带式输送机用直线电机静动态特性试验与分析

发布时间：2018-06-02 10:11

本文选题：带式输送机 + 直线电机　；参考：《工程设计学报》2017年03期

【摘要】：多机驱动在输送装备实现高速、长距离、大运量等方面起着至关重要的作用。直线电机因其具有不存在摩擦、无旋转传动部件、能够沿输送机长度方向任意布置和降低输送带张力等特点而成为特殊高性能带式输送机较理想的中间驱动方式。通过分析直线电机的工作原理,对直线电机与旋转电机的优缺点进行了比较;针对带式输送机用直线电机,对比确定了其次级型式,并进行了次级输送带结构设计;基于封闭式散料储运物料试验系统建立了静动态特性试验台,并运用欧拉公式及逐点张力法求得直线电机推力(输送带张力差),进而分别对电压、气隙与推力之间的比例关系进行了试验验证,并间接进行了动态试验(机械特性试验),得到了推力关于输送带速度的数学表达式;基于Belt Analyst带式输送机计算分析软件,对输送带稳定运行及启动过程的张力进行了仿真分析,并与试验张力进行了对比分析。试验结果表明:推力分别与电压平方、气隙倒数的平方成正比;电压、气隙与推力之间的理论曲线与试验值相符;直线电机的推力与输入功率的比值较大,并随着气隙的减小,比值越来越大;与旋转电机相比,此直线电机无临界转速,并显示出很软的机械特性;稳定运行时张力的仿真值与试验值基本吻合,其相对误差均小于2%,但启动过程中张力试验值与仿真值误差较大,间接表明保证启动过程气隙均匀的重要性。研究结果可适用于多机配合驱动超长距离带式输送机的改进与实际应用中。
[Abstract]:Multi machine drive plays an important role in the transmission equipment to realize high speed, long distance and large capacity. The linear motor has the characteristics that it has no friction, no rotating transmission parts, can arrange and reduce the tension of conveyor belt along the length direction of the conveyor, and becomes the ideal intermediate driver for the special high performance belt conveyor. By analyzing the working principle of the linear motor, the advantages and disadvantages of the linear motor and the rotating motor are compared. In view of the linear motor of the belt conveyor, the secondary type is determined by contrast, and the structure of the secondary conveyer belt is designed. The static and dynamic characteristic test platform based on the closed material storage and transportation material test system is set up, and the application of the static and dynamic characteristic test platform is established. The Euler formula and point by point tension method are used to obtain the thrust of the linear motor (the differential tension of the conveyer belt), and then the proportional relation between the voltage, the air gap and the thrust is tested respectively, and the dynamic test (mechanical characteristic test) is carried out indirectly, and the mathematical expression of the thrust on the speed of the conveyer belt is obtained; based on the Belt Analyst belt conveyor meter, The analysis software is used to simulate the tension of the stable operation and starting process of the conveyer belt, and compared with the test tension. The test results show that the thrust is directly proportional to the square of the voltage and the square of the air gap reciprocal; the theoretical curve between the voltage, the air gap and the thrust is in agreement with the test value; the thrust and the input work of the linear motor are the same. The ratio of the rate is larger and the ratio is increasing with the decrease of the air gap. Compared with the rotating motor, the linear motor has no critical speed, and shows a very soft mechanical characteristic. The simulation value of the tension is basically consistent with the test value, and the relative error is less than 2%, but the error of the tension test and the simulation value is larger than that in the starting process. It shows the importance of ensuring the uniform air gap in the start-up process. The research results can be applied to the improvement and practical application of the multi machine driven ultra long distance belt conveyor.
【作者单位】：太原科技大学机械工程学院;山西省物料仓储与装卸输送装备工程技术研究中心;太原重型机械集团矿山设备分公司;
【基金】：国家自然科学基金面上项目(51575370) 山西省煤基重点科技攻关项目(MJ2014-09,MJ2014-02) 山西省回国留学人员科研资助项目(2016-093) 山西省研究生优秀创新项目(2016BY134) 山西省研究生教育创新项目(2015BY49) 晋城市科技计划项目(201501004-14)
【分类号】：TH222

【相似文献】