Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (9): 2706-2717.doi: 10.13229/j.cnki.jdxbgxb.20211270

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Design and test of rolling spoon type flaxes precision hole sower for caraway in northwest cold and arid agricultural region

Lin-rong SHI(),Wu-yun ZHAO()   

  1. College of Mechanical and Electrical Engineering,Gansu Agricultural University,Lanzhou 730070,China
  • Received:2022-02-21 Online:2023-09-01 Published:2023-10-09
  • Contact: Wu-yun ZHAO E-mail:shilr@gsau.edu.cn;zhaowy@gsau.edu.cn

Abstract:

In view of the practical problems such as large seed consumption, large variation coefficient of hole number and lack of seed in hole holes, a roller scoop type precision hole sowing seeder with scoop tongue was designed in Gansu mulch planting environment. By analyzing the operation principle of the seed rower and seed rowing process, the main parameters such as the composition of the rolling spoon assembly and the size, installation number and installation angle of the scooping spoon were determined, and the effects of the main spoon depth, the installation angle of the scooping spoon and the angular speed of the seed rowing wheel on the seed rowing performance of the seed rower were analyzed by the response surface method. The test showed that when the depth of main scoop was 6.68 mm, the installation angle of scoop was 7.62° and the angular speed of seed releasing wheel was 3.22 rad/s, the qualified rate of hole number was 92.5%, the rate of missed seeding was 2.54%, the rate of reseeding was 4.96%, and the seed releasing performance was better. This study can provide a basis for the design of precision hole-sowing seeding device for flaxes.

Key words: agricultural mechanical engineering, flaxes, cavity seeders

CLC Number: 

  • S223.2

Fig.1

Structure schematic diagram of flaxes rolling spoon-type cavity seeder"

Fig.2

Operation principle of cavity seeder"

Fig.3

Shape of flaxes seeds"

Fig.4

Main structural dimensions of the cavity seeder"

Fig.5

Structure of spoon-wheel combination"

Fig.6

Seed circulation process in scooping spoon"

Fig.7

Force analysis of seeds in the seed box"

Fig.8

Force analysis of seed cleaning process in the seed scoop"

Fig.9

Force analysis of seeds sliding through the seed guide slot"

Table 1

Factor level codes"

水平主勺深度X1/mm舀种勺安装角X2/(°)穴播器角速度X3/(rad·s-1
-15.902
06.754
17.6106

Fig.10

Multi-functional test bench for seeder"

Table 2

Test program and results"

序号试验因素试验结果
X1/mmX2/(°)X3/(rad·s-1穴粒数合格率Y1/%漏播率Y2/%重播率Y3/%
15.9010486.6713.330.00
27.60566.670.0093.33
36.755483.333.3313.34
46.75066.660.0093.34
55.905276.6716.676.66
66.7510666.6723.3310.00
76.750216.670.0083.33
86.7510290.003.336.67
97.605263.343.3333.33
105.905673.333.3323.34
117.600416.670.0083.33
126.755483.333.3313.34
137.6010456.670.0043.33
146.755483.333.3313.34
156.755466.670.0033.33
166.755473.3313.3313.34
175.900460.006.6633.34

Table 3

Analysis of variance for the number of grains passed in the hole"

方差 来源自由度平方和均方和FP显著性
总和1613 799.40
模型912 927.341436.3711.530.0020**
X112938.792938.7623.590.0018**
X215000.505000.5040.140.0004**
X311089.041089.048.740.0212*
X1X2144.4244.420.35660.5692
X1X31710.76710.765.710.0483*
X2X3144.3644.360.35600.5695
X121236.70236.701.900.2105
X2211289.141289.1410.350.0147*
X3211289.511289.5110.350.0147*
残差7872.06124.58
失拟项3650.02216.673.900.11
误差4222.0455.51

Fig.11

Effect of main scoop depth and wheel speed on the number of grains in the hole qualified rate"

Table 4

Analysis of variance for reply seeding rate"

方差来源自由度平方和均方和F显著性
总和16
模型91695.796.740.0099**
X114511.5517.930.0039**
X216805.9427.050.0013**
X311012.954.030.0848
X1X2111.090.0440.8397
X1X31469.161.860.2144
X2X3111.160.0440.8392
X121191.610.760.4118
X2211066.614.240.0785
X321957.633.810.0920
残差7251.62
失拟项3480.546.010.0579
误差479.92

Fig.12

Relationship between replay rate and variables"

Fig.13

Field test of cavity seeder"

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