主驱动密封系统试验台液压系统研究

The research on hydraulic system of main drive seal system

试验台模拟了盾构机主驱动密封的工作环境,为解决现有的实验装置无法实现使密封圈在左右两腔不同压力点的工作状态,对试验台液压控制系统进行研究。介绍其液压系统的原理组成及其加载装置和动力装置。动力装置通过调节变量泵的排量改变液压马达的转速,以及控制电磁换向阀实现正反转;加载装置通过比例减压阀对油缸输出压力,使波纹管压缩,经由高压液压软管总成对实验容器左右两腔分别加压。并通过AMESIM对以比例减压阀为核心的闭环控制系统进行仿真分析。最终结果表明该控制系统可以满足实验要求。

The test bed simulates the working environment of the main drive seal for shield machine. In order to solve the problem that the existing experimental device cannot achieve the working state of the sealing ring at different pressure points in the left and right cavities, the hydraulic control system of the test bed is studied. The principle and composition of its hydraulic system, including its loading device and power device, are introduced. The power device adjusts the displacement of variable pump to change the speed of hydraulic motor, and controls the electromagnetic directional valve to realize positive and negative rotation. The loading device outputs pressure to the cylinder by proportional pressure reducing valve to compress the bellows, and pressurizes respectively the left and right cavities of the experimental vessel by the high-pressure hydraulic hose assembly. The AMESIM is used to simulate and analyze the closed loop control system with proportional pressure reducing valve as the core. The final results show that the control system can meet the experimental requirements.