Authors

Abstract

Low productivity and high electricity consumption are considered problems of the hammer mill, which is widely used in current feed production. In this paper, the mechanical properties of corn grain ground by a hammer mill were analysed, and the key factors affecting the performance of the hammer mill were determined. The single-factor experiment and three-factor, three-level quadratic regression orthogonal experiment were carried out with the spindle speed, corn grain moisture content and number of hammers as experimental factors and the productivity and electricity consumption per ton as evaluation indexes. The results showed that the order of influence on the productivity was spindle speed > corn grain moisture content > number of hammers and that the order of influence on the electricity consumption per ton was corn grain moisture content > spindle speed > number of hammers. The parameters were optimized based on the response surface method with the following results: the spindle speed was 4306 r/min, the corn grain moisture content was 10%, and the number of hammers was 24. The validation experiment was carried out with the optimal parameters’ combination. The productivity and electricity consumption per ton were 988.12 kg/h and 5.37 kW·h/t, respectively, which were consistent with the predicted results of the model.

Abstract in Chinese

针对目前生产中普遍使用的锤片式粉碎机存在生产率低、能耗高的问题。对锤片式粉碎机粉碎玉米颗粒力学特性进行分析，确定了影响锤片式粉碎机性能的关键因素。为确定锤片式粉碎机最佳工作参数组合，以主轴转速、玉米颗粒含水率、锤片数量为试验因素，以生产率和吨料电耗为评价指标，开展了单因素试验和三因素三水平二次回归正交试验。结果表明，影响生产率的主次因素为：主轴转速>玉米颗粒含水率>锤片数量；影响吨料电耗的主次因素为：玉米颗粒含水率>主轴转速>锤片数量。基于响应面法进行参数优化，优化结果为：主轴转速为4306 r/min, 玉米颗粒含水率为10 %，锤片数量为24。以优化后参数组合进行试验验证，结果为：生产率和吨料电耗分别为988.12 kg/h，5.37 kW•h/t，与模型预测结果一致。