摘要
以刮板式花生脱壳机转轴部件为研究对象,为了分析转轴部件中零部件对转子系统临界转速的影响,通过对转轴系统的简化,采用一维有限元的方法,考虑了陀螺效应对转子系统的影响,分别建立了转轴转子系统有限元模型,皮带轮—转轴转子系统有限元模型,刮板—转轴转子系统有限元模型和转轴部件转子系统有限元模型,研究了皮带轮和刮板部件对转轴系统临界转速的影响。结果表明,皮带轮和刮板部件对单转轴转子系统的临界转速影响都较大,刮板部件对一阶正进动的临界转速影响大于皮带轮对转轴的影响,而对一阶反进动的临界转速影响小于皮带轮的影响,刮板部件对二阶临界转速的影响大于皮带轮的影响;在综合考虑了皮带轮和刮板部件对转轴转子系统的影响后,计算了能够反映实际情况的转轴部件的临界转速,其一阶反进动临界转速较低,一阶和二阶正进动临界转速较为接近;为了保证该刮板式花生脱壳机的安全运行和正常工作,转轴部件的工作转速应低于904r/min。
With the scraper peanut sheller shaft parts as the research object, in order to analyze the part of shaft parts to the critical speed influence, and through the simplify of the shaft system, using one-dimensional finite element method, considered the influence of gyro effect to the rotor system, the shaft rotor system finite element model, the pulley-shaft rotor system finite element model, the scraper-shaft rotor system finite element model, and the shaft parts rotor system fi- nite element model are established, researched the pulley and scraper to the influence of the critical speed shaft system, the results show that pulley and scraper to the rotor system critical speed influence is great, for the first forward preces- sion critical speed, the influence of scraper is greater than the pulley, but for the first backward precession critical speed, the influence of scraper is less than the pulley, considered the pulley and scraper influence to the rotor system, calculated the critical speed of the shaft parts rotor system, the first backward precession critical speed is low, the value of the first and second forward precession critical speed is closer, in order to guarantee the scraper peanut sheller safe op- eration and regular work, the speed of the shaft parts should be lower than 904r/min.
出处
《农机化研究》
北大核心
2012年第11期29-32,共4页
Journal of Agricultural Mechanization Research
基金
江西理工大学科研计划项目(jxxj11147)
关键词
花生
脱壳机
临界转速
一维有限元
peanut
scraper sheller
critical speed
one-dimensional FEM
