带式输送机液粘软起动装置动力传递机理研究

Power transmission mechanism of hydro-viscous soft start device for belt conveyor

针对矿用带式运输机在煤矿水平运输和倾斜运输过程中,所存在的大惯量、大负载、起动冲击剧烈等问题,开展了软起动理论研究。研究并分析了液粘软起动装置的结构特点以及动力传递机理,选用理想的起动曲线,利用数值计算以及仿真分析的方法,分析了液粘软起动装置在调速过程中的油膜动态变化特性;采用数值计算的方法求得了起动过程中的油膜承载力及转矩变化情况。研究结果表明:在调速过程中时,油膜厚度随起动时间的增加逐渐降低,转矩和油膜承载力随起动时间增加先增加后减小,当起动时间16 s时分别达到最大值,液粘软起动装置满足起动过程中对速度以及起动时间的要求,为液粘软起动装置的设计与应用提供了理论参考。

Aiming at the characteristics of large inertia,large load and severe starting shock of the minebelt conveyor,during the working process of horizontal transportation and inclined transportation of coal mines,the soft start technology was investigated in detail.The hydro-viscous soft starter was selected to analyze its structure and transmission mechanism.According to the ideal starting curve,the numerical simulation and simulation analysis method were used to analyze the dynamic change characteristics of the oil film in the speed regulation process of the hydro-viscous soft starter.The bearing capacity and torque variation during the process were obtained by using numerical calculation.The results indicate that during the speed regulation process,the starting time of the oil film thickness increases gradually.During the starting process,the torque and oil film bearing capacity increase first and then decrease with the increase of the starting time.When the starting time is 16 s,the maximum value is reached respectively.The hydro-viscous soft start device meets the requirements of speed and starting time during the starting process,which provides a theoretical reference for the design and application of the hydro-viscous soft starter.