关键词: 农业机械, 水稻, 气吹集排式, 分种器, 均匀性, 正交试验

Abstract: In order to clarify the uniformity factors and degrees of seeds distributor, an equal density flow field seeds distributor was designed based on the airblowing centralized direct seeding production technology, and a QLBZ-1 electronically controlled seeds uniformity distributing test bench was self-made. Based on the uniformity function test of the seeds distributor, the uniformity influencing factors were analyzed by four-element quadratic orthogonal test, and the single factor comparison test was carried out on the basis of the orthogonal test results. The results of the bench test showed that the factors affecting the uniformity of the seeds distributor were the input pressure and the conveying pipe corrugation thickness, unrelated to the seeding shaft rotation speed and seeding rate. In addition, the interaction between the input air pressure and the corrugation thickness played a role in the uniformity. The air pressure had a quadratic relationship with the coefficient of variation. The air pressure should be kept higher than the critical air pressure when the seeds distributor was working, and the appropriate increase of the corrugation thickness was beneficial to improve the seeds distributing uniformity. The coefficient of variation of the intra-row and inter-row were less than 5%, a data reference for the later comparative test of related parts structure would be provided by the research conclusion.

Key words: agricultural machinery, rice, air-blowing centralized, seeds distributor, uniformity, orthogonal test