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, a folded V-shaped hammer was designed to improve the performance of the hammer mill. To determine the optimal design parameters of the new hammer, the single-factor test and orthogonal tests were carried out with the inclination angle of hammer, the angle of hammer head, and the distance of hammer head as the influencing factors, and the productivity and output per kWh as evaluation indexes. The order of the influence on the productivity and output per kWh were the inclination angle of hammer>the angle of hammer head> the distance of hammer head. The parameters were optimized based on the orthogonal tests with the following results: the angle of hammer head was 160°, inclination angle of hammer was 110°, and the inclination distance of hammer head was 24 mm. The static analysis and modal analysis were carried out on the optimized hammer by using ANSYS software. The results showed that the new hammer satisfies the strength and stiffness requirements during working, does not resonate, and has good dynamic characteristics. The new hammer can effectively improve the performance of the hammer mill, and the research results can provide theoretical basis for the optimization design of the hammer mill.

Abstract in English

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。本文以CPS-420型锤片式粉碎机为研究样机，对锤片式粉碎机物料粉碎过程和物料力学特性进行分析，设计了折线式V型锤片，提高粉碎机性能。为确定锤片最佳设计参数，以锤片倾角、锤头角度和倾角距离为因素，以生产率和度电产量为评价指标，开展了单因素试验和正交试验，结果表明：影响生产率和度电产量的因素主次顺序均为锤头角度>锤片倾角>倾角距离。基于正交试验进行参数优化，优化结果为：锤头角度为160°、锤片倾角为110°和倾角距离为24 mm。对优化后的锤片进行静力学分析和模态分析，结果表明：锤片满足工作时的强度和刚度要求，不会发生共振，有较好的动态特性。新型锤片能有效提高锤片式粉碎机的性能，研究结果可为锤片式饲料粉碎机的优化设计提供理论依据。