变轨迹等厚筛振动方向角的计算及实验验证  

Calculation and experimental verification of vibrating direction angle of varying trajectory banana screen

作　　者：刘初升[1] 蒋小伟[2] 张士民[1] 赵啦啦[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]中国船舶重工集团公司第七一六研究所,江苏连云港222006

出　　处：《中国矿业大学学报》2011年第5期737-742,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金委员会创新研究群体科学基金项目(50921002);国家自然科学基金项目(50774084);江苏省"333工程"科研基金项目;煤炭加工与高效洁净利用教育部重点实验室开放基金项目(CPEUKF08-02)

摘　　要：提出了一种单轴变轨迹等厚筛分方法,建立了单轴变轨迹等厚筛的动力学模型.基于单轴变轨迹等厚筛的运动特性,提出了振动方向角的几何定义方法,得到了该振动筛振动方向角的计算模型.通过振动信号分析系统获取了振动筛筛箱各点的水平和垂直两个方向上的振动强度以及互功率谱相位,得到了振动方向角的理论值.结果表明,利用该方法得到的计算结果与利用传统的丽萨如(Lissajous)图法求得的结果最大相对误差仅为8.50%,从而验证了振动方向角计算模型的正确性.A kind of varying trajectory banana screening method was proposed and its dynamic model was established.The geometric definition method of the vibrating direction angle was proposed based on motion characteristic of the varying trajectory banana screen and the calculation model of vibration direction angle was obtained ultimately.In addition,the vertical and horizontal vibrating intensities of each point on screen box and cross-power spectrum phases were obtained using the vibration signal analysis system.The theoretical value of the vibrating direction angle was obtained.The results show that the maximum relative error of the calculated results by this method is only 8.50% compared with the results by the Lissajous graph method,that demonstrate a higher accuracy of the calculating model of the vibrating direction angle.

关 键 词：变轨迹等厚筛 振动方向角 互功率谱相位 Lissajous图法 

分 类 号：TD94[矿业工程—选矿]