Research Of Slurry Shield Hydraulic Drive System

With the rapid development of China’s economy, as well as speeding up the process of the city, more and more cities being restrained because of urban transport problems in the development, the light of the world’s developed countries and urban development experience, around subway to solve this problem well。with the National Development and Reform Commission in2009approval of30new city subway construction program, in the near future China will build more subway. Slurry shield machine is a electrical, hydraulic, mechanical, control, as one large excavation equipment, construction of the subway to play an irreplaceable role in the slurry shield machine is its most important part of the promotion agency, Therefore, slurry shield machine of great importance.This article discusses the development of slurry shield machine of history and the present status, in an extensive literature and field studies, based on the design for a hydraulic propulsion system, the hydraulic cylinder of the shield tunneling work with the regional control strategy, were used to power hydraulic proportional control technology pressure control, speed control and pressure control the speed composite.Through the establishment of the major components of the mathematical model, to simplify the whole system analysis, useing simulation software DSHplus to simulate speed control system, simulate pressure control, speed control simulation of complex flow and to simulate using PID control. obtained in the propulsion system PID control can be made in promoting the process more smooth. Develop the slurry type shield tunneling machine control expert system, making slurry shield machine in the tunneling process can improve the driving efficiency and reducing cutter. Develop the slurry shield machine fault diagnosis expert system, making slurry shield machine in the tunneling process can be time to find fault, and in a very short period of time for fault analysis and troubleshooting, so construction continued. Develop the slurry shield machine of maintenance expert system, the fault is resolved in the event before, but also indirectly reduce the construction cost.