摘要
针对二层及三层筛式花椒筛选机筛选摆动频率、筛净率及筛选效率低等问题,设计了四层筛式花椒筛选机,利用顶层筛与第2层筛连接、第3层筛与底层筛连接,两套连接装置由偏心轮驱动和连杆牵引摆动时互为反向运动,从而减小摆动不平衡力矩,提升筛选最高摆动频率。开展了整机结构与关键部件设计,机架及四层筛的振动模态仿真,分析了机架与筛面稳定性、摆动机构参数、筛面倾角与摆角,进行了筛选稳定性和筛选性能试验。结果表明:筛选机机架、顶层筛、第2层筛、第3层筛和底层筛的1阶振动频率分别为9.7、9.9、11.7、9.3、9.4 Hz,整机固有振动频率约为11.8 Hz;筛选频率越高则最大喂入量和筛选效率越大;筛选机摆角为2.77°、顶层及底层筛倾角分别为6.95°和8.12°时,最优筛选频率为9.0 Hz,最大喂入量达792 kg/h,筛选效率为559 kg/h,花椒壳筛净率和损失率分别为98.1%和3.1%,花椒籽筛净率和损失率分别为94.1%和4.2%。
In view of the problems of low screening swing frequency,low screening rate and low screening efficiency of the two-layer and three-layer screen-type zanthoxylum screening machines,a four-layer sieve type zanthoxylum screening machine was designed.The top sieve was connected with the second sieve,the third sieve was connected with the bottom sieve.The two sets of connecting devices driven by the eccentric wheel and pulled by the connecting rod moved in opposite directions when swinging,thereby reducing the swing unbalanced moment and improving the screening of the highest swing frequency.And the design of the whole machine structure and key components was carried out.The vibration modal simulation of the frame and the four-layer screen was carried out.The stability of the frame and the screen surface,the parameters of the swing mechanism,the inclination angle and the swing angle of the screen surface were analyzed.The screening stability and screening performance were tested.The results showed that the first-order vibration frequencies of the frame,top screen,second screen,third layer and bottom screen of the screening machine were 9.7 Hz,9.9 Hz,11.7 Hz,9.3 Hz and 9.4 Hz,respectively.The natural vibration frequency of the whole machine was about 11.8 Hz.The higher the screening frequency was,the greater the maximum feeding amount and screening efficiency were.When the swing angle of the screening machine was 2.77°,the inclination angles of the top and bottom screens were 6.95°and 8.12°,respectively.The optimal screening frequency was 9.0 Hz.The maximum feeding amount of screening was 792 kg/h,and the screening efficiency was 559 kg/h,and the net rate and loss rate of zanthoxylum shells were 98.1%and 3.1%,respectively.The net rate and loss rate of zanthoxylum seeds were 94.1%and 4.2%,respectively.
作者
郭关柱
张易楷
罗亚南
毛韦迪
GUO Guanzhu;ZHANG Yikai;LUO Ya'nan;MAO Weidi(College of Mechanical and Electrical Engineering,Yunnan Agricultural University,Kunming 650201,China;Yunnan Zhaozhan Agricultural Science and Technology Development Co.,Ltd.,Kunming 650504,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2022年第12期203-211,230,共10页
Transactions of the Chinese Society for Agricultural Machinery
基金
云南省兴滇英才支持计划产业创新人才专项(YNWR-CYJS-2018-050)
云南省教育厅科研基金项目(2023Y0835)
关键词
花椒筛选机
四层筛
振动频率
筛净率
筛选效率
zanthoxylum screening machine
four-layer screen
vibration frequency
screen cleanliness
screening efficiency
作者简介
郭关柱(1973—),男,教授,博士,主要从事专用机械传动与控制和系统集成研究,E-mail:guoguanzhu_616@126.com;通信作者:罗亚南(1972—),女,高级工程师,主要从事专用机械传动与控制研究,E-mail:1339706332@-qq.com
