一种永磁磁垫式带式输送机的气隙特性研究  

Research on air gap characteristics of permanent magnetic cushion belt conveyor

作　　者：胡坤[1,2] 王爽[2] 李德永[2] 程刚[2] 

机构地区：[1]安徽理工大学煤矿安全高效开采教育部重点实验室,安徽淮南232001 [2]安徽理工大学机械工程学院,安徽淮南232001

出　　处：《煤炭学报》2015年第3期701-706,共6页Journal of China Coal Society

基　　金：中国博士后科学基金(一等)资助项目(2013M540506);教育部博士点基金资助项目(20133415110003);安徽高校省级优秀青年人才基金重点资助项目(2013SQRL0272D)

摘　　要：针对一种新型低阻力磁垫带式机输送运动稳定性问题,对其磁性输送带—永磁体支撑系统的气隙特性进行研究。建立了其永磁支撑系统三维简化力学模型,在合理假设的基础上,利用Maxwell方程推导出了悬浮力、磁阻力、侧向力的数学表达式,分析了永磁系统的气隙特性,并对不同气隙条件下永磁支撑系统进行有限元仿真,近而得出了气隙与磁通密度的近似关系。仿真结果表明,永磁支撑系统在合适气隙条件下,可以产生较大磁通密度,实现系统悬浮的稳定性,且永磁体中部产生的磁通密度最大,有利于带式输送机的物料运输;在一定条件下,气隙与磁场强度呈非线性关系,随着气隙增大,磁场的强度整体呈减小趋势。To understand the movement stability problem of a new type of low-resistance magnetic cushion belt conveyor,the air gap characteristics of its magnetic conveyor belt-permanent magnetic support system were studied.The simplified mechanical 3D model of the permanent magnetic support system was established.Also,the mathematical expressions of suspension force,magnetic resistance and lateral force were deduced according to the Maxwell equations based on the reasonable assumptions.Then the approximate relationship between gap and flux density was derived from the analysis of the gap characteristics of a permanent magnetic system and the finite element simulation of the support system under different gap conditions.The simulation results show that the permanent support system under suitable conditions of the air gap can generate a greater magnetic flux density to achieve the stability of the suspension system.The flux density value of the middle section of permanent magnets is larger than other sections,which is conducive to the bulk material handling.Under certain conditions,the relationship between gap and flux density is nonlinear.With the gap increase,the overall strength of the magnetic field shows a decreasing trend.

关 键 词：气隙 永磁 磁垫带式输送机 悬浮力 

分 类 号：TD528.1[矿业工程—矿山机电]