下运带式输送机制动系统控制过程研究

Research on control process of the downward belt conveyor brake system

根据下运带式输送机不同的运行工况 ,提出了基于工况识别的闭环控制方案 ,提出了下运工况下的临界加速度的定义及对自启动工况的推论 ,该控制系统方案可以实现软启动和软停车 ,改变了传统的下运输送机控制中采用的开车就是开电机 ,停车就是停电机的控制方案 ,使下运带式输送机的安全可靠运行得到控制上的保障。

Having analyzed the bakes on the design of control system of hydraulic moment-adjusted brake system, the author presents a closed loop control system in the process of start and braking of the conveyor. On the basis of the concept of the critical time and the critical acceleration and its deductions,the working mode of the conveyer can be identified and controlled in feedback,furthermore,thus realize the process of soft start. In the deceleration process,the author points out the problems that exist in the present control system and sets forward the control process that acted by the combined function of brake moment of motor and the drag torque of hydraulic brake at the beginning of deceleration,it will further improved reliability of conveyor system.