盾构刀盘驱动的电液比例控制系统的设计与实验

Design and experiment of electro-hydraulic proportional control system for the cutter-head drive of the shield tunneling machine

设计了一个盾构掘进机的刀盘驱动液压系统,该系统是开式液压系统,应用电液比例控制技术实现了泵排量实时调节.采用二通插装阀技术实现了高压、大流量液压控制系统的集成,使系统具有结构紧凑、成本低的特点.分析了该液压系统是如何实现泵排量的电液比例控制及其在较大变化负载工况下流量的稳定性.模拟盾构掘进实验时,电气控制为开环控制方式,实验表明,在负载变化较大时,系统能准确地实现刀盘的比例调速,系统的能耗低、温升小,因此,该系统能够很好地满足现代盾构的技术要求.

A hydraulic drive system of cutter head in shield tunneling machine was designed, which is open type hydraulic system and controlled in open-ring. The electro-hydraulic proportional control technique was used to change displacement of pump at real-time. The 2-way cartridge valve technique was also used to assembly hydraulic control valve in the high pressure and high flow hydraulic system with character of compact and lower cost. Analyzed the mechanism of electro-hydraulic proportional control of pump＇s displacement and the mechanism of holding flow stability during the heavier and changeable load. The test dig showed that the cutter head speed can be proportional adjusted reliably when the load changed tem temperature ascended little. So, the drive in large range, and the system has lower power consume, thus, syssystem suits the requests of shield tunneling machine in present-day.