Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (11): 2756-2764.doi: 10.13229/j.cnki.jdxbgxb20210385

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Design and experiment of harvesting device for industrialized production line of Shanghaiqing

Bai-gong ZENG1(),Kui-liang LI1,Jin YE1,Li-li REN2(),Jaloliddin Rashidov3,Ming ZHANG1   

  1. 1.College of Engineering and Technology，Southwest University，Chongqing 400715，China
    2.College of Biological and Agricultural Engineering，Jilin University，Changchun 130022，China
    3.Faculty of Hydrotechnical Constructions，Tashkent Institute of Irrigation and Agricultural Mechanization Engineers，Tashkent 845250，Uzbekistan
  • Received:2020-08-20 Online:2022-11-01 Published:2022-11-16
  • Contact: Li-li REN E-mail:zengbaigong@163.com;liliren@jlu.edu.cn

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Abstract:

To solve the problems of low mechanization level， high labor intensity， long time consuming and low efficiency in the harvesting process of industrialized planting leafy vegetables， the representative Shanghaiqing was taken as the research object， a harvesting device with band saw cutting， screw tensioning and V-belt transmission， was designed for the production line of Shanghaiqing. Based on the theoretical research and simulation analysis of cutting process of Shanghaiqing roots， the main factors affecting the cutting effect was determined， and the prototype was trial-manufactured and orthogonal tests were carried out， the optimal combination of parameters was obtained： belt saw was no teeth， feed speed was 0.05 m/s and cutting speed was 400 r/min. The verification test results show that cutting effect is well and the end face is smooth， and the qualified rate is 88.9%. Therefore， the harvesting device meets the requirements of high efficiency and labor saving. This study can provide reference for the research and development of harvesting device in the assembly line production of industrialized planting leafy vegetables.

Key words: agricultural mechanization engineering, industrialization, Shanghaiqing, band saw cutting, simulation analysis

CLC Number: 

  • S225.92

Fig.1

3D drawing of cutting device"

Fig.2

Matching diagram of cutting device and pipeline"

Table 1

Main design parameters"

设计参数参数值
尺寸规格（长×宽×高）/（mm×mm×mm）1255×500×1000
总质量/kg≤120
切割转速/（r·min-1）300~1000
额定电压/V380
功耗/kW1.1
切割合格率/%≥85.0
切割幅宽/mm450

带锯规格（周长×宽×厚）

/（mm×mm×mm）

2830×16×0.5

Fig.3

Schematic diagram of cutting velocity synthesis"

Fig.4

Schematic diagram of root cutting force"

Fig.5

3D diagram of belt saw wheel"

Fig.6

3D drawing of the tensioning device"

Table 2

Main physical property parameters of the root"

参 数参数值
密度/（kg·m-3）946
X方向弹性模量/Pa1.5×106
Y方向弹性模量/Pa1.5×106
Z方向弹性模量/Pa4×106
泊松比0.3

Fig.7

Grid generation of roots cutting model"

Fig.8

Severed roots"

Fig.9

Tooth types of belt saw"

Fig.10

Simulation stress-speed result diagram"

Fig.11

Distribution map of planting spacing of Shanghaiqing"

Fig.12

Test preparation"

Fig.13

Cutting speed-damage rate diagram"

Fig.14

Cut state of Shanghaiqing"

Table 3

Scheme and results of orthogonal test"

序号试验因子合格率/%
A/（m?s-1）B/（r?min-1）空列C
11：0.031：40011：锯齿82.60
212：50022：月牙82.60
313：60033：光刃92.60
42：0.0412394.95
5223177.60
6231282.60
73：0.0513287.60
8321394.95
9332178.90
K1j257.80265.15260.15239.10
K2j255.15255.15244.25252.80
K3j261.45254.10262.80282.50
Rj6.3011.053.7040.40

Fig.15

Effect picture of Shanghaiqing harvest"

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