摘要
为了预测往复直线振动筛在合成激振力作用线偏移筛体质心情况下的运动特性,建立了振动筛的动力学模型,以筛体质心的运动方程为基础,推导出筛体上任意点的运动位移方程,分析筛体上任意点的运动轨迹,研究合成激振力作用线偏移筛体质心距离和位置对筛体上任意点运动特性的影响规律。结果显示:筛体上任意点的运动轨迹仍然为一条直线,不同点的振幅和振动方向角不相同;当合成激振力作用线从筛体质心上方经过时,筛体上端点的振幅和振动方向角增加,而下端点则减小,筛体上端点距离质心越远其对应的振幅和振动方向角越大,而下端点则越小;当合成激振力作用线从筛体质心下方经过时,筛体上端点与下端点的振幅和振动方向角的变化规律与前者相反。该结论为设计出性能更加优良的振动筛提供理论依据。
In order to predict the motion characteristics of reciprocating＇ linear vibrating screen in the case of the synthetic exciting force action line offset screen centroid, a dynamic model of the screen was established. The motion displacement equation of arbitrary point on the screen body was derived based on the motion equation of the screen centroid. The trajectories of arbitrary point on the screen body were studied. The influence of distance and location of the synthetic exciting force action line offset screen centroid to the motion characteristics of an arbitrary point on the screen body were studied. The results showed that the trajectory of an arbitrary point on the screen body was still a straight line, vibration amplitudes and direction angles at different points were different. When the synthetic exciting force action line passed through above the screen centroid, vibration amplitude and direction angle of upper point on the screen increased, while the lower point was reduced. The more distance from the upper point on the screen to the centroid, the greater the corresponding amplitude and vibrating direction angle,while the lower point was smaller. When the synthetic exciting force action line passed through below the screen centroid, the change law of amplitude and vibrating direction angle of upper point and lower point on the screen body was contrary to the former. The conclusion provided a basis for a more excellent performance design of vibrating screen.
出处
《粮食与饲料工业》
CAS
2016年第1期8-12,共5页
Cereal & Feed Industry
基金
国家"十二五"科技支撑计划项目(编号:2011BAD03B01-03)
河南省重大科技专项(编号:121199110120)
河南省高等学校重点科研项目(编号:16A460004)
关键词
粮食清理
往复直线振动筛
动力学模型
偏移质心
振幅
振动方向角
grain clearing
reciprocating linear vibrating screen
dynamic model
offset centroid
amplitude
vibration direction angle
