Experiment of sucking performance of inside-filling pneumatic type precision hill-drop drilling seed-metering device for rice

doi:10.3969/j.issn.1004-1524.2019.08.20

›› 2019, Vol. 31 ›› Issue (8): 1379-1387.DOI: 10.3969/j.issn.1004-1524.2019.08.20

• Biosystems Engineering • Previous Articles Next Articles

Experiment of sucking performance of inside-filling pneumatic type precision hill-drop drilling seed-metering device for rice

ZHANG Shun^1,2, YANG Jitao¹, LI Yong¹, LIAO Juan¹, LI Zhaodong^1,2, ZHU Dequan^1,*

1. School of Engineering, Anhui Agricultural University, Hefei 230036, China;
2. Engineering Laboratory of Intelligent Agricultural Machinery Equipment, Hefei 230036, China

Received:2019-04-15 Online:2019-08-25 Published:2019-08-30

Abstract

Abstract: In order to meet the direct seeding requirement of 2-4 seeds per hill for hybrid rice, an unique inside-filling pneumatic type precision hill-drop drilling seed-metering device was designed with multi-suction holes-socket structure. The structural parameters of the sucking cylinder were analyzed and designed in this paper. The hybrid rice seed Zhongnong2008 was selected as experimental material, and the effects of the three main impact factors (cylinder rotational speed, vacuum degree and seed-inlet height) on miss-sucking index, qualified index and multi-sucking index were studied by orthogonal experimental design, and the seed sucking adaptability tests of hybrid rice varieties with different sizes were carried out. The results showed that the orders of factors affecting the seed sucking performance of the metering device were different according to different evaluation indexes, and the optimal working parameter combination was cylinder rotational speed of 17.14 r·min^-1, vacuum degree of 1.1 kPa and seed-inlet height of 25 mm. Under this working parameter combination, the miss-sucking index, qualified index and multi-sucking index were 1.0%, 92.4%, and 6.6%, respectively. The seed sucking adaptability tests were carried out under the same working conditions with three different sized hybrid rice seeds (short size Tesan'ai No. 2, medium size Gangyou898 and long size Fengliangyou3948), respectively. All the miss-sucking and multi-sucking indexes were less than 2.4% and 7.8%, respectively, and all the qualified indexes were higher than 91.2%. Experiment results indicated that the multi-suction holes-socket structure of the seed-metering device had good adaptability to different hybrid rice varieties, and the seed-sucking performance could meet the agronomic requirements of precision hill-drop drilling for hybrid rice.

Key words: agricultural machinery, hybrid rice, socket, pneumatic, precision hill-drop drilling

CLC Number:

S223.2

ZHANG Shun, YANG Jitao, LI Yong, LIAO Juan, LI Zhaodong, ZHU Dequan. Experiment of sucking performance of inside-filling pneumatic type precision hill-drop drilling seed-metering device for rice[J]. , 2019, 31(8): 1379-1387.

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Experiment of sucking performance of inside-filling pneumatic type precision hill-drop drilling seed-metering device for rice

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