纵轴式掘进机多工况下振动特性试验研究
Experiment study of vibration characteristics for the longitudinal axial roadheader under multi-working conditions
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摘要: 为掌握纵轴式掘进机关键部件的振动特性，对EBJ-120TP型掘进机进行了空载、钻进、向右横扫、向下竖扫、向左横扫多工况下振动特性试验.结果表明，截割工况与空载工况相比，呈现出随机振动特征并伴随有瞬间冲击；掘进机在截割工况下的振动表现出非稳态、非线性的特性，且主振频在10~1000 Hz范围，主频带分布较宽；钻进工况下振动最激烈，该工况下截割减速器的振动烈度最大，等级为D，电控箱振动烈度等级达到C；向下竖扫和钻进工况下舒适性最差，严重影响操作人员身体状况.通过采用黏弹性阻尼材料减振措施，振动值较原型机下降了30%.Abstract: To master the vibration characteristics of the longitudinal-type roadheader,the in-situ vibration test over the EBJ-120TP under classic working conditions,i.e.,free loading,drilling,right-and-left cutting and downward cutting was carried out.The results were as follows:the cutting condition exhibited a random vibration characteristic compared with free loading, and was accompanied by an instantaneous impact;the roadheader vibration displayed non-stable and nonlinear feature,and had an extensive frequency scale ranging from 10 Hz to 1000 Hz; drilling was the most serious working condition,in which the cutting gear box had greatest vibration with level D(not permissible),while electronic control with level C(just tolerable); the operator would feel worst in downward cutting and drilling.Through the using of viscoelastic damping material vibration reduction measures, the vibration value of the prototype machine decreased by 30%.
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