磨机慢驱液压双驱动自动平衡过程电液控制设计与实现

Design and implementation of electro-hydraulic control during autogenous balance of hydraulic dual inching drive of mill

目前大型磨机的慢驱驱动装置多采用液压双驱方式。当慢驱驱动装置停止旋转后,磨机筒体内堆积物料产生的偏载负荷转矩作用于齿式离合器上,导致齿式离合器在最大脱齿压力下很难脱开。结合当前实际,对现有慢驱装置增加比例方向阀平衡控制单元,采集筒体转速信号,通过设计控制策略实现筒体自动平衡,解决了磨机慢驱齿式离合器全自动脱齿的技术难题,可以一次性高效准确地完成磨机慢驱液压双驱装置齿式离合器的脱齿工作。

At present, the inching drive of the large mill mostly adopts the hydraulic dual drive unit. On the inching drive halting, the eccentric load torque due to piled material inside the mill shell acts on the toothed clutch, which results in the clutch is hard to disengage even under the maximum disengaging pressure. In the paper, based on the reality, the proportional directional valve was added to the existing inching device to balance the control unit, the rotary speed signal of the shell was collected, and the control strategy was designed to realize the autogenous balance of the shell, thus the technical problem of autogenous disengagement of the toothed clutch of the inching drive was solved. Thus the disengagement of the toothed clutch of the hydraulic dual inching drive of the mill could be effectively and accurately completed one time.