关键词：
红枣去核机;主轴;ANSYS;静态分析;模态分析
摘 要：
针对自行设计的红枣去核机传动系统中的主轴进行有限元静态分析和模态分析;利用UG软件完成红枣去核机传动系统中主轴三维模型设计和有限元模型建立。对主轴进行满载工况下的静力学分析表明:主轴所受的力矩从大到小依次为驱动力矩、去核系统阻力矩、拨盘阻力矩、螺旋输送器阻力矩,最大等效应力、应变均发生在安装驱动链轮的键槽处,主轴所受到的最大等效应力为110.53MPa<[τ]=293.3MPa,最大等效应变为0.0 0 0 5 4 9 8 8,可知主轴材料与结构设计均能满足去核机工作要求;对主轴进行模态分析可知,传动主轴前6阶模态固有频率为1 939.9~5 131.1Hz。振型图表明:随着固有频率的增加,主轴的振动破坏区域逐渐由拨盘键槽所在轴阶向两端移动,当固有频率为4 189.4Hz时,破坏最严重,总变形量达到957.82mm;主轴发生共振的最低临界转速为116 394r/min,而去核机传动主轴的转速范围为15~60r/min,可知主轴在工作过程中是安全的。该研究为红枣去核机传动系统及整机结构、性能改进及优化提供了理论依据。
译 名：
The Finite Element Analysis of the Spindle of Transmission System of the Jujube Pit Removing Machine
作 者：
Yang Yi;Zhou Jingbo;Zhang Shujuan;College of Engineering,Shanxi Agriculture University;
关键词：
jujube pit removing machine;;spindle;;ANSYS;;static analysis;;modal analysis
摘 要：
In this paper,the spindle of transmission system of the self-designed jujube pit removing machine was analyzed by finite element static analysis and modal analysis. The three-dimensional model and the finite element model of the spindle of jujube pit removing machine were established by using UG software and ANSYS software. The statics analysis of the spindle in full working condition showed that: the moment of spindle from large to small were driving moment,resistance moment of pit removing system,resistance moment of driver plate and resistance moment of spiral conveyor. The maximum equivalent stress and strain of spindle were 110. 53 MPa <[τ]= 293. 3MPa and 0. 000 549 88 respectively,both mainly concentrated in the keyway which installed the drive sprocket. The materials and structure design of spindle could meet the machine working requirements. Modal analysis of spindle showed that the first six modal natural frequency were 1 939. 9 ~ 5 131. 1Hz. Vibration shape diagram showed: the vibration damage area of spindle moved from keyway to the both ends gradually with the increase of natural frequency. When the natural frequency was 4 189. 4HZ,the damage was worst and the total deformation was957. 82 mm. The minimum critical speed of spindle resonance was 116 394 r / min and the speed range of spindle were 15~ 60 r / min,so the spindle was safe in the working process. In conclusion,this study provided theoretical basis for the design and optimize of transmission system of jujube pit removing machine.
