Effects of crop-machine variables on paddy grain damage during handling with an inclined screw auger

Zareiforoush, Hemad; Komarizadeh, M.H.; Alizadeh, Mohammad

doi:10.1016/j.biosystemseng.2010.02.008

Cited by 35 publications

(18 citation statements)

References 14 publications

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“…The typical kind of grain harvester is a combine which integrates the harvesting processes such as gathering, cutting, threshing, separation and cleaning, etc., especially threshing is its most important function [8] . Furthermore, grain loss and damage in harvesting are significantly affected by threshing performances [9][10][11][12] . Hence, many researchers put their efforts to investigate grain-threshing devices, and different kinds of grain threshers or threshing components have been developed since 1820s [13][14][15][16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

Review of grain threshing theory and technology

Chen

Han

et al. 2018

International Journal of Agricultural and Biological Engineering

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Threshing is the most important function of grain harvester. Grain loss and damage in harvesting are significantly related to threshing theory and technology. There are four kinds of threshing principles including impact, rubbing, combing and grinding. Four types of contact models between grain and threshing components have been constructed correspondently. Grain damage can be regarded as a function of peripheral velocity and contact pattern of impacting. Grain loss can be regarded as a function of contact pattern of rasp bars. Grain loss coming from cleaning and separation in the subsequent process of combing threshing was significantly decreased. Tangential and axial threshing technologies have been applied in grain threshing system widely. It showed that in the combined application, tangential rolls are used to accelerate grain flow, and axial rolls are used to increase threshing quality especially lower loss and damage. Conical concave may take the place of the traditional cylindrical one. With the development of sensor technology and communication technology, intelligent harvesting robot and automatic threshing system will be integrated together to improve grain quality and operation comfort.

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Section: Introductionmentioning

confidence: 99%

Review of grain threshing theory and technology

Chen

Han

et al. 2018

International Journal of Agricultural and Biological Engineering

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“…The evaluated rice variety, Hashemi, is one of the common varieties of rice in north of Iran [26]. This variety is categorized as long kernel rice according to the standard provided by the Institute of Standards and Industrial Research of Iran (ISIRI, 2012).…”

Section: Sample Preparationsmentioning

confidence: 99%

A hybrid intelligent approach based on computer vision and fuzzy logic for quality measurement of milled rice

Zareiforoush

Minaei

Alizadeh³

et al. 2015

Measurement

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“…Similarly, the inertia force of the processed medium and its moment relative to the axis of rotation is defined, taking into account the medium motion along the deformed screw . 2 .…”

Section: Formulation Of the Problemmentioning

confidence: 99%

“…Analysis of the last researches and publications. The conducted analysis of the state of the modern technologies and literary-patent search of constructions of cars and mechanisms for realization of transporting of friable materials [1][2][3] has showed that in one or another measure they satisfy considerable part of requirements which are pulled out to them , however most constructions of working of working parts of conveyers carry out not only the forward axial moving of material but also implementation of circulating motion, that reduces productivity of such mechanisms. They have a simple construction maximum, differ in acompactness and they are reliable in exploitation.…”

Section: Introductionmentioning

confidence: 99%

Torsional oscillations of an auger multifunctional conveyor’s screw working body with consideration of the dynamics of a processed medium continuous flow

Ляшук¹,

Вовк²,

Tson³

et al. 2018

Ukr. food j.

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Keywords: Screw Amplitude Resonance ConveyorIntroduction. The aim of the article is a mathematical model of vibrations of working part of screw conveyer for transporting friable loads taking into account the changes of closeness of the processed environment, speed of circulation of screw, weight while appearing of the phenomenon of resonance. Materials and methods. It is recesrced the turning vibrations of spiral working part of screw multifunctional conveyer, which appeare as a result of action of processing environment. The recerch was carried out by mathematical modelling method.Results and discussions. The limiting factors which complicate a design are the unevenness of the division of environment along the length of screw; a body makes flexible vibrations; the motion of the processed environment along the working screw causes the small vibrations of bend, causes appearance of "additional forces". For providing the authenticity of mathematical model ti has been introduced the next suppositions: the working part of screw is turned with the permanent angle speed around its longitudinal which in the undeformed position coincides coincides with an axis OX; the transversal transferring of neutral axis of working screw at the arbitrary moment in perpendicular direction of its undeformed position is determined by the vector (in relation to the fixed frame of reference of OXYZ); the continuous stream of processed environment,while its weight changes on unit length slowly along a screw and moves with permanent relative (in relation to working screw) speed.A mathematical model takes into account the limitation and supposition for the existent screw conveyer with the length of 2,5 and 3 m, which is used for moving the friable loads with the consistence of 10, 20, 40 kg/m. The alternative parameters are the length of the screw,the consistence of the processed environment, the speed of circulation ofthe screw , weightOn the basis of model the dependences of amplitude of vibrations on the lengthof screw , cosistence of the processed environment, the speed of circulation of the screw, weight are built.Conclusions. A mathematical model allows to improve the process of development and designing of the screw conveyers of the friable loads providing the reliability of process of transportion and system "the processed environment -the screw working part".

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Effects of crop-machine variables on paddy grain damage during handling with an inclined screw auger

Cited by 35 publications

References 14 publications

Review of grain threshing theory and technology

Review of grain threshing theory and technology

A hybrid intelligent approach based on computer vision and fuzzy logic for quality measurement of milled rice

Torsional oscillations of an auger multifunctional conveyor’s screw working body with consideration of the dynamics of a processed medium continuous flow

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