Development of cleaning systems for combine harvesters: A review

Liang, Zhenwei; Wada, Million Eyasu

doi:10.1016/j.biosystemseng.2023.10.018

Cited by 14 publications

(3 citation statements)

References 74 publications

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“…With the increase in the airflow pressure, when the airflow pressure drop is equal to the weight of the screened material (mg), the screened material tends to fluidize; that is, the screened material has a tendency to leave the screen surface. For the force analysis of the screened material, in this state, there are: F 3 = force of air flow on the threshed mixture on sieve, N; F 4 = the buoyancy of the threshed mixture, N; G 2 = the gravity of the threshed mixture, N; ∆P = the pressure difference of the airflow on both sides of the sieve surface, Pa; ρ 2 = density of gas, kg/m 3 ; ρ 3 = density of the threshed mixture, kg/m 3 ; L = the thickness of the threshed mixture, m; A = the cross-sectional area facing the airflow, m 2 ; ε = the porosity of the threshed mixture, %; V = volume of the threshed mixture, m 3 . The force on the threshed mixture on sieve is shown in Figure 3.…”

Section: The Requirements Of the Cleaning Process On The Airflow Fieldmentioning

confidence: 99%

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Research and Experiment on Airflow Field Control Technology of Harvester Cleaning System Based on Load Distribution

Li,

He,

Yue

et al. 2024

Agriculture

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The wind sieve cleaner is widely used in the screening system of combine harvesters due to its compact structure and efficient screening capability. In order to study more deeply the feeding load distribution of the combine harvester and the influence of the airflow field on the clearing effect, a mechanical analysis method was adopted to analyze the dynamics of the material in the inclined airflow, and a kinetic model was established. At the same time, the motion state of the material in the airflow field was explored, and combined with the actual orthogonal test, the response surface model of factors and indicators was established. Experimental validation was carried out. It provides an important research foundation and theoretical basis for optimizing the structural parameters of the screening system and improving its operational performance.

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Section: The Requirements Of the Cleaning Process On The Airflow Fieldmentioning

confidence: 99%

“…The cleaning device is an important part of the grain harvester [1][2][3]. Its working performance has a great influence on the cleaning effect and loss of the harvester.…”

Section: Introductionmentioning

confidence: 99%

Research and Experiment on Airflow Field Control Technology of Harvester Cleaning System Based on Load Distribution

Li,

He,

Yue

et al. 2024

Agriculture

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“…Combine harvesters, renowned as one of the most intricate agricultural machinery types, seamlessly integrate a multitude of functions encompassing cutting, conveying, threshing, cleaning, and collecting [1,2]. Their pivotal role in crop production is indisputable, significantly elevating agricultural productivity.…”

Section: Introductionmentioning

confidence: 99%

Establishment of a Feeding Rate Prediction Model for Combine Harvesters

Liang,

Qin,

2024

Agriculture

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Feeding rates serve as a vital indicator for adjusting the working parameters of the combine harvester. A non-invasive diagnostic approach to predicting the feed rates of combine harvesters by collecting vibration signals of the inclined conveyor was introduced in this study. To establish a feed rate prediction model, the correlation between feeding rates and vibration signal characteristics was investigated. Vibration signal characteristics in both the time domain and frequency domain were also analyzed in detail. The RMS (root mean square) value and the total RMS value of the one-third octave extracted from the vibration signal were utilized to establish a feed rate prediction model, and field tests were conducted to verify the model performance. The experimental results indicated that the relative errors of the established model range from 3.1% to 4.9% when harvesting rice. With the developed feed rate prediction system, the control system of the combine harvester can acquire feed rate information in real time, and the working parameters can be adjusted in advance, thereby, it can be expected to greatly enhance the working performance of the combine harvesters.

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