Research On Bulbus Fritillariae Ussuriensis Harvester

Bulbus fritillariae ussuriensis is a kind of medicinal fritillaria,and its underground bulbs contain alkaloids,which have the same effect as Sichuan bulb of fritillary.The artificially cultivated bulbus fritillariae ussuriensis is concentrated in Changbai Mountain,Zhangguangcai Mountainx,Wanda Mountain,Lesser khingan mountains and other areas,and the planting area is large.In the production process of bulbus fritillariae ussuriensis,the harvesting link directly affects the quality and economic benefits of bulbus fritillariae ussuriensis.In order to expand the scale of scallop cultivation and improve the economic benefits of growers,it is necessary to realize the scale,standardization and mechanization of production.However,the bulbus fritillariae ussuriensis harvesting machinery being used by growers has problems such as low working efficiency,poor adaptability,poor separation of shellfish soil,and high damage rate of bulbus fritillariae ussuriensis.In addition,the existing bulbus fritillariae ussuriensis harvesting machinery is not aimed at the entire harvesting process,but at a certain point in the harvesting process.The harvesting process still requires a large number of manual connections,which consumes a lot of time and labor,which is not conducive to improving the mechanized production of bulbus fritillariae ussuriensis.To this end,this article develops a bulbus fritillariae ussuriensis harvester,which designs and optimizes its key components,and performs field experiments on the whole machine.(1)Through field survey of bulbus fritillariae ussuriensis planting base,the advantages and disadvantages of Pingbei harvesting process and existing harvesting equipment were obtained,and the design plan of the whole machine was determined.(2)Use SolidWorks software to design the bulbus fritillariae ussuriensis harvester.The bulbus fritillariae ussuriensis harvester is composed of a traction module,a feeding module and a screening module.Each module is relatively independent and is conducive to subsequent local upgrade and maintenance.Through the virtual prototype,the working principle and transmission method of bulbus fritillariae ussuriensis harvester are verified,which shortens the development cycle and reduces the development cost.(3)Design the key parts of the whole machine Design the fixed digging shovel to determine the angle of the digging shovel and the angle of the shovel blade;design the lifting chain to determine the inclination and linear velocity of the lifting chain;perform a motion analysis on the screening site to determine the sieve and siphon The conditions of traveling,descending,and beating on the network are used to simulate the trajectory of the screen;the eccentric wheel with the greatest impact on the screening performance is optimized,and the angular velocity of the eccentric wheel is determined to be 340r/min and the eccentric distance is 20mm;The fatigue analysis of the connecting rod ensures the reliability and safety during the operation of the whole machine.(4)The whole machine is subjected to field experiments to verify the working performance of the whole machine and determine the optimal parameter combination.Taking the digging depth of the harvester,the inclination of the screen,and the running speed as independent variables,the central combination design method was used to study the effects of the respective variables and their interactions on the harvest loss rate and damage rate.The optimal working parameters were calculated by the response surface optimization method:the digging depth was 87.14 mm,the screen inclination angle was 9°,and the travel speed was 3.35 m/s.Under this working condition,the actual loss rate of Pingbei is 1.73%,and the damage rate is 1.70%,which meets the established design requirements.