Authors

Abstract

In order to clarify the working mechanism of forage crusher, the combined cutting and crushing forage crusher was taken as the research object, the mechanical analysis was carried out on the cutting and crushing process of alfalfa stalk, the dynamic model was established, and the relationship between the shear force and the relevant parameters of the cutting mechanism was defined. It was found that the cutting Angle, the installation Angle and the wedge Angle had important effects on the cutting effect and power consumption. The force of alfalfa stem in the grinding chamber is mainly related to the speed of the grinding shaft, the gap between the hammer and the rolling plate. With the output speed of motor, feeding amount, screen diameter and water content as test factors, productivity, silking rate, power consumption and average crushing length as evaluation indicators, the single factor test was carried out to determine the influence of each test factor on the evaluation indicators. The research results can provide reference for the optimization design of grass crusher.

Abstract in Chinese

为明确牧草粉碎机工作机理，以切割粉碎组合式牧草粉碎机为研究对象，对苜蓿茎秆切割和粉碎过程进行了力学分析，建立了动力学模型，明确了剪切力与切割机构相关参数的关系，得到动刀遇角、安装后角和楔角对切割效果和功耗具有重要影响；苜蓿茎秆在粉碎室内受力主要与粉碎轴转速、锤片和揉搓板间隙有关。以电机输出转速、喂入量、筛孔直径、含水率为试验因素，生产率、丝化率、功耗、平均粉碎长度为评价指标，进行了单因素试验，确定了各试验因素对评价指标的影响规律，研究结果可为牧草粉碎机的优化设计提供参考。