双层型孔浮动组合腰带式棉花精量穴播器设计与试验OA

Aiming at the problems of the mechanical cotton dibbler in high-speed operation,such as the reduction of seeding accuracy and the increase of hole rate,a double-layer hole floating combined belt dibbler was designed from the perspective of cotton seed-adaptive filling and high-efficiency seed cleaning.The structure and size of the key parts of the dibbler were designed,and the orderly filling and high-efficiency seed cleaning of the seeds were achieved by using adaptive vibration based on the key parts of the dibbler,such as the seed taking plate and floating combined belt,so as to meet the requirements of precision seeding of the dibbler in the process of high-speed operation.Combined with the force of cotton seed in the process of operation,the force model of cotton seed in the process of seed taking was estab-lished.At the same time,according to the vibration principle equation,the forced vibration equation of floating combina-tion belt under harmonic excitation vibration in the process of seed cleaning was established.The response surface optimi-zation test was used,the effects of three main factors,including the rotation speed of the dibbler,the height of the seed layer,and the arc length of the gravity block,on the single seed rate of the dibbler were analyzed.The results showed that when the dibbler speed was 24.60 r/min,the seed layer height was 116.41 mm,and the gravity block arc length was 47.48 mm,the qualified rate of the number of seeds in the hole was 92.21%,and the seed metering performance was better,which can meet the requirements of cotton seeding operation.The research results can provide a reference for the research on the seeding performance of mechanical cotton high-speed precision dibbler and improving the operation quality of cotton seeder.