关键词: 苹果园, 开沟施肥机, 排肥装置, 有机肥, 仿真模拟

Abstract: In response to problems such as the unstable and uniformity of the organic fertilizer application in modern apple orchards, combined with the cultivation mode and agronomic requirements of fertilization in the modern apple garden, a traction fertilizer machine was designed and its fertilizer discharge  device was also studied. With the amount and consistency of fertilizer discharge as the test index, the height of scraper, the speed of scraper chain, the height of baffle and the forward speed of unit as the test factors, the simulation was carried out by using discrete element software EDEM. The simulation results showed that the speed of the blade chain was 0.2 m/s, the exhaustible consistency effect of the exhaust unit was better, the height of the fertilizer plate, the speed of the unit advancement and the height of the shell featuring plate have no significant effect on the consistency of the fertilizer discharge, and all of the test factors have a significant impact on the fertilizer discharge amount. The trial system was tried, and the results showed that when the sprocket speed was 0.2 m/s, the height of the fertilizer plate was 0 mm, the fertilizer was 2.02 kg/s, and the theoretical value of the exhaust gas was 1.91 kg/s, the simulation calculated value was 1.96 kg/s, the error value was 5.44% and 2.97%; the simulation test and the consistency trend of the meter test were the same, when the organic fertilizer in the fertilizer was reduced, the consistency was consistent, the maximum error was 12.02%, which met the requirements of orchard operation.

Key words: apple orchard, trench fertilizer applicator, fertilizer discharge device, organic fertilizer, simulation calculation