Design and experiment of impeller seed guide device for rice internal suction hole direct seeding device

Abstract

Hole seeding and uniform hole spacing are important agronomic evaluation indexes of rice precision hill-direct-seeding metering device. Based on the principle of internal suction seeding, this paper innovatively designs an impeller seeding device. The main structural parameters of the impeller seed guide device were analyzed by constructing the kinematics model of the rice seed in the impeller seed guide process. The effects of impeller radius, blade offset angle and seeding angle on the performance of the seed guide device were studied by bench seeding test. The seed-guiding experiments of different sizes of seeds show that the impeller has better hole-forming and seed-guiding performance than the traditional seed-guiding tube. The impeller seed guiding device proposed in this paper can improve the performance of fixed-distance multi-grain hill-seeding in the tubular seed guiding device, it provides a reference for the design of seed guide device for multi-grain bunching crop seed metering device.