全液压钻机给进液压系统的负载特性

摘要

Through the analysis of the actual working conditions and load characteristics of the full hydraulic drill machine, the relationship of the friction coefficient between the drill sleeve and the drilling tool is established.The mathematical model of the pressure control system for the drilling of pressure increase and pressure relief is established according to the optimization design of the feeding electro-hydraulic system.What's more, according to the different situations of geological drilling, the control loop performance with the overflow pressure and control loop pressure-flow with electric proportional directional valve's opening degree are analyzed.We researches the effect on pressure control performance of variable load to achieve energy saving and high efficiency loop control.Through collecting the feeding hydraulic cylinder load force of the field and contrasting simulation analysis, the conclusion shows that feed pressure control loop can accurate adjust the pressure, to effectively control the feed pressure of feeding electro-hydraulic system safely, stably and optimally.%通过对全液压钻机实际工况和负载特性分析,建立钻套与钻具之间的摩擦系数关系,针对给进电液系统进行优化设计,分别建立加压钻进和减压钻进压力控制系统数学模型;根据钻进地质情况的不同,对控制回路性能与溢流压力关系和控制回路压力-流量与电比例换向阀阀口开度关系进行分析,研究变负载对压力控制性能的影响,实现高效节能的回路控制.通过现场对给进液压缸负载力的采集,对比仿真分析,充分证明了给进压力控制回路可以对加压力准确调节,使钻杆在实际钻进过程中安全、平稳,优化后的给进电液系统在给进压力控制方面效果显著.