitation vibrations on the efficacy of a seed dispenser in a rice precision hole seeder using a six-degree spatial vibration tester.…”

Section: Introductionmentioning

confidence: 99%

Sowing Performance of the Seeder Drill for the 2BYG-220 Type Combined Rapeseed Planter under Vibration Conditions

Zhang,

Liu,

et al. 2024

Applied Sciences

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The direct sowing of rapeseed requires shallow tillage for stubble removal, which can cause significant vibrations that impact the seed metering device, thereby affecting the quality of seeding. This study focuses on a double-row hole-wheel-type seed metering device on the 2BYG-220 type combined rapeseed planter. Initially, vibrations experienced by the seed drill during field operations were measured and analyzed, revealing that the vibration frequencies during field operations predominantly ranged between 0 and 25 Hz. Consequently, an eccentric wheel–return-spring-type vibration seed metering test rig was designed, manufactured, and set up. By swapping out the eccentric wheel on the test rig, the amplitude was mainly concentrated within 3 mm. The test results indicate that amplitude had a minimal impact on the performance of the double-row hole-wheel-type rapeseed seed metering device, whereas vibration frequency had a more significant effect. When the vibration frequency was between 0 and 10 Hz, the seed metering device maintained a stable output between 7.6 and 8.2 g/min, with minimal impact from vibrations: the coefficient of variation for seeding uniformity ranged between 35.81% and 44.58%, indicating stability and good uniformity. However, when the vibration frequency ranged from 10 to 24 Hz, the output of the seed metering device decreased rapidly and exhibited a linear relationship with frequency changes, with a determination coefficient (R2) of 0.92376. The coefficient of variation for seeding uniformity increased rapidly and also showed a linear relationship with frequency changes, with a determination coefficient (R2) of 0.87973. Vibrations with frequencies greater than 10 Hz had a considerable impact on the performance of the seed metering device.

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Section: Introductionmentioning

confidence: 99%

Sowing Performance of the Seeder Drill for the 2BYG-220 Type Combined Rapeseed Planter under Vibration Conditions

Zhang,

Liu,

et al. 2024

Applied Sciences

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“…Gao et al found that inside the filling space of the device, a better filling capacity could be achieved by a better match between the particle velocity and the filling performance [10]. Wu et al studied the unmeasurable seed motion characteristics by measuring the vibration characteristics of the seed discharge device based on DEM simulation, and determined the filling characteristics under vibration conditions via a bench test [11]. Lai et al adopted EDEM software based on the discrete element method to conduct a simulation, calculation and analysis of the seed discharge performance of a seed discharge device under four different groove wheel speeds and six different mixing wheel speeds [12].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Friction-Filling Performance of Friction-Type Vertical Disc Precision Seed-Metering Device Based on EDEM

Wang,

Kang,

Wang

et al. 2023

Agriculture

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A seed-metering device is a key component for precision seeding and the core component of precision seed-metering devices. Nowadays, high-speed seeding is a trend in the development of seed-metering devices, but the filling performance of mechanical seed-metering devices decreases under the condition of high speed. Therefore, this paper explores a controllable method to improve the filling force of seeds, thereby increasing the limit operation speed of the existing mechanical seed-metering devices, so as to achieve high-speed seeding. The friction-filling method of friction vertical disc precision seed-metering devices was numerically simulated using the DEM. In this paper, the relationship between the relevant parameters and seed-filling force was confirmed via comparing theoretical formulas. The friction-filling method was studied via numerical simulation and experimental verification. This research demonstrated that during the process of friction filling, the pressure on the side wall of the tube increased with the e exponent with the change in the position of the particles. When the friction coefficient between the particles and the side wall is less than the friction coefficient between the particles, the e exponent increases. A surge occurs when the ratio of the square tube side length to the particle radius is n3+2(n=1,2,3).

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“…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. Wu et al elevated the target seeding rate of a rapeseed centralized seed-metering device at different vibration frequencies by adjusting the longitudinal distance [17].…”

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.

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Seed-Filling Characteristics of a Centralized Seed-Metering Device for Rapeseed Caused by Vibration

Cited by 8 publications

References 25 publications

Sowing Performance of the Seeder Drill for the 2BYG-220 Type Combined Rapeseed Planter under Vibration Conditions

Sowing Performance of the Seeder Drill for the 2BYG-220 Type Combined Rapeseed Planter under Vibration Conditions

Numerical Analysis of Friction-Filling Performance of Friction-Type Vertical Disc Precision Seed-Metering Device Based on EDEM

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

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