农业机械学报2017，Vol.48Issue(11)：165-171,7.DOI:10.6041/j.issn.1000-1298.2017.11.020
锤片式粉碎机粉碎玉米秸秆机理分析与参数优化
Mechanism Analysis and Parameter Optimization of Hammer Mill for Corn Stalk
摘要
Abstract
As the important resource of biomas energy convension and feed utilization,corn stalk needs to be smashed to improve the effective utilization rate.In order to study the performance of hammer mill for corn stalk,the process and performance of smashing corn stalk was studied by hammer mill.Based on the analysis of smashing process by high-speed photography,main smashing types of corn stalk were decided as following:impact smashing,hit smashing and rub smashing,and the impact smashing and rub smashing had greater influences,it could be obtained that the linear velocity of the hammer (the rotation speed) and moisture content of corn stalk had greater influences on the smashing performance of the hammer mill.Then,the main factors that affected the smashing performance of hammer mill (the rotation speed,moisture content of corn stalk and screen size) were chosen as the experimental factors,the output per kW·h was decided as the evaluation index,and experiments were conducted.The experimental results showed that the sequence of various factors' influence on the output per kW·h was screen size,moisture content of corn stalk and the rotation speed.Parameters were optimized based on regression models.With the maximum output per kW· h as the optimization object,the ranges of the factors were chosen as follows:the moisture content of 10％ ～ 50％,the rotation speed of 2 000 ～ 3 500 r/min and the screen size was 6mm.Parameter optimization results showed that when the moisture content of corn stalk was 10％ ～ 32％,the rotation speed was 2 000 r/min,when the moisture content of corn stalk was 33％ ～ 50％,the rotation speed was 2 020 ～ 2 452 r/min,and the rotation speed was increased with the increase of moisture content of corn stalk.The research can provide theoretical and technical basis for design of hammer mill for corn stalk.关键词
玉米秸秆/锤片式粉碎机/机理分析/参数优化Key words
corn stalk/hammer mill/mechanism analysis/parameter optimization分类
农业科技引用本文复制引用
王德福,王沫,李利桥..锤片式粉碎机粉碎玉米秸秆机理分析与参数优化[J].农业机械学报,2017,48(11):165-171,7.基金项目
国家重点研发计划项目(2016YFD0701300)和国家自然科学基金项目(51405076) （2016YFD0701300）
