Research On Cylinder Precision Tomato Seeder Based On The Pneumatic Suspension Seed Supply

Processing tomato is the main economic crops in Xinjiang，However, to some extent the specialgeographical environment of Xinjiang restricts the further expansion of processing tomato planting area.The seedling transplanting is the main mode of processing tomato efficient cultivation, Seedling planting isone of the key aspects of seedling transplanting. In view of the existing seedling planter have a highempty-seed rate, less single-seed rate. It is difficult to meet the small size, irregular shape, poor mobility ofprocessing tomato seed "a hole grain" precision sowing technical requirements, From improving theliquidity and the Spatial location postural stability at the Seed adsorption instantaneous, Proposing a newideas for blowing species, Creating a cylinder precision seeder based on the pneumatic suspension seedsupply. The main research contents and results are as follows:1. The material properties of tomato seeds: In this paper, the Xinjiang common tomato variety87-5geometrical size were measured and tested, the mean length is3.46mm, the mean width is2.43mm, themean hight is0.77mm,1000-grain weight is3.10g, porosity rate is0.524, rest angle is410, on the0rganicglass sliding friction angle is260. Theoretical calculation of suspension speed is3.7m/s, experimentallysuspension speed is within the scope of3.5-5m/s, consistent with the theoretical calculation results.2. Research on architecture design of the blowing gas chamber: According to the seeds providing wayresearch of domestic and foreign seedling planter, This paper proposes a new scheme based on gas blowingtype, the internal flow mathematical model of seed box chamber was studied. The orthogonal numericalsimulation experiments about three kinds of gas chamber structure in the shape of different heights,different width and different inlet velocity are designed. Finding out the influence rules about boxchamber various factors to outlet flow field uniformity and inlet velocity is10m/s, chamber width is13mm, the trapezoidal shape of the structure of the gas chamber, the chamber height is30mm.3. Research on architecture design of the precision seedling-machine based on the pneumatic suspensionseed supply device: The chapter mainly expounds the working principle and seeds providing process. Thekey parts are particular analyzed such as roller-type seeder、seed metering plate、seed box and transmission.Finally, Force diagram of seed in absorbing phase was analyzed to determine the parameters of the gasblowing suspended systems (such as pneumatic parameters,board mounting position, the horizontal angle,roller speed, etc.) and their interactions on roller-type tomato seeder influence of adsorption performance.4. Experimental Study on seeding: Building a nursery sowing drum test rig based on these studies,Identifying three factors and four levels orthogonal test according to repeated tests. The test results weresolved using variance analysis and range analysis by Spss statistical analysis software. Finally, Obtainingthe optimal combination via integrated weighted analysis. When box chamber positive pressure reached2kp、suction hole diameter is1.2mm、roller speed is14r/min, we can get the best effect. This studyprovides a theoretical and practical basis for the further design of Cylinder precision tomato seeder basedon the pneumatic suspension seed supply.