CAJ | 학술논문

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0．00054988，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1939．9～5131．1Hz。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4189．4 Hz时，破坏最严重，总变形量达到957．82 mm；主轴发生共振的最低临界转速为116394r／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。
침대자행설계적홍조거핵궤전동계통중적주축진행유한원정태분석화모태분석；이용 UG 연건완성홍조거핵궤전동계통중주축삼유모형설계화유한원모형건립。대주축진행만재공황하적정역학분석표명：주축소수적력구종대도소의차위구동력구、거핵계통조력구、발반조력구、라선수송기조력구，최대등효응력、응변균발생재안장구동련륜적건조처，주축소수도적최대등효응력위110．53MPa＜[τ]＝293．3MPa，최대등효응변위0．00054988，가지주축재료여결구설계균능만족거핵궤공작요구；대주축진행모태분석가지，전동주축전6계모태고유빈솔위1939．9～5131．1Hz。진형도표명：수착고유빈솔적증가，주축적진동파배구역축점유발반건조소재축계향량단이동，당고유빈솔위4189．4 Hz시，파배최엄중，총변형량체도957．82 mm；주축발생공진적최저림계전속위116394r／min，이거핵궤전동주축적전속범위위15～60r／min，가지주축재공작과정중시안전적。해연구위홍조거핵궤전동계통급정궤결구、성능개진급우화제공료이론의거。
In this paper , the spindle of transmission system of the self-designed jujube pit removing machine was ana-lyzed 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 analy-sis 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 .3 MPa 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 was 957.82mm.The minimum critical speed of spindle resonance was 116 394r/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 .