| Thoroughbred breeding and popularization is one of the important means of agricultural increase production,providing the suitable plot seeder for breeding staff can shorten the breeding cycle and improve the accuracy of crop breeding,which is of great importance significance to the increasement of China's grain production.The study is completed with the support of the national modern agriculture industry technology system research "Soybean production facilities and equipment special fund project"(nycytx-004).On the basis of in-depth study of soybean plot breeding agronomic requirements,launches the research about the precision seeder for plot-soybean breeding and the related key parts by the methods of the theoretical analysis,ADAMS simulation analysis,finite element engineering analysis and experimental research investigation,the main research contents are as follows:(1)In order to satisfy following requirements of sub-district seeding without hybrid and another convenient,solve the bigger idle running and incomplete seed-clearing,the pre filling seed-clearing institution form of curved arc for the insert-metering device was designed.The theoretical analysis was used to determine the basic parameters of the arc rack and the decreasing coefficient for the fore and aft tooth addendum,and the results of the gear mesh with arc rack simulation based on ADAMS software showed that the design met the requirements.The soybean Suinong 26 was selected as experimental material,performance comparisons test results of the suction drum-type seed metering system before and after improvement showed that,the idle running of the improved insert-metering system was within 0.42 m and quickly insertion and extraction to accomplish another without hybrid which met the design requirements,laid a solid foundation on the development of the series of soybean breeding seeder.(2)The design adopts the technology of virtual prototyping with the Solidworks software,created the model of the 2BXJ-4A1 precision spaced seeder,and applied ANSYS17.0 finite element analysis software for finite element analysis of the hang main frame and modal analysis of the unit frame,the analysis results show that the design of the hang main frame in the 60 cm,65 cm,70 cm from the three kinds of row spacing for the monomer articulated way can meet the requirements of the strength of the actual operation,and monomer frame will not apper the resonance phenomenon in the working process.(3)The performance reliability of 2BXJ-4A1 precision spaced seeder was tested according to?Single(Precision)Method of Drill?,the result indicated that the performance index of seeder meter can reach the first-class standard of ? Quality Classification of Precision Seeder for Inter-cultivation Crop?,satisfied the agricultural technology requirement and agronomic demands of the soybean plots breeding experiment,and the seeder had stabal working property,reliable transmission,and the adjustable range of planting distance can also meet the requirements of breeding and uniform sowing,consistent sowing depth.(4)For the seed-clearing and another frequently in the prototype plot breeding test,air suction type automatic cleaning system was designed,with the single chip microcomputer as the control unit for the design of control system,by the key operation of electric control valve open and closed for cleaning,and design the the validation test about the setting seed-clearing time,after debugging the system can realize automatic clearing completely,improve the efficiency of the seed-clearing operation,provides research foundation on the designed of the follow-up full automatic design. |
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