Journal of Jilin University(Engineering and Technology Edition) ›› 2024, Vol. 54 ›› Issue (4): 1166-1174.doi: 10.13229/j.cnki.jdxbgxb.20221139

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Optimum design and test of compression mechanism of big square baler

Fu ZHANG1,2(),Li-min LOU1,3,Dan QIAN3,Shi-qiang WANG3,Chun-ling FENG3,Yi-rong ZHAO3()   

  1. 1.College of Agricultural Equipment Engineering，Henan University of Science and Technology，Luoyang 471003，China
    2.Collaborative Innovation Center of Advanced Manufacturing of Machinery and Equipment of Henan Province，Luoyang 471003，China
    3.Luoyang Tractor Research Institute Co. ，Ltd. ，Luoyang 471039，China
  • Received:2022-09-02 Online:2024-04-01 Published:2024-05-17
  • Contact: Yi-rong ZHAO E-mail:zhangfu30@126.com;zhaoyirong@ytogroup.com

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Abstract:

In view of the problem that the inertia force was large and the vibration was difficult to solve， the model optimization design method was studied on the compression mechanism. With the development of intelligent agricultural machinery， big square baler density of bale need controlled based on the compression force， but there was no research on the compression force time domain waveform of big square baler in China. In order to design a big square baler and test the compression force of the bale density， the minimum average acceleration of sliders in a cycle was taken as the optimal design target， the transmission angle， velocity uneven coefficient and motion non-interference was taken as the constraints. The model shows that the crank length has a greater impact on the inertial force of the crank slider mechanism， and the longer the crank， the greater the inertial force. Based on the above parameters， YTO 9YFA-220 baler was designed and the compression force was tested. The results showed that the bale density was up to 230 kg/m3. The maximum compression force was 410 kN. The compression force appears shorter times in the whole period， about a quarter of the full cycle. The compression mechanism studied is of important engineering application value for the research and development of big baler.

Key words: agricultural mechanization engineering, big square baler, pressure force, optimum design, crank slider

CLC Number: 

  • S220.1

Fig.1

Structure diagram of compression of device ofbaler"

Fig.2

Mechanism motion characteristics"

Fig.3

Influence of compression frequency on acceleration"

Fig.4

Influence of structural parameter on acceleration"

Fig.5

Acceleration at different deviations"

Fig.6

Average acceleration numerical calculation flow"

Table 1

Mechanism parameter comparison"

方案曲柄 长度r/ mm连杆 长度l/ mm偏距e/ mm压缩频次/（次·min-1）

最大

惯性力/N

平均

惯性力/N

优化3301350754759773122
原3701200804770503593

Fig.7

Force analysis of the crank and slider"

Fig.8

Compression mechanism total model"

Fig.9

Prototype test and swath"

Fig.10

Installation position of sensor"

Fig.11

Connection of oscilloscope"

Fig.12

Inertial force comparison"

Fig.13

A cycle of compressive force"

Fig.14

Relation between cutting force and compression force"

Fig.15

Diagram of density and compression force"

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