带式输送机启动不打滑的动态特性研究与应用
Application and Dynamic Characteristics Research of Start Non-Skid for Belt Conveyor
-
摘要: 针对采用刚体动力学模型对带式输送机进行不打滑理论分析时,存在动张力和张紧力不能被准确计算导致理论分析与实际结果不符的问题,在建立带式输送机黏弹性动力学模型的基础上,对带式输送机进行启动不打滑的动态特性研究,通过设计合适的启动加速度和启动时间,精确计算出输送机启动过程中输送带的动张力,由此动张力计算出的输送机启动所需张紧力能有效限制输送机启动时的黏弹性振动,从而防止打滑事故的发生。山西某煤矿主斜井带式输送机现场启动试验结果及理论计算证明,带式输送机启动不打滑的动态特性研究设计计算结果可以解决带式输送机启动打滑的问题。Abstract: Aiming at using the rigid body dynamics model of belt conveyor to make start non- skid theoretical analysis would lead that the dynamic tension and tens ion force could not be accurately calculated, which would easily cause the problem that actual results was different from theoretical analysis. For the problem, this pape r established the viscoelastic dynamics model to make the dynamic characteristics study of start non- skid for the belt conveyor. Not only could the internal dynamic ten sion be accurately calculated, but also could the internal dynamic tension which the belt had during the belt conveyor starts be reduced by designing an appropriate sta rting acceleration and appropriate starting time. Based on the above discussion, the calculated tension force which was required for the belt conveyor starting could effe ctively limit the viscoelastic vibration when starting so that it could effectively prevent the occurrence of start skid. The theoretical calculations and starting tests in Shan xi province confirmed that the results of the dynamic characteristics study of start non- skid for the belt conveyor could solve the problem of start skid for the belt conve yor