Design of Intelligent Header for Longitudinal Axial Flow Corn Combine Harvester

The threshing gap of the thresher device for rice combine harvester has to be adjusted in real time based on different feed rates to ensure the operation efficiency in the harvesting process. However, adjusting the threshing gap by changing the position of concave grid may result in unevenness of threshing gap of the thresher device and further impact on the fluidity of material in the thresher device; in addition, it is also unavailable to adjust the threshing gap by changing the drum diameter when the rice combine harvester is in operation. In view of the above and based on axial flow threshing drum, the design of a variable-diameter threshing drum available for overall and rapid drum diameter adjustment and the research on diameter adjustment device as well as electronic control self-locking device were introduced in this study. Besides, stress analysis was implemented to the diameter adjustment device to ensure the stability of the variable-diameter threshing drum. Field experiment was implemented to identify the difference between the impacts brought to the threshing performance (grain-entrainment loss rate, damage rate, threshing efficiency, and threshing power consumption) by both methods for threshing gap adjustment. The experiment result shows that the drum adjustment method with variable-diameter drum features higher grain-entrainment loss rate, threshing efficiency, and threshing power consumption, yet stable in terms of consumption fluctuation, but a lower damage rate than their counterparts with concave adjustment method.

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Harvesting Lupinus albus axial rotary combine harvesters

Research in Agricultural Engineering ◽

10.17221/107/2017-rae ◽

2018 ◽

Vol 64 (No. 4) ◽

pp. 209-214 ◽

Cited By ~ 7

Author(s):

Nikolay Aldoshin ◽

Otari Didmanidze

Keyword(s):

Lupinus Albus ◽

Seed Mass ◽

Axial Flow ◽

Plant Protein ◽

Rotor Speed ◽

Technological Parameters ◽

White Lupine ◽

Combine Harvester ◽

Leguminous Crops ◽

Combine Harvesters

To ensure the agricultural production of the plant protein, it is advisable to cultivate leguminous crops, such as white lupine (Lupinus albus), which are rich in plant protein. White lupine is an easily threshed crop. Its seeds are large enough, so the main problem is to avoid seed damage during harvesting. To improve the harvesting technology of white lupine, the authors suggest using grain combine harvesters with axial flow threshing and separating mechanism (TSM). They consider it necessary to modify the design of such combine harvesters to eliminate repeated threshing of a grain (seed) mass and decrease threshing intensity in a threshing separating mechanism. The authors have also provided grounds for technological parameters of a combine harvester – a rotor speed and a concave clearance. The recommended rotor speed should be approximately 350–400 min<sup>–1</sup> and the concave clearance should be 40 mm.

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Systematic Planning and Design of a System to Facilitate the Adjustment of Grain Transport Vanes in a Combine Harvester

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.918.89 ◽

2014 ◽

Vol 918 ◽

pp. 89-94

Author(s):

Marco A. de Carvalho ◽

Felipe B. Ramina

Keyword(s):

Conceptual Design ◽

Systematic Approach ◽

Axial Flow ◽

Detailed Design ◽

Product Planning ◽

Planning And Design ◽

Systematic Planning ◽

Combine Harvester ◽

Combine Harvesters

This paper describes the design of a system to facilitate the adjustment of grain transport vanes in Axial-Flow® combine harvesters produced by Case New Holland (CNH). The goal was to develop a mechanism that allowed quick and convenient setup and was at the same time simple, effective and inexpensive. The systematic approach to product planning and design was used. The results of market and patents researches conducted are reported, as well as task clarification, conceptual design, embodiment and detailed design of the system. The conceived system allowed a 80% reduction of time spent in grain transport vane adjustment. Its implementation is planned to be conducted by CNH.

