Authors

Abstract

The performance of a hammer mill is affected by the formation of a circulation layer. In this paper, an airfoil-triangle sieve was designed to destroy the circulation layer and improve the performance of the hammer mill. To determine the optimal design parameters of the airfoil-triangle sieve, three-factor and three-level tests were carried out by using the productivity and output per kW•h as the evaluation indexes and the airfoil camber, angle of attack and isosceles angle as the influencing factors. The order of the influences on the productivity was airfoil camber>angle of attack>isosceles angle. The order of the influences on the output per kW•h was angle of attack>airfoil camber>isosceles angle. The optimum combination after parameter optimization was determined to be as follows: airfoil camber of 0.15, angle of attack of 10° and isosceles angle of 113°. A test was carried out with to the optimum parameter combination. The results showed that the productivity and output per kW•h were 1101.56 kg/h and 188.97 kg/kW•h, respectively, which were consistent with the predicted results. The regression model was reliable.

Abstract in Chinese

针对锤片式粉碎机工作时物料环流层影响机器性能（生产率、功率消耗）的问题，本文以CPS-420型锤片式粉碎机为研究样机，设计了翼型三角形筛片，以破坏物料环流层，提高粉碎机性能。为确定筛片最佳设计参数，以翼型三角形筛片的弯度、冲角、等边角度数为试验因素，以生产率和度电产量为评价指标，利用Box-Benhken试验方法进行了三因素三水平响应面试验分析。结果表明：对生产率影响的主次因素为：弯度>冲角>等边角度数；对度电产量影响的主次因素为：冲角>弯度>等边角度数。基于响应面法进行参数优化，确定筛片设计最佳参数组合为弯度0.15，冲角10°，等腰角度数113°。以优化后的参数组合进行试验验证，试验结果为：生产率和度电产量分别为1101.56kg/h、188.97kg/kW•h，与模型预测结果基本吻合，回归模型可靠。