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Topic

Technologies and technical equipment for agriculture and food industry

Volume

Volume 72 / No. 1 / 2024

Pages : 324-338

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EXPERIMENTAL STUDY ON THE SEEDING PERFORMANCE OF THE SPOON-WHEEL MAIZE SEED-METERING DEVICE UNDER VIBRATION CONDITIONS

勺轮式排种器在振动条件下的排种性能试验研究

DOI : https://doi.org/10.35633/inmateh-72-30

Authors

Qing WANG

College of Mechanical & Electrical Engineering, Sichuan Agricultural University

(*) Dandan HAN

College of Mechanical & Electrical Engineering, Sichuan Agricultural University

You XU

College of Mechanical & Electrical Engineering, Sichuan Agricultural University

Yuxia HUANG

College of Mechanical & Electrical Engineering, Sichuan Agricultural University

Chao TANG

College of Mechanical & Electrical Engineering, Sichuan Agricultural University

Wei LI

College of Mechanical & Electrical Engineering, Sichuan Agricultural University

(*) Corresponding authors:

[email protected] |

Dandan HAN

Abstract

The seeder was tested and evaluated for field operations vibration characteristics in light of the issue that the spoon-wheel maize precision seeder vibrates due to the field operating conditions, which impairs the performance of the seed-metering device. During field testing, it was discovered that the seed-metering device vibrated greater as the forward speed increased, resulting in a higher peak vibration acceleration. However, fluctuations in forward speed did not affect the frequency distribution of the peak vibration acceleration. Time-domain and spectrogram investigations revealed that the vibration frequency of the seed-metering device was predominantly within 0~10 Hz for seeder operating speeds ranging from 2~6 km/h, with acceleration values spanning from 0.85~1.86 m/s2. An electromagnetic seeding test stand was established in response to the discoveries. The essential variables governing the seeding performance of the spoon-wheel seed-metering device were then investigated using orthogonal tests, such as forward speed, vibration frequency, and vibration acceleration. The empirical results elucidated a hierarchical relationship between these factors and seeding quality. Specifically, vibration frequency emerged to be the predominant factor, followed by vibration acceleration, and forward speed. The seeding quality of the seed-metering device was negatively correlated with increases in forward speed and vibration acceleration, which led to a lower qualified rate, higher leakage rate, and variation coefficient. Overall, the qualified rate, leakage rate, and variation coefficient were all significantly influenced by the three factors.

Abstract in Chinese

针对勺轮式玉米精量播种机受田间作业工况的影响而产生振动,从而影响排种器排种性能的问题,对播种机进行田间作业振动特性测试与分析。田间试验结果表明,随着前进速度的增加,排种器受到的振动越剧烈,振动加速度峰值越大。但是振动加速度峰值的频率分布不受前进速度影响。当播种机的田间作业速度为2~6 km/h时,通过时域和频谱图分析,发现排种器的振动主频集中在0~10 Hz,加速度范围为0.85~1.86 m/s2。搭建振动排种试验台,通过正交试验对影响勺轮式排种器排种性能的前进速度、振动频率、振动加速度三个因素进行试验研究。结果表明:影响合格指数的因素主次关系为振动频率、振动加速度、前进速度;随着前进速度和振动加速度的增加,会导致排种器的合格指数降低、漏播指数及变异系数上升;三个因素对合格指数、漏播指数和变异系数均有显著性影响。

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