Research and Experiment on Variable-Diameter Threshing Drum with Movable Radial Plates for Combine Harvester
In order to solve the problem of the threshing performance of a large combine harvester being reduced due to the non-adjustable diameter of the threshing drum, a variable-diameter threshing drum with movable radial plates based on the principle of concentric regulation was studied. It was mainly com...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/13/8/1487 |
| _version_ | 1797585911067705344 |
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| author | Fazheng Wang Yanbin Liu Yaoming Li Kuizhou Ji |
| author_facet | Fazheng Wang Yanbin Liu Yaoming Li Kuizhou Ji |
| author_sort | Fazheng Wang |
| collection | DOAJ |
| description | In order to solve the problem of the threshing performance of a large combine harvester being reduced due to the non-adjustable diameter of the threshing drum, a variable-diameter threshing drum with movable radial plates based on the principle of concentric regulation was studied. It was mainly composed of a mechanism for adjusting the diameter by moving the radial plates, six fixed threshing tooth rods, six retractable threshing tooth rods and the single piston rod hollow hydraulic cylinder. The threshing gap can be adjusted by a stepless change of the drum diameter. By using RecurDyn simulation and field performance tests, the adjustable ranges of diameter and gap of the movable variable-diameter threshing drum were 670~710 mm and 10~30 mm. Based on the feed amount of the combine, the rotation speed of the threshing drum and the threshing gap (the diameter of the drum) as the influencing parameters, and the grain entrainment loss rate, grain un-threshed rate and grain breakage rate as the evaluation indexes, the three-factor and three-level response surface tests were carried out, and the result data were analyzed using Design-Expert 13.0. The optimal threshing gap and rotation speed of the threshing drum were determined under different feeding quantities. A comparative test was carried out to adjust and fix the threshing gap and rotation speed of the threshing drum in real time according to the change in feeding amount. The results showed that when the working parameter combination under different feeding amounts was adjusted in real time, the entrainment loss rate was 0.65%, the un-threshed rate was 0.063% and the breakage rate was 0.47%. Compared with the threshing gap and the rotation speed of the threshing drum being fixed, the entrainment loss rate, the un-threshed rate and the breakage rate were reduced by 44.9%, 27.6% and 34.1%, respectively. A threshing drum with variable diameter was provided for a large multi-crop harvesting combine to realize the concentric stepless adjustment of the threshing gap. |
| first_indexed | 2024-03-11T00:12:53Z |
| format | Article |
| id | doaj.art-c719ded3aafd4767a0e9a1f5d6530346 |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-11T00:12:53Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-c719ded3aafd4767a0e9a1f5d65303462023-11-18T23:50:48ZengMDPI AGAgriculture2077-04722023-07-01138148710.3390/agriculture13081487Research and Experiment on Variable-Diameter Threshing Drum with Movable Radial Plates for Combine HarvesterFazheng Wang0Yanbin Liu1Yaoming Li2Kuizhou Ji3School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaIn order to solve the problem of the threshing performance of a large combine harvester being reduced due to the non-adjustable diameter of the threshing drum, a variable-diameter threshing drum with movable radial plates based on the principle of concentric regulation was studied. It was mainly composed of a mechanism for adjusting the diameter by moving the radial plates, six fixed threshing tooth rods, six retractable threshing tooth rods and the single piston rod hollow hydraulic cylinder. The threshing gap can be adjusted by a stepless change of the drum diameter. By using RecurDyn simulation and field performance tests, the adjustable ranges of diameter and gap of the movable variable-diameter threshing drum were 670~710 mm and 10~30 mm. Based on the feed amount of the combine, the rotation speed of the threshing drum and the threshing gap (the diameter of the drum) as the influencing parameters, and the grain entrainment loss rate, grain un-threshed rate and grain breakage rate as the evaluation indexes, the three-factor and three-level response surface tests were carried out, and the result data were analyzed using Design-Expert 13.0. The optimal threshing gap and rotation speed of the threshing drum were determined under different feeding quantities. A comparative test was carried out to adjust and fix the threshing gap and rotation speed of the threshing drum in real time according to the change in feeding amount. The results showed that when the working parameter combination under different feeding amounts was adjusted in real time, the entrainment loss rate was 0.65%, the un-threshed rate was 0.063% and the breakage rate was 0.47%. Compared with the threshing gap and the rotation speed of the threshing drum being fixed, the entrainment loss rate, the un-threshed rate and the breakage rate were reduced by 44.9%, 27.6% and 34.1%, respectively. A threshing drum with variable diameter was provided for a large multi-crop harvesting combine to realize the concentric stepless adjustment of the threshing gap.https://www.mdpi.com/2077-0472/13/8/1487variable-diameter threshing drummovable radial platesthreshing gaprotation speed of the threshing drumfeed quantityresponse surface test |
| spellingShingle | Fazheng Wang Yanbin Liu Yaoming Li Kuizhou Ji Research and Experiment on Variable-Diameter Threshing Drum with Movable Radial Plates for Combine Harvester Agriculture variable-diameter threshing drum movable radial plates threshing gap rotation speed of the threshing drum feed quantity response surface test |
| title | Research and Experiment on Variable-Diameter Threshing Drum with Movable Radial Plates for Combine Harvester |
| title_full | Research and Experiment on Variable-Diameter Threshing Drum with Movable Radial Plates for Combine Harvester |
| title_fullStr | Research and Experiment on Variable-Diameter Threshing Drum with Movable Radial Plates for Combine Harvester |
| title_full_unstemmed | Research and Experiment on Variable-Diameter Threshing Drum with Movable Radial Plates for Combine Harvester |
| title_short | Research and Experiment on Variable-Diameter Threshing Drum with Movable Radial Plates for Combine Harvester |
| title_sort | research and experiment on variable diameter threshing drum with movable radial plates for combine harvester |
| topic | variable-diameter threshing drum movable radial plates threshing gap rotation speed of the threshing drum feed quantity response surface test |
| url | https://www.mdpi.com/2077-0472/13/8/1487 |
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