Ergonomic Design of Cab Structure for Wheeled Combine Harvester

Liu, Sifan; Tang, Zhong; Zhang, Ben; Liang, Yaquan; Gu, Xinyang

doi:10.1590/1809-4430-eng.agric.v42n3e20220023/2022

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…The design of the ramie harvester for fiber is mainly based on other tall crop harvesters, such as reed harvesters, rape harvesters and corn harvesters [13][14][15]. Liu Jiajie [16] designed a 4QM-4.0 hemp green fodder combine harvester and carried out a pilot study on the reciprocating cutting table to reduce the problem of clogging and entanglement, and the cutting quality was good. Yang Yanwei [17] designed a combine harvester for ramie fiber and fodder harvesting.…”

Section: Introductionmentioning

confidence: 99%

Design and Parameter Optimization of Conveying and Baling Devices for Ramie Cutting and Baling Machine

Si,

Huang,

Shen

et al. 2024

Agriculture

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Conveying and baling are two important links in the mechanized harvesting of ramie, in the face of ramie cutting and baling harvesting technology research gaps, low stalk conveying rate, high breaking rate and other problems. In this paper, according to the technical requirements of ramie harvesting, we designed a conveying and baling device, the hand-held ramie cutter. First, the key mechanism of the conveying and baling device of the equipment was designed. Then, we analyzed the location of stem clogging and the reasons for the breaking problem during the conveying and baling process. The field harvesting experiments were carried out according to the principles of Box–Behnken experimental design. Taking the machine travelling speed, conveying speed and ramie raking frequency as the test factors and using the Design-Expert V8.0.6.1 to process the data, we established a regression model for each experimental factor on the conveying rate and breaking rate. The order of influence of several factors on the breaking rate is: X2 > X1 > X3; and the effects of the three factors on the conveying rate were X3 > X2 > X1. Through response surface analysis (RSA), the effects of the factors on the indicators were explained, as was the impact of the factors on the indicators. Finally, the parameter optimization was carried out with the delivery rate as the core index. The best combination of motion parameters was obtained as follows: the travelling speed was 0.37 m/s, the chain conveying speed was 1.1 m/s, and the raking frequency was 144 times/min. With the combination of parameters under the field test verification, the results show that compared with the original work quality, the stalk delivery rate increased from 85.2% to 93% (an increase of 7.8%), the stalk breaking rate fell from 31.1% to 20.4% (a decrease of 10.7%). The performance of ramie harvesting and baling was greatly improved, and we achieved relatively satisfactory results.

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Section: Introductionmentioning

confidence: 99%

Design and Parameter Optimization of Conveying and Baling Devices for Ramie Cutting and Baling Machine

Si,

Huang,

Shen

et al. 2024

Agriculture

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“…The basic theoretical research on ramie harvesting mechanization technology is very backward. This article fills the gap in the research on the basic physical and mechanical properties of ramie, and also advances the process of applying simulation technology in the field of ramie harvesting.Ramie is prone to breakage during harvesting and baling, and the flexible ramie fibres can easily become entangled with the mechanism, seriously affecting the overall work quality and efficiency of the equipment 17 , 18 . The combination of material tests and simulation tests to analyze the bending mechanical properties of the stalks, establish a standard ramie stalk finite element model, these works can improve the reliability of subsequent simulation studies, provide a theoretical basis for the design and improvement of harvesting equipment.As shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Bending mechanics test and parameters calibration of ramie stalks

Zhang

Huang

et al. 2023

Sci Rep

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Research and development of ramie harvesting equipment is a key link to revitalize ramie industry, problems such as the tendency of stalks to tangle and clog the machine are very problematic, seriously affect the quality and fluency of the harvester. The structure of ramie stalk is complex, and the mechanical properties of each component vary greatly, collision between stalk and machine creates complex stress relationship. By building a finite element model, it is possible to analyze the stress state of the stalk during bending from a microscopic perspective, and to analyze the complex stress–strain situation within the stalk. The purpose of this paper is to establish a standard ramie stalk bending finite element model to provide a theoretical basis for the subsequent kinematics and dynamics. Firstly, material experiments were carried out on ramie straw. The structural and mechanical parameters of the straw components were obtained through measurement and calculation tests, and the force–deformation curves for straw bending were obtained. Bending finite element simulations were carried out on the basis of mechanical tests, and the parameters such as dynamic friction coefficient, wood Poisson's ratio and bast Poisson's ratio were determined by the central combination design. Then established an accurate bending finite element simulation model of ramie stalk, the accuracy of the model was verified at the end. In this paper, the key parameters of the ramie stalk model were calibrated through a combination of material tests and simulations. All parameters of the ramie stalk model were finally obtained, and the bending mechanical properties of the ramie stalk were analysed by applying finite element analysis. This bending mechanics simulation model can be used for kinematic and dynamics simulation analysis of conveying and baling to provide a theoretical basis for the structural design of the harvester. The methods explored here can be applied to other slender straw crops.

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Ergonomic Design of Cab Structure for Wheeled Combine Harvester

Cited by 2 publications

References 19 publications

Design and Parameter Optimization of Conveying and Baling Devices for Ramie Cutting and Baling Machine

Design and Parameter Optimization of Conveying and Baling Devices for Ramie Cutting and Baling Machine

Bending mechanics test and parameters calibration of ramie stalks

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