中间卸载式长距离带式输送机驱动控制策略

发布时间：2018-07-25 08:10

【摘要】：针对中间卸载式带式输送机在卸载滚筒的驱动控制不当时可能出现滚筒打滑、跳带、输送带松弛、物料堆积、中部和头部电动机功率负载不平衡等问题,提出利用Belt Analyst软件对2种中间卸载式输送机驱动控制方案进行仿真,并通过比较得出最优的多电动机协调方案:离主控制较近的驱动采用扭矩跟踪,相距较远的采用速度跟踪并延迟启动,延迟启动条件设为检测到2%额定带速较合理。为更好地减小输送带的动张力和消除输送带的黏弹性振动,分析比较了匀加速、组合匀加速、组合摆线、组合抛物线等4种速度控制方式的控制曲线和动载荷,得出合理的启动曲线应具有的特征:启动的时间足够长,以保证启动加速度小于规定的加速度;启动加速度较小且没有突变,因为动张力的大小主要取决于加速度最大值。
[Abstract]:In view of the improper driving control of the intermediate unloading belt conveyor in the unloading drum, such problems as roller slip, belt jumping, belt relaxation, material accumulation, unbalanced power load of the middle and head motor, etc. In this paper, two kinds of drive control schemes of intermediate unloading conveyor are simulated by using Belt Analyst software, and the optimal multi-motor coordination scheme is obtained by comparison: torque tracking is used for the drive near the main control. When the distance is far away, the speed tracking is used and the starting time is delayed. The setting of the delayed starting condition is that the rated speed of 2% is more reasonable. In order to reduce the dynamic tension of conveyor belt and eliminate the viscoelastic vibration of conveyor belt, the control curves and dynamic loads of four speed control modes, namely uniform acceleration, combined cycloid and combined parabola, are analyzed and compared. It is concluded that the reasonable starting curve should have the following characteristics: the starting time is long enough to ensure that the starting acceleration is less than the specified acceleration, and the starting acceleration is small and there is no mutation, because the magnitude of dynamic tension mainly depends on the maximum acceleration.
【作者单位】：中国矿业大学机电工程学院;
【基金】：国家自然科学基金联合基金项目(U1510116) 教育部蓝火计划项目(2014-LHJH-HSZX-013)
【分类号】：TD634.1

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