丘陵山区油菜捡拾机复筛装置设计与试验OA

[Objective]A conical sieve re-cleaning device was designed for a rape pick-up harvester operating in hilly and mountainous areas to reduce the labor consumption in manual re-cleaning process.[Method]The range of structure and operation parameters of screening device were determined through kinematics and dynamic analysis.Combined with the self-made test bench,the diameter of the sieve hole,the screw pitch of spiral blade,and the rotating speed of conical sieve were taken as the factors to obtain optimal parameter values through sin-gle-factor and orthogonal test,taking the loss rate and cleaning rate as the indexes.[Result]From the orthogonal test,the cleaning performance was optimal when the diameter of the sieve hole was 5 mm,the proper screw pitch of spiral blade was 160 mm,and the rotating speed of conical sieve was 75 r·min-1,respectively.The optimal loss rate and cleaning rate were 0.24%and 98.49%,respectively.Compared with the performance of the air cleaning device without re-cleaning device,the cleaning rate was improved by 8.31%.Under the optimal parameter com-bination,the cleaning rate and loss rate of the re-cleaning device in the field experiment were 96.12%and 1.24%.[Conclusion]This research could provide a reference for the design and optimization of cleaning device for mechanized harvesting equipment of rape in hilly and mountainous areas.