关键词: 小型穴施肥机, 振动, 排肥性能, 离散元仿真, 外槽轮排肥器

Abstract: As an important part of the fertilizer applicator, the drainage performance of the fertilizer drainage device will directly affect the growth and yield of crops. When the small hole fertilizer applicator works in the field, due to the different driving speed, uneven surface and other factors, it will cause greater vibration to the fertilizer discharging device of the fertilizer spreader and reduce the accuracy of fertilizer discharge. In this paper, the discharge performance of the fertilizer discharging device of the fertilizer spreader under different vibration conditions is analyzed by discrete element simulation. The results show that the drainage axle has the best fertilization performance when the vibration acceleration is 34.67m/s2, the effective working length of the displacement axle is 50mm, and the speed is 10r/min. In the case of vibration settings, the amount of fertilizer discharge increases with the increase of vibration acceleration, and the coefficient of variation of fertilizer displacement increases first and then decreases with the increase of vibration acceleration. Without vibration conditions, there is little difference in the amount of fertilizer discharged from a single hole. Field experiments were carried out to analyze the drainage performance of the drainage apparatus under different excitation conditions, and when the excitation was 0cm, 3cm and 6cm, the relative errors of the fertilization amount of the field experiment and the simulation test were 4.53%, 3.84% and 2.85%, respectively.

Key words: small hole fertilizer, vibration, drainage performance, discrete element simulation, outer groove wheel drain