Capacity Increase of Cleaning Units by Circular Oscillation

Rothaug, Sven; Wacker, Peter; Yin, Wen; Kutzbachi, H.D.

doi:10.13031/2013.15173

Cited by 3 publications

(2 citation statements)

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“…The analysis of literature [8][9][10][11][12][13][14][15] showed that the currently used constructions of cleaning systems in the majority of combine harvesters are equipped with a conventional aerodynamic sieve separation system with a centrifugal fan. According to the research on combine harvesters in mountainous and foothill areas a large majority of losses and worse quality of grain result from the incorrect operation of the cleaning system.…”

Section: Introductionmentioning

confidence: 99%

Innovative aerodynamic grain separation system for plant harvesting in sloped areas: problems, research and optimization of parameters

Bieniek

Komarnicki

Detyna

2021

Archiv.Civ.Mech.Eng

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This article presents the main problems associated with cereal harvesting in sloping areas. The presented innovative aerodynamic system supporting the separating unit of combine harvester can be one of the ways to counteract the negative effects of harvesting machines work on slopes. The Monte Carlo numerical method, presented in this article, was applied in the optimization of an aerodynamic sieve separation process on an inclined terrain. The given variables are the transverse slope of separator α (of the sieve), longitudinal slope β and the output of the main and side fans. The Monte Carlo method makes it possible to determine an optimized set of parameters (α = 10°, β = 2.8°, δ = 9°), the output of the main fan (0.67 m3 s−1) and the output of the side fan (1.86 m3 s−1), allowing to obtain the best indicator values of 2.1% grain loss and 97.5% grain purity.

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Section: Introductionmentioning

confidence: 99%

Innovative aerodynamic grain separation system for plant harvesting in sloped areas: problems, research and optimization of parameters

Bieniek

Komarnicki

Detyna

2021

Archiv.Civ.Mech.Eng

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“…In order to improve the cleaning quality of a combine harvester, Hubner [10] designed a rotary cleaning unit, and Rothaug et al [11] invented a circular oscillating grain-cleaning unit and compared it with a standard linear oscillating cleaning section. Ren et al [12] analyzed the two-phase flow law of air and debris particles in the threshing cleaning diverter by employing the two-phase flow mechanics theory, and the kinematic differential equation of debris particle flow was established.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Cleaning Performance of Hot Air Flow Cleaning Device

Zhang,

Li,

You

2023

Agriculture

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When processing wet rice, the efficiency of the combine harvester diminishes due to the heightened surface water content of the paddy. To address this, a hot air flow cleaning apparatus was engineered, and the effects of its operational parameters on cleaning performance were investigated. Outlet temperature, fan speed, louver sieve temperature, louver sieve inclination, and eccentric wheel speed were selected as experimental factors, and a single-factor test was carried out, with cleaning loss rate and impurity rate as test indexes. The results of the single-factor test show that louver sieve inclination and eccentric wheel speed had no obvious influence on the cleaning loss rate or impurity rate. The cleaning loss rate decreased with the increase in outlet temperature and louver sieve temperature but increased with the increase in fan speed. The cleaning impurity rate increased with the increase in outlet temperature and louver sieve temperature but decreased with the increase in fan speed. Based on the results of the single-factor test, a central composite rotatable test was adopted to attain the optimal operation parameters of the hot air flow cleaning equipment. Parameters like outlet temperature, fan speed, and louver sieve temperature were established as test factors, with the loss and impurity rates chosen as the evaluation metrics. Optimization using response surface methodology yielded the following parameters: an outlet temperature of 40.7 °C, a fan speed of 1300 rpm, and a louver sieve temperature of 50 °C. Under these conditions, the loss rate was observed to be 0.75% and the impurity rate stood at 1.75%. These findings can guide the design of cleaning mechanisms and the determination of operational parameters.

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