【摘要】 为解决青贮玉米在打捆过程中出现的草捆表面层损伤、物料散落和打捆包密度低等问题，获得青贮草捆最佳压缩密度—时间组合，设计出青贮玉米打捆包膜一体机。分析青贮草捆初始密度对其粘连性系数的影响，青贮玉米压缩密度为960 kg/m~3时，粘连性系数达到最大值144 kg/（m·s），青贮物料营养损失最小。对打捆钢辊进行优化设计和类比仿真分析，光辊、筋条钢辊和人字钢辊对草片的卷积压力分别为403.5 kPa、410.4 kPa和432.5 kPa。光辊、筋条钢辊和人字钢辊卷积草片时翘曲幅度分别为130.7 mm、89.81 mm和84.42 mm。通过人字钢辊可靠性分析，验证人字钢辊结构强度可靠。根据青贮捆包尺寸、钢辊直径和附加机构尺寸，设计出打捆仓、捆绳打结器、捆包暂存站和操作站Simulink控制系统。通过整机试验，得出作业时间和打捆密度分别为122 s和960.3 kg/m~3时，最接近粘连性系数分析的理想压缩密度，获得最小青贮玉米营养损失，并计算出Amesim液压控制系统传感器的设定值为101.7 MPa。更多还原

【Abstract】 In order to solve the problems of bale surface layer damage, material scattering, and low bale density during the baling process of silage corn, and to obtain the optimal compression density-time combination of silage bales, a baling and wrapping machine of silage corn was designed. By analyzing the impact of the initial density of the silage bale on its adhesion coefficient, it was found that when the compressed density of silage corn was 960 kg/m~3, the adhesion coefficient reached the maximum value of 144 kg/（m·s） and the nutrient loss of the silage material was minimal. Through optimized design and analog simulation analysis of the baling steel roller, it was concluded that the convolution pressure of the smooth roller, rib steel roller, and herringbone steel roller on the grass blades were 403. 5 kPa, 410. 4 kPa and 432. 5 kPa respectively. In addition, according to the displacement and deformation of the grass blades, the warpage amplitudes of the smooth roller, rib steel roller and herringbone steel roller when convolving the grass pieces were 130. 7 mm, 89. 81 mm and 84. 42 mm respectively. Finally, through the reliability analysis of the herringbone steel roller, it was verified that the structural strength of the herringbone steel roller was reliable. Based on the size of the silage bale, the diameter of the steel roller and the size of the additional mechanism, the simulink control system for the baling bin, rope knotter, bale temporary storage station and operation station was designed. In the end, through the whole machine test, it was concluded that when the operating time and baling density were 122 s and 960. 3 kg/m~3 respectively, the ideal compression density was closest to the adhesion coefficient analysis, and the minimum nutrient loss of silage corn was obtained, and the setting value of the Amesim hydraulic control system sensor was calculated as 101. 7 MPa.更多还原