采煤机用智能干式多片制动器的研制

发布时间：2018-05-18 05:35

本文选题：干式多片制动器 + 防爆　；参考：《西安科技大学》2015年硕士论文

【摘要】：制动器是采煤机安全制动装置,本课题研制具有在线监测功能的采煤机用智能干式多片制动器,该制动器除了满足普通盘式液压制动器性能参数外,还应具备在制动器工作时对摩擦材料磨损量、温度进行实时监测,并具有判断是否超出极限,超出极限值时则发出警报信号的功能。本文研究利用微电子新技术、传热理论、有限元分析方法、防爆电气理论和技术对液压制动器进行了设计研究。主要工作如下:(1)详细介绍了盘式制动器的发展现状、结构原理,在此基础上,采用防爆电气理论和技术对采煤机用智能干式多片制动器的总体方案进行了设计。(2)根据制动器的结构及工作原理,建立了三维制动器模型,并对其紧急制动工况下的相关参数进行了计算,使用有限元分析软件ABAQUS进行了其紧急制动工况下的热-结构耦合温度场的分析,得出了采煤机紧急制动工况下的三维摩擦温度场的分布变化规律。目前现有的二维模型施加热流密度的分析方法不能准确反映制动器的实际制动过程,采用三维模型的摩擦热分析方法可以真实地反映实际的制动过程,该模型克服了二维模型分析方法中因忽略摩擦温度场的不完全对称及盘片之间的应力分布关系而存在的缺陷,使温度场的分布变化规律更符合实际。(3)通过研究温度场沿制动器轴向的分布规律,对制动器最高温度处的延轴向的坐标点的温度值进行曲线拟合,建立了温度沿轴向位移变化的方程,为温度传感器的安装位置选择及监测提供了理论支持。(4)研制了一种单片机智能监测系统。该系统以C8051F334为控制核心,实现了传感器对温度和磨损量采集与处理、数据存储以及超限报警,上位机实现温度和磨损量的实时监控、记录以及保存。
[Abstract]:The brake is a safe braking device for shearer. This subject develops intelligent dry multi-disc brake for shearer with on-line monitoring function. The brake not only meets the performance parameters of conventional disc hydraulic brake, but also meets the performance parameters of conventional disc hydraulic brake. It should also be able to monitor the friction material wear and temperature in real time while the brake is working, and to judge whether the limit is exceeded or not, and to send out an alarm signal when the limit value is exceeded. In this paper, the design of hydraulic brake is studied by using new microelectronic technology, heat transfer theory, finite element analysis method, explosion-proof electrical theory and technology. The main work is as follows: 1) on the basis of the detailed introduction of the development status and structure principle of disc brake, The general scheme of intelligent dry multi-disc brake for shearer is designed by using explosion-proof electric theory and technology. (2) according to the structure and working principle of brake, a three-dimensional brake model is established. The relevant parameters under the emergency braking condition are calculated, and the thermal-structure coupling temperature field under the emergency braking condition is analyzed by using the finite element analysis software ABAQUS. The distribution and variation of three-dimensional friction temperature field under emergency braking condition of shearer are obtained. At present, the existing analysis methods of heat flux density in two-dimensional model can not accurately reflect the actual braking process of the brake, and the friction heat analysis method based on the three-dimensional model can truly reflect the actual braking process. The model overcomes the defects of the two-dimensional model analysis method because of neglecting the incomplete symmetry of the friction temperature field and the stress distribution relationship between the disks. By studying the distribution of temperature field along the axial direction of the brake, the temperature value of the coordinate point at the maximum temperature of the brake is fitted by curve. The equation of temperature variation along axial displacement is established, and a single chip microcomputer intelligent monitoring system is developed for temperature sensor installation position selection and monitoring. The system takes C8051F334 as the control core, realizes the sensor to the temperature and the wear quantity collection and processing, the data storage and the over-limit alarm, the upper computer realizes the temperature and the wear quantity real-time monitoring, the record and the preservation.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD632.1

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