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Performance Assessment of a Self-propelled Paddy Grain Thresher under Different Threshing Functional Parameters

Applied Engineering in Agriculture ◽

10.13031/aea.13585 ◽

2020 ◽

Vol 36 (2) ◽

pp. 141-149

Author(s):

George Ashwehmbom LOOH ◽

Fondzenyuy Cedric MANGEH (III) ◽

Xunwei WANG ◽

Xiushan WANG

Keyword(s):

Response Surface ◽

Feed Rate ◽

Axial Flow ◽

Operating Parameters ◽

Performance Parameters ◽

Functional Parameters ◽

Machine Performance ◽

Grain Damage ◽

Combine Harvester ◽

Present Response

HighlightsThis research was aimed at assessing the performance of a self-propelled paddy grain thresher.Increasing cylinder speed increased the threshing percentage and percentage of broken grains of the machine.More broken grains were obtained at a lower concave clearance.The feed rate did not have much significance on the performance parameters that were evaluated. Abstract.This research was conducted to assess the performance of a self-propelled mini combine harvester, model number 4LZ-0.8 under different threshing functional parameters such as cylinder speed, concave clearance, and feed rate. An indoor experiment was conducted using the mini combine with an axial flow threshing cylinder and tangential feeding of material. These functional parameters were set at 5 levels each. The responses were obtained in terms of threshing percentage, percentage of unthreshed grains and percentage of broken grains. Response values were analyzed using the response surface tool (rstool) in MATLAB. Analysis of variance was done to determine the significant effects of the factor variations on the response values. MATLAB was used to present response surface graphs that were used to describe the variations of the responses as the factors changed from one level to the other. Results showed that with an increase in cylinder speed from 697 to 1202 rpm, the percentage of broken grains increased significantly from 0.0384% to 3.4052%, respectively. At cylinder speeds of 697 and 1202 rpm, the percentage of unthreshed grains increased from 0.1515% to 0.2162%, respectively. Furthermore, an increase in feed rate decreased the threshing percentage. The highest threshing percentage was obtained at an average concave clearance of 27 mm. Furthermore, it was realized that increasing the concave clearance from 18 to 35 mm, equally increased the percentage of unthreshed grains from 0.1478% to 0.3177%. The percentage of grain damage decreased from 3.2758% to 0.0268% with an increase in concave clearance from 18 to 35 mm, respectively. From the results obtained, it was tested and suggested that operating the threshing cylinder at a cylinder speed of 1100 rpm, concave clearance of 27 mm and feed rate of 0.9 kg s-1 offered the best machine performance. At these suggested values of the operating parameters, the threshing percentage was 99.9801%, the percentage of broken grains was 0.0134%, and the percentage of unthreshed grains was 0.0199%. Keywords: Assessment, Axial threshing unit, Cylinder speed, Concave clearance, Feed rate, Functional parameters, Threshing percentage.

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Design of Longitudinal Axial Flow Threshing and Separating Device of Maize Grain Combine Harvester

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.863.251 ◽

2017 ◽

Vol 863 ◽

pp. 251-254

Author(s):

Kun Zhang ◽

Shu Kun Cao ◽

Xiu Sheng Chen ◽

Chong Cao ◽

Chang Zhong Wu

Keyword(s):

Feeding Rate ◽

Axial Flow ◽

Development Trend ◽

Damage Rate ◽

Modern Maize ◽

Cleaning Device ◽

Spiral Blade ◽

Combine Harvester ◽

Maize Grain ◽

The Development Trend

Harvesting grain directly has been the development trend of modern maize combine harvester. To satisfy the demand of harvesting grain straightly type maize combine harvester for large feeding rate, low damage rate, high threshing rate, the longitudinal axial flow threshing and separating device was designed. It could also increase the separating rate of grain and miscellaneous, and reduce the burden of cleaning device. Threshing gap was adjustable in the range of 30 to 60mm, which reduced the incidence of jam faults effectively in the threshing process. Spiral blade on feeder, threshing rasp-bar and separating nail were replaceable, which improved the efficiency for threshing and separating.

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