Variable-Diameter Drum with Concentric Threshing Gap and Performance Comparison Experiment
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 th...
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doaj-d037f9ae894d4367a5bda23c8582c0c92020-11-25T03:12:33ZengMDPI AGApplied Sciences2076-34172020-08-01105386538610.3390/app10155386Variable-Diameter Drum with Concentric Threshing Gap and Performance Comparison ExperimentYaoming Li0Zhan Su1Zhenwei Liang2Yu Li3Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, ChinaKey Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, ChinaKey Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, ChinaKey Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, ChinaThe 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.https://www.mdpi.com/2076-3417/10/15/5386combine harvestervariable-diameter threshing drumthreshing gapfield experimentthreshing performance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yaoming Li Zhan Su Zhenwei Liang Yu Li |
spellingShingle |
Yaoming Li Zhan Su Zhenwei Liang Yu Li Variable-Diameter Drum with Concentric Threshing Gap and Performance Comparison Experiment Applied Sciences combine harvester variable-diameter threshing drum threshing gap field experiment threshing performance |
author_facet |
Yaoming Li Zhan Su Zhenwei Liang Yu Li |
author_sort |
Yaoming Li |
title |
Variable-Diameter Drum with Concentric Threshing Gap and Performance Comparison Experiment |
title_short |
Variable-Diameter Drum with Concentric Threshing Gap and Performance Comparison Experiment |
title_full |
Variable-Diameter Drum with Concentric Threshing Gap and Performance Comparison Experiment |
title_fullStr |
Variable-Diameter Drum with Concentric Threshing Gap and Performance Comparison Experiment |
title_full_unstemmed |
Variable-Diameter Drum with Concentric Threshing Gap and Performance Comparison Experiment |
title_sort |
variable-diameter drum with concentric threshing gap and performance comparison experiment |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2020-08-01 |
description |
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. |
topic |
combine harvester variable-diameter threshing drum threshing gap field experiment threshing performance |
url |
https://www.mdpi.com/2076-3417/10/15/5386 |
work_keys_str_mv |
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