【作者】 晏飞；

【导师】 郁钟铭；

【作者基本信息】 贵州大学 ， 采矿工程， 2009， 硕士

【摘要】 随着采煤工作面刮板输送机逐步向大功率、大运量、大运距和高可靠性方向发展,其性能的要求也在不断的提高。本文针对链条张力的不稳定性,对刮板输送机的链条张力自动监控系统进行了理论分析和模拟研究。本文首先对刮板输送机链条进行了受力分析,同时对张力调节装置进行了必要性分析,给出了伸缩装置的基本参数的计算方法,并分析了不同规格链条的弹性模量的计算方法;其次分析了机头链轮松边链条的悬垂量与张力的关系。本文利用FXIN系列PLC设计了刮板输送机链条张力自动监控系统的硬件部分和软件部分;最后对张力调节装置的液压系统进行了分析设计,并利用MATLAB 6.0对整个自动监控系统进行了系统稳定性模拟。本监控系统通过监测刮板输送机运行状况,进而对刮板输送机在运行过程中不断加以控制,从而为整个生产的正常运行提供了保障。本系统具有可靠性高、抗干扰能力强、编程简单、直观、适应性好、维护简单等特点,能很好地适应煤矿井下电网电压波动范围大(75%-110%),磁场不稳定等实际情况。更多还原

【Abstract】 With the development of AFC which now is towards to long distance, high speed, long carrying capacity and large driving power, the request for its performance is improving constantly too. This paper analysed the AFC’s chain tension control system aiming at the instability of the chain’s tension.First, this paper Stress Analysis for chains of the AFC, and it analyses the necessity of the tension control device of the AFC, and it introduces the calculation methods of the parameter of the extending device and the young’s modulus of chains for different types. Second,it analyses the relation between the sag and the tension of the loose side chain at the head end unit of AFC. this paper designed the AFC’s chain tension automatic monitoring and control system hardware and software parts using FX1N series PLC. Finally, this paper analyses the hydraulic pressure system of the tension control device, and makes a System stability simulation of the whole control system with software MATLAB 6. 0.This detection system for analyzing the scraper conveyer operation conditions, and then controlling the scraper conveyer constantly, provides safeguard for the normal running of the whole production. The system has the features such as high reliability, strong anti-interference ability, simple program, intuitive, adaptive, and easy maintenance etc . it Can be well adapted to the actual situation such as underground of coal mine power grid voltage fluctuation range (75%—110%) and the magnetic field instability.更多还原