Structural Design and Analysis of Air Suction Precision Metering Device for White Radish
In order to meet the requirements of mechanical planting of white radish and solve the problem of lack of related planting machinery in southwest China,an air-suction precision seeder was designed.Through calculation and theoretical analysis,the key structural parameters of the seeder were designed.The force of seeds in the filling,carrying and seeding stages were analyzed,and the main factors affecting the sowing performance were determined.By using Fluent software,the influence of different hole size parameters on the air flow of the negative air pressure chamber was simulated,and the optimal hole diameter parameters were determined,the diameter of the hole was 2.079～2.178 mm.Through parameter optimization,the best parameter combination was obtained:the diameter of the seed plate was 200 mm,the distribution of the hole diameter was 160 mm,the number of holes was 16,and the hole diameter was 2.2 mm.The results of the bench test of seeding performance showed that the working speed was 30.54 r·min-1,the air pressure in the negative air pressure chamber was 6.58 kPa,the single grain qualification index of the seeder was 95.61%,the missed seeding index was 0.64%,and the reseeding index was 2.04%.The results improved the performance of the seeder and provided reference the design and manufacture of white radish precision seeding machine.
white radishair suction seed metering deviceprecision sowingsimulation
国家科技期刊平台
NSTL
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