采煤机用智能盘形湿式制动器的研制

发布时间：2018-06-17 20:29

本文选题：盘形湿式制动器 + 温度场　；参考：《西安科技大学》2015年硕士论文

【摘要】：盘形湿式制动器与盘形干式制动器相比,具有散热好,制动性能稳定,使用寿命长等优点。本文根据采煤机实际制动工况,分析了制动器三维模型的温度场分布,针对制动器的温度与摩擦片的磨损量需要人工判断的问题,研制了智能盘形湿式制动器,该制动器具有在线监测制动器的温度和摩擦片的磨损量的功能。本文主要研究工作如下:根据制动器实际工况和工作原理确定了制动参数、有限元位移约束条件,参照制动器的实物建立了三维有限元模型,并应用有限元分析软件Abaqus对采煤机紧急制动过程进行了仿真,得出了制动器摩擦副三维温度场分布规律并找到了最大温升区域。应用excel软件处理制动器与轴向位移的关系曲线,得出更加切合实际的制动器温度与轴向位移之间的的经验公式,这为温度传感器的布置与制动器温度的在线监测提供了重要理论依据。为了能准确判断制动器摩擦片的磨损情况以及制动器的温度,设计了在线监测系统。该系统以C8051F330为核心,设计了位移和温度采集模块、存储电路、报警电路、上位机电路,以及相关的软件程序。用VB编写了上位机界面,并通过RS232标准与单片机互相通信,实现实时显示制动器的温度与摩擦片的磨损量。采用防爆电气理论和技术,合理确定了硬件电路和传感器的安装位置,并对智能盘形湿式制动器电器部分进行了隔爆设计。按照论文研究方案制作了采煤机用智能盘形湿式制动器的功能样机,完成了监测系统硬件电路及软件程序的设计,经过现场调试,该系统实现了对制动器摩擦片的磨损量以及制动过程中温度的监测,对采煤机用盘形湿式制动器的使用安全、产品质量提供了保障。
[Abstract]:Compared with the disk dry brake, the disc wet brake has the advantages of good heat dissipation, stable braking performance and long service life. According to the actual braking condition of the shearer, the temperature field distribution of the three dimensional model of the brake is analyzed in this paper. According to the problem that the temperature of the brake and the wear quantity of the friction plate need to be judged manually, the intelligent disc type wet brake is developed. The brake has the function of on-line monitoring the temperature of the brake and the wear of the friction disc. The main research work of this paper is as follows: according to the actual working condition and working principle of brake, the braking parameters and finite element displacement constraint conditions are determined, and the three-dimensional finite element model is established according to the physical object of brake. The finite element analysis software Abaqus is used to simulate the emergency braking process of the shearer. The three-dimensional temperature field distribution of the brake friction pair is obtained and the maximum temperature rise region is found. Using excel software to deal with the relation curve between brake and axial displacement, a more practical empirical formula between brake temperature and axial displacement is obtained. This provides an important theoretical basis for the arrangement of temperature sensors and the on-line monitoring of brake temperature. In order to accurately judge the wear of brake friction plate and the temperature of brake, an on-line monitoring system is designed. The system takes C8051F330 as the core, and designs displacement and temperature acquisition module, storage circuit, alarm circuit, upper electromechanical circuit, and related software program. The upper computer interface is programmed with VB, and the RS232 standard is used to communicate with the single chip microcomputer to realize the real-time display of the brake temperature and the wear quantity of the friction plate. By using the theory and technology of explosion-proof electric system, the installation position of hardware circuit and sensor is reasonably determined, and the flameproof design of intelligent disc type wet brake is carried out. According to the research scheme of the thesis, the functional prototype of intelligent disk type wet brake for shearer is made, and the hardware circuit and software program of the monitoring system are designed and debugged. The system realizes the monitoring of the friction disc wear and the temperature during the braking process, and provides a guarantee for the safe use and product quality of the disc wet brake used in the shearer.
【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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