关键词: 方捆机, 喂入机构, 喂入叉, 运动仿真分析, 静力学仿真分析, 模态分析

Abstract: Aiming at the problems of easy blocked feeding and low operating efficiency of the square baler, a dual feeding fork type feeding mechanism was designed by using SolidWorks. By using SolidWorks Motion software, the motion simulation analysis of the feeding mechanism was carried out to obtain and analyze the motion trajectory and speed change trend of the feeding fork endpoint, and to confirm that the structural design of the feeding mechanism met the feeding requirements. The static and modal simulation analysis of the feeding mechanism was performed by using SolidWorks Simulation software. The results show that the maximum stress of the feeding mechanism is 565 MPa, and the maximum stress of the connecting rod is 293 MPa, which is less than the yield strength of the material, and the strength of the feeding mechanism meets the requirements. The lowest natural mode frequency (first‑order mode) of the feeding mechanism is 67.127 Hz, which is different from the working frequency of the feeding mechanism of 1.67 Hz and the engine excitation frequency of 18 Hz. The feeding mechanism will not resonate, and the feeding mechanism mode meets the requirements. Field experiments show that the productivity of the square baler is 8.7 t/h, the baling rate is 99.4%, and the straw bale density is 125.6 kg/m3.

Key words: quare baler, feeding mechanism, feeding fork, motion simulation analysis, static simulation analysis, modal analysis