关键词: 全混合日粮, 制备机, 取料机构, 正交试验, 参数优化

Abstract: In view of the lack of feeding mechanism and parameter optimization of domestic selfpropelled total mixed ration preparation machine, the feeding mechanism of selfpropelled total mixed ration preparation machine was designed and analyzed, the theoretical model of feeding operation was established, and the key parameters such as screw pitch, screw blade diameter, roller speed, forward speed, feed per blade and feed blade length ratio were calculated and selected. EDEM was used to simulate and analyze the factors affecting the forward speed, roller speed, spiral blade pitch and blade length ratio by orthogonal test scheme, and the simulation results were analyzed by variance analysis. The analysis showed that the primary and secondary order of the influence of various factors on the feed efficiency was as follows: forward speed, spiral blade pitch, blade length ratio, and roller speed. The primary and secondary order of the influence of various factors on the return rate was as follows: spiral blade pitch, blade length ratio, roller speed, and forward speed. Considering the feed efficiency and reflux rate, the optimal parameters were as follows: the forward speed was 4 m/min, the screw pitch of the spiral blade was 230 mm, the edge length ratio of the feed cutter was 1.8, and the speed of the feed roller was 230 r/min. At this time, the feed efficiency was 82.6 m3/h and the reflux rate was 38.93%. The experiment was carried out by using the optimal parameter combination. The experimental results showed that the reclaiming efficiency was 77.02 m3/h and the reflux rate was 3976%, which was basically consistent with the simulation analysis.

Key words: total mixed ration, preparation mixer, feed mechanism, orthogonal test, parameter optimization