螺旋钻采煤机输送机构振动频率的计算与分析  

Calculation and analysis of vibration frequency of spiral conveyor for coal auger

作　　者：李晓豁[1] 郭继文[1,2] 王丽[1,2] 战林[1,2] 

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123000 [2]郑州四维机电设备制造有限公司,河南郑州450001

出　　处：《广西大学学报（自然科学版）》2011年第6期897-902,909,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(59774033);国家煤矿安全监察局安全生产科技发展指导性计划项目(06-292);辽宁省第二批科学技术计划项目(2008403010);辽宁省安全生产监督管理局安全生产科技发展(辽安监规划[2009]88号文)

摘　　要：为了研究螺旋钻采煤机输送机构工作过程的振动,根据Lyapunov理论建立了用欧拉角描述的振动动力学方程,应用ANSYS软件建立了基于APDL语言的参数化有限元仿真模型,利用两种方法对某型螺旋钻采煤机输送机构的振动频率进行了计算和仿真,得到了输送机构前五阶的振动频率和最大振幅等效云图。其中通过ANSYS振动分析显示:横向共振发生在X和Z方向,最大共振振幅分别发生在500、100 Hz处,纵向共振发生在Y向,最大共振振幅发生在500 Hz处,其中X方向振幅最大,Z向振幅最小;应力云图显示,输送机构的底部应力较小,顶部应力较大,主轴与螺旋叶片交接处的应力最大,磨损及变形严重。研究表明:Lyapunov理论模型思路清晰,计算简便,而ANSYS模型使用灵活方便、求得结果直观明显,但计算精度与单元类型的选取、网格划分精度和振动提取方法有关。两种方法求得结果的最大误差为9.9%,能够反映其振动情况。In order to study the vibration behavior of spiral conveyor of a coal auger during the work process,a dynamic model using Euler angles to describe the vibration according to Lyapunov theory was established,and ANSYS software was used to establish parameterization finite element simulation model based on APDL language.The vibration of a certain type of spiral conveyor for coal auger were calculated and simulated using the two methods,and the first fifth-order vibration frequency and maximum amplitude equivalent contour of spiral conveyor were obtained.The results of vibration analysis by ANSYS show that transverse resonance occurred in the X and Z directions,the maximum resonance amplitude occurred in the 500 Hz and 100 Hz,longitudinal resonance occurred in the Y direction,the maximum resonance amplitude occurred in the 500 Hz,and the amplitude of X direction is the largest and amplitude of Z direction is the minimum.The stress contour shows that the stress of spiral conveyor is minimum at the bottom,and the stress at the junction of spindle and helical vane is maximum.Because of the large stress at the top of spiral conveyor,the wear and deformation is serious.The results indicate that the Lyapunov theory model is straight forward and the calculation is simple;the ANSYS model is flexibility and the results are intuitively obvious although the accuracy is dependent on the selection of element type,meshing accuracy and the methods of vibration extraction.The maximum error obtained from both methods is 9.9%,capable of reflecting the true vibration.

关 键 词：螺旋钻采煤机 输送机构 振动频率 动力学模型 有限元模型 

分 类 号：TP028.8[自动化与计算机技术]