关键词: 农业类颗粒体, 蓬松, 螺旋叶片, SolidWorks

Abstract: Aiming at the practical problems of agricultural granular materials such as longterm storage and easy bonding after deliquescence, a kind of mechanism was designed to make the agricultural granular materials become fluffy when they became clumps or lumps under specific working conditions. Firstly, the shaft type spiral shaft was selected as the main shaft of the spiral blade, and the maximum workload of the mechanism was 60 kg at a time, the designed spiral blade width was 127.5 mm, the thickness of the inner edge blade was 20 mm, and the thickness of the outer edge blade was 10 mm. This paper uses SolidWorks software and simulation tool to check the stiffness and strength of the blade. Then, single factor variable experimental analysis method was used to investigate the characteristics of particles and the movement law of particles when entering the mechanism, and the influence of the volume of particles and the rotational speed of spiral blades on the volume of particles. Finally, two parameters of motor speed and single workload were set, and the working efficiency and fluffiness of the mechanism were studied by means of particle material test to verify the practicability of the mechanism. The results showed that the designed mechanism had good reliability and stability. The rotation speed of the fluffiness mechanism was positively correlated with the fluffiness ratio, while the particle volume was negatively correlated with the fluffiness ratio. Taking the agglomerated ammonium sulfate feed particles as the test object, the fluffiness ratio of the lump particles can reach more than 98.23% at the motor speed of 1 000-1 200 r/min.

Key words: agricultural granular materials, fluffy, spiral blade, SolidWorks