矿用永磁磁力耦合器的分析与研究

发布时间：2018-06-29 16:16

本文选题：永磁磁力耦合器 + 软启动　；参考：《煤炭科学研究总院》2017年硕士论文

【摘要】：永磁磁力耦合器利用导体盘与永磁体盘无接触相对转动,通过磁场穿过工作气隙进行力矩和运动的传递,且可以通过调节两盘之间的气隙宽度来调整控制传递扭矩和负载速度。它具有结构简单、环境适应力强、节能环保、隔离振动传递、避免产生电力谐波和电磁干扰等优点,现在已经成功应用在电力、石油、化工等行业,但在煤矿生产中的应用还不成熟。本文针对矿用带式输送机,对永磁磁力耦合器的设计与分析方法展开如下研究:(1)详细综述了永磁磁力耦合器的基本结构特点和工作原理,根据煤矿上的工作状况,参考现有永磁磁力耦合器的结构和性能,对盘式永磁磁力耦合器展开详细结构分析和磁路设计。通过比较永磁体不同充磁方向对轴向气隙的磁感应强度的影响,确定了永磁体的充磁方向应沿永磁体盘的轴向充磁。通过对不同永磁材料的比较和分析,最终选择了钕铁硼永磁体材料。(2)根据永磁磁力耦合器结构特点和材料属性进行电磁场分析,利用Ansoft软件对永磁磁力耦合器建立三维模型并对模型进行有限元静态、瞬态仿真,并针对不同因素对永磁磁力耦合器输出转矩的影响进行分析和研究。根据仿真分析结果对永磁磁力耦合器的各参数尺寸进行优化。(3)根据传热学理论及永磁磁力耦合器的实际运行状态,利用Ansys Workbench软件对永磁磁力耦合器进行稳态温度场计算及温升情况分析,确保永磁磁力耦合器能够安全可靠地运行。(4)针对大型带式输送机的技术要求,本文从矿用带式输送机的启动曲线出发,研究永磁磁力耦合器的软启动特性。通过给定的带式输送机的启动速度曲线计算出永磁磁力耦合器的输出端的转速与转矩随时间的变化值,结合仿真得到的永磁磁力耦合器的气隙与转速的关系,最终得到永磁磁力耦合器的气隙随时间的变化情况。
[Abstract]:The permanent magnet magnetic coupler transfers the torque and motion through the working air gap by using the conductor disk and the permanent magnet disk without contact relative rotation, and can adjust the transfer torque and load speed by adjusting the air gap width between the two disks. It has the advantages of simple structure, strong adaptability to the environment, energy saving and environmental protection, isolation of vibration transmission, avoiding the generation of power harmonics and electromagnetic interference, and has been successfully applied in power, petroleum, chemical and other industries. But the application in the coal mine production is not mature. In this paper, the design and analysis methods of permanent magnet magnetic coupler are studied as follows: (1) the basic structure characteristics and working principle of permanent magnet magnetic coupler are summarized in detail, and according to the working condition in coal mine, the design and analysis method of permanent magnet magnetic coupler are studied as follows: (1) the basic structure and working principle of permanent magnetic coupler are summarized in detail. Referring to the structure and performance of the present permanent magnet magnetic coupler, the structure analysis and magnetic circuit design of the disc type permanent magnet magnetic coupler are carried out in detail. By comparing the effect of different magnetization directions on the magnetic induction intensity of the axial air gap, it is determined that the magnetization direction of the permanent magnet should be along the axial magnetization direction of the permanent magnet disk. Through the comparison and analysis of different permanent magnetic materials, the NdFeB permanent magnet material is finally selected. (2) electromagnetic field analysis is carried out according to the structure characteristics and material properties of the permanent magnetic coupler. The 3D model of permanent magnet magnetic coupler is established by using Ansoft software, and the finite element static and transient simulation of the model is carried out, and the influence of different factors on the output torque of permanent magnet magnetic coupler is analyzed and studied. According to the results of simulation analysis, the parameters of permanent magnetic coupler are optimized. (3) according to the theory of heat transfer and the actual operation state of permanent magnetic coupler, The steady-state temperature field calculation and temperature rise analysis of permanent magnet magnetic coupler are carried out by using Ansys Workbench software to ensure that the permanent magnet magnetic coupler can operate safely and reliably. (4) according to the technical requirements of large belt conveyor, Starting from the starting curve of mine belt conveyor, the soft start characteristics of permanent magnet magnetic coupler are studied in this paper. The speed and torque of the output end of the permanent magnet magnetic coupler are calculated by the given starting speed curve of the belt conveyor, and the relationship between the air gap and the rotational speed of the permanent magnet magnetic coupler is obtained by combining the simulation results. Finally, the air gap of permanent magnet magnetic coupler is obtained.
【学位授予单位】：煤炭科学研究总院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD528.1

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