直线电机在带式输送机上应用的可行性研究

发布时间：2018-11-19 11:12

【摘要】：带式输送机是现代运输物料设备中不可缺少的设备之一,以结构简单、操作方便、便于维修、动力资源耗损少、运行可靠、通用性强等优点见长。随着科技的发展,带式输送机也在朝着更远距离,更高带速,更大运量的方向发展。此时,带式输送机的驱动系统也就成为了研究的重点之一,因为它是输送机的关键设备和动力源,只有通过驱动系统才能把其它形式的能量传送给输送机。在长距离的输送中人们大多采用的驱动方式仍是以机头集中驱动为主。为了能够降低带在长距离输送过程中的张力,现代也有诸多带有辅机的中间驱动技术。本文提出一种新的驱动方式：直线电机直接驱动。所谓直线电机驱动是指采用多台直线电机直接驱动带式输送机,而不借助于旋转电机机头或机尾的驱动力。这样就避免了输送机在起动过程中的高动张力,降低了输送带因单机长度的增加而随之增加的拉力。此外,直线电机无需接触便可传递作用力；电机直线运动,省去中间传动装置；电机初级可沿输送带任意布置,理论上可以无限增加输送距离。直线电机应用于输送机上,初级沿输送带长度方向布置,次级埋入输送带内。能埋入输送带的次级要求它必须满足一定的刚度和韧性,它可以沿输送带弯曲绕过滚筒,当承载物料时又可以弯曲成槽。本论文通过对同、异步直线电机各自特性的比较,对直线感应电机次级材料的分析对比,对多种型式复合次级的材料、结构的比较,设计出网格型复合次级直线感应电机作为输送机的驱动装置。通过对网格型复合次级的模型进行理论分析、求解电压方程,进而用Ansofl Maxwell2D进行电磁仿真,来确保电机性能的可靠性。在确定次级型式之后,需要进行次级输送带的设计,其制造工艺和普通输送带的并无差异,这样就有利于技术的推广。在满足各台驱动电机牵引力、驱动功率均衡的情况下,本文通过理论计算得出,在一定长度的输送距离内所需电机的台数,初级在沿输送带长度上合理布置。通过RecurDyn对直线电机驱动带式输送机的起动特性进行仿真,求解直线驱动系统对输送机启动时速度、加速度及带的张力的影响。本论文通过理论计算与计算机仿真,通过全面的分析认为直线电机在带式输送机上的应用是可行的。
[Abstract]:Belt conveyor is one of the indispensable equipments in the modern transportation material equipment. It has the advantages of simple structure, convenient operation, convenient maintenance, less power consumption, reliable operation, strong versatility and so on. With the development of science and technology, belt conveyors are moving toward the direction of longer distance, higher speed and larger volume. At this time, the driving system of belt conveyor has become one of the focus of the research, because it is the key equipment and power source of the conveyor, only through the drive system can other forms of energy be transferred to the conveyor. In the long distance transportation, most of the driving methods are still the head concentrated drive. In order to reduce the tension of belt during long distance transportation, there are many intermediate drive technologies with auxiliary machines. In this paper, a new driving method, linear motor direct drive, is proposed. The so-called linear motor drive refers to the belt conveyor driven directly by multiple linear motors without the help of the driving force of the head or tail of the rotary motor. In this way, the high dynamic tension in the starting process of the conveyor is avoided, and the tension of the conveyor belt increases with the increase of the length of the conveyer. In addition, the linear motor can transfer the force without contact; the motor moves in a straight line and the intermediate transmission device is omitted; the primary motor can be arranged arbitrarily along the conveyor belt, and theoretically it can increase the conveying distance indefinitely. Linear motor used in conveyor, primary along the conveyor belt length direction, secondary buried in the conveyor belt. It must satisfy certain rigidity and toughness, it can bend around the drum along the conveyor belt and bend into groove when carrying the material. This paper compares the characteristics of the same, asynchronous linear motors, the secondary materials of the linear induction motors, the materials and structures of various types of composite secondary motors. The grid type composite secondary linear induction motor is designed as the driving device of the conveyor. Based on the theoretical analysis of the mesh-type composite secondary model, the voltage equation is solved, and then the electromagnetic simulation is carried out with Ansofl Maxwell2D to ensure the reliability of the motor performance. After the secondary type is determined, it is necessary to design the secondary conveyor belt, and there is no difference between the manufacturing process and the ordinary conveyor belt, which is beneficial to the popularization of the technology. Under the condition of satisfying the traction force of each driving motor and equalizing the driving power, the theoretical calculation shows that the number of motors needed in a certain length of conveying distance is reasonably arranged at the primary level along the length of the conveyor belt. The starting characteristics of belt conveyor driven by linear motor are simulated by RecurDyn, and the effects of linear drive system on the speed, acceleration and tension of belt are solved. Through theoretical calculation and computer simulation, it is concluded that the application of linear motor in belt conveyor is feasible.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TM359.4;TH222

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