Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (7): 1709-1718.doi: 10.13229/j.cnki.jdxbgxb20210103

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Analysis and experiment on parameters of plough body of rapeseed direct seeder

Guo-liang WEI1,2(),Qing-song ZHANG1,2,Biao WANG1,2,Kun HE1,2,Qing-xi LIAO1,2()   

  1. 1.College of Engineering,Huazhong Agricultural University,Wuhan 430070,China
    2.Key Laboratory of Agricultural Equipment in Mid?lower Yangtze River,Ministry of Agriculture and Rural Affairs,Huazhong Agricultural University,Wuhan 430070,China
  • Received:2021-01-28 Online:2022-07-01 Published:2022-08-08
  • Contact: Qing-xi LIAO E-mail:1142673534@qq.com;liaoqx@mail.hzau.edu.cn

Abstract:

To solve the problems of low straw burying rate and obvious straw returning and standing when plow body of the straw burying part of rapeseed direct seeding was designed with traditional turning way in rice oil rotation area of middle and lower reaches of Yangtze River, the technology scheme of side overturning and burying based on first lifting and then buckling of soil ridge was proposed, and a kind of buckling plough matched with rape direct seeder was designed, which can realize the function of side overturning and burying of soil ridge when the previous stubble was high stubble rice straw. The main structure and working process of the buckle plough were analyzed, and the mechanical model of the buckle plough stage was constructed. The buckle plough's buckle mode was defined, and the fact that the buckle plough can better realize the buckle function when the width depth ratio was 1.5~1.96 was determined. Based on the buckle way, the main structural parameters of plow surface were determined, and the operation resistance was analyzed. The results of field performance of buckle plough showed that the optimal parameters were: plowshare width of 150 mm, working depth of 180 mm, the resistance of 5.54 kN, and the rate of 92.25%; the field comparative test of button plow and turn plow showed that the rate of bucking was 34.54% higher than that of turning plow, and the performance was better than turning plow. The field verification test was carried out on the rape direct seeder with plough and rotary combination under the optimal parameters of bucking plough. The results showed that the average straw coverage rate was 91.41%, the evenness of compartment surface was 16.22~21.05 mm, and the broken soil rate was higher than 90.89%, which met the requirements of rape seed bed tillage. This study can provide a reference for the design of straw burying device and plow surface.

Key words: agricultural mechanization engineering, rapeseed, plow surface, buckle way, wide and deep ratio

CLC Number: 

  • S222.12

Fig.1

Schematic diagram of plowing and rotary tillage combined rapeseed direct seeding machine"

Fig.2

Schematic diagram of buckle plow structure"

Fig.3

Process scheme diagram of soil ridge buckle ridge"

Fig.4

Schematic diagram of forming plough body surface"

Table 1

Change law of unit vector"

zθb(u)zθb(u)
050(0.64,0.71,0.30)2547.3(0.68,0.67,0.30)
6.3550(0.64,0.71,0.30)3045.6(0.7,0.65,0.30)
1049.9(0.64,0.71,0.30)3543.5(0.73,0.61,0.30)
1549.6(0.65,0.70,0.30)4041.1(0.75,0.59,0.30)
2048.5(0.66,0.69,0.30)4240(0.77,0.56,0.30)

Fig.5

Force diagram of plow surface"

Table 2

Test field conditions"

工况试验类型

平均土壤

含水/%

平均土壤

坚实度/kPa

秸秆(干质量)覆盖量/(g·m-2

秸秆

含水

率/%

1扣垡犁田间作业性能和对比试验28.32162438251.27
2

整机田间

验证试验

29.46103547862.34

Table 3

Test factors and levels"

水平犁铧宽度/mm耕深/mm
1100160
2150180
3200200

Table 4

Results of operation performance test"

试验号试验因素试验指标
AB扣垡率/%阻力/kN
11185.164.05
21287.844.98
31388.586.23
42186.364.28
52292.255.54
62393.717.06
73186.814.81
83292.356.21
93394.218.15

Table 5

Variance analysis"

差异源平方和自由度均方F扣垡率差异源平方和自由度均方F阻力
因素A17.4928.745.11因素A2.5621.2814.92*
因素B57.93228.9716.94*因素B11.2925.6465.80**
误差6.8441.71误差0.3440.09
总和82.268总和14.198

Table 6

Field test results of buckle plow and traditional plow"

试验指标试验组扣垡犁翻垡犁
平均耕深/mm1181186
2178181
3184183
耕深稳定性系数/%191.8590.56
293.2493.58
392.1392.12
平均耕宽/mm1308309
2301299
3312311
耕宽稳定性系数/%176.2385.26
280.4587.62
378.1280.04
扣垡率/%192.3358.62
291.6852.15
392.7462.36

Fig.6

Field operation effect"

Fig.7

Field test effect of machine"

Table 7

Field test results of the machine"

试验指标试验组试验结果
平均耕深/mm1226
2235
3230
耕深稳定性系数/%190.11
293.46
392.08
平均耕宽/mm12357
22336
32392
耕宽稳定性系数/%194.21
292.18
393.54
厢面平整度/mm120.13
216.22
321.05
秸秆埋覆率/%192.03
290.88
391.35
碎土率/%190.89
291.38
392.59
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